Abstract:
The method introduces additives into a flowing melt or fluidized metallic/ceramic powder media in a pulsed high pressure manner. The nozzle needle of at least one nozzle is variable and highly precisely moved for the introduction by means of a device and in such a way that additive is dosed exactly in relation to the volume flow of the medium. The pulsating additive stream is injected into the flowing medium by at least one well-aimed nozzle opening. The additives are dosed by means of a pressure that can be variably adjusted by pulse width and pulse frequency. The desired homogenous distribution is obtained by the penetrating injection jet.

Description:
This application is a Division of Ser. No. 10/958,855, filed Oct. 5, 2004 which is a Division of Ser. No. 09/936,039, filed Sep. 8, 2001, now U.S. Pat. No. 6,866,171. 
    
    
     This invention relates generally to a method for introducing additives into flowing or fluidized media with specific application for metallurgical, metal/ceramic powder technology processes. 
     BACKGROUND 
     U.S. Pat. No. 4,474,717 describes an injection of a small portion of plastics without introducing inert gas (preloading) followed by sectional introduction of inert gas using frequencies from 4 to 100 cycle per second having a pressure of 300-1500 psi (2 to 10 MPa) into the continuous passing plastic material. The result is a multi-layered internal foamed structure. The present invention expands this method by applying injection technology used in the combustion engine technology and reaching a more intensive penetration by higher pressure (40 to 200 MPa), higher frequency (100 to 1000 hz) and more exact dosing by controlled width of the pulses, frequency of the pulses and regulation of pressure using this technology. 
     The pulsing adding of liquid and gas is state of the art in burner systems, airless jet systems and spraying systems (atomizers). The present invention is distinguished from these applications by higher pressure of the liquid than 40 MPa and high energy atomizing. This pressure is not possible with the nozzles used at this time. Only by electrical activated hydraulic servo valves in common rail technology can these pulsations be realized. 
     SUMMARY OF THE INVENTION 
     The basic concept of the method for introducing additives consists of obtaining intensive atomizing, mixing and deep penetrating of additives into the medium stream by using high kinetic energy of the additives and exact timed pulsing and exact pulse width using appropriate injectors. 
     The exact dosing of the additives is obtained by regulation of the operation parameters of introduction for instance pressure, frequency, pulsing width, etc. 
     The state of the art of combustion engines using the “common rail” injection technology is utilized. The flexibility of this system by modifying the operating parameters is the highlight of this technology in comparison to the present mechanically operated injection methods. The common rail is loaded with fuel being pressurized up to 200 MPa and supplies the injector with this constant pressure. Electronic controller activating solenoid and piezo-operated, electro-hydraulic servo-valves move the nozzle needle by push rods with high precision. According to this technology exact dosing and homogenous distribution will be obtained. 
     The application and further development of this injection technology is subject to utilizing this improved technology for further applications as mentioned before. Furthermore, detailed design and configuring of nozzles, nozzle-needles, the arrangement of orifices in position and shape as well as arrangement of injectors are aspects of this invention. 
     The spatially predetermined position of the additives in the flowing material, also called fluid bed, is obtained by controlling the pulsating injection. The introduction and exact dosing of additives, that is hardeners, dyes, gas producers and softener for instance, into a liquid metal melt, metal/ceramic powder technology stream or metal stream for instance or the fluid bed of bulk material, such as powder, granules and pellets, is carried out by means of an injector. 
     The invention is used in melting units, in hot channel systems, in tools, components of tools and extruders, metal, metal/ceramic powder technology injection moulding, pelletizing, arrangements. 
     The nozzle needle of at least one nozzle is variable and highly precisely moved for the introduction by means of a device and in such a way that an additive is dosed exactly in relation to the volume flow of the medium and that a pulsating stream is injected into the medium flowing past the pulsating stream by means of at least one well-aimed nozzle opening. The additives are dosed by means of a pressure that can be variably adjusted such as by pulse width and pulse frequency. The desired homogenous distribution is obtained by the penetrating injection jet during compounding for instance. 
     The invention is particularly directed to the following applications: 
     i) Introduction into the metal, metal/ceramic powder technology melt stream. The introduction happens after the extruder unit. This is for many processes listed below having advantages noted. Producing material of different properties out of one plasticizing unit is possible. 
     ii) For metal, metal/ceramic powder technology Injection moulding systems, predetermined properties like porosity, coloring are possible by one process step through variable introduction. Only multi-component metal, metal/ceramic powder technology injection moulding machines can accomplish this today. 
     iii) For extruder systems, profiles can be extruded with different components at predetermined sections which can be foamed by diverting the metal, metal/ceramic powder technology melt stream and introducing gas creators in one side stream by an injector so that this melt stream will expand and joined together with the material of the main stream. 
     iv) Metal, metal/ceramic powder technology for sheet and tube extruders can be introduced with dyes, gas processors and softeners after the extruder. Therefore, a fast change of the material properties is possible that leads to economical flexibility in the production process. 
     The following application, processes and devices can be economically realized with the invention:
         Introducing, dosing and homogenous distribution of additives such as, hardeners, dyes, gas processors, softeners and reactants into the melt stream of metal, metal/ceramic powder technology in:
           extrusion systems for sheets, tubes and profiles.   compounding systems for production and adaptation of metals, metal/ceramic powder technology   metal, metal/ceramic powder technology Injection moulding, forming operation, preform manufacturing systems.   auxiliary processing, forming operation, preform manufacturing systems.   
           Introducing, dosing and homogenous distribution of additives into fluidized material like bulk and powder material (ceramics, metalics), granules, pellets in plants operating fluidized bed and whirl sintering installations.
 
Method of Introducing Additives.
       

     Exact dosing and homogenous distribution is utilized. The present invention relates to introducing additives for instance gas processors into the melt stream of low melting metals. 
     The advantage of this process is the application of light weight structures at locations of a part where it is demanded. The gas processing substance for expanding the matrix material is introduced in spatially predetermined positions. Various operation modes and combination of these can be obtained firstly by pressure differences between melt and gas processing substances and secondly by the frequency of pulsation and thirdly by the shape of the nozzle reaching into the melt channel. 
     i) Creation of Foam: 
     Creation of foam is possible using high frequency pulsation and therefore atomizing at high pressure differences and the advantages of counterflow and the subsequent high acceleration of the melt past variable sections of the melt channel. The difference in the speed of melt and additive is selected to be of a high value. 
     ii) Macro-hollow Cavities: 
     The introduction happens by drop shaped dosing of the melt flow at low frequency of the pulsation and only small pressure difference in flow direction and essentially laminar streaming conditions of gas processors and melt. 
     iii) Continuous Introduction: 
     Continuous introduction of a string of gas processors at nearly adequate flow speed of the passing medium. Small pressure difference is an advantage. 
     An apparatus for injection molding of compound parts with charger, which are connected to a pump which is compressing a chemical blowing agent has been published in DE1948454 to achieve a spatially predetermined foaming. Because of the insufficient mixing and dosing, the proposed foam quality cannot be reached. The present invention is distinguishes from this apparatus by using injectors (combination of valve and nozzle) and pulsing injection and optionally using a continuously pressurized pipeline “common rail” and hydro-electrical activated valves. Because of the shaping of nozzles and channels according to hydrodynamic principles as well as regulated pressure, the apparatus is different. The solenoid is activated by electrical supply and optionally controlled to generate selected wave forms from an arbitrary wave generator. This leads to operation mode like atomizing, dosage and continuous string. The selection of pressure difference and frequency of pulsation leads to a predetermined introduction of gas processors into the melt. The exact dosing and pressure regulation leads to a targeted dosage of drops into the melt resulting in a subsequent macro hollow cavity expansion. 
     The apparatus for introduction of gas creating substances into the highly pressurized melt consists of a nozzle in immediate connection with a servo-valve, or consists of a pump-nozzle system with a non-return-valve combination. 
     The injection technology of combustion engineering has reached a high state of art concerning the exact repeatability due to the demands of strict exhaust specifications and is especially applicable to the invention. The state of the art is shown by “fuel-injection valves for internal combustion engines” disclosed in DE2028442. The hydraulic activation of the valve push rod is regulated by a three way valve. An “injection device” with hydroelectric activation is described in FR2145081. The valve is pushed by a continuous hydraulic pressure and released by a controlled pressure loss on the backside of the push rod. In U.S. Pat. No. 3,990,422, the control of the hydro-electric activation has been improved by using a two circuit hydraulic system. 
     The present injectors show features which are necessary to comply with the demands of the inventive application and specification thereof. These are pressure regulation, electro-hydraulic activation by a push rod valve and pressure controlled by a sphere valve at the high pressure circuit, which is necessary to reach the high frequency pulsation and have the high pressure available at the nozzle needle immediately at the valve seat by a common rail system. This makes the accuracy independent of pressure and velocity differences between the gas creating substances and the melt. 
     The present invention relates to this high pressure technology which is to be adapted for the special condition of the introduction into the melt. The high pressure for injectors in melt introduction processes is needed to overcome the high melt pressure of about 100 to 140 MPa. Pressure of about 200 MPa can be reached by the available injectors with common rail. The continuous supply and the activation of the valves are solved with high reliability today. 
     An essential presupposition for running the injectors is the lubrication by the fuel because gas creating substances (water, alcohol, liquid gas) do not have substantial lubrication effect. The basic idea of the present invention is the use of two circuits applied to the standard injectors available in the market for making additional measures. 
     The JP 8170569 describes a version of injectors for diesel engines using a high pressurized circuit for injection and a low pressurized circuit for the servo hydraulic system. The inventive injector operates by separation of the hydro-electrical activation of the push rod of the valve which uses standard hydraulic oil and the introduction of gas creating substances that occurs at a slightly lower pressure (different from JP 8170569) because of a non return lock pressure that prevents penetration of the melt into the injector. Only the needle and seat of the valve are in touch with the non-lubrication medium. These parts can be made of sintered highly wear resistant material and are easily changeable. The electro-hydraulic servo circuit is not effected because of the separate circuit. 
     Further alternative solutions for the injector are: 
     1) Pump nozzle system with a combination of high pressure piston and spherical valves. 
     2) An electric activated swing system attached to a pump piston. 
     3) Limits for the stroke and positioning of the inlet valve as known for airless spraying systems can be used as well. In some applications, it is an advantage to have a small pressure difference between the introduced material and the melt. For this, the above solution can be used. 
     The regulation and control of the introduction process has the following features. Optionally, the hydraulic circuit can be separated from the gas creating substances to be introduced. The pressure p 1  of the medium to be introduced and the pressure p 2  of the hydraulic system are regulated by a pressure limit valve. The controller regulating the pressure depends on the melt p 3 , for the hydraulic system circuit as well as the injection pressure of the introduced medium. The injector is activated by a solenoid or piezo actuator. The regulation is controlled by an “Arbitrary Wave Form Generator”, known to those skilled in the art. Furthermore, the specification of hydraulic, nozzles, injectors and melt channel are described below. 
     The hydraulics for continuous production for instance extrusion, continuous casting and for part production by injection moulding and die casting are prescribed. The system for continuous production is used for extruders. Continuous charging and multiple injector assembly is preferred. The system for part production is used in injection moulding and die casting systems. Because of the interruption after the injection, a simple solution using a pressure multiplier double cylinder is offered for injection moulding systems. The hydraulic system of existing machines have usually a pressure of 26 MPa that can be used to produce high pressure by a pressure multiplying system. While plastification metal melting, metal/ceramic powder technology takes place, the pressure multiplier for the hydraulic system as well as for the introducing system is loaded with hydraulic oil and gas creating substance respectively. For the dosage of the melt with concrete size and spatially predetermined position it is necessary to achieve a constant pressure difference while injection takes place. A high pressure difference leads to the destroying of the melt. The ramping of the pressure is shown in  FIG. 9 . The injection pressure increases to the nominal pressure during the injection operation. During the injection, the gas creating medium must be introduced by a higher pressure than the melt. The velocity of the melt in the gate of the mould has to be equivalent to the introduction speed of the gas creating medium. For achieving this feature an exact pressure regulation with electrical pressure limit and a precise activation of the hydroelectric valves is necessary. The shaping of the valve, valve seat and the smooth configuration of the melt channel according to hydrodynamic principles is important for repeatable dosage of the melt. The injectors of the “common rail technology” have the capability to fulfill these features. 
     The regulation of the solenoid takes place by controlling with “Arbitrary Wave Form Generator”, opening and locking can be optimized by this system. Furthermore the shape of nozzle and melt channel is described. 
     Examples of Introducing Additives. 
     The present process relates to the modification of the properties (compounding) of an original extruded material by diversion of the main stream into a side stream and introducing additives into this side stream by dosing, mixing and distribution of the original material. The kind of additives determine the properties of the metallic, metal/ceramic powder technology material of the melt. These additives are for instance additional components such as hardeners, dyes, gas processors, softeners, fillers and reinforcements. 
     This process can be applied to inside melt channels of mould for extrusion as well as for injection moulding systems, by means of using at least two diverted streams of melt to reach different properties of the plastic material. Profiles produced by this process have different properties of the material at spatially predetermined positions. This method saves an additional extruder to produce the additional material component. The essential advantage is, that based on the same origin material the waste disposal is not necessary, because based on the same material the recycling results in a unique material. The additives are introduced by nozzle, injector, charging tube, mixing head, porous sinter metal, sliding pump, charger and spraying system. The following concrete application for production of profiles are subsequently shown for instance: 
     i) Aluminum, Metal/ceramic Powder Technology Window Profiles. 
     Sections of the profile close to the outside or inside can be insulated with the present process by using foam filling at the concerned chambers. The calipers as used for the known multiple chamber systems will be adapted with inside channels and with the present described devices. From the main melt stream, diverted material comes to the channel duct within the caliber in which by means of a metering regulation (as there are valve, throttle) the melt is fed to the device for introduction of the additives. Subsequently devices for mixing and homogenizing are placed in the channel to complete the compounding process. Using aluminum, metal/ceramic powder technology for the window profile the additive will be physical gas creators like water, carbon dioxide, alcohol, glycerin, etc. The pressure ramping in the melt duct is decreasing because the additives provide additional gas volume. For expansion of the material, a conical zone is configured according to the volume increase or the velocity increase and the additional volume comes to an expansion zone (conical increasing outlet) so that the compounded material is fed to the outside as solid aluminum, metal/ceramic powder technology profile shells and can be homogenous and adhesively bound together. The advantage of the profiles with multi components comes by the cost effective production and the better properties of the material for heat and sound insulation (low pressure within the foam cells and therefore lower heat transfer rates) and less cost for recycling of the waste material. As a variation, the additives can be introduced by singular dosage leading to a profile with honeycomb shaped cellular structures of high strength. These structures replace the necessary stiffener profiles. 
     ii) Window Profiles Out of Low Melting Metals, Metal/Ceramic Powder Technology. 
     This is as described above but using aluminum, metal/ceramic powder technology 
     iii) Claddings or Panel Shaped Coverings for Outside or Inside Walls. 
     This is simpler than described above. The total extruded profile with foam core and large cell structure can be obtained by one diverted material stream from the main stream to be compounded within the center of the profile. The subsequent process of calibrating and cooling remains the same as before. The so obtained profiles can be used for inside cladding, mobile walls etc. having high stiffness by using large cell striker. 
     iv) Tubes from Low Melting Metals, Powder/ceramic Technology 
     Because of suitable introduction of gas creating and/or fillers, or reinforcement to the melt stream into spatially predetermined locations (as there are intermediate layer, outside layers, etc.), a multi component tube can be produced with simple measures. The device for compounding is attached in between the flanges of extruder and mould and is supplied by the channels of the mould to modify the properties of the material. Another production process with excellent mixing of the melt consists of introducing the additives before the cellular pump. Another improvement can be installed by attaching a mixer or dynamic mixing head for homogenous compounding. 
     v) Coloring of the Outside Layers of the Profiles. 
     The introduction of dyes into the diverted melt channel makes it possible to produce a fast changeable coloring process. The process is most economical, because the expensive dyes are only applied on the outside and no loss of material happens by changing of color because the extruder does not have to be emptied completely. The change of the color comes into force immediately. Further possibilities for cost reduction can be achieved by bringing the coloring to the outside layers only. 
     vi) Production of Sheets, Insulation Sheet Material and Compound Sheets. 
     For systems having a large working width, the additives can be introduced into the center layer of the extruded sheet, or diverted to a melt channel similar to that described before for the device as implemented into the calipers having the total width of the sheet. 
     vii) Apparatus for Adding Up a Extrusion System for Multi Component Process. 
     The apparatus will be attached in between the flanges of the extruder and the mould. Following elements are included:
         1) Inlet cones with diverting device for the melt channels;   2) Pressure and volume metering system;   3) Device for introduction of the additives optional consisting of nozzle, injector, charging pipe, mixing head, porous sinter metal, sliding pump, charger or spraying system (The mixer consist of static mixer, for instance with shafts, pins, diaphragms, helical zones.), and,   4) The expansion zone consists of variable sections, especially for foam components or macro cellular structures in the melt stream.       

     viii) Apparatus for Dosage and Mixing of Additives into Liquid Medium by Using Valve Cone Orifice or Pocket Hole Orifice 
     The invention relates to a multifunctional mixing and dosing head, consisting of a nozzle cone and a nozzle needle, in which the volume flow is metered or blocking the outside flowing medium by the position of the outside nozzle needle and consisting of a nozzle cone and a nozzle needle, in which the volume flow is metered or blocking the inside flowing medium by the position of the inside nozzle needle. 
     This combination of valve, nozzle and injector leads to an economical mixing and dosing directly on the needle top of the concentric double cone. The invention also relates to a hot runner valve, having an injector, for introducing the additives into the outer flowing medium, instead of the valve needle. Several combinations of mixing and dosing heads are mentioned, especially the attachment to plasticizing unit, extruders, melt channel and the subsequent attachment of static mixer systems. 
     The economical benefit consists of the spatially predetermined location of the dosage and the excellent mixing and the exact dosing according to the mixing ratio. Applications for this hot runner valve with integrated mixing head includes introducing additives like dyes, hardener, softener, gas processors, etc. directly into the metallic melt and immediately before the gate of the mould. Besides the several known two component hot runner valves, the present suggested solution has the following features: 
     The application of the concentric positioned nozzle needles within the nozzle needle of this invention can be compared to EP 0310 914, 1987, where a concentric positioned nozzle needle is shown in FIGS. 6.1 to 6.5. The present apparatus is distinguished from the above by using a spatially predetermined dosing of the melt while in EP 0310914 only each of the two media is switched to the mould. The present apparatus can achieve any mixing ratio in between by using the introduction of the additives by pulsation. 
     In U.S. Pat. No. 4,657,496, a hot runner valve for two components is presented with concentric positioned charging tube. By the cavities (9) and (6) within the nozzle needle, depending on the position either the one or the other component is blocked or opened respectively. The concentric shaping of the inside located nozzle makes it possible to regulate the dosing by moving the outside nozzle needle which is controlled by the inner or outer nozzle. A mixing or a fast pulsing introduction as shown by the present apparatus is not a subject of U.S. Pat. No. 4,657,496. 
     The target of the present invention is not only to introduce at least two media in a concentric manner, but also to achieve a mixing, i.e., to dosage the outer medium with the inner medium. 
     In U.S. Pat. No. 5,286,184, a variation of the concentric nozzle is described, which differs from U.S. Pat. No. 4,657,496, in that it discloses the activation of the hollow shaped nozzle needle. Also in this case, there is a concentric introduction, but no mixing or dosage is the target. 
     The nozzle needle is activated by a push rod within the boring of the nozzle needle and is regulated by a servo-mechanic. To reach a spatially predetermined position by the dosage and/or dosing and excellent mixing the usage of a valve cone orifice VCO and a CDI injectors, as it is used in combustion engines, is an advantage. The activation of the injector is known by a hydraulic piston but also can use for the servo-mechanics for instance, solenoid, piezo actuator, hydraulic servo, etc. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention may take form in certain parts and arrangement of parts, preferred embodiments of which will be described in detail and illustrated in the accompanying drawings which form a part hereof and wherein: 
         FIG. 1  is a schematic sectioned view of a valve cone orifice nozzle tip in accordance with the invention; 
         FIG. 2  is a sectioned view similar to  FIG. 1  illustrating a pocket hole orifice; 
         FIG. 3  is an elevation schematic view of a dosing and mixing arrangement; 
         FIG. 4  is a top view of the schematic arrangement illustrated in  FIG. 3 ; 
         FIG. 5  is a schematic cross-sectioned view of a tube shown in  FIG. 3 ; 
         FIG. 6  is a schematically sectioned plan view of a nozzle for producing a cylindrical profile; 
         FIG. 7  is an enlarged schematically sectioned view of one of the nozzles illustrated in  FIG. 6 ; 
         FIG. 8  is a schematic sectioned plan view of an injector fitted to a tube; 
         FIG. 9  is an enlarged view of the injection nozzle/tube arrangement illustrated in  FIG. 8  showing cascade distribution of the injection; 
         FIG. 10  is a schematically sectioned elevation view of an injector in a metal/powder feeding screw in accordance with the invention; 
         FIG. 11  is a schematically sectioned elevation view of an injector positioned in a different part of a metal/powder feeding screw from that shown in  FIG. 10  in accordance with the invention; 
         FIG. 12  is a schematically sectioned elevation view of an injector in a mold gate of a metal/powder feeding screw in accordance with the invention; 
         FIGS. 13 and 14  are schematic representations indicating the nozzle flow pattern; 
         FIG. 15  is a schematic representation of a dosing and mixing arrangement for a combustion system; 
         FIG. 16   a  is a schematic representation of a mold for an extruder; 
         FIG. 16   b  is an orthogonal representation of the mold depicted in  FIG. 16   a;    
         FIGS. 17   a  and  17   b  are views similar to  FIGS. 16   a  and  16   b  respectively; 
         FIG. 18  is a schematic operating diagram for standard injectors used in the present invention; 
         FIG. 19  is a schematic cross-sectional elevation view of a standard conventional injector shown with a pocket hole valve; 
         FIG. 20  is a schematic elevation view of a prior art injector; 
         FIGS. 21 and 22  are views similar to  FIG. 20  showing modifications to the injector in accordance with the invention; 
         FIG. 23  is a schematic elevation view showing a pump nozzle configuration; 
         FIG. 24  is a view similar to  FIG. 23  illustrating an airless spraying system; 
         FIG. 25  is a hydraulic circuit representation for a metal injection molding and die casting system; 
         FIG. 26  is a graph showing melt pressure traces as a function of time; 
         FIGS. 27 ,  28  and  29  are schematic representations of various flowing media channels used with the invention; 
         FIG. 30  is a depiction of several different nozzles designated “a”, “b”, “c”, capable of being used with the invention; 
         FIGS. 31 ,  32  and  33  are also depictions of nozzle configurations with orifice views designated by “b”; 
         FIG. 34  is a schematic elevation view depicting the device compounding a flowing stream; 
         FIG. 35  is a schematic representation of a plan view of the arrangement shown in  FIG. 34 ; 
         FIGS. 36   a  and  36   b  cross-sectioned views of the outlet and inlet, respectively, of the arrangement shown in  FIGS. 34 and 35  illustrating the condition of the flowing media therein; 
         FIGS. 37   a  and  37   b  are schematic view of the outlet and inlet, respectively, of the nozzle disclosed in  FIG. 33 ; 
         FIG. 38  is a schematic elevation view of a flowing media chamber; 
         FIG. 39  is a schematic elevation view of a flowing media chamber similar to  FIG. 38 ; 
         FIGS. 40   a ,  40   b ,  40   c  and  40   d  illustrate various aerosol profile shapes capable of being produced by the subject invention; 
         FIG. 41  is a schematic elevation view of the flowing media channel similar to that shown, for example, in  FIGS. 38 and 39 ; 
         FIG. 42  is an enlarged view of the injector used in the flowing media channel shown in  FIG. 41 ; 
         FIG. 43  is an elevation view of a mixing head valve; 
         FIG. 44  is a view of the orifice of the mixing head valve shown in  FIG. 43  in greater detail with the nozzle/orifice arrangement of the present invention depicted on the right side of the drawing and prior art injector nozzle arrangement shown on the left side of the drawing; 
         FIGS. 45   a ,  45   b  and  45   c  schematically depict, respectively, progressively closing positions of the needle valve used in the subject invention; 
         FIGS. 46   a ,  46   b  and  46   c  represent enlarged views of the orifice/needle shown in  FIGS. 45   a ,  45   b  and  45   c , respectively; 
         FIGS. 47 and 48  are schematic elevation representations of an injector in the mixing head valve; and 
         FIGS. 49 and 50  are elevation schematic cross-sectioned views of the injector applied to specific flowing media channels. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring now to the drawings wherein the showings are for the purpose of illustrating preferred embodiments of the invention and not for the purpose of limiting the same, there is shown in  FIGS. 1 and 2  nozzles, nozzle needles and nozzle seats. The subsequent  FIGS. 3 through 17  show samples for the application of the present method of introduction with exact dosing and homogenous distribution. 
       FIG. 1  shows a valve cone orifice, “VCO” nozzle tip wherein the nozzle needle  1  that closes the needle seat  3  is located in the nozzle body  2 . The small volume of the front chamber  5  is the target of the VCO. The orifices  4  are inclined about 80° to the axis as used in combustion engines. Other orifices  6  shown on the right side of the axis have stepwise inclinations of 0° to 75° inclined to the axis. 
     In  FIG. 2 , a pocket hole orifice is shown. The larger front chamber  8  of the nozzle gives a larger volume of free drops, by means an inexact dosing. The larger chamber gives the possibility of several radial arranged orifices  6  as well as an axial positioned orifice  7 . 
     In  FIG. 3 , an arrangement of a dosing and mixing arrangement for a flowing medium in a tube  10  is shown with five injectors  11  reaching into the tube. The injectors  11  are connected to a high pressure pipeline  12  containing the additive. The tank  14 , the high pressure pump  9 , the common rail  15  and the leakage pipe  13  are shown. 
     In  FIG. 4 , an arrangement of  FIG. 3  is shown from the top view for a extrusion system. The dosing and mixing unit is positioned in the flow direction between the cellular pump  16 , the mixing tube  10  and mixer  10  and the mould  22 . 
       FIG. 5  shows a sectional view of the tube  10  which is enlarged. The five nozzle tips  2  are in a radial 72° pattern arranged. Each nozzle tip has 7 orifices positioned in an angle of 75°, 50°, 25° and 0°, etc. The jet of the injection  18  gives a complete covering of the section of the medium  17 . The length of the jet stream is determined by the diameter of the orifice and is usual between 0.11 mm and 0.14 mm. 
       FIG. 6  shows a mould for an extruder producing a cylindrical profile. Two of the several arranged injectors  11  are shown in the section. The additives  18  are introduced according to the velocity of the medium  17  in the flow direction. 
     In  FIG. 7 , the detail of the nozzle arrangement is shown. The nozzle bodies  2  have at least one orifice  4  in the direction of the melt channel. The jet stream, not the wall sides  10 , is directed to bring the additives into the core  38  of the stream. 
     In  FIG. 8 , an application for a single injector is arranged which is inclined about 45° to the tube axis  10 . The orifice  4  is inclined in a flat slope angle to the medium flow i.e. the orifice is positioned about 40° out of the axis of the injector. The pulsing introduction is giving a cascade distribution shown in  FIG. 9 . 
       FIG. 10  gives applications for injection moulding systems. Similar to  FIGS. 8 and 9 , two injectors  11  introducing the additive with a slight slope in the direction of the axis of the nozzle tip  21  of the melt feeding unit. The location of the injector is after the screw tip  40  but within the front chamber  20  of the barrel  19 . Further excellent mixing, for example of dyes can be had. This arrangement also can be placed within screw sectors within the melt/powder feeding arrangement. 
     For accurate dosing with less mixing, the arrangement of  FIG. 11  takes place. The introduction happens in the center orifice of the melt/powder feeding nozzle tip  21 . This is used for application with hardener and softener (minimum leakage). 
     In  FIG. 12 , the introduction happens by the injector  11  immediately after the mould gate at the inlet of the mould  22 . The advantage of a hot runner system  23  is evident. The mixture of medium and additives does not depend on the melt feeding unit  19  but is determined by the introduction of the additives, i.e., flexible and variable. 
       FIG. 13  shows an airless jet stream  25 . The flowing medium  39  is the streaming side air. The additive is dyes  18 . The pulsation determines the coloring conditions. 
     The nozzle arrangement is shown in  FIG. 14 . At least one orifice  4  in the nozzle body  2  is directed near the axis and determines the spraying structure or pattern  18 . 
       FIG. 15  shows the dosing and mixing arrangement for a combustion system. The nozzle body  2  extends into the combustion chamber  27  and is limited by the casing  28  of the burner zone. The combustion air is compressed by a blower  26  in the casing  28  and the atomizing of the fuel uses the standard arrangement of orifices located on a cone. The injection jet stream  18  results in accurate dosing and mixing of the perfect combustion  29 . 
     In  FIGS. 16   a  and  16   b , the application of a mould for an extruder production of profiles—for instance window profiles—is arranged. The dosing and mixing have the purpose of modifying material diverted from the main stream of the melt for example with gas processors. The section shape is shown in  FIG. 16   b . The injector  11  extends into the side channel  30 . The different material streams  31  are separated by inlet channels, i.e. calipers  32 . The melt stream  17  is injected with additives  18  to create foam in the side stream which is transported to the chambers  33  and  34 . Chambers with solid calipers creating hollow profile space is usual. 
     In  FIGS. 17   a  and  b , the introduction of additives  18  by pulsation into the side channel is shown. The arrangement is also for extrusion systems as in  FIG. 16  as well as for pelletizing and continuous casting with mixing zone  10  applicable.  FIG. 17   a  shows the tube section  30  and the single tube  10 .  FIG. 17   b  shows the lateral section of the tube  30 / 10 . The nozzle body  2  has seven radially arranged orifices  4  and gives full coverage of the material section  17  by the jet streams  18  for dosing and mixing. A sequence of several jet streams  36 ,  37  are introduced in the flow direction as shown in  17   b.    
     In  FIG. 18 , the total apparatus for injectors of standard design is given in the layout. The utilization of pumps  101  and  105  enable the application to be used in a continuous operation (extrusion). The circuit for the additives  103  is separated from the circuit of the hydraulic oil of the servo  104 . The pressure of the circuits is regulated by an electrically activated presser limit valve  102 ,  106 . The valve  112  is released by electro-hydraulic mechanics. The mechanics consists of a solenoid  109 , a spherical valve  108 , and the push rod connected to the high pressure piston  110 . The controller  122  regulates the electro-hydraulic mechanics according to the information  120  given by the operation data as there is injection time/extrusion data  123  according to the pressure sensor in the melt  114 , of the pressure of the additive circuit  102  and the pressure of the hydraulic oil of the servo  106 . 
     The arbitrary wave form generator  120  creates the opening current for the electro mechanism  112 . The introduction of the gas processors  117  into the melt stream  114  happens in the interface  116  part after the extruder tip  160  by a nozzle  113  extending into the channel. For heating, a heater band  159  is located around the nozzle  113 . 
       FIG. 19  shows a standard injector. This version shows a pocket hole valve  113  with a small front chamber. The valve seat  112  isolates the nozzle from the continuous pressurized circuit. 
     The push spring  131  increases the force resulting from the difference of force on the nozzle needle  112  and the hydraulic pressing (bias)  110 . The opening is activated by the solenoid  109  which releases the sphere of the valve  108  and hydraulic oil of the servo is streaming out of the high pressure chamber  110 . 
       FIG. 20  shows an injector of the state of art. The essential features can be readily recognized. The version with the electro-hydraulic activation is extended by throttle  129  and anchor  127  and double chamber. Standard Injectors having separate inlets  126  for the servo supply and the injection supply. 
       FIG. 21  shows a section of a modification of a standard “common rail injector”. The already available two supply borings are attached to a special fitting. 
       FIG. 22  shows the modification of a standard “common rail injector” with a second boring. The supply  132  of the hydraulic servo circuit is blocked by a pin. Additional supply is given by a boring  133  and a second fitting  126  for the servo circuit. 
       FIG. 23  shows a pump-nozzle configuration in principle, by means of the high pressure chamber being close to the location of the nozzle. The medium of the additive is supplied through a boring in the push rod  135  and the pressurizing is effected by an inlet valve  137  and an outlet-valve  139 . The penetration of the melt into the injector is prevented by a sphere  137  which is pressed by a non-return-spring  138  into the valve seat. The push rod  135  is activated by a magnetic swing system  127 . By stroke limit  134  the size of the pulsation is determined. The line for leakage  140  returns the overflowing medium. 
       FIG. 24  shows the principle of an airless spraying state of the art system, applied to the present application by using a valve sphere  139  within the nozzle. The advantage of a small front chamber can be reached by a overlapping  141  of the sphere valve  134 , 135 , 140  as shown in  FIG. 23 . 
       FIG. 25  shows a hydraulic system for part production for instance for injection moulding and die casting systems. The operation of the injector is having a twin circuit system. The pressure multiplier is connected to the basic hydraulic system of the machine  142 . While processing the part there is time to load the system for injection. The pressure multiplier cylinder for the additive  143  and for the servo hydraulic oil  144  are pressurized and being regulated by the pressure limit valve  142  during the melt injection having the pressure p 4 . Subsequently the chambers of the cylinders are refilled by pumps  101  for the additive and pumps  105  for the hydraulic oil. 
       FIG. 26  shows the features of the pressure ramping y-axis in MPa  145  over the duration for the present processing. The melt pressure p 3  is shown by the curve  148 . The pressure of the additive p 1  is shown by curve  146 , the pressure of the servo hydraulic p 2  shown with the line  147 . The electric potential  153  to activate the electro-hydraulic regulation is shown by the curve  149 . Various wave forms can be produced and are shown by way of example as triangle  154 , half sinus waves  155  at different frequencies and full sinus wave form  156  with different frequencies and phases or full sinus form  157  in different frequency or different phases  158  as well as unsymmetrical wave forms, all being produced by an arbitrary wave form generator. 
       FIGS. 27 ,  28  and  29  show several melt channels.  FIG. 27  shows a parallel melt channel  114  with an orifice positioned in the flow direction in an interface part  116  between the mould  162  and nozzle tip  160  of the barrel. This arrangement is applicable for dosage with drops  161  into the melt stream  114 .  FIG. 28  shows a radial multiple orifices  163  facing in the flow and counterflow directions for excellent mixing of the additives with the melt in an enlarged melt channel  114  which causes additional mixing by change of velocity.  FIG. 29  shows a continuous string introduction  164  into the melt channel. These method is able to process axial hollow cavities for extruded profiles. 
     FIGS.  30 , 31  and  32  show a nozzle with various orifices.  FIG. 30  shows state of the art.  FIG. 30   a  shows a VCO valve cone orifice.  FIG. 30   b  shows radial multiple orifices.  FIG. 30   c  shows pocket hole orifices.  FIG. 31  shows a nozzle for flow and counterflow introduction. For introduction of additives as drops into the melt, the nozzle is designed according to hydrodynamic principles. In order to prevent atomizing, sharp edges have to be avoided. The channel profile of  FIG. 31  has smooth profiles in valve cone  170  and at the nozzle profiles  171 .  FIG. 32  shows a nozzle introducing drops sidewise in flow direction.  FIG. 33  shows a nozzle for atomizing in the conical seat  172  and plane seat  173  rectangular to the flow direction. 
       FIG. 34  shows a detail of the device for compounding a melt stream. This version is implemented in calipers  53  of profile moulds  51  or for array assembly for moulds to produce sheets. The section is showing details of  FIGS. 16   a  and  16   b . The view shows the material flow from right to left. The caliber  53  at the inlet side is conical  64  shaped. The inlet is provided with a pressure sensor  63  that is connected to the controller  62  to supply data thereto. 
     The introduction of additives to the medium may be in the flow direction  55   b  or in the counterflow direction  55   a . The advantage of the counterflow is the introduction of individually closed dosages. The introduction may optionally be caused by pulsation. Also, use may be made of chicanes (i.e. obstacles) in the flow of the medium so that the change of velocity leads to shear forces and to additional mixing respectively in the expansion zone  60 . 
       FIG. 35  shows the top view of  FIG. 34  and the relevant reference characters are the same. Note the narrow section in the melt channel. 
     In  FIGS. 36   a  and  36   b , the section of the inlet and outlet is shown related to the device in  FIGS. 34 and 35   FIG. 36   b  shows the inlet in a sectional view. 
       FIGS. 37   a  and  37   b  show the version of the invention as it is in  FIGS. 33   a  and  33   b  but for simple foamed profiles as there are claddings with integrated insulation, panels and tubes. Reference numbers are the same as in  FIG. 33 . 
       FIG. 38  shows a version of melt channel before the distribution chamber of the mould. Two inlet cones  64 ,  65  and the center inlets  66  provide a twin chamber to the melt. 
       FIG. 39  shows a version of melt channel design with central inlet of the side channel and a concentrically (twin) introduction of additives and subsequent merging of the melt at spatially predetermined locations of the profile. The melt channel is crossing the main channel  67  in the center of the surrounded flow. 
       FIG. 40   a  shows a rectangular profile.  FIG. 40   b  shows a circle, tube profile.  FIG. 40   c  shows an elliptical profile and  FIG. 40   d  shows a rounded rectangular profile. Several profile shapes with multiple components are shown for instance in  FIGS. 33 ,  38 ,  39  and  41  as being produced as simple tubular profiles. 
       FIG. 41  illustrates a device with an add on for existing extrusion systems and can be modified for multi-component operation. For reference, the melt channel has a flange  68  and the extruder has a flange  69  between which the interface part  70  for adding on is positioned in the melt channel  71  with through put. 
       FIG. 42  shows the interface part  70  of  FIG. 41  in detail. The interface part  70  is constructed as a disc  70  that is attached between the flanges  68  and  69 . The disc  70  has injectors for introduction of the additives as well as diaphragms  72  to divert the melt channel. The tube  72  with attached planes for the hollow calipers is shown in principle. 
     In  FIGS. 43 to 46 , hot runner valves for metal metal/ceramic powder technology, injection moulding systems are shown. 
     In  FIG. 44 , a device in accordance with the invention is compared to a the state of art device. 
       FIGS. 45A to 45C  show the progressive activation of the needle tip and  FIGS. 46A to 46C  correspond to  FIGS. 45A to 45C , respectively, and show the needle tip in detail. 
       FIG. 47  shows the version of the invention with high frequency pulsing (CDI Injector). 
       FIG. 48  shows the integration of CDI Injectors in the hot runner valve. 
       FIG. 49  shows the arrangement of a mixing and dosing head for example in the melt channel of the metal/powder feeding unit of an injection moulding machine or an extruder. 
       FIG. 50  shows an arrangement of a twin unit in counterflow used for liquid/liquid mixing as well as for extruders with a subsequent static mixer. 
       FIG. 43  shows a device for mixing and dosing and dosage. The inner nozzle needle  82  is activated by the adjusting device  93  and is in the shape of the seat  83  for a pocket hole orifice or a valve cone orifice. This insert also is part of the outer nozzle needle and shaped to be attached to the actuator piston  90  The supply of the additive happens by the boring  85  and is again attached to the interface  91 . The viscous medium is supplied by the channel  89  and passes between the outer nozzle  81  and the supply tube  94 , for instance a hot runner valve a plasticizing unit or a melt channel of an extruder to the final destination. 
     In  FIG. 44 , the nozzle (“Prior Art”) shows the version of a conventional inner nozzle needle as a push rod  84 , as well as the inner nozzle seat, as well as the outer nozzle  94 , or both according to the position of the push rod  84  for opening or locking. The outer nozzle needle is moved and regulated according to the supply of the outer medium. In  FIG. 44  the present device is shown and has a nozzle insert  83  shown as a valve cone (VCO). The orifices of the inner nozzle  83  are completely covered when inside needle  82  is locked. The inner substance is supplied between the nozzle needle  82  and the valve cone orifice  83  and is introduced in the inlet to the outer medium  89 . According to the position of the inner nozzle  82  and the pulsation, the atomizing of the introduced substance  85  into the outer medium  89  occurs. The conical shaped outer nozzle needle  83 , being at the same function for the inner nozzle needle is locking the orifices of the nozzle seat of the hot runner  94  of the feeding unit metal/ceramic powder technology unit  95  or of the melt channel of an  97 , and regulates the opening according to the demanded volume flow and the introduction of the two media  92 . 
     In  FIG. 45A , the open position for introducing the outer medium is shown. The outer nozzle needle  81  is open. The inner nozzle  82  is closed. The substance  85  cannot penetrate. In  FIG. 45B , the inner nozzle needle  82  is open and gives space for the valve cone orifices  83  and the inner substance  85  is introduced to the outer medium  92 . In  FIG. 45C , the inner nozzle needle ( 82 ), as well as the outer nozzle needle ( 83 ) is closed. 
       FIGS. 46A ,  46 B,  46 C correspond to  FIGS. 45A ,  45 B,  45 C but show enlarged details. 
       FIG. 47  shows the combination of a CDI injector  88  in a nozzle seat as cone valve/pocket hole nozzle  87 , having the function of the nozzle needle in the needle seat of the melt channel and closing the valve seat of the hot runner valve  94 . The CDI injector is activated by the position device  93 . The inner nozzle needle is activated by a solenoid/hydraulic or a piezo/hydraulic servo. 
     The supply of the substance happens through the fitting  91 . The melt is supplied by the channel  89 . 
       FIG. 48  shows details of  FIG. 46  and differs by the melt channel  89  attached as a separate insert  87 . 
       FIG. 49  shows the arrangement of a mixing and dosing head  95  inside the nozzle tip of the metal and metal/ceramic powder technology feeding unit  96  of an injection moulding system. The insert  87  extends into the mixing head  95  and the outer nozzle  81  and at the same time as the insert  87  regulates the flow of the melt  89 . 
       FIG. 50  shows the dosing and mixing head  98  in a tube, for instance in a tube as liquid/liquid mixer of a melt channel of an extrusion system  99 . The inserts  87   a ,  87   b  reach into the conical nozzle seat of the mixer and modify the outer nozzle needle  81  according to the position of the volume flow of the melt  89 . The supply happens by a charging device  97  directing the melt into the conical valve seat. The additional mixing occurs by arranging the mixing heads in a counter flow to have counter impact on the media flow. Optionally, this arrangement can have four media which can be mixed together. Optionally, a static mixer can be attached subsequent to the mixing and dosing device. 
     Indexing of Reference Numbers: 
     
       
         
               
               
             
           
               
                   
               
             
             
               
                 1. 
                 Nozzle needle precisely moved 
               
               
                 2. 
                 Nozzle body 
               
               
                 3. 
                 Nozzle needle seat 
               
               
                 4. 
                 Plane plurality of orifice arrangement 
               
               
                 5. 
                 Cavity at valve cone orifice VCO 
               
               
                 6. 
                 Radial plurality of orifice arrangement 
               
               
                 7. 
                 Axial boring in nozzle body 
               
               
                 8. 
                 Cavity at valve sack orifice 
               
               
                 9. 
                 High pressure pump 
               
               
                 10.I 
                 Channel of streaming medium 
               
               
                 11. 
                 Injector 
               
               
                 12. 
                 High pressure piping 
               
               
                 13. 
                 Leakage backflow piping 
               
               
                 14. 
                 Container of additives 
               
               
                 15. 
                 Common rail (communication system) 
               
               
                 16. 
                 Cellular pump 
               
               
                 17. 
                 Streaming medium 
               
               
                 18. 
                 Injection spray stream 
               
               
                 19. 
                 Feeding unit barrel 
               
               
                 20. 
                 Dosing chamber of barrel of injection moulding machines 
               
               
                 21. 
                 Nozzle of barrel 
               
               
                 22. 
                 Mould 
               
               
                 23. 
                 Hot runner nozzle seat 
               
               
                 30. 
                 Inner rod (caliber) of extrusion mould 
               
               
                 31. 
                 Section of extruded profile 
               
               
                 32. 
                 Inner rod (caliber) for hollow section 
               
               
                 33. 
                 Foamed inner section 
               
               
                 34. 
                 Hollow section 
               
               
                 35. 
                 Extruded profile 
               
               
                 36. 
                 Cascade shaped injection 
               
               
                 37. 
                 Radial plurality of orifice arrangement for extrusion 
               
               
                 38. 
                 Core of the mould 
               
               
                 39. 
                 Jet streaming combustion air 
               
               
                 40. 
                 Screw of plasticizing unit 
               
               
                 41. 
                 Expansion zone in the extrusion mould, preferable situated in the 
               
               
                   
                 inner rod of the mould 
               
               
                 51. 
                 Mould for production of profiles by extrusion 
               
               
                 52. 
                 Melt stream, feeding of melt from extruder to the mould 
               
               
                 53. 
                 Caliber inside the melt stream section, implementation for the 
               
               
                   
                 mould to conduct the melt stream, particular with an integrated 
               
               
                   
                 melt channel. 
               
               
                 54. 
                 Injector, nozzle for introducing of additives into the separately 
               
               
                   
                 arranged melt channel. 
               
               
                 55. 
                 Introduction of additives 
               
               
                 55a. 
                 Introduction in flow direction 
               
               
                 55b. 
                 Introduction in counter flow 
               
               
                 56. 
                 Outlet section of separately arranged melt channel. 
               
               
                 57. 
                 Caliber inner rod for forming a hollow section and hollow profile. 
               
               
                 58. 
                 Melt channel with original shaped extruded profile and the 
               
               
                   
                 corresponding section. 
               
               
                 59. 
                 High pressure pump for additives. 
               
               
                 60. 
                 Zone of expansion for the introduced gas creating additives. 
               
               
                 61. 
                 Adjustable section for controlled outflow, chicane for mixing 
               
               
                 621. 
                 Adjustable section for controlled inflow. 
               
               
                 63. 
                 Pressure sensoring cell for the separately arranged melt stream as 
               
               
                   
                 indicator. 
               
               
                 64. 
                 Caliber inner rod with melt channel and inlet opening. 
               
               
                 65. 
                 Tubular inlet section for multiple shell arrangement for extrusion 
               
               
                   
                 profiles. 
               
               
                 66. 
                 Central inlet opening for the inner shell of the extrusion profile. 
               
               
                 67. 
                 Intersecting melt duct, passing through main melt stream. 
               
               
                 68. 
                 Flange of the mould 
               
               
                 69. 
                 Flange of the extruder 
               
               
                 70. 
                 Intermediate add up equipment 
               
               
                 71. 
                 Extension of the melt stream channel 
               
               
                 72. 
                 Intersection through the melt stream channel 
               
               
                 81. 
                 Melt medium nozzle needle outside 
               
               
                 82. 
                 Additive nozzle needle inside 
               
               
                 83. 
                 Coaxial conical needle seat 
               
               
                 84. 
                 Bolt in boring to activate the additive nozzle needle 
               
               
                 85. 
                 Supply of additives to the boring 
               
               
                 86. 
                 Details of mixing and dosing device 
               
               
                 87. 
                 Valve cone orifice, Pocket hole orifice 
               
               
                 88. 
                 Common rail injector (CDI injector) 
               
               
                 89. 
                 Supply channel for melt stream 
               
               
                 90. 
                 Activator piston by hydraulics 
               
               
                 91. 
                 Supply of the additives 
               
               
                 92. 
                 Introduction of additives to the melt 
               
               
                 93. 
                 Servo-mechanics for instance electro/hydraulic, piezo/hydraulic 
               
               
                 94. 
                 Hot runner nozzle seat 
               
               
                 95. 
                 Injection Molding nozzle seat 
               
               
                 96. 
                 Injection Molding feeding unit nozzle 
               
               
                 97. 
                 Extrusion nozzle seat 
               
               
                 98. 
                 Supply device 
               
               
                 99. 
                 Melt channel for extruders 
               
               
                 100. 
                 Statical mixer 
               
               
                 101. 
                 Feeding device for gas creators 
               
               
                 102. 
                 Pressure controller for gas C. p1 
               
               
                 103. 
                 Circuit for gas creator substance 
               
               
                 104. 
                 Hydraulic circuit for activation 
               
               
                 105. 
                 Feeding device for hydraulic circuit 
               
               
                 106. 
                 Pressure control for hydraulic c. p2 
               
               
                 107. 
                 Tank for hydraulic oil 
               
               
                 108. 
                 Spheres for valve 
               
               
                 109. 
                 Solenoid or piezo activator device 
               
               
                 110. 
                 Hydraulic activation of the valve 
               
               
                 111. 
                 Back pressure, seal 
               
               
                 112. 
                 Valve for the injector 
               
               
                 113. 
                 Nozzle of injector 
               
               
                 114. 
                 Gate of the melt stream 
               
               
                 115. 
                 Pressure sensor-cell in melt stream 
               
               
                 116. 
                 Adapting device between the runner 
               
               
                 117. 
                 Introduction of additives to the melt 
               
               
                 118. 
                 Heater band of the adapting device 
               
               
                 119. 
                 Pressure control for additives p3 
               
               
                 120. 
                 Arbitrary Wave Form Generator 
               
               
                 121. 
                 Pressure controller for additives 
               
               
                 122. 
                 Controller 
               
               
                 123. 
                 Interface to metal injection machine, extruder, die-casting 
               
               
                 124. 
                 Pump-nozzle combination 
               
               
                 125. 
                 Leakage piping 
               
               
                 126. 
                 Supply piping for hydraulic 
               
               
                 127. 
                 Anchor for solenoid activation 
               
               
                 128. 
                 Injector 
               
               
                 129. 
                 Throttle valve 
               
               
                 130. 
                 Valve push rod 
               
               
                 131. 
                 Spring for clamping 
               
               
                 132. 
                 Feeder piping for gas creator 
               
               
                 133. 
                 Additional channel for 2 nd  medium 
               
               
                 134. 
                 Stopping device f. stroke limitation 
               
               
                 135. 
                 Pump push rod 
               
               
                 136. 
                 Feeding pipeline valve 
               
               
                 137. 
                 Feeding pipeline for sphere valve 
               
               
                 138. 
                 Reverse motion spring 18 
               
               
                 139. 
                 Backpressure valve on melt end 
               
               
                 140. 
                 Leakage pipeline 
               
               
                 141. 
                 Shrinkage of sphere seat 
               
               
                 142. 
                 Hydraulic system of basic machine 
               
               
                 143. 
                 Pressure multiplier piston additive 
               
               
                 144. 
                 Pressure multiplier piston hydraulics 
               
               
                 145. 
                 Axis for force in MPa 
               
               
                 146. 
                 P1 pressure of additive 
               
               
                 147. 
                 P2 pressure of hydraulic 
               
               
                 148. 
                 P3 pressure of melt 
               
               
                 149. 
                 P5 pressure on control piston 
               
               
                 150. 
                 Axis of time 
               
               
                 151. 
                 Current supply to solenoid 
               
               
                 152. 
                 Center line 
               
               
                 153. 
                 Trapezoid wave shape 
               
               
                 154. 
                 Triangle wave shape 
               
               
                 155. 
                 Half sinus wave 
               
               
                 156. 
                 Full sinus wave 
               
               
                 157. 
                 Periodic wave form 
               
               
                 158. 
                 Unsymmetrical full sinus wave 
               
               
                 159. 
                 Heater band for injector 
               
               
                 160. 
                 Injector 
               
               
                 161. 
                 Introduction in flow direction 
               
               
                 162. 
                 Adaptation to the mould 
               
               
                 163. 
                 Spraying in melt flow/counter melt flow 
               
               
                 164. 
                 Volume enlargement after continuous introducing of additives 
               
               
                 165. 
                 Nozzle body 
               
               
                 166. 
                 Slot shaped nozzle 
               
               
                 167. 
                 Radial shaped nozzle borings 
               
               
                 168. 
                 Valve cone orifice 
               
               
                 169. 
                 Enlarged Laval channel 
               
               
                 170. 
                 Nozzle needle open 
               
               
                 171. 
                 Channel of nozzle 
               
               
                 171. 
                 Valve cone orifice nozzle channel 
               
               
                 172. 
                 Conical nozzle needle, axial spray