Abstract:
An exchangeable insert is proposed as auxiliary equipment for a housing of a disintegrating apparatus of an open-end spinning apparatus. The insert is adaptable, so that the disintegrator roll housing can be made to conform to various spinning conditions. In a partial zone, in accord with this proposition, the insert replaces a circumferential wall of the disintegrator roll housing, wherein the insert extends itself into to a zone of a contamination separation opening of the disintegrator roll housing. Its extension in the axial direction is so chosen, that it, at least partially, forms a portion of the circumferential wall of the disintegrator in the area of the contamination separation opening.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention concerns a disintegrator roll housing, whereby an insert is placed in an area, following the feed entry of the band as seen in the direction of rotation of the disintegrating drive shaft and further concerns a procedure for the modernization of an open-end spinning apparatus, whereby an insert of the disintegrator roll housing can be removed and subsequently replaced.  
       BACKGROUND OF THE INVENTION  
       [0002]     Disintegrator roll housings are known in multitudinous designs within the state of the technology, including the spinning units SE7, SE8 and SE9 of a rotor based spinning machine “Autocoro” of W. Schlafhorst AG &amp; Co., 41061 Mönchengladbach, DE. The disintegrator roll housings of these spinning units consist essentially of individual segments, which are placed on a carrier plate. The individual segments, which are set on this carrier plate, thus form the circumferential wall of the distintegrator housing, particularly in the zone between the fiber band feed equipment and the contamination separation opening of the disintegrator roll housing.  
         [0003]     This type of construction of a disintegrator roll housing brings with it the disadvantage that, following the entry of the fiber band by a suction condition, which suction extends itself from the housing of the rotor to that of the disintegrator, a large volume of air is pulled in. That air, which is induced particularly in the area of the contamination separation opening, can only be controlled as to quantity by regulation of the suction of the spinning chamber. This apparatus has, however, the general disadvantage that, in reference to the actually required air, excessive air is continually fed into the disintegrator roll housing. The result of this is that the incoming air itself can lead to difficulties within the disintegrator roll housing. Large cross-sectional openings in the area of the air flow entering the disintegrator roll housing do not yield optimal contamination combing-out and removal conditions. Such excess air leads, for example, to entrained particle dissipation, since the air exits from the disintegrator roll housing in an uncontrolled manner and carries with it fibers, which aggregate in the area of the spinning machine. This action results in disturbances in the operation of the machine.  
         [0004]     An unpublished application DE 102 24 589.4 describes a disintegrator roll housing, wherein the circumferentially disposed wall of the disintegrator roll housing is formed by an exchangeable insert placed between the contamination separation inlet and the exit opening for fibers. Thereby, it is intended that the contamination removal can be effected and made adaptable to various fibers. The disintegrator roll housings in accord with the state of the technology have the disadvantage that the contamination separation can vary as to quantity, however, the known inserts are not designed to bring about a conformation of the disintegrator roll housings to the varying loads. The result of this is that the known disintegrator roll housings cannot be made to suit different fiber materials and other spinning conditions. Further, with the conventional segments, the zone of the contamination separation is not designed, so that the disintegrator rolls are covered, particularly about their edges. Moreover, the size of the contamination separation openings can be changed only insufficiently to meet optimal requirements, and especially the location of the openings in relation to the fiber feed (feed opening in the disintegrator roll housing) cannot be altered.  
       SUMMARY OF THE INVENTION  
       [0005]     Thus, a principal purpose of the present invention is to propose a disintegrator roll housing, which avoids the disadvantages of the state of the technology, as well as to propose an insert, which has the capability of adjusting the disintegrator roll housing during the operation of the disintegrator under different spinning conditions. A further purpose of the present invention is to propose a procedure to modernize the open-end spinning apparatuses, which now adhere to the state of the technology. Various features and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention.  
         [0006]     The present purpose, in accord with the invention, is to be achieved by a disintegrator roll housing having an insert extending itself up to the area of the contaminant separation opening of the disintegrator roll housing. Further, when seen in the axial direction, in relation to the disintegrating roll, the insert forms at least partially the circumferential wall of the disintegrator roll housing in the area of the contamination separation opening. By the use of an invented insert, a disintegrator roll housing, in a simple way, can be made to accommodate itself to various spinning conditions. Further, a disintegrator roll housing now in accord with the state of the technology can be modernized by means of the procedure of the invented procedure.  
         [0007]     The achievement of the invention is such that, the disintegrator roll housing can be designed, so that, in accord with the invention, the input of air into the disintegrator roll housing can be better controlled and further, the position of the inlet on the disintegrator roll housing where the air intake takes place is similarly optimized. Likewise, the air content within the disintegrator roll housing can be essentially improved with the control and positioning. An additional advantage arises in that, with the aid of the invention, existing slots between the disintegrator roll housing and the associated rolls, even in the area of the contamination separation inlet, can be blocked, so that an agglomeration of fibers at the slots can be avoided.  
         [0008]     The invented insert has the advantage of fulfilling the function of the circumferential wall of the disintegrator roll housing, especially in the area of the contamination separation inlet, so that, even here, the edges of the disintegrator roll are covered. As to the circumferential wall of the disintegrator roll housing, only the part of the disintegrating roll is exposed, which is equipped with a processing surface. Advantageously, the disintegrator roll housing, following (in the direction of rotation of the disintegrator shaft) the contamination separation opening, possesses an abutment for the insert, so that the insert can be positioned in that area, where it comes into contact with the remaining components of the disintegrator roll housing.  
         [0009]     In a particularly advantageous design, the disintegrator roll housing possesses a lateral limitation in the area of the contamination separation inlet, while the oppositely situated limitation of the contamination separation inlet is constructed at the insert. In this way, it becomes possible to exchange the insert, or to reset it anew, in the disintegrator roll housing, particularly in the axial direction of the roll. This permits an advantageous opening between the insert and the disintegrator roll housing.  
         [0010]     The lengthening of the combing-out zone for the fiber band is advantageously achieved by a design of the fiber band support at the insert, whereby a joining of the fiber band feed to the disintegrator roll housing is carried out. Thereby, upon the disintegration of the fiber band, the quantity of contaminant is separated, and fiber is improved in its quality, that is to say, that fewer good fibers (in excess of 10 mm) are expelled, while the ejection of lighter contaminant is not adversely affected.  
         [0011]     By the diminishing of the cross-sectional opening of the air intake at the suction point in the area of the contaminant separation, the velocity of the airflow is increased, which leads to a corresponding diminishing of the loss of good fibers. In this way, it is possible to disintegrate even fiber bands comprised of reclaimed material, which possess a high short fiber content and to work the corresponding fibers into yarns of high quality value.  
         [0012]     By means of the invented design of the insert with at least one forked projection arrangement, the achievement attained is that, the circumferential wall of the disintegrator roll housing in the area of the contaminant separation opening can be constructed with the aid of the invented insert. By the formation of the forked insert, at the same time, the size of the contaminant separation agrees exactly in its width with the width of the active surface of the disintegration roll. In this way, the insert can possess two forklike projections, so that the left and the right limitation of the contaminant separation opening is formed by the insert.  
         [0013]     In an additional advantageous design of the invention, the insert incorporates the contaminant separation opening, whereby even the area following the contaminant separation opening (“after” as seen in the direction of the motion of the fibers) can be located on the insert itself. This enables that even this area, for example, in the form of coatings or other geometrical formations can be optimally adapted to various spinning conditions. The area after the contamination separation suffers high abrasion, due to many types of fibers, so that an abrasive wear in this area need not lead to a situation in which the entire disintegration roll housing needs to be replaced. In accord with the invention, it would be sufficient simply to make a replacement with a new insert into the disintegrator roll housing.  
         [0014]     In an especially advantageous development of the invention, the insert possesses rounded off edges in the area of the air inlet at the contamination separation opening, in order that the flow of incoming air, which occurs in this area, is assured of undisturbed flow in the greatest possible manner. It is particularly advantageous, if the insert is placed on the disintegrator roll housing with a capability of being exchanged, especially where fastening means are concerned.  
         [0015]     The fastening means, for example, are in the form of bolt borings or the like. By means of the design, wherein the insert in the area of the contamination separation covers the edges of the disintegrator roll, the advantageous achievement is, that no fibers can migrate in this area too far outside of the surface prepared roll. In the case of a favorable formation, the forklike projections impinge on an abutment, whereby they lie on the disintegrator roll housing. In this way, an exact positioning of the insert is possible.  
         [0016]     An achievement of the invented procedure is that an open-end spinning apparatus conforming to the state of the technology can be reworked in such a manner, so that the apparatus can be modernized Thereby, in the area of the contaminant separation, the open-end spinning apparatus possesses a controllable air inflow, as it does in the area following the feed of the fiber band. Simultaneously, it is possible to bring about positive effects on the quantity of the contaminant separation where the circumferential wall of the disintegrator roll housing is concerned, both before and after the contamination separation opening. Further advantageous embodiments of the invention are described in the subordinate claims or alternate independent claims.  
         [0017]     The present invention is more completely explained with the aid of drawings.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0018]      FIG. 1  shows a sectional presentation in profile of an invented disintegrator roll housing having an inset in accord with the invention;  
         [0019]      FIG. 2  shows a top view of the insert of  FIG. 1  and;  
         [0020]      FIG. 3  shows a top view of an alternatively formed insert in accord with the invention. 
     
    
     DETAILED DESCRIPTION  
       [0021]     Reference will now be made in detail to the presently preferred embodiments of the invention, one or more examples of which are shown in the figures. Each example is provided to explain the invention, and not as a limitation of the invention. In fact, features illustrated or described as part of one embodiment can be used with another embodiment to yield still a further embodiment. It is intended that the present invention cover such modifications and variations.  
         [0022]     The sectional view of  FIG. 1  illustrates a profile view of the invented disintegrator roll housing with an invented insert, wherein the disintegrator roll is absent from its casing. For the mounting of the disintegrator roll, the disintegrator roll housing  1  has a round opening  14 , through which passes, in operational conditions, a shaft, upon which the disintegrator roll is fastened. The disintegrator roll housing  1  has a feed opening  2  through which the fiber band (not shown) to be disintegrated is transported into the disintegrator casing  1  with the help of a feeding shaft  15 . The feeding shaft  15  operates in a conventional manner, coactively functioning with a charging trough  16 . The charging trough  16  confines the fiber band between itself and the feed shaft  15  by means of elastic elements  17 , so that between the fiber band and the feed shaft no slippage occurs and the fiber band can be controllably fed into the disintegrator roll housing  1 .  
         [0023]     For the lateral guidance of the fiber band in the area of the charging trough  16 , this trough  16  possesses two limiting sides, through which the fiber band is guided in the area of the charging trough  16 , as seen in the axial direction of the feed shaft  15 . The direction of rotation of the disintegrator roll is designated by the arrow P. After the area of the limiting sides, the charging trough  16  connects to a still another fiber band support  162 , which, in this area likewise forms a part of the circumferential wall  11  of the disintegrator roll housing  1 . As seen in the direction of rotation P, following the charging trough  16 , the invented insert  5  is connected, which will be discussed later. In accord with each formation of the charging trough  16 , it is possible, at least partially, that the insert  5  can also include the fiber band support  162 .  
         [0024]     After the insert  5 , in the circumferential direction of the arrow P, the disintegrator roll housing  1  has in addition a circumferential wall  11 , which finally transforms into an exit opening  3 , through which, in a known manner, the disengaged fibers are ejected from the disintegrator roll housing  1 , wherein the fibers are conducted to spinning mechanism, for example, an open-end spinning apparatus. The exit opening  3  connects into a fiber feed conduit  31 . Following the exit opening  3 , as seen in the direction of rotation P of the disintegrator roll, the disintegrator roll housing  1  is equipped with the circumferential wall  11 , which extends as far as the band feed opening  2 .  
         [0025]     The insert  5 , which is located between the charging trough  16  and an abutment  41  of the disintegrator roll housing  1 , is exchangeably attached onto the side wall  18  of the disintegrator roll housing  1  by fasteners  6 , which may be bolts or through-pins. In the area between the charging trough  16  and insert  5 , there is to be found a small streamlined slot in the circumferential wall  11  of the disintegrator roll housing  1 , the cross-section of which is regulated by the necessary moveability of the charging trough  16 .  
         [0026]     A contaminant separation opening  4  extends itself, as seen circumferentially, between the contamination separation wall  42  and the limiting wall  43 . This extent is indicated by the lines  44 . Between the two (separate) lines  44 , which represent the length of the contamination separation wall  42  as well as that of the limiting wall  43 , the insert  5  possesses the lateral border  12 , which limits the extent of the contamination separation opening  4  in the axial direction, back to the side wall  18 . Between the side limitation  12  and the opposite limitation  13  (see  FIG. 2 ) as well as between the lines  44 , is to be found the contamination separation opening  4 .  
         [0027]     Thus, the contamination separation opening  4 , in the embodiment of  FIG. 1 , is designed as an opening in the insert  5 , since the insert  5 , both in its circumferential direction as well as in its axial direction, extends itself beyond the contamination separation opening  4  and, to a certain extent, also comprises part of the circumferential wall  11  of the disintegrator roll housing  1 . In the direction of the arrow P, and after the contamination separation opening  4 , the insert  5  possesses a contact surface  53 , which, in the embodiment shown in  FIGS. 1, 2 , is not interrupted in the axial direction. This contact surface  53  strikes the abutment  41  of the disintegrator roll housing  1 .  
         [0028]     Upon an exchange of the insert  5 , it is also possible that a determination can be made of both the size of the contamination separation opening  4  as well as its position in the circumferential direction of the circumferential wall  11  of the disintegrator roll housing  1 , since the contamination separation opening  4  is an integral component of the insert  5 . Principally, because the formation of the disintegrator roll housing  1 , that is to say, its circumferential wall  11 , determines the beginning of the insert  5  in the area of the charging trough  16 , the length of the insert in the circumferential direction finds it limit at the abutment  41  of the circumferential wall  11  of the disintegrator roll housing  1 . Between these two points, the position of the contamination separation opening  4 , as well as its size can be practically optionally determined, that is, made to conform to the existing requirements of spinning-technology.  
         [0029]      FIG. 2  shows a top view of the insert  5  of  FIG. 1  in a view marked by arrow D of  FIG. 1 . When seen in axial direction, it is obvious from  FIG. 2 , that the insert  5  possesses both the lateral limitation  12  as well as the opposite limitation  13  of the contamination separation opening  4 . Consideration can also be given to the fact, that the one lateral limitation  12  could be a part of the side wall  18  (see  FIG. 1 ) of the disintegrator roll housing  1 . A formation of this kind, however, would sharply restrict the flexibility of the insert  5 .  
         [0030]     The lateral limitations  12  and  13  of the contamination separation opening  4  form together a part of the circumferential wall  11  of the disintegrator roll housing  1 . With this arrangement, even in the position of the contamination separation opening  4 , the edge of the disintegrating roll is covered by the circumferential wall  11 . Thereby, only the circumference of the disintegrator roll, which is supplied with an operative surface, lies opposite to the contamination separation opening  4 . In this manner, an improved air inlet in the area of the contamination separation opening  4  is attained, so that contamination can be better separated out and the area of the edge of the disintegrator roll can be kept free of fiber accumulations.  
         [0031]     In  FIG. 2 , a presentation of the fastening means  6  is presented in dotted lines. The insert  5  can be secured to the side wall  18  of the disintegrator roll housing  1  with the aid of these fastening elements  6 . On the left side of the insert, as shown in  FIG. 2 , can be seen the contact surface  53  as well as the outside of the contamination separation wall  42 . The limiting wall  43  is designated as an invisible edge by the use of the dotted lines  431 .  FIG. 2  further makes plain, that the location of the contamination separation opening  4  is more or less freely chosen on the insert  5 . Likewise, the length of the contamination separation opening  4  in its circumferential direction is more or less freely chosen.  
         [0032]      FIG. 3  shows a top view similar to  FIG. 2  of an insert in accord with the invention, whereby, however, the insert  5  does not encompass the contamination separation  4  from all sides. The lateral limitations of the contamination separation  4  take from the insert  5  of  FIG. 3  two forklike extensions  51 , which carry on their ends contact surfaces  53 , with which the insert  5  strikes on the abutment  41  (see  FIG. 1 ) of the circumferential wall  11 . The fastening (not shown) of the insert  5  of  FIG. 3  is carried out in the same manner as in insert  5  of  FIGS. 1 and 2 .  
         [0033]     With the embodiment of the insert  5  shown in  FIG. 3 , the size of the contaminant separation opening is likewise determined. However, its exact position, in particular its position in the circumferential direction, is not exactly optional, since the one limitation of the contaminant separation opening  4  is fixed by means of the abutment  41  of the circumferential wall  11  of the disintegrator roll housing  1 . In many insert cases, however, the residual advantages of the formation of the invented insert  5  in accord with  FIG. 3  are fully sufficient, and permit an advantageous suitability and shaping of the contaminant separation opening  4  of the disintegrator roll housing  1 . Especially where the modernization of the disintegration apparatuses of the machines of the state of the technology is concerned, this embodiment permits a favorable cost and rapid modernization even on machines, which cannot tolerate a stillstand of long duration. In that case, the segment, which forms the circumferential wall of the disintegrator roll housing  1  between the fiber feed opening  2  and the contaminant separation opening  4  is removed and replaced by the insert  5 .  
         [0034]     In order that the intake flow of air in the area of the contaminant separation opening  4  can be held free of turbulence, the edges  52  of the projections  51  of the insert  5  are designed to be rounded off. This formation is also advantageous when applied to the insert  5  in accord with  FIG. 2 .  
         [0035]     It will be appreciated by those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. It is intended that the present invention include such modifications and variations as come within the scope of the appended claims and their equivalents.