Abstract:
A method for making an outlet channel disposes an air spout on a mold corresponding to an inlet gate or an outlet gate of a shaping cavity of an outlet device. An overflow well is disposed corresponding to the outlet or inlet gates of the outlet device. A plastic material is injected into the shaping cavity until the overflow well is filled. During the hardening happens to a part of the plastic material near the shaping cavity wall, the high-pressure nitrogen or liquid is imparted through the air spout, thereby allowing a certain passage formed with the communicated inlet gate and the outlet gate of a body portion of the outlet device to be structured in the plastic material. The part of the plastic material extruded by the high-pressure nitrogen or liquid enters the overflow well. Cooling the entire mechanism allows the outlet device with a certain-shaped passage to be achieved. Thus, a plastic outlet device with a certain-shaped passage is formed, which renews the traditional forming method to promote the integrity of the injecting product, thereby ensuring the pressure-bearing competence as well as prolonging the using life.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a method for making an outlet channel like the faucet or the outlet tap. 
         [0003]    2. Description of the Related Art 
         [0004]    In view of the rising life level, household supplies are increasingly developed with the high quality and the superior feature. At present, the faucet in the house could be formed by multiple types. Especially, the traditional method for making the faucet generally adopts the metal copper to cast a certain passage therein. However, the price of copper is continuingly increased in the recent years. Moreover, the lead contained in the copper readily pollutes the water quality. Thus, many developed countries regulate that the copper for making the faucet must adopt the brass that is lead-free or contains little lead. As a result, the price of such brass is adversely even higher than the conventional copper. 
         [0005]    In order to conquer the high material cost and meet the environmental requirement, some manufacturers adopt the plastic material to make the faucet. Herein, a core-injection could be favorably adopted to form the plastic material into a linear or a regular passage. For forming the inner passage with a certain contour, several segments are to be pieced together (by the ultrasound welding or sliding molding) after they are formed separately; thereby, an outlet device with an inner passage is formed. Wherein, afore inner passage formed by the piecing means should bear a certain degree of water pressure; nevertheless, the piecing force on the segments is in fact unsatisfied. Thus, such piecing means could not assure a long using life of the outlet device. 
       SUMMARY OF THE INVENTION 
       [0006]    The object of the present invention is to employ a plastic material that meets the food safety regulation (NSF 6.1 standard) and is able to bear 100° C. temperature so as to ensure the using life of an outlet device. 
         [0007]    Method for making such outlet channel comprises steps as follows:
   1) a shaping cavity being formed in a first mold corresponding to an surface of a body portion of an outlet device; an air spout being disposed in accordance with an inlet gate or an outlet gate of the outlet device; an overflow aperture being disposed corresponding to the inlet or outlet gates, thereby connecting to an overflow well;   2) a non-toxic melted plastic material capable of bearing 100° C. temperature keeping being injected into the shaping cavity of the first mold until the plastic material filling the shaping cavity and reaching the overflow aperture of an end portion;   3) the high-pressure nitrogen or the high-pressure liquid being imparted through the air spout while part of the melted plastic material near the shaping cavity being hardened, thereby permitting a passage with a certain shape to be formed inside the plastic material to communicate with the inlet and outlet gates of the body portion of the outlet device; a part of the plastic material that is extruded by the high-pressure nitrogen or the high-pressure liquid imparting into the overflow well through the overflow aperture on the end portion;   4) the outlet device with the end portion being drawn after the mechanism being cooled and the first mold being opened; and   5) the outlet device with the certain-shaped passage formed thereby being achieved after removing the end portion from the outlet gate of the body portion.   
 
         [0013]    A spiral fixing block installed at a front portion of the body portion of the outlet device after the step 5) is further mounted into a shaping cavity of a second mold, thereby employing a fixing platen and a fixing post to suspend the body portion of the outlet device in the shaping cavity;
   6) a melted plastic material that could be readily electroplated or sprayed is injected into the shaping cavity of the second mold until the plastic material fills the shaping cavity, thereby forming a hardened case portion out of the body portion;   7) the body portion wrapped in the plastic material and the spiral fixing block are drawn from the shaping cavity after the second mold is opened;   8) the spiral fixing block and the body portion wrapped in the plastic material are separated so as to ream a passage port on the outlet gate at the front portion of the body portion; and   9) the surface of the case portion of the body portion of the outlet device wrapped in the electroplated or sprayed material is further electroplated or sprayed.   
 
         [0018]    The pressure adopted on the high-pressure nitrogen or the high-pressure liquid adopted in step 3) is 150-3000 Bar. 
         [0019]    Method for making an outlet channel including an outlet device adopting an inlet bracket comprises steps of:
   1) an H-shaped shaping cavity for the inlet bracket being disposed inside a mold; an overflow aperture and an overflow well being sequentially disposed out of the shaping cavity; each of two sliding devices including a shaping core being respectively disposed at two correspondent sides of the exterior of the mold; the shape of the two shaping cores at a first sliding device being formed into a shape suitable to the contour of an upper aperture in accordance with the inlet bracket; the exterior at a front portion of the two shaping cores respectively forming a prominent platen suitable to the contour of an inlet passage at a lower portion of the upper aperture in accordance with the inlet bracket; an inner front of one of the shaping cores installing an air pin that penetrates the shaping core; the shape of the two shaping cores of a second sliding device being formed into a shape suitable to the contour of a lower aperture in accordance with the inlet bracket; thereby, closing the mold allowing the two sliding devices to correspondingly move toward the mold, thence permitting the two shaping cores respectively to protrude toward a position corresponding to the upper aperture in accordance with the inlet bracket on the shaping cavity; the two shaping cores on the second sliding device respectively protruding toward a position corresponding to the lower aperture in accordance with the inlet bracket on the shaping cavity; a front face of the prominent platen at the front portion of the two shaping cores on the first sliding device respectively propping against a front face of the correspondent shaping core on the second sliding device;   2) a non-toxic melted plastic material capable of bearing 100° C. temperature being injected into the shaping cavity of the mold until the plastic material filling the shaping cavity being and reaching the overflow aperture;   3) the high-pressure nitrogen being imparted through the air pin while part of the melted plastic material near the shaping cavity being hardened, thereby permitting a passage to be formed inside the plastic material to communicate with two ends of a horizontal pipe on the inlet bracket; a part of the plastic material that is squeezed out by the high-pressure nitrogen imparting into the overflow well through the overflow aperture;   4) opening the mold allowing the two sliding device to move toward the exterior of the mold, thereby permitting the two shaping cores on the first sliding device to be drawn from the mold, and permitting the two shaping cores on the second sliding device to be taken out from the mold, so that a roughcast of the inlet bracket inside the shaping cavity could be extracted; and   5) remnants of the material on the roughcast of the inlet bracket and remnants of the hardened plastic material in the overflow well being removed; the hardened remnants on a blocking wall at the lower portion of each upper aperture on the roughcast of the inlet bracket being cut off, and two ends of the horizontal pipe and the outlet passage corresponding to the upper aperture are able to communicate with each other.   
 
         [0025]    The pressure adopted on the high-pressure nitrogen or the high-pressure liquid adopted in step 3) is 150-3000 Bar. 
         [0026]    Because the outlet device with the certain-shaped passage is extruded by the high-pressure nitrogen or the high-pressure liquid hardening the melted plastic, such certain-shaped passage having the inlet and outlet gates communicating with each other in the body portion of the outlet device could be formed. Namely, while part of the melted plastic is extruded by the high-pressure nitrogen or the high-pressure liquid and enters the overflow well through the overflow aperture at the end portion, a different means for manufacturing the certain-shaped passage in the plastic could be achieved, thereby attaining an integral product and promoting the bearing strength as well as the using life. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]      FIG. 1  is a schematic view showing a body portion of the outlet device being processed in a first mold; 
           [0028]      FIG. 2  is a schematic view showing an outlet portion of the outlet device being air-auxiliarily processed in the first mold; 
           [0029]      FIG. 3  is a cross-sectional view showing a roughcast of the body portion of the outlet device; 
           [0030]      FIG. 4  is a cross-sectional view showing the body portion of the outlet device; 
           [0031]      FIG. 5  is a schematic view showing the body portion of the outlet device being processed in a second mold; 
           [0032]      FIG. 6  is a cross-sectional view showing the outlet device of the present invention; 
           [0033]      FIG. 7  is a perspective view showing the outlet device of the present invention; 
           [0034]      FIG. 8  is a cross-sectional view showing an inlet bracket of the outlet device of the present invention; 
           [0035]      FIG. 9  is a schematic view showing a mold before being injected to form the inlet bracket of the outlet device; 
           [0036]      FIG. 10  is a schematic view showing the mold during being injected to form the inlet bracket of the outlet device; 
           [0037]      FIG. 11  is a schematic view showing the inlet bracket being air-auxiliarily processed; and 
           [0038]      FIG. 12  is a perspective view showing the inlet bracket of the outlet device. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0039]    An outlet device of the present invention is shown in  FIGS. 7 and 8 . 
         [0040]    An outlet portion  500  of the outlet device is made of a non-toxic plastic material capable of bearing 100° C. temperature. A body portion  501  is formed curved including a bulky rear portion  502  and a bulky front portion  503 . The body portion  501  is wrapped in a case portion  509  adopting a plastic material whose surface could be readily electroplated or sprayed. The surface of the case portion  509  is electroplated or sprayed. Wherein, the non-toxic plastic material capable of bearing 100° C. temperature adopts either the Polyphenylene Oxide (PPO), the Polyphenylene sulfide (PPS), the Polyphthalamide (PPA), or the Polysulfone (PSU); the plastic material that is readily electroplated or sprayed adopts either the Acrylonitrile Butadiene Styrene (ABS), the Polycarbonate (PC), or the alloy made of the ABS and the PC. The non-toxic plastic material capable of bearing 100° C. temperature in the following description adopts the PPA. It is noted that while adopting the PPO, the PPS, or the PSU, the present invention could be likely achieved. The plastic material that is readily electroplated or sprayed in the following description adopts the ABS. It is noted that while adopting the Polycarbonate or the alloy made of the ABS and the PC, the present invention could be likely achieved. 
         [0041]    A vertical through hole  504  is defined on the rear portion  502  corresponding to an indentation of the existing horizontal water pipe of the body portion  501 , thereby allowing a control pole on a drain valve of a basin to penetrate therethrough. At a lower surface of the rear portion  502  of the body portion  501 , two spiral holes  508  are respectively disposed on two installing holes correspondingly at the existing horizontal water pipe, thereby permitting a fastener to penetrate the two installing holes so as to fix the outlet portion  500  on the horizontal water pipe. At the lower surface of the rear portion  502  of the body portion  501 , a concave inlet gate  606  is defined correspondingly to a short pipe at the existing horizontal water pipe for linking with the short pipe. At the lower surface of the front portion  503  of the body portion  501 , a concave outlet gate  507  including inner threads on its side wall is defined for linking with the existing outlet cover. Further, a curved channel portion  505  inside the body portion  501  is able to communicate with the inlet gate  506  at the rear portion  502  and the outlet gate  507  at the front portion  503 . 
         [0042]    The process for making abovementioned outlet portion of the outlet device is shown from  FIGS. 1 to 7 : 
         [0043]    Referring to  FIG. 1 , a first fixing mold  410  of a first mold  400  including a clipping device is fixed to a first fixing panel  411 . A fixing inlay  412  is installed inside the first fixing mold  410 . A first movable inlay  421  is installed inside a first movable mold  420 . At the correspondent surfaces of the fixing inlay  412  and the first movable inlay  421 , a first shaping cavity  430  of the body portion  501  along with the bulky rear portion  502  and the front portion  503  is disposed. A first pouring hole  440  is disposed at the place where the first shaping cavity  430  corresponds to the rear portion  502  of the body portion  501 . An air inlet joint  422  and an air inlet passage  423  are disposed on the first movable mold  420  with respect to the rear portion  502  of the body portion  501 . On the first movable inlay  421 , a first core shaft  424  is disposed with respect to the through hole  504  of the rear portion  502  of the body portion  501 . On the first movable inlay  421 , a high pressure sealing ring  425 , an air-auxiliary core  426 , and an air pin  427  are formed with respect to the inlet gate  506  of the rear portion  502  of the body portion  501 . Whereby, the high pressure sealing ring  425  precludes the joint at which the air inlet passage  423  and the air pin  427  meet from the possibility of air leakage. A notch is defined on the first removable inlay  421  with respect to the front portion  503  of the body portion  501  to accommodate a left moving block  450  and a right moving block  460  of a clipping device. At a bottom of the notch, a prominent platen shaped into a conical contour is defined for receiving a spiral core  470  (namely the end portion) with an overflow aperture  471 . Further, an overflow well  480  is defined on the prominent platen  428  of the first movably inlay  421 . 
         [0044]    The spiral core  470  shaped into a conical contour possesses a larger bottom and a smaller top. At the bottom of the spiral core  470 , a depression correspondently shaped into a conical contour is defined for engaging with the prominent platen  428  of the first movable inlay  421 . An exterior of the spiral core  470  has outer threads, thereby fitting with inner threads defined around the side wall of the outlet gate  507  at the front portion  503  of the body portion  501 . A bell-shaped overflow aperture  471  is formed on the top middle of the spiral core  470 . Wherein, the overflow aperture  471  providing with a lower section of its widening portion communicates with the aforementioned depression communicates. 
         [0045]    Thereby, the spiral core  470  is mounted on the prominent platen  428  of the first movable inlay  421  of the first mold  400 . Thereafter, the first movable mold  420  moves toward a first dividing face A for proceeding to a mold closing process. In time of closing the mold, the left moving block  450  and the right moving block  360  move toward a vertical direction with respect to the drawings until the spiral core  470  is tightly clasped. Whereby, the overflow aperture  471  of the spiral core  470  communicates with a place where the first shaping cavity  430  corresponds to the front portion  503  of the body portion  501 . 
         [0046]    Given an action of injecting the melted PPA (hereinafter the modified nylon) into the first shaping cavity  430  on the fixing inlay  412  and the first movable inlay  421  of the first mold  400  through the first pouring hole  440 , the injection should keep working until the melted modified nylon fills the first shaping cavity  430  and reaches the overflow aperture  471  of the spiral core  470 . 
         [0047]    Referring to  FIG. 2 , in time of hardening part of the melted modified nylon near the wall in the first shaping cavity  430 , the injection of high-pressure nitrogen with 150-3000 Bar is imparted to the melted modified nylon in the first shaping cavity  430  through the air inlet joint  422 , the air inlet passage  423 , and the air pin  427 . Thereby, the high-pressure nitrogen extrudes the melted modified nylon in the first shaping cavity  430  to form the curved channel portion  505  that communicates with the inlet gate  506  at the rear portion  502  and the outlet gate  507  at the front portion  503  of the body portion  501 . Accordingly, the extruded melted modified nylon by the high-pressure nitrogen enters the overflow well  480  on the prominent platen  428  of the first movable inlay  421  through the overflow aperture  471  on the spiral core  470 . As it should be, the nitrogen could be replaced by liquid, for example, the high-pressure liquid could similarly assists in the formation of the channel portion  505  instead of nitrogen. 
         [0048]    While the first movable mold  420  moves against the direction with respect to the first dividing face A, the mold could be opened. In time of opening the mold, the left moving block  450  and the right moving block  460  oppositely moves along a vertical direction with respect to the drawings until the spiral core  470  is released. Thereafter, the first movable mold  420  of the first mold  400  is opened to draw the spiral core  470  and the body portion  501 . 
         [0049]    Referring to  FIG. 3 , the spiral core  470  could be rotatively removed from the front portion  503  of the body portion  501 , thereby allowing the hardened modified nylon in the overflow aperture  471  of the spiral core  470  as well as the hardened modified nylon in the overflow well to simultaneously depart from the body portion  501 . Thus, a distinct body portion  501  is achieved as shown in  FIG. 4 . 
         [0050]    As it should be, the arrangement of the spiral core  470  could be requisite for meeting the structure as recited in the aforementioned preferred embodiment. In connection with the structure without the spiral arrangement, the overflow aperture could be directly defined on the inlet gate and the outlet gate for linking with the overflow well. After the injection, the redundant material on the gates is removed, and mechanically process is adopted to maintain a guiding angle as well as a bore diameter on the gates. 
         [0051]    Referring to  FIG. 5 , a second fixing mold  610  of a second mold  600  is fixed to a second fixing panel  611 . A pouring gap  612  is disposed in the second fixing mold  610 . On the second fixing mold  610 , a second core shaft  614  is disposed with respect to the through hole  504  of the rear portion  502  of the body portion  501 . A second movable inlay  621  is disposed in the second movable mold  620 . On the second movable inlay  621 , four first fixing posts  622  are disposed with respect to the lower surface of the rear portion  502  of the body portion  501 . On the second movable inlay  621 , a second fixing post  623  is disposed with respect to the inlet gate  506  of the rear portion  502  of the body portion  501 . On the second movable inlay  621 , an inserting hole is defined with respect to the through hole  504  of the rear portion  502  of the body portion  501  for receiving the free end of the second core shaft  614 . At the middle portion of the inlay  621 , an auxiliary block  624  is placed with an elastic fixing propelling post  625 . On the first movable inlay  421 , a fixing platen  626  is mounted with respect to the front portion  503  of the body portion  501 . Wherein, on an inclined plane at a top of the fixing platen  626 , a prominent platen shaped into a conical contour is disposed for receiving a spiral fixing block  650 . The fixing propelling post  625  protrudes toward the prominent platen on the fixing platen  626 . Two guiding blocks  630  are respectively disposed at two sides of the first movable mold  420  facing to the surface of the second fixing mold  610 . Thereby, the two guiding blocks  630  concurrently restrict the front moving block and the rear moving block  640  to correspondingly move with respect to the vertical direction of the drawings (not shown in  FIG. 5 ). The correspondent surfaces of the front and rear moving blocks  640  respectively installs a main passage  641  and a second shaping cavity  642  with a slightly larger dimension for wrapping the body portion  501 . The entrance of the main passage  641  directs to an adhesive inlet hole  613  of the pouring gap  612  on the second fixing mold  610 . The second pouring hole  643  of the main passage  641  is defined at a place where the second shaping cavity  642  corresponds to the rear portion  502  of the body portion  501 . On the correspondent surface of the front and rear moving blocks  640 , a notch and a spiral fixing block  650  are placed. The notch accommodates the fixing platen  626  on the second movable inlay  621  and the protruding part of the auxiliary block  624 . 
         [0052]    The spiral fixing block  650  is shaped into a conical contour which possesses a larger bottom and a smaller top. At the bottom of the spiral fixing block  650 , a depression correspondingly shaped into a conical contour is defined for engaging with the prominent platen of the fixing platen  626  of the second movable inlay  621 . An exterior of the spiral fixing block  650  has the outer threads, thereby fitting with inner threads defined around the side wall of the outlet gate  507  at the front portion  503  of the body portion  501 . 
         [0053]    At the outlet gate  507  on the front portion  503  of the body portion  501 , the spiral fixing block  650  is placed, thereby permitting the body portion  501  and the spiral fixing block  650  to be put on the second movable inlay  621  of the second mold  600 . On the second movable inlay  621 , the upper surface of the four first fixing posts  623  on the second movable inlay  621  respectively prop against the lower surface of the rear portion  502  of the body portion  501 . On the second movable inlay  621 , the second fixing post  623  inserts into the inlet gate  506  at the rear portion  502  of the body portion  501 . On the second movable inlay  621 , the prominent platen on the top of the fixing platen  626  inserts into the depression at the bottom of the spiral fixing block  650 . The fixing propelling post  625  stretches toward the spiral fixing block  650  for fixing the spiral fixing block  650  on the prominent platen of the fixing platen  626 . 
         [0054]    Moving the second movable mold  620  toward a second dividing face B contributes to a closing mold process. In time of closing the mold, the front and rear moving blocks  640  accordingly move with respect to the vertical direction of the drawings. Whereby, the body portion  501  is suspended within the second shaping cavity  642  by the body portion  501  and the outer threads on the spiral fixing block  650  accommodated by the second shaping cavity  642 , the fixing platen  626  on the second moving inlay  621 , and the four first fixing post  622  as well as the second fixing post  623 . 
         [0055]    The melted ABS is injected into the second shaping cavity  642  by passing from the pouring gap  612  on the second fixing mold  610  of the second mold  600 , then to the main passage  641  on the front and rear moving blocks  640 , and thence through the second pouring hole  643 . While the second shaping cavity  642  is filled up with the melted ABS, a hardening process would be proceeded to accordingly form a case portion  509  out of the body portion  501 . 
         [0056]    Moving the second movable mold  620  against the dividing face B contributes to an opening mold process. In time of opening the mold, the front moving block separates from the rear moving block  640  with respect to the vertical direction of the drawings. Thereafter, the body portion  501  in the case portion  509  wrapped by the ABS and the spiral fixing block  650  depart from the second shaping cavity  642  of the front and rear moving blocks  640 . As a result, the body portion  501  in the case portion  509  wrapped by the ABS and the spiral fixing block  650  are taken out as shown in  FIG. 7 . 
         [0057]    Unscrewing the spiral fixing block  650  allows the separation from the body portion  501  in the case portion  509  wrapped by the ABS. Thereafter, a port on the channel portion  505  on the outlet gate  507  at the front portion  503  of the body portion  501  in the case portion  509  wrapped by the ABS is reamed. 
         [0058]    Accordingly, the case portion  509  wrapped by the ABS is further processed by electroplating or spraying; thereby the outlet channel as shown in  FIG. 7  is achieved. 
         [0059]    Adopting the high-pressure liquid, such as water, achieves the similar manufacturing results on the preferred embodiment as adopting the high-pressure nitrogen, which is herein omitted. 
         [0060]      FIGS. 8 to 12  show the method for making the outlet channel while forming like an inlet bracket: 
         [0061]    Referring to  FIG. 8 , the scope from a first upper portion  111  of a first inlet pipe  11  at the left side of the inlet bracket  10  to a first upper aperture  113  of a first middle portion  112  is employed to accommodate a valve body of the first adjusting valve. On the exterior of the top of the first upper portion  111  of the first inlet pipe  11 , outer threads  116  are disposed for fixing to a first adjusting valve. On the exterior of the bottom of the first upper portion  111  of the first inlet pipe  11 , outer threads  115  are disposed thereon for fixing to a basin. On the bottom of the first upper aperture  113  of the first inlet pipe  11 , a first blocking wall  119  is disposed for dividing the lower part of the first upper aperture  113  into a first inlet passage  117  and a first outlet passage  118 . The first inlet passage  117  communicates with the inlet gate of the first adjusting valve and a first lower aperture  114  at the lower part of the first inlet pipe  11 . The first outlet passage  118  communicates with the outlet gate of the first adjusting valve and the horizontal passage  14  inside the horizontal pipe  13 . At the right side of the inlet bracket  10 , the section between a second upper portion  121  of a second inlet pipe  12  and a second upper aperture  123  of a second middle portion  122  accommodates the valve body of a second adjusting valve  20 . On the exterior of the second upper portion  121  of the second inlet pipe  12 , outer threads  126  are disposed thereon for fastening the second adjusting valve  20 . On the exterior of the lower part of the second inlet pipe  12 , outer threads  125  are disposed thereon for fixing to the basin. At the bottom of the second upper aperture  123  of the second inlet pipe  12 , a second blocking wall  129  is disposed for dividing the lower part of the second upper aperture  123  into a second inlet passage  127  and a second outlet passage  128 . The second inlet passage  127  communicates with an inlet gate of the second adjusting valve and the second lower aperture  124  at the bottom of the second inlet pipe  12 . The second outlet passage  128  communicates with the outlet gate of the second adjusting valve  20  and the horizontal passage  14  inside the horizontal pipe  13 . Wherein, the first inlet pipe  11 , the second inlet pipe  12 , and the horizontal pipe  13  are integrally formed by injecting the plastic material capable of bearing 100° C. temperature, such as PPO, PPS, PPA, or PSU. Afore materials preferably feature non-toxic and great hydrolysising property. The PPO is adopted in the following preferred embodiment. The application adopting the PPS, the PPA, or the PSU similar to the application adopting the PPO is herein omitted. 
         [0062]    Referring to  FIG. 9 , a first sliding device  300  with two first shaping cores  305 ,  305 ′ is disposed at one correspondent side of the exterior of a parallel injecting mold  200 . A second sliding device  100  with two second shaping cores  102 ,  102 ′ is disposed at the other correspondent side of the exterior of the parallel injecting mold  200 . The second shaping cavity  202  with an H-shaped inlet bracket  10  is correspondingly disposed inside the fixing mold and the movable mold of the injecting mold  200 . A main passage  201  and a pouring hole  205  are disposed at an exterior side of a place where the shaping cavity  202  corresponds to the lower side of the middle portion of the horizontal pipe  13  of the inlet bracket  10 . An overflow aperture  103  and an overflow well  104  are sequentially disposed at the correspondent position of the right lower side of the second shaping cavity  102  and the horizontal pipe  13  of the inlet bracket  10 . 
         [0063]    On the first sliding device  300 , an air inlet joint  301  and an air inlet passage  302  are disposed. Moreover, at the left surface of the first sliding device  300  as shown in  FIG. 4 , a high pressure sealing ring  303  is placed around the outlet end of the air inlet passage  302 . 
         [0064]    A pressing plate  304  disposed on the top left of the first sliding device  300  (e.g. the left side of the inlet bracket  10  as shown in  FIG. 8 ) engages with a first shaping core  305  including an air pin  306 . A pressing plate  304 ′ disposed on the bottom left of the first sliding device  300  (e.g. the right side of the inlet bracket  10  as shown in  FIG. 4 ) engages with a first shaping core  305 ′. The shape of the two shaping cores  305 ,  305 ′ at a first sliding device  300  is formed suited to the shape of the upper apertures  113 ,  123  in accordance with the inlet bracket  10 . The two shaping cores  305 ,  305 ′ at the first sliding device  300  arranges respective prominent platens disposed at the outer front side thereof each provided with a shape suitable to the contour of the inlet passages  117 ,  127  of the lower part of the upper apertures  113 ,  123  with respect to the inlet bracket  10 . Wherein, at the front inner of the left shaping core  305 , the air pin  306  penetrating the left shaping core  305  is placed for communicating with the air inlet joint  301  through the air inlet passage  302 . 
         [0065]    A pressing plate  101  on the second sliding device  100  fixes the left shaping core  102  at the upper right side (e.g. the left side of the inlet bracket  10 ) and the right shaping core  102 ′ at the bottom left (e.g. the right side of the inlet bracket  10 ) as shown in  FIG. 8 . The shape of the two shaping cores  102 ,  102 ′ on the second sliding device  100  is formed suited to the shape of the lower apertures  114 ,  124  with respect to the bracket inlet  10 . 
         [0066]    Closing the injecting mold  200  allows the two sliding devices  300 ,  100  to correspondingly move toward the mold  200 . As shown in  FIG. 8 , the first sliding device  300  moves to the left; thereby the left end thereof is able to prop against the right end of the pressing plate  304 . The high pressure sealing ring  303  prevents the air inlet passage  302  and the air pin  306  from leakage. Concurrently, the second sliding device  100  moves rightwards as shown in  FIG. 8 . The shaping cores  305 ,  305 ′ on the first sliding device  300  respectively protrude toward the shaping cavity  202  and the upper aperture  113  (or  123 ) with respect to the inlet bracket  10 . The two shaping cores  102 ,  102 ′ on the second sliding device  100  respectively protrude toward the shaping cavity  202  and the lower aperture  114  (or  124 ) with respect to the inlet bracket  10 . The front end of the front prominent platen of the two shaping cores  305 ,  305 ′ on the first sliding device  300  respectively prop against the front end of the corresponding shaping cores  102 ,  102 ′ on the second sliding device  100 . 
         [0067]    Referring to  FIG. 9 , closing the injecting mold  200  allows the melted PPO to be injected into the shaping cavity  202  of the mold  200  through the pouring hole  205  until the melted PPO fills the shaping cavity  202  and reaches the overflow aperture  203 . 
         [0068]    Referring to  FIG. 10 , the high-pressure nitrogen with 150-3000 Bar is imparted on the melted PPO in the shaping cavity  202  by entering from the air inlet joint  301 , going to the air inlet passage  302 , and thence passing through the air pin  306  on the right shaping core  305  while the melted PPO in the right shaping cavity  202  and the left shaping cavity  202 ′ of the injecting mold  200  having a part thereof near the wall of the shaping cavity of the body portion is hardened. The inner of the melted PPO that is extruded by the high-pressure nitrogen unstops the horizontal passages  14  at two ends of the horizontal pipe  13  on the inlet bracket  10 . Part of afore extruded PPO further enters the overflow well  204  through the overflow aperture  203  for being hardened within the overflow aperture  203  and the overflow well  204 , so that the PPO could be transformed into the PPO remnants  15 ,  16 . The overflow aperture  203  controls the pressure imparted to the melted PPO in the shaping cavity  202  while injecting the high-pressure nitrogen, thereby ensuring the close outer threads  116 ,  115 ,  126 ,  125  to be formed at the exterior of the first inlet pipe  11  and the second inlet pipe  12  on the inlet bracket  10 . 
         [0069]    After the roughcast of the inlet bracket  10  in the shaping cavity  202  inside the parallel injecting mold  200  is cooled and hardened, the injecting mold  200  is opened. Whereby, the first sliding device  300  moves rightwards, and the two shaping cores  305 ,  205 ′ on the first sliding device  300  depart from the injecting mold  200 . Concurrently, the second sliding device  100  moves leftwards, and the two shaping cores  102 ,  102 ′ depart from the injecting mold  200 . Thereafter, the roughcast of the inlet bracket  10  in the shaping cavity  202  is taken out. 
         [0070]    Referring to  FIG. 11 , the hardened PPO remnants  15 ,  16  in the overflow aperture  203  and the overflow well  204  are removed from the roughcast of the inlet bracket  10 . A drill or a mill is applied to cut off the hardened PPO remnants  15  above the lower first blocking wall  119  of the upper aperture  113  at the left side of the roughcast of the inlet bracket  10 . Thereby, the left end of the horizontal pipe  13  and the first outlet passage  118  of the upper aperture  113  are intercommunicated. A drill or a mill is applied to cut off the hardened PPO remnants  15  above the lower second blocking wall  129  of the upper aperture  123  at the right side of the roughcast of the inlet bracket  10 . Thereby, the right end of the horizontal pipe  13  and the second outlet passage  128  of the upper aperture  123  are intercommunicated. As a result, the finished product of the inlet bracket  10  is achieved as shown in  FIG. 12 .