• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A valve-gate mechanism for use in gas injection plastic injection molding systems. A movable pin mechanism is located in the bushing or machine nozzle to coordinate the injection of plastic material into the cavity of the mold. The pin mechanism has an outer pin member and an inner pin member. Movement of the inner fin member relative to the outer fin member allows gas to be injected into the plastic in the cavity of the mold. A spring member, such as a disc spring, biases the inner pin member to the closed position with respect to the outer pin member. The gas pressure from the gas source overcomes the force of the spring member to allow gas to enter the cavity of the mold.
    公开号:KR20030045133A
    申请号:KR10-2003-7005636
    申请日:2001-10-23
    公开日:2003-06-09
    发明作者:세레스트리스탄
    申请人:인코 코오포레이션；
    IPC主号:
    专利说明:

    Gas Valve Pin Mechanism {GAS VALVE PIN MECHANISM}
    [2] Many processes and techniques are currently used for gas injection injection molding. The gas injection injection molding process provides flexibility in the design and manufacture of plastic parts that can form partially hollow, lightweight, and rigid parts, with a minimum of sink marks and distortions. This process enables the reduction of required material and equipment costs and shortening the cycle time, which has advantages over conventional injection molding processes and techniques for many applications.
    [3] In general, gas injection injection molding systems use pressurized gas to expand the plastic material in the mold and fill it in every corner of the mold's space. The gaseous fluid is injected into the mold in various ways such as bushings or machine nozzles in one or more cavities or one or more locations. In a conventional plastic injection molding process, molten plastic material is injected into the cavity of the hollow mold through heated or unheated sprue bushings. Often, two or more spherical bushings attached to a common manifold are used. In this case, the plastic melt that flows out of the injection molding machine through the water flow is distributed to each of the hot water bushings by a heated distributor block (or manifold). One conventional method used to control the flow of the melt uses one or more pin or needle valves known as valve-gate bushings.
    [4] According to this system, the needle valve is inserted into the sputter bushing through the manifold and is controlled for axial movement by a hydraulic, electric or pneumatic control device or mechanism. The needle valve has an elongated fin member adapted to move axially by a control mechanism and fit inside an orifice at the end of the spout bushing to open and close the plastic melt passageway from the spout bushing to the cavity of the mold. A second movable pin member can be located inside the elongated pin member, through the valve mechanism at the ends of the two pin members, the gas allows the plastic to enter the cavity of the mold.
    [1] The present invention relates to a finned valve-gate bushing and nozzle for use in a gas injection injection molding system.
    [9] 1 is a view showing the valve-type bushing mechanism of the present invention.
    [10] FIG. 2 shows the piston and pin mechanism separately from the bushing mechanism of FIG. 1. FIG.
    [11] 3 is an enlarged view in which the pin mechanism of the present invention is in the closed position.
    [12] 4 is a diagram showing that the pin mechanism is set as shown in FIG. 3, but the gas valve member is in an open position so that gas can be injected into the cavity of the mold.
    [13] 5 illustrates an alternative use for the present invention.
    [14] 6 and 7 show the use of the present invention in a mechanical nozzle.
    [5] It is an object of the present invention to provide an improved valve-gate bushing or machine nozzle for use in a gas injection injection molding process. Another object of the present invention is an improved valve-gate bushing with a movable gate pin which deflects into a closed position and uses gas pressure to open the gas orifice and allows gas to flow into the cavity of the mold. To provide a nozzle.
    [6] The present invention provides an improved valve-gate type bushing or nozzle for use in a gas injection system, which satisfies the above object. The present invention provides a pin-type valve-gate device that opens and closes the flow of the plastic material into the mold easily and effectively as desired, and also easily and effectively opens and closes the gas passage into the mold cavity.
    [7] In particular, the movable inner fin member is provided to cooperate with the outer fin member to open and close the gas passage for passage of gas for introducing the plastic material into the cavity of the mold. The inner pin member is biased by the spring washer or in the valve-closed position. When gas is injected into the annular channel between the inner fin member and the outer fin member, the gas acts to overcome the biasing force of the spring washer on the wide surface of the inner fin member to open the gas passageway so that the gas is released from the cavity and plastic material of the mold. To be injected into. The ends of the outer fin member and the inner fin member are paired with each other to form a valve or "gate" for injection of gas into the cavity of the mold.
    [8] The above objects, features, and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings and claims.
    [15] 3 and 4 show a preferred embodiment of the invention, and FIGS. 1, 2, 5, 6 and 7 show the use of the invention in a gas injection injection molding system. In this regard, the present invention is particularly applicable for use in a gas injection injection molding process or system, which will be referred to in this manner below. However, it should be understood that the use of the term "gas" herein is not limited to gas because other fluids may be used instead of gas.
    [16] In addition, the invention is particularly applicable for use with hot water bushings or machine nozzles. In this regard, the present invention has been described herein as being used with one ball bushing 80 (see FIG. 1) and one embodiment of a mechanical nozzle (see FIGS. 6 and 7). Of course, other sizes, shapes, and types of sprues, machine nozzles, and the like can be used with the present invention and meet the spirit and scope of the present invention.
    [17] The valve-gate pin mechanism is indicated generally at 10 in the drawings. As shown in FIGS. 3 and 4, the pin mechanism includes an outer pin member 12 having an elongated passage 13 and an inner pin member 14 located within the elongated hollow passage 13. The outer hollow pin member 12 has an elongated body portion 16 and an enlarged head portion 17. The head portion 17 has a central cavity 18. The inner pin member 14 likewise has an elongated body 20 and an enlarged head 22. Head portion 22 is located within cavity 18. A sealing member 24 is positioned in the annular cavity or groove 25 in the head portion 22 to seal the two head portions 17, 22 together and prevent the passage of gas or other fluid. Alternatively, it should be understood that the sealing member and groove may be located on the wall of the cavity 18 for the same purpose.
    [18] The cap member 30 has an insert 32 positioned over the head 17 and fitted inside the cavity 18. Cap member 30 may be secured to head portion 17 by any conventional manner, such as bolts or other fixtures, or engagement screw mechanism 34.
    [19] A spring member 36 is positioned between the insertion portion 32 and the head portion 22 of the inner pin member. More specifically, the spring member 36 is located between the bottom face 30A of the cap member 30 and the top face 22A of the head portion 22. The spring member is preferably a spring washer member, such as a Belleville washer. Of course, it should be understood that other spring biasing members, such as small coil spring members or the like, may be used instead of the spring washer members, and more than one spring member may be used depending on the amount of biasing force required.
    [20] The lower end 10A of the pin mechanism is adapted to mate with the orifice 40 (or the spout bushing 80 or the machine nozzle 200 described below) of the mold member 42. Orifice 40 mates with mold member 46 and opens into cavity 44. Bottom portion 10A is mated with orifice 40 to form a valve mechanism that controls the flow of plastic material from plastic passageway 48 to the cavity 44 of the mold. Plastic is injected into the passage 48 from a plastic injection molding machine (“IM”) 50 via a conduit.
    [21] Pressurized gas is injected from the gas source 52 ("GAS") through the conduit 53 into the passage in the outer fin member 12. In order to open the valve mechanism 56 to the valve-open position as shown in FIG. 4, pressurized gas from the gas source 52 is injected into the passage 13 to allow the head portion 22 of the inner fin member 14 to be opened. Acts on the surface 22B). When the force of the gas indicated by the arrow 60 in FIG. 4 overcomes the force of the spring member 36 indicated by the arrow 62, the spring member is deformed and flattened so that the inner pin member 14 moves upward in the axial direction. To open the valve mechanism 56.
    [22] If no gas pressure is applied, some plastic pressure in the cavity of the mold or the tap water system will act on the surface on the end of the inner fin member 14. However, the area of the surface 64 is insufficient to provide sufficient force to overcome the force of the spring member 36.
    [23] In summary, when gas pressure is applied to the inside of the pin mechanism 10, a force for lifting the valve pin is formed to pressurize the spring washer 36. Compressing the washer causes the inner fin to retract to provide a passage for gas to escape from the end of the fin.
    [24] An annular groove 66 is provided on the end 12A of the outer pin member 12. This groove allows plastic material to be injected into the cavity 44 of the mold to form a seal that prevents gas injected into the cavity from escaping around the outer surface of the plastic formed within the cavity of the mold. This seal allows the gas to be injected into the plastic mass to form a hollow cavity and the plastic to expand relative to the wall of the mold cavity. The size of the groove 66 is small enough so that a thin flange or flash of plastic can be formed inside the groove so that the plastic forms a satisfactory seal when the gas is forced against the wall of the groove.
    [25] One preferred use of the present invention is shown in FIGS. 1 and 2. As shown, the pin mechanism 10 is combined with the piston member 70 and used in combination with the spout bushing 80.
    [26] The pouring bushing 80 includes a body portion 82, a head portion 84, and an annular heater member 86. The heater element 86 is preferably an annular coil or resistive heating element and is powered through the conduit 88. Heat from the heater member 86 allows the plastic material to remain molten in the central passage 90.
    [27] The sputter bushing 80 is attached to the manifold 92. Manifold 92 has one or more conduits or passages connected to an injection machine (“IM”) 50 that supplies molten plastic material to the passage in a conventional manner. The plastic material in the passageway is kept molten by one or more heating elements (not shown) located in the manifold 92.
    [28] The passageway 94 has an opening 96 that is aligned with the passageway 90 in the mouthpiece bushing so that the plastic material can flow from the injection molding machine into the cavity 44 of the mold located within the mold member 46. The sputter bushing 80 is located in the cavity 98 of the mold member 100.
    [29] The tip member 102 is screwed to the end of the body member 82 of the mouthpiece bushing 80. The tip member 102 has a pair of outer surfaces 104 located in the openings of the mold member 100 and mating. The tip member 102 also has a central orifice 40 mating with the lower end or tip 12A of the outer pin member 12.
    [30] The piston member 70 is located in the cavity 110 of the block member 112. The piston member is adapted to slide axially or longitudinally within the cavity or chamber 110 and is attached to the pin mechanism 10. In particular, the cap member 30 of the pin mechanism 10 is threadedly positioned within the threaded opening or passage 120 of the piston member 70. The threaded engagement between the pin mechanism 10 and the piston member 70 provides a tight coupling between the two parts, while at the same time desired to mate the lower end of the pin mechanism 10 to the orifice 40 as desired. To allow adjustment of the pin member relative to the piston member. In this regard, the axial adjustment of the pin mechanism 10 with respect to the piston member 70 can be made by insertion of an instrument or tool through the central opening 120. A conventional wrench socket or driver slot 122 is provided for the cap member 30 for this purpose.
    [31] The cap member 130 is fixed to the upper end of the block member 112 and keeps the piston member 70 fixed within the cavity 110. Movement of the piston member 70 in the chamber 110 is accomplished by the input and discharge of fluid pressure from the fluid pressure source (“FPS”) 132. The fluid pressure source 132 is in fluid communication with the cavity 110 and connected to respective openings 135 and 137 on the opposite side of the piston member 70 by a conduit 134.
    [32] The plurality of seals or sealing members maintain fluid pressure within the cavity 110. These include the seal 140 between the cap member 130 and the block member 112, the seal 142 between the cap member 130 and the piston member 70, and the wall between the piston 170 and the chamber 110. A pair of seals 144 positioned and a seal 146 positioned between the block member 112 and the piston member 70. These seals are located in annular grooves or cavities to prevent leakage of hydraulic fluid or pneumatic fluid from the fluid pressure source.
    [33] In operation, the piston member 70 is moved axially within the chamber 110 by appropriately applying hydraulic fluid from the FPS through the openings 135, 137. In this regard, the pressure introduced through the conduit 134 and the opening 135 forces the piston member 70 towards the surface 110A of the chamber 110 and again engages the pin mechanism 10 with the orifice 40. Descend to Likewise, when fluid pressure is released from chamber 110 through conduit 134 and fluid pressure is acted through conduit 136, piston member 70 may form a surface (or surface) on cap member 130 within chamber 110. It is moved toward 130A to raise the pin mechanism 10 and open the orifice 40.
    [34] Gas or other predetermined fluid is introduced into the annular passage 13 between the outer fin member 12 and the inner fin member 14 through the conduit 53. In this regard, the operation of the pin mechanism 10 which allows gas input from the gas source 52 to the plastic material P in the mold cavity 44 is the same as described above with reference to FIGS. 3 and 4. Therefore, when gas is supplied from the gas source 52 to the annular passage between the pin members 12 and 14, the spring member 36 is compressed and the inner pin member 14 is directed against the outer pin member 12. It is moved upward in the axial direction to allow gas to flow into the plastic material (P). In the rest or closed position when no gas is supplied to the pin mechanism 10, the spring member 36 provides a biasing force on the inner pin member 14 such that the gas flows through the annular passageway and inside the plastic material. To prevent input.
    [35] In operation of the injection molding system shown in FIGS. 1 and 2, the piston member 70 is moved longitudinally within the block member 112 to open and close the orifice 40 so that the plastic material is removed from the injection molding machine 50. It can be put inside the cavity. In this regard, when the piston member 70 is in the position shown in FIG. 1, the lower end 10A of the pin mechanism 10 rises above the orifice 40 such that the plastic in the passageway 90 is reduced to the cavity 44 of the mold. Allow it to flow inside. When a predetermined amount of plastic material is injected into the cavity of the mold, the fluid source is operated to move the piston member 70 to the position shown in FIG. In this way, the lower end 10A of the pin mechanism 10 is engaged with the orifice 40 so that no plastic material is further introduced into the cavity of the mold. In this regard, the lower end 10A of the pin mechanism 10 and the wall of the orifice 40 form a valve mechanism 56.
    [36] When it is necessary to inject gas or other fluid into the plastic material in the cavity of the mold, the gas is injected from the gas source 52 into the annular passage in the fin mechanism, thereby causing the inner fin member 14 to pass through the outer fin member 12. ) And gas is injected into the plastic material P as described above with reference to FIGS. 3 and 4.
    [37] The gas pressure is maintained to discharge the molded part and also allow the inner pin to be retracted. When the gas pressure is released or the gas is discharged, the inner fins are retracted until the residual pressure in the system sufficiently decreases with the force of the compressed washer to overcome the force generated by the gas. When the inner pin is closed again, the pressure of the residual gas in the part is low enough that it is not damaged when the part is ejected from the mold.
    [38] The block member 112 is separated or spaced from the manifold 92 by a plurality of spacers or risers 99. The block member 112, spacer member 99, manifold 92 and mold member 100 are connected to each other in a conventional manner such as bolts, other fixtures, clamp mechanisms, and the like.
    [39] Another embodiment of the use of the invention is shown in FIG. 5. In this embodiment, gas valve pins are used in single valve-gate applications.
    [40] In FIG. 5, the pin mechanism 10 of the present invention is used in conjunction with a system or mechanism that controls the flow of plastic material into the cavity of the injection mold. In this regard, the plastic material is injected directly from the injection molding machine (“IM”) 50 into the adapter mechanism 150 attached to the sprue bushing 152. Plastic is injected from the injection molding machine 50 through the passage 176 in the adapter member 150 and enters the passage 162 in the mouthpiece bushing 152. The tap bushing 152 is similar to the tap bushing 80 described above with reference to FIG. 1. The mouthpiece bushing 152 has a central body member 154, a head member 156, an annular heating member 158 and a tip member 160. Body member 154 has a central passage 162 that allows plastic material to pass through and into cavity interior 174 of the mold. The sputter bushing 152 is located in the cavity 164 of the mold member 166. The mold member 166 has an opening 170 in which the tip member 160 is located. The mold member 172 includes a cavity 174 positioned in contact with the mold member 166 and into which the plastic material is injected.
    [41] The axial movement of the pin mechanism 10 opens and closes the valve member 56 of the sprue bushing to allow the injection of plastic into the cavity of the mold or to prevent further injection. Movement of the pin mechanism 10 is actuated by the actuation mechanism 180. The actuating member 180 includes a pivotal arm member 182 and a piston mechanism 184. The piston mechanism 184 includes a piston member 186 located in the chamber 188 in the housing 190. Fluid from the fluid pressure source 132 actuates and controls the piston member 186 in the cavity 188. Operation of the piston member 186 again moves the rod member 192 in the direction of arrow 194. Movement of rod member 192 pivots arm member 182 around pivot member 183. One end 182A of the arm member 182 is attached to the upper end 10B of the pin mechanism 10, and the other end 182B of the arm member 182 is connected to the rod member 192.
    [42] The pivoting motion of the arm member 182 acts to cause the pin mechanism 10 to move axially or longitudinally relative to the sprue bushing 152. This in turn opens and closes the valve member 56 to control the injection of the plastic material into the cavity of the mold.
    [43] During operation, movement of the piston member 186 and the rod member 192 moves the end 182B of the arm member 182, which in turn moves the end 182A of the arm member 182 in the opposite direction to pin Allow mechanism 10 to open and close valve mechanism 56. Positioning of the pin mechanism 10 in the formation of the valve mechanism 56 is made by adjusting the length of the rod member 192 relative to the piston member 186. To this end, the rod member 192 is threadedly fixed to the piston member 186 by the spiral 193.
    [44] 6 and 7 illustrate the use of the present invention in a mechanical nozzle. The machine nozzle is a standard part of an injection molding machine. In FIG. 6, the injection molding machine is usually indicated by reference numeral 202. The injection molding machine 202 generally has a pair of platen members 206 and 208 that are used to hold the mold 210 for formation of molded plastic parts on a common base 204. Are located together. Injection molding machine 202 generally includes a body 212, a hopper 214, and a body member 216, along with a mechanical nozzle 200. As shown, the machine nozzle 200 is located on the front end of the torso 216. In this regard, the machine nozzle 200 is generally threadedly inserted on the end of the body member 216 and held by a plurality of helixes 218 as shown in FIG. 7.
    [45] In the injection molding process, plastic pellets are introduced into the central cavity or chamber (not shown) through the hopper member 214 inside the injection molding machine 202. A rotating screw member (not shown) is positioned within the chamber and used to transport the plastic material into the cavity 220 of the mold through the body and the machine nozzle. The plurality of heating members 222 may be located outside the body member 216 and in the main part of the injection molding machine 202 to melt and maintain the molten plastic material and be injected into the cavity of the mold through the machine nozzle. Make sure In this regard, the heating member 224 is also generally located around the outer end of the machine nozzle 200, as shown in FIG. 7. The heating member 224 is generally a coil or resistive heater, in which case it is energized through the leads or connector 226.
    [46] The smoothing member 206 is movable relative to the stationary smoothing member 208. These two smoothing members are connected and movable along the rod member 230. In this regard, generally four rod members 230 are provided.
    [47] The mold 210 generally includes a core member 232 and a cavity member 234. Two mold members 232, 234 are connected with two smoothing members 206, 208, respectively. In this manner, the mold 210 can be opened and closed in accordance with the relative movement of the smoothing member 206 relative to the stationary smoothing member 208.
    [48] The machine nozzle 200 is inserted into the smoothing member 208 through the opening 240 and pressed against the sprue bushing 242 or the like to directly inject the molten plastic material into the cavity 220 of the mold. To this end, the machine nozzle 200 has a tip member 244 having a spherical engagement surface 246 for engaging a spout bushing or the like at the outer or distal end. The tip member 244 is generally screwed to the end of the machine nozzle 200 by a screw mechanism 248.
    [49] The molten plastic material entering the machine nozzle 200 is inserted into the passage 250 at the end 252 and then injected into the cavity of the mold through the orifice 254 of the tip member 244. Passage 250 includes first portion 250A, second portion 250B, and third portion 250C. The first and second portions 250A and 250B of the passage are angled as shown in FIG. 7 to provide space for the actuation mechanism described below. A third portion 250C of the passageway is located at the center of the machine nozzle to allow plastic material to flow around the fin mechanism 10 and enter the tip member 244.
    [50] The pin mechanism 10 is substantially the same as the pin mechanism 10 described above with reference to FIGS. 1 to 5. In this regard, the pin mechanism 10 includes an outer pin member 12 having an elongated passage 13 and an inner pin member 14 located inside the passage 13. The hollow outer pin member 12 has an elongated body 16 and an enlarged head 17. The head portion has a central cavity 18. The inner pin member 14 likewise has an elongated body portion 20 and an enlarged head portion 22 located inside the cavity 18.
    [51] The cap member 30 is positioned on the head portion 17, and the spring member 36 is positioned between the cap member and the head portion 22. The spring member 36 is preferably a spring washer member such as a disc spring, but other equivalent spring biasing members such as those described above may be used.
    [52] The lower end 10A of the pin mechanism is adapted to mate with the orifice 254 of the tip member 244 on the nozzle member 200. Lower portion 10A and orifice 254 form a valve mechanism to control the flow of plastic material from plastic passageway 250 into cavity 220 of the mold.
    [53] Pressurized gas from the gas source 52 (GAS) is introduced into the passage 13 in the outer fin member 12 through the conduit 53. Movement of the inner fin member 14 relative to the outer fin member 12 controls the injection of gas into the cavity 220 of the mold. In this regard, the lower end of the passage 13 is tapered to form a valve mechanism with the lower end of the correspondingly tapered inner pin member 14.
    [54] The pin mechanism 10 operates in the same way as described above. That is, when gas pressure is applied inside the pin mechanism 10, a force for lifting the valve pin is generated and the spring washer 36 is compressed. This causes gas to enter the cavity of the plastic material and mold from the pin mechanism. When the washers are compressed, the inner fins retract to allow passage for gas to flow at the ends of the fins.
    [55] Movement of the pin mechanism 10 is actuated by the actuation mechanism 260. Actuation member 260 includes pivotal arm member 262 and piston mechanism 264. The piston mechanism 264 includes a piston member 266 located in the chamber 264 in the housing 290. Fluid from the fluid pressure source (“FPS”) 292 actuates and controls the piston member 266 within the cavity 268. Operation of the piston member 266 again moves the rod member 294 in the direction of the arrow 296. Movement of rod member 294 pivots arm member 262 around pivot member 263. One end 262A of the pivotal arm member 262 is attached to the upper end 10B of the pin mechanism 10, and the other end 262B of the arm member 262 is connected with the rod member 294. The pivoting action of the arm member 262 acts to move the pin mechanism 10 in the axial or longitudinal direction relative to the machine nozzle 200. This in turn opens and closes orifice 254 to control the injection of plastic material into the cavity of the mold.
    [56] The operation of the pivot member 262 is substantially the same as the operation of the pivotal arm member 182 described above with reference to FIG. 5. In operation, movement of piston member 266 and rod member 294 moves end 262B of arm member 262, which in turn moves end 262A of arm member 262 in the opposite direction, Allow the pin mechanism 10 to open and close the valve mechanism at the orifice 254. Positioning of the pin mechanism 10 in the formation of the valve mechanism is achieved by adjusting the length of the rod member 294 relative to the piston member 266. For this purpose, the rod member 294 is screwed to the piston member 266 by a spiral 295.
    [57] While the invention has been described in terms of one or more embodiments, it is to be understood that the foregoing certain mechanisms and techniques are merely illustrative of the principles of the invention. Various modifications may be made to the invention without departing from the spirit and scope of the invention as defined in the claims.
    权利要求:
    Claims (36)
    [1" claim-type="Currently amended] An outer pin member having an inner passageway, a first body portion, and a first head portion having a cavity therein,
    An inner pin member positioned in the inner passage and having a second body portion and a second head portion located in the cavity;
    A cap member fixed to the first head portion and covering the cavity; and
    A spring member positioned between the second head portion and the cap member and biasing the inner pin member with respect to the outer pin member
    Gas pin mechanism comprising a.
    [2" claim-type="Currently amended] The method of claim 1,
    Said spring member comprises a spring washer.
    [3" claim-type="Currently amended] The method of claim 2,
    Said spring member comprises a Belleville washer member.
    [4" claim-type="Currently amended] The method of claim 1,
    The cap member is screwed securely to the first head portion.
    [5" claim-type="Currently amended] The method of claim 1,
    Said first body portion having a first valve member and said second body portion having a second valve member, said first and second valve members forming a valve mechanism for controlling the flow of fluid material therethrough; .
    [6" claim-type="Currently amended] The method of claim 5,
    Said spring member biasing said valve mechanism to a closed position preventing flow of fluid therethrough.
    [7" claim-type="Currently amended] The method of claim 5,
    And a gas injection opening in the fin mechanism to allow gas to flow in the space between the inner fin member and the outer fin member.
    [8" claim-type="Currently amended] The method of claim 5,
    A gas pin mechanism that opens the valve mechanism by overcoming a biasing force of the spring member by injecting gas into the pin mechanism.
    [9" claim-type="Currently amended] The method of claim 1,
    And a valve-gate bushing, wherein the pin mechanism is positioned within the bushing to control the flow of plastic material therethrough.
    [10" claim-type="Currently amended] The method of claim 9,
    And a movable piston member attached to the pin mechanism to control movement of the pin mechanism within the bushing mechanism.
    [11" claim-type="Currently amended] The method of claim 7, wherein
    Said second head portion having an enlarged surface that is exposed to a gas pressure introduced through said gas injection opening.
    [12" claim-type="Currently amended] A bushing and a gas pin mechanism positioned within the bushing to control the flow of plastic material therethrough, the gas pin mechanism
    An outer pin member having an inner passageway, a first body portion, and a first head portion having a cavity therein,
    An inner pin member positioned in the inner passage and having a second body portion and a second head portion located in the cavity;
    A cap member fixed to the first head portion and covering the cavity; and
    A spring member positioned between the second head portion and the cap member and biasing the inner pin member with respect to the outer pin member
    Valve-gate bushing mechanism comprising a.
    [13" claim-type="Currently amended] The method of claim 12,
    And a movable piston member attached to the pin mechanism to control movement of the pin mechanism within the bushing mechanism.
    [14" claim-type="Currently amended] The method of claim 12,
    And the spring member comprises a spring washer.
    [15" claim-type="Currently amended] The method of claim 14,
    And the spring member comprises a dish spring member.
    [16" claim-type="Currently amended] The method of claim 12,
    And the cap member is threadedly fixed to the first head portion.
    [17" claim-type="Currently amended] The method of claim 12,
    The first body portion has a first valve member and the second body portion has a second valve member, wherein the first and second valve members form a valve mechanism for controlling the flow of fluid material therethrough. Bushing mechanism.
    [18" claim-type="Currently amended] The method of claim 17,
    The spring member biases the valve mechanism to a closed position that prevents flow of fluid therethrough.
    [19" claim-type="Currently amended] The method of claim 17,
    And a gas injection opening in the fin mechanism to allow gas to flow in the space between the inner fin member and the outer fin member.
    [20" claim-type="Currently amended] The method of claim 17,
    A valve-gate bushing mechanism that opens the valve mechanism by overcoming the biasing force of the spring member by injecting gas into the pin mechanism.
    [21" claim-type="Currently amended] The method of claim 19,
    And the second head portion has an enlarged surface that is exposed to a gas pressure introduced through the gas injection opening.
    [22" claim-type="Currently amended] The method of claim 12,
    And an actuation mechanism in communication with the gas pin mechanism for controlling movement of the pin mechanism within the bushing mechanism.
    [23" claim-type="Currently amended] The method of claim 22,
    The actuation mechanism includes a valve arm gate and a piston mechanism.
    [24" claim-type="Currently amended] The method of claim 23, wherein
    And the pivot arm member has a first end connected with the pin mechanism and a second end connected with the piston mechanism.
    [25" claim-type="Currently amended] A mechanical nozzle, and a gas pin mechanism positioned within the machine nozzle to control the flow of plastic material therethrough, the gas pin mechanism
    An outer pin member having an inner passageway, a first body portion, and a first head portion having a cavity,
    An inner pin member positioned in the inner passage and having a second body portion and a second head portion located in the cavity;
    A cap member fixed to the first head portion and covering the cavity; and
    A spring member positioned between the second head portion and the cap member and biasing the inner pin member with respect to the outer pin member
    Valve-gate machine nozzle mechanism comprising a.
    [26" claim-type="Currently amended] The method of claim 25,
    And the spring member comprises a spring washer.
    [27" claim-type="Currently amended] The method of claim 26,
    And the spring member comprises a dish spring member.
    [28" claim-type="Currently amended] The method of claim 25,
    And the cap member is screwed to the first head portion.
    [29" claim-type="Currently amended] The method of claim 25,
    The first body portion has a first valve member and the second body portion has a second valve member, wherein the first and second valve members form a valve mechanism for controlling the flow of fluid material therethrough. Mechanical nozzle mechanism.
    [30" claim-type="Currently amended] The method of claim 29,
    The spring member biases the valve mechanism to a closed position preventing flow of fluid therethrough.
    [31" claim-type="Currently amended] The method of claim 29,
    And a gas injection opening in the fin mechanism to allow gas to flow in the space between the inner fin member and the outer fin member.
    [32" claim-type="Currently amended] The method of claim 29,
    A valve-gate machine nozzle mechanism that opens the valve mechanism by overcoming the biasing force of the spring member by injecting gas into the pin mechanism.
    [33" claim-type="Currently amended] The method of claim 31, wherein
    And the second head portion has an enlarged surface that is exposed to a gas pressure introduced through the gas injection opening.
    [34" claim-type="Currently amended] The method of claim 25,
    And an actuation mechanism in communication with the gas pin mechanism for controlling movement of the pin mechanism within the bushing mechanism.
    [35" claim-type="Currently amended] The method of claim 34, wherein
    The actuation mechanism is a valve-gate machine nozzle mechanism comprising a pivotal arm member and a piston mechanism.
    [36" claim-type="Currently amended] 36. The method of claim 35 wherein
    And the pivot arm member has a first end connected with the pin mechanism and a second end connected with the piston mechanism.
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    同族专利:
    公开号 | 公开日
    WO2002034496B1|2002-08-22|
    WO2002034496A2|2002-05-02|
    JP2004512196A|2004-04-22|
    JP4170755B2|2008-10-22|
    AU3247402A|2002-05-06|
    IL155530A|2006-08-01|
    IL155530D0|2003-11-23|
    EP1337389A2|2003-08-27|
    EP1337389A4|2006-03-08|
    WO2002034496A3|2002-06-20|
    AU2002232474B2|2007-08-09|
    CA2426858C|2007-09-25|
    CA2426858A1|2002-05-02|
    MXPA03003514A|2004-05-04|
    KR100777378B1|2007-11-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2000-10-23|Priority to US69353300A
    2000-10-23|Priority to US09/693,533
    2001-10-23|Application filed by 인코 코오포레이션
    2001-10-23|Priority to PCT/US2001/046060
    2003-06-09|Publication of KR20030045133A
    2007-11-19|Application granted
    2007-11-19|Publication of KR100777378B1
    优先权:
    申请号 | 申请日 | 专利标题
    US69353300A| true| 2000-10-23|2000-10-23|
    US09/693,533|2000-10-23|
    PCT/US2001/046060|WO2002034496A2|2000-10-23|2001-10-23|Gas valve pin mechanism|
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