WO2010087610A2 - Bague de ventilation, ensemble buse pour machine d'injection, et son procédé de production - Google Patents

Bague de ventilation, ensemble buse pour machine d'injection, et son procédé de production Download PDF

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Publication number
WO2010087610A2
WO2010087610A2 PCT/KR2010/000481 KR2010000481W WO2010087610A2 WO 2010087610 A2 WO2010087610 A2 WO 2010087610A2 KR 2010000481 W KR2010000481 W KR 2010000481W WO 2010087610 A2 WO2010087610 A2 WO 2010087610A2
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WO
WIPO (PCT)
Prior art keywords
vent ring
poppet
nozzle assembly
groove
molten resin
Prior art date
Application number
PCT/KR2010/000481
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English (en)
Korean (ko)
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WO2010087610A3 (fr
Inventor
김종수
Original Assignee
한도철강 주식회사
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Publication of WO2010087610A2 publication Critical patent/WO2010087610A2/fr
Publication of WO2010087610A3 publication Critical patent/WO2010087610A3/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/63—Venting or degassing means

Definitions

  • the present invention relates to a vent ring, a nozzle assembly for an injection molding machine having the same, and a production method thereof. More specifically, the present invention relates to a venting ring for manufacturing a high-quality injection product by smoothly discharging the gas contained in the molten resin moving at high pressure to the outside, an injection machine nozzle assembly having the same, and a production method thereof.
  • Injection molding is a representative method for molding thermoplastics. Injection molding sprays the molten resin into the mold to make the product. Thus, the injection machine is equipped with a nozzle for injecting the molten resin into the mold.
  • the injector nozzle allows the molten resin to be fed to the injection mold while pressing the screw cylinder.
  • Such injection machine nozzles have been proposed through Utility Model Publication No. 1990-4225 (hereinafter referred to as "quoting citation").
  • the present invention has been made to solve the above problems, a vent ring capable of producing a high-quality injection product by effectively extracting the gas contained in the molten resin moving at high pressure, nozzle assembly for injection machine having the same and
  • the purpose is to provide the production method.
  • the first projection protruding in the longitudinal direction on one side outer peripheral surface
  • the second projection protruding in the longitudinal direction on one side inner peripheral surface and the gas formed between the first projection and the second projection It includes a collection space
  • the second protrusion may be formed in the venting micro groove in the radial direction.
  • the depth of the venting microgroove may be in the range of 0.001 mm to 0.02 mm.
  • the vent ring may be divided into a plurality of pieces.
  • the nozzle assembly for an injection molding machine includes a body in which a molten resin passage through which molten resin passes is formed; A head having one end coupled to the body and the other end having an injection hole for injecting molten resin; Poppet inserted in the body, the molten resin is moved to extract the gas contained in the molten resin; And a vent ring fitted into the poppet and discharging the extracted gas.
  • the vent ring may be a vent ring according to an embodiment of the present invention.
  • the vent ring may be provided in plural numbers to be in contact with each other, and the vent ring microgroove may be formed on at least one surface of the vent ring.
  • a first resin moving groove and a second resin moving groove are formed to move the molten resin and to extract the gas contained in the molten resin, and the first resin moving groove is drilled in the head direction.
  • the second resin moving groove may be blocked in the head direction.
  • a venting pedestal may be formed at one side of the poppet, and the venting pedestal may be provided with a connection hole connecting the molten resin passage and the second resin moving groove.
  • the poppet the shaft; A cone coupled to one end of the shaft and having a venting pedestal formed with a connection hole connecting the molten resin passageway and the second resin movement groove; And a plurality of shaft vent rings fitted to the shaft and having the first and second resin moving grooves formed on outer surfaces thereof. It may include.
  • a head vent ring may be inserted into the head, and a head exhaust hole may be formed from an inner circumferential surface of the head to an outer circumferential surface.
  • the nozzle assembly for the injection molding machine according to the second embodiment of the present invention is provided to surround the poppet in the body, and further includes a support cylinder in which a plurality of support grooves are formed, and the vent ring is divided into a plurality of pieces. Each piece may be inserted into the support groove.
  • a venting pedestal is formed at one side of the poppet, and the venting pedestal may be provided with a connection hole for connecting the molten resin passage and the second resin moving groove.
  • a plurality of support cylinder protrusion jaws are formed between the support grooves, and a poppet protrusion jaw is formed between the first and second resin moving grooves, and the support cylinder protrusion jaws and the poppet protrusion jaw alternately by a predetermined distance. Can be spaced apart.
  • the said setting distance is 0.3-0.6 mm.
  • the support groove may have a support groove exhaust hole.
  • At least one poppet groove may be formed in the longitudinal direction to move the molten resin and extract gas contained in the molten resin.
  • the poppet groove may be formed in a straight line.
  • the poppet groove may be formed spirally.
  • the poppet may be formed with at least one bent portion formed by changing the direction of the poppet groove.
  • the bent portion may be formed with a groove (groove) in which the molten resin is accumulated.
  • the vent ring may be sintered.
  • the method for producing a vent ring in the method for producing a vent ring having microgrooves formed on at least one surface for discharging air to the outside, the method of forming the microgrooves by etching, and forming by electric discharge machining It may be formed by any one of the method or the method of forming using a laser.
  • the depth of the micro grooves may be in the range 0.001mm to 0.02mm.
  • the method of forming the microgrooves by etching includes forming a resist layer on the venting ring; Forming a micro pattern on the resist layer; Corroding a portion of the surface of the vent ring; And removing the resist layer; It may include.
  • the micropattern forming method may include optical lithography, imprint lithography, soft etching and injection molding.
  • the method of forming the microgroove using the laser may include processing a groove having a depth set by the laser.
  • the method of forming the microgrooves using the laser may further include applying titanium to the surface.
  • the method of forming the microgrooves using the laser may further include removing foreign substances on the surface by ultrasonic waves.
  • the vent ring may be sintered.
  • the present invention can be discharged through the fine groove formed in the vent ring to improve the quality of the injection product.
  • the molten resin moving at a high pressure is passed from the second resin moving groove to the first resin moving groove to be ejected, thereby spreading the molten resin thinly and evenly, and effectively extracting gas components contained in the molten resin.
  • the extracted gas is discharged to the outside through the gap between the pieces of the vent ring as well as the gap between the vent ring, it is possible to effectively discharge the gas component contained in the molten resin.
  • FIG. 1 is a perspective view showing the disassembled nozzle assembly for an injection molding machine according to the first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a state in which the nozzle assembly for the injection molding machine according to the first embodiment of the present invention is coupled.
  • FIG 3 is a perspective view showing one structure of a poppet used in the nozzle assembly for an injection molding machine according to the first embodiment of the present invention.
  • Figure 4 is an exploded perspective view showing another structure of the poppet used in the nozzle assembly for the injection molding machine according to the first embodiment of the present invention.
  • FIG. 5 is a front view showing an example of a vent ring for use in the nozzle assembly for an injection molding machine according to the first embodiment of the present invention.
  • Figure 6 is an exploded perspective view showing a state in which the nozzle assembly for the injection molding machine according to the second embodiment of the present invention is coupled.
  • FIG. 7 is a cross-sectional view showing a state in which the nozzle assembly for the injection molding machine according to the second embodiment of the present invention is coupled.
  • FIG. 8 is a cross-sectional view taken along the line A-A of FIG.
  • FIG. 9 is a front view of the venting member in the nozzle assembly for an injection molding machine according to the second embodiment of the present invention.
  • FIG. 10 is a front view of the support cylinder in the nozzle assembly for an injection molding machine according to the second embodiment of the present invention.
  • FIG. 11 is a perspective view showing the disassembled nozzle assembly for an injection molding machine according to a third embodiment of the present invention.
  • FIG. 12 is a view showing a modified embodiment of the poppet of the nozzle assembly for the injection molding machine according to the third embodiment of the present invention.
  • Fig. 13 is a view showing another modification of the poppet of the nozzle assembly for the injection molding machine in the third embodiment of the present invention.
  • FIG. 14 is a view for explaining a method for forming a fine groove in the vent ring in accordance with an embodiment of the present invention.
  • 15 is a flowchart illustrating a method of forming microgrooves by etching in a vent ring according to an embodiment of the present invention.
  • 16 and 17 are flowcharts illustrating a method of forming microgrooves in a bent ring by laser processing according to an embodiment of the present invention.
  • FIG. 18 is an enlarged photograph showing that the microgroove is formed by etching the vent ring according to the exemplary embodiment of the present invention.
  • 19 is an enlarged photograph showing a coating other than titanium after forming a micro groove in a vent ring according to an embodiment of the present invention.
  • FIG. 20 is an enlarged photograph showing a titanium coating after forming a micro groove in a vent ring according to an embodiment of the present invention.
  • 21 is a front view showing the configuration of a vent ring used in a conventional nozzle assembly for an injection molding machine.
  • injection port 220 head exhaust hole
  • connection hole 350 connection hole 350
  • 360 cone
  • vent ring 410 head vent ring
  • gas collection space 430 first projection
  • FIG. 1 is a perspective view showing the disassembled nozzle assembly for an injection molding machine according to the first embodiment of the present invention
  • Figure 2 is a cross-sectional view showing a state in which the nozzle assembly for the injection molding machine according to the first embodiment of the present invention is coupled.
  • the nozzle assembly for the injection molding machine is the body 100, the head 200, the poppet 300, and the vent ring (400, 410, 420) ).
  • the body 100 has a cylindrical shape penetrated therein. One end of the body 100 is connected to an injection machine cylinder (not shown) to receive molten resin, and the other end thereof is coupled to the head 200.
  • the molten resin passage 110 is formed inside the body 100. Therefore, the molten resin supplied through one end of the body 100 is supplied to the head 200 through the molten resin passage 110.
  • a vent ring 420 for discharging the gas component included in the molten resin may be inserted into the rear end of the body 100.
  • the body gas discharge passage 120 is formed in the body 100.
  • the body gas discharge passage 120 communicates from the inner circumferential surface to the outer circumferential surface of the body 100.
  • the body gas discharge passage 120 discharges gas components contained in the molten resin to the outside of the body 100.
  • One end of the head 200 is coupled to the body 100, and an injection hole 210 is formed at the other end of the head 200 to eject molten resin into a mold (not shown).
  • the coupling of the body 100 and the head 200 may be a screw coupling. That is, a screw thread may be formed on an outer circumferential surface of one side of the head 200, and a screw thread may be formed on an inner circumferential surface of one side of the body 100 to screw the body 100 and the head 200.
  • the head 200 is configured to gradually reduce the inner diameter from the end portion of the body 100 to the injection hole 210 in order to eject the molten resin having the required diameter.
  • the head 200 may be inserted into the head vent ring 410 for discharging the gas component contained in the molten resin, the head exhaust hole 220 is formed from the inner peripheral surface to the outer peripheral surface to the gas component Discharge to the outside of the head 200.
  • the poppet 300 has cones 350 and 360 formed at both ends thereof, and first and second resin moving grooves 310 and 320 are formed on the outer circumferential surface of the poppet 300 in the longitudinal direction.
  • FIG 3 is a perspective view showing one structure of a poppet used in the nozzle assembly for an injection molding machine according to the first embodiment of the present invention.
  • the poppet 300 As shown in FIG. 3, the poppet 300 according to the exemplary embodiment has cones 350 and 360 integrally formed at both ends thereof, and the venting bearing 330 is formed at one side of the poppet 300. It is formed integrally. A plurality of connection holes 340 are formed in the vent ring support 330.
  • first and second resin moving grooves 310 and 320 are formed in the longitudinal direction, and the first resin moving groove 310 is bored in the head 200 direction.
  • the second resin moving groove 320 is blocked in the head 200 direction.
  • connection hole 340 connects the molten resin passage 110 and the second resin moving groove 320.
  • the molten resin supplied to the molten resin passage 110 moves toward the head 200 through the second resin moving groove 320. Thereafter, the molten resin is limited to its movement by the blocked second resin moving groove 320, and is transferred to the first resin moving groove 310 formed around the resin. In this process, the molten resin is thinly and evenly spread, and gas components contained in the molten resin are effectively extracted.
  • the molten resin is moved to the head 200 along the first resin moving groove 310, and is ejected to the mold through the injection hole 210.
  • Figure 4 is an exploded perspective view showing another structure of the poppet used in the nozzle assembly for the injection molding machine according to the first embodiment of the present invention.
  • the poppet 300 includes an axis 370, cones 350 and 360, and a plurality of axis venting rings 380.
  • Cones 350 and 360 are coupled to both ends of the shaft 370.
  • the cones 350 and 360 may be screwed to the shaft 370.
  • a vent ring pedestal 330 is integrally formed in one cone 360, and a plurality of connection holes 340 are formed in the vent ring pedestal 330.
  • the plurality of shaft vent rings 380 may use a conventional vent ring, and first and second resin moving grooves 310 and 320 are formed on the outer circumferential surface of the shaft vent ring 380, respectively.
  • the plurality of shaft vent rings 380 are fitted to the shaft 370.
  • first resin groove 320 is formed in the shaft vent ring 380 closest to the head 200 side of the shaft vent ring 380. That is, the first and second resin moving grooves 310 and 320 formed in each of the shaft vent rings 380 respectively form moving passages through which the molten resin can move, among which the second resin moving grooves 320 are formed. This moving passage is formed to be blocked in the head 200 direction.
  • connection hole 340 connects the molten resin passage 110 and the second resin moving groove 320.
  • the molten resin moves through the second resin moving groove 320 and then passes to the first resin moving groove 310 to extract gas components. Thereafter, the molten resin is ejected into the mold through the injection port 210 of the head 200.
  • the vent ring 400 is fitted to the poppet 300 and discharges the extracted gas to the outside of the body 100.
  • FIG 5 is a front view showing an example of the vent ring used in the nozzle assembly for the injection molding machine according to the first embodiment of the present invention
  • Figure 21 is a front view showing an example of the vent ring used in the nozzle assembly for a conventional injection molding machine. .
  • the vent ring 400 includes a first protrusion 430, a second protrusion 440, and a gas collection space 405.
  • the first protrusion 430 protrudes in the longitudinal direction on one side outer circumferential surface of the vent ring 400.
  • the second protrusion 440 protrudes in the longitudinal direction on one side inner circumferential surface of the vent ring 400.
  • the gas collection space 405 is formed between the first protrusion 430 and the second protrusion 440.
  • Fine grooves 422 may be formed in the second protrusion 440.
  • the vent rings 400 may be provided in plural numbers to be in contact with each other, and gas components included in the molten resin may be formed by pressure. Collected into the gas collection space 405 through the groove 422.
  • the vent ring 400 may be formed of a plurality of radially divided pieces. There is a fine gap between each piece, through which the gas is released. The number of said pieces can be made into the value desired by those skilled in the art.
  • a gas moving groove 450 is radially formed in the first protrusion 430, and gas is supplied through the gas moving groove 450. Discharged.
  • a gas groove 452 connected to the gas moving groove 450 may be formed on an outer circumferential surface of the first vent ring 400. In this case, since the gas moves through the gas groove 452 and is discharged, the discharge effect may be further increased.
  • the vent ring 400 has a gas movement hole 460 formed from an inner circumference to an outer circumference thereof, and gas is discharged through the gas movement hole 460.
  • fine grooves 724 and 726 are integrally formed from the inner circumferential surface of the vent ring to the outer circumferential surface.
  • This configuration can separate the air and the molten resin, but there is a limit to the work speed, there is a limit to the forced separation of air from the outside.
  • the air may be forcibly extracted using the vacuum pump 600 or the like, and a gap between the gas collection space 405 and the vent ring of FIG. 5A and the gas movement of FIG. 5B may be used.
  • the exhaust gas may be extracted more quickly and efficiently through the groove 450, the gas groove 452 of FIG. 5C, or the gas movement hole 460 of FIG. 5D.
  • the depth of the microgroove 422 may be 0.001 to 0.02 mm as the depth at which the molten resin does not flow out while the molten resin and the gas are separated smoothly.
  • microgrooves 422 and 424 in the vent ring 400 require very precise processing, and the mass production of the venting grooves in which the microgrooves are formed by a conventional metal processing method requires considerable cost and time. .
  • the micro grooves in the nozzle assembly for the injection molding machine according to the embodiment of the present invention may be formed by etching.
  • the microgroove formation using etching is prepared. As shown in FIG. 14A, the vent ring 400 is prepared.
  • a resist layer 610 is formed on the vent ring 400.
  • the material constituting the resist layer 610 may be applied to a variety of commonly used resists such as photoresist or thermosetting resist, it may be formed by a film type or spray coating.
  • a micro pattern is formed on the resist layer 610.
  • the micro pattern formation method may be applied to various methods such as optical lithography, imprint lithography, soft etching, injection molding.
  • the surface of the vent ring 400 is etched by etching to remove the resist layer 610 on the surface of the vent ring 400.
  • the etching may be applied in various ways such as dry etching or wet etching.
  • vent rings 400 may be exposed to a corrosion solution to corrode or exposed to a plasma to form the microgrooves 422 and 424.
  • 15 is a flowchart illustrating a method of forming microgrooves by etching in a vent ring according to an embodiment of the present invention.
  • Forming a resist layer on the vent ring (S110), forming a micro pattern on the resist layer (S120), corroding a portion of the surface of the vent ring (S130) and the The microgrooves 422 and 424 may be formed through the step S140 of removing the resist layer.
  • FIG. 18 is an enlarged photograph illustrating formation of fine grooves by etching in a vent ring according to an exemplary embodiment of the present invention. As shown in the photograph, the molten resin and the gas may be separated and discharged smoothly.
  • vent ring 400 may form the microgrooves 424 through laser processing (light amplification by stimulated emission of radiation).
  • the microgrooves 422 and 424 may be formed by laser processing suitable for precision processing in order to have such precision.
  • 16 and 17 are flowcharts illustrating a method of forming microgrooves in a bent ring by laser processing according to an embodiment of the present invention.
  • the step of polishing the venting surface (S210), the removal of foreign substances on the surface of the venting ring (S220), the step of forming a micro groove by laser processing the venting surface (S231), polishing A fine groove may be formed through a polishing step (S233) and a titanium coating step (S235) on the bent ring surface.
  • the step of removing foreign matters on the surface of the bent ring may be performed in the middle of each step to increase the precision of the bent ring micro grooves regardless of the order shown, the polishing step (S233) It can also be inserted in the middle of the fabrication process.
  • the titanium coating steps S237 and S239 may be roughened before and after the laser processing step S239, which may increase surface precision and prevent corrosion after processing.
  • the step S220 of removing the foreign matter from the surface of the bent ring may be performed in the middle of each step to increase the precision of the bent ring microgroove, and the polishing step S233 may also be performed. It can also be inserted in the middle of the fabrication process.
  • Figure 19 shows the surface corrosion that may occur when coating other than titanium after forming the micro grooves in the vent ring according to the embodiment of the present invention by laser processing, irregularities are generated in the micro grooves to discharge gas from the micro grooves This is not easy.
  • FIG. 20 is an enlarged photograph showing the formation of the microgroove according to the step of FIG. 17 by laser processing the vent ring according to the embodiment of the present invention. Can be.
  • powder metallurgy In some cases, such as the production of small metal parts such as gears for use in small machines, casting requires a great deal of machining, and the use of powder metallurgy can be more economical because of the large amount of metal that is lost. It is also impractical to melt them when making alloys with very high melting points, such as metals such as tungsten, or materials that do not melt together, such as copper and graphite. Powder metallurgy is also used to make porous objects through which liquids or gases can permeate.
  • the vent ring 400 in which the microgrooves 422 are formed may be manufactured using a sintering method.
  • the vent ring 400 When the vent ring 400 is formed by the sintering method, the vent ring 400 may be precisely formed. In addition, when the micro groove 422 is formed, the gas component included in the molten resin may pass through the vent ring 400. It is possible to expect more effective gas emissions.
  • the molten resin supplied to the molten resin passage 110 is supplied to the second resin moving groove 320 through the connection hole 340 and moves along the second resin moving groove 320. However, since the end of the second resin moving groove 320 is blocked, the molten resin is restricted to the movement, and then moves along the first resin moving groove 310 after being transferred to the first resin moving groove 310. In this process, the molten resin is thinly and evenly spread, and the gas component contained in the molten resin is effectively extracted.
  • the extracted gas component is collected in the gas collection space 405 through a gap formed between the vent rings 400.
  • a gap between the pieces constituting the vent ring 400 is also collected in the gas collection space 405. Thereafter, the collected gas is moved to the inner circumferential surface of the body 100 through the gap between the pieces constituting the vent ring 400, and the body through the body gas discharge passage 120 formed in the body 100. It is discharged to the outside of the (100).
  • a nozzle assembly for an injection machine according to a second embodiment of the present invention will be described in detail.
  • the same configuration as that of the nozzle assembly for the injection molding machine according to the first embodiment of the present invention will be omitted from the configuration of the nozzle assembly for the injection molding machine according to the second embodiment of the present invention.
  • FIG. 6 is a perspective view showing the disassembled nozzle assembly for the injection molding machine according to the second embodiment of the present invention
  • Figure 7 is a cross-sectional view showing a combined nozzle assembly for the injection molding machine according to the second embodiment of the present invention
  • 8 is a cross-sectional view taken along line AA of FIG. 7.
  • the nozzle assembly for the injection molding machine according to the second embodiment of the present invention, the body 100, the head 200, the support cylinder 500, the poppet 300, and the vent Ring 470.
  • One end of the body 100 is connected to an injection cylinder (not shown), and the other end is coupled to the head 200.
  • the molten resin passage 110 is formed inside the body 100.
  • One end of the head 200 is coupled to the body 100, and an injection hole 210 is formed at the other end of the head 200.
  • the support cylinder 500 has a cylindrical shape penetrated therein and is inserted into the body 100.
  • the inner circumferential surface of the support cylinder 500 is formed with a plurality of support grooves 510.
  • a support cylinder protrusion jaw 530 is formed between the support grooves 510.
  • the support groove 510 is formed with a support groove exhaust hole 520 to discharge the gas moved to the support groove 510.
  • the poppet 300 has cones 350 and 360 formed at both ends thereof, and first and second resin moving grooves 310 and 320 are formed on the outer circumferential surface of the poppet 300 in the longitudinal direction.
  • a vent ring support 330 is formed at one side of the poppet 300, and a plurality of connection holes 340 are formed in the vent ring support 330.
  • connection hole 340 connects the molten resin passage 110 and the second resin moving groove 320.
  • first resin moving groove 310 is drilled in the direction of the head 200, and the second resin moving groove 320 is blocked in the direction of the head 200.
  • a poppet protruding jaw 390 is formed between the first and second resin moving grooves 310 and 320.
  • the poppet protrusion 390 is alternately spaced apart from the support tube protrusion 530 by a set distance d.
  • the set distance d may be 0.3 to 0.6 mm.
  • the molten resin supplied to the molten resin passage 110 moves toward the head 200 through the second resin moving groove 320. Thereafter, the molten resin is limited to its movement by the blocked second resin moving groove 320. Therefore, the molten resin is transferred to the first resin moving groove 310 through a space between the poppet protrusion 390 and the support tube protrusion 530 spaced apart from each other. In this process, the molten resin is thinly and evenly spread, and gas components contained in the molten resin are effectively extracted.
  • the molten resin is moved to the head 200 along the first resin moving groove 310, and is ejected to the mold through the injection hole 210.
  • the vent ring member 470 is divided into a plurality of pieces, and each piece is inserted into the support groove 510.
  • each piece of the venting member 470 is convexly protruding from the inner circumferential surface, the protruding portion is inserted into a predetermined portion of the first and second resin moving grooves 310 and 320 so that the molten resin is spread evenly. It can move and facilitate the extraction of the gas contained in the molten resin.
  • the vent ring 470 includes a first protrusion 430, a second protrusion 440, and a gas collection space 405.
  • the first protrusion 430 protrudes in a longitudinal direction on one side outer circumferential surface of the vent ring member 470
  • the second protrusion 440 extends in a longitudinal direction on one inner side circumferential surface of the vent ring member 470.
  • the gas collection space 405 is formed between the first protrusion 430 and the second protrusion 440.
  • the nozzle assembly for the injection machine may further include a vacuum pump (see FIG. 5D) to effectively discharge the gas, the vacuum pump is the body gas discharge passage 120 and It is connected.
  • the vacuum pump may be provided outside the body 100 and may be integrally formed with the body 100.
  • the fine groove 428 may be formed in the second protrusion 440.
  • microgroove 428 of the second embodiment of the present invention is the same as the microgroove 422 described in the first embodiment, detailed description thereof will be omitted.
  • a nozzle assembly for an injection molding machine according to a third embodiment of the present invention will be described in detail.
  • the same configuration as that of the nozzle assembly for the injection molding machine according to the first and second embodiments of the present invention among the configuration of the nozzle assembly for the injection molding machine according to the second embodiment of the present invention uses the same reference numerals, and unless otherwise specified, the same configuration is used. The operation is omitted and detailed description is omitted.
  • FIG. 11 is a perspective view showing the disassembled nozzle assembly for an injection molding machine according to a third embodiment of the present invention.
  • the nozzle assembly for the injection molding machine includes a body 100, a head 200, a poppet 301, and a vent ring 400.
  • At least one poppet groove 303 is formed in the longitudinal direction of the poppet 301 to move the molten resin and to extract the gas contained in the molten resin.
  • the poppet groove 303 shown in FIG. 11 is formed in a helical shape, and the molten resin passes and is thinly spread so that gas can be extracted.
  • the configuration of the poppet is simple, so that the production cost can be lowered and a similar effect can be obtained.
  • FIG. 12 is a view showing a modified embodiment of the poppet of the nozzle assembly for the injection molding machine according to the third embodiment of the present invention.
  • the poppet grooves 3031, 3032, and 3033 are formed with at least one bent portion 3030 whose direction is changed. Since the direction of the poppet grooves 3031, 3032, and 3033 is changed before and after the bent portion 3030, the molten resin may spread and the gas may be easily separated.
  • a bent groove 3037 is formed in the bent portion 3030, and the directions of the poppet grooves 3034, 3035 and 3036 are changed before and after the bent groove 3037. Gas can be separated more easily.
  • Figure 13 (a) is a perspective view showing another modified example of the poppet of the nozzle assembly for the injection molding machine according to the third embodiment of the present invention
  • Figure 13 (b) is a line BB of Figure 13 (a) The cross section along the.
  • a plurality of poppet grooves 309 are formed in the poppet 307 in the longitudinal direction.
  • the configuration of the poppet 307 is simpler, which can significantly reduce the production cost.
  • the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne une bague de ventilation qui permet d'évacuer régulièrement un gaz contenu dans une résine fondue s'écoulant, à une pression élevée, vers l'extérieur afin de produire des produits moulés par injection de qualité élevée, un ensemble buse destiné à une machine d'injection comprenant la bague de ventilation et un procédé de fabrication de ladite bague. L'ensemble buse de l'invention comprend une première saillie se dressant dans le sens de la longueur à partir de la surface extérieure de l'un de ses côtés, une seconde saillie se dressant dans le sens de la longueur à partir de l'un de ses côtés, et un espace de collecte de gaz formé entre la première et la seconde saillie, ladite seconde saillie comprenant une micro-rainure de bague de ventilation formée dans une direction radiale.
PCT/KR2010/000481 2009-01-30 2010-01-27 Bague de ventilation, ensemble buse pour machine d'injection, et son procédé de production WO2010087610A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090007569A KR20100088383A (ko) 2009-01-30 2009-01-30 벤트링, 이를 구비한 사출기용 노즐 어셈블리 및 그 생산 방법
KR10-2009-0007569 2009-01-30

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WO2010087610A2 true WO2010087610A2 (fr) 2010-08-05
WO2010087610A3 WO2010087610A3 (fr) 2011-01-27

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