WO2012070709A1 - Dispositif de moulage par injection - Google Patents

Dispositif de moulage par injection Download PDF

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Publication number
WO2012070709A1
WO2012070709A1 PCT/KR2010/008477 KR2010008477W WO2012070709A1 WO 2012070709 A1 WO2012070709 A1 WO 2012070709A1 KR 2010008477 W KR2010008477 W KR 2010008477W WO 2012070709 A1 WO2012070709 A1 WO 2012070709A1
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WO
WIPO (PCT)
Prior art keywords
air
air discharge
core
injection mold
molten resin
Prior art date
Application number
PCT/KR2010/008477
Other languages
English (en)
Korean (ko)
Inventor
오승아
Original Assignee
지엘하이테크(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 지엘하이테크(주) filed Critical 지엘하이테크(주)
Publication of WO2012070709A1 publication Critical patent/WO2012070709A1/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
    • B29C45/26—Moulds
    • B29C45/34—Moulds having venting means

Definitions

  • the present invention injects and discharges the air inside the core of an injection mold for molding an injection product by injecting a liquid resin before or after the resin injection, and at the same time, installs an automatic resin injection device at the resin inlet through which the resin is injected to melt the melt.
  • the present invention relates to an injection mold apparatus capable of making resin injection stable and intimate.
  • the injected molding material flows into the cavity inside the mold.
  • the molding material injected by the piston flows into the mold through the sprue, and flows toward each cavity through the runner which is the decomposition flow path of the molding material, and thus flows along the runner.
  • the molding material is injected into each cavity through the gate formed at the end of the runner.
  • FIG. 1 is a cross-sectional view of a mold showing a cavity according to the prior art.
  • the sprue 11 into which the molding material 10 is injected is perpendicular to the runner 12, and the runner 12 and the gate 13 are also perpendicular to each other.
  • high pressure is generated at a portion where the sprue 11 and the runner 12 cross each other.
  • the shape of the sprue 11 is made into a conical shape gradually wider in cross section toward the bottom as shown in FIG. do. Accordingly, when the molding material 10 is injected from the upper end of the sprue 11, the lower end of the sprue 11 is widened so that the pressure applied to the lower end of the sprue 11, that is, the intersection with the runner 12, is increased. Can be reduced.
  • the sprue cross section at the intersection of the sprue and the runner becomes wider and the quantity of the molding material increases.
  • the unit cost is increased due to the increase in the amount of the molding material, the thickness is thick, the cooling rate is lowered, the injection speed is lowered, thereby lowering the productivity.
  • a vacuum injection mold gas discharge device (registered patent No. 10-0740539) is provided, and looking at its configuration, it is connected to the cavity of the injection mold 20 into which the resin melt flows, and an inlet 21 for sucking the injection gas. Is formed, a venturi tube having an inlet connected to one side is formed therein, a vacuum generating unit A having an inlet 22 and an outlet 23 of air formed at both sides of the venturi tube, and an inlet of the vacuum generating unit.
  • the gas discharge device of the conventional vacuum injection mold having the configuration as described above is a complicated structure of the mold, the suction and discharge of the injection gas is not easily made, and the process of precisely supplying and blocking the resin melt There is this esoteric problem.
  • the present invention has been invented to solve the above problems, the object of which is that when the molten resin is supplied into the core of the injection mold, the supply is made easily, and the air and the gas in the core can be easily discharged so that the inside of the core
  • the present invention provides an injection mold apparatus that can reduce the material cost and produce a molded article molded without defects and bonding.
  • the molten resin is provided on the side of the injection mold 100 is provided with a core 130 for producing a molded article is supplied between the upper and lower plates (110.120)
  • a molten resin inlet 140 is formed to be injected device 200 is installed and the air outlet 150 is formed on the other side of the injection mold 100
  • Each valve B is installed at the molten resin inlet 140, and the air discharge unit 300 is installed at the air outlet 150 to discharge air and gas inside the core 130, and the air discharge is performed.
  • One side of the means 300 is composed of a moving means 400 for moving forward / backward the air discharge means 300 is installed.
  • the air discharge means 300 is provided with an air discharge pipe 310 in which the air discharge path 320 is formed in the inner center, the front end of the air discharge pipe 310 is formed with a funnel-shaped stopper 330 is On the rear air discharge pipe 310 of the stopper 330, an air suction port 340 is formed which is connected to the air discharge path 320 and selectively communicates with the inside of the core 130.
  • the moving means 400 for forwarding / reversing the air discharge means 300 is provided with a second magnetic body 420 wound around the coil at the same time as the magnetic supply at the outside of the air discharge pipe 310,
  • the first magnetic body 410 having the same polarity as the second magnetic body 420 is installed at the position facing the second magnetic body 420 or the air or hydraulic cylinder installed in connection with the air discharge pipe 310.
  • 430 is made of any one.
  • the elastic spring 350 is installed between the stopper 330 and the moving means 400, the molten resin inlet 140 is formed in the vertical direction in the upper center of the core 130, the air outlet 150 ) Is formed to be inclined to have a slope of 5-15 ° in the direction toward the inner sidewall of the core 130 on one side of the molten resin inlet 140.
  • the injection mold apparatus of the present invention having the above configuration is easily formed when the molten resin is supplied into the core of the injection mold, and also easily discharges air and gas in the core to be molded in the core. At the same time there is an effect that can reduce the material cost while producing molded parts without defects and bonding.
  • the injection mold apparatus of the present invention injects molten resin after discharging or discharging air or gas in the core, the pressure inside the core can be reduced, thereby reducing the thickness of the injection mold. It is effective to reduce mold raw materials.
  • FIG. 1 is a cross-sectional view schematically showing a conventional injection mold apparatus of the first embodiment
  • Figure 2 is a schematic view showing a conventional injection mold apparatus of the second embodiment
  • FIG. 3 is a schematic view showing an injection mold apparatus of the present invention.
  • Figure 4 is a cross-sectional view of the air discharge means in the injection mold apparatus of the present invention.
  • 5A and 5B are sectional views showing the operation of the first embodiment of the air discharge means in the injection mold apparatus of the present invention.
  • FIG. 6 is a cross-sectional view showing the operation of the second embodiment of the air discharge means in the injection mold apparatus of the present invention.
  • Figure 7 is a schematic diagram for explaining the process of the molten resin is filled in the injection mold of the present invention and the structure of the molten resin inlet and air outlet.
  • the molten resin injection device 200 is provided at one side of an injection mold 100 in which a molten resin is supplied between upper and lower plates 110.120 to produce a molded article.
  • a molten resin inlet 140 is installed, and an injection mold apparatus having an air outlet 150 is formed at the other side of the injection mold 100.
  • the molten resin inlet 140 is provided with a valve (B), the air outlet 150 is provided with an air discharge means 300 for discharging the air and gas inside the core 130, the air discharge means ( One side of the 300 is provided with a moving means 400 for moving forward / backward the air discharge means 300, the reason for installing the valve (B) in the molten resin inlet 140 is molten resin injector 200 Through the injection of the molten resin into the core 130 is completed to automatically shut off.
  • the air discharge port 150 is provided with an air discharge means 300 for discharging the air and gas in the core 130, the reason is that the air or gas is present in the core 130, the molten resin is injected This is to prevent the bad effect (defect) on the product is molded in the core 130.
  • a specific configuration of the air discharge means 300 is provided with an air discharge pipe 310 in which an air discharge path 320 is formed at an inner center thereof, and the tip of the air discharge pipe 310 has a funnel shape.
  • the stopper 330 of the stopper 330 is formed on the rear air discharge pipe 310 of the stopper 330 is connected to the air discharge path 320 and the air inlet 340 selectively communicating with the inside of the core 130 Consists of formed.
  • the air discharge pipe 310 is preferably a cylindrical shape, but may be a square having four or more squares as necessary.
  • An air discharge path 320 is formed at an inner center of the air discharge pipe 310, and an air suction port 340 is formed at the front of the air discharge path 320 to selectively communicate with the inside of the core 130. Air or gas inside the core 130 is discharged to the outside along the air discharge path 320 through the air suction port 340.
  • an inlet or stopper 330 of the air discharge pipe 310 is closed.
  • the air inlet 340 is located inside the core 130 is located above the inside of the core 130.
  • the inlet of the air discharge pipe 310 that is, the stopper 330 is buried in the upper plate 110 of the injection mold 100 and at the same time the air inlet 340 In a buried state, air or gas inside the core 130 is not discharged.
  • the moving means 400 for moving the air discharge pipe 310 is provided with a second magnetic body 420 wound around the coil at the same time as the magnetic supply at the outside of the air discharge pipe 310 is installed
  • the first magnetic body 410 having the same polarity as the second magnetic body 420 is installed at a position facing each other with the second magnetic body 420 of the injection mold 100, and the coil is wound around the second magnetic body.
  • the second magnetic body 420 When electricity is supplied to the coil of 420, the second magnetic body 420 generates a magnetic force on either side of the N pole or the S pole, and the first magnetic body 410 is the N pole or S of the second magnetic body 420. It is supposed to have the same pole as the pole on either side of the pole.
  • the state in which the air discharge pipe 310 is not moved is a state in which the stopper 330 is embedded in the upper plate 110 as shown in FIG. 5A, and the state in which the air discharge pipe 310 is moved is shown in FIG. 5B.
  • 330 protrudes from the upper plate 110 into the core 130.
  • the elastic spring 350 is compressed to exert an elastic force, but when the electricity supply to the coil 420 is stopped, magnetic force is not generated.
  • the stopper 330 is embedded in the upper plate 110 as shown in FIG. 5A by pushing up the air discharge pipe 310 by the elastic force of 350.
  • the air inlet 340 is buried in the upper plate 110, thereby preventing the air and the gas inside the core 130 from being discharged.
  • the moving means 400 moving forward / backward of the air discharge means 300 is provided with one of air or hydraulic cylinders 430 on one side of the air discharge means 300.
  • the air and gas in the core 130 is to be discharged, as shown in FIG. 5B, when the stopper 330 is protruded from the upper plate 110 into the core 130 to be discharged through the air suction port 340.
  • any one of the air or the hydraulic cylinder 430 is operated to move the air inlet 340 and the stopper 330 as shown in FIG. 5A to the injection mold 100.
  • the upper plate 110 may be embedded.
  • the molten resin is injected into the core 130 through the molten resin inlet 140 using the molten resin injector 200.
  • molten resin is injected into the core 130.
  • the molten resin inlet 140 is preferably formed in the vertical direction in the upper center of the core 130, the air outlet 150 is the inner sidewall of the core 130 on one side of the molten resin inlet 140 It is preferably formed to be inclined to have an inclination of 5-15 ° in the direction toward.
  • the reason for this is that the molten resin injected through the molten resin inlet 140 as shown in FIG. 7 is wrapped in the upper direction from the bottom of the center of the inner core to the upper side, and thus the inner outer side of the core 130 is finally filled. The air or the gas of the inner side of the core 130 is finally discharged. Therefore, to easily discharge the air or gas in the core that is finally discharged.
  • the present invention by installing a separate air suction device 360 at the rear end of the air discharge path 320, that is, the rear end of the air discharge pipe 310 to forcibly suck the air and gas in the core and make the remaining air to melt the resin
  • the molten resin may be injected into the injection hole 140.
  • the injection mold apparatus of the present invention as described above is easy to supply when molten resin is supplied into the core of the injection mold, as well as to easily discharge the air and gas in the core to defective molded products molded in the core And there is a unique advantage that can reduce the material cost while producing without combining.

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

Abstract

La présente invention porte sur un dispositif de moulage par injection destiné à faciliter l'amenée d'une résine fondue lorsque la résine fondue est fournie dans le noyau d'un moule d'injection et à faciliter l'évacuation de l'air et du gaz contenus à l'intérieur du noyau, en produisant par ce moyen un produit moulé qui est moulé à l'intérieur du noyau sans défauts ni failles, et qui, en même temps, réduit les coûts de matière. Le dispositif de moulage par injection comprend : une entrée de résine fondue (140) formée sur un côté d'un moule d'injection (100) dans lequel un noyau (130), auquel on amène une résine fondue pour produire un produit moulé, est disposé entre des plateaux supérieur et inférieur (110, 120) et un dispositif d'injection de résine fondue (200) est disposé à l'entrée de résine fondue (140); et une sortie d'air (150) formée sur l'autre côté du moule d'injection (100), une vanne (B) étant disposée à l'entrée de résine fondue (140), un moyen d'évacuation d'air (300) destiné à évacuer l'air et le gaz situés à l'intérieur du noyau (130) étant disposé à la sortie d'air (150) et un moyen de déplacement (400) destiné à déplacer le moyen d'évacuation d'air (300) vers l'avant ou vers l'arrière étant prévu sur un côté du moyen d'évacuation d'air (300).
PCT/KR2010/008477 2010-11-26 2010-11-29 Dispositif de moulage par injection WO2012070709A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0118661 2010-11-26
KR20100118661A KR101290348B1 (ko) 2010-11-26 2010-11-26 사출금형 장치

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WO2012070709A1 true WO2012070709A1 (fr) 2012-05-31

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WO (1) WO2012070709A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108357054A (zh) * 2018-05-02 2018-08-03 东江模具（深圳）有限公司 一种利用单向气阀固定iml薄膜注塑成型装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101684222B1 (ko) * 2016-05-04 2016-12-07 김형수 사출금형 가스배출장치
CN112848137A (zh) * 2021-01-14 2021-05-28 武汉圣维林环节能技术有限公司 一种提高注塑质量的气孔机构
KR20220129174A (ko) * 2021-03-16 2022-09-23 삼성전자주식회사 사출 성형 장치 및 시스템

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07241854A (ja) * 1994-03-02 1995-09-19 Mitsubishi Materials Corp ガスベント付き金型装置
KR20070019331A (ko) * 2005-08-12 2007-02-15 유도실업주식회사 자력을 이용한 사출기용 실린더의 작동장치
KR20080007945A (ko) * 2006-07-19 2008-01-23 기아자동차주식회사 플라스틱 금형의 가스 배출 장치
KR20100003595U (ko) * 2008-09-25 2010-04-02 홍순열 전자석을 이용한 핫 런너 밸브 게이트 장치의 밸브핀 작동부 결합구조

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07241854A (ja) * 1994-03-02 1995-09-19 Mitsubishi Materials Corp ガスベント付き金型装置
KR20070019331A (ko) * 2005-08-12 2007-02-15 유도실업주식회사 자력을 이용한 사출기용 실린더의 작동장치
KR20080007945A (ko) * 2006-07-19 2008-01-23 기아자동차주식회사 플라스틱 금형의 가스 배출 장치
KR20100003595U (ko) * 2008-09-25 2010-04-02 홍순열 전자석을 이용한 핫 런너 밸브 게이트 장치의 밸브핀 작동부 결합구조

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108357054A (zh) * 2018-05-02 2018-08-03 东江模具（深圳）有限公司 一种利用单向气阀固定iml薄膜注塑成型装置
CN108357054B (zh) * 2018-05-02 2024-03-08 东江模具（深圳）有限公司 一种利用单向气阀固定iml薄膜注塑成型装置

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KR101290348B1 (ko) 2013-07-26
KR20120057084A (ko) 2012-06-05

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