KR20120057084A - Injection mold apparatus - Google Patents

Injection mold apparatus Download PDF

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Publication number
KR20120057084A
KR20120057084A KR1020100118661A KR20100118661A KR20120057084A KR 20120057084 A KR20120057084 A KR 20120057084A KR 1020100118661 A KR1020100118661 A KR 1020100118661A KR 20100118661 A KR20100118661 A KR 20100118661A KR 20120057084 A KR20120057084 A KR 20120057084A
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KR
South Korea
Prior art keywords
air
air discharge
injection mold
core
molten resin
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KR1020100118661A
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Korean (ko)
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KR101290348B1 (en
Inventor
오승아
Original Assignee
지엘하이테크 주식회사
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Application filed by 지엘하이테크 주식회사 filed Critical 지엘하이테크 주식회사
Priority to KR20100118661A priority Critical patent/KR101290348B1/en
Priority to PCT/KR2010/008477 priority patent/WO2012070709A1/en
Publication of KR20120057084A publication Critical patent/KR20120057084A/en
Application granted granted Critical
Publication of KR101290348B1 publication Critical patent/KR101290348B1/en

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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

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

Abstract

The present invention facilitates the supply of molten resin into the core of the injection mold, and also easily discharges air and gas in the core to produce molded articles molded in the core without defects or defects. The present invention relates to an injection mold apparatus capable of reducing material costs, and its configuration is provided on 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. In the injection mold apparatus in which the molten resin inlet 140 is installed, the molten resin injector 200 is installed, and the air outlet 150 is formed at the other side of the injection mold 100, and in the molten resin inlet 140. The valve (B) is installed, the air outlet 150 is provided with air discharge means 300 for discharging air and gas in the core 130, one side of the air discharge means (300) It made the outlet means 300 to be installed in the mobile unit 400 to the forward / backward.

Description

Injection mold apparatus

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.

Looking at the process of injecting the molding material, that is, the liquid resin in the mold in the general injection molding as follows.

When the molten molding material is injected into the sprue of the mold by a piston, the injected molding material flows into the cavity inside the mold. As described above, when the molding material flows, 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.

1 is a cross-sectional view of a mold showing a cavity according to the prior art.

As shown in FIG. 1, generally, 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. In this state, when the molding material 10 is injected through the sprue 11, high pressure is generated at a portion where the sprue 11 and the runner 12 cross each other.

In order to solve the problem that the pressure is increased at the intersection of the sprue 11 and the runner 12 as described above, 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.

However, as the sprue is manufactured in a conical shape, the sprue cross section at the intersection of the sprue and the runner becomes wider and the quantity of the molding material increases.

As such, when the amount of the molding material increases, the hardness increases by that amount, so that the crack easily occurs in the impact. In addition, there is a problem that 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.

In addition, conventionally, 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. Connected to the compressor through the venturi tube flows through the exhaust port to the inlet port connected to one side of the venturi tube to inject the injection gas of the injection mold is discharged to the discharge port 24 and the pipe connecting the vacuum generator and the compressor And an on / off valve 26 arranged to open and close the flow of air from the compressor to the vacuum generating unit by the operation of the solenoid 25. The vacuum is generated in the venturi tube, the gas injection from the injection mold is a vacuum suction generated is formed to be discharged to the outside.

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.

Characteristic technical features of the present invention for achieving the above object, 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) In the injection mold apparatus in which 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.

And 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.

In addition, 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.

In addition, 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.

In addition, since 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.

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,
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.
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.

As shown in FIG. 3, 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.

Since the injection mold apparatus having the above configuration is a known conventional technology, a detailed description thereof will be omitted, and the features of the present invention will be described in detail as follows.

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.

And 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.

As shown in FIG. 4, 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.

However, when air or gas inside the core 130 is discharged along the air discharge path 320 through the air suction port 340, as shown in FIG. 5B, an inlet or stopper 330 of the air discharge pipe 310 is closed. When the air inlet 340 is located inside the core 130 is located above the inside of the core 130.

In addition, when all the air or gas inside the core 130 is discharged, 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.

As described above, 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. 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.

Therefore, when electricity is supplied to the second magnetic body 420, a pole of either side of the N pole or the S pole is generated, and the first magnetic body 410 is the same pole as the pole generated in the second magnetic body 420. Because it is formed to act to push each other. Therefore, since the pushing force extends to the air discharge pipe 310, the air discharge pipe 310 is moved.

However, 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. At this time, when the air discharge pipe 310 is moved, 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.

In this case, 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.

Meanwhile, as shown in FIG. 6, 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. When 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. When the air and the gas discharge in the core 130 is not necessary, 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.

When the air and the gas inside the core 130 is discharged, the molten resin is injected into the core 130 through the molten resin inlet 140 using the molten resin injector 200. When air and gas are not discharged, molten resin is injected into the core 130.

And 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 is that the molten resin injected through the molten resin inlet 140 as shown in FIG. 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.

In addition, 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.

100: injection mold 110: upper plate
120: lower plate 130: core
140: molten resin inlet 150: air outlet
200: molten resin injection device 300: air discharge means
310: air discharge pipe 320: air discharge path
330: stopper 340: air intake
350: elastic spring 400: moving means
410: bracket 420: coil
430: air or hydraulic cylinder B: valve

Claims (6)

The molten resin inlet 140 is installed on the side of the injection mold 100, the molten resin is supplied between the upper and lower plates (110.120) is provided with a core 130 for producing a molded article. In the injection mold apparatus is formed, the other side of the injection mold 100, the air outlet 150 is formed,
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 ( Injection molding apparatus, characterized in that one side of the 300 is provided with a moving means 400 for moving forward / backward the air discharge means (300). According to claim 1, The air discharge means 300 is provided with an air discharge pipe 310, the air discharge path 320 is formed in the inner center, the tip of the air discharge pipe 310 is a funnel-shaped stopper ( 330 is formed, and the air inlet 340 is formed on the rear air discharge pipe 310 of the stopper 330 and connected to the air discharge path 320 and selectively communicates with the inside of the core 130. Injection mold apparatus characterized in that. According to claim 1 or claim 2, The moving means 400 for moving forward / backward the air discharge means 300 is made of a coil coiled on the outside of the air discharge pipe 310 and the magnetic at the same time is supplied with electricity A second magnetic body 420 is installed, and 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 Injection mold apparatus. According to claim 1 or claim 2, The moving means 400 for moving forward / backward the air discharge means 300 is any one of the air or hydraulic cylinder 430 is connected to the air discharge pipe 310 is installed Injection mold apparatus characterized in that. The injection mold apparatus according to claim 1 or 2, wherein an elastic spring (350) is installed between the stopper (330) and the moving means (400). According to claim 1 or 2, wherein the molten resin inlet 140 is formed in the vertical direction in the upper center of the core 130, the air outlet 150 is on one side of the molten resin inlet 140 Injection mold apparatus, characterized in that formed inclined to have a slope of 5-15 ° in the direction toward the inner side wall of the core (130).





KR20100118661A 2010-11-26 2010-11-26 Injection mold apparatus KR101290348B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR20100118661A KR101290348B1 (en) 2010-11-26 2010-11-26 Injection mold apparatus
PCT/KR2010/008477 WO2012070709A1 (en) 2010-11-26 2010-11-29 Injection molding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20100118661A KR101290348B1 (en) 2010-11-26 2010-11-26 Injection mold apparatus

Publications (2)

Publication Number Publication Date
KR20120057084A true KR20120057084A (en) 2012-06-05
KR101290348B1 KR101290348B1 (en) 2013-07-26

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KR20100118661A KR101290348B1 (en) 2010-11-26 2010-11-26 Injection mold apparatus

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WO (1) WO2012070709A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101684222B1 (en) * 2016-05-04 2016-12-07 김형수 Gas exhausting device for injection mold
CN112848137A (en) * 2021-01-14 2021-05-28 武汉圣维林环节能技术有限公司 Improve gas pocket mechanism of quality of moulding plastics
WO2022196935A1 (en) * 2021-03-16 2022-09-22 삼성전자 주식회사 Device and system for injection molding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108357054B (en) * 2018-05-02 2024-03-08 东江模具（深圳）有限公司 Utilize fixed IML film injection molding device of one-way pneumatic valve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07241854A (en) * 1994-03-02 1995-09-19 Mitsubishi Materials Corp Mold assembly provided with gas vent
KR20070019331A (en) * 2005-08-12 2007-02-15 유도실업주식회사 Device for Operating of Cylinder for injection molding machine using magnetisn
KR20080007945A (en) * 2006-07-19 2008-01-23 기아자동차주식회사 Gas breathing device of plastic mold
KR20100003595U (en) * 2008-09-25 2010-04-02 홍순열 Valve pin operation assembling structure of hot runner valve gate device using electromagnet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101684222B1 (en) * 2016-05-04 2016-12-07 김형수 Gas exhausting device for injection mold
CN112848137A (en) * 2021-01-14 2021-05-28 武汉圣维林环节能技术有限公司 Improve gas pocket mechanism of quality of moulding plastics
WO2022196935A1 (en) * 2021-03-16 2022-09-22 삼성전자 주식회사 Device and system for injection molding

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Publication number Publication date
KR101290348B1 (en) 2013-07-26
WO2012070709A1 (en) 2012-05-31

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