KR20030055054A - Mold of valve gate hotrunner for injection molding - Google Patents
Mold of valve gate hotrunner for injection molding Download PDFInfo
- Publication number
- KR20030055054A KR20030055054A KR1020010085498A KR20010085498A KR20030055054A KR 20030055054 A KR20030055054 A KR 20030055054A KR 1020010085498 A KR1020010085498 A KR 1020010085498A KR 20010085498 A KR20010085498 A KR 20010085498A KR 20030055054 A KR20030055054 A KR 20030055054A
- Authority
- KR
- South Korea
- Prior art keywords
- injection molding
- valve
- valve pin
- mold
- heater
- Prior art date
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229920005989 resin Polymers 0.000 abstract description 8
- 239000011347 resin Substances 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
Classifications
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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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7331—Heat transfer elements, e.g. heat pipes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
본 발명은 사출성형용 금형의 밸브 게이트 핫트 런너에 관한 것으로서 밸브 게이트 핫트런너 시스템을 이루는 밸브 핀에 히터(heater)를 설치하고 상기 밸브 핀이 사출성형시 냉각(冷却)되는 것을 방지하여 주므로서 사출성형시 밸브 핀에 접하는 용융된 수지가 차거운 금형에 의해 식지 않고 충분한 용융상태를 유지하여 원활한 사출성형이 이루어져 광학부품(光學部品)이나 고정도(高精度)를 요하는 사출성형품을 보다 안정적으로 성형할 수 있도록 한 것이다.The present invention relates to a valve gate hot runner of an injection molding die, and provides a heater by installing a heater on the valve pin forming the valve gate hot runner system and preventing the valve pin from being cooled during injection molding. When molding, the molten resin in contact with the valve pin does not cool down by a cold mold and maintains a sufficient molten state, so that smooth injection molding is performed to more stably form an optical part or an injection molded product requiring high precision. It is to be done.
이와 같은 종래의 사출성형용 금형의 핫트런너 시스템(hot-runner system)에 있어서는 사출성형된 성형품의 품질에는 이상이 없다. 그러나 매니폴드(manifolde)에 접해 있는 열가소성수지는 충분히 용융상태를 유지하나, 밸브 핀(valve pin)은 고정측 취부판에 조립되어 있기 때문에 밸브 핀이 금형의 온도와 비슷한 온도로 냉각되므로 인하여 밸브 핀에 접해 있는 용융된 수지는 약간 냉각되므로 인하여 반용융상태(半熔融狀態)를 유지하게 된다. 따라서 상기와 같은 핫트런너 시스템이 설치되어 있을 경우에는 광학부품(光學部品)이나 고정도(高精度)를 요하는 성형품을 성형할 때 밸브 핀에 접해 있는 냉각된 수지가 캐비티(cavity) 안으로 흘러 들어가 성형이 될 경우에는 성형물에 치명적인 문제점이 발생하게 되었고 또한 안정적인 사출성형이 매우 어려운 등의 문제점이 있었다.In such a conventional hot-runner system of the injection mold, there is no abnormality in the quality of the injection molded molded article. However, the thermoplastic resins in contact with the manifold remain sufficiently molten, but the valve pins are assembled to the fixed side mounting plate, so the valve pins are cooled to a temperature similar to the mold temperature because the valve pins are assembled. The molten resin adjoining is slightly cooled to maintain the semi-molten state. Therefore, when the above-described hot runner system is installed, the cooled resin, which is in contact with the valve pin, flows into the cavity when molding an optical part or a molded article requiring high precision. When the molding is a fatal problem occurs in the molding and there was a problem such as a very difficult injection molding stable.
본 발명은 상기와 같은 종래 사출성형용 금형의 밸브 게이트 핫트런너 시스템의 구조를 개량하여 제반 문제점을 해결하기 위하여 발명된 것으로서 핫트런너 시스템을 이루는 밸브 핀에 히터를 설치하고 상기 밸브 핀이 사출성형시 냉각되는 것을 방지하여 주므로서 용융된 수지가 식지 않고 충분한 용융상태를 유지하기 때문에 원활한 사출성형이 이루어져 광학부품이나 고정도를 요하는 사출성형물을 보다 안정적으로 사출성형할 수 있도록 하고 불량품을 줄일 수 있도록 한 것이다.The present invention was invented to solve the problems by improving the structure of the valve gate hot runner system of the conventional injection molding mold as described above, when the heater is installed on the valve pin forming the hot runner system and the valve pin is injection molded By preventing the cooling, the molten resin does not cool down and maintains a sufficient molten state, so that smooth injection molding is performed to make injection molding requiring optical parts or high precision more stable injection molding and to reduce defective products. will be.
도 1은 본 발명의 종단면도1 is a longitudinal cross-sectional view of the present invention;
<도면의 주요 부분에 대한 부호 설명><Description of the symbols for the main parts of the drawings>
10 : 밸브 핀 20 : 매니폴드10: valve pin 20: manifold
30 : 밸브 노즐 40 : 성형품30: valve nozzle 40: molded product
50 : 고정측 취부판 60 : 캐비티 플레이트50: fixed side mounting plate 60: cavity plate
70 : 게이트 80 : 피스톤70: gate 80: piston
90 : 전원입력선 100 : 히터90: power input line 100: heater
이하 본 발명의 구성을 첨부된 도면에 따라 상세히 설명하면 다음과 같다.Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
첨부된 도면의 도 1에 있어서, 10은 밸브 핀(valve pin)을 나타내는 것이고, 20은 매니폴드(manifolde)를 나타내는 것이며, 30은 밸브 노즐을 나타내는 것이고, 40은 성형품을 나타내는 것이며, 50은 고정측 취부판을 나타내는 것이고, 60은 캐비티 플레이트(cavity plate)를 나타내는 것이며, 70은 게이트(gate)를 나타내는 것이고, 80은 피스톤(piston)을 나타내는 것이며, 90은 전원입력선을 나타내는 것이다.In FIG. 1 of the accompanying drawings, 10 represents a valve pin, 20 represents a manifold, 30 represents a valve nozzle, 40 represents a molded article, and 50 represents a fixed The side mounting plate represents a cavity plate, 60 represents a cavity plate, 70 represents a gate, 80 represents a piston, and 90 represents a power input line.
상기와 같은 본 발명의 구성에 있어서, 주 요부는 상기 밸브 핀(10)에 히터(100)를 설치하고 사출성형시 상기 히터(100)의 발열로 상기 밸브 핀(10)이 냉각되는 것을 방지할 수 있도록 구성한 것을 특징으로 하는 것이다.In the configuration of the present invention as described above, the main part is to install the heater 100 to the valve pin 10 and to prevent the valve pin 10 is cooled by the heating of the heater 100 during injection molding. It is characterized in that configured so that.
상기와 같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.
전원입력선(90)에 전원을 인가하면 성형기에서 용융된 열가소성수지는 매니폴드(20)와 밸브 노즐(30)을 통하여 캐비티 플레이트(60)의 캐비티(cavity) 안으로 흘러 들어간다. 용융된 열가소성수지가 캐비티 안으로 흘러 들어간 후 일정시간이 지나면 고정측 취부판(50)에 설치된 밸브 핀(10)이 피스톤(80)의 왕복운동으로 게이트(70)의 구멍을 기계적으로 막아 성형을 완료하게 된다. 이때 용융된 수지(40)는 차거운 금형에 의해 냉각되지 않고 히터(10)의 발열로 상기 밸브 핀(10)이 일정한 온도로 가열되어 충분히 용융상태를 유지하여 성형품을 성형하게 된다.When power is applied to the power input line 90, the molten thermoplastic resin flows into the cavity of the cavity plate 60 through the manifold 20 and the valve nozzle 30. After a certain period of time after the molten thermoplastic resin flows into the cavity, the valve pin 10 installed on the fixed side mounting plate 50 mechanically blocks the hole in the gate 70 by reciprocating the piston 80 to complete molding. Done. At this time, the molten resin 40 is not cooled by a cold mold, but the valve pin 10 is heated to a constant temperature by the heat of the heater 10 to maintain a sufficiently molten state to form a molded article.
상기에 의한 본 발명은 밸브 핀에 히터를 설치하여 외부입력선의 전원으로 히원으로 히터가 발열하면서 밸브 핀을 가열하여 주기 때문에 용융수지가 냉각되지않고 일정한 온도를 유지하여 주므로서 냉각된 수지가 발생되지 않아 광학부품이나 고정도를 요하는 사출성형품을 성형하더라도 기계식 밸브 게이트의 특성을 그대로 살리면서 원활한 사출성형이 이루어져 보다 안정적으로 성형품을 사출할 수 있는 등의 효과를 나타내게 되는 것이다.According to the present invention by installing a heater in the valve pin to heat the valve pin while the heater generates heat to the heat source by the power of the external input line, the resin is not cooled by maintaining a constant temperature without cooling the molten resin. Therefore, even when molding an optical part or an injection molded article requiring high precision, the injection molding is made more stable while maintaining the characteristics of the mechanical valve gate as it is, resulting in a more stable injection of the molded article.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0085498A KR100469526B1 (en) | 2001-12-26 | 2001-12-26 | Mold of valve gate hotrunner for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0085498A KR100469526B1 (en) | 2001-12-26 | 2001-12-26 | Mold of valve gate hotrunner for injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20030055054A true KR20030055054A (en) | 2003-07-02 |
| KR100469526B1 KR100469526B1 (en) | 2005-02-02 |
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ID=32213764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-2001-0085498A KR100469526B1 (en) | 2001-12-26 | 2001-12-26 | Mold of valve gate hotrunner for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100469526B1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0148822B1 (en) * | 1993-09-13 | 1998-10-15 | 니시오카 가츠아키 | Method for injection molding runnerless by controlling valve gate and apparatus |
| US5480606A (en) * | 1994-12-07 | 1996-01-02 | Sunbeam Plastics Corporation | Method and apparatus for reverse gated compression molding of thermoplastic material |
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2001
- 2001-12-26 KR KR10-2001-0085498A patent/KR100469526B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| KR100469526B1 (en) | 2005-02-02 |
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