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KR100497970B1 - Injection molder for mixing gas - Google Patents

Injection molder for mixing gas Download PDF

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Publication number
KR100497970B1
KR100497970B1 KR10-2002-0047701A KR20020047701A KR100497970B1 KR 100497970 B1 KR100497970 B1 KR 100497970B1 KR 20020047701 A KR20020047701 A KR 20020047701A KR 100497970 B1 KR100497970 B1 KR 100497970B1
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South Korea
Prior art keywords
gas
molten resin
injection molding
mixing
injection
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Expired - Fee Related
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KR10-2002-0047701A
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Korean (ko)
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KR20040015451A (en
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박수용
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현대모비스 주식회사
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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
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • 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
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1732—Control circuits therefor
    • 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
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C2045/1722—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles injecting fluids containing plastic material

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

Abstract

본 발명은 가스 혼합 사출용 사출성형기에 관한 것으로서, 특히, 가스를 용융수지와 혼합하여 사출성형하는 가스 혼합 사출용 사출성형기를 개선하여, 가스와 용융수지가 고르게 혼합되도록 하여 양질의 사출성형물을 얻기 위한 장치에 관한 것으로서, 금형(500)의 주입구(510)와 연통 형성된 노즐(100)과; 상기 노즐(100)에 연통 형성되어 용융수지(W)가 공급되는 용융수지공급관(200)과; 상기 노즐(100)과 용융수지공급관(200) 사이에 위치하여 내경이 축소되었다가 확장되는 벤추리(310)가 형성된 혼합부(300)와; 상기 혼합부(300)의 벤추리(310) 중단과 연통 형성되어 혼합용 가스(G)를 공급하는 가스공급관(400)으로 구성되어, 가스 혼합 사출용 사출성형기를 개선시켜 금형에 주입되는 용융수지에 가스가 고르게 혼합되도록 할 수 있는 동시에, 용융수지에 혼합되는 가스의 양을 조절할 수 있기 때문에 양질의 사출성형물을 얻을 수 있도록 하는 것이다.The present invention relates to an injection molding machine for gas mixture injection, and in particular, to improve the gas injection molding machine for injection molding by mixing gas with a molten resin to obtain a high quality injection molding by mixing the gas and the melt evenly. A device for the present invention comprises: a nozzle (100) formed in communication with an injection hole (510) of a mold (500); A molten resin supply pipe 200 formed in communication with the nozzle 100 to supply molten resin W; A mixing unit (300) formed between the nozzle (100) and the molten resin supply pipe (200), the venturi (310) having an inner diameter thereof reduced and expanded therebetween; It is formed in communication with the venturi 310 stop of the mixing part 300 is composed of a gas supply pipe 400 for supplying the gas for mixing (G), improve the gas injection molding machine for injection into the molten resin injected into the mold The gas can be mixed evenly, and the amount of gas mixed in the molten resin can be controlled to obtain a high quality injection molding.

Description

가스 혼합 사출용 사출성형기 {Injection molder for mixing gas} Injection molder for gas mixing

본 발명은 가스 혼합 사출용 사출성형기에 관한 것으로서 특히, 가스를 용융수지와 혼합하여 사출성형하는 가스 혼합 사출용 사출성형기를 개선하여, 가스와 용융수지가 고르게 혼합되도록 하여 양질의 사출성형물을 얻기 위한 장치로써, 사출성형용 금형에 주입되는 용융수지에 가스가 고르게 혼합되도록 할 수 있는 동시에, 용융수지에 혼합되는 가스의 양을 조절할 수 있기 때문에 양질의 사출성형물을 얻을 수 있는 장치에 관한 것이다.The present invention relates to an injection molding machine for gas mixture injection, and in particular, to improve the gas injection molding machine for injection molding by mixing gas with a molten resin, so that the gas and the melt can be evenly mixed to obtain a high quality injection molding product. The present invention relates to a device capable of uniformly mixing gas into a molten resin injected into an injection molding mold and controlling an amount of gas mixed into the molten resin, thereby obtaining a high quality injection molded product.

일반적으로 사출성형은 플라스틱의 성형가공법으로, 열가소성수지를 성형하는 방법의 중심을 이루고 있다. In general, injection molding is a plastic molding process, which forms the center of a thermoplastic resin molding method.

이러한 사출성형 공정은 먼저, 플라스틱에 안료·안정제·가소제·충전제 등을 첨가하여 원통형 또는 사각형으로 된 수 mm의 칩으로 만든 것, 즉 컴파운드를 호퍼에 넣어두며, 투입구 바로 앞에 가열실이 있어, 여기에서 전열·고압수증기 등으로 가열하게 된다. This injection molding process first consists of several millimeters of chips of cylindrical or square shape, with the addition of pigments, stabilizers, plasticizers, fillers, etc. to the plastic, ie the compound is placed in the hopper, and there is a heating chamber right in front of the inlet. Is heated by heat transfer, high pressure steam, etc.

이때, 사출성형하고자 하는 재료가 스티렌수지나 폴리염화비닐이면 약 170℃, 폴리프로필렌이면 약 200℃로 재료에 따라 알맞게 가열하여 플라스틱을 용융상태로 만들고, 이후, 용융수지를 피스톤으로 주입구를 통해서 금형 속으로 사출하여, 금형의 구석까지 용융수지가 흘러 들어가 응고되면, 금형은 두 짝으로 갈라져서, 금형 속에서 굳은 사출성형물을 밖으로 꺼내게 된다. At this time, if the material to be injection molded is styrene resin or polyvinyl chloride, it is about 170 ° C., and if it is polypropylene, it is heated to about 200 ° C. according to the material to make the plastic melted, and then the molten resin is piston through the injection hole. When the molten resin flows to the corner of the mold and solidifies, the mold is divided into two pairs to take out the solid injection molding from the mold.

이러한 사출성형을 통하여, 매우 작은 것부터 무게 10 kg에 이르는 큰 것까지 성형할 수 있으며, 반복해서 사출성형하여 대량생산을 할 수 있으므로 작업능률이 높다는 장점이 있다.Through such injection molding, it is possible to mold from very small to large, up to 10 kg in weight, and it is advantageous in that work efficiency is high because it can be repeatedly injected and mass-produced.

사출성형에 사용되는 재료로는 폴리에스텔, 초산비닐, 각종 플라스틱, 나일론 등과 같은 일반적인 열가소성수지가 많이 사용되고 있으며, 최근에는 베이클라이트계의 열경화성수지도 부속설비가 개발되어 사출성형을 할 수 있게 되었다. As a material used for injection molding, general thermoplastic resins such as polyester, vinyl acetate, various plastics, nylon, etc. are widely used, and recently, bakelite-based thermosetting resin accessories have been developed to enable injection molding.

최근에는, 사출성형에 용융수지만을 사출성형 재료로 사용하지 않고 질소가스 등과 같은 가스를 용융수지와 함께 사출성형함으로써, 제품의 경량화를 이룰수 있는 동시에, 제품의 변형을 방지할 수 있다는 효과가 있다.In recent years, by injection molding a gas such as nitrogen gas together with the molten resin without using only molten resin as the injection molding material, the weight of the product can be reduced and the deformation of the product can be prevented. .

그러나, 이러한 일반적인 사출성형은 주입 가스와 용융수지가 고르게 혼합되지 않아, 가스의 충진 불량 등에 의하여 성형 제품의 두께가 불균일하게 성형된다는 기술상의 문제점이 있었다.However, this general injection molding has a technical problem that the injection gas and the molten resin are not evenly mixed, and the thickness of the molded product is unevenly formed due to poor filling of the gas.

본 발명은 상기의 문제점을 해소하기 위한 것으로, 가스 혼합 사출용 사출성형기를 개선시켜 금형에 주입되는 용융수지에 가스가 고르게 혼합되도록 할 수 있는 동시에, 용융수지에 혼합되는 가스의 양을 조절할 수 있기 때문에 양질의 사출성형물을 얻을 수 있도록 하는 가스 혼합 사출용 사출성형기를 제공하고자 한다.The present invention is to solve the above problems, by improving the gas injection molding machine for injection to ensure that the gas is evenly mixed in the molten resin injected into the mold, it is possible to control the amount of gas mixed in the molten resin Therefore, to provide an injection molding machine for gas mixture injection to obtain a high quality injection molding.

이러한 본 발명은 금형의 주입구와 연통 형성된 노즐과; 상기 노즐에 연통 형성되어 용융수지가 공급되는 용융수지공급관과; 상기 노즐과 용융수지공급관 사이에 위치하여 내경이 축소되었다가 확장되는 벤추리가 형성된 혼합부와; 상기 혼합부의 벤추리 중단과 연통 형성되어 혼합용 가스를 공급하는 가스공급관으로 구성함으로써 달성된다. The present invention is a nozzle formed in communication with the injection hole of the mold; A molten resin supply pipe communicating with the nozzle and supplied with a molten resin; A mixing unit having a venturi formed between the nozzle and the molten resin supply pipe, the inner diameter of which is reduced and then expanded; It is achieved by forming a gas supply pipe in communication with the venturi interruption of the mixing section to supply the gas for mixing.

본 발명의 실시예를 첨부 도면을 참조하여 상세히 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 가스 혼합 사출용 사출성형기를 도시하는 개략적인 구성도이며, 도 2는 본 발명의 가스 혼합 사출용 사출성형기의 요부를 도시하는 단면도이고, 도 3은 본 발명의 가스 혼합 사출용 사출성형기에 대한 혼합부를 도시하는 단면도이다.1 is a schematic configuration diagram showing a gas injection molding machine of the present invention, Figure 2 is a cross-sectional view showing the main portion of the injection molding machine for gas mixture injection of the present invention, Figure 3 is a gas mixture injection of the present invention It is sectional drawing which shows the mixing part about the injection molding machine.

도 1 내지 도 3에 도시된 바와 같이 본 발명의 가스 혼합 사출용 사출성형기는, 금형(500)의 주입구(510)와 연통 형성된 노즐(100)과; 상기 노즐(100)에 연통 형성되어 용융수지(W)가 공급되는 용융수지공급관(200)과; 상기 노즐(100)과 용융수지공급관(200) 사이에 위치하여 내경이 축소되었다가 확장되는 벤추리(310)가 형성된 혼합부(300)와; 상기 혼합부(300)의 벤추리(310) 중단과 연통 형성되어 혼합용 가스(G)를 공급하는 가스공급관(400)으로 구성되는 것을 그 기술상의 기본 특징으로 한다.1 to 3, the gas injection molding machine for injection of the present invention, the nozzle 100 formed in communication with the injection hole 510 of the mold 500; A molten resin supply pipe 200 formed in communication with the nozzle 100 to supply molten resin W; A mixing unit (300) formed between the nozzle (100) and the molten resin supply pipe (200), the venturi (310) having an inner diameter thereof reduced and expanded therebetween; Technically, the gas supply pipe 400 is formed in communication with the stopper 310 of the mixing part 300 to supply the gas G for mixing.

이하, 도 1 내지 도 3을 참조하여 본 발명의 작용을 설명하면 다음과 같다.Hereinafter, the operation of the present invention will be described with reference to FIGS. 1 to 3.

상기와 같이 구성된 본 발명의 가스 혼합 사출용 사출성형기는 도 1에 도시된 바와 같이, 사출성형하고자 하는 제품의 형상으로 음각된 금형(500)이 일측에 마련되어 있으며, 상기 금형(500)에는 사출성형물의 재료가 공급되어 충진될 수 있도록 주입구(510)가 연통 형성되어 있다.As shown in FIG. 1, the gas injection molding machine for injection of the present invention configured as described above is provided with a mold 500 engraved in a shape of a product to be injection molded on one side, and the injection molding product is provided on the mold 500. The injection hole 510 is formed so that the material can be supplied and filled.

이때, 상기 금형(500)에 주입될 사출성형물의 재료인 용융수지(W)와 가스(G)는 도 2에 도시된 바와 같이, 각각 용융수지공급관(200) 및 가스공급관(400)을 통하여 혼합부(300)에서 혼합된 후, 상기 금형(500)의 주입구(510)와 연통 형성된 노즐(100)을 통하여 상기 금형(500)의 내부로 주입되는 것이다.At this time, the molten resin (W) and the gas (G), which is the material of the injection molding to be injected into the mold 500 is mixed through the molten resin supply pipe 200 and the gas supply pipe 400, respectively, as shown in FIG. After mixing in the unit 300, it is injected into the mold 500 through the nozzle 100 formed in communication with the injection hole 510 of the mold 500.

상기 혼합부(300)에는 사출성형물의 재료인 용융수지(W)와 가스(G)를 고르게 혼합시켜주기 위하여 벤추리(310)가 마련되어 있으며, 상기 벤추리(310)는 중단에서 내경이 축소하였다가 확장되는 형상으로 성형되어 있기 때문에, 도 3에 도시된 바와 같이, 상기 용융수지공급관(200)을 통하여 공급되는 용융수지(W)가 상기 벤추리(310)를 통과하게 될 때, 상기 벤추리(310)에서는 용융수지(W)의 속도가 급격히 증가하게 되는 동시에, 압력은 급격히 감소하게 된다.The mixing unit 300 is provided with a venturi 310 to uniformly mix the molten resin (W) and the gas (G), which is the material of the injection molding, the venturi 310 is reduced in the inner diameter at the stop and then expanded Since it is molded in the shape, as shown in Figure 3, when the molten resin (W) supplied through the molten resin supply pipe 200 passes through the venturi 310, in the venturi 310 While the speed of the molten resin W increases rapidly, the pressure decreases rapidly.

따라서, 상기 벤추리(310)에서 발생한 급격한 압력 저하에 의하여 상기 가스공급관(400)을 통하여 공급되는 가스(G)는 상기 벤추리(310)에서 용융수지(W)와 고르게 혼합될 수 있는 것이다.Therefore, the gas G supplied through the gas supply pipe 400 may be evenly mixed with the molten resin W in the venturi 310 due to a sudden pressure drop generated in the venturi 310.

이후, 상기와 같이 고르게 혼합된 사출성형 재료인 용융수지(W)와 가스(G)는 노즐(100)을 통하여 상기 금형(100)의 주입구(110)로 주입됨으로써, 양질의 성형물을 제조 가능한 것이다.Thereafter, the molten resin (W) and the gas (G), which are the injection molding materials mixed evenly, are injected into the injection hole (110) of the mold (100) through the nozzle (100), thereby producing a high-quality molded product. .

이때, 상기 가스공급관(400)의 중단에는 도 1에 도시된 바와 같이, 가스제어장치(410)를 추가 구성하여 상기 가스공급관(400)으로 공급되는 혼합용 가스(G)의 양을 제어 가능하도록 할 수도 있다.In this case, as shown in FIG. 1, a gas control device 410 is further configured to stop the gas supply pipe 400 so as to control the amount of the gas G for mixing supplied to the gas supply pipe 400. You may.

상기와 같이, 상기 가스제어장치(410)가 상기 가스공급관(400)으로 공급되는 가스(G)의 양을 제어할 수 있도록 함으로써, 사출성형물에 포함되는 가스(G)의 함유량을 작업자가 용이하게 조절할 수도 있다.As described above, by allowing the gas control device 410 to control the amount of the gas (G) supplied to the gas supply pipe 400, the operator can easily determine the content of the gas (G) contained in the injection molding. You can also adjust.

따라서, 상기와 같이 혼합부(300)에 마련된 벤추리(310)에서 사출성형물의 재료인 용융수지(W)와 가스(G)를 고르게 혼합하여 사출성형 작업을 수행할 수 있어 양질의 사출성형물을 생산할 수 있을 뿐 아니라, 추가로 구비된 가스제어장치(410)를 통하여 용융수지(W)와 혼합되는 가스(G)의 양을 조절할 수 있어 사출성형물에 포함되는 가스의 양을 용이하게 제어 가능한 장점이 있다.Therefore, in the venturi 310 provided in the mixing unit 300 as described above, the injection molding may be performed by uniformly mixing the molten resin (W) and the gas (G), which are the materials of the injection molding, to produce a high-quality injection molding product. In addition, it is possible to adjust the amount of the gas (G) mixed with the molten resin (W) through the additionally provided gas control device 410 has the advantage that can easily control the amount of gas contained in the injection molding have.

이상과 같은 본 발명은 가스 혼합 사출용 사출성형기를 개선시켜 금형에 주입되는 용융수지에 가스가 고르게 혼합되도록 할 수 있는 동시에, 용융수지에 혼합되는 가스의 양을 조절할 수 있기 때문에 양질의 사출성형물을 얻을 수 있는 발명인 것이다.As described above, the present invention improves the injection molding machine for gas mixture injection so that the gas is evenly mixed with the molten resin injected into the mold, and at the same time, the amount of the gas mixed into the molten resin can be adjusted to produce a high quality injection molding product. It is an invention that can be obtained.

도 1은 본 발명의 가스 혼합 사출용 사출성형기를 도시하는 개략적인 1 is a schematic view showing an injection molding machine for gas mixture injection of the present invention

구성도,       Diagram,

도 2는 본 발명의 가스 혼합 사출용 사출성형기의 요부를 도시하는 단면도,2 is a cross-sectional view showing the main parts of an injection molding machine for gas mixture injection of the present invention;

도 3은 본 발명의 가스 혼합 사출용 사출성형기에 대한 혼합부를 도시하는 Figure 3 shows a mixing section for the injection molding machine for gas mixture injection of the present invention

단면도.       Cross-section.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100 : 노즐 200 : 용융수지공급관100: nozzle 200: molten resin supply pipe

300 : 혼합부 310 : 벤추리300: mixing section 310: Venturi

400 : 가스공급관 410 : 가스제어장치400: gas supply pipe 410: gas control device

500 : 금형 510 : 주입구500: mold 510: injection hole

W : 용융수지 G : 가스W: molten resin G: gas

Claims (2)

삭제delete 금형의 주입구와 연통 형성된 노즐과;A nozzle in communication with the inlet of the mold; 상기 노즐에 연통 형성되어 용융수지가 공급되는 용융수지공급관과;A molten resin supply pipe communicating with the nozzle and supplied with a molten resin; 상기 노즐과 용융수지공급관 사이에 위치하여 내경이 축소되었다가 확장되는 벤추리가 형성된 혼합부와;A mixing unit having a venturi formed between the nozzle and the molten resin supply pipe, the inner diameter of which is reduced and then expanded; 상기 혼합부의 벤추리 중단과 연통 형성되어 혼합용 가스를 공급하는 가스공급관으로 구성되되;Is formed in communication with the venturi stop of the mixing portion is composed of a gas supply pipe for supplying a gas for mixing; 상기 가스공급관 중단에는 가스제어장치가 추가 구성되어 상기 가스공급관으로 공급되는 혼합용 가스의 양을 제어 가능한 것을 특징으로 하는 가스 혼합 사출용 사출성형기. A gas control device is further configured to stop the gas supply pipe to control the amount of the gas for mixing supplied to the gas supply pipe.
KR10-2002-0047701A 2002-08-13 2002-08-13 Injection molder for mixing gas Expired - Fee Related KR100497970B1 (en)

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Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH0210017U (en) * 1988-06-28 1990-01-23
JPH03133618A (en) * 1989-10-20 1991-06-06 Mitsubishi Heavy Ind Ltd Molding method for plastic molded product
JPH0691686A (en) * 1992-09-14 1994-04-05 Taiho Kogyo Kk Gas injection molding, gas injection molding method and gas injection device
JPH07117071A (en) * 1993-10-22 1995-05-09 Taiyo Yuden Co Ltd Injection molding method and apparatus
JP2000025066A (en) * 1998-07-15 2000-01-25 Sato Seiki:Kk Injection apparatus and method for injection molding
KR20020038378A (en) * 2000-11-17 2002-05-23 구자홍 A Bubble Outbreak Device and a Method for Plastic

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0210017U (en) * 1988-06-28 1990-01-23
JPH03133618A (en) * 1989-10-20 1991-06-06 Mitsubishi Heavy Ind Ltd Molding method for plastic molded product
JPH0691686A (en) * 1992-09-14 1994-04-05 Taiho Kogyo Kk Gas injection molding, gas injection molding method and gas injection device
JPH07117071A (en) * 1993-10-22 1995-05-09 Taiyo Yuden Co Ltd Injection molding method and apparatus
JP2000025066A (en) * 1998-07-15 2000-01-25 Sato Seiki:Kk Injection apparatus and method for injection molding
KR20020038378A (en) * 2000-11-17 2002-05-23 구자홍 A Bubble Outbreak Device and a Method for Plastic

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