KR950000359A - Injection molding method and injection molding apparatus for thermoplastic resin molded products - Google Patents

Injection molding method and injection molding apparatus for thermoplastic resin molded products Download PDF

Info

Publication number
KR950000359A
KR950000359A KR1019930010803A KR930010803A KR950000359A KR 950000359 A KR950000359 A KR 950000359A KR 1019930010803 A KR1019930010803 A KR 1019930010803A KR 930010803 A KR930010803 A KR 930010803A KR 950000359 A KR950000359 A KR 950000359A
Authority
KR
South Korea
Prior art keywords
resin
injection
thermoplastic resin
blowing agent
injection molding
Prior art date
Application number
KR1019930010803A
Other languages
Korean (ko)
Other versions
KR960014538B1 (en
Inventor
우상선
김대식
김재환
Original Assignee
채오병
제일모직 주식회사
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 채오병, 제일모직 주식회사 filed Critical 채오병
Priority to KR1019930010803A priority Critical patent/KR960014538B1/en
Priority to JP12852994A priority patent/JPH0822558B2/en
Publication of KR950000359A publication Critical patent/KR950000359A/en
Application granted granted Critical
Publication of KR960014538B1 publication Critical patent/KR960014538B1/en

Links

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

본 발명은 열가소성 수지셩형품의 사출성형법 및 사출성형장치에 관한 것이다.The present invention relates to an injection molding method and an injection molding apparatus for thermoplastic resin molded articles.

본 발명은 상기와 같은 종래 방법의 문제점을 해결하기 위한 것으로, 간단한 방법으로 성형체의 표면에 씽크마크, 뒤틀림, 줄무늬 등과 같은 결함의 발생을 방지할 수 있는 성형방법과 그 장치를 제공하는 것을 목적으로 한다.The present invention is to solve the problems of the conventional method as described above, and to provide a molding method and apparatus that can prevent the occurrence of defects, such as think marks, distortions, streaks, etc. on the surface of the molded body by a simple method. do.

본 발명의 제조방법은 두꺼운 부분을 포함하는 열가소성 수지의 성형에 있어서, 주사 핀(Pin)으로 금형에 형성된 주사 홀(Hole)로 삽입시켜 수지 내부에 액상 발포제를 주입시키고, 주입된 액상 발포제가 수지의 잔존역에 의하여 발포되어 수지 내부에 동공을 형성시키는 것을 특징으로 하며, 본 발명의 제조장치는 금형의 고정부 또는 이동부에 가는 주사 핀(25)이 통과할 수 있는 주사 홀(26)이 형성된 것을 특징으로 한다.In the manufacturing method of the present invention, in the molding of a thermoplastic resin including a thick portion, the injection pin is inserted into the injection hole (Hole) formed in the mold to inject a liquid blowing agent into the resin, and the injected liquid blowing agent is a resin. It is foamed by the remaining area of the to form a pupil in the resin, characterized in that, the manufacturing apparatus of the present invention is a scanning hole 26 that can pass through the scanning pin 25 going to the fixed part or the moving part of the mold Characterized in that formed.

Description

열가소성 수지성형품의 사출성형법 및 사출성형장치Injection molding method and injection molding apparatus for thermoplastic resin molded products

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 의한 사출성형품의 한 예를 나타내는 사시도이고, 제2도는 본 발명의 방법에 사용되는 금형 및 장치 단면도이고, 제3도는 액상 발포제를 주사하는 순간의 단면도이고, 제4도는 주사장치를 이탈시킨 후 액상 발포제가 발포하는 것을 설명하기 위한 단면도이고, 제5도는 액상 발포제의 투입량과 동공의 크기와의 관계를 나타내는 그래프이고, 제6도는 수지 충전량과 동공의 크기와의 관계를 나타내는 그래프(액상발포제 일정량 투입시)이다.1 is a perspective view showing an example of an injection molded article according to the present invention, FIG. 2 is a cross-sectional view of a mold and a device used in the method of the present invention, FIG. 3 is a cross-sectional view at the moment of injecting a liquid blowing agent, and FIG. Figure 5 is a cross-sectional view for explaining the foaming of the liquid blowing agent after leaving the device, Figure 5 is a graph showing the relationship between the injection amount of the liquid blowing agent and the size of the pupil, Figure 6 is a relationship between the amount of resin filling and the size of the pupil It is a graph (when a certain amount of liquid foaming agent is added).

Claims (13)

두꺼운 부분을 포함하는 열가소성 수지의 성형에 있어서, 주사 핀(Pin)으로 금형에 형성된 주사 홀(Hole)로 삽입시켜 수지 내부에 액상 발포제를 주입시키고, 주입된 액상 발포제가 수지의 잔존열에 의하여 발포되어 수지 내부에 동공을 형성시키는 것을 특징으로 하는 열가소성 수지의 성형방법.In molding a thermoplastic resin including a thick portion, the injection pin is inserted into a scanning hole formed in a mold to inject a liquid blowing agent into the resin, and the injected liquid blowing agent is foamed by the residual heat of the resin. A molding method of a thermoplastic resin, wherein a pupil is formed inside the resin. 제1항에 있어서, 삽입된 주사 핀은 액상 발포제를 주입시킨 후 즉시 금형 외부로 빠져 나와 원위치 되는것을 특징으로 하는 열가소성 수지의 성형방법.The method of forming a thermoplastic resin according to claim 1, wherein the inserted injection pin exits the mold immediately after injecting the liquid blowing agent and returns to the original position. 제1항에 있어서, 액상 발포제의 주입시키는 수지 충전중 또는 수지충전 직후인 것을 특징으로 하는 열가소성 수지의 성형방법.2. The method for molding a thermoplastic resin according to claim 1, wherein the thermoplastic resin is injected during or immediately after the resin is injected. 제1항에 있어서, 액상 발포제의 주입시간은 5초 이내인 것을 특징으로 하는 열가소성 수지의 성형방법.The method of forming a thermoplastic resin according to claim 1, wherein the injection time of the liquid blowing agent is within 5 seconds. 제1항에 있어서, 충전되는 수지는 캐비티(Cavity) 용량의 80 내지 95%인 것을 특징으로 하는 열가소성 수지의 성형방법.The method of claim 1, wherein the resin to be filled is 80 to 95% of the cavity capacity. 제1항에 있어서, 주입된 액상 발포제의 기화에 의한 팽창압력이 수지의 냉각에 의한 수축압력과 상쇄되는것을 특징으로 하는 열가소성 수지의 성형방법.The method of forming a thermoplastic resin according to claim 1, wherein the expansion pressure due to vaporization of the injected liquid blowing agent is canceled from the shrinkage pressure due to cooling of the resin. 제1항에 있어서, 주사 핀이 통과함으로써 수지에 형성된 홀이 수지의 유동성으로 인하여 스스로 메워지는것을 특징으로 하는 열가소성 수지의 성형방법.The molding method of a thermoplastic resin according to claim 1, wherein the hole formed in the resin fills itself due to the fluidity of the resin as the scanning pin passes. 제1항에 있어서, 주사 핀은 액상 발포제를 정량 계량하여 공급하여 주는 정량계량장치 및 정량공급 제어장치와 결합된 것을 특징으로 하는 열가소성 수지의 성형방법.The method of claim 1, wherein the injection pin is combined with a quantitative measuring device and a quantitative supply control device for quantitatively measuring and supplying a liquid blowing agent. 금형의 고정부 또는 이동부에 가는 주사 핀(25)이 통과할 수 있는 주사홀(26)이 형성된 것을 특징으로 하는 사출 성형장치.An injection molding apparatus, characterized in that a scanning hole (26) through which the scanning pin (25) which passes to the fixed part or the moving part of the mold can pass. 제9항에 있어서, 주사 핀(25)은 그 후미에 주사 실린더(24)가 형성되어 있는 것을 특징으로 하는 사출 성형장치.10. The injection molding apparatus according to claim 9, wherein the injection pin (25) has an injection cylinder (24) formed at its rear end. 제9항에 있어서, 주사 핀(25)은 정량 공급 제어장치(23)와 결합된 것을 특징으로 하는 사출 성형장치.10. Injection molding apparatus according to claim 9, characterized in that the injection pin (25) is combined with a metered feed control device (23). 제11항에 있어서, 정량 공급 제어장치(23)는 액상 발포제 정량공급장치(28)와 연결된 것을 특징으로 하는사출 성형장치.12. Injection molding apparatus according to claim 11, characterized in that the metered feed control device (23) is connected with the metered liquid feed agent (28). 제9항에 있어서, 주사 핀(25)은 수지를 관통하여 액상 발포제를 주사할 수 있도록 선단이 뾰족하고 내부에 통로가 있는 것을 특징으로 하는 사출 성형장치.10. The injection molding apparatus according to claim 9, wherein the injection pin (25) has a pointed tip and a passage therein for injecting the liquid blowing agent through the resin. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930010803A 1993-06-14 1993-06-14 Injection forming method and apparatus for thermosetting resin articles KR960014538B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019930010803A KR960014538B1 (en) 1993-06-14 1993-06-14 Injection forming method and apparatus for thermosetting resin articles
JP12852994A JPH0822558B2 (en) 1993-06-14 1994-06-10 Injection molding method and injection molding apparatus for thermoplastic resin molded article

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930010803A KR960014538B1 (en) 1993-06-14 1993-06-14 Injection forming method and apparatus for thermosetting resin articles

Publications (2)

Publication Number Publication Date
KR950000359A true KR950000359A (en) 1995-01-03
KR960014538B1 KR960014538B1 (en) 1996-10-16

Family

ID=19357358

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930010803A KR960014538B1 (en) 1993-06-14 1993-06-14 Injection forming method and apparatus for thermosetting resin articles

Country Status (2)

Country Link
JP (1) JPH0822558B2 (en)
KR (1) KR960014538B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100482427B1 (en) * 2003-12-19 2005-04-14 박장원 Crosslinked foam which has inner-cavity structure, and process of forming thereof
KR100980836B1 (en) * 2010-05-11 2010-09-10 화인케미칼 주식회사 Method for manufacturing an air-holed foam tire and structure thereof

Also Published As

Publication number Publication date
JPH07137078A (en) 1995-05-30
KR960014538B1 (en) 1996-10-16
JPH0822558B2 (en) 1996-03-06

Similar Documents

Publication Publication Date Title
HK1011636A1 (en) Opposed gating injection method
KR900701499A (en) Injection molding method and apparatus
WO1990000466A1 (en) Process for injection molding and hollow plastic article produced thereby
DE69526868D1 (en) INJECTION MOLDING DEVICE WITH A VALVE OPENING TYPE
DE3260413D1 (en) Stabilized core injection molding of plastic
ATE220608T1 (en) METHOD AND DEVICE FOR INJECTION MOLDING PLASTIC MOLDED PARTS MADE OF THERMOPLASTIC PLASTIC
KR920014592A (en) Injection Molding Method and Injection Molding Mold of Thermoplastic Resin
KR920016226A (en) Method of Manufacturing Blow Molded Products
CA2110717C (en) Process for injection molding a hollow plastic article
KR950012850B1 (en) Injection molding method
JP2960256B2 (en) Injection molding method and injection mold
JPS55291A (en) Production of form product
KR950000359A (en) Injection molding method and injection molding apparatus for thermoplastic resin molded products
KR930007833A (en) Glass Forming Apparatus and Forming Method
JPH03274120A (en) Hollow molding method for plastic
EP0714745B1 (en) Apparatus and process for injection molding a thermoplastic resin article
JPS6258293B2 (en)
KR960013627A (en) Gas injection molding apparatus and method
WO2004048068B1 (en) Method for retrofitting existing molds for use with an in-mold coating system
JPH0211311A (en) Mold for injection molding
KR0126976Y1 (en) Gas-injection molding apparatus
JP2960472B2 (en) Temperature measuring device for molten polymer in injection molding
JPS5590334A (en) Molding method of foamed product
JPH03138122A (en) Molding process for thick wall molded product and its molding device
JP3980192B2 (en) Molding method and molded product

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20081001

Year of fee payment: 13

LAPS Lapse due to unpaid annual fee