[특허]Method of coinjection molding of thermoplastic and thermoplastic elastomer

Method of coinjection molding of thermoplastic and thermoplastic elastomer 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29H-003/08
출원번호	US-0198792 (1980-10-20)
발명자 / 주소	Salerno, Charles M. Hamilton, Harold V. Schubert, Dale W.
출원인 / 주소	Barry Wright Corporation
대리인 / 주소	Gilbert, Milton E.Ross, Gary E.
인용정보	피인용 횟수 : 59 인용 특허 : 0

초록 ▼

Vibration isolators are manufactured by a co-injection molding process. Outer and inner parts of the isolators are molded first from a rigid or stiff thermoplastic material such as polystyrene and intermediate spring-like parts of the isolators are made of a thermoplastic elastomer such as copolymer

대표청구항 ▼

1. A method of producing a vibration isolator having (a) first and second concentric and mutually spaced parts molded of a substantially rigid thermoplastic material, and (b) a third part molded of a thermoplastic elastomer material and extending between and bonded to said first and second parts, said method comprising: (a) injection molding said first and second parts simultaneously in first and second mold cavities respectively; and (b) injection molding said third part between said first and second parts so that said thermoplastic elastomer material of which said third part is molded will fusion bond directly to the thermoplastic material of which said first and second parts are made. 2. A method according to claim 1 wherein said first and second parts are made of polystyrene. 3. A method according to claim 1 wherein said third part is made of a copolymer of styrene and butadiene. 4. The method of claim 1 further comprising the step of opening the mold so as to form a third mold cavity, disposed between said first and second parts and wherein said third part is molded within said third cavity. 5. A method according to claim 1 or 4 wherein said third part is molded after said thermoplastic polymer material has set up but before it has reached its maximum hardness. 6. The method of claim 4 in which the injection molding of said third part occurs less than three seconds after the injection molding of said first and second parts. 7. A method of molding a device having a first part molded of a substantially rigid thermoplastic material, and a second part molded of a thermoplastic elastomer material fusion bonded to said first part, said method comprising the following steps: (a) closing a movable mold, to a first position in which a first cavity is formed; (b) injection molding said first part in said first mold cavity while said mold is in said first position; (c) opening the mold to a second position in which a second cavity is formed adjacent and in communication with the first cavity; (d) injection molding said second part in said second mold cavity while said mold is in said second position, so that said thermoplastic elastomer material of which said second part is molded will fusion bond directly to the thermoplastic material of which said first part is made; and (e) opening the mold to a third position in which the parts can be removed. 8. A method of claim 7 wherein the mold comprises two opposing mold members between which said first and second cavities are formed, said mold members being movable toward or away from one another, and wherein the opening steps each comprise separating said mold members from one another. 9. A method according to claim 7 wherein said opening of the mold to a second position is performed after said thermoplastic, non-elastomer material has set up but before it has reached its maximum hardness. 10. A method of molding a device having a first part molded of substantially rigid thermoplastic material, and a second part molded of thermoplastic elastomer material bonded to said first part, said mold including a first mold member and a second mold member, said first mold member being movably disposed relative to the second mold member, said method comprising the following steps: (a). forming a first mold cavity between the mold members; (b). after step (a), injection molding the thermoplastic material of said first part in said first mold cavity; (c). after step (b), forming a second mold cavity defind between the mold and the thermoplastic material in said first mold cavity; and (d). after step (c), injection molding the thermoplastic elastomer of said second part in said second mold cavity thereby fusion bonding the thermoplastic elastomer material of said second part directly to the thermoplastic material of said first part. 11. The method of claim 10 wherein the forming of the first mold cavity includes the step of moving the first mold member to a first position, and the forming of the second mold cavity includes the step of moving the first mold member to a second position; and further comprising, after the thermo-elastomer of said second part has set-up, moving the first mold member to a third position in which the parts are accessible for removal from the mold. 12. The method of claim 10 wherein the forming of the second mold cavity is performed after the thermoplastic material in the first mold cavity has set-up. 13. The method of claim 12 wherein the injection molding of the thermoplastic elastomer in the second mold is performed before the thermoplastic material in the first mold cavity has reached maximum hardness. 14. The method of claim 10 further comprising the initial step of closing the mold by moving the first mold member towards the second mold member, and wherein the second mold cavity is formed by retracting the first mold member from the second mold member, with said second mold cavity defined by said first and second mold members and said thermoplastic material in the first cavity.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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연합인증

Method of coinjection molding of thermoplastic and thermoplastic elastomer 원문보기

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Method of coinjection molding of thermoplastic and thermoplastic elastomer 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (59)

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