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특허 상세정보

Method of manufacturing multiple-layer molded articles of thermoplastic material

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-067/22   
미국특허분류(USC) 264/451 ; 264/50 ; 264/255 ; 264/510
출원번호 US-0581445 (1990-09-12)
우선권정보 EP-0109459 (1987-07-01)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 41  인용 특허 : 0
초록

A method of manufacturing multiple-layer molded articles with an outer skin of compact thermoplastic material and a core of foamed thermoplastic material includes initially introducing the material for the skin into a mold cavity in a quantity sufficient for the desired thickness of the skin and subsequently feeding into the mold cavity the material for the core to which the expanding agent has been added. During and/or after being introduced into the mold cavity, the core material containing expanding agent is temporarily subjected by means of an additi...

대표
청구항

In a method of manufacturing multiple-layer molded articles with an outer skin of compact thermoplastic material and a core of foamed thermoplastic material, wherein the thermoplastic materials are introduced into a mold cavity of a molding tool in quantities required for manufacturing the molded articles, the improvement comprising initially injecting only the compact thermoplastic material for the skin with an injection pressure into the mold cavity in a quantity sufficient for the desired thickness of the skin, uniformly distributing the skin material...

이 특허를 인용한 특허 피인용횟수: 41

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