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특허 상세정보

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Multi-cavity, co-injection molding apparatus

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-045/16   
미국특허분류(USC) 425/130 ; 425/547 ; 425/559 ; 425/564
출원번호 US-0523260 (1990-05-14)
우선권정보 GB-0016460 (1986-07-05)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 63  인용 특허 : 3
초록
▼

An injection moulding apparatus (10) includes similar co-injection modules (12) each provided with common supplies (238-242) and supplied with different polymer materials at intermediate pressure by common plasticisers (14-18). Each module has a co-injection nozzle assembly (70) in wich each nozzle (148-154) is supplied with polymer at injection pressure by an injector (208) which receives polymer through a non-return valve (220). The injector is mounted alongside the nozzle on a polymer transfer plate (138-146), and has the position of its piston (212) ...

대표
청구항
▼

A multi-cavity, co-injection molding apparatus comprising: (1) a plurality of similar modules, each of which comprises: (a) a polymer injection mold defining an injection molding cavity; (b) a co-injection nozzle incorporating a gate opening in communication with said mold cavity, and a polymer flow chamber extending from said gate opening and defined by an annular chamber wall; (c) an elongate gate member slidably supported for longitudinal movement in said nozzle and extending through said polymer flow chamber with uniform circumferential clearance fro...

이 특허에 인용된 특허 (3)

  1. Schad Robert D. (Toronto CAX) Brown Paul P. (Orangeville CAX). Coinjection of hollow articles and preforms. USP1988014717324.
  2. Krishnakumar Suppayan M. (Nashua NH) Nahill Thomas E. (Salem NH). Preform with internal barrier and products made from the same. USP1988114781954.
  3. Sokolow ; Nickolas N.. Sequential co-injection unit adapted for structural foam molding. USP1978114124308.

이 특허를 인용한 특허 피인용횟수: 63

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