B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 69/02 (2006.01) B29C 49/02 (2006.01) B29D 22/00 (2006.01) B29C 49/04 (2006.01) B29C 49/54 (2006.01)
Patent
CA 2387313
A hollow article made of a thermoplastic resin and having both end portions whose wall thickness changes multidirectionally with high accuracy. The hollow article is formed by bringing a cavity of a drawing unit into contact with an outlet gap of an annular orifice nozzle (including an upwardly and downwardly movable core). A nozzle mouthpiece concentrically surrounds the core to form the outlet gap (having a variable gap width). Thermoplastic resin is injected into the cavity through the outlet gap to form one end portion. A tubular parison is drawn and formed while moving the drawing unit apart from the annular orifice. The tubular parison is blow-molded to form the hollow article body. The other end of the hollow article is injection-molded to the desired shape (such as a tri-port CV-joint boot for use in automobiles).
Kawamoto Taro
Sueoka Kazuhiko
Takada Yasuji
Fukoku Co. Ltd.
Kirby Eades Gale Baker
LandOfFree
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