B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/531
B29C 49/64 (2006.01) B29B 13/02 (2006.01) B29C 33/04 (2006.01) B29C 33/56 (2006.01) B29C 35/16 (2006.01) B29C 49/48 (2006.01) B29C 33/38 (2006.01) B29C 35/08 (2006.01)
Patent
CA 1330154
- 28 - BLOW MOLDING APPARATUS AND PROCESS ABSTRACT OF THE DISCLOSURE A process of blow-molding a hollow double wall type article uses a mold incorporated with a heating and cooling system. The mold consists of male and female mold halves, each composed of an outer shell area having a contoured cavity surface part and an inner heat insulating area defined within the outer shell area. The cavity surface part is made of mainly of a metallic material having a high thermal conductivity, and the inner heat insulating area is provided therein with means for reinforcing the outer shell area against a blow molding pressure and a mold clamping pressure. The inner heat insulating area provides a substantial thermal insulation against a transmission of heat thereto from the cavity surface part. The reinforcing means may be formed by a block of a non-metallic material having a low thermal conductivity. Preferably, the block is permeably porous so that it provides heat medium passages for the heating and cooling system.
613617
Kanoh Yoshiaki
Yamada Akiyoshi
Goudreau Gage Dubuc
Ube Industries Ltd.
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