Blow molding apparatus

Details Blow molding apparatus Blow molding apparatus

1989-09-26

1991-05-21

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

With heating or cooling means

264535, B29C 4964

Patent

active

050171267

ABSTRACT:
An apparatus for blow-molding a hollow double wall type article using 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 a reinforcing block 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 block may be formed 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.

REFERENCES:
patent: 2767449 (1956-10-01), Tueth
patent: 2907070 (1959-10-01), Van Hartesveldt
patent: 3289257 (1966-12-01), Richards
patent: 3932096 (1976-01-01), Kartman
patent: 4872827 (1989-10-01), Noda

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