Method for balloon blown plastic molding

Details Method for balloon blown plastic molding Method for balloon blown plastic molding

1974-03-18

1976-03-16

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264 90, 264 97, 264314, 264335, 264DIG78, B29C 1706, B29C 1707, B29C 2500

Patent

active

039446450

ABSTRACT:
This invention is a method of making blown plastic articles on an injection blow molding machine with an expandible balloon that covers the core rods and over which a parison is applied at an injection mold station. The parison can be blown at lower temperatures for better orientation; and the balloon permits circulation of cooling fluid, including liquid, to cool the blown article from the inside while contact with the blow mold cavity cools the blown article from the outside.

REFERENCES:
patent: 720718 (1903-02-01), Maddock et al.
patent: 2331702 (1943-10-01), Kopitke
patent: 2410936 (1946-11-01), Gronemeyer et al.
patent: 2644198 (1953-07-01), Crawford
patent: 2792593 (1957-05-01), Hardgrove, Jr.
patent: 3032823 (1962-05-01), Sherman
patent: 3337666 (1967-08-01), Wilkins
patent: 3470282 (1969-09-01), Scalora
patent: 3607998 (1971-09-01), Goodridge
patent: 3707591 (1972-12-01), Chalfant

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