Apparatus for pre-heating thermoplastic parisons

Details Apparatus for pre-heating thermoplastic parisons Apparatus for pre-heating thermoplastic parisons

1980-01-28

1981-05-26

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

For hollow article

34169, 34182, 264535, 425445, F26B 1312

Patent

active

042689759

ABSTRACT:
This invention relates to an apparatus for effecting the uniform pre-heating of thermoplastic parisons of the type that are introduced into a blow molding machine for fabrication into a blow molded article. The invention provides a hopper which is intermittently supplied with batches of parisons and through which the parisons move by gravity. A convection heating zone is provided in the hopper to uniformly heat each parison passing therethrough, and a temperature equalization zone is provided adjacent to the heating zone. The parisons are removed from the temperature equalization zone by a continuously moving parison conveyor which forms part of the temperature equalization zone.

REFERENCES:
patent: 2163556 (1939-06-01), Glaze
patent: 2876557 (1959-03-01), Ducatteau
patent: 4117050 (1978-09-01), Appel et al.

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