Scrapless forming of plastic articles

Details Scrapless forming of plastic articles Scrapless forming of plastic articles

1974-01-14

1976-03-30

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

425326R, 425398, 425388, 425394, 425406, 425412, 425384, 4254519, B29C 300, B29C 1700

Patent

active

039472043

ABSTRACT:
Apparatus for rapidly making thermoplastic containers wherein the resultant containers can, if desired, be multilayered for vapor or gas barrier or other reasons, or be oriented for toughness and improved stress crack resistance. The apparatus takes a measured amount of thermoplastic material which is lubricated, heated and forged into a desired shape preform with a predetermined lip configuration. The center portion of each said preform is maintained at a forming temperature while the peripheral portion thereof is clamped and rapidly brought below the softening point of the plastic resin. The preform can then be immediately thermoformed into a container having a desired shape and size, and cooled. If desired, the preform can be forged, cooled and recovered for a subsequent thermoforming operation or can be a finished article itself.

REFERENCES:
patent: 2541923 (1951-02-01), Huxham
patent: 3271501 (1966-09-01), Heck
patent: 3324511 (1967-06-01), Macai et al.
patent: 3488805 (1970-01-01), Biglin et al.
patent: 3551954 (1971-01-01), Knowles
patent: 3695806 (1972-10-01), Arfert

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