Method for making plastic articles having blown and non-blown po

Details Method for making plastic articles having blown and non-blown po Method for making plastic articles having blown and non-blown po

1974-10-15

1976-09-28

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 98, 264161, 264163, 264296, 425DIG214, 425DIG215, B29C 1707, B29C 1712

Patent

active

039831990

ABSTRACT:
A method particularly adapted for making pinched-shut, non-blown portions of a blown article, e.g. the non-blown handle openings in a blown plastic jug including engaging a localized portion of a blowable shape, which portion corresponds to a non-blown portion of the final blown article, with a blow mold projection prior to complete enclosure of the blown shape in the blow mold. Such engagement fixes the engaged portion to the blow mold for joint displacement during further blow mold closure. This engagement can be obtained by either (1) specifically shaping the blowable shape for engagement by the mold pinching portions or (2) utilizing retractable abutments carried by the mold itself.

REFERENCES:
patent: 3538543 (1970-11-01), Nataf
patent: 3564087 (1971-02-01), Ruekberg
patent: 3740181 (1973-06-01), Uhlig

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