Hollow article forming apparatus

Details Hollow article forming apparatus Hollow article forming apparatus

1982-09-16

1985-07-16

Silbaugh, Jan

Plastic article or earthenware shaping or treating: apparatus

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

Including means to prepare parison

425145, 425147, 425166, 425533, 425534, 425538, 425258, 425447, B29C 1707

Patent

active

045293724

ABSTRACT:
Apparatus and method for forming hollow articles from plasticized materials are disclosed. A preform is partially formed under substantially no pressure on a preform core by introducing the core into a void-free charge of plasticized material that is placed in a preform cavity from a source of the plasticized material. After the preform core and preform cavity have moved together to define a preform mold space, the charge of plasticized material is subjected to a pressure forming step to form a completely packed preform on the core. The preform is then blow-molded in a blow cavity by introducing blowing gas into the preform through the preform core. Neck mold structure that strips and releases the formed article from the core is also disclosed.

REFERENCES:
patent: 1945255 (1934-01-01), Camagni
patent: 2313110 (1943-03-01), Wertz
patent: 2981976 (1961-05-01), Maier
patent: 3166025 (1965-01-01), Hulse
patent: 3337910 (1967-08-01), West
patent: 3349155 (1967-10-01), Valyi
patent: 3375553 (1968-04-01), Criss
patent: 3390431 (1968-07-01), Valyi
patent: 3670066 (1972-06-01), Valyi
patent: 3857660 (1974-12-01), Flynn et al.
patent: 3941539 (1976-03-01), Saumsiegle et al.

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