Hollow article forming apparatus
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United States of America Patent
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Jul 16, 1985
Issued Date -
N/A
app pub date -
Sep 16, 1982
filing date -
Jul 23, 1976
priority date (Note) -
Expired
status (Latency Note)
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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.
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