Apparatus and method for blow-molding

Details Apparatus and method for blow-molding Apparatus and method for blow-molding

B - Operations, Transporting

29

C

18/509

B29C 49/06 (2006.01) B29C 43/36 (2006.01) B29C 49/02 (2006.01)

Patent

CA 1120220

ABSTRACT OF THE DISCLOSURE 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 plasti- cized 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 pre- form 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 dis- closed.

283048

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