Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1993-12-02
1995-11-28
Aftergut, Karen
Metal working
Method of mechanical manufacture
Assembling or joining
295271, 215396, 264296, 264534, 425525, B29C 4908, B29D 2200, B65D 2310
Patent
active
054696127
ABSTRACT:
A method of making a blow-molded container from a strain-hardenable polymer, the container having deep recesses for secure "post mold" attachment of a handle. The container is formed in a modified blow mold having retractable blades. The blades are partially extended for blow molding partial recesses, and then further extended for mechanically forming the deep handle recesses. The mechanical forming operation overcomes the stretch limits imposed by strain-hardening of the plastic material during blow molding, and the "post-mold" attachment of the handle provides a reduced cycle time and lower level of defects compared to the known "in-mold" handle forming operations.
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Collette Wayne N.
Krishnakumar Suppayan M.
Aftergut Karen
Continental PET Technologies Inc.
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