Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1997-09-05
2000-01-11
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
2643289, 26432812, 425573, B29C 4520
Patent
active
060132191
ABSTRACT:
A method and apparatus for injection molding a plastic cover. The method includes the steps of forming a mold having a relatively thin-walled, circular cross-sectional molding area concentric with and along a predominant axis of the mold and of a graded generally decreasing diameter of the cross-sectional molding area from a first end to a second end of the mold along the predominant axis, providing a plurality of passageways in the mold from a periphery of the circular cross-sectional molding area at the second end to an exterior of the mold, and filling the mold through the plurality of passageways.
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