Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1991-03-01
1992-09-08
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
26432812, 264335, 425556, 425570, 425573, 425577, 425437, 425438, B29C 4522, B29C 4536, B29C 4543
Patent
active
051456303
ABSTRACT:
A process and apparatus for injection molding thin-walled plastic articles having comparatively thick lip portion. The apparatus has a mold cavity and a mold core defining a cavity space in the shape of the article and at least one injection gate adjacent a portion of the cavity space defining the lip portion through which molded plastic is injected into the cavity space. The direct lip gating approaches employed in the apparatus do not sacrifice core/cavity alignment and conventional mold motions along the machine axis and form plastic articles having substantially no gate vestiges on the lip sealing surface or on the outer perimeter of the lip.
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Heitbrink Jill L.
Husky Injection Molding Systems Ltd.
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