Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1991-06-12
1992-07-21
Lorin, Hubert C.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264266, 264268, 264316, 26432812, B29C 3342, B29C 4514
Patent
active
051320711
ABSTRACT:
Injected fluid plastic material directed to a predetermined side of a film section that is inserted into a mold cavity by utilizing a mold that includes a first mold part with a first mold-cavity section and a second mold part with a second mold-cavity section, a gate with a gate region, and a multitude of specific flow channels in the first mold-cavity section for directing injected plastic material away from the gate region; placing the film section in the second mold-cavity section so that the film section covers an extensive region of both the specific flow channels and the thin mold-cavity region and so that the film section does not cover a first segment of each of the specific flow channels which are closest to the gate region, but does cover a second segment of each of the specific flow channels which is a continuation the first segment of each of the specific flow channels; and injecting the fluid plastic material into the mold-cavity, so that the fluid plastic material flows away form the gate region and along the first segment of each of the specific flow channels until the fluid plastic material meets the film section whereby, because the specific flow channels are located in the first mold section, the fluid plastic material in each of the specific flow channels forces the film section toward the second mold section and the fluid plastic continues to flow along the second segment of each of the specific flow channels and between the first mold-cavity section and the film section, and the fluid plastic continues to flow into the thin mold-cavity region in a generally lateral direction from each of the specific flow channels, so that the fluid plastic material flows between the first mold-cavity section and the inserted film section.
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Callan Edward W.
Lorin Hubert C.
Ortiz A. Y.
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