Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Simultaneous severing and shaping – or severing while work...
Patent
1988-08-15
1989-11-14
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Simultaneous severing and shaping, or severing while work...
264245, 264255, 264302, 264309, B28B 714, B29C 3912, B29C 4108, B29C 4118
Patent
active
048805882
ABSTRACT:
A method for manufacturing decorative features in situ in a base layer cast plastic material includes the steps of providing a mold tool having a surface thereon which is recessed in the form of a desired decorative feature and includes a sharp break line between the recess and the surrounding mold surface; depositing a covering of thermoplastic material in the recess surface and heating the tool to melt the thermoplastic material on the recess surface to form segments of plastic corresponding to the desired decorative feature; thereafter cooling the covering and stripping it from the mold by separating it at the sharp break line interface between the deposited material on the recessed surface and a thin film membrane formed on the remainder of the mold surface so as to retain segments of material deposited in the recesses of the mold tool; reheating the mold tool recess to partially remelt the retained segments and thereafter depositing a base layer of thermoplastic material across the surface of the mold and reheating the mold to bond the retained segments to the base layer and cooling and stripping the mold to form a finished plastic shell having a decorative feature formed in situ therein.
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Brault Alfred F.
Gray John D.
Davidson Textron Inc.
Evans John C.
Kutach Karen D.
Silbaugh Jan H.
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