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
Reexamination Certificate
2006-07-04
2006-07-04
Lee, Edmund H. (Department: 1732)
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
C264S247000, C264S275000, C264S278000, C264S328800, C264S255000
Reexamination Certificate
active
07070724
ABSTRACT:
The present invention has an object of eliminating the holding pin trace of a composite-molding of the dichromatic molding by refilling with resin by the pushing pin and preventing the lateral-shift of the primary molding during the refilling. It is made possible to fill closed recess and cavity with resin through a communicating hole formed in the primary molding by the pushing pin. A primary cavity mold11and a secondary cavity mold12are juxtaposed at symmetrical positions of a fixed plate1. Core molds14closing alternately with both thereof are juxtaposed on a rotary table7installed on a movable platen4. Holding pins15of the primary molding30and a resin pushing pin16are installed in the core mold14in a way to appear and disappear in respect to a cavity. The primary molding30is held in contact with the surface of the secondary cavity mold by the holding pin15. A pin hole20for refilling resin is formed to be opened on a surface of the core mold by retracting the pushing pin16. A secondary cavity including the pin hole20is refilled with a different material resin by injection. The holding pin15is retracted and sunk in the surface of the cavity mold. The pushing pin16is moved forward to force the resin for refilling the pin hole20into the resin in the cavity. The regions not filled with resin due to the holding pin15are refilled up.
REFERENCES:
patent: 5030406 (1991-07-01), Sorensen
patent: 5639403 (1997-06-01), Ida et al.
patent: 5695699 (1997-12-01), Naritomi
patent: 6428732 (2002-08-01), Onoue et al.
patent: 8-306718 (1996-11-01), None
Lee Edmund H.
Nissei Plastic Industrial Co. Ltd.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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