B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1103
B29C 41/22 (2006.01) B29C 33/00 (2006.01) B29C 37/00 (2006.01) B29C 41/18 (2006.01) B29C 41/38 (2006.01)
Patent
CA 1311895
APPARATUS FOR MOLDING TWO-TONE COLORED PLASTIC SHELLS ABSTRACT Apparatus for manufacturing thin-walled hollow shells for parts such as automobile door panels, control and instrument panels and the like includes a charge box or powder box for supplying dry thermoplastic material to separate casting surfaces on a heated mold selectively connected to the charge box during a casting process. A selectively pressurizable inflatable seal gasket is connected to the charge box for sealing a division surface on the heated mold which surface separates the casting surfaces of the mold. The inflatable seal gasket includes a base portion fixed to the charge box; an inflatable core with expandable walls to bridge the distance between the charge box and the division surface and a seal bead that sealingly engages the division surface when the seal gasket is inflated to keep the division surface clean for a subsequent application of material to form a connector bond between previously cast two tone colored segments.
593028
Davidson Textron Inc.
Macrae & Co.
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