Method of dyeing or reforming injection, blow or compression...

Details Method of dyeing or reforming injection, blow or compression... Method of dyeing or reforming injection, blow or compression...

2005-04-25

2009-06-23

Meeks, Timothy H (Department: 1792)

Coating processes

Coating by vapor, gas, or smoke

C264S320000, C264S328100

Reexamination Certificate

active

07550178

ABSTRACT:
A molding method providing a homogeneous surface without any patch by dyeing or reforming a resin surface in a die concurrently to molding, in injection-, blow-, or compression molding, after thermoplastic resin is filled in a die cavity. After blow-molding, or after compression molding, mixture gas of carbon dioxide gas and a dye, or mixture gas of carbon dioxide gas and a reformer is injected between the resin and the die for forming a clearance, and pressure of the mixture gas is kept at a constant level. The mixture gas is dissolved in a molded surface, and a pressure is applied to contact the molded surface to the cavity face. The mixture gas in the clearance is exhausted and cooled, and the molded product is taken out. A dye-permeated layer or a reformer-permeated layer is formed on a surface of the molded product.

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