Manufacturing method for resin part of vehicular lamp
AssigneeKoito Manufacturing Co., Ltd.
InventorsMamoru Kosuge, Makoto Sano, Masaru Takiguchi
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Abstract
A resin part of a vehicular lamp and a method for producing such a part in which a metallic vapor deposition coating for forming a reflective surface is formed directly on a surface of a resin body part without applying an undercoating layer. The body of the resin part is produced by injecting molten resin into a cavity of a molding die in which a heat insulating layer is formed on a portion of the cavity surface corresponding to the reflective surface. A metallic vapor deposition coating is applied directly to the portions of the body of the resin part which were in contact with the heat insulating layer during injection molding.
Claims10
A manufacturing method for a resin part of a vehicular lamp, said resin part having a reflective surface on at least one portion thereof, said method comprising:
- providing a molding die having a cavity for molding a body of said resin part, said molding die comprising a heat insulating layer formed on portions of a surface of said cavity corresponding to said reflective surface of said resin part;
- injecting molten resin into said cavity of said molding die;
- removing the molded body of said resin part from said molding die;
- and
- applying a metallic vapor deposition coating directly to a surface of said molded body of said resin part molded in contact with said heat insulating layer to form the reflective surface.
- wherein said cavity surface on which said heat insulating layer is formed comprises a portion of a nested die to be fitted into a mold part;
- and
- further comprising forming a peeling layer on said heat insulating layer.
Dependencies are inferred from the claim text.