Method of applying carrier films prepainted with metallic paint to automobile body panels
AssigneeGeneral Motors Corporation
InventorsWilliam T. Short, Charles C. Mentzer, Howard W. Cox
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Abstract
A method of applying a carrier film prepainted with metallic paint containing metal flakes to an automobile body panel in a vacuum forming process.
Claims2
A method of making a plurality of automobile body panels each comprising an external sheet layer and an underlying substrate layer, said external sheet layer having a top surface and a bottom surface wherein said top surface is painted to a predetermined color with a urethane paint, said bottom surface is bonded to said underlying substrate layer of suitable material such that the color appearance of said panels conforms substantially to a color standard when mounted on a vehicle, comprising the steps of:
- (a) applying said paint containing metal flakes to the top surface of said sheet layer and baking for a sufficient length of time to adequately cure said paint,
- (b) coating the bottom surface of said sheet with a layer of adhesive,
- (c) heating said sheet to a temperature at which said sheet becomes sufficiently pliable for vacuum forming,
- (d) positioning said heated sheet section over a substrate and drawing vacuum through vacuum ports located underneath said substrate such that said sheet draws, said drawing process aligns substantially all the metal flakes contained in said paint layer such that the color appearance of said plurality of panels conforms substantially to a color standard, and
- (e) vacuum forming said drawn sheet over and causing said sheet to adhere to said substrate.
A method of making a plurality of automobile body panels each comprising an external sheet layer and an underlying substrate layer, said external sheet layer having a top surface and a bottom surface wherein said top surface is painted to a predetermined color with a urethane paint, said bottom surface is bonded to said underlying substrate layer of suitable material such that the color appearance of said panels conforms substantially to a color standard when mounted on a vehicle, comprising the steps of:
- (a) applying said paint containing metal flakes to the top surface of said sheet layer and baking for a sufficient length of time to adequately cure said paint,
- (b) coating the bottom surface of said sheet with a layer of adhesive,
- (c) heating said sheet layer to a temperature at which said sheet becomes sufficiently pliable for vacuum forming,
- (d) positioning said heated sheet section over a substrate and drawing vacuum through vacuum ports located underneath said substrate such that said sheet draws, said drawing process aligns substantially all the metal flakes contained in said paint layer to a repose angle of less than 10.degree. such that said plurality of panels have the same color appearance, and
- (e) vacuum forming said drawn sheet over and causing said sheet to adhere to said substrate.
Dependencies are inferred from the claim text.