Method of making metal-plastic ski
AssigneeLaminoirs a Froid de Thionville
InventorDaniel Urbain
Life of this patent
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Abstract
A process of making a metal-plastic ski by cold gluing on a core of plastic material, upper and lower laminated structures. The laminated structures which form the upper and lower portions of the ski are each previously formed by "Coil-Coating" and have inner surfaces with a thin coating of a material with excellent glue adhesion characteristics. The upper surface of the upper structure is precoated with a thicker layer of plastic material which forms the upper surface of the ski, and the lower surface of the lower structure is precoated with plastic material which forms the sliding bottom surface of the ski.
Claims9
A process for fabricating a metal plastic ski including a plastic core between a top metallic structure and a bottom metallic structure, said process comprising the steps of
- forming a core for the ski by molding a thermoplastic material soluble in a solvent, said core having a shallow top recess and a shallow bottom recess for nesting respectively the top and bottom metallic structures of the ski;
- obtaining a first semi-finished metal laminate sheet having a high elastic limit and precoated with an organic coating on each surface thereof by a continuous coating process during which said sheet is cleaned, chemically treated, coated on one surface with a protective coating constituting the upper covering of the ski, coated on its other surface with an intermediary gluing layer of a substance soluble in at least said solvent and said coatings are cured;
- obtaining a second semi-finished metal laminate sheet having a high elastic limit and precoated with an organic coating on each surface thereof by a continuous coating process during which said second sheet is cleaned, chemically treated, coated on one surface with a material constituting the runner surface of the ski, coated on its other surface with an intermediary layer of a substance soluble in at least said solvent, and said coatings are cured;
- cutting said first and second semi-finished metal laminates to predetermined profiles, similar respectively to profiles of said top and bottom recesses, to form said top and bottom metallic structures of the ski;
- applying to said intermediary gluing layers of said top and bottom structures a cold glue comprising at least said solvent;
- and
- nesting said top and bottom structures in said top and bottom recesses of said core and pressing said structures against said core to form a ski.
Dependencies are inferred from the claim text.