Back injection or back pressing of plastic products with a decorative facing layer involves compression of decorative material layers around intended product openings and edges during tool closure

摘要

A decorative material is placed in a tool with pinch-off edges for removal of: a) excess decorative material in areas which are not backed up by plastic or b) excess material around the outer edges of the finished product. The tool is then completely closed. Thermoplastic plastic is then injected or pressed onto the rear side of the decorative material and the finished product with outer edges and openings trimmed of excess decorative material. A decorative material is placed in a tool with pinch-off edges for removal of: a) excess decorative material in areas which are not backed up by plastic or b) excess material around the outer edges of the finished product. The tool is then completely closed so that decorative material is compressed under the pinch-off edges. Thermoplastic plastic is then injected or pressed onto the rear side of the decorative material and the finished product with outer edges and openings trimmed of excess decorative material. Decorative material is cut to the shape of the plastic product before placing in the tool. Compression of the decorative material is over a breadth of 0.1-3mm and the compressed areas are easily removed during a later assembly operation. An Independent claim is included for a back injected or back pressed plastic product with a decorative facing layer incorporating openings and trimmed edges produced by the claimed process.