Method of making a molded article having a film layer

Details Method of making a molded article having a film layer Method of making a molded article having a film layer

B - Operations, Transporting

29

C

B29C 69/00 (2006.01) B29C 51/10 (2006.01) B29C 70/78 (2006.01)

Patent

CA 2182727

The disclosure describes a method of making a molded article having a film layer on its exterior surface that provides a surface finish to the article; the method consists in first placing a thermoplastic film in a two-partmold having a negative recessed border undercut in one of its part and in vacuum forming, under heat conditions, the film to make a preform having inward folded edge having a shape corresponding to that of the recessed border undercut. After removing the preform from the mold, part of the preform edge is trimmed to leave an inward peripheral edge along the preform which is then placed in a second mold wherein molten plastic is blown or injected; the plastic of the peripheral edge melts with the plastic to provide an intimate bonding at the peripheral edge of the article.

Cette invention concerne une méthode de fabrication d'un article moulé comportant une pellicule de finition sur sa surface extérieure. La méthode comprend d'abord la mise en place d'une pellicule thermoplastique dans un moule à deux plateaux comportant une contre-dépouille dans l'un des plateaux, la pellicule ayant, en moulage sous vide et par apport de chaleur, un bord replié vers l'intérieur pour former une préforme épousant la forme de la contre-dépouille. Une fois la préforme enlevée du moule, une partie du bord replié est rognée pour laisser une rive périphérique orientée vers l'intérieur le long de la préforme qui est alors placée dans un second moule dans lequel on injecte ou souffle du plastique fondu, le plastique formant la rive périphérique fondant au contact du plastique injecté pour une assemblage solide à la périphérie de l'article.

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