In-mold metallized polymer components and method of...

B - Operations – Transporting – 32 – B

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B32B 15/08 (2006.01) B29C 45/00 (2006.01) B29C 45/16 (2006.01) B32B 15/082 (2006.01) C08G 73/10 (2006.01)

Patent

CA 2602868

A method is provided for forming a net shape molded component that includes an integral metallized coating (12) or layer on the exterior surface thereof . The method includes injecting a carefully matched mixture of a molten polymer (10) resin and a molten metallic alloy (12) into a mold cavity (20) under pressure. Due to the differential in material viscosities, the metal (12) tends to migrate to the outer surface (22) of the molded part when placed under pressure, ultimately creating a net shape molded part (34) having a polymer core (10) with a metallic layer (12) at the exterior surfaces thereof . Further, the present invention provides for the compounding of a feedstock (40) suitable for use in conjunction with the method described above.

L'invention concerne un procédé qui permet de former un composé moulé à finition immédiate comprenant une couche ou un enrobage métallisé intégré (12) sur sa surface extérieure. Le procédé de l'invention consiste à injecter un mélange soigneusement défini d'une résine de polymère fondu (10) et d'un alliage métallique fondu (12) dans une cavité de moule (20) sous pression. En raison de la différence de viscosité des matériaux, le métal (12) tend à migrer à la surface extérieure (22) de la partie moulée lorsqu'elle est mise sous pression, créant à la fin une partie moulée à finition immédiate (34) comprenant un coeur de polymère (10) entouré d'une couche métallique sur ses surfaces extérieures. L'invention se rapporte en outre à la préparation d'un produit de départ (40) apte à être utilisé selon le procédé précité.

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