Method and apparatus for injection compression molding using...

B - Operations – Transporting – 29 – C

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B29C 43/00 (2006.01) B29C 43/32 (2006.01) B29C 45/00 (2006.01)

Patent

CA 2561445

Method and apparatus for compressing melt and/or compensating for melt shrinkage in an injection mold are provided. The apparatus includes a cavity mold portion (703) adjacent a cavity plate (701), a core mold portion (702) adjacent a core plate (704), a mold cavity formed between the mold portions, and at least one piezoceramic actuator (708) disposed between either or both of the core plate (704) and the core mold portion (702) and the cavity plate (701) and the cavity mold portion (703). A controller is connected to the at least one piezoceramic actuator (708) and activates it, thereby causing the mold cavity volume to decrease, compressing the melt.

L'invention concerne un procédé et un appareil destinés à comprimer un produit fondu et/ou à compenser un rétrécissement du produit fondu dans un moule d'injection. L'appareil comprend une partie de moule à cavité adjacent à une plaque à cavité, une partie de moule noyau adjacent à la plaque de noyau, une cavité de moule formée entre les parties de moule et au moins un actionneur piézo-céramique placé soit entre la plaque de noyau et la partie de moule de noyau soit entre la plaque à cavité et la partie de moule à cavité ou les deux. Un dispositif de commande est relié à au moins un actionneur piézo-céramique et l'active, entraînant ainsi la réduction du volume de la cavité du moule, par compression du produit fondu.

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