Check valve lip seal for an injection molding machine

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 17/20 (2006.01) F16J 15/32 (2006.01) F16K 15/08 (2006.01)

Patent

CA 2567463

A check valve for a molding machine. The check valve has a stem portion and a ring portion movable along said stem portion between a melt channel open position and a melt channel closed position. A groove is formed in a forward face of the ring portion. The groove, in operation, receives melt to force an outer circumferential portion of the ring in a radial direction to provide a seal between the ring portion and a wall in the machine.

L'invention concerne une clapet de non retour pour une machine de moulage. Ce clapet de non retour présente une partie de tige et une partie d'anneau pouvant se déplacer le long de la partie de tige, entre une position ouverte de canal de matière fondue et une position fermée de canal de matière fondue. Une rainure est formée dans une face avant de la partie d'anneau. Cette rainure, lors du fonctionnement de la machine, reçoit la matière fondue pour forcer une partie circonférentielle extérieure de l'anneau dans une direction radiale afin d'obtenir un joint d'étanchéité entre la partie d'anneau et une paroi de la machine.

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