A check valve with a spiral coil seal

Details A check valve with a spiral coil seal A check valve with a spiral coil seal

B - Operations, Transporting

22

D

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

Patent

CA 2568626

A seal for a check valve for a metal molding machine. The seal is provided by the combination of a peripheral groove in an outer surface of the check valve and a helically wound core in the groove. The helically wound coil is expandable into sealing engagement with a cylindrical wall of the molding machine. The helically wound coil may be movable laterally in the groove between a melt channel open position and a melt channel closed position to open or seal the melt channel.

L'invention concerne un joint pour clapet de non-retour pour machine de moulage de métal. Le joint est constitué par la combinaison d'une rainure périphérique dans une surface extérieure du clapet de non-retour et une âme enroulée de façon hélicoïdale dans la rainure. La bobine enroulée de façon hélicoïdale est dilatable en contact hermétique avec une paroi cylindrique de la machine de moulage. La bobine enroulée de façon hélicoïdale peut être mobile latéralement dans la rainure entre une position ouverte du canal de fusion et une position fermée du canal de fusion pour ouvrir ou pour fermer hermétiquement le canal de fusion.

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