Patent ID: 7364131
Filing Date: 2008-04-29
Classification: B22D,B29C,F16K,Y10T

Abstract:
1. A non-return valve for use in a flow channel of a metal molding system, the non-return valve comprising: a tip member; a ring member configured to be slidably arranged around a portion of the tip member for a travel between an open and a closed position the tip member and the ring member being configured to cooperate with a flange member for limiting the travel of the ring member; a melt passageway being configurable along the non-return valve when the ring member is arranged in an open position, the melt passageway including: a pair of complementary retaining-sealing portions being configured on parallel faces provided on the rear of the ring member and the front of the flange member, whereby a face-seal is configurable therebetween when the non-return valve is in the closed position to assist in blocking the backflow of melt flow through the melt passageway, wherein: the tip member includes a spigot flange, the complementary pair of spigot portions are configured along a portion of an outer circumferential surface of the spigot flange, and along a portion of an inner circumferential surface of the ring member, and the melt passageway further includes: