Patent ID: 6481996
Filing Date: 2002-11-19
Classification: B29C,B29L,Y10S

Abstract:
An improvement in a plastic injection mold comprising a cavity block having at least one cavity therein for forming relatively thin flat cards in a first plane, and a runner block with at least one plastic flow channel therein to supply plastic to the edge of the cavity in the cavity block when the runner block and the cavity block are in the plastic injection position, the improvement including in combination:a runner block having a tapered surface thereon; a cavity block movable relative to the runner block, and having a tapered surface thereon for mating with and contacting the tapered surface of the runner block when the cavity block and the runner block are in a plastic injection position in the first plane; and the tapered surfaces on the runner block and the cavity block being designed such that upon movement of one or the other of the cavity block and the runner block to a different plane parallel to the first plane to separate the cavity block from the runner block, the tapered surfaces move away from one another without sliding contact to sever runners from the cards without flash.