. The Bell System technical journal . k^^P I IK- 14 — Anchoring section of automatic die. 880 THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1954. Fig. 15 — Molding section of automatic die. projecting into both halves of the die cavity. These fins, used to guidethe mating twin contact wires in the finished relay, must be held to closelimits dimensionally and are thin to the point of fragility. To insuresatisfactory removal of the resin blocks from the upper half of the diewhile simultaneously retaining them in place in the lower half whenthe die is opened, spring loaded ejector pins in the upper die
. The Bell System technical journal . k^^P I IK- 14 — Anchoring section of automatic die. 880 THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1954. Fig. 15 — Molding section of automatic die. projecting into both halves of the die cavity. These fins, used to guidethe mating twin contact wires in the finished relay, must be held to closelimits dimensionally and are thin to the point of fragility. To insuresatisfactory removal of the resin blocks from the upper half of the diewhile simultaneously retaining them in place in the lower half whenthe die is opened, spring loaded ejector pins in the upper die half pushdown against the cured blocks. The ejector pins operate until the wdre-resin cluster has been ejected from the upper die. Subsequently they areretracted by contact with reset pins which butt against the lower diehalf when the die is closed. The openings in the die half which accom-modate these ejector pins serve as air vents when the resin is enteringthe cavity. To prevent the plastic cull, , the resin slug and associatedrunners, from breaking off and damaging the die on the next moldingcycle, the pressure of the tran
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
