Removable plate mold

Removable plate mold

The removable plate mold construction is used most frequently for the production of parts have molded threads. This construction, makes use of a plate which is taken out of the mold where it may be worked on for release of the molded pieces by unscrewing them or by using special ejector fixtures. To facilitate production, two plates are used in most cases, as the parts may be removed from one plate during the curing period of the other. These extra plates are used extensively when several inserts of deep parts from the plunger. must be threaded into the plat-. The use of the extra plate will, in most instances, give a fifty per cent increase in production.

Molds which use this construction must not be top large as excessive weight make the plate unwieldy and overheavy to, handle. Twenty pounds is a desirable maximum weight for the removable plate mold, although fifteen pounds is considered better. When heavier plates are required, they should be designed to slide from the mold onto a track so the operator will not have to lift them. Hinge designs may be added, enabling the operator to slide the plate out of the mold and swing it to the vertical position where the molded pieces will be readily accessible.

The extra plate is kept on a hot plate while out of the mold so that it will, as nearly as possible, retain mold temperature. This is done so as not to lengthen the molding cycle when the plate is put back in the press.

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The removable plate mold construction is used most frequently for the production of parts have molded threads.