Compression Molding
The molds used for compression molding consist of a cavity and a force or plunger, as shown in Fig. Guide pins maintain the proper relation between these members. The mold cavity forms one surface of the molded paret and the molding compound is generally loaded in theis member. The mold plunger forms the other surface of the piece being molded, and serves to compress the compound when the mold is closed. The molding compound is thus confined to the open space between plunger and cavity while it hardens. Numerous features are incorporated in the molds to facilitate production. Provision for heating is often included in the mold design. Some presses are equipped with heating platens which transfer the heat to the molds. In some mold designs, the cavity and plunger, or the top and bottom retainer shoes are drilled out to permit steam or hot water to circulate for heating. Knockout or ejector pins are often used to push the piece a way from the cavity or plunger.
The only essential difference between the mold of Fig and a design in 1986 would be the use of socket head cap screws instead of the fillister head screws.
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