| 摘要 |
A reusable gasket for use in and in combination with a molding apparatus for casting articles of acrylic monomer plastic or the like. The gasket comprises a mold and casting release surface for contact with a cast plastic article and the two mold surfaces and includes a core of elastomeric material completely, but loosely encased in a tube impervious to passage therethrough by the material of the core and the material of the plastic article to be cast. The impervious tube may be of polytetrafluoroethylene, polyamide, polyethylene, or like material. The mold and casting release surface is preferably silver. A plurality of gasket members are placed in end-to-end relationship between a pair of plate members in a molding apparatus to define a casting cavity. A plug in the form of a wedge may be used to close a gap between adjacent ends of two gasket members through which casting material may be flowed into the cavity prior to closing the gap.
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