MOLD ASSEMBLY FOR MAKING A COMPOSITE RESIN SEAL

摘要

A mold assembly for manufacturing fluid seal for a liquid and gas-filled damper mechanism. The seal includes a casing unit and a primary sealing ring subdivided into two portions, one portion being adapted to provide a fluid seal with an associated reciprocable rod, and the other to provide a one-way relief valve action to bleed fluid from one side of the lip body to the other when higher pressure is on the rod side; and to increase the sealing force when the higher pressure is on the other side of the lip body opposite the rod. The mold assembly has a fixed part for engaging one surface of the sealing ring and part of a cavity for an annular collar; an intermediate mold member for overlying a casing unit received in the mold; and a third mold member having a frusto-conical surface to engage a margin of the sealing ring on a face opposite the face engaged by the innermost margin of the fixed mold part.