Title: Apparatus for molding fluid seal elements

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Abstract: An apparatus for molding articles, particularly those having a body portion formed from a cured material and bonded to a relatively rigid insert portion. Two mold members are arranged for relative movement along a given axis between open and closed positions. Each of the members includes surfaces at least partly directed towards each other to define in said closed position of the members, a molding cavity between the members. One of the mold members has a part for engaging a relatively rigid insert, so as to form a flash barrier on the insert when it is engaged by the mold part. The mold has surfaces for supporting the insert on at least one of its surfaces. The mold assembly includes a third mold member which is movable relative to both of the other two mold members. The moldable material from which the article is to be formed is received on one mold member, and the other member is reciprocable along a given axis and adapted to apply a predetermined closing force to the first and third members. Springs or other resilient means are disposed between a mold plate and the first mold member, and a second spring is disposed between the third mold member and the mold plate, and the first and third mold members have sealing surfaces engaging each other and separated only by a working clearance. In use, the members respectively first engage the stamping, then the rubber, and finally, under the spring force, move the rubber into the mold and hold it there under a predetermined force.


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