Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – And means to apply stress to preform and uniting in stressed...
Patent
1998-10-28
2000-09-12
Davis, Robert
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
And means to apply stress to preform and uniting in stressed...
425127, 249 89, 249180, B29C 3312, B29C 3376, B29C 4533
Patent
active
06116884&
ABSTRACT:
A mold core is provided for producing an overmolded flexible valve. The mold core comprises a mold body, a piston assembly, a piston retaining means, a collet bit positioning means and at least two collet bits. The mold core has a cylindrical void in a distal end and has a pressure means communicated with the cylindrical void. The piston assembly has a piston head sized and adapted for axial movement in the cylindrical void, with a piston shaft extending axially from the head. The shaft is tapered from a larger first diameter at one end to a smaller second diameter at the other end. The piston retaining means has a bore through it to allow insertion of the piston shaft. Each of the at least two collet bits has an inner cylindrical tapered surface segment, the taper of the surface segment being essentially the same as the taper in the piston shaft, and an outer cylindrical surface segment, sized and adapted to be inserted inside the flexible valve. The at least two collet bits are positioned adjacent to the tapered portion of the shaft. The collet bits are positioned by the collet bit positioning means.
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Rowley William W.
Seman Richard T.
Davis Robert
Nguyen Thukhanh T.
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