Method of making an overmolded flexible valve

Details Method of making an overmolded flexible valve Method of making an overmolded flexible valve

1997-10-16

1999-10-12

Ortiz, Angela

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264275, 264278, B29C 3312, B29C 4514, B29C 4533, B29C 3376

Patent

active

059650770

ABSTRACT:
The invention encompasses an overmolding process which includes the steps of inserting a flexible one-way valve into a plastic conduit, inserting the conduit with the valve at least partially onto a mold core, radially expanding at least a portion of the mold core from a first radial position to a second extended radial position, molding a polymer over at least a portion of the mold core and the plastic conduit, and radially contracting at least a portion of the mold core from the second extended radial position to essentially the first radial position. The radial expansion and contraction is in response to axial movement of a tapered shaft from a first axial position to a second expanded axial position, the shaft having a first diameter and a second diameter at a terminal end of the shaft, the second diameter being smaller than the first diameter. The axial shaft movement is in response to a controllable supply of a compressible gas which overcomes the biasing force of a spring to move the piston shaft.

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