Method of making an overmolded flexible valve

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

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Details

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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