초록 ▼

A process is disclosed for overmolding crosslinked tubing ends onto a crosslinkable tube. The tube, made of a first polymer, has an inner diameter. The tube is inserted at least partially into a mold and at least partially onto a cylindrical mandrel having a base and a tip. The mandrel has an outer

A process is disclosed for overmolding crosslinked tubing ends onto a crosslinkable tube. The tube, made of a first polymer, has an inner diameter. The tube is inserted at least partially into a mold and at least partially onto a cylindrical mandrel having a base and a tip. The mandrel has an outer diameter dimensioned to allow the inner diameter of the tube to slide thereon. The mold contains a void for injection of a second polymer. The void co-acts with the mandrel and the tube to define an overmolding shape. After injection molding the second polymer over the tube and the mandrel in the void of the mold, the first and second polymers are crosslinked. Different embodiments of the overmolding shape are taught.

대표청구항 ▼

[ What is claimed is:] [1.]1. A process for overmolding tubes comprising the steps of:inserting a tube of a first polymer, having an inner diameter, at least partially into a mold and at least partially onto a cylindrical mandrel, the mandrel having a base and a tip, an outer diameter of said mandre

[ What is claimed is:] [1.]1. A process for overmolding tubes comprising the steps of:inserting a tube of a first polymer, having an inner diameter, at least partially into a mold and at least partially onto a cylindrical mandrel, the mandrel having a base and a tip, an outer diameter of said mandrel dimensioned so as to allow the inner diameter of the tube to slide thereon, said mold containing a void for receiving a second polymer, the void co-acting with the mandrel and the tube to define an overmolding shape;injection molding the second polymer over the tube and the mandrel in the void of the mold; andcrosslinking the first and second polymers independently to an initial degree, andindependently crosslinking said polymers to a higher final degree.