Gas assist molding of one-piece catheters

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/10 (2006.01) A61M 25/00 (2006.01) B29C 45/16 (2006.01) B29C 45/17 (2006.01)

Patent

CA 2329970

An apparatus and a method are disclosed for manufacturing an integral one--piece catheter having a tube and a hub. The method comprises feeding molten material into a mold having a mold cavity. A fluid such as a gas is injected into an inlet of the mold. This causes the cavity to eject the molten central region of the polymer through an exit channel. In one embodiment, a gas is injected into the hub portion of the cavity. In another embodiment, a gas is injected into the catheter portion of the mold. The invention also involves forming a first portion of an intravascular device using a first material in a first mold. Thereafter the first portion of the intravascular device is inserted into a second mold to form a second portion using a second material. Gas is then introduced to form a hollow channel in the second portion. The invention also involves a first portion of the mold is injected with a first material, and a second portion of the cavity is injected with a second material at or around the same time that the first material is injected into the first portion of the cavity. Gas is then introduced to form a hollow channel in the second portion.

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