Co-extrusion head for coating wire

摘要

An extrusion head includes a first housing member and second housing member each with a passageway extending therethrough, the two housing members being attached to each other such that the respective passageways are aligned. The first housing member includes structure positioned within the passageway for applying a coating material (such as PVC) to a wire as it is drawn therethrough. The second housing member includes an inlet channel adapted to be attached to a source of nylon, the inlet channel extending to a recessed groove in the end of the second housing member, which end is adjacent to the first housing member, such groove surrounding a surface configured to form a spacing between the two housing members through which spacing the nylon passes in a direction toward the wire as it is drawn therethrough. The groove is offset relative to the position of the wire as it is drawn therethrough for uniformity of flow of the nylon, and the nylon is applied over the coating material substantially simultaneously as the coating material is applied to the wire.