Extrusion tool and method of extrusion coating

Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...

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Details

264174, 425113, 425192R, 425461, 425467, B29C 4728

Patent

active

052156982

ABSTRACT:
An extrusion tool is provided for extruding a coating jacket onto a least one pre-coated conductor or conductor bundle. The extrusion tool comprises a frame, a first conical element, a second conical element, and a die. The frame is formed to include a port positioned to receive a coating material. The first conical element is mountable on the frame and is formed to include a bore, the bore being sized to allow passage of the pre-coated conductor or bundle therethrough. The second conical element is mateable with the first conical element and cooperates with the first conical element to define a first flow passageway therebetween. The first flow passageway is positioned to receive the pre-coated conductor or bundle as it exits from the bore and is connected in fluid communication with the port to supply an initial portion of the coating jacket. The second conical element also includes a tapered portion and terminates in a cylindrical tip. The die cooperates with the tapered portion and the cylindrical tip of the second conical element to define a second flow passageway therebetween to supply a final portion of the coating jacket. The cylindrical tip terminates upstream of the die face.

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