APPARATUS FOR CONTINUOUSLY PRODUCING HEAT-SHRINKABLE CROSSLINKED RESIN TUBE

• Main Authors: YOSHIDA, SHOTARO, TAKAOKA, MICHIO, MOTAI, TSUNEAKI, ONO, MOTOYUKI, HASEGAWA, MASAKAZU, ONISHI, AKIHUMI
• Format: Patent
• Language: English
• Published: 08.09.1993
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

An apparatus for continuously producing a heat-shrinkable crosslinked resin tube from a crosslinkabale resin is provided, comprising in succesive connection, an extruder head for extruding the resin into a hollow tube, a fluid under pressure being introduced into the interior of the tube being extruded, a crosslinking cylinder disposed downstream of the head for heating the tubular resin for crosslinking, an flare die disposed downstream thereof for allowing the tube to expand under the fluid pressure, a cooling cylinder disposed downstream thereof for cooling the tube, a guide for deforming the tube into a flattened form, and rollers for pressing and drawing the tube away from the extruder head, wherein a smooth interior surface free of a substantial gap or step extends continuously from the crosslinking cylinder to the cooling cylinder.