METHOD AND APPARATUS FOR EXTRUDING DIFFERENT TYPE MULTILAYER TUBE

• Main Authors: KOJIMA TAKESHI, HORIUCHI SHOZO
• Format: Patent
• Language: English
• Published: 03.03.1998
• Edition: 6
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; 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

PROBLEM TO BE SOLVED: To form a multilayer tube (hose) by simultaneously superposing a rubber and a synthetic resin having different extrusion molding temperatures by 100%. SOLUTION: When a rubber is extruded as a tubular rubber G from a rubber outlet 27 of a rubber extrusion head 22a, a synthetic resin P of high temperature is pressed to be connected from an end outlet 28 of a resin extrusion head 21a inserted to its inner peripheral position to an inner periphery of the rubber G in a radiating tendency, to an inner layer resin tube P to form a multilayer tube T integral with the rubber G.