Method and apparatus for die change in extrusion moulding

• Main Authors: MATSUDA, KOJI, MAKINO, SEIJI
• Format: Patent
• Language: English; French; German
• Published: 28.09.2011
• 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 extrusion molding method of a resin-molded article is provided. A resin extrusion molding apparatus includes an extruder (1), a die (2), a sizing device (3), a take-up device (4) and a cutting machine (5). During the resin-molded article is extrusion-molded, a replacement die (2a) is made to stand by at a standby position laterally adjacent to the die (2) and a replacement sizing unit (36) is made to stand by at a standby position laterally adjacent to a sizing unit (35) which coincides with an extrusion line of the sizing device (3). After the resin extrusion molding apparatus is stopped, the die (2) is detached from the extruder (1) and the replacement die (2a) is moved to and attached to the extruder (1), and the sizing unit (35) is moved to a position laterally deviated from the extrusion line and the replacement sizing unit (36) is moved to a position which coincides with the extrusion line. Upper and lower endless rotary bodies (41) of the take-up device (4) are laterally moved to make one of a plurality of supporting faces of pads (40) coincide with the extrusion line. After the replacement of the die (2), the replacement of the sizing device (3) and the replacement of the take-up device (4) are completed, the resin extrusion molding apparatus is restarted.