METHOD FOR PRODUCING THERMOPLASTIC ARTICLES HAVING THIN DOUBLE WALLS

• Main Author: THIEL A,DT
• Format: Patent
• Language: English
• Published: 23.10.1973
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HANDLING THIN OR FILAMENTARY MATERIAL; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STORING; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A method for producing cup-shaped, double-walled thermoplastic articles having two parts, namely a jacket and a liner nested in the jacket to define the inner and outer walls of the article, wherein batches of liners and batches of jackets are concomitantly formed in separate sheet sections of thermoplastic material at separate forming stations and at least one formed sheet section is transferred to a position where the jackets and liners of respective batches are internested, the internested parts are then blanked or cut out at a blanking or punching station to separate each pair of internested jacket and liner units, and the internested jackets and liners of each separated pair are secured together by beading or welding.