DEVICE FOR WELDING THERMOPLASTIC MEMBRANES

• Main Authors: LE MONNIER MARC, DENET STEPHANE, LECOCQ VINCENT
• Format: Patent
• Language: English
• Published: 31.01.2013
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; 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; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a device (21) for welding a first thermoplastic membrane (12) to a second thermoplastic membrane (13), in which at least the first thermoplastic membrane (12) or the second thermoplastic membrane (13) is absorbent. The invention is characterised in that the welding device (21) comprises at least one die (1) including a plurality of laser diodes (2) for emitting a laser beam (F) forming direct, simultaneous and uniform illumination on the illumination surface (23) of the first thermoplastic membrane (12).