FREMGANGSMAADE TIL SVEJSNING AF EN PRAEGE- OG/ELLER SVEJSE- OG/ELLER SKILLESOEM I ET ELLER FLERE LAG MATERIALE INDEHOLDENDE VARMESVEJSBART, ISAER TERMOPLASTISK PLASTMATERIALE, OG SVEJSEPRESSE TIL UDOEVELSE AF FREMGANGSMAADEN

摘要

PCT No. PCT/DK92/00056 Sec. 371 Date Aug. 25, 1993 Sec. 102(e) Date Aug. 25, 1993 PCT Filed Feb. 25, 1992 PCT Pub. No. WO92/14602 PCT Pub. Date Sep. 3, 1992.By the welding of plastic material, the plastic material is placed between a welding electrode of a profile and pattern mating the welding to be performed, and a counter electrode comprising one or several pulse heating wires. Together the pulse heating wires cover the pattern of the welding electrode and project preferably a short distance beyond the welding electrode. The pulse heating wires are furthermore mutually and outwardly electrically insulated. A separating tape of a higher melting point than the plastic material has been inserted between the pulse heating wires and the plastic material. The welding press comprises a welding plane with the welding electrode and a fixing plane for the counter electrode. The temperature of the welding electrode can be kept constant and within a temperature range of approximately 20 DEG C. to approximately 250 DEG C. The fixing plane is non-heated. The pulse heating wires are secured to the fixing plane and are mutually and outwardly electrically insulated. Each pulse heating wire communicates with a current source and an electronic regulator capable of setting and regulating the temperature and heating period of each pulse heating wire very accurately.