B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 65/22 (2006.01) B29C 65/02 (2006.01) B29C 65/38 (2006.01)
Patent
CA 2104366
By the welding of plastic material, said plastic material is placed be- tween a welding electrode (9) of a profile and pattern mating the welding to be performed, and a counter electrode (l0) comprising one or several pulse heating wires (22). Together the pulse heating wires cover the pattern of the welding electrode (9) and project preferably a short distance beyond said 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 (22) and the plastic material. The used welding press comprises a welding plane with the welding electrode (9) and a fixing plane (32) for the counter electrode (10). The temperature of the welding electrode (9) can be kept con- stant and within a temperature range of approximately 20 °C to approxi- mately 250 °C. The fixing plane (32) is non-heated. The pulse heating wires (22) are secured to the fixing plane and are mutually and outwardly electri- cally insulated. Each pulse heating wire (22) communicates with a current source and an electronic regulator capable of setting and regulating the tem- perature and heating period of each pulse heating wire (22) very accurately.
Evald Nyborg Holding Aps
Macrae & Co.
Weldan A/s (evald A. Nyborg A/s)
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