| 摘要 |
A method for heat welding plastics (1, 2) between a holder-on (5) and an electrode (3) comprising a pulse heating element (9). A welding press (10) for carrying out the method comprises two planes (4, 5) relatively movable (6) towards and away from one another, and an adjustable depth stop. The welding plane (4) is non-heated and retains at least one pulse heating element (9) with an active area (R) separated from the plastic material (1, 2) by way of a partition layer (8) of a higher melting point. The profile and the pattern of the welding electrode are shaped in accordance with the welding to be performed. Each pulse heating element (9) is connected to a timer and an electronic regulator which can individually set and adjust very accurately the temperature and the welding period for each pulse heating element. The holder-on plane (5) is also non-heated and of a shape mating the shape of the welding pattern and the material (1, 2). A welding electrode to be used when carrying out the method comprises a laminate of two electrically insulating layers (7, 8) of a higher melting point than the plastic material (1, 2), and a pulse heating element (9) embedded between said two layers and communicating with outside current connectors (A, B). |
