During hot plate welding, the parts to be joined clamped on the moving carriages of the machine are brought into contact with the hot plate. The compensating process then starts under the heating pressure. This serves to compensate tolerances and to achieve a uniform contact with the hot plate. When the present compensation distance has been reached, the heating phase starts during which the melt cushion is formed under practically zero pressure. The carriages are then moved back until the hot plate can be pulled back completely free from the parts to be joined. The actual welding process then starts, during which the melted parts to be joined are brought together under the joining pressure.

Materials:

PMMA, PP, PVC, PBT, PE, PS, ABS, POM, PA6, PA12;
Well proven: PMMA with ABS, PMMA with PVC, PMMA with PS;
Limited suitability: PVC with ABS, HDPE with PP