The hot plate machine welds plastic components through a temperature-controlled heating plate. The hot plate device is used between two plastic parts during welding. When the workpiece is close to the hot plate, the plastic begins to melt, and a preheating time elapses. After that, when the material is heated by the heating element, the molecules reach a molten state, and the two plastic parts are pressed together under a certain pressure in a short period of time, and they become one with each other through molecular motion. After a certain period of cooling, the two plastic parts will fuse into one. , and achieve a certain welding strength, so that the welding function is realized. According to the driving source, it can be divided into three types: pneumatic, servo and hydraulic. Among them, pneumatic is the common pneumatic source. According to the structure of the equipment, it can be divided into vertical hot plate machine and horizontal hot plate machine.