The hot plate welding machine is specifically designed for welding plastic materials. Compared to laser welding machines, there are several differences. In hot plate welding, the hot plate directly contacts the plastic parts. The temperature generated on the hot plate is transferred to the plastic parts, causing it to melt and fuse together. On the other hand, laser welding equipment works by applying laser to the plastic parts without direct contact. Now, let’s explore the components and functions of hot plate welding machines, as shared by Jfortune, a hot plate welding manufacturer.
The hot plate welding machine consists of the following components: pneumatic transmission part, control part, electrical part, machine table, hot plate mold, and mechanical devices.
- Pneumatic transmission part: This part includes an air filter, pressure regulator, oil mist lubricator, directional valve, throttle valve, cylinders, etc.
During operation, the hot plate welding machine utilizes an air compressor to drive the stroke cylinder, which in turn moves the hot plate mold system up and down. The pneumatic transmission is adjusted according to the requirements of the plastic components being welded in the hot plate welding process.
Control Part: The control part consists of a PLC and a temperature controller. Its main functions are as follows: 
a) Controlling the operation of the pneumatic transmission system: It opens the air valves in the pneumatic circuit under timed control. The cylinder applies pressure to make the welding head descend with a certain pressure to clamp the plastic parts. After welding, it maintains pressure for a certain period of time. Then, the control system switches the air valves to make the welding head rise and return to its initial position.
b) Controlling the heating time of the plastic components on the hot plate: This system achieves automation of the entire welding process. By pressing a start button to generate a trigger pulse, the operation proceeds automatically throughout the entire welding process. The control system sequence is as follows: Power-on triggers the control signal of the pneumatic transmission system. The cylinder applies pressure to tighten the upper and lower molds, causing them to descend and engage in the hot plate welding process. A certain melting time is maintained, followed by a certain pressure retention time. The pressure is then released, and the upper and lower molds rise to complete the welding process.