1. Pressure control The control of the pressure value is very important. Only when the appropriate pressure is selected can the plastic parts be perfectly transitioned from elasticity to plasticity, and the air in the middle can be squeezed out of the plastic parts during welding to obtain high-quality welding. Finished product. 

2. The control of time The control of melting time and cooling time has a great influence on welding quality. When the power is constant, if the welding time is too short, the phenomenon of virtual welding will occur, and if the time is too long, the weldment will be deformed and defective products will be obtained. After the welding is completed, it is necessary to ensure that there is sufficient cooling time to ensure that the completed weldment has sufficient strength. 

3. The melting amount is selected appropriately to ensure that the two plastic parts have enough molecules to fuse, and to ensure that there will be no virtual welding. Melting volume is another very important factor that affects welding quality after welding equipment and welding technology.

4. Hygroscopicity of weldment When welding wet plastic parts, the plastic parts will evaporate and form bubbles after heating because of excessive moisture content, which reduces the sealing performance and leads to poor welding results. To solve this problem, it is necessary to perform dehydration and drying before welding. 

5. Fillers When welding plastics, it is sometimes necessary to add some fillers to ensure welding quality. Commonly used fillers include glass fiber, mica and other substances. These fillers will change the characteristics of the material, but their content should be controlled. When there is too much filler, the proportion of plastic will be insufficient, and the fusion of the two plastic parts will not be enough, and the proper proportion of filler can ensure normal welding. 

6. Keep the welding surface clean