Explanation

It refers to the process of melting the surface of two plastics parts at the same time by means of heat, so that they can be connected together. According to the different heating bating methods used, plastics welding methods can be divided into bating by external heat source, bating by mechanical movement and bating by electromagnetic light and sound wave. ① Hot plate weld. Generally, the plane hot plate will melt and bating the two planes to be weld, and then quickly remove the hot plate to merge the two planes and apply pressure until cooling; ② Pulse thermal weld is mainly used for weld of connecting plastics films with small thickness, pressing the two films together and completing weld by using the instantaneous heat generated by nickel chromium wire; ③ Infrared weld, which is similar to the weld of electric hot plate. Fix the two parts to be weld close to the electric hot plate but not in contact with it; ④ Laser weld: bating and melt the plastics in the laser focus area. During the subsequent solidification process, the melted materials forms a joint, and the parts to be weld are connected. It is usually used for materials with good light transmittance such as PMMA'PC, PVC, PA66, PS, etc.; ⑤ Ultrasonic weld refers to the use of high-frequency vibration waves to transmit to the surfaces of two objects to be weld. Under pressure, the surfaces of two objects rub and heat each other to form a fusion between molecular layers; ⑥ High frequency weld: under the high frequency electric field of the electrode, plastics molecules vibrate, generate heat by friction, melt, and weld together under pressure. It is widely used for plastics film weld.

Classification