What are the functions of ultrasonic welding machines?

Nov 13, 2023

Ultrasonic welding machines are divided into ultrasonic plastic welding machines and ultrasonic metal welding machines, which connect plastic parts to plastic parts and metal parts to metal parts. There are six major welding functions:
1. Ultrasonic riveting: Press the ultra high frequency ultrasonic welding head (horn) onto the protruding tip of the plastic product, causing it to instantly heat and melt into the shape of a rivet, causing the metal object to be riveted and fixed.
2. Ultrasonic embedding: Using ultra-high frequency ultrasonic waves to vibrate, metal parts (such as nuts and screws) are instantly squeezed into the reserved plastic holes through the conduction of the welding head (horn) and appropriate pressure, and fixed at the set depth. After completion, both the tension and torque can be comparable to the strength of traditional molding in the mold, and can avoid the drawbacks of damaged and slow injection.
3. Ultrasonic spot welding: When two pieces of plastic need to be fused, due to the limited conditions of the fusion material, a fusion line cannot be set up. Spot welding can be used for fusion welding. The principle is to use ultrasonic waves to transmit to the front end of the welding head, passing from the upper plate to the lower plate, and achieve the effect of fusion welding. Additionally, spot welding can be carried out simultaneously to improve work efficiency.
4. Ultrasonic cutting: Using ultrasonic high-speed vibration of the welding head to cut the sharp edges of the formed plastic parts and cut the injection port, the plastic components can instantly detach from the injection channel, not only eliminating the need for manual cutting, but also making the plastic parts smooth and beautiful. Materials suitable for ultrasonic cutting include ABS, PS, acrylic, PC, plastic steel, etc. Plastic that is too soft or elastic is not suitable for ultrasonic cutting. The effect of the plastic material is poor before it cools down when it is first shot out.
5. Ultrasonic forming: Similar to ultrasonic riveting. It is the process of pressing a concave welding head onto the outer ring of a plastic product, causing it to vibrate at high frequencies, and then melting the plastic into shape to wrap it around a metal object to fix it. It has a smooth and beautiful appearance, and is commonly used for fixing and forming electronic and horn products, as well as fixing cosmetic lenses.

 

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