When the ultrasonic wave acts on the thermoplastic plastic contact surface, it will generate high-frequency vibration of tens of thousands of times per second. This high-frequency vibration reaches a certain amplitude, and the ultrasonic energy is transmitted to the welding area through the upper weldment. Because the welding area is the two The acoustic resistance of the welded interface is large, so local high temperature will be generated.
Principle of ultrasonic welding: the high frequency vibration wave is transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces of two objects are rubbed against each other to form fusion between molecular layers.
1. Welding tool head 2. Upper welding part 3. Lower welding part 4. The welding area
Advantage of the ultrasonic welding system:
Process cost: mold cost (low), single piece cost (low), maintenance cost (low)
Typical products: consumer electronics, medical products, packaging, home appliances, automobiles, etc
Suitable for production: small batch or large batch
Quality: high tightness of welded joints, stable welding process
Speed: fast, efficient and short time
What materials are suitable for ultrasound?
1. Ultrasonic welding is suitable for all thermoplastic, amorphous plastic such as ABS,PMMA,PC,PS; Semi-crystalline plastics such as PA,PET,CA,POM,PE and PP
2. Ultrasonic welding is also suitable for non-textile fabrics, such as thermoplastic fabrics, polymer materials, coated paper and mixed fabrics
Design considerations of ultrasonic welding;
1. Ultrasonic welding is extremely extensive, such as spot welding, embedding, riveting, welding and so on. It gives designers great freedom in product development, for example, MP3 or mobile phone products composed of various materials, except ultrasonic welding, other welding techniques can not be satisfied;
General application of ultrasonic welding products
Automobile industry: Ultrasonic welding can be controlled by computer program to implement the welding of large and irregular parts such as: bumper, front and back doors, lamps, brake lights, etc. With the development of high-grade roads, more and more reflective pieces are welded by ultrasonic wave.
Home appliances industry: through appropriate adjustment can be used for: portable solar lamp shade, steam ironing door, TV shell, recording, sound machine transparent panel, power rectifier, TV shell screw fixing seat, mosquito lamp shell, washing machine off the sink and other household appliances that need to be sealed, firm and beautiful.
Packing industry: hose sealing, connection of special packing belt.
Toys industry: because of the use of ultrasonic technology to make products clean, efficient, firm, without the use of screws, adhesives, glue or other accessories, reduce production costs, so that enterprises in the market competitiveness greatly enhanced.
Electronic industry: the use of automatic design to achieve large-scale production, while ensuring product quality requirements. Six, other commercial uses: from communication equipment, computer industry, printing equipment to audio and video products, all can use minghe ultrasonic equipment, he brings you simple, clean, efficient production mode, bring you more opportunities.
Post time: Jun-10-2022