Ultrasonic plastic welding machine
Ultrasonic Plastic WelderIt is a welding equipment developed and designed by ultrasonic plastic welding equipment in the field of plastic welding. It is referred to as ultrasonic plastic welding machine in industry. Ultrasonic welding equipment is a high and new technology for fusion welding of plastic products. All kinds of plastic products can be ultrasonically welded. When welding plastic products, neither adhesives, fillers or solvents are added nor a large amount of heat source is consumed. It has the advantages of simple operation, fast welding speed, high welding strength and high production efficiency. Therefore, the application of ultrasonic welding technology is becoming more and more extensive.
When ultrasonic waves act on the thermoplastic contact surface, tens of thousands of high-frequency vibrations are generated every second. This high-frequency vibration reaches a certain amplitude. Ultrasonic energy is transmitted to the welding area through the upper weldment. Due to the large acoustic resistance of the welding area (that is, the interface between the two welds), local high temperatures will occur. Due to the poor thermal conductivity of plastics, they cannot be distributed in time for a while, and gather in the welding area, causing the contact surfaces of the two plastics to melt rapidly, and a certain pressure is added to make them join together. When the ultrasound stops, let the pressure continue for a few seconds to make it solidify and form, thereby forming a solid molecular chain to achieve the purpose of welding. The welding strength can be close to the strength of the raw material. The quality of ultrasonic plastic welding depends on the amplitude of the probe, the applied pressure and the welding time. The welding time and pressure of the welding head are adjustable, and the amplitude is determined by the sensor and the horn. The interaction of these three quantities has an appropriate value. When the energy exceeds the appropriate value, the plastic melts in a large amount and the weldment is easily deformed; the energy is small, the welding is not easy to be firm, and the pressure applied will not be too large. The ideal pressure is the product of the length of the edge of the weldment and the ideal pressure per 1 mm of the edge.