In the production process of plastic products, ultrasonic welding technology can seal plastic products quickly and efficiently. Besides, in the process of sealing, it is no need to have externally heating plastic products or no need any flux, the welding effect is very good and welding strength is also very high. During the ultrasonic welding technology in the application process, the features of low cost and high safety also makes it is widely used in plastic machinery products, stationery industry, makeup industry, toy industry, electronic industry.
1. Ultrasonic plastic welding technology and its characteristics
1. 1 Ultrasonic plastic welding technology
Ultrasonic plastic welding technology is to weld plastic products together through ultrasonic vibration principle. When the ultrasonic wave is used to weld the plastic welds, friction will occur between the molecules in the ultrasonic wave and the contact surface of the plastic products, and then the temperature of the welding on the plastic welding surface quickly reaches the melting point of the plastic. At this time, the melt of the two plastic welds will flow together. When the molecules in the ultrasonic wave stop vibrating, The plastic melt is subjected to pressure and quickly solidifies and crystallizes, making the weld even. The strength of the welding point is close to that of the raw material. In order to weld plastic mechanical welds together, it is necessary to ensure that the heat generated by ultrasonic wave can only occur in the welding area, and the corresponding energy guiding structure should be used to transfer and guide the heat generated by ultrasonic wave, and the energy guiding structure is also called the welding wire structure.
1.2 Characteristics of ultrasonic plastic welding technology
Ultrasonic plastic welding technology is only suitable for thermoplastics, and for other materials is not suitable for use. the reason to choose thermoplastics is that the chemical and physical properties of thermoplastics remain unchanged when they are melted and then cured. Thermoplastics can be divided into crystalline and amorphous according to their properties. Among them, the melting point of crystalline plastic is obvious, and its internal molecules will be arranged in accordance with the corresponding rules when curing to form crystal region.
Post time: Mar-14-2022