Ultrasonic plastic welding principle
Ultrasonic effect on the thermoplastic plastic contact surface, will produce tens of thousands of times per second high-frequency vibration, which reaches a certain amplitude of high-frequency vibration, through the welding pieces of ultrasonic energy to the welding area, Welding interface at the interface of large resistance, it will produce local high temperature. And because of poor thermal conductivity of plastic, the moment can not be distributed in time, gathered in the welding area, resulting in two plastic contact surface rapid melting, coupled with a certain pressure, to integrate into one. When the ultrasonic stops, let the pressure last for a few seconds to make it solidified, thus forming a solid molecular chain, to achieve the purpose of welding, welding strength can be close to the strength of raw materials. Ultrasonic plastic welding depends on the quality of the transducer welding head amplitude, pressure and welding time and other three factors, welding time and welding head pressure can be adjusted, the amplitude by the transducer and amplitude
Pole decision. The three kinds of interaction have a suitable value, the energy exceeds the appropriate value, the plastic melting amount is large, easy to deformation of welding; if the energy is small, it is not easy to solder, the pressure can not be too much. This optimum pressure is the product of the length of the welded portion and the edge of the optimum pressure per 1mm
Ultrasonic metal welding principle
Ultrasonic metal welding principle is the use of ultrasonic frequency (more than 16KHz) mechanical vibration energy, connected to the same kind of metal or a special method of dissimilar metals. Metal in the ultrasonic welding, neither to the workpiece to send current, nor to the workpiece to the high temperature heat source, but under the static pressure, the wire frame vibration energy into the workpiece between the friction work, deformation energy and limited temperature rise The The metallurgical bonding between the joints is a solid state welding where the base material does not melt. So it effectively overcome the resistance welding caused by splashing and oxidation and so on. Ultrasonic metal welding machine can copper, silver, aluminum, nickel and other non-ferrous metal filament or sheet material for single-point welding, multi-point welding and short strip welding. Can be widely used in SCR wire, fuse chip, electrical leads, lithium battery pole piece, the ear of the welding.