Theoretical Knowledge of Ultrasonic Plastic Welding Machine
How does ultrasonic welding work?
The principle of ultrasonic welding is to convert 50/60 Hz current into 15, 20, 30 or 40 kHz electrical energy through an ultrasonic generator. The converted high-frequency electric energy is again converted into mechanical motion of the same frequency through the transducer, and then the mechanical motion is transmitted to the welding head through a set of amplitude modulator devices that can change the amplitude. The welding head transmits the received vibration energy to the joint of the workpiece to be welded. In this area, vibration energy is converted into heat energy through friction, thereby melting the plastic. Ultrasound can be used not only to weld rigid thermoplastics, but also to process fabrics and films.
The main components of the ultrasonic welding system include ultrasonic generator, transducer/amplifier/triple welding head, mold and frame
How does linear vibration friction work?
Linear vibration friction welding uses frictional heat generated on the contact surface of two workpieces to melt plastic. The thermal energy comes from the movement of the workpiece with a certain displacement or gradient on another surface under a certain pressure. Once the desired welding level is reached, the vibration will stop, and a certain amount of pressure will still be applied to the two workpieces to cool and solidify the newly welded parts to form a tight bond.
How does rail vibration friction work?
Orbital vibration friction welding is a method of welding using frictional heat energy. When performing orbital vibration friction welding, the upper workpiece performs orbital motion at a fixed speed-displacement motion in all directions. Movement generates heat, which causes the welded part of the two plastic parts to reach a melting point. Once the plastic starts to melt, the movement will stop, and the welded parts of the two workpieces will solidify and be firmly joined together. Smaller clamping force will result in minimal deformation, and can weld workpieces less than 10 inches in diameter by applying orbital vibration friction.