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The working principle of plastic welding machine
Jan 24, 2018

1, Ultrasonic plastic welding machine working principle

The principle of ultrasonic welding is to convert 50/60 Hertz current to 15, 20, 30 or 40,000 hertz electricity through an ultrasonic generator. The converted High-frequency electrical energy is again converted to the same frequency mechanical motion through the transducer, and then the mechanical movement is passed to the solder head through a set of amplitude modulation devices that can change the amplitude. The welding head transmits the vibration energy received to the joint of the workpiece to be welded, in which the vibrational energy is converted into heat energy by means of friction, which melts the plastic. Ultrasound can be used not only to weld hard thermoplastic plastics, but also to process fabrics and films. The main components of an ultrasonic welding system include ultrasonic generator, transducer/amplitude modulation/welding head triple Group, mould and rack.


2, Rotating friction plastic welding machine working principle

Rotary Friction plastic welding machine is generally used to weld two round thermoplastic workpiece. When welding, one workpiece is fixed on the base die, and the other workpiece rotates on the surface of the workpiece being fixed. Due to a certain pressure on the two workpiece, the friction between the workpiece generated by the heat can make the contact surface of two workpiece melting and forming a closed and airtight combination. The positioning of the melt is in the set time rotation, instantaneous stop in the set position, become a permanent fusion.


3, Hot plate welding machine working principle

Hot plate welding machine mainly through a temperature-controlled heating plate to weld plastic parts. When welded, the heating plate is placed between two plastic parts, and when the workpiece clings to the heating plate, the plastics begin to melt. After a preset heating time in the past, the workpiece surface of the plastic will reach a certain degree of melting, at this time the workpiece to the two separate, the heating plate removed, and then both pieces of workpiece together, when a certain welding time and welding depth, the entire welding process completed.


4, laser plastic welding machine working principle

Laser Welding Machine Working principle is to make light/laser beam through a plastic part of the surface of another plastic parts (i.e. welding surface); The weld surface is heated and melted when the beam energy is fully absorbed, so that it is tightly bonded by applying an adjustable clamping force to two pieces of plastic. Compared with other existing plastic welding process, the advantage of laser welding process is that the light/laser beam can simultaneously heat and weld the whole welding surface, and the welding effect is more obvious. Four, linear vibration friction welding machine working principle linear vibration friction welding utilizes the friction heat energy produced by the contact surface of two welding parts to melt the plastic. Heat energy from a certain pressure, one workpiece on the other surface with a certain displacement or amplitude reciprocating movement. Once the desired degree of welding is reached, the vibration will stop, and there will still be some pressure exerted on the two workpieces to cool and solidify the freshly welded parts, thus forming a close bond.


5. The working principle of the track type vibration friction welding machine

Rail-type vibratory friction welding is a method of welding by friction heat energy. In the orbit-type vibration friction welding, the upper part of the workpiece at a fixed speed of the orbital movement-in all directions circular motion. Exercise can produce heat energy, so that the welding parts of two plastic parts reach the melting point. Once the plastic begins to melt, the movement stops, and the welded parts of the two workpiece are solidified and firmly connected together. The small clamping force causes the workpiece to produce the smallest degree of distortion, the workpiece diameter within 10 inches can be welded with the application of track vibration friction.


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