Liaoning Yufei High Frequency Equipment Co., Ltd.

The principle and advantages of high frequency equipment

Opto-electromechanical integration, modern power electronics technology, high frequency load impedance matching is our company's technical expertise. Highly sensitive spark protection system, high strength aluminum alloy plate, Chinese touch screen operation, PLC control and power automatic tracking system, is the domestic leading level. The welding principle and advantages of high-frequency machine are briefly introduced as follows:

In general, high frequency equipment are often used in various industries. For example, PVC and PU products must be welded with high-frequency machines. Common products manufactured by high frequency machine welding include tarpaulin, tent, ceiling, outdoor advertising banner, water bed, inflatable boat, drip irrigation and blood bag, tension structure, conveyor belt, rain clothes, etc.

The principle of high frequency equipment welding is based on the dielectric electric heating of the material to be welded. A sheet of material placed between two metal plates (electrodes) and then a high-frequency voltage is connected to the plastic sheet. As a result, the molecules in the material begin to vibrate, and the molecules are quickly transported to produce heat that is heated to the point of melting. As the two layers pass through the high-frequency current, they are pressed together and the layers melt together to form a welded joint that can withstand strong tensile forces.

The advantage of high frequency equipment is the welding speed: in a few seconds, high frequency welding from the material internal heating and rapid welding.

Other welding methods (with filament, hot air or infrared radiation) are compared with high-frequency machine welding methods, and the heat of other welding methods must be supplemented from the outside. It means that heat must first penetrate the material in order for it to plastically melt enough to form a weld. The main risk of this welding method is to burn out the top layer of the welding material, which means that the surface of the welding material can be easily deformed.

Some materials generate more heat in high-frequency magnetic fields than others and are therefore more suitable for high-frequency machine welding. This is due in part to the fact that the molecules of the material allow themselves to vibrate at high frequencies. This is called the material loss factor. The higher the material loss factor, the easier it is to use high frequency equipment to weld the material. Especially easy to weld thermoplastics, such as PVC and PU; These materials are specially welded by high frequency welding machines. Hard plastics such as PE are difficult to weld with high frequency method.
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