Liaoning Unify 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 welding 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.
Related News
  • How to Deal with the Faults of HF Welding PVC?

    How to Deal with the Faults of HF Welding PVC?

    May 24, 2019If the time of hf welding pvc is too long, there are often some faults. After the failure occurs, users must find and deal with it in the first time and solve it in time. For different faults, the sol...view
  • Introduction of High Frequency Welding

    Introduction of High Frequency Welding

    July 29, 2019High frequency welding is a new welding process that uses the skin effect and adjacent effect generated by high-frequency current to connect steel plates with other metal materials. The emergence and ...view
  • The Advantages of High Frequency Machine

    The Advantages of High Frequency Machine

    July 29, 20191. The starting current is small. The high frequency machine only needs 0.2~0.3 times of rated current to generate 1.5~2 times of rated starting torque. Whether it is brush or brushless DC motor, it n...view
  • How To Solve The Welding Problems Of PVC Membrane Welding Machine

    How To Solve The Welding Problems Of PVC Membrane Welding Machine

    May 24, 2019At present, pvc membrane welding machine has been widely promoted in a number of plastic welding industry. Various welding defects are inevitable in the process of use. In this article, it mainly anal...view
  • Operation Procedure Of HF Welders

    Operation Procedure Of HF Welders

    May 24, 2019Hf welders machine is mainly used for processing plastic products in industry. It has 5 kinds including foot type, push plate type, rotary plate type, high power and high frequency welding machine. Th...view
  • Welding Methods and Principles of PVC Welding Technology

    Welding Methods and Principles of PVC Welding Technology

    July 29, 2019Welding method1. PVC welding welding method: Ultrasonic vibration is transmitted to the weldment with the welding head. Since the sound resistance of the two weldments is large, local high temperature...view