The difference between high frequency welding and ultrasonic welding machine

Ultrasonic welding and high frequency welding under a simple overview

1. A brief overview of ultrasonic welding and high-frequency welding

1) Ultrasound refers to sound waves outside the hearing range of the human ear. Normal human hearing can hear 16Hz (Hz)-20 kilohertz (KHZ) sound waves, sound waves below 16Hz are called infrasound or sub-sound waves, and sound waves above 20 kHz are called ultrasonic waves. (Ultrasonic), ultrasonic welding machine is also the use of ultrasonic technology. The industry is also called ultrasonic plastic welding machine, ultrasonic welding machine.

2) high frequency refers to the frequency of sound waves is greater than 100KHZ, we call it high frequency, high frequency welding machine is the use of high frequency of this technology. The industry is also called high frequency welding machine, high frequency fusing machine, etc.

2. The working principle of high frequency welding machine and ultrasonic plastic welding machine

1) The working principle of the ultrasonic plastic welding machine is that the ultrasonic generator generates 20KHz (or 15KHz) high-voltage and high-frequency signals, converts the signals into high-frequency mechanical vibrations through the ultrasonic transduction system, and adds them to the plastic workpiece. The temperature transmitted to the interface increases through the surface of the workpiece and the friction between molecules. When the temperature reaches the melting point of the workpiece itself, the workpiece interface melts rapidly, the gap between the interfaces is then filled, and when the vibration stops, the workpiece is cooled and shaped under pressure at the same time to achieve effective welding.

2) The working principle of the high-frequency welding machine is that the dielectric material causes the internal molecules of the material to collide with each other under the action of high-frequency electromagnetic, resulting in high temperature and finally achieving the purpose of welding and welding.

3. Characteristics of ultrasonic welding and high frequency welding

Ultrasonic plastic welding machine features:

1) no pollution pollution, green environmental protection;

2) No need for overall heating, the workpiece is not easy to deform, and the power consumption of the machine is small;

3) The welding speed is fast, and the surface oxidation and decarburization of the workpiece is lighter;

4) The surface hardening layer can be adjusted according to the needs, easy to control;

5) The plastic welding equipment is installed on the mechanical processing production line, which is easy to realize the degree of mechanization and automation, convenient management, saving manpower and material resources, and greatly improving production efficiency;

6) The surface of the workpiece has a large compressive internal stress, and the workpiece has a high fatigue breaking resistance.

Features of high frequency welding machine:

1) The power output is strong, the weekly rate of 27.12MHZ or 40.68MHZ generated by the local oscillator is in line with the international industrial band standard, and the special electronic circuits of various control devices can avoid improper operation, and can weld products in a fast time and improve product output;

2) highly sensitive spark protection device, when the spark is generated, can automatically cut off the high cycle circuit, so that parts and objects to reduce damage, when the current is too high, automatically cut off the high voltage to ensure that the oscillation tube and rectifier.

4. Ultrasonic welding and high frequency welding applicable materials

Ultrasonic plastic welding machine is suitable for: ABS,PS,PP,PET,PA,PC, acrylic and other engineering plastics and other plastic materials.

High frequency welding machine use: mainly used for all kinds of PVC,PU,TPU,PET, leather and other materials.

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