What is ultrasound? What is high frequency wave (high frequency wave)? 

1. Ultrasound refers to sound waves beyond the hearing range of the human ear. Normal human hearing can hear sound waves between 16 Hz (Hz) and 20 kHz (KHZ). Sound waves below 16 Hz are called infrasonic waves or subsonic waves. Sound waves exceeding 20 kHz are called ultrasonic waves (ultrasonic waves). Sonic) ultrasonic welding machine also uses the technology of ultrasonic waves. Some people in the industry also call it ultrasonic plastic welding machine and ultrasonic welding machine.

2. The so-called high frequency refers to when the frequency of the sound wave is greater than 100KHZ, we call it high frequency. The high frequency welding machine uses this high frequency technology. The industry also calls it high-frequency welding machine, high-frequency fuse machine, etc.

 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 a 20KHZ (or 15KHZ) high-voltage and high-frequency signal through the ultrasonic transducer system, which converts the signal into high-frequency mechanical vibration, which is added to the plastic workpiece and passes through the workpiece surface and The friction between molecules increases the temperature transmitted to the interface. When the temperature reaches the melting point of the workpiece itself, the workpiece interface melts rapidly and then fills the gaps between the interfaces. When the vibration stops, the workpiece is cooled under a certain pressure at the same time. Effective welding can be achieved by setting the shape.

2. The working principle of the high-frequency machine is that the dielectric material undergoes molecular polarization under the action of the high-frequency electric field and is arranged in the direction of the electric field. It uses its own high-frequency oscillator to instantly generate thermal energy to fuse the upper and lower molds together. The extruded product is strong and beautiful!

Characteristics of ultrasonic waves and high frequency waves Characteristics of ultrasonic waves:

Characteristics of ultrasound:

1. There is no need for overall heating, the deformation of the workpiece is small, and the power consumption is small.

2. No pollution, no pollution, environmentally friendly products.

3. Moreover, the heating speed is fast, and the oxidation and decarburization of the workpiece surface is lighter.

4. The surface hardened layer can be adjusted as needed and is easy to control.

5. Plastic welding equipment heating can be installed on the mechanical processing production line, which is easy to realize mechanization and automation, easy to manage, and can reduce transportation, save manpower and improve production efficiency.

6. The martensite structure of the quenched layer is finer, with higher hardness, strength and toughness.

7. The surface layer of the surface workpiece has large compressive internal stress, and the workpiece has a high resistance to fatigue fracture.

Characteristics of high frequency:

1. The output power is powerful. The cycle rate generated by the local oscillator is 27.12MHZ or 40.68MHZ, which complies with the international industrial band standards. The special electronic circuits of various control devices can avoid improper operations, and can weld products in a timely manner and increase product output. 2. Highly sensitive spark protection device. When sparks are generated, it can automatically cut off the high-cycle circuit to reduce damage to parts and objects. When the current is too high, it can automatically cut off the high-voltage oscillation tube and rectifier.

Application of ultrasonic waves and high frequency waves

Ultrasound is widely used in current production, such as welding, cutting and slitting of various non-woven/chemical fiber cloths, welding of plastics, etc. However, due to the difference in the working principles of ultrasonic and high-frequency, the raw materials and There will also be certain differences in application areas.

Ultrasonic plastic welding machine is a welding equipment widely used in the field of plastic welding. It is referred to as ultrasonic plastic welding machine in the industry. Various thermoplastic parts such as ABS, PS, PP, PET, PA, PC, and acrylic can be welded using ultrasonic welding. When welding plastic products, no adhesive, filler or solvent is added, and a large amount of heat is not consumed. , has the advantages of easy operation, fast welding speed, high welding strength and high production efficiency. Widely used in the automotive industry, electronics industry, medical industry, home appliance industry, cloth-free clothing, office supplies, packaging industry, toy industry, etc.

High frequency is mainly used for various polyvinyl chloride (PVC) PU, TPU, PET, leather, leather cases, computer leather cases, mobile phone leather cases, various popular leather cases welding, cutting, molding, plastic welding, welding, hot stamping, etc. The high-frequency category currently includes high-frequency plastic welding machines, high-frequency plastic fusing machines, high-frequency folding box creasing machines, high-frequency metal melting and casting machines, high-frequency metal heating machines, etc.