20khz Ultrasonic Plastic Welding Machine

20khz Ultrasonic Plastic Welding Machine

Date:Jan 21, 2021

20khz ultrasonic plastic welding machine

Process Description:

Ultrasonic plastic welding technology is a fusion welding technology. The principle of this technology is to convert friction and vibration energy into heat. The high-frequency vibration generated by the ultrasonic system is transmitted to the parts to be joined through the welding die (called the welding head) under pressure, which will cause relative vibration in the joint area. Frictional heat will cause micro-melting, which hinders vibration, absorbs vibration energy and converts it into heat, and finally causes the welding profile to melt in a very short time, thereby forming a polymer compound. Generally, the welding profile of the plastic parts to be welded must meet the requirements of the corresponding material type and joint.

In ultrasonic sealing, the required heat is only generated in the thermoplastic sealing layer. The contour can concentrate energy, so the sealing time is extremely short. During ultrasonic sealing, heat is generated inside the film. Therefore, there is no need to supply heat from the outside. The mold is kept low during the welding process. The heat generated in the product is extremely low. The temperature balance between the carrier layer and the sealing layer is quickly carried out. This results in a very good thermal weld strength.

1.Vertical technology

This is the most common method of welding plastic parts using ultrasonic waves. Generally, the entire welding system is arranged longitudinally, and vibration is applied longitudinally to the workpiece; the pressure generated by the cylinder pushes the welding shaft of the entire system to pass the force to the upper workpiece.

2.Torsion technique

The system is also completely vertical, but the welding process is completely different. This method is a high frequency friction welding. Vibration application tangential: The welding head moves between the upper and lower workpieces. Through high vibration frequency (20kHz), amplitude and pressure, the two workpieces are fused due to friction.


Scope of application

Ultrasonic plastic welding can weld all thermoplastics. Special attention should be paid to the geometrical joint components of different crystalline plastic parts to weld different crystalline types of plastics.

The welding structure of longitudinal and torsion method is completely different.

Ultrasonic welding can connect different types of thermoplastics (amorphous plastics) to a certain extent, but ultrasonic welding is not suitable for welding thermosetting plastics.

Today, ultrasonic welding has been widely used in the plastics processing industry.

Customer advantage:

1.The best process (longitudinal or torsion process) suitable for the specific application


2."Torsion welding" innovation


3.Work fast


4.Continuous process monitoring guarantees consistently high quality


5.Reliable connection


6.A sealed connection can be achieved even if there is product residue




2.Medical treatment









Previous: Working Principle Of Ultrasonic Food Cutting Machine

Next: Principles And Advantages Of High Frequency Welding Machine