35Khz 1200w Ultrasonic Machine with Quality Management Welding Record Operation Statistics


Description:

Ultrasonic welding machine does not need to add any adhesive, filler or solvent when welding plastic products, nor does it consume a lot of heat source. It has the advantages of simple operation, fast welding speed, high welding strength and high production efficiency. Therefore, ultrasonic welding technology is becoming more and more widely used.
A piece of plastic finished product may be made from a variety of materials or components. The components are combined and processed using mechanical fasteners, adhesives, and welding processes. Among the three joining methods, the welding process has the best effect, and the welding forms are various, and different welding processes can be used according to different materials, sizes, and uses.
The welding principle of the ultrasonic welding machine is to generate high-voltage and high-frequency signals from the generator, and use the energy welding head (hom) to transmit to the plastic processing object, and the plastic contact surface generates high temperature through the friction between the surface of the workpiece and the intrinsic molecules. Instantly dissolves and exchanges the plastic joint surface and completes the fusion process in one second.
Welding results in a bond-sturdy seam with mechanical properties close to the parent material. Plastic welding is limited to thermoplastic polymers because the thermoplastic material can be softened by heating. The thermosetting polymer cannot be softened by heating after hardening. Thermoplastic polymers require less heat to weld than metals.


Specifications:

Parameters:

Factors affecting ultrasonic welding:

Speaking of the weldability of thermoplastics, it is impossible to mention the requirements of ultrasonic bonding for various resins. The most important factors include polymer structure, melting temperature, flexibility (hardness), and chemical structure.

Polymer structure

The non-crystalline polymer molecules are disordered in arrangement, with a significant temperature (Tg glass transition temperature) which gradually softens the material, melts and flows. Such resins are generally effective in transmitting supersonic vibrations and achieving good soldering over a wide range of pressures/amplitudes.

The semi-crystalline polymer molecules are arranged in order, with a distinct melting point (Tm melting temperature) and a re-freezing point. The solid crystalline polymer is elastic and absorbs some of the high frequency mechanical vibrations. Therefore, such polymers are not easy to transmit ultrasonic vibration energy to the pressing surface, which requires a higher amplitude. High energy (high heat of fusion) is required to break the semi-crystalline structure and change the material from a crystalline state to a viscous state, which also determines the apparent melting point of such materials. Once the molten material leaves the heat source, A decrease in temperature causes rapid solidification of the material. Therefore, the particularity of such materials (eg high amplitude, good design of joints, effective contact with ultrasonic fixtures, and excellent working equipment) must be considered in order to achieve the success of ultrasonic welding.

Polymer: Thermoplastic and thermoset

The process of bonding monomers together is referred to as "polymerization." Polymers can be broadly classified into two broad categories: thermoplastic and thermoset. The thermoplastic material can be softened and shaped again after thermoforming, and the base undergoes only a change in state - a property that determines the suitability of the thermoplastic material for ultrasonic compression. Thermosetting materials are produced by irreversible chemical reactions. Reheating or pressurization does not soften the formed thermosetting products. Therefore, thermosetting materials have traditionally been considered to be unsuitable for use with ultrasonic waves.

Melting temperature

The higher the melting point of the polymer, the more ultrasonic energy it needs to weld.

Hardness (elastic coefficient)

The hardness of the material is very effective in its ability to effectively transmit supersonic vibration. In general, the harder the ultrasonic power source material, the stronger its conductivity.

Ultrasonic welding:

The welding head vibrating at the ultrasonic frequency rubs the heat at a predetermined time and pressure to fuse the plastic joints to each other, which is firm and convenient.

35Khz 1200w Ultrasonic Machine with Quality Management Welding Record Operation Statistics