35Khz Ultra Spot Handheld Welding Machine Fast Clean Efficient Assembly Process for Auto


Description:

35K ultrasonic welding is a fast, clean and efficient assembly process. A method for assembling and processing thermoplastic fittings and some composite components.
The principle of ultrasonic plastic welding is that the high-voltage and high-frequency signals generated by the generator are converted into high-frequency mechanical vibrations through the transducer system, which are applied to the workpiece of plastic products, and are transmitted to the workpiece through friction between the workpiece surface and the internal molecules. The temperature of the interface increases. When the temperature reaches the melting point of the workpiece itself, the interface of the workpiece melts rapidly, and then fills the gap between the interfaces. When the vibration stops, the workpiece is cooled and shaped under a certain pressure at the same time to achieve a perfect welding effect.

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Influence of plastic parts material on welding efficiency of ultrasonic welding machine:

1. Ultrasound propagates in plastic parts. Plastic parts more or less absorb and attenuate ultrasonic energy, which has a certain impact on the effect of ultrasonic processing. Plastics are generally divided into amorphous materials, and there are hard glue and soft glue according to hardness. There are also differences in modulus. Generally speaking, the ultrasonic processing performance of plastics with high hardness and low melting point is better than that of plastics with low hardness and high melting point. Therefore, this involves the problem of the distance of ultrasonic processing.
2. The influence of the processing conditions of plastic parts on ultrasonic welding. Different processing forms of plastic parts through injection molding, extrusion or blow molding, and different processing conditions will form factors that have a certain impact on ultrasonic welding.
A. Humidity defects: generally formed in the process of making striped or loose plastic parts. Humidity defects attenuate energy during welding, make the sealing position seep water, and prolong the welding time. Therefore, plastic parts with high humidity should be dried before welding. treatment, such as polyoxymethylene, etc.
B. Influence of injection molding process: The adjustment of injection molding process parameters will lead to the following defects: dimensional changes (shrinkage, bending deformation); weight changes; surface damage; poor uniformity.
C. Shelf life: After the plastic parts are processed by injection molding, they are generally placed for at least 24 hours before welding to eliminate the stress and deformation of the plastic parts themselves.
shape and other factors. Plastic parts made of amorphous plastic by injection molding may not meet this requirement.
D. Recycled plastic: The strength of recycled plastic is relatively poor, and the adaptability to ultrasonic welding is also poor, so if recycled plastic is used, various design dimensions should be considered as appropriate.
E. Release agent and impurities: release agent and impurities have a certain influence on ultrasonic welding. Although the solvent and impurities on the machined surface can be shaken away during ultrasonic processing, they should be removed as much as possible in the case of sealing or high strength. In some cases, it is necessary to clean the plastic parts first.


35Khz Ultra Spot Handheld Welding Machine Fast Clean Efficient Assembly Process for Auto