Time:2023-08-21 Views:1 source:News
Recently, many customers have inquired about the welding characteristics of Jiazhao’s ultrasonic machine. In fact, most commonly used injection molding polymers can be welded by ultrasonic welding, but the difficulty of ultrasonic plastic welding is related to many characteristics of the welded itself. The greater the friction coefficient of the plastic , the poorer the thermal conductivity, the easier it is to form a molten layer at the interface, the better the ultrasonic welding performance, the harder the plastic is, and the ultrasonic welding is super easy due to the small vibration transmission loss during plane welding. state, the temperature range is very narrow, very fast, the fault connection performance is poor, and the adjustment is difficult. When soft plastic is riveted and welded, its ultrasonic welding performance is easier than that of hard plastic. At present, all kinds of plastic products emerge in endlessly. Here is a brief introduction to the ultrasonic welding performance of several common plastics.
(microcomputer PLC ultrasonic welding machine)
1), ABS.HIPS.PMMA.MPPO: rigid non-crystalline material, very easy to transmit the ultrasonic frequency of 20000HZ, so it is especially suitable for ultrasonic welding, no matter the distance between yuan or short distance, it can achieve good welding effect;
2) PC PSU: The material has a high melting point and strong hygroscopicity, so it should be dried before welding, otherwise the moisture in the material will hinder the welding strength, and the moisture will consume more energy during welding and the welding time will be longer;
(20K standard ultrasonic welding machine)
3) PA: It is a crystalline material with strong hygroscopicity, so it should be dried before welding;
4) PP PE: It is a crystalline material, and there will be a large loss when ultrasonic waves are transmitted, so long-distance welding is difficult;
5) PVC: It is a soft material with a low melting point, and the ultrasonic energy loss is large. When welding, it is easy to burn the surface of the weldment.
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