An effective weld structure design includes the design of the interference (interference or shear) of the two parts, the flash retaining groove, the rotation angle indicator and the torque bearing lip. The following points should be paid attention to when designing:
1. The upper and lower parts are designed with self-positioning features, which can be easily aligned up and down.
2. In order to prevent deformation, the part structure and wall thickness design should be able to withstand a certain pressure, such as 400-1000N.
3. There must be enough support under the welding rib, especially for thin-walled parts, it is necessary to increase the support flange design.
Compared with traditional ultrasonic welding, plastic laser welding has the following obvious advantages:
1. Clean welding. There is no physical contact with the workpiece to be welded, the thermoplastic does not undergo chemical reaction, and the resin is less degraded. The interior of the plastic parts welded by laser is clean and free of debris, which completely solves the problem of clogging of oil filters and filter products by ultrasonic welding debris. It is also suitable for medical and food industries that require hygiene and safety. The medical industry is mainly used for the processing of injection systems, medical electronic equipment products, etc.
2. The welding quality is good. Precise, firm, airtight and watertight, it solves the problems of damage to components and reduced reliability of precision electronic components made of plastic due to ultrasonic welding.
3. Low welding stress and high weld strength. Compared with the traditional welding method, the thermal stress and vibration stress are greatly reduced, it is not easy to crack in the later stage, and the service life of the parts is greatly extended.
4. Wide adaptability of shape. The shape and size of the laser beam can be adjusted to control the size of the heat-affected zone and the bonding area, with a high degree of freedom and flexibility. It is good at welding products with complex shapes, and can realize two-dimensional or even three-dimensional welding, which provides a basis for the production of diversified customized parts.
5. Beautiful appearance. Using penetration welding plastic laser welding, the outer surface is clean and smooth without welding marks, which can achieve the best of both worlds in strength and appearance.
Plastic Welding Machine manufacturers
Plastic Welding Machine manufacturers