subject: Ultrasonic Plastic Welding Process Technology - Plastic Welding - Plastic Industry [print this page] Contemporary society, Plastic A variety of products, has penetrated into all areas of daily life, but also been widely applied to aviation, marine, Car , Toy , Electronic And other industries. However, the injection molding process and other factors, a considerable part of the complex shape Plastic Products Not an injection molding, which requires bonding, and use for many years and the heat sealing plastic bonding process it is relatively backward, and not only inefficient, and there are some toxic adhesive, causing environmental pollution and labor protection. The traditional application of this technology is no longer the development needs of the modern plastics industry, so a novel plastic processing technology?? Ultrasonic plastic welding for its efficient, high quality, beautiful, energy saving and other advantages come to the fore.
Ultrasonic plastic welding machine plastic welding, that is not to fill any additional adhesive, filler or solvent, nor spend a lot of heat, easy operation, welding speed, welding, high strength, the production efficiency. Therefore, the ultrasonic welding technology to be applied more extensively.
1, ultrasonic plastic welding machine works.
When the ultrasonic role in the thermoplastic plastic contact surface, it will generate tens of thousands of times per second, high frequency vibration, which reached a certain amplitude of high frequency vibration through the welds to ultrasonic energy transmitted to the welding area, due to welding areas that cross the interface of two welded large acoustic impedance, so it will produce local temperature. Also, because of poor thermal conductivity of plastic, one was also unable to timely distribute, gathered in the weld area, resulting in two plastic contact surface rapidly melting, coupled with some stress, to get together. When the role of ultrasound to stop after a few seconds so that the pressure to make coagulation, thus forming a strong chain, to achieve the purpose of welding, the welding strength can be close to raw strength. The quality depends on the ultrasonic plastic welding welding head transducer amplitude, which increases the pressure and welding time of three factors, welding time and weld head pressure is adjusted, the amplitude of the transducer and the horn decisions. These three have a suitable amount of value with each other, the energy exceeds appropriate value, the plastic melting on the large amount of welding material easy to deform; if the energy is small, difficult to weld, the pressure increase can not reach large. The best part of the pressure is welded with the edge of the side of the optimum pressure for each product 1mm. Second, ultrasonic plastic welding method
1, welding method with ultrasonic vibration transmission to the ultrasonic welding head to weld parts, welding parts as two large sound on resistance, resulting in local temperature, so that the interface melt welded. Under some pressure, so that the two welds to beautiful, fast, strong welding effect.
2, buried nuts or interpolation Other For insertion of a plastic piece of metal. Transmitted first ultrasonic metal by high-speed vibration, so that the metal directly embedded within the plastic molding the same time, the plastic melt, after the completion of the curing buried inserted.
3, riveting wishing to two properties of metals and plastics or bonding together of different plastics, can make use of ultrasonic riveting to welding pieces of hard brittle, beautiful, strong.
4, spot-welding method using a small welding head to two points a large plastic welding, or welding of the first row of dentate direct pressure on the two plastic parts, thus achieve the effect of spot welding.
5, forming method of using ultrasound to melt plastic parts molding moment, when the plastic solidified metal can or other plastic solid materials.
6, excision using welding head and the base of the specially designed form, just as plastic parts injection, the direct pressure on the plastic branches, and through conduction to remove the effect of ultrasound.
