The Ultrasonic Plastic Welding machinehas developed rapidly since its appearance in the 1950s. It is widely used in the connection between the same or dissimilar metals, cermets, semiconductors, composite materials, plastics and other materials. Ultrasonic welding is a solid-state welding process that does not require the addition of filler metal and solder. During the welding process, the bonding and diffusion between atoms occur in solid and semi-solid states, so it is a "cold diffusion" connection technology. Its main feature is that it can realize the connection of materials with lower heating temperature and smaller deformation, and the welding temperature generally does not exceed the melting point of the material.
Ultrasonic welding classification
Ultrasonic welding can be divided into two basic types according to the direction of the high-frequency vibration generated by the ultrasonic frequency into the welding workpiece. The first basic type is that the elastic vibration energy generated by the ultrasonic frequency is transmitted from the tangential direction to the surface of the welding workpiece, causing relative friction between the surfaces of the workpieces that are in contact with each other and accompanied by a local temperature increase. This type of ultrasonic welding is mainly suitable for metals. Welding of materials. The second basic type is that the elastic vibration generated by the ultrasonic frequency can be transmitted to the welding workpiece from the direction perpendicular to the workpiece. This type of ultrasonic welding is mainly suitable for the welding of plastics.
In ultrasonic metal welding, the welding area is not energized, does not use welding rods, and does not directly heat the welding metal area, so that high-precision welding parts can be obtained, and it also has the advantages of fast welding speed, high welding spot strength, and automatic welding. Ultrasonic plastic welding is a welding method that converts sound energy into heat energy, melts the plastic in the welding area and bonds them together. Its advantages are that the welding speed is fast, the welding surface is flat, and the non-welding area is not affected. It is currently widely used in food packaging, aerospace and other industries.
There are many classification methods for plastic ultrasonic welding. According to the nature of the material, it can be divided into thermoplastics, thermoplastic composite materials, metal/plastic (such as aluminum-plastic composite pipes); according to the welding form, it can be divided into near welding (direct welding) and far welding ( Transfer welding); according to different processes, it can be divided into: ultrasonic guided welding, ultrasonic groove welding, ultrasonic trimming welding, ultrasonic welding and ultrasonic riveting welding.
Ultrasonic welding equipment is classified according to whether the control device, power supply and transmission device of the welding equipment are separated. The welding equipment can be divided into two types, one is a modular system and the other is an integrated system.
In the ultrasonic welding process, the upper and lower joints must be overlapped with each other. According to the different forms of welding mold joints, it can be divided into four forms: spot welding, seam welding, ring welding and wire welding. The welds obtained by different forms of ultrasonic welding are also different, and the corresponding welds are weld joints, sealed continuous welds, girth welds and straight continuous welds.
In addition, ultrasonic welding can be simply divided into two types: ultrasonic metal welding and ultrasonic plastic welding according to the welding material.
Plastic Welding Machine manufacturers
Plastic Welding Machine manufacturers