Vibration Welding Principle
The vibration method of assembly, when compared with ultrasonic assembly, is particularly advantageous for semi-crystalline resins such as acetal, nylon, thermoplastic polyester, polyethylene, and polypropylene, as well as PVC, cellulosics, thermoplastic rubber, and elastomers, filled and reinforced resins, and those exhibiting hygroscopic properties. Fillers such as glass, minerals, talc, and mica do not present a problem for the process, as long as the percentage is kept under 40%. Different grades of a material can be welded to each other.
Vibration welding replaces ultrasonic welding in many troublesome applications, since the ultrasonic process relies on transmitting energy through the part to the joint interface. For example, the ability to transmit weld energy is dependent upon the grade of material, as well as part shape and size, the percentage of regrind, the heat history of the plastic, as well as the color additives, melt flow index and filler content. Vibration welding is not subject to the same constraints, since energy is not transmitted through the part, but rather it is generated directly at the interface.
Our engineers have a great deal of experience with vibration welded components and can assist you with component design or advice on the correct the best method of welding for your application.