Welding vibration

Thermoplastics Mechanical Fasteners Adhesives Spin and Vibration Welding Thermal Welding Ultrasonic Welding Induction Welding Remarks... 

Journal of Vinyl and Additive Technology 6, No.3, Sept.2000, p.158-65 HOT-TOOL AND VIBRATION WELDING OF POLY(VINYL CHLORIDE)... 

Structural foam Due to low pressures, significant design Good structural integrity Sprue removal Lower tooling cost Vibration welding, ultrasonic... 

C.Y. Wu, L. Trevino, Vibration Welding of TPO, SPE, ANTEC 60th Annual Technical Conference (2002)... 

There are many different, cost-effective welding methods suitable for industrial mass production of plastics engineering components including ultrasonic, laser, spin, hot plate, linear and orbital vibration welding. Here we will deal with inexpensive manual methods for low quantities which can be carried out in small workshops or on site. 

Responds well to joining technologies, such as chemical bonding, ultrasonic welding, vibration welding, and heat staking... 

Vibration welding is similar to ultrasonic welding except that it uses a lower frequency (120 to 240 Hz) of vibration. In this way, very large parts can be bonded. The two thermoplastic parts are rubbed together, under pressure and at a suitable frequency and amplitude, until enough heat is generated at the joint interface to melt and diffuse the polymer surfaces. 

The process parameters affecting the strength of the resulting weld are the amphtude and frequency of motion, weld pressure, and weld time. There are two types of vibration welding linear, in which friction is generated by a linear motion of the parts, and orbital, in which one part is vibrated using circular motion in all directions. Examples of these processes are illustrated in Figure 7.26. 

FIGURE 7.26 The vibration welding process. Linear vibration (left) is employed where the length to width ratio precludes the use of axial welding (right) where the axial shift is still within the width of the welded edge. 

Vibration welding is nsed extensively by the automotive industry in the manufacture of components snch as car bumpers, air intake manifolds, fuel pumps, instrument panels, parcel shelves, inner door panels and for the hermetic sealing of air ducting to the internal surface of the dashboard. Other applications include spectacle frames, typewriter covers, filter housings, motor saw housings and heating valves. 

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