In the welding of plastics, two similar thermoplastic components are joined under heat and pressure. A dimensionally-stable and permanent bond arises after cooling.

Ultrasonic welding

Ultrasonic welding uses pressure as well as the friction heat generated by ultrasound vibrations to melt the plastic elements to be joined. Filler material is not necessary. Mash seam welding is recommended for very strong weld joints of crystalline thermoplastics. Fully-automated welding is very quick and uses very little energy. G.W.P. uses ultrasonic welding to join large numbers of components.

Advantages of Ultrasonic Welding

• Very economical at higher volumes
• Very short welding cycles
• Lower energy expenditure
• For three-dimensional joint surfaces
• No post-processing needed
• Processing according to DIN 1910-3  

Other plastic welding methods

• Hotplate welding
• Extrusion welding