We are experts in permanent joints.

Job welding for volume parts and prototypes.

Ultrasonic welding:
Ultrasonic welding in the plastification process requires heat gained by converting ultrasonic vibrations of > 20 kHz into mechanical vibrations. Fusion takes place by the vapour pressure of the plastic.

Advantages:

• High strength and sealing characteristics.
• Short welding time (a few seconds).

Applications:

• Geometrically small formed parts in volume production.
• Embedding metal parts.

Vibration welding
(vibration friction welding):
The plastic is fused by friction produced at the jointing surfaces of the workpiece.

Advantages:

• Welding different plastics together under specific conditions.
• Welding a continuous seam on large parts with part welding surface area.
• High strength and sealing characteristics.
• Welding process easily automated.
• Short welding times (a few seconds).

Applications:

• Large jointing parts in volume production.
• Welding mostly injection-moulded formed parts.

Heat element welding:
The plastic is fused along the contact surfaces by a heat element.

Advantages:

• The welding seam has high stress resistance; base material strengths are attainable even with unreinforced materials.
• Three-dimensional contours are no problem using contour heat elements.

Applications:

• Parts with 2-dimensional joint surfaces.
• Parts with 3-dimensional joint surfaces.

Hot gas welding:
Hot gas welding is carried out by hand. In this process, the welding surfaces are heated to fusion temperature by a welding rod and hot air, and they are then welded under pressure.

Advantages:

• Excellent for prototypes and small batches, apparatus construction.

Applications:

• Complex joints easily welded. Excellent for repairing cracked plastic parts.
• Requires welding filler (round bar).