Plastic Welding Methods

Leister Hot-air welding

Hand tools, automatic welders, stationary welding machines

In hot gas welding, the thermal energy is controlled. Heated air is fed into the work-piece and the required amount of pressure is exerted onto the wheels.

Leister Hot-Air Welding Method
Leister Hot-Air Welding Method


Leister Hot-wedge welding

Wedge welders

The process where the wedge is heated directly by heating cartridges. The generated heat is transferred directly onto the work-piece. This method also is suitable for thicker materials. 

Leister Hot-Wedge Welding Method
Leister Hot-Wedge Welding Method


Leister Combi-wedge welding

Combi-wedge welding machines

When Combi-wedge welding (combination of a heated wedge and hot air), preheating of the air and the actual welding process is carried out over a wedge. The preheated air also takes partial cleaning of the work-pieces.

Leister Combi-Wedge Welding Method
Leister Combi-Wedge Welding Method


Leister Pendulum Welding

Hand tools

Pendulum welding requires a welding rod similar to the base material. Both surfaces are then heated using hot air. Using an up and down, pendulum-like motion and consistent  downward pressure, the two are joined.

Leister Pendulum Welding Method
Leister Pendulum Welding Method


Leister Speed Welding

(Draw Welding) Hand tools

This welding method requires the use of a speed welding nozzle. Preheat the surfaces to the appropriate temperature. The surfaces are plasticized by hot air and joined under consistent downward pressure.

Leister Speed-Welding Method
Leister Speed-Welding Method


Leister Extrusion Welding

Extrusion Welders (FUSION & WELDPLAST)

In extrusion welding, the substrate is preheated with hot air and connected by adding the extrudate. The welding rod is fed into the heater barrel and the plastic is processed by the extruder screw. 

Leister Extrusion Welding Method
Leister Extrusion Welding Method


© Copyright by Leister