Plastic welding

Permanent joining of plastics with the help of a welding wire or without it (butt welding) is called welding. It is the process used for polypropylene . At KK SOLUTIONS we offer our business partners access to modern and advanced services in the field of plastic welding. All this is done to ensure that the products obtained are of the best quality.

What exactly is the plastic welding process?

Polymers have a much lower melting point than steel or aluminum. This means that less energy is needed to achieve a permanent bond between the parts being welded. As with other metal welding processes, it is of course necessary to use a welding wire for modules or containers.

The interaction of heat and pressure permanently bonds and completely fuses the polymer molecules of the materials being joined. As a result, the parts of the workpiece are inseparably joined.

When and where is polymer welding used?

Polymer welding is of great importance in the manufacture of tanks. Wherever factory machine welding is not possible, welding is used. This method ensures high productivity with consistent precision and the highest welding quality.

Of course, permanent joining of plastic parts is also realized for smaller products, e.g. welding of pipes, pump and filter.

What are the main principles of welding plastics?

It seems that welding polymers is a very simple process. However, there are some rules to follow when performing it. These are common when joining certain components, but some apply only when welding plastics.

Preparation of the surface

Without a perfectly cleaned surface for welding components, it is difficult to achieve a very good weld quality. Therefore, the parts to be welded should be cleaned very carefully before starting the welding work. It is highly recommended to thoroughly prepare the surface with abrasives, dust extraction and alcohol (e.g. isopropylene).

Qualification of welders

The welders at KKS are all trained and regularly inspected and certified by TÜV - Süd in order to meet the highest requirements.

Welding temperature

It happens that some polymers have a very fast plasticization but are not yet weldable. For others, it can be difficult to maintain a slightly excessive melting temperature throughout the weld.

Both too low and too high temperatures are unsuitable for welding polymers. In the first case, the weld will break; in the second, material continuity will be broken and strength will be compromised.

Insufficient joining force and uneven heating of the materials.

The last two points refer to the applied force and the uniform heating of all surfaces. Even very good heating of components may not be sufficient if areas to be bonded are joined with too little force.

On the other hand, heating only one area will result in a poor bond because not all materials will be plasticized.

Contact the experts at KK SOLUTIONS for assistance.

We turn our experience in welding and processing a wide variety of plastics into customer benefits. Use the contact option right now and entrust our experts with your ideas, we will implement them in the best possible way.