Can You Weld Plastic: 7 Ways To Consider

, March 21, 2022

Can You Weld Plastic

Can you weld plastic? Most people don’t realize it’s possible. If plastic breaks or cracks, sometimes the cheapest way is to weld the pieces. It’s a simple process that every welder should know and master

Can You Weld Plastic?

First, you need to know what kind of plastic you are using. Fortunately, most plastics have an identification tag that you can identify. This is especially true in the automotive industry.

You can weld the thermoplastic with a nitrogen welder. The most common types of plastics, such as ABS, nylon, polyethylene, and polycarbonate, can all be combined. This plastic is often used in applications such as washer bottles, overflows and other practical uses.

If you’re not sure what kind of plastic you have, you can buy test kits for welding with different plastic rods. All you have to do is find the clean surface of the plastic you are welding and choose a rod with the same qualities. Melt the stick until a bead forms, then let it cool. If you can’t remove it with pliers, it’s the right mix for the job.

Welding Processes for Plastics

Can You Weld Plastic

Here’s a list of some welding processes for connecting and joining plastics. Check it out!

1. Friction Welding

Friction welds in thermoplastics are often used to join parts that are injection moulded. It uses friction to generate heat and join two pieces. Friction welding provides many manufacturing benefits, and this technique is often used in the aerospace and automotive industries to join metals and plastics.

2. Laser Beam Welding

This welding technique is used to join pieces of thermoplastic using a laser. The laser beam provides a concentrated heat source that allows for narrow and deep welds with high welding speeds while both parts are placed under pressure.

Speed ​​and precise control are two of its many advantages.

3. Hot Gas Welding

The commonly used welding process for the production of small objects. Hot gas welding uses a specially designed hot air gun. The hot air generated by the gun softens the weldable plastic parts and the plastic filler rod, which should be the same as the plastic material. In addition to the hot gas, a plastic filler material is also added to the weld, which aids in the bonding process.

4. Ultrasonic Welding

Ultrasonic welding of plastics is a common method used for a long time. It uses heat generated by high-frequency mechanical action to fix thermoplastics. This is done by converting high-frequency electrical energy into high-frequency mechanical motion. You can use ultrasonic welding on almost any plastic material. It is known to be cheap, clean and meets quality requirements.

5. Spin Welding

Use a spin welding surface friction directed at the round weld to join the plastic parts. This provides the heat needed to melt the surfaces, which are joined by rotating one of the parts relative to the other. Both parts are kept under a controlled load. If the rotation stops, the joint may cool down.

It can weld large parts and is a fast process, but one of the parts must be round. One of their uses is the sealing of containers.

6. Hot Plates Welding

This process is the thermal welding method used to bond thermoplastics. To melt the two surfaces, a heated metal plate is placed against or near the surfaces and the surfaces are joined under pressure. This method is simple and creates strong joints in most thermoplastics, so it is often used in the mass production of large structures such as large diameter plastic pipes.

7. Vibration Welding

Vibration welding is also called linear welding. The process is to join two plastic parts under pressure. Heat is generated by vibrations along with the common interface. Compared to the hot plate welding, it’s faster and more accurate.


There you have it.

Now that you know that plastic can be welded, it is easy for you to do plastic welding. These processes on how to weld plastic are used mostly by industries. A person can also learn how to weld plastic himself. I hope that you can use some of the ways mentioned above to weld plastic. So, can you weld plastic? The short answer is yes.

Feel free to share your thoughts and ideas in the comment section below.

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