Can you use a torch to weld plastic?


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How to use a stripper to weld plastics

Plastic welding is a process for joining parts made of thermoplastic materials. Welding takes place by softening the areas to be joined. The polymer molecules acquire certain mobility by the action of an external agent (heat, vibration, friction, solvent, etc.). When both parts are brought together and pressure is applied to them, the molecules of both parts to be joined interact and interlock. Once the action of the external agent has ceased, the movement of the molecules decreases and an interlocked structure of the molecules is formed, forming the union of both plastic parts.

Welding can be used to produce joints with mechanical properties approaching those of the parent material. Plastic welding is limited to thermoplastic polymers, because these materials can be softened and melted by heat. Thermoset polymers once hardened cannot be softened again by heating. The heat required for welding thermoplastic polymers is less than that required for metals.

Plastic welding with Plastic Fusion

Not to be confused with the oxyfusion welding process, which consists of a flame directed by a torch, obtained by mixing oxygen-acetylene gases. The mixture of flammable gas and oxygen produces a much higher calorific value.

A blowtorch is a tool that generates a flame by gas combustion and the heat of this flame is used for different types of work, usually used in metallurgy. The mixture is made in a nozzle and burns, producing a flame which can be used for soft metal welding, casting, metal tempering, etc.

There are many types of torches of different combustion, the most common for flame torches are butane and propane gas, but you can also find other types of “torches” with other gases such as acetylene, hydrogen, propane, coal, tetrene or crilene. These gases in turn can be mixed with pure oxygen to achieve much higher temperatures. These torches are called oxy-fuel or autogenous torches.


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