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because of the difference in physical characteristics of thermoplastics and metals, there are corresponding differences between welding techniques for metals and thermo-plastics.

in the welding of metal, welding rod and parent material become molten and fuse into the required bond to form welded joints.

this is not in thermo plastics, because they are poor heat conductors , they are difficult to heat uniformly ..

so diifferent methods are used to weld plastics...

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How welding can be defined?

welding is a process which joins two dissimilar metals........ Actually it is more than that. Welding is a process that involves the application of heat to either add more material or join pcs. together. It is not used just for metals (dissimilar or not) but glass, plastics and more. The pcs. to be welded must melt in order for it to be called welding. Soldering, silver soldering, and brazing are comparable to glueing.


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Related Questions

What is the industrial use of acetylene?

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