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> An Alternative To High Frequency Welding Of Pvc Welding, PVC Welding
post May 15 2017, 12:02 AM
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Hot air welding of PVC Welding is an alternative to high frequency welding of PVC. In high frequency welding we use radio waves to heat the two materials directly at the point of contact. Whereas in hot air welding, it usually involves a heatgun to melt the PVC. This is followed up by a roller to press the PVC together resulting in a welded joint.
Pros of Hot Air Welding

There are some great pros to using hot air welding, for example,

It is portable
Great for repair work. Especially where only a little bit of welding is needed.
Relatively fast
No need for 3 phase power or compressed air

Cons of Hot Air Welding

However there are also some large cons, such as,

Far weaker weld than that of a high frequency welding machine
Not suitable for large repair work
May rip or fail if there is moderate tension applied to the pvc canvas
Will perform terribly in unskilled hands Ė spotty welding, burnt patches and other problems.


Ultimately it is a tool that you should have if you need to do any repair work on site, or if minor damage keeps occurring on your tents/marquees/tarpaulins. When youíre actually making your tents, marquees or tarpaulins itís better to go with the high frequency welders. Unless you donít mind your tent falling down on a particular windy day.

If you are interested in buying a high frequency welding machine click here. If youíre looking for a hot air gun then please contact us here.
Technical Aside

There are a couple of reasons why the weld is better on a high frequency welder.

The accuracy of a high frequency welder is better.
Contact between the two sheets of High Frequency PVC Welding Machine (davison-machinery.com) is firmer and tighter.
The very process of high frequency welding means that the material heats just as well in the middle as it does at the surface, something hot air welding does not do.
There are two slits requiring the break to overcome breaking tension twice (see this post).
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