plastic welding

[pjf134]

Plastic welding can be done only on some plastics, but had some success on some that don't. Molded plastic tanks are cross linked PE most of the time and can not be welded, so they say, but I have done it. I have a pro welder and works good. I have also used a solder gun to weld plastic and it worked too. The trick is to fuse together without burning thru just like metal welding. I have had success filling with filler rod and add a band around the tank to keep pressure on the seam using some sort of sealer too. Too much heat or not enough is not good, just make it tackey for a good bond and keep pressure on the filler rod at the same time. I use around 10 psi air on my gun and works fine, it's a knac to do it right and takes time to master it. I use to work at a plastic fab shop back in the 80's.
Paul