Quote:
Originally posted by unregistered
I seriously doubt the polycarbonate mfgr said that with regards to the dimensional tolerances needed for threaded connections,
and the same problem arises with 'flame' annealing
threading these plastics is rather pointless as there are easier/cheaper ways to affix connectors that are also more reliable
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I gotta hand it to Bill: when he's right, he's right.
-Using a hot tool wouldn't work, because it doesn't allow you to create threads. (plus it could get messy!)
-Using the chemical solution could give inconsistent results.
-trying to hot melt a thread into place would be impractical.
In order to have a thread in plastic, it would have to be molded around a threaded shape, so that a good thread can be made without fractures. Since that's beyond our means, we're left with few options:
-Use an adhesive, to fasten say, a PVC fitting on top of the hole. This would involve drilling a hole in the top, which can be sealed/fixed by any means.
-Drop the whole idea of using a thread, and just glue a straight tube. Slip the tubing over it, and use a hose clamp. ref the polycarb barbs.
-Use a brass (or other favorite metal) threaded sleeve, and JB Weld (actually, use the proper adhesive) it into the top (after the opening has been sealed/fixed). Then screw in whatever you want.