Quote:
Originally Posted by Peakey
I have read in a couple if threads about boiling plastic parts. Can anyone enlighten me of how you do this and is there really that much benefit in doing it?
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Nylon absorbs moisture, and the more water content in the plastic the tougher the part is. If you dry nylon out thoroughly it does become quite brittle. Boiling does two things, first it makes sure there is as much water as possible in the plastic and secondly it stress relieves the parts.
When the parts are moulded they are cooled quickly so they can be removed from the mould and passed on to the next stage in production. This means the outer parts cool much quicker than the core of the part, which puts stresses into the plastic. By boiling them for a minute or two then letting the parts cool down in the water means the cooling is much slower and removes stresses built up when moulded.