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Posts Tagged ‘base’

Question by Brijesh: Plastic Injection Molding Operation, Need 2 purge the barrel from Blue 2 White. (polyolefin base)?
Traces of blue color is not cleaned completely.

Best answer:

Answer by markmold
There are several commercially available purging compounds that work quite well. I’m assuming you want the quick fix though. When I don’t have any of the commercial stuff available I usually reach for some acrylic regrind that I have lots of on hand and was given by another molder. If you have any blowing agent this also works well.
Here’s an old molders trick try sprinkling a little Baking Soda into the mix and crank up the temps a bit, a few drops of water won’t hurt either. It might foam up a bit but it’ll scrub the residuals out.

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