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Home > Science > Other Science   »   plastic moulding

 
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Old Oct 20, 2005, 11:22 AM
vyki
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plastic moulding

what are the bits of plastic that are cut off and disgarded after the moulding process?
I think it's a word like scree or scrag??

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Old Oct 20, 2005, 01:08 PM   #2  
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I think the most common term is flashing.
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Old Oct 20, 2005, 10:26 PM   #3  
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Flashing is one of the bits you cut off. That's the bits that leak into gaps that aren't meant to be in the mould.
But i was think of the bits that are deliberatley moulded and then disgarded...
Sprigs maybe? The "sticks" that hold the pieces together.
I used to work in a plastic moulding factory while I was a student and it's bugging me that I can't remember!
Sorry i'm not explaining this well...
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Old Oct 21, 2005, 05:40 PM   #4  
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I guess you cut off and discard both flashing and sprules. (sp?) Runners too, the sections coming out of the molding machine and distributing the plastic to the sprules.

For a while, I managed a small vinyl compounding plant. Most of the pellets we made were extrusion grade, but we spent about one week a month producing molding compound. I saw all the stuff in the scrap returned for reprocessing.

Nice thing about this site is how easy it is to try again.

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vyki agrees: thanks that was driving me insane
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Old Oct 22, 2005, 04:09 AM   #5  
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thank you, that's been driving me nuts for months!
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Old Oct 22, 2005, 06:48 AM   #6  
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Sprues, not sprules

Like I said, it is easy to try again. I thought to look in the dictionary, and it was there, but no ''l''. it has been about 20 years since I worked in the plastic industry.

Thank you for you comment and rating. Unfortunately, it looks like somebody else gave it a bad rating. I have offended some here, and they are risking confusing people coming here for answers by giving mine bad ratings.

Anybody with a dictionary can verify that sprue is the correct term. If somebody wanted to correct my original spelling, they should have posted it where you could see it. I am here to help. I am not sure what the agenda is of those giving my helpful answers bad ratings.
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Old Oct 23, 2005, 01:01 PM   #7  
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That was very mean of them.
Did they say why the bad rating? It would be much more helpful if people posted spelling corrections etc instead of rating badly..
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