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  Screw output

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Author Topic:   Screw output
Wayfast
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Posts: 1
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Registered: Jun 2001

posted June 04, 2001 11:46 AM     Click Here to See the Profile for Wayfast     Edit/Delete Message   Reply w/Quote
What is the best way to determine how much output I should be getting out of a screw?

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admin2
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Posts: 15
From:fl
Registered: Jun 2001

posted June 05, 2001 11:06 AM     Click Here to See the Profile for admin2   Click Here to Email admin2     Edit/Delete Message   Reply w/Quote
A first estimate can be had by multiplying the screw diameter time itself times 2 times the screw pumping depth and finally times the material melt density. Be careful to watch your units when calculating your answer. Your actual rate should be somewhere between 70% to 90% of this number to account for discharge pressure.

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louis33
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Posts: 146
From:Allentown, PA - USA
Registered: Jun 2001

posted June 06, 2001 09:07 PM     Click Here to See the Profile for louis33     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Wayfast:
What is the best way to determine how much output I should be getting out of a screw?


Check the plastics.com site - they had a discussion that went into some depth on just that subject! (Extrusion or molding forum I think?)

Louis

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