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mass flow rate of an extruder screw

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Topic: mass flow rate of an extruder screw

Aaron C
Member

Posts: 1
From:SD USA
Registered: Jun 2003

posted June 29, 2003 12:36 PM

I am trying to find out if the mass flow rate of a feedscrew increases linearly with increase in RPM. My supplied information says it should be linear, but my experimental data shows it to be second-order. I am using a 1/4" 8 pitch feed screw to transport 316L SS with a powder size distrobution from 180 to 45 microns. Please call if you need more information. Thanks! Aaron

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Bob Cunningham
Senior Member

Posts: 47
From:Amesbury, Mass
Registered: Nov 2002

posted July 01, 2003 02:28 PM

Not linear.

For grooved-feed extruders feeding pellets (not powder), you can get very close to linear. But not with a smooth bore or powder.

-Bob Cunningham

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