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Gear box optimization

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Topic: Gear box optimization

Prakash
Member

Posts: 1
From:India
Registered: Apr 2004

posted April 01, 2004 08:26 AM

I would like to know how do I calculate the torque required for a single screw extruder, so that I can optimize my gear box and motor drive design. Thank you.

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Tom C
Moderator

Posts: 313
From:Brodheadsville, PA USA
Registered: Jun 2001

posted April 01, 2004 11:44 AM

Prakash,

While this question is a little too general there are some figures that may help you.

A typical single screw extruder is geared to deliver 125RPM maximum.

A worse case number to determine the HP to install is 7 lbs/hr/HP. In other words if you wanted to make 700 lbs/hr, you should install 100HP. This is not to say that you can install 100HP on a 2 1/2" extruder and get 700 lbs/hr normally.

See the previous postings regarding screw output calculations and screw torque calculations.

You should be able to make some rough calculations.

Tom C
www.ExtrusionTech.com

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