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Topic: screw design

ender
Member

Posts: 2
From:australia
Registered: Feb 2006

posted August 15, 2006 08:52 PM

Hi to all,
Can i just say that i enjoy the information available on this site, this is great place to get answers for extrusion related issues.

My enquiry is for a screw design, i have a 105mm extruder, its used for recycled HD/LD sheet manufacturing and occasionally we produce PP sheets. i would like to get up to aroung 550-600kg p/h. I know this is not enough info, but i can supply other relevant info as you need.

Can some one guide or help with this issue. cheers.............

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Tom C
Moderator

Posts: 745
From:Brodheadsville, PA USA
Registered: Jun 2001

posted August 16, 2006 09:36 AM

A 105MM extruder for this purpose should have 140RPM available with 120kw motor installed. L:D should be about 30:1 .

PE rates would be about 550 kg/hr.
PP Rates 400 kg/hr.

Double those rates are available if a groved extruder is used, but this is a significantly different extruder design.

Very high or low viscosities and melt temperature requirments can dramatically change the above numbers.

How do you compare to these numbers?

------------------
Best Regards,

Tom Cunningham
www.ExtrusionTechnicalServices.com

[This message has been edited by Tom C (edited August 16, 2006).]

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