Posts: 3
From:india
Registered: Jun 2004

posted June 04, 2004 09:42 AM               

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would like to know the points to look while buying a new extruder for PVC pipe and difference between single screw barell and twin screw barell ? please help me

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Posts: 315
From:McHenry, IL USA
Registered: Nov 2002

posted June 05, 2004 07:01 AM               

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You need to work up a full Definition of Requirements firsthand, and then ask what is needed.

Example:
Pipe Diameter, wall diameter, desired output range, monitoring and auxiliary equipment needed, color(s), and most important, the IV of your pipe compound.

If you get no replys here, then I would suggest you also post your request with plastics.com and spe4.org

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Posts: 3
From:india
Registered: Jun 2004

posted June 08, 2004 01:21 AM               

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thanx for the reply zabielski.

i would like to know what r u upto?

i am new to this plastics field....i read some info about plastics and pvc...i am planning to put up a plant for manufacturing pvc pipes of dia 2" to 5"

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Posts: 315
From:McHenry, IL USA
Registered: Nov 2002

posted June 08, 2004 06:44 AM               

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Contact an Extruder Manufacturer like Davis Standard, and they will tell you what you need exactly.

This is to complex to explain in a forum, as you do indicate that you know nothing much about extrusion.

How much money do you have for such an investment, and where will you put up that Plant?

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Posts: 72
From:Silver City, NM, USA
Registered: Jun 2001

posted June 30, 2004 03:43 PM               

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Without question, over 90% of the PVC pipe worldwide,small and large diameter, is made on twin screw extruders---which are lower shear and more dimensionally accurate than single screw extruders for shear sensitive rigid PVC.
Quality twins--either parallel or conical- are made by Cincinnati Extrusion-Vienna,Cincinnati Milacron-Batavia OH,Krauss-Maffei-Munich,American Maplan-Mcpherson KA.

(I wrote two booklets, "Rigid PVC Extrusion",
and "Optimum Design and Operation of a PVC Extrusion Plant"---which are available at US$50 each, or US$90 for both.If interested,
contact me at: 2beeps@silvercity-nm.com )

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