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TUNGSTEN Compounding - Best screw & barrel to use?

Author	Topic: TUNGSTEN Compounding - Best screw & barrel to use?
zabielski Senior Member Posts: 58 From:McHenry, IL USA Registered: Nov 2002	posted January 04, 2003 08:58 AM Any idea for the ideal wear resistant screw and barrel finishes to use to minimize wear? IP: Logged
Tom C Moderator Posts: 69 From:Brodheadsville, PA, USA Registered: Jun 2001	posted January 04, 2003 09:58 AM You can minimize wear problems by downstream feeding the tungsten on a W&P type twin screw. Use gear elements for mixing rather than kneading blocks. Feeder selection for the tungsten requires some forethought. If your compounding by adding everything to the throat of a single screw, I would use very hard materials. Xalloy 800 or Wexco 777 for the barrel, Stellite 6 for the screw root, and Colmonoy 83 for the flight tips. If you are just running lab samples, then anything will work for a while. Typical compounds with tungsten have a high % by weight, but a low % by volume. All of that polymer will protect the screw and barrel. Tom C IP: Logged
zabielski Senior Member Posts: 58 From:McHenry, IL USA Registered: Nov 2002	posted January 05, 2003 07:09 AM Thank you Tom C. IP: Logged

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