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Liquid in Feed

Modified on Sunday, 01 February 2015 10:40 PM by mpieler Categorized as Extrusion Hints
Liquid in feed
Vol.21 #2, Oct. 1994

When adding large quantities (more than 10% ) of heated liquid additives to the throat, there are several things that can be done to prevent fouling of the screw and interference with the solids (pellet and regrind) feeding:

a) Cool the screw to the end of the solids feed section.
b) Make sure the feed throat cooling is moderate. Too much and moisture condenses on the bore. Too little can cause bridging in the throat.
c) Add shallow grooves to the cast iron surface of the throat to increase COF only.

See also:
  • Feed throat cooling
  • Low viscosity addition
  • Throat cooling

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