adiabatic extrusion

adiabatic extrusion

[¦ad·ē·ə¦bad·ik ik′strü·zhən]
(engineering)
Forming plastic objects by energy produced by driving the plastic mass through an extruder without heat flow.
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The term adiabatic extrusion was very popular in the '60s and '70s, but has seemingly disappeared from the processing terminology of today.
Try starting your extruder with your normal profile; and then once it is relatively stable, tune your zones for adiabatic extrusion. Zones calling for heat frequently should be gradually lowered, and zones calling for cooling frequently should be gradually raised.
(13,14) used a simple energy balance to derive the analytical solution of Newtonian fluids under isothermal and adiabatic extrusion. Rotem and Shinnar (15) obtained numerical solutions for one-dimensional isothermal power-law fluids in a rectangular channel.
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