Most extrusion operations generate scrap, and in the case of sheet for thermoforming it can exceed 70% of total output. How can you handle all this stuff? Most screw designs can accommodate small amounts of regrind, and small percentages often increase output. The amount of regrind an extruder can handle is a function of the design of the hopper, feed throat, and screw, as well as the characteristics of the regrind itself. Not only does regrind impact output, but it can affect stability.
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