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3/30/2018

Injection Molding: Injection Machine Configured for In-Line Compounding

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In-line compounding option for Wilminton Machinery’s MP800 800-ton, medium-pressure injection press can handle up to six components.

As reported in our feature previewing injection molding news at NPE2018, Wilmington Machinery, Wilmington, N.C., will show its recently developed Lumina MP800 medium-pressure injection press. This 800-ton unit with two-stage (screw/plunger) injection has an electric screw drive and energy-saving hydraulics with variable-frequency drive (VFD).

This press has a 6-in. extruder with throughput up to 2000 lb/hr. Additional information from the machine builder announces a new in-line compounding option whereby the fixed extruder would be equipped with a single screw of at least 30:1 L/D with dual mixing sections. It would be flood-fed with a mix of preblended materials to be homogenized in the extruder. The company claims uniform mixing of up to six components, thanks to the screw technology developed in the company’s lab over the past year.

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