A new extruder feed section allows conversion from a grooved to smooth bore in three to five hours, says Macro Engineering & Technology Inc., Mississauga, Ont.

A new extruder feed section allows conversion from a grooved to smooth bore in three to five hours, says Macro Engineering & Technology Inc., Mississauga, Ont. Macro will show its Exxfeed modular feed sections for the first time at NPE in Chicago next month. Exfeed is available for Macro's MacroPlast single-screw extruders in 1.75- to 4-in. diam. A 2.5-in. model with Exxfeed section is available for trials in Macro's lab. Smooth and grooved versions use the same water cooling with automatic temperature control. Macro says grooved feed sections raise throughput and run at lower melt temperatures than a smooth bore of the same size. The grooved Exxfeed throat reportedly can process even VLDPE and mLLDPE at up to 50% higher outputs than a smooth bore. According to Macro, a smooth throat is required to feed non-free-flowing materials like powdered resins, sticky elastomers, film fluff, and other regrind.

Macro Engineering & Technology
Inc.
199 Traders Blvd. East Mississauga, L4Z 2E5, Ontario, Canada
Phone (905) 507-9000 Fax (905) 507-3000