An energy-saving, high-speed infrared resin dryer, originally designed for high-volume processing will soon be available in a version for smaller throughputs. The new Basic Infrared Rotary Drum (B-IRD) system for injection molders was shown at the International Plastics Fair (IPF) in Tokyo last fall by Sojitz Machinery Corp., Osaka, Japan. Resin passes through a slowly rotating drum, which contains infrared (IR) heat lamps and a stream of ambient air to carry off the moisture emitted. It reportedly provides energy savings from 20% to 65% while reducing resin drying times from hours to minutes. For example, Sojitz claims that ABS with 0.25% moisture content can be dried to less than 0.1% in 3 min, compared with 3 hr in conventional drying systems. The compact unit processes 22 to 110 lb/hr. Novatec, Inc., Baltimore, is licensed to use the same patented technology as Sojitz, with which it has a working relationship. Novatec introduced IRD crystallizer/dryer models in 2006 with throughputs of 400 to 4000 lb/hr, intended mainly for PET regrind. Novatec plans to introduce an expanded line at NPE 2009 in Chicago this June. It will include smaller models, though of a design somewhat different from Sojitz’s. (410) 789-4811 • www.novatec.com
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Editor PickThe Primary Importance of Secondary Equipment
Resin drying, resin conveying and process heating and cooling are as vital to the injection molding process as the press and tool, and they get their due at Molding 2017.