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additional drying at any point, dry air is introduced into the loop automatically, and then bypassed again automatically when the desired dryness is achieved. Each resin can have a recipe that ensures proper resin moisture always. Absolute Haitian Corporation 94 Gardner St. • Worcester, MA 01610 • 508-459-5372 12900 Plaza Dr. • Parma, OH 44130 • 216-452-1000 www.absolutehaitian.com Welcome to the market leader in injection molding machines. Visit our booth W143 at NPE 2018 to see our latest technology: • Introduction of the JE Series two-platen electric hybrid molding machine • New developments in all-electric technology for the Venus Series • New advancements for the best-selling Mars Series – now at more than 180,000 installed machines and counting! • Cost-efficient large-tonnage electric Zeres Series • Integrated control of automation, auxiliaries, peripherals and process quality monitoring through communications networks If you are looking for balance in flexibility and productivity, visit us at NPE 2018 to see affordable technology in action. FLEXIBILITY WITH TECHNOLOGY TO THE POINT. Booth # W143 www.npeguestpass.org/47300 Moisture Manager uses valves in the dryer and a dewpoint measurement out of the drying hopper to determine if moisture is being pulled from the resin or if the material is already dried to the appropriate moisture level. If the resin is already dry, the blower loop will exclude the desiccant and recirculate and heat without using -40 F/C dewpoint air. This is significantly different from running the dryer at a fixed dewpoint other than -40 F/C, where operators must first determine that they need to start the dewpoint change and then figure out— mostly through trial and error—what change is required. In doing this manually, operators will wind up making many bad parts first and then experiment on what they need to do to correct the issue. Moisture Manager does this automatically. As for OverDry Protection, once this feature is turned on, the dryer will automatically adjust the drying setpoint parameters to maintain the correct drying temperature based on an algorithm in the control program. Once the operator inputs the desired drying temperature, the dryer control takes it from there, determining the appropriate hopper exit temperature at which the drying temperature should be reduced, and find automatically the temperature that gives the proper temperature profile in the hopper. No further intervention is necessary, and the dryer will automatically adjust and maintain the temperatures to have a consistent drying-temperature profile. OverDry Protection is an automated control process that takes the guesswork and human intervention out of the process. Dewpoint Dewpoint -10 to 0 F Dewpoint The source of drying air is changed from central dryer to return air outlet with the blowers at each hopper Option of using either return or process air -40 F Dewpoint 20 FEBRUARY 2018 Plastics Technology PTonline.com D R Y I N G Close -Up On Technolog y