CHICAGO — Novatec Inc. of Baltimore showed auxiliary equipment at NPE 1997 in Chicago that is designed to handle both the most-delicate and most- demanding resins.
For tough-to-dry resins like polyamides and polyesters, Novatec has introduced a series of nitrogen dryers that allow resins to be subjected to higher temperatures than systems using oxygen-contaminated atmosphere.
By reducing oxygen levels to less than 50 parts per million, the dryers can heat hygroscopic resins to 400° F without the resins degrading. High heat allows the resins to be dried more quickly than at the usual temperature of about 170° F, said James C. Smith, national sales manager.
Another technology, SoftFlow vacuum conveying, is meant for fragile or abrasive resins, Smith said. Using a liquid-ring pneumatic pump, the SoftFlow system moves resins with almost half the air speed of conventional vacuum pumps, and reduces the amount of dusting and damage to conveying surfaces.
To control expanding conveying systems, Novatec also is offering its PC-based Harmony interface. Processors can control, monitor and program operating parameters of their conveying systems of more than 30 stations from a single PC. The program uses Wonder Ware software and includes a menu-driven graphical interface. Other new equipment at NPE includes the NovaBlend 600 on-machine, gravimetric batch blender and AirFlow pneumatic loaders for low-cost, direct-feed conveying.