Milwaukee-based Sterling Inc. introduced volumetric and weigh blenders, and a new temperature controller:
* A volumetric additive feeder's features include a 1/10 horsepower direct-current motor, closed-loop motor control and a low-profile, 6-inch throat with inspection windows. A sample match allows for greater calibration, a swing-out drain cover for easy cleaning, and rugged, easy-to-clean stainless augers with interchangeable inserts made of ultrahigh-molecular-weight polyethyene. The additive feeders come in several models. The SF-2 features two feeders for running two additives at different rates. The SF-M mini-feeder is desiged for small machines and extruders, running 0.5-15 gram per minute with a quarter-inch auger. The heavy-duty SF-200 can run 50-4,000 pounds an hour, and can be used as a starve feeder.
* The SGC series of continuous weigh blenders is designed for continuous blending and feeding during extrusion. It allows continuous metering of two to seven materials, giving a consistent blend that follows the extruder rate by automatically adjusting ingredient feeders to match the extruder rate at the exact ratio required.
* The SFC weigh hopper, used with the SGC blender, eliminates funneling to give accurate material flow. It is mounted on precision load sells to eliminate the weight and vibration of the metering auger and motor assemblies.
* The SGF gravimetric weigh feeder is more accurate than volumetric feeders, Sterling said. It can make fast color changeovers.
* The 2016U hot-oil temperature controller, which is the upright version of Sterling's Royal Series 2016M. The unit is available with pumps up to 5 horsepower, heaters up to 48 kilowatts and optional heat exchangers up to 21 square feet. The new temperature control unit replaces Sterling's model 9016J. To reduce noise, engineers replaced a two-pass heater tank design with a single-pass tank. For added safety, Sterling added a cutout switch to the reservoir tank, which will not allow the unit to run in an extremely low-level condition.
Also new from Sterling: the SPP series dense phase conveyor, as part of its material processing line. The SPP is a low-velocity, pneumatic conveying system designed to move powdered materials — even fine powder — cleanly and efficiently. The conveyor moves large amounts up to 200 feet.
The unit features epoxy-coated mild steel construction with only a few moving parts and requires no lubrication. It operates on low volumes of compressed air.
Tel. (414) 354-0970, fax (414) 354-6421.