CHICAGO (July 7, 3:45 p.m. EDT) — Negri Bossi USA Inc. is offering a direct-drive, all-electric injection press called Elma with clamping forces of 100-330 tons, then jumping to 935 tons.
The machines have no drive belts or pulleys, even in the 935-ton press, said Liam Burns, general manager.
At NPE 2003 in Chicago, Negri Bossi showed two of the Elma presses, models of 100 tons and 180 tons. The company launched those sizes two years ago at the K 2001 show, later added several other sizes, and then rolled out the big 935-tonner at the Plast Milan 2003 show in Italy last month.
Burns said the Elma machines match Negri Bossi's hydraulic presses in shot size and nozzle contract force. The company also is touting high speed, fast operation, high torque and fast screw rotation.
Each Elma has four servomotors and one standard electric motor. One unusual feature: Two motors tied to a gear mechanism work together to turn the screw and move it forward and back. Burns said the motors switch back and forth from spinning in the same direction to spinning in the opposite direction — so they handle both functions.
Movement of the injection carriage is powered by a regular electric motor.
A cantilever, powered by another servomotor, runs the part ejection.
Burns runs Negri Bossi USA, which the company established in Newark, Del. Negri Bossi SpA is based in Milan, Italy.
In other NPE news, Negri Bossi is introducing wireless remote machine monitoring through its Amico service. Amico gives two-way remote control through a direct link to the control screen on the press, connecting locations outside the plant and the Negri Bossi call center.
Burns said the company's CANbus controls technology allows Negri Bossi to offer the real-time remote monitoring.