At NPE 2006, Negri Bossi USA Inc. featured its new all-electric injection press, the Canbel, and - in a trade show first for Negri Bossi - the firm molded liquid silicone rubber parts on an all-electric machine.
Negri-Bossi also showed a multimaterial press called the CanBiMat, molding a two-shot polycarbonate goblet.
The Canbel series resulted from the company's experience with the all-electric, direct-drive Elma line and the Vector series, a hybrid press with electric screw drive.
Negri Bossi officials are pitching the energy savings of the direct-drive Canbel - up to 75 percent less usage compared with conventional hydraulic machines.
Canbel machines come in clamping forces from 60-935 tons and injection units with shot sizes as large as 165 ounces.
Also, the screw rotation torque was increased by 30-40 percent over hydraulic machines, and 100 percent over belt-driven all-electrics, according to the company. Other features include water-cooled motors and an optional hydraulic mold-core control.
Canbel presses also capture energy used while decelerating the motor, which provides an additional energy savings of 2.7 percent.
At NPE, held June 19-23 in Chicago, a 500-ton Canbel molded a nylon Buick hubcap. The press was equipped with a Tecnomagnete mold clamping system.
In the LSR application, a 77-ton Canbel ran an eight-cavity mold to make syringe seals, in four different designs, using sequential valve gating.
The cycle time was 35 seconds. A melt pressure transducer was controlling injection pressure.
Negri Bossi USA is based in Newark, Del. Its parent company, Negri Bossi SpA, is from Milan, Italy.
A few days after NPE 2006, Youngstown, Ohio-based Spirex Corp. announced a global agreement to supply Negri Bossi with screws, barrels and nonreturn valves. The deal was signed in Milan.