Nissei America Inc. introduced its NEX-III third-generation all-electric press at NPE2012, demonstrated in-mold labeling by making beer mugs with labels and ran a liquid silicone rubber molding machine.
Anaheim, Calif.-based Nissei said it has improved NEX plasticizing by subdividing and optimizing temperature-control zones in the barrel. The screw is thinner, so heater bands play a more important role, said Nissei America President Isamu Kato.
Another improvement Nissei officials cited is in molding stability, which eliminates the fluctuation of resin temperature that happens when the press is started.
The NEX-III also offers shorter plasticizing time, thanks to a two-zone, controlled rear heater.
At NPE, held April 1-5 in Orlando, Nissei molded parts on two NEX-III all-electrics. An NEX-III press with 88 tons of clamping force molded pipettes using a 32-cavity mold, with a cycle time of 71/2 seconds, as a Yushin robot removed the parts. A 55-ton NEX-III made large paper clips.
The NEX presses showed Nissei's new Tact IV controller with a bigger, 15-inch screen area so users can watch two screens at once without having to toggle back and forth. The operator can change molding parameters while monitoring shot data at the same time.
Meanwhile, Nissei was handing out polypropylene beer mugs — empty ones, since this was NPE, not the K show, after all — that showed an IML system built by DevLinks Ltd., an automation integrator of Fanuc and Wittmann robots in Arlington Heights, Ill. The labels were on a roll, and the laser cut them to shape.
President Robert Devlin said that in a stack system all the labels are the same shape, but laser cutting can change label shapes at any time to whatever pattern the end-user wants.
The system also can do additional printing and custom decorating, or add bar codes or lot information for medical traceability, he said.
“Our goal is to build a flexible IML system for customers already doing pad printing and heat transfer,” Devlin said.
In the Nissei demonstration, the DevLinks system made three label shapes. A top-entry Wittmann robot picked the labels, which were statically charged. The labels were inserted into the two-cavity mold on the fixed mold half, and the robot removed the beer mugs from the moving half.
A 501-ton Nissei FNX press molded the mugs on an 181/2-second cycle. Equipped with a large-volume and high-plasticization injection unit, the hybrid FNX is the successor to the company's AN1 series.
Also in Orlando, Nissei molded polylactic acid cups on a hybrid, 123-ton FNX press, equipped with its N-PLAjet feature.
A 59-ton vertical TNX press with a new turntable molded LSR battery cases on a 50-second cycle.