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3/31/2015 | 1 MINUTE READ

INJECTION MOLDING: Coinjection, LSR/TP Overmolding & New Two-Platen Presses at NPE

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Milacron pulled out the stops at the largest booth in the show.

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Several new injection machines and interesting technology demonstrations were shown last month at NPE2015 by Milacron LLC, Batavia Ohio. Coinjection was the theme of two exhibits. One involved production of barrier cans of PP/EVOH/PP (photo) on a Ferromatik 280 press utilizing Kortec (now Milacron Co-Injection) technology. This Klear Kan system molds a barrier layer less than 1-mil thick that covers more than 99% of the part and can be controlled precisely in up to 96 cavities, Milacron claims. The can is retortable at up 130 C. At the show Milacron molded Klear Kans in four cavities in less than 8 sec.

In a second coinjection cell, a new Ferromatik 580 press molded 5-gal pails with 50% PCR (post-consumer recycle) in the center in under 15 sec. The new machine comes in nine sizes from 120 to 650 metric tons and is preconfigured for multicomponent, mono-sandwich, cube, and coinjection capabilities. Electric, hydraulic, and hybrid drive options are available.

Another multicomponent demonstration utilized a Fanuc Roboshot 150 overmolding LSR onto nylon to produce an automotive diaphragm. The system employed a new version of the E-Multi auxiliary injection unit designed for LSR with a special screw and barrel and ability to provide 22,000 psi injection pressure at 180 mm/sec injection speed. The mold from Roembke was mounted on a Varian turntable.

Meanwhile, a new press line, the Maxima Performance series, is a further development of the Maxima hydraulic two-platen platform. The new version (450 to 1000 m.t.) delivers 33% faster dry cycles, 70% lower energy consumption, the widest platens available in each tonnage range, and a precision greaseless clamp guided on linear bearings. Control of auxiliary equipment is integrated into the new Mosaic+ machine controller, which will become the global standard on Milacron presses. Built on the previous Mosaic platform, it offers new features and options, fewer buttons, more intuitive user interface (21-in. touchscreen), and increased programming flexibility. Users can see auxiliary screens, such as mold-temperature control, at the same time as the primary control screen.

Milacron also demonstrated the ability to combine light weight with Class A surface by using MuCell foam technology from Trexel together with variotherm heat/cool alternating temperature control on a Magna T servo press.

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