Elettryka Plastic Metal’s series of electric injection molding machines comes in clamping forces ranging from 55 tons to about 1,100 tons. All machine movements are electrically operated.
What’s new? The incorporation of Moog’s Electrohydrostatic Actuation System (EAS) with the Elettryka 280, making it distinct from other machines in the series. The motion-control package combines electric and electrohydraulic technology and comprises an electrohydrostatic pump unit, servo drive and manifold. The systems supply the pressure and flow of hydraulic fluid, but inhibit the operation of the electric motor during the holding-pressure cycle, when no power is needed; conversely, when power is needed, the system can supply higher torque, reaching the same performance of traditional systems. The Elettryka 280 uses the electrohydrostatic technology for the actuation of the injection axis. The EAS package will eventually be available on other Plastic Metal machines and could be supplied as a retrofit for other injection molding machines.
Benefits Energy-efficient operation, increased productivity and a reduced machine footprint, maintenance costs and total cost of ownership. The package allows an injection molding machine to modulate power use based on a given load, rather than running continuously at the same power level. The EAS also helps prevent pressure-holding interruptions or pressure peaks that could damage parts as they’re being made and lead to waste. With the system, molders can hold their processes to much tighter tolerances.
Moog, East Aurora, N.Y., 716-687-4954, www.moog.com
Plastic Metal USA, Huntington Bay, N.Y., 914-582-1848, www.npmspa.com
Vital Statistics for Elettryka 280
| Clamping force | 309 tons |
| Screw diameter | 55mm |
L:D ratio | 27:1 |
| Opening stroke | 23.6 inches |
