AArburg has added the Allrounder 520A, a 160-ton model, to its Alldrive series of electric machines. It joins the Allrounder 420A, which is available with either an 80- or 100-ton clamp. The design of the Alldrive machine includes electric servomotors as standard for mold opening and closing, injection, and dosing functions. Secondary functions such as ejection, nozzle movement, and mold action can be either electromechanical or hydraulic, depending on the application and the mold design. Ejection, for example, can be done with the precise and dynamic force of an electrically driven spindle, or with the relatively softer motion of a hydraulic cylinder. Arburg notes that this also means existing molds with hydraulic operations need not be redesigned.
For this machine, Arburg developed a special energy-saving, small-accumulator hydraulic system that can be assembled and dismantled easily. The high precision of the main drive movements ensures high positioning accuracy for mold and ejection movements. The Allrounder 520A comes with a choice of two injection units, each having a further choice of three screw diameters. The machine is managed using Arburg?s Selogica control system, which provides icon control of simultaneous operations.
Arburg Inc., Newington, CT
(860) 667-6500; www.arburg.com