Sujeccion magnetic device and method for detecting and controlling an operating state of a magnetic sujeccion.

摘要

Magnetic clamping system for a workpiece (12) or for a mold of a molding machine injection, comprising a magnet device (16) having a clamping surface for engaging said workpiece or mold at a clamping interface; a plurality of reversible magnets (52) on said magnet device (16) for establishing a magnetic clamping force at said clamping interface, said magnets including (52) having a coil element (56); a sensor permeability system (28) operatively associated with at least one of said magnets (52) and including first means in the form of a search coil (40) for determining total changes in magnetic flux at said interface clamp desimantada between a condition and a magnetized condition of said magnet device (16) and generating a first warning signal if a threshold value is not reached; control means (30) for receiving said first warning signal and to determine at least about a clamping force exerted on the workpiece to be clamped, characterized by also comprising a sensor system (27) of movement workpiece or mold operatively associated with at least one of said magnets (52) and including second means for determining changes in magnetic flux conditions at said interface clamp and generating a second warning signal if exceeded one threshold value; and control means (30) for receiving said second warning signal and detecting motion conditions between the workpiece or the mold and the clamping system.