Patent attributes
An apparatus for regulating an injection moulding machine comprising a crank lever mechanism for moving the movable mould mounting plate, wherein the crosshead of the crank lever mechanism is driven by a drive device. The regulating apparatus is constructed as a cascade regulator, wherein the follower regulating circuit (inner regulating circuit (11)) is a force regulator which compares a force reference value (FHref) supplied by a guide regulating circuit to a force actual value (FH) detected by a force measuring device (14) at the drive device (5, 6) and outputs a control parameter or parameters to the drive device (5, 6), and wherein the guide regulating circuit (outer regulating circuit (9)) is a trajectory follower regulator which in dependence on a stored or generated reference trajectory (xC,ref,{dot over (x)}C,ref,{umlaut over (x)}C,ref) for the crosshead ascertains and outputs on the one hand a travel and/or speed actual value (xC,{dot over (x)}C) detected by a travel measuring device (12) at the crosshead (4) and on the other hand the force reference value (FH,ref) for the follower regulating circuit.
