| 摘要 |
<p>An amt. of increase in driving electric current for the mould-clamping servomotor (12) in the course of change from an appropriate lubrication state to an inappropriate one in the mould-clamping mechanism (10) of an injection moulding machine is predetermined for every combination of the kind of an injection moulding machine, conditions for injection moulding, and kind of grease. Then, while executing a normal injection moulding cycle in an appropriate lubrication state, a standard value of current to drive the motor is determined on the basis of motor driving normal current in a specific position to which a movable platen (14) having performed current measurement for the above-said predetermination is displaced and in increase in motor driving current so that the standard value and the specific position to which the movable platen is displaced are stored in the memory of a numerical control device (50). The control device, in response to grease feeding time judging instruction, drives a grease pump (40) when a detected motor current in the specific displaced position of the movable platen exceeds the standard value. Grease from the grease pump is distributed to each of the plurality of parts of the mould clamper in quantity as required through a distributor (43). @(22pp Dwg.No.0/3).</p> |
