Means for automatic control of batching when casting from a heat-retaining of casting furnace or ladle (crucible)

Claim 1

Means for automatic control of batching when casting from a crucible including a batching ladle, means for tapping the crucible in batches into the batching ladle, means for weighing the batching ladle, a deriving device, means for feeding the output signal of the batching ladle weighing means to the deriving device, means in the deriving device to transform the output signal of the batching ladle weighing means, which output signal depends upon the weight of batches of the tapped melt, into the derivative of the output signal of the batching ladle weighing means, the derivative of the output signal of the weighing means representing the rate of the melt flow out of the crucible, a reference device providing signals representing the desired value of melt flow rate out of the crucible, means responsive to the output signal of the batching ladle weighing means to change the output signal of the reference device, a comparison device, means to feed to the comparison device the signal from the reference device and the output signal from the deriving means, a control device for the tapping of the crucible, and means to feed to the control device output signals from the comparison device to control the tapping rate to maintain it at different values in response to differences in the weight of the batching ladle.