| 摘要 |
PURPOSE:To enhance working efficiency by enabling the operation of a mixing jig even when a particulate material is weighed, by reducing the operation speed of a particulate material mixing jig before the supply amount of the particulate material reaches a required supply amount from the point of time when said supply amount reached to the predetermined ratio with respect to the required supply amount. CONSTITUTION:Particulate materials (a), (b) in storage tanks 1, 2 are alternately supplied to a weighting tank 7 through screw feeders 5, 6 and a distributor 8. A ribbon screw 11 is operated at a high speed at the beginning of the supply of the particulate materials (a), (b) to mix said particulate (a), (b). When the wt. signal from a load cell 10 reaches the predetermined ratio with respect to the required supply amounts of the particulate materials (a), (b), a control apparatus 17 reduces the operation speed of the ribbon screw 11. Whereupon, the variation of the wt. signal of the load cell 10 accompanied by mixing action becomes small, the supply amounts of the particulate materials (a), (b) can be detected with good accuracy. Because mixing operation can be performed even during weighing, working efficiency is enhanced.
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