JP5866705B2 - Metering and blending apparatus and metering and blending method - Google Patents

Description

  The present invention relates to a metering and blending apparatus and a metering and blending method that meter and blend a plurality of types of raw materials at a certain blending ratio and provide them to the next step.

  2. Description of the Related Art Conventionally, a plurality of types of raw material metering and blending apparatuses include ones that individually weigh each raw material in accordance with the blending ratio, and mix these after completing the metering (for example, Patent Document 1 ( Refer to FIG.

JP-A-6-26915

  In this type of metering, it is important not to cause a metering error when metering each raw material. Ingredients that are generated with incorrect weighing will cause the blending ratio of multiple kinds of ingredients to go wrong, and the product will deteriorate in quality, so such ingredients are often discarded. It is a loss. When the raw material loss increases, particularly expensive raw materials are not preferable because the economic loss causes an increase in product cost.

  The present invention has been made in view of the above points, and in the case where a plurality of types of raw materials are metered and blended so as to have a constant blending ratio, raw material loss due to erroneous weighing is made as much as possible. The purpose is to reduce.

  In order to achieve the above object, the present invention is configured as follows.

(1) The weighing and blending apparatus of the present invention includes a plurality of raw material supply means for supplying each of a plurality of types of raw materials, a weighing means for weighing each raw material, a discharge means for discharging the measured raw materials, and the weighing means Control of the supply of each raw material by the raw material supply means so as to satisfy a certain blending ratio based on the measured value, and a control means for controlling the discharge of the raw material by the discharge means,
The control means, as a control mode, has a normal mode and at least one correction mode for correcting so as to satisfy the certain blending ratio when an erroneous weighing occurs,
In the normal mode, with the basic blending weight blended with the plurality of types of raw materials, the feed of each raw material is controlled by the raw material feeding means so as to satisfy the certain blending ratio, and all the raw materials are weighed, When a certain blending ratio is satisfied, the discharging means discharges the blended raw material, while when erroneous weighing occurs and the certain blending ratio is not satisfied, the discharging means prohibits the discharge of the blending raw material, and Move to correction mode,
In the correction mode, the raw material supply means additionally supplies raw materials by the raw material supply means so as to satisfy the certain blending ratio with a blending weight larger than the basic blending weight, and satisfies the certain blending ratio. the time was, with discharging the mixed material by said discharge means, which returns to the normal mode,
The large blending weight is not more than the rated weight of the measuring means and is a predetermined proportion of the weight relative to the rated weight .

  It is sufficient that at least one correction mode for correcting so as to satisfy a certain blending ratio when erroneous weighing occurs, and a plurality of correction modes may be provided.

  The blending weight refers to the weight of the blending raw material in which plural kinds of raw materials are blended, and the blending weight in the normal mode is referred to as a basic blending weight.

  The raw material to be additionally supplied in the correction mode does not necessarily need to be all types of raw material, and may be any type of raw material necessary for satisfying the above-described fixed blending ratio.

  According to the metering and blending apparatus of the present invention, when erroneous weighing does not occur, the cycle of the normal mode of discharging the blended raw materials weighed so as to satisfy a certain blending ratio with the basic blending weight is repeated, while erroneous metering is performed. When the constant blending ratio is not satisfied and the blending raw material is not satisfied, the process proceeds to the correction mode without discharging the blending raw material. In the correction mode, the constant blending ratio is set to a larger blending weight than the basic blending weight. By supplying additional raw materials so that they are satisfied, the erroneous weighing that occurs is corrected, so even if erroneous weighing occurs in the normal mode, it is constant by adding the raw material in the correction mode without discarding the blended raw materials. It can correct | amend so that the mixture ratio of this may be satisfy | filled. This eliminates the need to discard the blended raw material even if erroneous weighing occurs, thereby reducing the raw material loss.

(2) In another embodiment of the weighing and blending apparatus of the present invention, the correction mode is set to the first correction mode, the raw material is additionally supplied in the first correction mode, the raw material is measured, and erroneous weighing occurs. When the predetermined blending ratio is not satisfied, the discharge of the blended raw material by the discharge means is prohibited, and the process proceeds to the second correction mode,
In the second correction mode, the raw material supply means additionally supplies raw materials to measure the raw materials so as to satisfy the predetermined mixing ratio with a larger mixing weight than the large mixing weight, and the constant mixing When the ratio is satisfied, the blending raw material is discharged by the discharge means and the normal mode is restored.

  According to this embodiment, when erroneous weighing occurs in the first correction mode and the predetermined blending ratio is not satisfied, the process proceeds to the second correction mode without discharging the blended raw material, and the blending weight is further increased. Since the raw materials are additionally supplied so as to satisfy the above-mentioned fixed blending ratio and the generated erroneous weighing is corrected, even if erroneous weighing occurs in the normal mode and the first correction mode, these mixed raw materials are not discarded. By adding raw materials in the second correction mode, it can be corrected to meet a certain blending ratio, which eliminates the need to discard the blended raw materials even if incorrect weighing occurs, reducing raw material loss can do.

  Similar to the second correction mode, a third correction mode may be added, or fourth, fifth, etc. correction modes may be added.

 (3) In the embodiment of (2), the raw material is additionally supplied in the first correction mode or the second correction mode, the raw material is weighed, and an erroneous weighing occurs to satisfy the certain blending ratio. When there is not, the shift to the manual mode is performed without shifting to the next correction mode, and the additional supply of the raw material by the supply means is controlled manually so as to satisfy the predetermined blending ratio.

  According to this embodiment, when erroneous weighing occurs in the first correction mode or the second correction mode and a certain blending ratio is not satisfied, the material is not manually shifted to the next correction mode but manually. Since additional supply is performed, it is possible to reliably obtain a blended raw material having a certain blend ratio.

(4) In another embodiment of the weighing and blending apparatus of the present invention, the weighing means is supplied with the plurality of types of raw materials, and the weight of the predetermined ratio with respect to the rated weight is set as the weight of the first predetermined ratio. The basic blending weight is a second predetermined ratio of weight with respect to the rated weight.

According to this embodiment, mixing weight basic is the weight of a plurality of kinds of raw material supplied to the weighing means in the normal mode, Ri weight der second predetermined percentage of the nominal weight of the metering means, said in the correction mode The blending weight that is larger than the basic blending weight is less than the rated weight . Therefore , even if erroneous weighing occurs in the normal mode and the raw material is additionally supplied to the weighing means in the correction mode, it is within the rated weight of the weighing means. It becomes possible.

(5) The metering and blending method of the present invention is a metering and blending method in which a plurality of types of raw materials are respectively weighed and blended so as to satisfy a certain blending ratio, and includes a normal mode and a correction mode.
In the normal mode, all raw materials are weighed by controlling the supply of each raw material so that a certain blending ratio is satisfied at the basic blending weight. When the certain blending ratio is met, On the other hand, when an erroneous measurement occurs and the predetermined blending ratio is not satisfied, the metered blending raw material is prohibited from being discharged, and the process proceeds to the correction mode.
In the correction mode, the raw material is additionally supplied to measure the raw material so as to satisfy the certain blending ratio with the blending weight larger than the basic blending weight, and when the certain blending ratio is satisfied, the metering is performed. While discharging the blended raw material, it is to return to the normal mode,
The large blending weight is equal to or less than the rated weight of the weighing means for weighing the plurality of types of raw materials, and is a predetermined proportion of the weight relative to the rated weight .

  According to the metering and blending method of the present invention, when erroneous weighing does not occur, the cycle of the normal mode of discharging the blended raw materials weighed so as to satisfy a certain blending ratio with the basic blending weight is repeated, while the wrong metering is performed. When the constant blending ratio is not satisfied and the blending raw material is not satisfied, the process proceeds to the correction mode without discharging the blending raw material. In the correction mode, the constant blending ratio is set to a larger blending weight than the basic blending weight. By supplying additional raw materials so that they are satisfied, the erroneous weighing that occurs is corrected, so even if erroneous weighing occurs in the normal mode, it is constant by adding the raw material in the correction mode without discarding the blended raw materials. It can correct | amend so that the mixture ratio of this may be satisfy | filled. This eliminates the need to discard the blended raw material even if erroneous weighing occurs, thereby reducing the raw material loss.

  According to the present invention, when no erroneous weighing occurs, the cycle of the normal mode of discharging the blended raw materials weighed so as to satisfy a certain blending ratio at the basic blending weight is repeated, while the certain metering occurs and the constant metering occurs. If the blending ratio is not satisfied, the process shifts to the correction mode without discharging the blended raw materials, and an error is caused by additionally supplying the raw materials to satisfy the above-mentioned fixed blending ratio with a blending weight larger than the basic blending weight. Since the weighing is corrected, even if erroneous weighing occurs in the normal mode, it is not necessary to discard the blended raw material, and the raw material loss can be reduced.

FIG. 1 is a schematic diagram showing a schematic configuration of a metering and blending apparatus according to an embodiment of the present invention in a glass production facility. FIG. 2 is a diagram for explaining transition states of operations in the normal mode, the first correction mode, and the second correction mode in the weighing and blending apparatus of FIG. FIG. 3 is a flowchart for explaining the operation of the weighing and blending apparatus of FIG. FIG. 4 is a schematic diagram showing a schematic configuration of a weighing and blending apparatus according to another embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram showing a schematic configuration of a metering and blending apparatus according to one embodiment of the present invention in a glass manufacturing facility. Here, four types of glass materials A, B, C, and D are handled as a plurality of types of materials. It should be noted that the number of types of raw materials is not limited to four, but can be widely applied to any number of types. Moreover, about a raw material, it is not limited to a glass raw material, It can apply to arbitrary raw materials widely. Further, the blending ratios a: b: c: d of the raw materials A, B, C, and D are not limited to 1: 2: 3: 4 in the following examples, but widely in any arbitrary blending ratio. It can be applied to.

  In FIG. 1, 1a, 1b, 1c, and 1d are raw material tanks for raw materials A, B, C, and D, and 2a, 2b, 2c, and 2d are raw material tanks 1a, 1b, 1c, and 1d, respectively. A feeder for supplying D to a common weighing hopper 3, 3 is a measuring hopper for mixing and containing raw materials A, B, C, D discharged from the feeders 2a, 2b, 2c, 2d in common Reference numeral 4 denotes a discharge gate that opens and closes the discharge port at the lower end of the weighing hopper 3, 5 denotes a gate opening / closing cylinder that drives the opening and closing of the discharge gate 4, and 6 supports the weighing hopper 3 at a plurality of circumferential locations, for example, three locations. A load cell 7 for measuring the weight of the weighing hopper 3 is a controller as control means.

  The raw material tanks 1a, 1b, 1c, 1d and the feeders 2a, 2b, 2c, 2d constitute a plurality of supply means for supplying the raw materials A, B, C, D, respectively, and the weighing hopper 3 and the load cell 6 The weighing means for weighing each of the supplied raw materials A, B, C, and D is configured, and the discharge gate 4 and the gate opening / closing cylinder 5 constitute the discharge means for discharging the measured mixed raw material.

  In FIG. 1, 8 is a mixing tank disposed immediately below the discharge gate 4 of the weighing hopper 3, 9 is a bellows connecting the weighing hopper 3 and the mixing tank 8, and 10 is a stirring blade (blender) built in the mixing tank 8, 11 is a reduction gear mechanism, 12 is a stirring motor, 13 is a discharge screw feeder, 14 is a storage tank, 15 is a chute, 16 is a belt conveyor, 17 is a drive motor, 18 is a chute, 19 is a melting furnace, 20 is for molding Equipment.

  The controller 7 is provided with operation switches, numeric keys, a display device, and the like. A load cell 6 and others are connected to the signal input section of the controller 7, and feeders 2a, 2b, 2c and 2d, a gate opening / closing cylinder 5, a stirring motor 12, a discharge screw feeder 13 and others are connected to the signal output section. ing. The controller 7 receives level detection signals from the upper limit and lower limit level sensors 30a and 30b that detect the level of the blended raw material in the storage tank 14, respectively. When the level of the blended raw material in the storage tank 14 reaches the lower limit level, the controller 7 performs the metered blending of the raw materials A, B, C, and D by the metering and blending apparatus to supply the blended raw material. When the level of the blended raw material reaches the upper limit level, the metering blending of the raw materials A, B, C, D by the metering blending device is stopped, thereby controlling the level of the blended raw material in the storage tank 14 within a certain range. ing.

  Next, the operation of the weighing and blending apparatus of the present embodiment configured as described above will be described. Here, the operation in the normal mode will be described. As long as no erroneous weighing occurs, the metering in the normal mode is repeated.

  In the controller 7, basic measurement target values [Wma, Wmb, Wmc, Wmd] are set in advance for each of the raw materials A, B, C, and D. The gate opening / closing cylinder 5 is driven to be extended under the control of the controller 7, and the discharge gate 4 connected to the gate opening / closing cylinder 5 closes the opening at the lower end of the weighing hopper 3. In this state, the first feeder 2a is first driven by the control of the controller 7, and the raw material A stored in the first raw material tank 1a is supplied to the weighing hopper 3. The load of the weighing hopper 3 to which the raw material A is supplied is detected by the load cell 6, and the load signal is given to the controller 7. Based on the load signal, the controller 7 stops the driving of the first feeder 2a so that the actual measurement value Wa of the raw material A becomes the measurement target value Wma.

  Next, the controller 7 starts driving the second feeder 2b. Thereby, the raw material B accommodated in the 2nd raw material tank 1b is supplied to the measurement hopper 3 like the above, and the load signal of the load cell 6 is given to the controller 7. The controller 7 stops driving the second feeder 2b so that the actual measurement value Wb of the raw material B obtained from the load signal becomes the measurement target value Wmb. Since the load signal output from the load cell 6 is a signal relating to the accumulated weight in the weighing hopper 3, the measured actual value Wb of the raw material B is determined from the measured actual measured value (Wa + Wb) of the measured raw material A. It is a value obtained by subtracting Wa.

  Next, the controller 7 starts driving the third feeder 2c. As a result, in the same manner as described above, the raw material C stored in the third raw material tank 1c is supplied to the weighing hopper 3, and the controller 7 determines that the measured actual value Wc of the raw material C obtained from the load signal is measured. The drive of the 3rd feeder 2c is stopped so that it may become the target value Wmc.

  Next, the controller 7 starts driving the fourth feeder 2d. Thereby, in the same manner as described above, the raw material D accommodated in the fourth raw material tank 1d is supplied to the weighing hopper 3, and the controller 7 determines that the measured actual value Wd of the raw material D obtained from the load signal is measured. The drive of the 4th feeder 2d is stopped so that it may become the target value Wmd.

  When one metering and blending cycle of the four kinds of raw materials A, B, C, and D at a constant blending ratio is completed and no erroneous weighing occurs, the controller 7 drives the gate opening / closing cylinder 5 to discharge the gate. 4 is opened, and the weighed raw material (mixed raw material) is discharged to the lower mixing tank 8.

  Next, the controller 7 drives the stirring motor 12 to rotate the stirring blade 10 and drives the discharge screw feeder 13. Thus, the blended raw material is conveyed to the storage tank 14 by the discharge screw feeder 13 while being substantially uniformly stirred and mixed by the stirring blade 10.

  By driving the drive motor 17, the blended raw material in the storage tank 14 is always supplied onto the belt conveyor 16 via the chute 15 and further carried into the melting furnace 19 from the chute 18. In the melting furnace 19, the blended raw material is melted and sent to the molding equipment 20.

  The belt conveyor 16 may be supplied with raw materials from other raw material supply facilities 21 and 22, mixed on the belt conveyor 16, and carried into the melting furnace 19.

  Next, a description will be given of a correction mode for correcting an erroneous weighing when an erroneous weighing occurs in the normal mode. In this embodiment, the correction mode has two correction modes, a first correction mode and a second correction mode.

  In the weighing hopper 3, the raw materials A, B, C, and D that are sequentially supplied are layered from bottom to top. The state shown in the figure is the end state of the normal mode in which the raw materials A, B, C, and D are supplied once. However, if erroneous weighing occurs in the first normal mode, the first raw materials A, B, and C are shown. , D is the first correction mode in which the second raw materials A, B, C, D are additionally supplied sequentially. Furthermore, if an erroneous weighing occurs in the first correction mode of the second time, the third raw material A, B, C, D is sequentially added on top of the first and second raw materials A, B, C, D. The second correction mode to be supplied is set.

  If no erroneous weighing occurs in the first normal mode, the raw material for one batch is discharged from the weighing hopper 3 to the mixing tank 8. Then, the metering blending in the normal mode similar to the first time is repeated.

  Further, when an erroneous weighing occurs in the first normal mode, the process proceeds to the first correction mode, which is the second additional metering combination as described above. If no erroneous weighing occurs in the first correction mode, the blended raw materials for the first and second times are discharged from the weighing hopper 3 to the mixing tank 8. And it returns to the metering | mixing mixing | blending in the 1st normal mode.

  Further, when an erroneous weighing occurs even in the second first correction mode, the process proceeds to the second correction mode which is the third additional metering combination as described above. If no erroneous weighing occurs in the second correction mode, the blended raw materials for the first, second, and third times are discharged from the weighing hopper 3 to the mixing tank 8. And it returns to the metering | mixing mixing | blending in the 1st normal mode.

  Further, when an erroneous weighing occurs in the second correction mode for the third time, the operation is temporarily stopped and the mode is switched to the manual mode as will be described later.

  The rated weight (rated load) corresponding to the maximum weighing capacity of the weighing hopper 3 and the load cell 6 is the weight of the blended raw material for the first, second, and third times. As an example of the rated weight, for example, 100 kg. Then, the blending weight of the blended raw material for one batch is set to 80 kg of 80% of the rated weight of 100 kg, for example. In addition, the blending weight of the blended raw materials for the first and second batches is set to 100 kg of the rated weight of 100 kg, for example, 90 kg of 90%. In this case, the weighing with the blending weight of 80 kg (80%) is the above-described normal mode, and the additional weighing with the blending weight of 90 kg (90%) is the above-mentioned first correction mode, and the blending weight of 100 kg (100 %) Is the second correction mode described above.

  That is, 80% is the ratio of the blended weight to the rated weight in the normal mode. 90% is the ratio of the blended weight to the rated weight in the first correction mode. 100% is the ratio of the blended weight to the rated weight in the second correction mode.

  The ratio of the blended weight with respect to the rated weight is only an example, and it is needless to say that other ratios may be used. Since the basic blending weight in the normal mode is a blending weight that is repeatedly weighed in a normal state where no erroneous weighing occurs, the weight is close to the rated weight so that the supply of the blending raw material to the melting furnace 19 on the downstream side is not interrupted. The blending weight in the correction mode is preferably a weight that can correct the weighing error by adding the raw material.

  FIG. 2 is a diagram for explaining the transition of the operation of the weighing and blending apparatus through the normal mode, the first correction mode, and the second correction mode.

  The raw materials to be blended are four types A, B, C, and D as described above. In addition, a constant blending ratio a: b: c: d of the raw materials A, B, C, and D is set to 1: 2: 3: 4. The rated weight of the weighing hopper 3 and the load cell 6 is 100 kg. When a constant blending ratio of 1: 2: 3: 4 is applied to the rated weight of 100 kg, [10 kg, 20 kg, 30 kg, 40 kg] is obtained. This is described in the column “Weighing” in FIG.

  The basic blending weight in the normal mode is 80% of the rated weight, the blending weight in the first correction mode after the occurrence of erroneous weighing is 90% of the rated weight, and the blending weight in the second correction mode is 100% of the rated weight. %.

  That is, in the normal mode, the measurement target value H1 of each of the raw materials A, B, C, and D is [8 kg, 16 kg, 24 kg, 32 kg] so as to satisfy a certain mixing ratio at the basic mixing weight of 80 kg.

  In the first correction mode, the basic setting value H2 is [9 kg, 18 kg, 27 kg, 36 kg] so as to satisfy a constant mixing ratio at a mixing weight of 90 kg. In the second correction mode, the basic setting value H2 is constant at a mixing weight of 100 kg. The basic set value H3 is [10 kg, 20 kg, 30 kg, 40 kg] so as to satisfy the blending ratio. In FIG. 2, these are “measurement target value” and “basic set value” of “normal mode setting 80%”, “first correction mode setting 90%”, “second correction mode setting 100%”. It is described in the column.

  Conventionally, the raw materials A, B, C, and D are generally supplied so as to satisfy a certain blending ratio at a rated weight of 100 kg, whereas in the normal mode of this embodiment, for example, 80 kg of 80% thereof. The raw materials A, B, C, and D are supplied so as to satisfy a certain blending ratio. Since the blending ratio is 1: 2: 3: 4, the target value of the raw material A is 80 × 1 / (1 + 2 + 3 + 4) = 8 kg. Similarly, the target value of the raw material B is 80 × 2 / (1 + 2 + 3 + 4) = 16 kg, the target value of the raw material C is 80 × 3 / (1 + 2 + 3 + 4) = 24 kg, and the target value of the raw material D is 80 × 4 / (1 + 2 + 3 + 4) = 32 kg. That is, the basic setting in the normal mode is [8 kg, 16 kg, 24 kg, 32 kg], which is the measurement target value H1 [8 kg, 16 kg, 24 kg, 32 kg] in the normal mode as it is.

  In the first correction mode, since it is 90%, the blending weight is 90 kg, and the basic set value H2 of each raw material A, B, C, D is [9 kg, 18 kg, 27 kg, 36 kg].

  In the second correction mode, since it is 100%, the blending weight is 100 kg, and the basic set value H3 of each raw material A, B, C, D is [10 kg, 20 kg, 30 kg, 40 kg].

  Hereinafter, in each mode, the normal time when no misweighing has occurred and the misweighing time when the misweighing has occurred will be described based on FIG. 2, but the following description includes cases that are not described in FIG. 2. Yes.

[1] Normal mode 1-1. (Normal)
In the normal mode, the blending weight as a unit of discharge is 80 kg, and the measurement target value H1 of each raw material A, B, C, D is [8 kg, 16 kg, 24 kg, 32 kg] (“normal mode setting 80%”) (Refer to “Measurement target value”). It is assumed that the measured actual measurement value J1 in the normal mode of each of the raw materials A, B, C, and D is [8 kg, 16 kg, 24 kg, 32 kg] as expected due to the measurement blending in the normal mode (not shown in FIG. 2). (Illustrated). The total is 80 kg. When the desired metering and blending is performed, the gate 4 is opened by driving the gate opening / closing cylinder 5, and 80 kg of the blended material is discharged from the metering hopper 3 to the mixing tank 8.

  Then, the metering blending in the normal mode with 80 kg as a unit is repeated. In other words, if no weighing error occurs, the operation of one cycle of metering and discharging with a basic compounding weight of 80 kg with the measuring target value H1 [8 kg, 16 kg, 24 kg, 32 kg] of each raw material A, B, C, D repeat.

1-2. (At the time of erroneous weighing) ... described in FIG. 2 In addition to the above, [8 kg, 16 kg] where any one or more of the actual measurement values J1 of the raw materials A, B, C, D in the normal mode is the measurement target value H1. , 24 kg, 32 kg] and out of the allowable range, that is, erroneous weighing occurs. For example, as in the example of FIG. 2, it is assumed that the raw material C has shifted and its measured measurement value is 25.5 kg. More specifically, it is assumed that the measured actual value J1 of each of the raw materials A, B, C, and D is [8 kg, 16 kg, 25.5 kg, 32 kg] (the “measured actual value” of “normal mode setting 80%”). Column). In this case, the error between the actual measurement value J1 and the measurement target value H1 in the normal mode is [± 0 kg, ± 0 kg, +1.5 kg, ± 0 kg] (see the column “Error”). As described above, when at least one of the actual measurement values J1 of the raw materials A, B, C, and D deviates from the measurement target value H1, the normal mixture mode is exited without discharging the blended raw materials until then. Thus, the process proceeds to the first correction mode of the next stage.

[2] First correction mode In the first correction mode, the basic setting values of the raw materials A, B, C, and D satisfying a certain mixing ratio at a mixing weight of 90 kg larger than the basic mixing weight of 80 kg in the normal mode. H2 is [9 kg, 18 kg, 27 kg, 36 kg] (refer to the column of “basic setting value” in “setting of first correction mode 90%”). Since each raw material A, B, C, and D is already blended with [8 kg, 16 kg, 25.5 kg, 32 kg] as the measured measurement value J1 in the normal mode, the setting of the remaining amount is (9-8) = 1 kg. , (18-16) = 2 kg, (27-25.5) = 1.5 kg, (36-32) = 4 kg (“Measurement target value” column of “Setting of the first correction mode 90%”) reference). The ratio of [1 kg, 2 kg, 1.5 kg, 4 kg] of the measurement target value h2 is 1: 2: 1.5: 4, which is naturally compared with a fixed blending ratio 1: 2: 3: 4. It is different. In other words, erroneous weighing has occurred, and the setting has been reset to cancel the error of the erroneous weighing that has occurred. When this setting is completed, additional measurement of each raw material A, B, C, D is started based on the setting. The additional measurement target value h2 of each raw material A, B, C, D is [1 kg, 2 kg, 1.5 kg, 4 kg].

2-1. (Normal) Not shown in FIG. 2 Although not shown in FIG. 2 due to the metering blending in the first correction mode, the measured actual value J2 of each raw material A, B, C, D as expected. Is [1 kg, 2 kg, 1.5 kg, 4 kg] (refer to the “Measurement actual measurement value” column in “Setting of the first correction mode 90%”). When this and the measurement actual value J1 [8 kg, 16 kg, 25.5 kg, 32 kg] in the normal mode are integrated, (8 + 1) = 9 kg, (16 + 2) = 18 kg, (25.5 + 1.5) = 27 kg, ( 32 + 4) = 36 kg (refer to the “cumulative measurement actual measurement value” column of “setting of first correction mode 90%”). The total amount is (9 + 18 + 27 + 36) = 90 kg, and the blending ratio is 9: 18: 27: 36 = 1: 2: 3: 4. This is a blending in a state that exactly matches the intended blending ratio 1: 2: 3: 4 at the 90% stage. When metered blending is performed as expected, a total of 90 kg of blended raw materials are discharged. Next, the operation of the normal mode in the unit of 80 kg of the above [1] (the weighing target value H1 [8 kg, 16 kg, 24 kg, 32 kg] of each raw material A, B, C, D is measured and the basic mixing weight is 80 kg. 1 cycle operation of blending and discharging) is repeated.

2-2. (Incorrect measurement) ... described in FIG. 2 In addition to the above, any one or more of the actual measurement values J2 of the raw materials A, B, C, and D in the first correction mode is the measurement target value h2. 1 kg, 2 kg, 1.5 kg, 4 kg] and out of the permissible range, that is, erroneous weighing occurs. For example, as in the example of FIG. 2, it is assumed that the raw material C is shifted and its measured measurement value is 3 kg. More specifically, it is assumed that the measured actual value J2 of each of the raw materials A, B, C, and D is [1 kg, 2 kg, 3 kg, 4 kg] (the “measured actual value” in “the first correction mode setting 90%”). Column). As for the integrated amount so far, [1 kg, 2 kg, 3 kg, 4 kg] is added to [8 kg, 16 kg, 25.5 kg, 32 kg], and (8 + 1) = 9 kg, (16 + 2) = 18 kg, (25 .5 + 3) = 28.5 kg and (32 + 4) = 36 kg. More specifically, the cumulative measurement value of each raw material A, B, C, D in the first correction mode is [9 kg, 18 kg, 28.5 kg, 36 kg] (“setting of the first correction mode 90% "See the" Accumulated measurement value "column). Since the basic setting value H2 is [9 kg, 18 kg, 27 kg, 36 kg] in “the setting of the first correction mode 90%”, the measurement actual value J2 and the measurement target value h2 in the first correction mode in this case Is [± 0 kg, ± 0 kg, +1.5 kg, ± 0 kg] (see the column “Error”). In this way, when at least any one of the actual measurement values J2 of the raw materials A, B, C, and D is deviated from the secondary set measurement target value h2, the mixed raw materials are not discharged until then. Exit from the first correction mode and shift to the second correction mode of the next stage.

[3] Second correction mode In the second correction mode, since the setting is 100%, the basic setting of each raw material A, B, C, D satisfying a certain blending ratio with a blending weight of 100 kg as a unit of discharge. The value H3 is [10 kg, 20 kg, 30 kg, 40 kg] (refer to the “basic setting value” column of “second correction mode setting 100%”). Since the raw materials A, B, C, and D are already blended with the cumulative measured value [9 kg, 18 kg, 28.5 kg, 36 kg] in the first correction mode, the remaining amount is set to (10-9) = 1 kg, (20-18) = 2 kg, (30-28.5) = 1.5 kg, (40-36) = 4 kg (the “measurement target value” of “second correction mode setting 100%” Column). The ratio of the measurement target value h3 [1 kg, 2 kg, 1.5 kg, 4 kg] is 1: 2: 1.5: 4, which is naturally different from the constant mixing ratio 1: 2: 3: 4. It has become a thing. In other words, erroneous weighing has occurred, and the setting has been reset to cancel the error of the erroneous weighing that has occurred. When this setting is completed, additional measurement of each raw material A, B, C, D based on the setting is started. The measurement target value h3 of each raw material A, B, C, D is [1 kg, 2 kg, 1.5 kg, 4 kg].

  The measurement target value h2 in the first correction mode and the measurement target value h3 in the third correction mode are the same, but this is only a coincidence.

3-1. (Normal) ... described in FIG. 2 The measured measurement value J3 of each raw material A, B, C, and D is [1 kg, 2 kg, 1.5 kg, 4 kg] as expected by measuring and blending in the second correction mode. (Refer to the “Measurement measurement value” column of “Second correction mode setting 100%”). When this and the accumulated measurement actual value [9 kg, 18 kg, 28.5 kg, 36 kg] in the first correction mode are integrated, (9 + 1) = 10 kg, (18 + 2) = 20 kg, (28.5 + 1.5) = 30 kg, (36 + 4) = 40 kg (refer to the “cumulative measurement actual measurement value” column of “second correction mode setting 100%”). The total amount is (10 + 20 + 30 + 40) = 100 kg, and the blending ratio is 10: 20: 30: 40 = 1: 2: 3: 4. This is a blending in a state that exactly matches the intended blending ratio 1: 2: 3: 4 at the 100% stage. The error in this case is [± 0 kg, ± 0 kg, ± 0 kg, ± 0 kg] (see the column “Error”). When metered blending is performed as expected, a total of 100 kg of blended raw materials are discharged. Next, the operation of the normal mode in the unit of 80 kg of the above [1] (the weighing target value H1 [8 kg, 16 kg, 24 kg, 32 kg] of each raw material A, B, C, D is measured and the basic mixing weight is 80 kg. 1 cycle operation of blending and discharging) is repeated. FIG. 2 corresponds to a series of processes so far (normal mode → first correction mode → second correction mode).

3-2. (At the time of erroneous measurement) ... not shown in FIG. 2 Although not shown in FIG. 2, apart from the above, any one or more of the actual measurement values J3 of the raw materials A, B, C, D is the target value. [1kg, 2kg, 1.5kg, 4kg] is out of the allowable range and mismeasurement occurs. In this case, the operation is temporarily stopped without discharging. After the operation is stopped, the mode is changed to the manual mode.

  In the manual mode, the raw material is additionally supplied by an operator (operator) by manual operation to correct erroneous weighing, and then the automatic start push button is turned on to resume the operation in the normal mode. In this method, even if erroneous weighing occurs in the second correction mode, it is not necessary to dispose of the blended material.

  Next, the schematic operation of the weighing and blending apparatus will be described based on the flowchart of FIG.

  First, various settings such as the above basic set values in each mode are performed by operating the controller 7 (step s1), and the operation is started (step s2).

  First, measurement in the normal mode is started (step s3), and it is determined whether or not erroneous measurement has occurred through the operation in the normal mode (step s4). Specifically, each raw material A, B, C, D is weighed sequentially, and when an erroneous weighing occurs, the erroneous weighing is stored, and all the raw materials A, B, C, It is determined whether or not an erroneous measurement has occurred by the time point when the measurement of D is completed.

  In step s4, when erroneous weighing does not occur, that is, when erroneous weighing does not occur through the operation in the normal mode, the mixed raw material is discharged from the weighing hopper 3 to the mixing tank 8 (step s5). Then, it is determined whether or not an operation end command has been issued (step s6). If there is no operation end command, the process returns to the normal mode at step s3. Accordingly, when no erroneous weighing occurs through the operation in the normal mode, the metering and mixing of the raw material and the discharging process of the mixed material in the normal mode are repeatedly executed.

  In step s4, when an erroneous weighing occurs through the operation in the normal mode, that is, until the measurement of all the raw materials A, B, C, D in the normal mode is completed, an erroneous weighing is performed on any of the raw materials. When it occurs, the basic setting value of the first correction mode described above is read without performing the process of discharging the blended raw material (step s7), and the actual measurement value weighed in the normal mode is subtracted from the basic setting value. In the correction mode 1, the measurement target value of each raw material to be additionally supplied is calculated and set (step s8).

  Next, based on this setting, weighing is started in the first correction mode (step s9), and it is determined whether or not erroneous weighing has occurred through the operation in the first correction mode (step s10). Specifically, additional weighing of each raw material is sequentially performed in the first correction mode, and when an erroneous weighing occurs, the erroneous weighing is stored, and the additional weighing in the first correction mode is completed. By this time, it is determined whether or not erroneous weighing has occurred.

  In this step s10, when erroneous weighing has not occurred, that is, when erroneous weighing has not occurred through the operation in the first correction mode, a step of discharging the blended raw material from the weighing hopper 3 to the mixing tank 8 is performed. Returning to s5, when there is no command to end the operation, the process returns to the normal mode of step s3 (step s6). Therefore, when no erroneous weighing occurs through the operation in the first correction mode, the mixed raw material is discharged and the normal mode is restored.

  In step s10, when an erroneous weighing occurs through the operation of the first correction mode, that is, when an erroneous weighing occurs for any of the raw materials by the time when the additional weighing in the first correction mode is completed. Without reading out the blended raw material, the basic setting value of the second correction mode described above is read (step s11), and the actual measurement value measured from the basic setting value to the first correction mode is subtracted. In the second correction mode, the measurement target value of each raw material to be additionally supplied is calculated and set (step s12).

  Next, based on this setting, weighing is started in the second correction mode (step s13), and it is determined whether or not erroneous weighing has occurred through operation in the second correction mode (step s14). Specifically, the additional weighing of each raw material is sequentially performed in the second correction mode, and when an erroneous weighing occurs, the erroneous weighing is stored, and the additional weighing in the second correction mode is completed. By this time, it is determined whether or not erroneous weighing has occurred.

  In this step s14, when erroneous weighing has not occurred, that is, when erroneous weighing has not occurred through the operation in the second correction mode, a step of discharging the blended raw material from the weighing hopper 3 to the mixing tank 8 is performed. Returning to s5, when there is no command to end the operation, the process returns to the normal mode of step s3 (step s6). Accordingly, when no erroneous weighing occurs through the operation in the second correction mode, the blended raw material is discharged and the normal mode is restored.

  In step s14, when an erroneous weighing occurs through the operation of the second correction mode, that is, when an erroneous weighing occurs for any of the raw materials by the time when the additional weighing in the second correction mode is completed. Then, the operation of the blending and weighing apparatus is temporarily stopped without performing the blending raw material discharge process (step s15).

  The operator (operator) changes the operation mode to the manual operation mode by a manual operation in a state where the blending weighing device is temporarily stopped (step s16), and the operator manually blends the raw material in the weighing hopper 3 by the manual operation. The excess or deficiency is adjusted and the blended raw material is discharged (step s17).

  Further, the operator changes the operation mode to the automatic operation mode by manual operation (step s18), and turns on the automatically activated push button (PB) by manual operation (step s19).

  When the push button is turned on and an activation signal is input, the process enters step s20 to resume automatic activation, and then returns to the normal mode in step s3.

  As described above, when no erroneous weighing occurs, the cycle of the normal mode of discharging the blended raw materials weighed so as to satisfy a certain blending ratio with the basic blending weight is repeated, while when the erroneous weighing occurs, Shifts to the correction mode without discharging the compounding raw material, and in this correction mode, an erroneous weighing caused by additionally supplying the raw material so as to satisfy a certain compounding ratio with a compounding weight larger than the basic compounding weight. Therefore, even if erroneous weighing occurs, it is not necessary to discard the blended raw material, and the raw material loss can be reduced.

  In addition, although the cause of mismeasurement is various, such as the property of a raw material and the stability of a supply state, it may originate in the adjustment defect of an apparatus, for example. In such a case, mismeasurement is likely to occur for a specific type of raw material. Therefore, if a mismeasurement occurs for a specific type of raw material, a warning may be displayed to encourage inspection and maintenance. .

  In this embodiment, the first and second correction modes are provided as the correction modes. However, three or more correction modes may be provided, or only the first correction mode may be provided. Good.

  In this embodiment, the raw materials A, B, C, and D are sequentially supplied from the raw material tanks 1a, 1b, 1c, and 1d to the single weighing hopper 3 and weighed. As an embodiment, for example, as shown in FIG. 4, a plurality of weighing hoppers 3 a, 3 b, 3 c, 3 d and each weighing hopper 3 a so as to individually correspond to each raw material tank 1 a, 1 b, 1 c, 1 d. , 3b, 3c, 3d are provided with load cells 6,..., And the raw materials A, B, C, D are supplied from the raw material tanks 1a, 1b, 1c, 1d to the respective weighing hoppers 3a, 3b, 3c, 3d. Alternatively, they may be supplied and weighed simultaneously through the discharge gates 37a, 37b, 37c, and 37d.

  Also in this case, as in the above-described embodiment, in the normal mode, the raw materials A, B, C, and D are supplied from the raw materials tanks 1a, 1b, 1c, and 1d so as to satisfy a certain mixing ratio with the basic mixing weight. Are simultaneously fed to the weighing hoppers 3a, 3b, 3c, 3d and weighed, and when no erroneous weighing occurs, the raw materials of the weighing hoppers 3a, 3b, 3c, 3d are discharged into the discharge gates 38a, 38b, 38c, 38d. The cycle of discharging to the conveyor 31 is repeated. Further, when an erroneous weighing occurs in the normal mode, the process proceeds to the first correction mode without discharging the raw materials of the respective weighing hoppers 3a, 3b, 3c, 3d. In the first correction mode, the basic correction is performed. The raw materials A, B, C, and D are simultaneously transferred from the raw material tanks 1a, 1b, 1c, and 1d to the weighing hoppers 3a, 3b, 3c, and 3d so as to satisfy a certain mixing ratio with a mixing weight larger than the mixing weight. When additional weighing is performed and no weighing occurs, the raw materials of the weighing hoppers 3a, 3b, 3c, and 3d are discharged to the conveyor 31 and the normal mode is restored.

  Furthermore, when erroneous weighing occurs in the first correction mode, the process proceeds to the second correction mode without discharging the raw materials of the respective weighing hoppers 3a, 3b, 3c, 3d. In this second correction mode, The raw materials A, B, C, and D are simultaneously added from the raw material tanks 1a, 1b, 1c, and 1d to the respective weighing hoppers 3a, 3b, 3c, and 3d so as to satisfy a certain mixing ratio with the larger mixing weight. When supplied and weighed and no erroneous weighing has occurred, the raw materials of the weighing hoppers 3a, 3b, 3c and 3d are discharged to the conveyor 31 to return to the normal mode. In FIG. 4, the blended raw material discharged to the conveyor 31 is mixed in the mixing tank 32, stored in the storage tank 35 via the conveyors 33 and 34, and supplied to the melting furnace 36.

  In each of the above-described embodiments, the load cell 6 is provided on the weighing hoppers 3, 3a, 3b, 3c, and 3d, and the supply amounts of the raw materials A, B, C, and D are measured and controlled (supply amount control). As another embodiment of the invention, a load cell 6 may be provided on the raw material tanks 1a, 1b, 1c, and 1d, and the discharge amount of the raw material may be measured and controlled (discharge amount control), or both may be combined. Good.

1a, 1b, 1c, 1d Raw material tank 2a, 2b, 2c, 2d Feeder 3, 3a, 3b, 3c, 3d Weighing hopper 4 Discharge gate 6 Load cell 7 Controller 8, 32 Mixing tank 19, 36 Melting furnace

Claims (5)

A plurality of raw material supply means for supplying each of a plurality of types of raw materials;
A weighing means for weighing each supplied raw material;
Discharging means for discharging the measured raw material;
Controlling the supply of each raw material by the raw material supply means so as to satisfy a certain blending ratio based on the measured value of the weighing means, and a control means for controlling the discharge of the raw material by the discharge means,
The control means, as a control mode, has a normal mode and at least one correction mode for correcting so as to satisfy the certain blending ratio when an erroneous weighing occurs,
In the normal mode, with the basic blending weight blended with the plurality of types of raw materials, the feed of each raw material is controlled by the raw material feeding means so as to satisfy the certain blending ratio, and all the raw materials are weighed, When a certain blending ratio is satisfied, the discharging means discharges the blended raw material, while when erroneous weighing occurs and the certain blending ratio is not satisfied, the discharging means prohibits the discharge of the blending raw material, and Move to correction mode,
In the correction mode, the raw material supply means additionally supplies raw materials by the raw material supply means so as to satisfy the certain blending ratio with a blending weight larger than the basic blending weight, and satisfies the certain blending ratio. the time was, with discharging the mixed material by said discharge means, which returns to the normal mode,
The large blending weight is not more than the rated weight of the weighing means and is a predetermined proportion of the weight relative to the rated weight.
A metering and blending device characterized by that. The correction mode is the first correction mode,
In the first correction mode, the raw material is additionally supplied and the raw material is weighed. When erroneous weighing occurs and the predetermined mixing ratio is not satisfied, the discharge of the mixed raw material by the discharging means is prohibited and the second Shift to the correction mode of
In the second correction mode, the raw material supply means additionally supplies raw materials to measure the raw materials so as to satisfy the predetermined mixing ratio with a larger mixing weight than the large mixing weight, and the constant mixing When the ratio is satisfied, the blending material is discharged by the discharging means, and the normal mode is restored.
The metering and blending device according to claim 1. In the first correction mode or the second correction mode, the raw material is additionally supplied and the raw material is weighed. When an erroneous measurement occurs and the predetermined blending ratio is not satisfied, the process does not proceed to the next correction mode. , Shifting to the manual mode, and manually controlling the additional supply of the raw material by the supply means so as to satisfy the certain blending ratio,
The metering and blending device according to claim 2. The weighing means is supplied with the plurality of types of raw materials,
The weight of the predetermined ratio with respect to the rated weight is the weight of the first predetermined ratio,
Blending weight of said base is a weight of the second predetermined ratio prior Kijo rated weight,
The metering and blending device according to any one of claims 1 to 3. A measuring and blending method in which a plurality of types of raw materials are weighed and blended so as to satisfy a certain blending ratio,
It has a normal mode and a correction mode,
In the normal mode, all raw materials are weighed by controlling the supply of each raw material so that a certain blending ratio is satisfied at the basic blending weight. When the certain blending ratio is met, On the other hand, when an erroneous measurement occurs and the predetermined blending ratio is not satisfied, the metered blending raw material is prohibited from being discharged, and the process proceeds to the correction mode.
In the correction mode, the raw material is additionally supplied to measure the raw material so as to satisfy the certain blending ratio with the blending weight larger than the basic blending weight, and when the certain blending ratio is satisfied, the metering is performed. While discharging the blended raw material, it is to return to the normal mode,
The large blending weight is not more than the rated weight of the weighing means for weighing the plurality of types of raw materials, and is a predetermined proportion of the weight relative to the rated weight.
A metering method characterized by that.

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