JP2020067283A - Material blending apparatus - Google Patents

Abstract

To provide a material blending apparatus capable of selectively treating both the case where a predetermined first powdered granular material among powdered granular materials of different phases is not an essential blending object and the case where it is an essential blending object.SOLUTION: A control unit 31 is capable of selectively executing: a first weighing mode in which a first powdered granular material to be weighed in a weighing process of a predetermined first powdered granular material among powdered granular materials of different phases is determined not to meet a target weighing value and, moves to the weighing process of other powdered granular materials if a weighing process of other powdered granular materials remains, and finishes one batch weighing process if the weighing process of other powdered granular materials does not remain; and a second weighing mode in which predetermined weighing error processing is performed if the first powdered granular material to be weighed in the weighing process of the first powdered granular material is determined to be less than the target weighing value.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a material blending device for weighing and blending a plurality of types of powdery or granular material with a weighing machine.

  2. Description of the Related Art Conventionally, a material blending device is known in which a plurality of types of powdery or granular materials are weighed and blended in a weighing machine so that a predetermined blending ratio (mass ratio) is obtained. In such a material mixing device, in addition to the main material and various additives, molding by-products such as sprues, runners, burrs, etc. taken out from the molding machine and separated from the molded product, and crushed materials such as defective molded products In some cases, a crushed material obtained by crushing is mixed. Since such a pulverized material is formed according to the operation of the molding machine, there are problems such that a predetermined amount cannot be measured due to insufficient storage of a container for storing the pulverized material, or the preparation for molding is delayed. It was

  For example, in Patent Document 1 below, each raw material supplied from four raw material hoppers (material feeders) that store a main material, a crushed material, a masterbatch material, and an additive material is metered to have a predetermined mixing ratio. A material blending device configured to measure in a hopper (measuring machine) is disclosed. In addition, in this material blending device, when measuring the pulverized material, if the measurement is completed within a certain time from the start of the supply of the pulverized material, the target amount of the pulverized material in the next batch operation is increased to a large amount. On the other hand, when the fixed amount of time passes before the measurement of the pulverized material is completed, the target amount of the pulverized material in the next batch operation is set to a small amount.

JP2012-176599A

  However, in the material blending device described in Patent Document 1, for example, even when there is no crushed material in the raw material hopper at the initial stage of molding or when the molding machine is temporarily stopped, the crushing as described above is performed. The target amount of material is adjusted to complete the batch operation. Therefore, when the blending of the pulverized material is indispensable, it becomes difficult to cope with it, and further improvement is desired.

  The present invention has been made in view of the above circumstances, in the case where the predetermined first granular material of the different granular material is not an essential compounding target and an essential compounding target It is an object of the present invention to provide a material blending device that can selectively cope with any of these.

  In order to achieve the above-mentioned object, the material blending device of the present invention has a material feeder that stores different granular material materials and supplies them toward the downstream side, and the respective powder particles supplied from these material feeders. A weighing machine for accommodating and weighing body material, and controlling each of the material feeders so that the target weighing value set in advance for each of the different powdery or granular material is controlled toward the weighing machine. A control unit for sequentially supplying the body material, wherein the control unit measures the first powdery granular material of the different powdery granular materials in the first measuring step. If it is judged that the granular material does not reach the target measurement value and there are remaining measuring steps for other granular material, the process moves to the measuring step for other granular material, while the other granular material If there are no material weighing processes remaining, the first weighing mode that completes one batch weighing process. And a second weighing mode in which predetermined weighing abnormality processing is performed if it is determined that the first powdered or granular material weighed in the weighing step of the first powdered or granular material does not reach a target weighing value. , Are selectively executable.

  Since the material blending device of the present invention is configured as described above, when the predetermined first granular material of different granular materials is not an essential compounding target and when it is an essential compounding target Either of them can be selectively dealt with.

FIG. 1 is a system diagram of a material blending system including a material blending device according to an embodiment of the present invention and its peripheral devices. It is a basic block diagram of the principal part of the same material mixing apparatus. It is a flowchart which shows the basic operation | movement in the 1st measurement mode in the 1st example of the same material mixing apparatus. It is a flow chart which shows the basic operation of the 2nd measurement mode in the 1st example of the material mixing device. It is a flow chart which shows the basic operation of the 1st measurement mode in the 2nd example of the material mixing device. It is a flowchart which shows the basic operation | movement of the 2nd measurement mode in the 2nd example of the same material mixing apparatus.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, a schematic configuration of a material blending system A including the present material blending apparatus 1 and its peripheral devices will be described with reference to the system diagram of FIG.

  The material blending apparatus 1 accommodates and measures the material feeders 10 that store different powdery granular materials and supply them toward the downstream side, and the powdery granular materials that are supplied from these material feeders 10. Control of the weighing machine 20 and each of the material feeders 10 so that the target weighing value set in advance for each different powdery or granular material is controlled, and the powdery or granular material is sequentially supplied to the weighing machine 20. And a section 31.

  The material supply device 10 includes a storage container 12 that stores the powder and granular material, and a supply unit 11 that supplies the powder and granular material toward the weighing machine 20 that is the supply destination. In the present embodiment, the material feeder 10 is configured to feed the powdery or granular material toward the weighing machine 20 (weighing container 21) installed on the lower side so that the material has a predetermined target value. . The specific configuration of the material feeder 10 will be described later.

  Here, the above-mentioned powder / granular material refers to a powder / granular material, and includes fine flaky material, short fiber material, sliver material, and the like. Further, as the above material, any material such as synthetic resin material such as resin pellet or resin fiber piece, metal material, semiconductor material, wood material, chemical material, food material, etc. may be used. Examples of the powdery material include natural materials (virgin materials), crushed materials, master batch materials, various additives, etc. when molding synthetic resin molded products. Further, it may be configured to include reinforcing fibers such as glass fibers and carbon fibers.

  In the present embodiment, a material blending device that blends a plurality of material feeders 10 corresponding to a plurality of different types of powdery or granular material so that a plurality of types of powdery or granular material have a predetermined blending ratio (mass ratio). The configuration incorporated in 1.

  The material blending system A includes a plurality of material feeders 10 (10A, 10B, 10C, 10D) that store different powdery material materials, and the powdery material materials supplied from the material supplier 10. And a weighing machine 20 for receiving and weighing. The illustrated example shows an example in which four material feeders 10 are provided. These four material feeders 10 are a first material feeder 10A for supplying a crushed material, a second material feeder 10B for supplying a natural material as a main material, a third material feeder 10C for supplying a master batch material, and The fourth material supplier 10D for supplying the additive material may be configured. In addition, when it is not necessary to distinguish among the first material supplier 10A, the second material supplier 10B, the third material supplier 10C, and the fourth material supplier 10D, the material supplier 10 will be simply described.

  Further, the first material supplier 10A is provided with a first powder material sensor 14 for detecting the lower limit level of the first powder material (crushed material) in the material supplier 10. The first particulate material sensor 14 will be described later in the description of FIGS. 2, 5 and 6.

  In addition, the material blending system A includes a mixing tank 25 in which a stirring blade 26 that mixes the powder and granular material measured and discharged by the weighing machine 20 is rotatably arranged. The illustrated example shows an example in which the weighing machine 20 (weighing container 21) and the mixing tank 25 (stirring blade 26) are provided in a unitized casing 23. At the upper end of the casing 23, an appropriate holding portion for holding the storage container 12 of each material feeder 10 is provided.

  The weighing machine 20 includes a weighing container 21 and a detection unit 22 including a mass detector such as a load cell, and the detection unit 22 is held by a casing 23. In addition, the upper end side of the weighing container 21 is provided with a charging port that opens upward. The input port of the measuring container 21 is provided so as to be able to receive each granular material supplied from each upstream (upper) material supply device 10. Further, at the lower end side of the weighing container 21, there are provided a discharge port that opens downward and an opening / closing mechanism that opens and closes the discharge port. In the illustrated example, as the opening / closing mechanism, an example is shown in which a lid body is provided that is slanted upward and is moved in a pendulum shape to open the discharge port.

  Note that the opening / closing mechanism is not limited to such a mode, and may be a slide shutter that slides in a substantially horizontal direction, or a flap shape supported by an arm-shaped support portion that is rotated around the rotation axis on the side of the weighing container 21. The valve body may be a valve body, or may have various other configurations.

  The stirring blade 26 is provided so as to be located below the weighing container 21, and is rotated by an appropriate drive unit. The powdery or granular material mixed in the mixing tank 25 provided with the stirring blades 26 is supplied to the molding machine 2 as the supply destination of the material blending system A. The illustrated example shows an example in which the casing 23 is installed on the molding machine 2. The molding machine 2 may be, for example, an injection molding machine for molding a synthetic resin molded product, but may be an injection molding machine for other materials, or an extrusion molding machine or a compression molding machine for various materials. Other molding machines may be used. Further, the supply destination of the material blending system A is not limited to a single supply destination, and may be a plurality of supply destinations. In addition, the powdery or granular material mixed in the mixing tank 25 is not limited to the aspect in which the powdery material is supplied to the molding machine 2 as the supply destination in a drooping manner. It may be configured to be pneumatically transported toward the supply destination. In this case, instead of installing the casing 23 on the molding machine 2, the casing 23 may be supported by an appropriate frame or pedestal.

  Further, in the example of the drawing, an example is shown in which the material blending system A is provided with an air transporter 4 for pneumatically transporting the granular material from the material source 3 toward each material feeder 10. In the illustrated example, a first material source 3A connected to the first material supply device 10A via a material transport pipeline, and a second material source 3B connected to the second material supply device 10B via a material transport pipeline. And a third material source 3C connected to the third material supply device 10C via a material transport pipeline, and a fourth material source 3D connected to the fourth material supply device 10D via a material transport pipeline. An example provided as the material source 3 is shown. When it is not necessary to distinguish among the first material element 3A, the second material element 3B, the third material element 3C, and the fourth material element 3D, the material element 3 will be simply described.

  Further, in the illustrated example, the second material element 3B, the third material element 3C, and the fourth material element 3D are shown as tank-shaped examples. Further, an example in which the first material source 3A is a crusher for crushing molding by-products such as sprues, runners, burrs and the like, which are taken out from the molding machine 2 and separated from the molded product, and crushed materials such as defective products Shows. Further, the first material source 3A is provided with a pulverized material sensor 3a for detecting the storage level of the powder material. The material to be crushed may be charged into the charging hopper of the crusher by an appropriate conveying device such as a molding by-product take-out device or a belt conveyor.

  The material transport pipes connected to these material sources 3 are connected to a hopper-shaped collecting portion 13 provided at the upper end of the storage container 12 of each material feeder 10. An air suction pipe line connected to the air transporter 4 is connected to these collecting units 13. In addition, the collection unit 13 is provided with a separation unit that separates the granular material from the transportation air that is directed to the air suction pipeline. As such a separation unit, any material may be used as long as it can separate the granular material and the transport air, but while passing the dust in addition to the transport air, the granular material used as the raw material It may be a punching metal or a mesh-like perforated plate for preventing the passage of the metal, or may be a baffle-shaped one. In addition, it is possible to employ a separating unit having various configurations. Further, the separating mechanism of the collecting unit 13 may be a so-called cyclone type structure having a structure for separating the granular material from the transport air.

  The air suction pipes connected to these collection units 13 are connected to the air transportation machine 4 via the transportation air switching valve 5. The transportation air switching valve 5 is configured to be switched so that any one of the plurality of air suction pipelines communicates with the suction side of the air transportation machine 4. The air transporter 4 is provided with an appropriate dust collecting section such as a bag filter or a cyclone filter, a suction blower constituting a transportation air source, and the like.

  Further, the material blending system A includes a control panel device 30 having a control unit 31 including a CPU and a program for controlling each unit of the material blending system A. The control panel device 30 may be provided in an appropriate place of the material blending system A, for example, attached to the casing 23, the air transporter 4, or the like, or may be installed in a separated place. Details of the configuration of the control panel device 30 and the operation of the control unit 31 will be described later in the description of FIG.

  In the material blending system A configured as described above, a transportation mode in which the granular material is pneumatically transported from the material source 3 to the material feeder 10, a weighing mode in the weighing container 21, and a mixing tank 25 Mixed mode and are executed.

  In the transport mode, if the material sensor of the material feeder 10 outputs the material request signal, the air suction pipe connected to the collection unit 13 of the material feeder 10 and the air transporter 4 are communicated with each other. Thus, the transportation air switching valve 5 is switched and the transportation air source of the air transportation machine 4 is activated. Thereby, the granular material is transported from the material source 3 to the material supplier 10. When the material request signals are output from the material sensors of a plurality (all) of the material feeders 10 at the beginning of operation of the material blending system A, the material feeders 10 are set in accordance with preset priorities and the like. The transportation mode may be sequentially executed toward the.

  When the transportation mode is executed as described above and the granular material is stored in each material feeder 10, the measurement mode is executed.

  In the weighing mode, each of the supply units 11 of the respective material feeders 10 is controlled so that the target weighing value set in advance for each different granular material is controlled, and each granular material is directed toward the weighing container 21. The materials may be sequentially supplied to perform one batch weighing. The target measurement value for each powder or granular material may be calculated and set based on the one batch target amount and the mass ratio for each powder or granular material.

  If one batch of powdered or granular material is stored in the weighing container 21 and the material sensor of the mixing tank 25 outputs a material request signal, the discharge port of the weighing container 21 is opened and directed toward the mixing tank 25. Alternatively, the mixing blade may be discharged and the stirring blade 26 may be rotated to execute the mixing mode. When the weighing container 21 is empty, the weighing mode is executed, and the weighing container 21 stores one batch of the granular material until the material request signal is output from the material sensor of the mixing tank 25. You may leave it.

  When the powdery or granular material is mixed in the mixing tank 25 as described above, the molding machine 2 appropriately executes the molding preparatory process such as discarding and trial driving, and shifts to the steady operation process in which the molding process is sequentially performed. To do. Further, the material to be crushed generated in the molding machine 2 is appropriately crushed in the crusher that constitutes the first material source 3A. Similarly, if a material request signal is output from the material sensor of the mixing tank 25, the discharge port of the measuring container 21 is opened to execute the mixing mode, and if the measuring container 21 becomes empty, the measuring mode is changed. Run. If the material request signal is output from the material sensor of each material feeder 10, the transportation mode is executed. It should be noted that each mode executed in the material blending system A is not limited to the above-described mode, and various other modifications are possible.

  Further, the mode of pneumatically transporting the granular material from the material source 3 toward the collecting portion 13 is not limited to the suction transportation as described above, and compressed air is supplied to the discharge portion of the material source 3 to collect the granular material. The powdery or granular material may be pressure-fed toward the collecting portion 13. In this case, the collecting unit 13 may be connected to an exhaust pipe provided with an appropriate dust collecting unit. Further, the mode of supplying (supplementing) the granular material to each material supply device 10 is not limited to the mode of pneumatic transportation, and may be a mode in which the material is dropped by gravity from the upstream side (upper side) to supply (supplementing). Alternatively, it may be done by an operator.

  Further, instead of the aspect in which the supply unit 11 described below is provided in each of the plurality of material feeders 10, at least one is provided, and another material feeder is provided with another supply unit. Good. As such other supply unit, a slide shutter, a screw feeder, a vibration feeder, a mass feeder, a rotary feeder, a table feeder, or the like may be used, and those having various configurations can be adopted.

  Further, in the above-described example, the example in which the mixing tank 25 is provided in the casing 23 is shown, but instead of such an aspect, another mixing mechanism may be provided. For example, a mode may be adopted in which the powdery or granular material that has been weighed and mixed in the weighing container 21 is pneumatically transported to a collecting unit (not shown) of the molding machine and mixed in the collecting unit. The specific configuration of each member and each part incorporated in the material blending system A is not limited to the above-described configuration, and various modifications are possible.

  Next, the configuration of the control panel device 30 included in the material blending system A (material blending device 1) and the basic operation of the control unit 31 included in the control panel device 30 will be described with reference to FIG.

  The control panel device 30 includes a control unit 31 including a CPU and various programs, a display operation unit 32 for controlling and monitoring the system, and a storage unit 33 for storing various data such as measured values and set values. , And a timer (not shown).

  The control unit 31 determines that the first powdery or granular material to be weighed in the predetermined first powdery or granular material material of the different powdery or granular material does not reach the target measurement value, and other If the weighing process for powder or granular material remains, the process moves to the weighing process for other powder or granular material, while if the weighing process for other powder or granular material does not remain, one batch weighing process is completed. If the first weighing mode to be performed and the first powdery or granular material to be weighed in the weighing step of the first powdery or granular material is judged to be less than the target weighing value, a predetermined weighing abnormal process is performed. Mode and can be selectively executed.

  The first powder material is crushed by crushing molding by-products such as sprues, runners, burrs, etc. taken out from the molding machine 2 and separated from the molded product, and crushed materials such as defective molded products. However, the material is not limited to this, and may be an additive material that is not essential for compounding. Further, the first granular material is not limited to the first material to be weighed.

  In addition, as a determination that the first powder material is less than the target measurement value, the elapsed time (by a timer) when the first powder material weighing process is performed, the first powder material sensor 14 (see FIG. 1), but the present invention is not limited to this, and the determination may be made based on the rate of increase of the measured value of the first granular material material measured by the weighing machine 20.

  The material blending apparatus 1 is an apparatus capable of selectively executing the first weighing mode and the second weighing mode when the first powder material is less than the target weighing value. If the first powder material is not weighed below the predetermined level, it is determined that the target weight value is not reached. This will be described later in the description of FIGS. 5 and 6.

  Further, as shown in FIG. 2, the control unit 31 controls the valve cell drive unit 15 (first to fourth valves) included in the load cell (detection unit 22) and the supply unit 11 of the material supply machine 10 via a signal line or the like. Body drive parts 15A to 15D), the first powdery material material sensor 14 provided in the material supply device 10, the opening / closing mechanism of the weighing container 21, the drive part of the stirring blade 26, the material sensor provided in the mixing tank 25, and the like. It is connected to the control unit 31 via a signal line or the like.

  As the display operation unit 32, a display unit for displaying the state of the material blending system A, a blending state display, a tracking display, an abnormality notification, etc. on the screen, and an operation for changing various settings, a schedule, and performance data. It is configured to be integrated with an operation input unit 32 for performing an input operation and the like. The operation input unit 32 includes a mode selection unit 32a for selecting either the first weighing mode or the second weighing mode, a target value input unit 32b for receiving the input of one batch target amount, and different powders and granules. At least a mass ratio input unit 32c for receiving the input of the mass ratio of the material is provided.

  The one batch target amount is the total target amount of a plurality of powdery or granular materials including the first powdery or granular material, and the respective target measurement values are distributed and calculated at the input mass ratio. For example, the one batch target amount input by the target value input unit 32b is 500 g, and the values of the first, second, and third powdery or granular material input by the mass ratio input unit 32c are 3: 1 :. If it is 6, the target weight value of the first powder material is calculated to be 150 g, the target weight value of the second powder material is 50 g, and the target weight value of the third powder material is 300 g. (See FIG. 2 (b)).

  Further, as the data set and stored in the storage unit 33, for example, a maximum allowable time value for weighing up to the target weighing value and the like can be mentioned. It is set for each material such as the first time for the first granular material, the second to the fourth time for the second to fourth granular materials (hereinafter referred to as the nth time), and so on. It should be remembered.

  Next, an example of the basic operation by the control unit 31 of the material blending device 1 will be described with reference to the flowcharts shown in FIGS. 3, 4 (first example) and FIGS. 5 and 6 (second example). . In these two examples, the operation flows of the first weighing mode (FIGS. 3 and 5) and the second weighing mode (FIGS. 4 and 6) are shown. In these flowcharts, the operation flow is shown on the assumption that the weighing of the first granular material is followed by the weighing of another unmeasured granular material.

  3 and 4 are diagrams showing the basic operation of the first example of the material blending device 1 of the present embodiment. In this first example, when the preset first time elapses without the measured value of the first granular material reaches the target measured value, the first granular material becomes the target measured value. The control unit 31 determines that the amount is not satisfied. The first time is rewritably stored in the storage unit 33.

  The flowchart of FIG. 3 is an explanatory diagram showing an operation example of the first weighing mode in the first example, and will be described along with this flowchart.

First, the measurement of the first powder material is started (step S100).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, if the target weight value is reached before the first time set and stored is timed up, or if the time is up without reaching the target weight value, the weighing is ended (steps S101 to S103). ).

After the measurement of the first powdery or granular material is completed, the measurement of the other powdery or granular material which has not yet been measured is started (step S104).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, if the target weight value is reached before the n-th time that has been set and stored has timed up, the weighting of other powdery or granular material is terminated (steps S105, S106, S108).
If the measurement of all the other granular materials has been completed, this mode is terminated (YES in step S109), and if not finished (NO in step 109), the process returns to step S104 to proceed to the next granular material. Weigh the material.

  On the other hand, when the time is up without reaching the target measurement value (NO in step S105, YES in S106), the measurement abnormality process is executed (step S107), and this mode is ended.

  As the measurement abnormality processing, either or both of abnormality notification and measurement stop may be performed. In particular, when measuring other powdery or granular material, it is desirable to display the powdery or granular material so that it can be distinguished.

  The flowchart of FIG. 4 is an explanatory diagram showing an operation example of the second weighing mode in the first example, and will be described along with this flowchart.

First, the measurement of the first powder material is started (step S200).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the set and stored first time reaches the target measurement value before the time is up, the measurement of the first granular material is ended (steps S201 and S204).
On the other hand, when the time is up without reaching the target measurement value, the measurement abnormality process is executed (steps S201 to S203).

Further, when the measurement of the first powdery or granular material is normally completed (step S204), the measurement of the other powdery or granular material which has not yet been measured is started (step S205).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, if the target weight value is reached before the n-th time that has been set and stored has expired, the weighting of the other powdery or granular material is terminated (steps S206, S207, S209).
If the measurement of all the other granular materials has been completed, this mode is terminated (YES in step S210), and if not finished (NO in step 210), the process returns to step S205 to proceed to the next granular material. Weigh the material.

  On the other hand, if the time is up without reaching the target measurement value (NO in step S206, YES in S207), the measurement abnormality process is executed (step S208), and this mode is ended.

  The above-mentioned two weighing abnormality processing in the second weighing mode may be the same type of processing as that in the first weighing mode (step S107 in FIG. 3), but the weighing abnormality processing at the time of weighing the first granular material ( Regarding step S203), it is desirable that the abnormality in the measurement of the first granular material is clearly indicated.

  As described above, in the basic operation of the first example of the present embodiment, in the first weighing mode, even if the weighing of the first powdery or granular material is abnormal, another powdery or granular material is measured. On the other hand, in the second weighing mode, when the weighing of the first powdery or granular material becomes abnormal, the processing ends abnormally and the weighing of other powdery or granular material is not executed.

  Thus, in the first example, if the first powdery or granular material of the different powdery or granular materials is not an essential compounding target, the first weighing mode may be executed. The second weighing mode may be executed when a material is an essential compounding target, and either case can be selectively dealt with.

  In the first example shown in FIGS. 3 and 4, the timer is used to perform the process of determining whether or not the target measurement value of the first granular material has been reached, but as described above, the measurement is performed. The non-delivery may be determined based on the rate of increase (gradient in the measured value graph) of the measured value of the first powder or granular material measured by the machine 20.

  In other words, if the measurement of the first powder or granular material is not increasing smoothly, that is, if the rate of increase of the measurement value can be judged to be almost zero or not increasing, it is not reached (target measurement value). It is possible to judge that it is less than). Specifically, instead of each of step S102 in FIG. 3 and step S202 in FIG. 4, it may be determined whether or not the increase rate is reached. In addition, when measuring other powdery or granular material, the rate of increase of the measured value may be referred to instead of the timer.

  Next, the second example will be described. In this 2nd example, the 1st granular material material sensor 14 is used. That is, as long as the storage level of the storage container 12 for the first powder or granular material is lower than the predetermined level, the first powder or granular material can be obtained without time-up (see S123 in FIG. 5 and S223 in FIG. 6). The control unit 31 determines that is less than the target measurement value. It should be noted that the pulverized material sensor 3a (see FIG. 1) may be used instead of or in addition to the first powder material material sensor 14 to determine whether or not to start weighing.

  The flowchart of FIG. 5 is an explanatory diagram showing an operation example of the first weighing mode in the second example, and description will be given along this flowchart.

  First, before starting the measurement of the first powder or granular material, it is determined whether or not the first powder or granular material has a predetermined level or more (step S120). This determination is made by the detection of the first powder material sensor 14. That is, if the first powder or granular material sensor 14 detects that it is below the predetermined level, it is determined that the target measurement value is not reached, and the first powder or granular material The weighing itself is skipped (NO in step S120, the process proceeds to step S125).

If the first powder or granular material has a predetermined level or higher, the measurement of the first powder or granular material is started (step S121).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, if the target weight value is reached before the first time set and stored is timed up, or if the time is up without reaching the target weight value, the weighing is ended (steps S122 to S124). ).

After the measurement of the first powdery or granular material is completed, or when the measurement of the first powdery or granular material is skipped, the measurement of the other powdery or granular material which has not yet been measured is started (step S125). .
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, if the target weight value is reached before the n-th time that has been set and stored has timed up, the weighting of other powdery or granular material is terminated (steps S126, S127, S129).
If the weighing of all the other powdery or granular materials has been completed, this mode is terminated (YES in step S130), and if not finished (NO in step 130), the process returns to step S125 to proceed to the next powdery or granular material. Weigh the material.

  On the other hand, when the time is up without reaching the target measurement value (NO in step S126, YES in step S127), the measurement abnormality process is executed (step S128), and this mode ends.

  As the measurement abnormality processing, either or both of abnormality notification and measurement stop may be performed. In particular, when measuring other powdery or granular material, it is desirable to display the powdery or granular material so that it can be distinguished.

  The flowchart of FIG. 6 is an explanatory diagram showing an operation example of the second weighing mode in the second example, and description will be given along this flowchart.

  Also in the second weighing mode, first, before starting the weighing of the first powdery or granular material, it is determined whether or not the first powdery or granular material is at a predetermined level or more (step S220). This determination is made by the detection of the first powder material sensor 14. That is, if the first powder or granular material sensor 14 detects that it is below the predetermined level, it is determined that the target measurement value is not reached, and the first powder or granular material The weighing itself is skipped and the weighing abnormality processing is executed (NO in step S220, the process proceeds to step S224).

If the first powder or granular material has a predetermined level or higher, the measurement of the first powder or granular material is started (step S221).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the set and stored first time reaches the target measurement value by the time up, the measurement of the first granular material is ended (steps S222 and S225).
On the other hand, when the time is up without reaching the target measurement value, the measurement abnormality process is executed (steps S222 to S224). In addition, when the first powder or granular material sensor 14 detects that it is lower than the predetermined level, this measurement abnormality process is executed (NO in step S220, step S224).

When the weighing of the first powdery or granular material is normally completed (step S225), thereafter, the weighing of the other powdery or granular material which has not been weighed is started (step S226).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the set weight value reaches the target weight value before the n-th time is stored, the weighting of the other powdery or granular material is terminated (steps S227, S228, S230).
If the measurement of all other powdery or granular materials has been completed, this mode is ended (YES in step S231), and if not ended (NO in step 231), the process returns to step S226 and the powdery or granular material is finished. Perform the weighing process.

  On the other hand, if the time is up without reaching the target measurement value (NO in step S227, YES in step S228), abnormal measurement processing is executed (step S229), and this mode is ended.

  The above-described two weighing abnormality processing in the second weighing mode may be the same type of processing as that in the first weighing mode (step S128 in FIG. 5), but the weighing abnormality processing when weighing the first granular material ( Regarding step S224), it is desirable that the abnormality in the measurement of the first granular material is clearly indicated.

  As described above, in the basic operation of the second example of the present embodiment, in the first weighing mode, even if the weighing of the first powdery or granular material is abnormal, another powdery or granular material is measured. On the other hand, in the second weighing mode, when the weighing of the first powdery or granular material becomes abnormal, the processing ends abnormally and the weighing of other powdery or granular material is not executed.

  Thus, also in the second example, as in the first example, the first weighing mode may be executed when the first powdery or granular material of the different powdery or granular materials is not an essential blending target, When the first powdery or granular material is an essential compounding target, the second weighing mode may be executed, and either case can be selectively dealt with.

  Further, in the second example, the first powder or granular material sensor 14 is used to determine that the first powder or granular material does not reach the target measured value before the weighing is started. In the 1st weighing mode, the weighing of the 1st granular material can be skipped and the weighing of other granular materials can be continued. In the 2nd weighing mode, the weighing of the 1st granular material can be skipped and the abnormal measurement processing is performed. Can be executed. Therefore, the weighing time can be shortened.

  In the second example shown in FIG. 5 and FIG. 6 as well, non-delivery is determined based on the rate of increase (gradient in the measured value graph) of the measured value of the first granular material measured by the weighing machine 20. Good. Regarding the measurement of other powdery or granular material, the rate of increase of the measured value may be referred to instead of the timer.

  In both of the first example and the second example described above, when the first weighing mode is executed, the following other granular material materials are weighed without the weighing value reaching the target weighing value. Therefore, in that case, the actual one-batch measurement value deviates from the one-batch target measurement value. In order to correct this, the first powder or granular material is weighed first, and if the measured value is less than the target measured value, the target measured values of other powder or granular materials should be corrected. May be.

  Specifically, as shown in FIG. 2B, for example, the target weight value of the first powdery material is 150 g, the target weight value of the second powdery material is 50 g, and the third powdery material. Assume that the target weight of the material is 300 g. Under such a setting, when the weighing value of the first powdery or granular material is 80 g and the weighing is finished, the actual weighing value of 80 g is subtracted from the target batch amount of 500 g, which is the subtracted value. The remaining batch target amount is 420 g. Then, the target amount is redistributed based on the set mass ratio of the second and third powdery and granular materials of 1: 6, and the target measured value of the second powdery and granular material is 60 g and the third powdery and granular material. The target measured value of the granular material may be corrected to 360 g.

  As another case, in any of the first example and the second example described above, when the first weighing mode is executed and the weighing value of the first granular material is less than the target weighing value. Means that one batch weight value does not reach the target weight value and other subsequent granular material materials are weighed, but other granular material materials are weighed based on the initial set mass ratio. Good. In this case, the weighing order of the first granular material does not have to be the first.

  Specifically, as shown in FIG. 2B, for example, the target weight value of the first powdery material is 150 g, the target weight value of the second powdery material is 50 g, and the third powdery material. Assume that the target weight of the material is 300 g. Under such a setting, even when the weighing value of the first granular material is 80 g and the weighing is finished, the initial target amount for one batch is 500 g, and the first, second, and third batch target amounts are 500 g. Based on the set mass ratio of the powdery or granular material being 3: 1: 6, the target weighted value of the second powdery or granular material may be 50g and the target weighted value of the third powdery or granular material may be 300g. . If such a method is adopted, the first powdery or granular material does not have to come first in the weighing order.

  That is, the control unit 31 is configured to calculate the target measurement value of each granular material based on the mass ratio of each granular material and the one-batch target amount input via the operation input unit 32. In the 1 weighing mode, the first powder / granular material is weighed first, and if the measured value of the 1st powder / granular material is less than the target measured value, the 1st batch target amount is changed to the 1st powder It is recommended to recalculate the target measured value of the remaining powdery or granular material based on the remaining batch target amount obtained by subtracting the measured value of the powdery material and the mass ratio of the remaining powdery or granular material. Good. When the measured value of the first powder or granular material is less than the target measured value, the total of the measured values of the one batch target amount is not taken into consideration, and other powders remaining based on the initial mass ratio of the granular material are used. It is also possible to calculate the target measurement value of the granular material. In this case, the metering sequence does not have to be from the first granular material.

DESCRIPTION OF SYMBOLS 1 Material blending apparatus 10 Material supply machine 14 1st granular material sensor 20 Measuring machine 22 Detection part (load cell)
30 control panel device 31 control unit 32 display operation unit (operation input unit)
32a Mode selection unit 32b Target amount input unit 32c Mass ratio input unit 33 Storage unit

Claims (5)

Material feeders that store different granular material materials and supply them toward the downstream side, a weighing machine that stores and weighs each granular material material supplied from these material feeders, and the different granular materials Each of the material feeder is controlled so as to have a preset target measurement value for each body material, and a control unit that sequentially supplies each powdery or granular material toward the weighing machine is provided,
The control unit determines that the first powdery or granular material to be weighed in the weighing step of the predetermined first powdery or granular material of the different powdery or granular material does not reach the target measurement value, If the weighing process for other powdery or granular material remains, the process moves to the weighing process for other powdery or granular material, or if there is no weighing process for other powdery granular material, one batch weighing process And a first weighing mode for completing the above, and if it is determined that the first powdery or granular material to be weighed in the weighing step of the first powdery or granular material does not reach the target weighing value, a predetermined weighing abnormality process is performed. A material blending device characterized in that a second weighing mode to be performed can be selectively executed. In claim 1,
In the weighing step of the first powdery or granular material, the control unit is configured such that if the preset first time elapses without the measured value of the first powdery or granular material reaching the target weighing value. A material blending device, characterized in that the first powder material is judged to be less than a target measurement value. In claim 1 or 2,
The control unit determines that the first powdery or granular material is less than a target measurement value if the storage level of the container storing the first powdery or granular material is below a predetermined level. Material blending equipment. In any one of Claim 1 thru | or 3,
The material blending device, wherein the control unit executes abnormality notification and measurement stoppage as the predetermined measurement abnormality processing in the second measurement mode. In any one of Claim 1 thru | or 4,
It is provided with an operation input unit that receives an input of the mass ratio of the different granular materials and the target amount of one batch,
The control unit is configured to calculate a target measurement value of each granular material based on the mass ratio of each granular material and the one batch target amount input via the operation input unit, and the first unit In the weighing mode, the first powder / granular material is weighed first, and when the weighing value of the first powder / granular material is less than the target weighing value, the Recalculate the remaining batch target amount obtained by subtracting the measured value of the granular material of No. 1 and the target measured value of the other residual granular material based on the mass ratio of the remaining residual granular material. A material blending device characterized by:

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