JP7144842B2 - Material mixing equipment - Google Patents

Description

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

2. Description of the Related Art Conventionally, there has been known a material blending device that weighs and blends a plurality of types of powdery or granular material with a weighing machine so as to achieve a predetermined blending ratio (mass ratio). In addition to the main material and various additives, such a material blending device requires molding by-products such as sprues, runners, and burrs that are taken out from the molding machine and separated from the molded product, and crushed materials such as defective molding products. In some cases, a pulverized material obtained by pulverizing is blended. Since such pulverized material is formed according to the operation of the molding machine, there are problems such as not being able to measure the predetermined amount due to insufficient storage of the pulverized material in the container, or delaying preparation for molding. rice field.

For example, in Patent Document 1 below, each raw material supplied from four raw material hoppers (material feeders) that store the main material, pulverized material, masterbatch material, and additive material is weighed so as to have a predetermined mixing ratio. Disclosed is a material blending device configured to weigh in a hopper. In addition, in this material blending device, when weighing the pulverized material, if the weighing is completed within a certain period of time from the start of the supply of the pulverized material, the target amount of the pulverized material in the next batch operation is multi-blended. On the other hand, if a certain period of time elapses before the weighing of the pulverized material is completed, the target amount of the pulverized material in the next batch operation is set to a small compounding amount.

JP 2012-176599 A

However, in the material blending apparatus described in Patent Document 1, for example, even if there is no pulverized material in the raw material hopper at the initial stage of molding or when the molding machine is temporarily stopped, such pulverization as described above can be performed. The target amount of material is adjusted and the batch operation is completed. For this reason, when it is essential to add a pulverized material, it becomes difficult to deal with it, and further improvement is desired.

The present invention has been made in view of the above-mentioned circumstances, and the case where a predetermined first powdery or granular material among different powdery or granular materials is not an essential blending target or when it is an essential blending target. It is an object of the present invention to provide a material blending device capable of selectively coping with any of them.

In order to achieve the above object, the material blending apparatus of the present invention includes a material feeder that stores different powdery or granular materials and feeds them toward the downstream side; A weighing machine for containing and weighing a body material, and the material feeder are controlled so as to achieve a target weighing value preset for each of the different powdery or granular materials, and each powder or grain is directed toward the weighing machine. a control unit for sequentially supplying the body materials, wherein the control unit controls the first powder or grain material weighed in a weighing step of a predetermined first powder or grain material among the different powder or grain materials; If it is determined that the powdery or granular material does not meet the target weighing value, and the weighing process for other powdery or granular material remains, the other powdery or granular material is shifted to the weighing process, while the other powdery or granular material If the material weighing process does not remain, a first weighing mode for completing the one-batch weighing process, and the first powdery or granular material weighed in the first powdery or granular material weighing process is set to the target weighing. If it is determined that the value is not satisfied, a second weighing mode in which predetermined weighing abnormality processing is performed can be selectively executed . If a predetermined first time elapses without the weighed value of the first powdery or granular material reaching the target weighed value, it is determined that the first powdery or granular material does not reach the target weighed value. characterized by
Another material blending apparatus of the present invention includes a material feeder that stores different powdery or granular materials and feeds them toward the downstream side; The weighing machine and the material feeder are controlled so that each of the different powdery or granular materials has a preset target weighing value, and each powdery or granular material is sequentially supplied toward the weighing machine. and a control unit, wherein the control unit measures the first powdery or granular material weighed in the weighing step of a predetermined first powdery or granular material among the different powdery or granular materials as a target. If it is determined that the weighed value is not satisfied and the weighing process for other powdery or granular material remains, the process shifts to the weighing process for other powdery or granular material, while the weighing process for other powdery or granular material remains. If not, it is determined that the first powdery or granular material weighed in the first weighing mode for completing the one batch weighing process and the weighing process for the first powdery or granular material does not meet the target weighing value. Then, a second weighing mode in which predetermined weighing abnormality processing is performed can be selectively executed. If so, it is determined that the first granular material does not meet the target weighed value.
Still another material blending apparatus of the present invention includes material feeders that respectively store different powdery or granular materials and supply them toward the downstream side, and the powdery or granular materials supplied from these material feeders. Controlling each of the weighing machine for weighing and the material feeder so as to obtain a target weighing value set in advance for each of the different powdery or granular materials, and sequentially supplying each of the powdery or granular materials toward the weighing machine. and a control unit that causes the first powdery or granular material to be weighed in the step of weighing a predetermined first powdery or granular material among the different powdery or granular materials If it is determined that the target weighing value is not reached and the weighing process for other powdery or granular materials remains, the process shifts to the weighing process for other powdery or granular materials, while the weighing process for other powdery or granular materials continues If not, the first powdery or granular material weighed in the first weighing mode for completing the one batch weighing step and the weighing step for the first powdery or granular material does not meet the target weighing value. If it is determined, a second weighing mode in which predetermined weighing abnormality processing is performed can be selectively executed, and the control unit, in the weighing step of the first powdery or granular material, controls the first powdery grain If the weighed value of the body material does not reach the target weighed value and the rate of increase of the weighed value of the first powdery or granular material is almost zero or is within a numerical range where it can be determined that it has not increased, the first It is determined that the amount of powdered or granular material is less than the target weight

Since the material blending apparatus of the present invention is configured as described above, when the predetermined first powdery or granular material among the different powdery or granular materials is not required to be blended or when it is required to be blended can be selectively handled.

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; FIG. (a) is a basic block diagram of the main part of the material mixing apparatus, and (b) is a diagram for explaining correction of a target weighing value . 4 is a flow chart showing the basic operation of the first weighing mode in the first example of the same material blending device. It is a flowchart which shows the basic operation|movement of the 2nd weighing mode in the 1st example of the same material mixing apparatus. It is a flowchart which shows the basic operation|movement of the 1st measurement mode in the 2nd example of the same material mixing apparatus. It is a flowchart which shows the basic operation|movement of the 2nd weighing mode in the 2nd example of the same material mixing apparatus.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, referring to the system diagram of FIG. 1, a schematic configuration of a material blending system A including this material blending device 1 and its peripheral devices will be described.

The material blending apparatus 1 includes a material feeder 10 that stores different powdery or granular materials and supplies them toward the downstream side, and stores and weighs the powdery or granular materials supplied from these material feeders 10. Control each of the weighing machine 20 and the material feeder 10 so that the target weighing value set in advance for each different powdery or granular material is obtained, and control to sequentially supply each powdery or granular material toward the weighing machine 20. a portion 31;

The material supplier 10 includes a storage container 12 that stores the powdery or granular material, and a supply unit 11 that supplies the powdery or granular material toward the weighing machine 20 to which the powdery or granular material is supplied. In this embodiment, the material feeder 10 is configured to feed the granular material to a weighing machine 20 (measuring container 21) installed on the lower side so as to achieve a predetermined weighing target value. . A specific configuration of the material supplier 10 will be described later.

Here, the powdery or granular materials refer to materials in the form of powder or granules, but include materials in the form of microflakes, short fiber flakes, sliver-like materials, and the like. Moreover, as the above material, any kind of material such as synthetic resin materials such as resin pellets and resin fiber pieces, metal materials, semiconductor materials, wood materials, chemical materials, and food materials may be used. Examples of the powdery material include natural material (virgin material), pulverized material, masterbatch material, various additives, and the like in the case of molding a synthetic resin molded product. Moreover, it is good also as a structure containing reinforcing fibers, such as a glass fiber and a carbon fiber.

In this embodiment, a plurality of material feeders 10 corresponding to a plurality of different types of powdery or granular materials are used to mix a plurality of types of powdery or granular materials in a predetermined mixing ratio (mass ratio). 1.

This material blending system A comprises a plurality of material feeders 10 (10A, 10B, 10C, 10D) each storing different powdery or granular materials, and each powdery or granular material supplied from these material feeders 10. and a weighing machine 20 for receiving and weighing. The figure shows an example in which four material feeders 10 are provided. These four material feeders 10 are a first material feeder 10A that feeds pulverized material, a second material feeder 10B that feeds a natural material as a main material, a third material feeder 10C that feeds a masterbatch material, and a It may constitute the fourth material feeder 10D that feeds the additive. The first material supplier 10A, the second material supplier 10B, the third material supplier 10C, and the fourth material supplier 10D will be simply referred to as the material supplier 10 when it is not necessary to distinguish them.

Further, the first material feeder 10A is provided with a first particulate material sensor 14 for detecting the lower limit level of the first particulate material (pulverized material) in the material feeder 10 . The first particulate material sensor 14 will be described later with reference to FIGS. 2, 5 and 6. FIG.

The material blending system A also includes a mixing tank 25 in which a stirring blade 26 for mixing the granular material weighed and discharged by the weighing machine 20 is rotatably arranged. The drawing shows an example in which the weighing machine 20 (measuring container 21) and the mixing tank 25 (stirring blade 26) are provided in a unitized casing 23. As shown in FIG. An appropriate holding portion for holding the storage container 12 of each material supplier 10 is provided at the upper end portion of the casing 23 .

The weighing machine 20 includes a weighing container 21 and a detection unit 22 composed of a mass detector such as a load cell, which are held in a casing 23 . In addition, the upper end side of the weighing container 21 is provided with an inlet opening upward. The input port of this weighing container 21 is provided so as to be able to receive each granular material supplied from each material supplier 10 on the upstream side (upper side). In addition, the lower end side of the weighing container 21 is provided with a discharge port that opens downward and an opening/closing mechanism that opens and closes the discharge port. In the figure, an example is shown in which a cover is provided as an opening/closing mechanism that moves obliquely upward in a pendulum shape to open the discharge port.

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 an arm-shaped support portion that rotates around the rotation axis on the side of the weighing container 21. A flap-shaped valve body may be used, or other various configurations may be used.

The stirring blade 26 is provided so as to be positioned on the lower side of the measuring container 21, and is rotated by an appropriate driving section. The granular material mixed in the mixing tank 25 provided with the stirring blades 26 is supplied toward the molding machine 2 as the supply destination of the material blending system A. As shown in FIG. The drawing 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 synthetic resin molded products, but may also be an injection molding machine for other materials, an extrusion molding machine for various materials, a compression molding machine, or the like. Other molding machines may be used. Moreover, 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. Further, the granular material mixed in the mixing tank 25 is not limited to the mode in which it is supplied to the molding machine 2 as a supply destination in a dripping manner, and the It may be pneumatically transported to the supply destination. In this case, instead of installing the casing 23 on the molding machine 2, it may be supported by an appropriate frame or stand.

In addition, in the example of the drawing, an example in which the material blending system A is provided with a pneumatic conveyer 4 for pneumatically conveying the granular material from the material source 3 toward each material supplier 10 is shown. In the illustrated example, a first material source 3A connected to a first material supplier 10A via a material transport pipeline, and a second material source 3B connected to a second material supplier 10B via a material transport pipeline. and a third material source 3C connected to the third material supplier 10C via a material transport pipeline, and a fourth material source 3D connected to the fourth material supplier 10D via a material transport pipeline. An example provided as a material source 3 is shown. The first material source 3A, the second material source 3B, the third material source 3C, and the fourth material source 3D will be simply referred to as the material source 3 when it is not necessary to distinguish them.

Further, in the example of the drawing, an example in which the second material element 3B, the third material element 3C, and the fourth material element 3D are tank-shaped is shown. Further, there is an example in which the first material source 3A is a pulverizer that pulverizes molding by-products such as sprues, runners, and burrs that are taken out from the molding machine 2 and separated from the molded products, and materials to be pulverized such as defective molding products. showing. The first material source 3A is also provided with a pulverized material sensor 3a for detecting the storage level of the granular material. The material to be pulverized may be fed into the feeding hopper of the pulverizer by an appropriate molding by-product take-out device or conveying means such as a belt conveyor.

The material transport pipelines connected to these material sources 3 are connected to a hopper-like collecting section 13 provided at the upper end of the storage container 12 of each material supplier 10 . An air suction pipe line connected to the pneumatic transporter 4 is connected to these collection units 13 . In addition, these collection units 13 are provided with separation units for separating the powdery or granular material from the transport air directed to the air suction pipe. Any separation unit may be used as long as it can separate the granule material and the transport air. It may be a punching metal, a mesh-like perforated plate-like body, or the like, which blocks the passage of the gas, or an umbrella-like one. In addition, it is possible to employ separation units having various configurations. The separation mechanism of the collection unit 13 may be of a so-called cyclone type structure that separates the particulate material from the transport air.

The air suction pipelines connected to these collection units 13 are connected to the pneumatic transporter 4 via transport air switching valves 5 . The transport air switching valve 5 is configured to be switched so as to connect any one of a plurality of air suction ducts to the suction side of the air transporter 4 . The pneumatic transporter 4 is provided with an appropriate dust collector such as a bag filter and a cyclone filter, and a suction blower constituting a transportation air source.

The material blending system A also includes a control panel device 30 having a control unit 31 including a CPU and programs for controlling each part of the material blending system A. As shown in FIG. The control panel device 30 may be provided at an appropriate location of the material blending system A, for example, attached to the casing 23 or the pneumatic transporter 4, or may be provided at a separate location. Details of the configuration of the control panel device 30 and the operation of the control section 31 will be described later in the description of FIG. 2 and the like.

In the material blending system A configured as described above, there is a transport mode for pneumatically transporting the powdery or granular material from the material source 3 toward the material supplier 10, a weighing mode in the weighing container 21, and a mixing tank 25. A mixed mode is performed.

In the transport mode, if the material sensor of the material supplier 10 outputs a material request signal, the air suction pipe line connected to the collection unit 13 of the material supplier 10 and the pneumatic transporter 4 are communicated. , the transport air switching valve 5 is switched to activate the transport air source of the air transporter 4 . Thereby, the granular material is transported from the material source 3 to the material supplier 10 . In addition, when the material request signal is output from the material sensor of a plurality (all) of the material feeders 10 at the initial stage of operation of the material blending system A, each material feeder 10 according to the preset priority etc. , the transportation mode may be executed sequentially.

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

In the weighing mode, each feed unit 11 of each material feeder 10 is controlled so as to obtain a preset target weighing value for each different powder material, and each powder toward the weighing container 21 is fed. One batch weighing may be performed by supplying materials sequentially. The target weighed value for each powdery or granular material may be calculated and set based on the one-batch target amount and the mass ratio for each powdery or granular material.

When the weighing container 21 contains one batch of powdered material and the material sensor of the mixing tank 25 outputs a material request signal, the outlet of the weighing container 21 is opened to direct the powder toward the mixing tank 25. It may be discharged and the mixing mode may be performed by rotating the stirring blades 26 . Further, when the weighing container 21 becomes empty, the weighing mode is executed, and the weighing container 21 is made to contain one batch of weighed powder material until a material request signal is output from the material sensor of the mixing tank 25. You can leave it.

After the powdery or granular materials are mixed in the mixing tank 25 as described above, the molding machine 2 performs molding preparation processes such as dummy shots and test shots as appropriate, and shifts to a steady operation process in which molding processes are sequentially performed. do. Further, the material to be pulverized generated in the molding machine 2 is appropriately pulverized in the pulverizer constituting the first material source 3A. Similarly, when 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 when the measuring container 21 becomes empty, the measuring mode is executed. Run. Further, when a material request signal is output from the material sensor of each material supplier 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 mode described above, and various modifications are possible.

In addition, the mode of pneumatically conveying the powdery or granular material from the material source 3 toward the collecting unit 13 is not limited to the suction transportation as described above. A configuration in which the granular material is pumped toward the collecting portion 13 may be adopted. In this case, an exhaust pipe provided with an appropriate dust collecting portion may be connected to the collecting portion 13 . In addition, the mode of supplying (replenishing) the powdery or granular material to each material feeder 10 is not limited to the mode of pneumatic transportation, and may be a mode of supplying (replenishing) by dropping by its own weight from the upstream side (upper side). , or may be done by an operator.

Further, instead of providing a supply unit 11 described later in each of the plurality of material supply devices 10, at least one of the material supply units 10 is provided with a supply unit 11, and the other material supply units are provided with other supply units. good too. Such other feeder may be a slide shutter, a screw feeder, a vibrating feeder, a mass feeder, a rotary feeder, a table feeder, or the like.

Further, in the above-described example, the casing 23 is provided with the mixing tank 25, but instead of such an aspect, another mixing mechanism may be provided. For example, it is also possible to adopt a mode in which the powdered or granular materials weighed and blended in the weighing container 21 are pneumatically transported to a collection section (not shown) of the molding machine and mixed in the collection section. The specific configuration of each member and each part incorporated in the material blending system A is not limited to the configuration described above, and various other 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 section 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 this system, and a storage unit 33 for storing various data such as measurement values and set values. , and a timer (not shown).

The control unit 31 determines that the first powdery or granular material weighed in the weighing step for a predetermined first powdery or granular material out of different powdery or granular materials does not meet the target weighing value, If the weighing process of the powdery or granular material remains, the process shifts to the weighing process of another powdery or granular material, and if the weighing process of the other powdery or granular material does not remain, the one-batch weighing process is completed. If it is determined that the first powdery or granular material weighed in the weighing step of the first powdery or granular material does not meet the target weighing value, a second weighing mode that performs predetermined weighing abnormality processing and can be selectively executed.

As the first granular material, molding by-products such as sprues, runners, and burrs taken out from the molding machine 2 and separated from the molded product, and pulverized materials obtained by pulverizing materials to be pulverized such as defective molding products. However, it is not limited to this, and may be an additive that is not essential to be blended. Also, the first granular material is not limited to the first weighed material.

In addition, as a determination that the first powdery or granular material does not meet the target weighing value, the elapsed time (by a timer) during the execution of the weighing process of the first powdery or granular material, or the first powdery or granular material sensor 14 (see FIG. 1), but it is not limited to these, and may be determined based on the increase rate of the weighed value of the first granular material weighed by the weighing machine 20 or the like.

The material blending apparatus 1 is an apparatus capable of selectively executing the first weighing mode and the second weighing mode when the first granular material does not reach the target weighing value. It should be noted that if the first granular material is not weighed because it falls below the predetermined level, it is determined that the target weighed value is not reached. This will be described later in the description of FIGS. 5 and 6. FIG.

Further, as shown in FIG. 2, the control unit 31 controls the load cell (detection unit 22), the valve body drive unit 15 (first to fourth valves body driving units 15A to 15D), the first granular material sensor 14 provided in the material feeder 10, the opening and closing mechanism of the measuring container 21, the driving unit of the stirring blade 26, the material sensor provided in the mixing tank 25, etc. It is connected to the control unit 31 via a signal line or the like.

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

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 weighed values are distributed and calculated according to the input mass ratio. For example, the 1-batch target amount input by the target value input unit 32b is 500 g, and the values of the first, second, and third granular materials input by the mass ratio input unit 32c are 3:1:1. If it is 6, the target weighed value of the first granular material is calculated to be 150 g, the target weighed value of the second granular material is calculated to be 50 g, and the target weighed value of the third granular material is calculated to be 300 g. (See FIG. 2(b)).

Data set and stored in the storage unit 33 include, for example, a maximum allowable time value for weighing up to a target weighing value. Set for each material such as the first time for the first granular material, the second to fourth time for the second to fourth granular materials (hereinafter referred to as n-th time), etc. It should be memorized.

Next, an example of the basic operation of the control unit 31 of the material blending apparatus 1 will be described with reference to the flowcharts shown in FIGS. 3 and 4 (first example) and FIGS. 5 and 6 (second example). . These two examples respectively show the flow of operations in the first weighing mode (FIGS. 3 and 5) and the second weighing mode (FIGS. 4 and 6). These flow charts show the operational flow assuming that the weighing of the first particulate material is followed by the weighing of other unweighed particulate materials.

FIG.3 and FIG.4 is a figure which shows the basic operation|movement of the 1st example of the material mixing apparatus 1 of this embodiment. In this first example, if a preset first time elapses without the weighed value of the first powdery or granular material reaching the target weighed value, the first powdery or granular material reaches the target weighed value. The controller 31 judges that it does not meet the requirements. This 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 description will be made along this flowchart.

First, the weighing of the first granular material is started (step S100).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the target weighing value is reached before the set and stored first time expires, or when the time expires without reaching the target weighing value, the weighing is terminated (steps S101 to S103). ).

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

On the other hand, if the time is up without reaching the target weighing value (NO in step S105, YES in step S106), weighing abnormality processing is executed (step S107), and this mode ends.

As the weighing abnormality processing, both or one of abnormality notification and weighing stop may be performed. In particular, when weighing other powdery or granular materials, it is desirable to provide a display that allows identification of which powdery or granular material is being used.

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

First, the weighing of the first granular material is started (step S200).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the target weighed value is reached before the set and stored first time expires, the weighing of the first granular material is finished (steps S201 and S204).
On the other hand, if the target weighing value is not reached and the time is up, weighing abnormality processing is executed (steps S201 to S203).

Also, when the weighing of the first powdery or granular material is normally completed (step S204), the weighing of other powdery or granular materials that have not yet been weighed is then started (step S205).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the target weighed value is reached before the set and stored n-th time expires, the weighing of other powdery or grain materials is finished (steps S206, S207, S209).
If the weighing of all the other powdery or granular materials has been completed, this mode is terminated (YES in step S210), and if not (NO in step S210), the process returns to step S205 and the next powdery or granular material is weighed. Perform material weighing process.

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

The above two weighing abnormality processes in the second weighing mode may be the same kind of processes as those in the first weighing mode (step S107 in FIG. 3), but the weighing abnormality process ( As for step S203), it is desirable to clearly indicate that there is an abnormality in the weighing of the first granular material.

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

In other words, in the first example, when the first powdery or granular material among the different powdery or granular materials is not the essential blending target, the first weighing mode may be executed. The second weighing mode may be executed when the material is an essential compounding target, and either case can be selectively handled.

In the first example shown in FIGS. 3 and 4, a timer is used to determine whether the first granular material reaches or fails to reach the target weighing value. Non-delivery may be determined based on the rate of increase in the weighed value of the first granular material weighed by the machine 20 (slope in the weighed value graph).

That is, if the weighing of the first powdery or granular material does not rise smoothly, that is, if the rate of increase of the weighing value is almost zero or within a numerical range where it can be determined that it has not increased, it is not achieved (target weighing value less than )). Specifically, instead of step S102 in FIG. 3 and step S202 in FIG. It should be noted that the rate of increase of the weighed value may be referred to instead of the timer for the weighing of other granular material.

Next, a second example will be explained. In this second example, the first particulate material sensor 14 is used. That is, if the storage level of the storage container 12 of the first powdery or granular material is below a predetermined level, the first powdery or granular material can be stored even if the time does not expire (see S123 in FIG. 5 and S223 in FIG. 6). is less than the target weighing value. Instead of or in addition to the first granular material sensor 14, the pulverized material sensor 3a (see FIG. 1) may be used to determine whether 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 made along this flowchart.

First, before starting weighing of the first granular material, it is determined whether or not the first granular material is at or above a predetermined level (step S120). This determination is made by detection by the first granular material sensor 14 . In other words, when the first powdery or granular material sensor 14 detects that it is below the predetermined level, it is determined that the target weighed value is not reached, and the weighing of the first powdery or granular material is not started. This skips the weighing itself (NO in step S120, proceeds to step S125).

Also, if the first granular material is equal to or higher than the predetermined level, weighing of the first granular material is started (step S121).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the target weighing value is reached before the set and stored first time expires, or when the time expires without reaching the target weighing value, the weighing is terminated (steps S122 to S124). ).

After the weighing of the first powdery or granular material is completed, or when the weighing of the first powdery or granular material is skipped, the weighing of other powdery or granular materials that have not yet been weighed is started (step S125). .
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the target weighed value is reached before the set and stored n-th time expires, the weighing of other powdery or grain materials is finished (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 (NO in step S130), the process returns to step S125, and the next powdery or granular material is weighed. Perform material weighing process.

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

As the weighing abnormality processing, both or one of abnormality notification and weighing stop may be performed. In particular, when weighing other powdery or granular materials, it is desirable to provide a display that allows identification of which powdery or granular material is being used.

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 made along this flowchart.

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

Also, if the first granular material is equal to or higher than the predetermined level, weighing of the first granular material is started (step S221).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the target weighed value is reached before the set and stored first time expires, the weighing of the first granular material is terminated (steps S222 and S225).
On the other hand, if the time is up without reaching the target weighing value, weighing abnormality processing is executed (steps S222 to S224). Also, when it is detected that the first powdery material sensor 14 is below the predetermined level, this weighing abnormality processing is executed (NO in step S220, step S224).

Also, when the weighing of the first powdery or granular material is normally completed (step S225), the weighing of other powdery or granular materials that have not yet been weighed is then started (step S226).
Next, the weighing up to the target weighing value is monitored using a timer. Specifically, when the target weighed value is reached before the set and stored n-th time expires, the weighing of other powdery or granular materials is terminated (steps S227, S228, S230).
If the weighing of all other powdery or granular materials has been completed, this mode is ended (YES in step S231), and if not (NO in step S231), the process returns to step S226 to Weighing processing is performed.

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

The two weighing abnormality processes in the second weighing mode may be the same kind of processes as those in the first weighing mode (step S128 in FIG. 5), but the weighing abnormality process ( As for step S224), it is desirable to clearly indicate that there is an abnormality in the weighing of the first granular material.

As described above, the basic operation of the second example of the present embodiment is that, in the first weighing mode, even if the weighing of the first granular material becomes abnormal, the weighing of other granular materials is executed. On the other hand, in the second weighing mode, if the weighing of the first granular material becomes abnormal, the process ends abnormally and the weighing of other granular materials is not executed.

In other words, in the second example, as in the first example, if the first powdery or granular material among the different powdery or granular materials is not required to be blended, the first weighing mode may be executed. The second weighing mode may be executed when the first powdery or granular material is an essential compounding target, and either case can be selectively handled.

Further, in the second example, the first granular material sensor 14 is used to determine that the first granular material is less than the target weighed value before starting weighing. In the first weighing mode, weighing of the first granular material can be skipped and weighing of other granular materials can be continued, and in the second weighing mode, weighing of the first granular material can be skipped and weighing abnormality processing can be performed. can be executed. Therefore, the weighing time can be shortened.

In the second example shown in FIGS. 5 and 6 as well, non-delivery is determined based on the rate of increase in the weighed value of the first granular material weighed by the weighing machine 20 (slope in the weighed value graph). good too. For the weighing of other granular material, the rate of increase of the weighed value may be referred to instead of the timer.

In both the first example and the second example described above, when the first weighing mode is executed, the weighing value does not reach the target weighing value, and other subsequent powdery or granular materials cannot be weighed. Therefore, in that case, the actual 1-batch metric value deviates from the 1-batch target metric value. In order to correct this, weigh the first powdery or granular material first, and if the measured value is less than the target weighted value, correct the target weighted values of the other powdery or granular materials. may

Specifically, for example, as shown in FIG. Assume that the target weight of material is 300 g. Under these settings, when the weighed value of the first granular material is 80 g and the weighing is completed, the actual weighed value of 80 g is subtracted from the target amount of 1 batch of 500 g, and the subtraction value is 420 g is the remaining batch target amount. Then, the target amount is redistributed based on the set mass ratio of 1:6 for the second and third granular materials, and the target weighed value for the second granular material is 60 g, and the third powder The target weighing value of the granular material should be corrected to 360 g.

As another case, in both the first example and the second example described above, when the first weighing mode is executed and the weighed value of the first granular material is less than the target weighed value, , the weighing value of one batch does not reach the target weighing value, and other subsequent powdery or granular materials are weighed. good. In this case, the weighing order of the first granular material need not be the first.

Specifically, for example, as shown in FIG. Assume that the target weight of material is 300 g. Under these settings, even if the weighing value of the first granular material is 80 g and the weighing ends, the initial batch target amount is 500 g, and the first, second, and third Based on the set mass ratio of the powdery or granular material being 3:1:6, the target weight of the second powdery or granular material of 50 g and the target weight of the third powdery or granular material of 300g may remain unchanged. . If such a method is adopted, the weighing order does not have to be the first granular material.

That is, the control unit 31 is configured to calculate the target weighed value of each powdery or granular material based on the mass ratio of each powdery or granular material and the one-batch target amount input via the operation input unit 32. In the 1 weighing mode, the first powdery or granular material is weighed first, and when the weighed value of the first powdery or granular material is less than the target weighed value, the 1 batch target amount to the first powdery grain Recalculate the target weighing value of the remaining powdery or granular material based on the remaining batch target amount obtained by subtracting the weighing value of the bulk material and the mass ratio of the other remaining powdery or granular material. Just do it. Also, if the weighed value of the first powdery or granular material is less than the target weighed value, the total weighed value of the target amount of one batch is not considered, and other powders remaining based on the mass ratio of the original powdery or granular material It is also possible to calculate a target weight value for the granular material. In this case, the weighing order does not have to start from the first granular material.

Reference Signs List 1 material blending device 10 material feeder 14 first granular material sensor 20 weighing machine 22 detector (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 (6)

A material feeder that stores different powdery or granular materials and feeds them toward the downstream side, a weighing machine that stores and weighs each of the powdery or granular materials supplied from these material feeders, and the different powdery grains. a control unit that controls each of the material feeders so that a target weighing value preset for each body material is obtained, and sequentially feeds each powdery or granular material toward the weighing machine;
The control unit determines that the first powdery or granular material weighed in a step of weighing a predetermined first powdery or granular material among the different powdery or granular materials does not meet a target weighing value, If the weighing process of another powdery or granular material remains, the process shifts to the weighing process of another powdery or granular material, and if the weighing process of any other powdery or granular material does not remain, the one-batch weighing process is performed. and when it is determined that the first powdery or granular material weighed in the weighing step of the first powdery or granular material does not meet the target weighing value, predetermined weighing abnormality processing is performed. and a second weighing mode to be selectively executed ,
In the step of weighing the first powdery or granular material, if a predetermined first time elapses without the weighed value of the first powdery or granular material reaching the target weighed value, the control unit and determining that the first granular material does not meet the target weighing value . A material feeder that stores different powdery or granular materials and feeds them toward the downstream side, a weighing machine that stores and weighs each of the powdery or granular materials supplied from these material feeders, and the different powdery grains. a control unit that controls each of the material feeders so that a target weighing value preset for each body material is obtained, and sequentially feeds each powdery or granular material toward the weighing machine;
The control unit determines that the first powdery or granular material weighed in a step of weighing a predetermined first powdery or granular material among the different powdery or granular materials does not meet a target weighing value, If the weighing process of another powdery or granular material remains, the process shifts to the weighing process of another powdery or granular material, and if the weighing process of any other powdery or granular material does not remain, the one-batch weighing process is performed. and when it is determined that the first powdery or granular material weighed in the weighing step of the first powdery or granular material does not meet the target weighing value, predetermined weighing abnormality processing is performed. and a second weighing mode to be selectively executed,
The control unit determines that the first powdery or granular material does not meet the target measurement value if the storage level of the container that stores the first powdery or granular material is below a predetermined level. material blending device. A material feeder that stores different powdery or granular materials and feeds them toward the downstream side, a weighing machine that stores and weighs each of the powdery or granular materials supplied from these material feeders, and the different powdery grains. a control unit that controls each of the material feeders so that a target weighing value preset for each body material is obtained, and sequentially feeds each powdery or granular material toward the weighing machine;
The control unit determines that the first powdery or granular material weighed in a step of weighing a predetermined first powdery or granular material among the different powdery or granular materials does not meet a target weighing value, If the weighing process of another powdery or granular material remains, the process shifts to the weighing process of another powdery or granular material, and if the weighing process of any other powdery or granular material does not remain, the one-batch weighing process is performed. and when it is determined that the first powdery or granular material weighed in the weighing step of the first powdery or granular material does not meet the target weighing value, predetermined weighing abnormality processing is performed. and a second weighing mode to be selectively executed,
In the step of weighing the first powdery or granular material, the control unit prevents the weighed value of the first powdery or granular material from reaching a target weighing value, and weighs the first powdery or granular material. A material blending apparatus characterized in that it is determined that the first powdery or granular material does not meet the target weighed value if the increase rate of the value is substantially zero or within a numerical range where it can be determined that there is no increase . In any one of claims 1 to 3,
The material blending apparatus, wherein the control unit executes abnormality notification and weighing stop as predetermined weighing abnormality processing in the second weighing mode. In any one of claims 1 to 4,
An operation input unit that receives input of the mass ratio of the different powdery or granular materials and the target amount of one batch,
The control unit is configured to calculate a target weighed value of each powdery or granular material based on a mass ratio of each powdery or granular material and a target amount of one batch input via the operation input unit, and the first In the weighing mode, the first powdery or granular material is weighed first, and when the weighed value of the first powdery or granular material is less than the target weighed value, the one batch target amount is changed to the first batch target amount. Recalculate the target weighing value of the other remaining powdery or granular material based on the remaining batch target amount obtained by subtracting the weighing value of 1 powdery or granular material and the mass ratio of the other remaining powdery or granular material A material blending device characterized by: In any one of claims 1 to 5,
The first weighing mode corresponding to the case where the first powdery or granular material is not an essential compounding target, and the second weighing mode corresponding to the case where the first powdery or granular material is an essential compounding target A material blending device, further comprising a mode selection unit that enables selection operation of any one of the execution modes.

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