JP2019116024A - Material supply system - Google Patents

Abstract

To provide a material supply system capable of ensuring supply of a material from a supply device and reducing a recovery operation cost at the time of an abnormality.SOLUTION: The material supply system includes a supply device 2 for storing the material to be supplied to a continuous kneading extruder 1, a first belt conveyor 3 for receiving the material supplied by dropping from the supply device 2 and conveying it toward the continuous kneading extruder 1, a displacement sensor 4 for measuring dimensions of the material being conveyed by the first belt conveyor 3, a volume abnormality detection unit 60 for detecting volume abnormality based on a volume of the material determined from a result of measurement by the displacement sensor 4, and a control unit 6 for stopping driving of the supply device 2 and the first belt conveyor 3 when an abnormality is detected by the volume abnormality detection unit 60.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a material supply system for supplying a material such as a rubber material to a kneader.

  In order to produce a rubber product, the raw material rubber is blended with additives such as a reinforcing agent, a filler and a flexing agent, and the mixture is introduced into a kneader and kneaded. Each material is stored in the feeding device, and is fed downstream from the feeding device so that the feeding weight per unit time becomes a predetermined amount by a weighing scale provided in the feeding device.

  Patent Document 1 discloses a feeding device used not in the rubber field but in the food field.

Japanese Patent Application Publication No. 2007-139422

  However, although the material is supplied by dropping from the supply device equipped with the weighing scale, there is no guarantee that the material has been reliably supplied. Although the weight dropped by the weight scale of the feeding device is controlled, there is a case where the dropped weight from the weight gauge of the feeding device is clumped and attached in the middle. In the actual process, it is performed whether material is supplied by visual inspection by human.

  Also, in the case of adopting a configuration in which the material is dropped directly into the subsequent process such as a continuous kneading extruder from the feeding device, identification of a defective material occurs when a problem occurs in the feeding of the material from the feeding device. It takes a long time for removal, which may increase the cost of recovery work.

  The present disclosure has been made in view of such problems, and its object is to ensure the supply of the material from the supply device and to provide the material supply capable of reducing the cost of recovery work in case of abnormality. It is to provide a system.

  The present disclosure takes the following measures to achieve the above object.

That is, the material supply system of the present disclosure
A supply device for storing the material to be supplied to the kneader;
A first belt conveyor which receives the material supplied by dropping from the supply device and conveys the material to the kneader;
A displacement sensor that measures the dimensions of the material conveyed by the first belt conveyor;
A volume abnormality detection unit that detects volume abnormality based on the volume of the material determined from the measurement result of the displacement sensor;
And a control unit configured to stop driving of the supply device and the first belt conveyor when an abnormality is detected by the volume abnormality detection unit.

  As described above, the dimensions of the material supplied by dropping from the supply device are measured by the displacement sensor, and when there is an abnormality in the volume determined by the dimensions, the drive of the supply device and the first belt conveyor is stopped. An abnormality in which the material is not properly supplied can be detected, and the supply of the material from the supply device can be made accurate. In addition, since the drive of the feeding device and the first belt conveyor is stopped at the time of abnormality detection, it is suppressed or prevented that an abnormal material is fed to the kneading machine as compared with the configuration where the material is directly fed from the feeding device to the kneading machine. It is possible to reduce the cost of recovery work.

The figure which shows the material supply system of 1st Embodiment Explanatory drawing regarding the detected volume and the conveyance speed of the 1st belt conveyor Flow chart showing the operation of the system The figure which shows the material supply system of 2nd Embodiment

First Embodiment
Hereinafter, a first embodiment of the present disclosure will be described with reference to the drawings.

  In the material supply system shown in FIG. 1, the supply amount per unit time becomes constant with respect to the continuous kneading extruder (kneader 1) which simultaneously performs the material charging process, the kneading process, and the discharge process of the kneaded material. So, supply the material. The system includes a supply device 2, a first belt conveyor 3, a displacement sensor 4, a second belt conveyor 5, and a control unit 6 that controls each part.

  Examples of the material include pelletized rubber, silica, carbon black, zinc oxide, antioxidant, sulfur, stearic acid and wax.

  The feeding device 2 stores the material to be fed to the kneading machine 1. The supply device 2 has a storage case 20 for storing the material, and a weight scale 21 for measuring the weight including the storage case 20 so that the weight of the material supplied per unit time falls within a predetermined range. Drop the material.

  The first belt conveyor 3 receives the material supplied by dropping from the supply device 2 and conveys the material to the kneader 1. The first belt conveyor 3 is provided with a weight sensor 7 that measures the weight of the first belt conveyor 3 including the material. The weight sensor 7 can be omitted.

  The displacement sensor 4 measures the dimensions of the material conveyed by the first belt conveyor 3. Specifically, the displacement sensor 4 is a two-dimensional laser displacement meter, and measures the distance between an object on the predetermined measurement line L of the first belt conveyor 3 and the displacement meter. The belt conveyor 3 corresponds to the width and height of the material passing through the measurement line L. Therefore, the dimensions (width and height) of the material passing through the predetermined measurement line L are measured.

  The dimensions of the material obtained by the displacement sensor 4 may be displayed as follows. The pixels may be arranged in a matrix in the transport direction and the width direction, and a plurality of colors (for example, 256 gradations) associated with the height may be displayed for each pixel. You can understand the height and distribution of materials at a glance.

  One or a plurality of sets of the feeding device 2, the first belt conveyor 3, the displacement sensor 4 and the weight sensor 7 are provided, each for different materials. FIG. 1 shows an example of handling the materials A and B.

  The second belt conveyor 5 conveys the material supplied from the first belt conveyor 3 toward the kneader 1. The second belt conveyor 5 can be omitted.

  The control unit 6 has a volume abnormality detection unit 60 and a weight abnormality detection unit 61.

  The volume abnormality detection unit 60 detects the volume abnormality based on the volume of the material determined from the measurement result of the displacement sensor 4. Specifically, when the volume fluctuation per unit time is not within the preset allowable range, it is determined that a volume abnormality has occurred. If the volume variation per unit time is within the preset allowable range, it is determined that the condition is normal.

  The weight abnormality detection unit 61 detects weight abnormality based on the measurement result of the weight sensor 7. Specifically, when the weight fluctuation per unit time is not within the preset allowable range, it is determined that a weight abnormality has occurred. If the weight variation per unit time is within a preset allowable range, it is determined to be normal. When the weight sensor 7 is omitted, the weight abnormality detection unit 61 can also be omitted.

  The control unit 6 controls the driving of the supply device 2 and the first belt conveyor 3. The control unit 6 is configured to stop the driving of the supply device 2 and the first belt conveyor 3 when an abnormality is detected by at least one of the volume abnormality detection unit 60 and the weight abnormality detection unit 61. It is done. In the present embodiment, the control unit 6 is configured to stop the driving of the supply device 2, the first belt conveyor 3, the second belt conveyor 5, and the kneading machine 1 when an abnormality is detected by the volume abnormality detection unit 60. Although it comprises, if the supply apparatus 2 and the 1st belt conveyor 3 are stopped, design change of others is arbitrarily possible.

  The control unit 6 has a conveyance control unit 62. The transport control unit 62 controls the transport speed of the first belt conveyor 3 based on the measurement result of the displacement sensor 4. Specifically, as shown in FIG. 2, the volume of the material to be conveyed is controlled to be constant. If the volume of the material detected by the displacement sensor 4 is small, the transport speed is increased, and if the volume of the material is increased, the transport speed is decreased.

  The transport speed of the second belt conveyor 5 is set to a constant speed corresponding to the capacity and the transport speed of the kneader 1, and the control unit 6 causes the second belt conveyor 5 to be set to the set constant speed. Control.

  FIG. 3 is a flow chart showing the operation of the system. When the system starts driving, the kneader 1, the feeding device 2, the first belt conveyor 3, and the second belt conveyor 5 are operated in step ST1. Thus, the material travels from the supply device 2 to the kneader 1 via the first belt conveyor 3 and the second belt conveyor 5. In the next step ST2, the displacement sensor 4 and the weight sensor 7 detect the volume and weight. In the next step ST3, the volume abnormality detection unit 60 determines whether the volume fluctuation per unit time is within the allowable range. Further, in step ST4, the weight abnormality detection unit 61 determines whether the weight fluctuation per unit time is within the allowable range. If it is determined in either step ST3 or step ST4 that the range is not within the allowable range, the control unit 6 determines in step ST5 that the kneader 1, the feeder 2, the first belt conveyor 3, and the second belt conveyor Stop driving of 5. When each device is stopped, the operator checks the cause of the abnormality, and when the recovery is completed, the process manually returns to step ST1.

  If no abnormality is detected in step ST4 (ST4: YES), the transfer control unit 62 controls the transfer speed of the first belt conveyor 3 according to the volume detected by the displacement sensor 4 in the next step ST5. Do. Thereby, a fixed amount is supplied according to the distribution state of the material on the first belt conveyor 3. As long as no abnormality is detected in steps ST3 and ST4, the process returns to step ST1.

Second Embodiment
Next, a material supply system according to a second embodiment will be described. In the second embodiment, as shown in FIG. 4, a batch kneader 1 ′ is employed instead of the continuous kneader / extruder 1. The batch-type kneader 1 'closes the casing of the kneader after the input of the material, kneads, and discharges the kneaded material after the kneading. It is not necessary to continuously supply the materials, and predetermined materials are put into the collection box 8, and all the materials are put together into the kneader 1 '.

  In the case of the batch type kneader 1 ′, it is not necessary to continuously supply the material as in the continuous type kneading extruder 1, so the transport speed of the first belt conveyor 3 is based on the measurement result of the displacement sensor 4. It is possible to omit the transport control unit 62 to control. In practice, control can be considered as follows. In a state where the first belt conveyor 3 is stopped, the material having a predetermined weight is dropped from the supply device 2. The material is conveyed by the first belt conveyor 3, the dimensions of the material are measured by the displacement sensor 4, and the first belt conveyor 3 is stopped. At this time, the material remains on the first belt conveyor 3. If it can be confirmed by each displacement sensor 4 that all of the supply devices 2 can supply the predetermined weight and the predetermined volume to the first belt conveyor 3, all the first belt conveyors 3 are driven to make the material Load into the collection box 8 Thereafter, the collection box 8 feeds the material into the batch kneader 1 '. That is, the operations of the feeding device 2 and the first belt conveyor 3 perform intermittent operations.

  Although the second belt conveyor 5 is omitted in FIG. 4, the second belt conveyor 5 may be provided.

As described above, the material supply system of the present embodiment
A feeding device 2 for storing materials to be fed to the continuous kneading extruder 1 (batch kneading machine 1 ′);
A first belt conveyer 3 which receives the material supplied by dropping from the supply device 2 and conveys the material to the continuous kneading extruder 1 (batch kneading machine 1 ');
A displacement sensor 4 for measuring the dimensions of the material conveyed by the first belt conveyor 3;
A volume abnormality detection unit 60 that detects volume abnormality based on the volume of the material determined from the measurement result of the displacement sensor 4;
The control unit 6 is configured to stop the driving of the supply device 2 and the first belt conveyor 3 when an abnormality is detected by the volume abnormality detection unit 60.

  As described above, the dimensions of the material supplied by dropping from the supply device 2 are measured by the displacement sensor 4 and the drive of the supply device 2 and the first belt conveyor 3 is stopped when there is an abnormality in the volume determined by the dimensions. The abnormality that the material is not properly supplied from the supply device 2 can be detected, and the supply of the material from the supply device 2 can be made accurate. In addition, since the driving of the feeding device 2 and the first belt conveyor 3 is stopped at the time of abnormality detection, an abnormal material is thrown into the kneading machine 1 as compared with the configuration in which the material is directly fed into the kneading machine 1 from the feeding device 2 Can be suppressed or prevented, and the cost of restoration work can be reduced.

  In the present embodiment, the second belt conveyor 5 for conveying the material supplied from the first belt conveyor 3 toward the kneading machine 1 is provided.

  According to this configuration, when the first belt conveyor 3 is stopped at the time of abnormality detection, the second belt conveyor 5 may be the first belt conveyor 3 even if the material is dropped to the downstream side from the first belt conveyor 3 And the kneader 1, the time until the material is supplied to the kneader 1 becomes long, and it is possible to reliably prevent the material from being fed into the kneader when an abnormality occurs. It becomes.

  In this embodiment, a weight sensor 7 that measures the weight of the first belt conveyor 3 including the material, and a weight abnormality detection unit 61 that detects weight abnormality based on the measurement result of the weight sensor 7 are provided. The control unit 6 is configured to stop the driving of the supply device 2 and the first belt conveyor 3 when an abnormality is detected in at least one of the volume abnormality detection unit 60 and the weight abnormality detection unit 61.

  According to this configuration, since the abnormality is detected based on the two physical quantities of volume and weight, it is possible to improve the reliability of supply.

  In the present embodiment, the conveyance control unit 62 that controls the conveyance speed of the first belt conveyor 3 based on the measurement result of the displacement sensor 4 is provided.

For example, even if the weight is the same, the material may solidify or spread in one place. Even at uniform transport speeds, the volume of material supplied can vary.
According to this configuration, since the transport speed of the first belt conveyor 3 is controlled by the dimensions of the material measured by the displacement sensor 4, it is possible to control the supply amount per unit time to a desired amount.
When the kneader is a continuous kneading extruder 1, it is useful for uniformly feeding the material.

  In the first embodiment shown in FIG. 1, the kneader 1 is a continuous kneading extruder 1 which simultaneously inputs the material and discharges the kneaded material. It is a preferred application of the present disclosure as it is preferable if the supply of material is uniform.

  In the second embodiment shown in FIG. 4, the kneader 1 ′ is a batch-type kneader 1 ′ that performs mixing after the input of materials and discharges the mixture after mixing.

  As mentioned above, although embodiment of this indication was described based on a drawing, it should be thought that a specific structure is not limited to these embodiments. The scope of the present disclosure is indicated not only by the above description of the embodiments but also by the claims, and further includes all modifications within the meaning and scope equivalent to the claims.

  For example, the order of execution of each process such as operations, procedures, steps, and steps in the apparatuses, systems, programs, and methods shown in the claims, the specification, and the drawings is the output order of the previous process. It can be realized in any order as long as it is not used in processing. Even if the flow in the claims, the description and the drawings is described using “first”, “next” and the like for convenience, it does not mean that execution in this order is essential. .

  For example, although each of the units 60 to 62 shown in FIG. 1 is realized by executing a predetermined program by the CPU of the computer, each unit may be configured by a dedicated memory or a dedicated circuit.

  In the system of the present embodiment, the units 60 to 62 are mounted on one computer, but the units 60 to 62 may be distributed and mounted on a plurality of computers.

  It is possible to adopt the structure adopted in each of the above-described embodiments in any other embodiment. The specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present disclosure.

1 Continuous kneading extruder (kneader)
1 'Batch-type kneader (kneader)
DESCRIPTION OF SYMBOLS 2 Supply apparatus 3 1st belt conveyor 4 Displacement sensor 5 2nd belt conveyor 6 Control part 60 Volume abnormality detection part 61 Weight abnormality detection part 62 Conveyance control part 7 Weight sensor

Claims (6)

A supply device for storing the material to be supplied to the kneader;
A first belt conveyor which receives the material supplied by dropping from the supply device and conveys the material to the kneader;
A displacement sensor that measures the dimensions of the material conveyed by the first belt conveyor;
A volume abnormality detection unit that detects volume abnormality based on the volume of the material determined from the measurement result of the displacement sensor;
A material supply system, comprising: a control unit that stops driving of the supply device and the first belt conveyor when an abnormality is detected by the volume abnormality detection unit.   The system according to claim 1, further comprising a second belt conveyor for conveying the material supplied from the first belt conveyor toward the kneader. A weight sensor for measuring the weight of the first belt conveyor including the material;
A weight abnormality detection unit that detects weight abnormality based on the measurement result of the weight sensor;
The control unit is configured to stop driving of the supply device and the first belt conveyor when an abnormality is detected in at least one of the volume abnormality detection unit and the weight abnormality detection unit. A system according to claim 1 or 2.   The system according to any one of claims 1 to 3, further comprising a conveyance control unit configured to control the conveyance speed of the first belt conveyor based on the measurement result of the displacement sensor.   The system according to any one of claims 1 to 4, wherein the kneader is a continuous kneader-extruder that simultaneously performs input of material and discharge of a kneaded material.   The system according to any one of claims 1 to 4, wherein the kneader is a batch-type kneader which knead after the input of the material and discharge the kneaded material after the kneading.

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