JP6076820B2 - Powder and particle metering device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a powder particle measuring and mixing device that measures and mixes a plurality of types of powder particles.

  In order to mix a plurality of types of granular material such as resin pellets at a predetermined ratio, for example, a metering and mixing device as in Patent Document 1 is used. The weighing and mixing apparatus of Patent Document 1 includes a plurality of supply hoppers that store powder particles that are pneumatically transported from an external raw material tank, and a weighing hopper that is disposed below the supply hopper. By feeding powder particles into the weighing hopper from the discharge port at the lower end of each supply hopper while weighing with the load cell, a predetermined amount of powder particles are supplied to the weighing hopper from each of the plurality of supply hoppers. ing. The weighing hopper is housed in the upper part of the casing, and the powder discharged from the discharge port at the lower end of the weighing hopper is stored in the lower part of the casing, and the stirring blade is provided in the lower part of the casing. Is stirred. Moreover, the supply port for supplying a granular material to external processing apparatuses, such as a molding machine, is provided in the lower end part of the casing.

JP 2001-147151 A

  The metering and mixing apparatus of Patent Document 1 performs the supply of powder and granular material from the supply hopper to the measurement hopper and the supply of powder and granular material from the measurement hopper to the lower part of the casing by dropping the powder and granular material. Therefore, the installation position of the supply hopper is increased, and the center of gravity of the apparatus is increased. When pneumatically transporting granular materials to an external processing device such as a molding machine, when pneumatically transporting granular materials to a supply hopper, or during operation of a metering and mixing device (for example, when rotating a stirring blade) Therefore, when the center of gravity of the device is high, the device is likely to vibrate, and there is a risk that accurate measurement cannot be performed due to the vibration. In addition, when a caster is provided in the weighing and mixing apparatus, even if the caster is in a locked state, the vibration of the apparatus tends to increase, which is a particular problem.

  Therefore, an object of the present invention is to provide a powder and particle metering and mixing device capable of suppressing vibration.

Means for Solving the Problems and Effects of the Invention

According to a first aspect of the present invention, there is provided a measuring and mixing device for a granular material, wherein the plurality of supply hoppers for storing the granular material are disposed at a position equal to or lower than the plurality of supply hoppers and supplied from the plurality of supply hoppers. A weighing hopper for storing and weighing the powder particles, a raw material tank that is arranged at a position lower than the weighing hopper, and supplies the powder particles to at least one of the plurality of supply hoppers , It is provided with the base which supports the said supply hopper, the said measurement hopper, and the said raw material tank .

According to this configuration, since the raw material tank is provided at a position lower than the weighing hopper, the center of gravity of the weighing and mixing device can be lowered as compared with the case where no raw material tank is provided. Therefore, the vibration of the metering / mixing device can be suppressed, and the metering accuracy can be improved.
In addition, since the metering and mixing device includes the raw material tank, the number of raw material tanks installed separately from the metering and mixing device can be reduced, and the cost and installation space can be reduced accordingly. Further, the length of the pipe connecting the raw material tank and the supply hopper can be shortened.
In addition, when the raw material tank is disposed below the supply hopper, the space below the supply hopper can be effectively utilized, and the raw material tank can be installed without increasing the installation space of the metering and mixing apparatus.

According to a second aspect of the present invention, there is provided a powder and particle measuring / mixing device according to the first aspect, wherein the powder and granular material supported by the gantry and disposed below the weighing hopper is discharged from the weighing hopper. And a mixing hopper that is stirred, and the raw material tank is disposed at a position lower than the mixing hopper.

According to this structure, since the raw material tank is arrange | positioned in the position lower than the mixing hopper arrange | positioned under the measurement hopper, the gravity center of an apparatus can be made lower.
In addition, since the mixing hopper is arranged below the weighing hopper, the position of the supply hopper becomes higher than when the mixing hopper is not provided, so lowering the center of gravity of the apparatus by the raw material tank suppresses vibration of the apparatus. This is particularly effective.

In the first or second invention, the powder and particle measuring and mixing device according to the third invention is supported by the gantry and disposed at a position facing the raw material tank in the horizontal direction with the measurement hopper interposed therebetween. And a control device.

  According to this configuration, since the control device and the raw material tank are disposed to face each other with the weighing hopper interposed therebetween, the center of gravity of the device can be brought closer to the center of the weighing hopper in the horizontal direction. Therefore, vibration of the weighing hopper can be further suppressed, and weighing accuracy can be improved.

In any one of the first to third inventions, the powder and particle measuring / mixing device according to the fourth invention is supported by the frame , disposed below the weighing hopper, and discharged from the weighing hopper. It has a blending material tank that stores powder and supplies it to other devices, and the blending material tank can move horizontally from a position below the weighing hopper to the side where the raw material tank is not disposed. It is characterized by being.

  According to this configuration, the blending material tank can be moved in the horizontal direction from the position below the weighing hopper to the side where the material tank is not disposed. It is easy to clean and maintain the blending material tank.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the supply hopper is different from the opening for supplying the granular material to the measurement hopper. The lower end part has an openable / closable discharge part for discharging the granular material, the raw material tank is arranged below the supply hopper, and the upper surface thereof is separated from the measuring hopper in the horizontal direction. It is inclined so as to be directed downward.

  According to this configuration, since the upper surface of the raw material tank disposed below the supply hopper is inclined downward as it is separated from the supply hopper in the horizontal direction, the granular material in the supply hopper is discharged from the discharge unit. At this time, even if the powder particles fall on the upper surface of the raw material tank, the powder particles can be prevented from accumulating on the upper surface of the raw material tank.

It is a figure which shows schematic structure of the measurement mixing apparatus which concerns on embodiment of this invention. It is a front view of a measurement mixing device. It is a right view of a measurement mixing apparatus. It is a top view of a measurement mixing apparatus.

  Embodiments of the present invention will be described below. The metering and mixing apparatus 1 of the present embodiment mixes a plurality of types of powder particles at a predetermined ratio, and then agitates and supplies the mixed powder particles to an external processing apparatus 101 such as a molding machine. It is a device for. As shown in FIGS. 1 to 4, the metering / mixing device 1 includes a metering hopper 3 and a mixing hopper 4 housed in a casing 2, a blending material tank 5, four supply hoppers 6, and two raw material tanks. 7, a control device 8, and a gantry 9 that supports them. Hereinafter, the metering and mixing apparatus 1 will be described using the front-rear direction and the left-right direction shown in FIGS.

  A plurality of casters 9 a with a lock function are attached to the gantry 9. The gantry 9 is a U-shaped plate member that is open at the front when viewed from above, and is substantially open at the front half of the central portion in the left-right direction. The casing 2 is disposed above the opening portion of the gantry 9 and is installed on the gantry 9 via a support member 21. The casing 2 is a rectangular parallelepiped casing that is open at the bottom, and the front plate of the casing 2 can be opened and closed around a hinge provided at the left end thereof. The front plate of the casing 2 is provided with two rectangular glass windows 2a and 2b, and an operation panel 22 is installed.

  The two raw material tanks 7 are arranged side by side in the front-rear direction on the right side of the lower portion of the casing 2, and are installed on the gantry 9 via a support member 71. The upper surface of the raw material tank 7 is inclined so as to go downward as the distance from the casing 2 increases. The upper surface of the raw material tank 7 is composed of a detachable lid 7a. The lid 7 a is opened, and the granular material is charged into the raw material tank 7. The capacity of the raw material tank 7 is, for example, 10L.

  A suction pipe 72 for sucking the powder stored in the raw material tank 7 passes through the lid 7a. The tip of the suction pipe 72 reaches the vicinity of the bottom of the raw material tank 7. In FIGS. 3 and 4, the suction pipe 72 is omitted.

  A cylindrical discharge pipe 7b extending obliquely downward toward the opposite side of the casing 2 is formed at the lower end of the raw material tank 7, and the tip of the discharge pipe 7b is formed at the tip of the discharge pipe 7b. A slide gate 73 for opening and closing the opening is provided. The slide gate 73 is manually opened and closed. In FIG. 3, the slide gate 73 is omitted.

  Four supply hoppers 6 are arranged side by side in the front-rear direction on the left and right sides of the upper portion of the casing 2. The supply hoppers 6 arranged at the right rear, left rear, right front, and left front of the casing 2 are referred to as a first supply hopper 6A, a second supply hopper 6B, a third supply hopper 6C, and a fourth supply hopper 6D, respectively. The volumes of the third supply hopper 6C and the fourth supply hopper 6D are smaller than the volumes of the first supply hopper 6A and the second supply hopper 6B. Each supply hopper 6 stores the same type or different types of particles (for example, resin pellets, pulverized materials, master batches, additives, pigments, etc.). In the third supply hopper 6C and the fourth supply hopper 6D, it is preferable that a material with a small blending ratio is stored.

  A suction flow path 12 is connected to each supply hopper 6. Further, a raw material transport channel 11 is connected to the first supply hopper 6A and the second supply hopper 6B, and the raw material transport channel 11 is connected to a raw material tank 100 installed away from the apparatus 1. Yes. The capacity of the raw material tank 100 is, for example, 50L. A raw material transport channel 10 is connected to the third supply hopper 6 </ b> C and the fourth supply hopper 6 </ b> D, and the raw material transport channel 10 is connected to the suction pipe 72 of the raw material tank 7. 2 to 4, only the end portions on the supply hopper 6 side of the suction channel 12 and the material transport channels 10 and 11 are shown.

  The four suction flow paths 12 are connected to the suction flow path 15 via a switching valve unit 13 including four switching valves 13 a that are respectively driven by an air cylinder 14. The suction channel 15 is connected to the transport blower 17, and a dust collection filter unit 16 is interposed in the middle of the suction channel 15. 2 to 4, the suction channel 15 is omitted. In addition, a filter 62 is provided above the supply hopper 6 to prevent the powder particles from being sucked into the suction flow path 12. The dust collection filter unit 16 is provided for capturing fine dust and raw material fragments that have passed through the filter 62.

  Further, the supply hopper 6 is provided with a level sensor 61 for detecting whether or not the amount of the granular material stored inside has reached the full level. The detection result of the level sensor 61 is transmitted to the control device 8.

  In order to supply the powder particles from the raw material tanks 7 and 100 to the respective supply hoppers 6, the transport blower 17 is operated with the switching valve 13a corresponding to the supply hopper 6 to which the powder particles are desired to be supplied opened. Thereby, the air inside the supply hopper 6 is sucked, and the granular material is pneumatically transported from the raw material tanks 7 and 100 to the supply hopper 6 through the raw material transport channels 10 and 11. When the level sensor 61 detects that the amount of powder in the supply hopper 6 has reached the full level, the transport blower 17 is stopped by the control device 8.

  A cylindrical discharge pipe 6 a extending obliquely upward is formed in the vicinity of the lower end of the surface of the supply hopper 6 facing the casing 2. The discharge pipe 6 a passes through the side wall of the casing 2, and the tip portion is disposed inside the casing 2. A discharge valve 63 for opening and closing the front end opening of the discharge pipe 6a is provided at the tip of the discharge pipe 6a. The discharge valve 63 is opened by being pressed from the inside of the discharge pipe 6a. In addition, a screw 64 that is driven by a motor 65 to push out powder particles is disposed inside the discharge pipe 6a. The distal end (discharge valve 63) of the discharge pipe 6a is positioned above the measuring hopper 3, and the granular material pushed out from the discharge pipe 6a is input to the measuring hopper 3.

  Further, the bottom plate 6 b of the supply hopper 6 is inclined so as to go downward as it is separated from the casing 2. The bottom plate 6b can be rotated and opened about an axis provided at an end portion on the casing 2 side. When changing the type of granular material stored in the supply hopper 6 or when cleaning the supply hopper 6, the bottom plate 6 b is opened, and all the granular material in the supply hopper 6 is discharged. Thus, the supply hopper 6 has an openable / closable discharge part for discharging the granular material to the outside of the casing 2 at the lower end thereof.

  The weighing hopper 3 is disposed inside the casing 2 below the tip of the discharge pipe 6a of the supply hopper 6 (discharge valve 63). That is, the weighing hopper 3 is arranged at a position lower than the supply hopper 6. An opening for receiving the granular material discharged from the discharge pipe 7b of the supply hopper 6 is formed at the upper end of the weighing hopper 3, and an opening for discharging the granular material at the lower end of the measuring hopper 3 Is formed. A discharge valve 31 that is driven by an air cylinder 32 and opens and closes the lower end opening of the measurement hopper 3 is provided at the lower end of the measurement hopper 3. The weighing hopper 3 is supported by the casing 2 via the load cell 33 in order to measure the mass of the granular material in the weighing hopper 3.

  The mixing hopper 4 is disposed below the weighing hopper 3 inside the casing 2. The mixing hopper 4 is arranged at a position higher than the raw material tank 7. At the upper end of the mixing hopper 4, an opening for receiving the granular material discharged from the lower end opening of the weighing hopper 3 is formed, and at the lower end of the mixing hopper 4, an opening for discharging the granular material is formed. Is formed. A discharge valve 41 that is driven by an air cylinder 42 and opens and closes the lower end opening of the mixing hopper 4 is provided at the lower end of the mixing hopper 4. Further, inside the mixing hopper 4, a stirring blade 43 that is driven by a motor 44 to stir the powder particles is disposed.

  The blend material tank 5 is disposed below the mixing hopper 4. The upper end portion of the blend material tank 5 is engaged with a guide rail 23 formed by the left and right ends of the lower end portion of the casing 2 and the upper end portion of the support member 21 so as to be movable in the front-rear direction. The lower end of the front plate of the casing 2 is located below the upper end of the blend material tank 5. Therefore, when the front plate of the casing 2 is in the closed state, the blending material tank 5 does not move forward. When cleaning and maintaining the blending material tank 5, the front plate of the casing 2 is opened, and the blending material tank 5 is moved forward along the guide rail 23.

  The blending material tank 5 is a container that tapers downward, and an opening for receiving the powder discharged from the lower end opening of the mixing hopper 4 is formed at the upper end of the blending material tank 5. In the lower end of the blending material tank 5, an opening for discharging the granular material is formed. The lower end of the blend material tank 5 is connected to the blend material transport channel 102 via a slide gate 51 that is manually opened and closed. The blend material transport channel 102 is connected to the processing apparatus 101.

  Further, the blend material tank 5 is provided with a level sensor 52 for detecting whether or not the amount of the granular material stored inside has reached a full level. The detection result of the level sensor 52 is transmitted to the processing device 101 via the control device 8.

  By opening the slide gate 51 and sucking the blend material transport channel 102 by a suction means (not shown) provided in the processing apparatus 101, the granular material stored in the blend material tank 5 is applied to the processing apparatus 101. Transported.

  The control device 8 is disposed on the left side of the lower portion of the casing 2 and is installed on the gantry 9. The control device 8 includes a control board on which a CPU, a RAM, a ROM, and the like are mounted, and a cover that covers the control board. The control device 8 is connected to the operation panel 22, level sensors 52 and 61, load cell 33, transport blower 17, air cylinders 14, 32 and 42, motors 44 and 65, and from the raw material tanks 7 and 100 to the supply hopper 6. The operation of pneumatically transporting the powder and the operation of mixing the powder stored in the supply hopper 6 at a predetermined ratio and supplying the mixture to the blending material tank 5 are controlled. The operation panel 22 can set the mass of the granular material supplied from each supply hopper 6 to the weighing hopper 3, and the control device 8 controls the motor 65 that drives the screw 64 based on this set value. Control the number of revolutions.

  Hereinafter, the operation of mixing the powder particles stored in the supply hopper 6 at a predetermined ratio and supplying them to the blending material tank 5 will be described. First, the screw 64 of one supply hopper 6 is driven to supply powder particles from the supply hopper 6 to the weighing hopper 3, and the mass of the powder particles in the measurement hopper 3 measured by the load cell 33 is determined in advance. Supply is stopped when the set mass is reached. Next, after the measurement value of the load cell 33 is reset to zero, the powder and granular material are supplied from another supply hopper 6 to the measurement hopper 3, and supplied when the mass measured by the load cell 33 reaches a predetermined mass. To stop. Similarly, for the remaining two supply hoppers 6, a granular material having a predetermined mass is supplied to the weighing hopper 3, and then the discharge valve 31 is switched to the open state so that the granular material in the weighing hopper 3 is transferred to the mixing hopper 4. throw into.

  After the above operation is repeated once or a plurality of times, the stirring blades 43 are driven to stir the powder particles stored in the mixing hopper 4. Thereafter, the discharge valve 41 is switched to the open state, and the powder particles are fed from the mixing hopper 4 to the blending material tank 5. The above operation is repeated once or a plurality of times, and when the level sensor 52 detects that the amount of the granular material in the blending material tank 5 has reached the full level, the discharge valve 41 is switched to the closed state, The operation of each unit described above is stopped. In addition, the processing device 101 that has received the full signal from the control device 8 pneumatically transports the powder in the blend material tank 5 to the processing device 101.

According to the metering and mixing apparatus 1 of the present embodiment described above, the following effects can be obtained.
Since the measuring and mixing apparatus 1 of the present embodiment includes the raw material tank 7 at a position lower than the measuring hopper 3, the center of gravity of the measuring and mixing apparatus 1 can be lowered as compared with the case where the raw material tank 7 is not provided. Therefore, the vibration of the metering / mixing device 1 can be suppressed, and the metering accuracy can be improved.
Moreover, since the mixing device 1 includes the raw material tank 7, the number of the raw material tanks 100 installed separately from the measuring and mixing device 1 can be reduced, and accordingly, the cost and installation space can be reduced. Further, the length of the pipe (raw material transport channel 10) connecting the raw material tank 7 and the supply hopper 6 can be shortened.
In addition, since the raw material tank 7 is disposed below the supply hopper 6, the space below the supply hopper 6 can be effectively utilized, and the raw material tank 7 can be installed without increasing the installation space of the metering and mixing apparatus 1.

Moreover, in this embodiment, since the raw material tank 7 is arrange | positioned in the position lower than the mixing hopper 4 arrange | positioned under the measurement hopper 3, the gravity center of the apparatus 1 can be made lower.
In addition, since the mixing hopper 4 is disposed below the weighing hopper 3, the position of the supply hopper 6 becomes higher than when the mixing hopper 4 is not provided, so that the center of gravity of the apparatus 1 can be lowered by the raw material tank 7. This is particularly effective for suppressing the vibration of the device 1.

  Moreover, in this embodiment, since the control apparatus 8 and the raw material tank 7 are opposingly arranged on both sides of the casing 2, the gravity center of the apparatus 1 can be closely approached to the center part of the casing 2 regarding a horizontal direction. Therefore, the vibration of the weighing hopper 3 accommodated in the casing 2 can be further suppressed, and the weighing accuracy can be improved.

  Moreover, in this embodiment, since the blending material tank 5 can be moved in the horizontal direction from the position below the measuring hopper 3 to the side where the material tank 7 is not disposed, the material tank 7 becomes an obstacle. The blending material tank 5 can be moved without any problem, and the blending material tank 5 can be easily cleaned and maintained.

  Further, in the present embodiment, since the upper surface of the raw material tank 7 disposed below the supply hopper 6 is inclined so as to move downward as it is separated from the casing 2 in the horizontal direction, the bottom plate 6b is opened and the supply hopper 6 When the granular material is discharged, even if the granular material falls on the upper surface of the raw material tank 7, it can be prevented that the granular material accumulates on the upper surface of the raw material tank 7.

  Moreover, in this embodiment, the upper surface of the raw material tank 7 is comprised by the detachable cover 7a, and in the state which removed the cover 7a, it goes so that an upper end of the raw material tank 7 will go below, so that it leaves | separates from the casing 2 in the horizontal direction. Therefore, it is easy to feed the granular material from the upper end opening of the raw material tank 7, and cleaning and maintenance are easy to perform.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  In the above embodiment, the capacity of the two raw material tanks 7 is the same, but they may be different. Moreover, in the said embodiment, although the capacity | capacitance of the four supply hoppers 6 differs, all may be the same.

  Moreover, in the said embodiment, although the number of the raw material tanks 7 with which the measurement mixing apparatus 1 is provided is two, it may be one or may be three or more. Moreover, in the said embodiment, although the number of the supply hoppers 6 is 4, it may be three or less or may be five or more.

  In the above embodiment, a screw feeder is used as a mechanism for supplying the granular material from the supply hopper 6 to the weighing hopper 3, but a rotary feeder, a slide gate, or the like may be used.

  In the above embodiment, the stirring blade 43 is used as a means for stirring the powder particles in the mixing hopper 4, but the stirring means is not limited to this, and for example, stirring is performed by rotating the mixing hopper itself. It may be configured as follows.

  In the above embodiment, the granular material is supplied from the mixing hopper 4 to the blending material tank 5, and the granular material is supplied from the blending material tank 5 to the processing apparatus 101 via the blending material transport channel 102. However, it may be configured such that the granular material flows directly from the mixing hopper 4 into the blending material transport channel 102 without providing the blending material tank 5.

  In the above embodiment, the weighing hopper 3 and the mixing hopper 4 are arranged in the vertical direction inside the casing 2, but the powder particles are directly stored in the casing 2 and stirred without providing the mixing hopper 4. You may be comprised so that. In the case of this modified example, the blend material tank 5 may be provided, but without the blend material tank 5, the powder material is configured to flow directly into the blend material transport channel 102 from the lower part of the casing 2. It may be.

  In addition, the metering and mixing apparatus 1 of the above embodiment is configured to stir after blending a plurality of types of powder particles at a predetermined ratio, but supplies the powder particles to the processing apparatus 101 without stirring. It may be configured to. In this modified example, either the mixing hopper 4 or the blend material tank 5 may not be provided.

DESCRIPTION OF SYMBOLS 1 Weighing and mixing apparatus 2 Casing 3 Weighing hopper 4 Mixing hopper 5 Blend material tank 6 Supply hopper 6b Bottom plate (discharge part)
7 Raw material tank 7a Lid 8 Control device 100 Raw material tank 101 Processing device

Claims (5)

A plurality of supply hoppers for storing powder particles;
A weighing hopper that is disposed at a position equal to or lower than the plurality of supply hoppers and stores and measures the powder particles supplied from the plurality of supply hoppers;
A raw material tank that is disposed at a position lower than the weighing hopper, and that supplies powder particles to at least one of the plurality of supply hoppers ;
An apparatus for measuring and mixing granular material, comprising: the supply hopper, the weighing hopper, and a gantry for supporting the raw material tank . Supported by the pedestal, disposed below the weighing hopper, and provided with a mixing hopper in which the granular material discharged from the weighing hopper is stored and stirred,
The said raw material tank is arrange | positioned in the position lower than the said mixing hopper, The metering / mixing apparatus of the granular material of Claim 1 characterized by the above-mentioned. 3. The granular material according to claim 1, further comprising a control device that is supported by the gantry and is disposed at a position facing the raw material tank in a horizontal direction across the weighing hopper. Metering and mixing device. Supported by the pedestal, disposed below the weighing hopper, and provided with a blending material tank for storing powder particles discharged from the weighing hopper and supplying them to other devices;
The powder material according to any one of claims 1 to 3, wherein the blend material tank is movable in a horizontal direction from a position below the weighing hopper to a side where the raw material tank is not disposed. Metering and mixing device. The supply hopper has an openable and closable discharge part for discharging the granular material at the lower end thereof separately from the opening for supplying the granular material to the weighing hopper,
The said raw material tank is arrange | positioned under the said supply hopper, and the upper surface inclines so that it may go below, so that it leaves | separates from the said measurement hopper in the horizontal direction. The powder and particle measuring and mixing apparatus according to 1.

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