JP2019064119A - Feeding device and measuring and mixing device - Google Patents

Abstract

To provide a technique for recovering powder and granular material in a feed hopper when an operation is finished with the powder and granular material in the feed hopper remaining in a measuring and mixing device.SOLUTION: A measuring and mixing device of the present invention comprises a plurality of feeding devices. The feeding device includes a casing for containing powder and granular material, a screw disposed inside the casing and for pushing out the powder and granular material, and a takeoff flow passage disposed outside a lower part of the casing and capable of communicating with an inside of the casing. In the vicinity of a lower end of the casing, an outlet for communicating the inside of the casing with the outlet channel is formed, and in the outlet channel, a suction port connected to the suction device is formed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a feeding device and a metering and mixing device for discharging powder and granular material.

  There is a measuring and mixing device for supplying a fixed amount of mixed powder and particulate materials to an external processing device such as a molding machine after mixing a plurality of types of powder and particulate materials such as plastic pellets at a predetermined ratio and stirring. . The metering and mixing apparatus has a plurality of feed hoppers containing a plurality of types of powdery particles. Inside the discharge pipe of the feed hopper, a screw driven by a motor to push out the powder is arranged.

JP 2014-213497

  In the metering and mixing apparatus, in particular, in the case where the residual material is not managed, the operation is generally finished with the powdery particles remaining in the feed hopper. In this case, the process of collecting the powdery particles in the feed hopper is further required. In addition, at the time of material replacement, it is necessary to recover all the in-flight material including the hopper so as not to remain. Then, although methods, such as collecting manually from material removal provided in the lower part of the supply apparatus, may be taken, the effort of an operation | work increases. In addition, since the material entering the material removal pipe can not be supplied at the normal time, a supply loss may occur correspondingly.

  Therefore, an object of the present invention is to provide a feeding device and a measuring and mixing device capable of efficiently recovering the remaining powdery particles.

  According to a first aspect of the present invention, there is provided a feeding apparatus comprising: a casing for containing particulate matter; a screw disposed inside the casing; a screw for extruding the particulate matter; and a lower outer side of the casing; An outlet for communicating the inside of the casing with the outlet channel is formed in the vicinity of the lower end of the casing, and a suction port is formed in the outlet channel. A suction port connected to the device is formed.

  In this supply device, when the operation is finished with the powdery particles remaining in the casing, the powdery particles remaining in the casing can be suctioned from the suction port via the extraction flow path. Therefore, it is possible to reduce waste of powdery particles remaining in the casing and efficiently collect the powdery particles remaining in the casing.

  In the supply device according to a second aspect of the present invention, in the first aspect, an inlet for introducing an air flow is formed in the takeout flow path.

  In this supply device, when the granular material is suctioned from the suction port through the extraction flow path, an air flow is introduced into the extraction flow path through the introduction port. Therefore, the powder and granular material remaining in the casing can be efficiently sucked from the suction port via the extraction flow passage.

  A supply device according to a third aspect of the present invention is the device according to the second aspect, wherein the outlet flow passage is formed along the lower portion of the casing, the inlet is disposed at one end of the outlet flow passage, A mouth is arranged at the other end side of the above-mentioned extraction channel.

  In this supply device, in the extraction flow channel, the inlet and the suction port are disposed apart from each other, whereby powder and particulate matter remaining in the casing can be efficiently sucked from the suction opening through the extraction flow channel. it can.

  According to a fourth aspect of the present invention, in the third aspect, the inlet and the suction port are disposed above the outlet.

  In this supply device, when the suction port and the suction port are not located by the inlet port and the suction port above the outlet, the powder and granular material in the discharge channel is the inlet port. And it can control that it is pushed out to a suction opening.

  A supply device according to a fifth aspect of the present invention is the device according to the fourth aspect, wherein the introduction port and the suction port are disposed symmetrically with respect to a vertical plane passing through the lower end of the extraction flow channel.

  In this supply device, the inlet and the suction port can be reversed, and the suction pipe can be easily attached to the suction port.

  In a feeder according to a sixth aspect of the present invention, in any of the first to fifth aspects, the screw is disposed to be inclined, and the outlet is lower than an extrusion portion formed on an outer periphery of the screw. Will be placed.

  In this supply device, when the suction from the suction port of the takeout flow path is not performed, it is possible to suppress that the powder and granular material in the casing is pushed out of the extrusion portion of the screw into the takeout flow path.

  In a feeder according to a seventh aspect of the present invention, in any of the first to sixth aspects, the casing has an opening and closing member for opening and closing the outlet.

  In this supply device, when the suction from the suction port of the takeout flow path is not performed, it is possible to prevent the granular material in the casing from moving into the takeout flow path by closing the take-out port.

  A metering and mixing apparatus according to an eighth invention comprises a plurality of the feeding apparatuses according to any of the first to seventh inventions.

  In this measuring and mixing device, waste of powder and granular material remaining in the casing can be reduced in each of the plurality of feeding devices, and the powder and granular material remaining in the casing can be efficiently recovered.

  As described above, according to the present invention, the following effects can be obtained.

  In the first aspect of the invention, when the operation is finished in a state where the powdery particles remain in the casing, the powdery particles remaining in the casing can be suctioned from the suction port via the extraction flow passage. Therefore, it is possible to reduce waste of powdery particles remaining in the casing and efficiently collect the powdery particles remaining in the casing.

  According to the second aspect of the invention, when the powder or granular material is sucked from the suction port through the extraction flow path, an air flow is introduced into the extraction flow path through the inlet. Therefore, the powder and granular material remaining in the casing can be efficiently sucked from the suction port via the extraction flow passage.

  In the third invention, the suction port and the introduction port are disposed apart from each other in the takeout flow path, so that the powder and particles remaining in the casing can be efficiently sucked from the suction port through the takeout flow path. Can.

  In the fourth aspect of the present invention, the powder particles in the extraction flow channel are suctioned when suction is not performed from the suction port of the extraction flow channel by arranging the suction port and the introduction port above the outlet. It can control that it is pushed out to a mouth and an inlet.

  In the fifth aspect of the present invention, the suction port and the introduction port can be reversed, and the suction pipe can be easily attached to the suction port.

  According to the sixth aspect of the present invention, it is possible to suppress the powder particles in the casing from being pushed out of the extrusion portion of the screw into the extraction channel when suction from the suction port of the extraction channel is not performed.

  In the seventh aspect of the present invention, when the suction from the suction port of the takeout flow path is not performed, the powder particles in the casing can be prevented from moving into the takeout flow path by closing the take-out port.

  In the eighth aspect of the invention, it is possible to efficiently recover the powder and particulate matter remaining in the casing by reducing waste of the powder and particulate matter remaining in the casing in each of the plurality of feeding devices.

It is a figure showing composition of a measurement mixing device concerning an embodiment of the present invention. It is a front view of the feed hopper of FIG. Figure 2 is a side view of the feed hopper of Figure 1; It is sectional drawing in the aa line | wire of FIG. It is sectional drawing in the bb line | wire of FIG. It is a figure which shows the circuit which collect | recovers a granular material in the measuring and mixing apparatus of FIG.

  Hereinafter, a measuring and mixing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  The measuring and mixing device 1 of the present embodiment mixes a plurality of types of powder particles at a predetermined ratio, and then stirs and supplies a fixed amount of the mixed powder particles to an external processing device 101 such as a molding machine. A device for As shown in FIG. 1, the weighing and mixing apparatus 1 includes a weighing hopper 3, a mixing hopper 4, a tank 5, four supply hoppers 6 (supply devices), four raw material tanks 100, and a control device 8. Have.

  The four feed hoppers 6 are arranged side by side in the front-rear direction two each on the left and right sides of the upper part of the apparatus (the illustration is simplified). The supply hopper 6 accommodates the same type or different types of powder particles (for example, resin pellets, crushed materials, additives, pigments, etc.).

  The raw material transport flow path 10 is connected to the four supply hoppers 6, and the raw material transport flow path 10 is connected to the raw material tank 100.

  A suction flow path 12 is connected to the supply hopper 6. The four suction flow channels 12 are connected to the suction flow channel 15 via the switching valve unit 13. The switching valve unit 13 has four switching valves 13 a which are respectively driven by the air cylinder 14. The suction flow path 15 is connected to the transport blower 17, and a dust collection filter unit 16 is interposed in the middle of the suction flow path 15. The dust collection filter unit 16 is provided to capture fine dust and fragments of the raw material.

  In order to supply the granular material from the raw material tank 100 to the supply hopper 6, the transfer blower 17 is operated with the switching valve 13a corresponding to the supply hopper 6 to which the granular material is to be supplied open. Thereby, the air inside the feed hopper 6 is sucked, and the granular material is pneumatically transported from the raw material tank 7, 100 to the feed hopper 6 through the raw material transport flow path 10, 11.

  In the vicinity of the lower end of the feed hopper 6, a discharge pipe 6a extending in the upper diagonal direction is formed. A discharge valve 6 b for opening and closing the front end opening of the discharge pipe 6 a is provided at the front end of the discharge pipe 6 a. The discharge valve 6 b is in an open state by being pressed by the granular material discharged from the inside of the discharge pipe 6 a. Inside the discharge pipe 6a, a screw 62 which is driven by a motor and pushes out the granular material is disposed. The tip end of the discharge pipe 6 a (discharge valve 6 b) is located above the measuring hopper 3, and the powder and granular material pushed out from the discharge pipe 6 a is to be introduced into the measuring hopper 3.

  The metering hopper 3 is disposed below the end of the discharge pipe 6 a of the feed hopper 6. The upper end of the weighing hopper 3 is formed with an opening for receiving the granular material discharged from the discharge pipe 6a of the feed hopper 6, and the lower end of the measuring hopper 3 is an opening for discharging the granular material Is formed. At the lower end portion of the measuring hopper 3, a discharge valve 31 which is driven by an air cylinder 32 and opens and closes the lower end opening of the measuring hopper 3 is provided.

  The mixing hopper 4 is disposed below the measuring hopper 3. The upper end of the mixing hopper 4 is formed with an opening for receiving the granular material discharged from the lower end opening of the weighing hopper 3, and the lower end of the mixing hopper 4 is an opening for discharging the granular material It is formed. At the lower end portion of the mixing hopper 4, a discharge valve 41 driven by an air cylinder 42 for opening and closing the lower end opening of the mixing hopper 4 is provided.

  The tank 5 is a container which is tapered downward, and the upper end of the tank 5 is formed with an opening for receiving the powder and particles discharged from the lower end opening of the mixing hopper 4. At the lower end, an opening for discharging powder is formed. The lower end portion of the tank 5 is connected to the transport flow path 102 via a slide gate 51 which is manually opened and closed. The transport flow path 102 is connected to the processing device 101. The processing apparatus 101 is, for example, an injection molding machine or a dryer. Alternatively, it may be a storage container that stores powder particles in place of the processing device 101. The transport flow path 102 is not only an air flow transport path, but also may be a pipe path through which the granular material is dropped by its own weight when the measurement and mixing device 1 is installed on the processing device 101.

  The structure of the supply hopper 6 of this embodiment is demonstrated based on FIGS. 2-5.

  As shown in FIGS. 2 to 5, the supply hopper 6 has a casing 61 that accommodates powder particles such as plastic pellets. In the vicinity of the lower end of the casing 61, a discharge pipe 6a extending obliquely upward is formed. As described above, the screw 62 is disposed inside the discharge pipe 6a (the casing 61). The screw 62 has a rotary shaft 62a inclined in the upper diagonal direction and a helical extrusion portion 62b formed on the outer periphery of the rotary shaft 62a. In the rotation shaft 62 a of the screw 62, the pushing portion 62 b is formed from the portion separated from the bottom portion 61 a of the casing 61 by a predetermined length a toward the upper end. Below the casing 61, a motor 63 for driving the screw 62 is disposed.

  As shown in FIG. 5, the lower portion of the casing 61 is curved to be convex downward. An outlet 64 is formed in the vicinity of the lower end of the casing 61, and an outlet channel 65 formed along a convex curved surface in the vicinity of the lower portion of the casing 61 is disposed outside the lower portion of the casing 61. The outlet 64 has a rectangular shape, and each of the vertical and horizontal lengths is five or more times the particle diameter of the powder. The cross-sectional shape perpendicular to the longitudinal direction of the extraction flow passage 65 is rectangular, and the length in the vertical and horizontal directions is three or more times the particle diameter of the granular material. The takeout flow passage 65 communicates with the inside of the casing 61 via the takeout port 64. Therefore, when the granular material is accommodated inside the casing 61, a part of the granular material is moved from the inside of the casing 61 to the extraction flow path 65 via the outlet 64.

  The extraction flow path 65 has an introduction port 65 a for introducing an air flow, and a suction port 65 b connected to the suction device 67 via the suction pipe 66. As shown in FIG. 5, the inlet 65 a is disposed on one end side of the extraction flow path 65, and the suction port 65 b is disposed on the other end side of the extraction flow path 65. The lower end of the inlet port 65 a and the lower end of the suction port 65 b are disposed above the upper end of the outlet 64 by the height b, and are disposed symmetrically with respect to the vertical plane passing through the lower end of the outlet channel 65. In the suction pipe 66, an air volume adjustment damper 67 is disposed which takes in the outside air into the transport air flow midway along the path to adjust the transport amount of the powder particles.

  As described above, in the rotation shaft 62 a of the screw 62, the extrusion portion 62 b is formed above the portion separated from the bottom portion 61 a of the casing 61 by the predetermined length a, but the outlet 64 is an extrusion of the screw 62 It arrange | positions below the part 62b (The bottom part 61a side of the casing 61 from the extrusion part 62b of the rotating shaft 62a).

  In the measuring and mixing device 1, an operation of collecting the powdery particles remaining in the feed hopper 6 will be described based on FIG.

  In the measuring and mixing apparatus 1, as a circuit for collecting the powdery particles remaining in the feed hopper 6, as shown in FIG. 6, the suction port 65b of the takeout flow path 65 of each of the four feed hoppers 6 They are connected to the suction devices 67 respectively. A switching valve 66 a is disposed in the suction pipe 66. A recovery tank 68 is disposed between the takeout flow path 65 of each of the four supply hoppers 6 and the suction device 67.

  Therefore, in order to recover the powder and granular material remaining in the feed hopper 6, the suction device 67 is operated with the switching valve 66a corresponding to the supply hopper 6 for recovering the powder and particulate material open. As a result, the air inside the takeout flow path 65 of the supply hopper 6 is sucked, and the powder and granular material remaining in the supply hopper 6 is recovered to the recovery tank 68 via the takeout flow path 65 and the suction pipe 66.

  In the supply hopper 6 of the present embodiment, an outlet 64 communicating the inside of the casing 61 with the outlet flow path 65 is formed in the vicinity of the lower end of the casing 61. A suction port 65b to be connected is formed. Therefore, when the operation is finished in a state in which the granular material remains in the casing 61, the granular material remaining in the casing 61 can be suctioned from the suction port 65b via the extraction flow path 65. Therefore, it is possible to reduce waste of the powdery particles remaining in the casing 61 and efficiently collect the powdery particles remaining in the casing.

  In the supply hopper 6 of the present embodiment, an inlet port 65 a for introducing an air flow is formed in the takeout flow path 65. Therefore, when the granular material is sucked from the suction port 65 b through the extraction flow path 65, an air flow is introduced into the extraction flow path 65 through the introduction port 65 a. Therefore, the powder and granular material remaining in the casing 61 can be efficiently sucked from the suction port 65 b via the extraction flow passage 65.

  In the supply hopper 6 of the present embodiment, the extraction flow passage 65 is formed along the lower portion of the casing 61, the inlet 65a is disposed at one end of the extraction flow passage 65, and the suction port 65b is the extraction flow passage 65. Placed on the other end of the Therefore, in the extraction flow passage 65, the introduction port 65a and the suction opening 65b are disposed apart from each other, whereby the powder and granular material remaining in the casing 61 is efficiently suctioned from the suction opening 65b via the extraction flow passage 65. can do.

  In the feed hopper 6 of the present embodiment, the inlet 65 a and the suction port 65 b are disposed above the outlet 64. Therefore, when suction from the suction port 65b of the takeout flow path 65 is not performed by disposing the introduction port 65a and the suction port 65b above the takeout port, the powder particles in the takeout flow path 65 It can suppress that it is pushed out to the introduction port 65a and the suction port 65b.

  In the supply hopper 6 of the present embodiment, the inlet 65 a and the suction port 65 b are disposed symmetrically with respect to the vertical plane passing through the lower end of the extraction flow path 65. Therefore, the introduction port 65a and the suction port 65b can be reversed, and the suction pipe 66 can be easily attached to the suction port 65b.

  In the feed hopper 6 of the present embodiment, the screw 62 is disposed to be inclined, and the outlet 64 is disposed below the extrusion portion 62 b formed on the outer periphery of the screw 62. Therefore, when the suction from the suction port 65 b of the extraction flow passage 65 is not performed, it is possible to suppress that the powder and granular material in the casing 61 is pushed out to the extraction flow passage 65 from the pushing portion 62 b of the screw 62.

  In the measuring and mixing device 1 of the present embodiment, it is possible to reduce waste of powder particles remaining in the casing 61 in each of the plurality of supply hoppers 6 and efficiently collect powder particles remaining in the casing.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made within the scope of the claims. It is.

  In the above-described embodiment, the introduction port for introducing the air flow is formed in the extraction flow path, but the introduction port for introducing the air flow may not be formed in the extraction flow path.

  In the above-mentioned embodiment, although the extraction channel was formed along the lower part of a casing, it is not restricted to this.

  In the above embodiment, the inlet and the suction port are arranged symmetrically with respect to the vertical plane passing through the lower end of the extraction channel, but the arrangement of the inlet and the suction port may be changed.

  In the above embodiment, the outlet is always open, but the casing has an opening and closing member for opening and closing the outlet, and when the particulate matter is not suctioned from the suction port via the outlet channel. The outlet may be opened by the opening / closing member when the outlet is closed by the opening / closing member and the powder is sucked from the suction port through the outlet flow path.

1 metering and mixing device 6 supply hopper (supply device)
61 Casing 62 Screw 62b Extrusion part 64 Extraction port 65 Extraction path 65a Introduction port 65b Suction port 67 Suction device

Claims (8)

A casing for containing particulate matter;
A screw disposed inside the casing and extruding the granular material;
And an outlet channel disposed outside the lower portion of the casing and configured to be in communication with the interior of the casing,
In the vicinity of the lower end of the casing, an outlet for communicating the inside of the casing with the extraction passage is formed.
A supply device characterized in that a suction port connected to a suction device is formed in the takeout flow path.   The supply device according to claim 1, wherein an introduction port for introducing an air flow is formed in the extraction flow path. The takeout channel is formed along the lower part of the casing,
3. The supply device according to claim 2, wherein the inlet is disposed at one end of the extraction channel, and the suction port is disposed at the other end of the extraction channel.   The supply device according to claim 3, wherein the inlet and the suction port are disposed above the outlet.   5. The supply device according to claim 4, wherein the inlet and the suction port are disposed symmetrically with respect to a vertical surface passing through the lower end of the extraction flow channel. The screw is arranged to be inclined,
The feeder according to any one of claims 1 to 5, wherein the outlet is disposed below an extrusion portion formed on an outer periphery of the screw.   The supply device according to claim 1, wherein the casing has an opening and closing member for opening and closing the outlet.   A metering and mixing device comprising a plurality of the feeding devices according to any of claims 1-7.

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