JP2502429B2 - Measuring device for powder and granular material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powdery or granular material feeder for measuring powdery or granular material such as synthetic resin and supplying it to, for example, an injection molding machine.

[0002]

Conventionally, metering equipment of the granular material is, for example, as shown in FIG. 6, a suction type hopper A receiving material receiving the powdered or granular material fed by the air transport, the material feed hopper B Are provided in a layered manner, a screw conveyor C for driving the motor M is provided under the material hopper B, and the tip of the supply side of the screw conveyor C is made to face the upper opening of the weighing hopper D. The material supplied from the conveyor C is weighed by the weighing hopper D, and the material weighed by the weighing hopper D is fed to the mixer E provided below the weighing hopper D. still,
At the lower part of the material receiving hopper A, for example, a rotary feeder F that can make the inside of the material receiving hopper A airtight and discharge the material received by the hopper A to the material supply hopper B is provided. The material receiving hopper A for storing the material stored in the material tank by suction type pneumatic transportation
I am trying to send it to. Further, the material supply hopper B is provided with a level switch (not shown), and the operation of the level switch causes the rotary feeder F to operate when the level of the material in the material supply hopper B falls below a predetermined height. ing. It should be noted that G is an air transport pipe for the powder or granular material connected to the material tank, and H is a suction pipe connected to a suction device (not shown).

[0003]

By the way, in general,
Regarding the quality of molded products such as synthetic resin, it is used for molded products.
It is determined according to the measurement accuracy of a plurality of synthetic resins and the like.
And to measure multiple synthetic resins with high accuracy,
Supplying synthetic resin, etc. to the weighing machine as well as the weighing means of the weighing machine
High-precision feeding means is also necessary for the feeding means of the feeder.
It will be important.

[0004] However, the above-mentioned conventional powder and granular material measuring
In the feeder, since the powdery or granular material of the material supply hopper B is supplied to the weighing hopper D by the screw conveyor C, the powdery or granular material is supplied depending on the stop position of the screw conveyor C with respect to the opening of the weighing hopper. There is a problem that a large error occurs in the quantity. That is, since the screw conveyor C feeds the granular material in the spiral groove portion, when the screw conveyor C is stopped, the supply of the granular material is immediately stopped depending on the stop position of the screw conveyor C with respect to the weighing hopper opening. In some cases, the unspecified amount of the granular material accumulated in the spiral groove portion of the screw conveyor C may fall naturally,
Therefore, a large error occurs in the supply amount to the weighing hopper.

[0005] Further, in the above metering device of a conventional granular material, when metering the plurality of kinds of material by the metering hopper D, a plurality of materials, for one weighing hopper D as shown in FIG. 6 After the supply hopper B is provided and one end of the supply side of the screw conveyor C provided in each of the material supply hoppers B faces the upper opening of the weighing hopper D, one kind of material is weighed and then the weighed material is weighed. It is possible to measure and supply another one kind of material after that, but since the screw conveyor C is used to supply the material from the material supply hopper B to the measuring hopper D as described above, There is a limit to the number of screw conveyors C that can be mounted on one weighing hopper D. Therefore, when weighing various materials, a plurality of weighing hoppers must be installed. If there is a need to, there is a problem that the equipment cost is high.

Moreover, the screw conveyor C is a motor M.
Since it is driven by, that is, it has a driving part, there are many mechanical troubles, maintenance is required, and when changing the type of material to be weighed by the weighing hopper D, it is necessary to clean the screw conveyor C. But,
The cleaning is difficult and time-consuming, the material change takes a long time, and the operation rate of the device is deteriorated.

An object of the present invention is to improve the accuracy of feeding the powdery or granular material in the material supply hopper to the weighing hopper, and to weigh plural kinds of powdery or granular material with one weighing hopper. In addition to the above, it is an object of the present invention to provide a metering and feeding device that can be easily cleaned when changing materials, can be done in a short time, and can be maintenance-free, and that the structure is simple and the cost can be reduced.

[0008]

In order to achieve the above object, the invention according to claim 1 is a weighing hopper 1 to be weighed by a weighing means, and a material feeding hopper for feeding a powdery or granular material to the weighing hopper 1. 2 is provided at the bottom of the material supply hopper 2, and a material supply pipe 3 that is open to the bottom and the weighing hopper 1 and is not fixed to the weighing hopper 1 is provided. A compressed fluid is blown into the opening to the inside, and the granular material in the material supply hopper 2 is pushed out to the material supply pipe 3 by the compressed fluid and supplied to the weighing hopper 1 via the material supply pipe 3. a fluid pumping tube 4 is provided, while the exhaust port 18 Ru is opened to the metering hopper 1, powder to the material feed hopper 2
When supplying the granular material, the tip of the material supply pipe 3 is closed.
Meanwhile, at the time of supplying the granular material to the weighing hopper 1,
While opening the tip of the material supply pipe 3,
A valve 32 that collides with the granular material supplied to the hopper 1.
Is provided at the tip of the material supply pipe 3 .

The invention according to claim 2 is the same as claim 1.
In the invention described above, a discharge port is provided at the bottom of the material supply hopper 2.
15 were provided.

The invention according to claim 3 is the same as claim 1 or
Is a plurality of material supply hoppers 2 ...
The material supply pipes 3 provided in each of the material supply hoppers 2 are opened in one weighing hopper 1.

Further, the invention according to claim 4 is the same as claim 3.
In the above-mentioned invention, the weighing hopper 1 is provided with one material supply cylinder 6 above the hopper 1, and each material supply pipe 6 provided in the plurality of material supply hoppers 2 is opened.

[0012]

According to the first aspect of the present invention, the granular material in the material supply hopper 2 is pushed out to the material supply pipe 3 by blowing a compressed fluid from the fluid pressure supply pipe 4 into the material supply pipe 3, and can be supplied to the weighing hopper 1 via the material supply pipe 3, moreover, the supply of the powdered or granular material, since performed using the pressure of the compressed fluid, to provide a metering device of high accuracy, further, the Valve 3 provided at the tip of material supply pipe 3
2 is when the powder material is supplied to the material supply hopper
Since the tip of the material supply pipe is closed, the weighing hook is closed.
It is possible to prevent the above materials from entering the par and
When the material is supplied to the weighing hopper 1, the above-mentioned weighing hopper is used.
-1 is supplied to the valve 32 together with compressed air.
Due to the collision, the material floats in the weighing hopper 1.
Since it will fall without being used, it is possible to further reduce the supply error.
The measurement accuracy can be further improved.

Then , a compressed fluid is blown in to push out the granular material in the material supply hopper 2 to the material supply pipe 3,
Since the material is supplied to the weighing hopper 1 through the material supply pipe 3, the material can be supplied only by opening the material supply pipe 3 in the weighing hopper 1. Therefore, one kind of the weighing hopper 1 has three or more kinds. Of plural kinds of materials can be measured, and when changing the kind of the material to be measured, the material remaining in the material supply pipe 3 can be swept away by idling the compressed fluid from the fluid pressure feeding pipe 4. Therefore, cleaning can be performed easily and in a short time. Further, unlike a screw conveyor, since it does not have a drive unit, maintenance is not required and the structure can be simplified, and the cost can be reduced accordingly.

According to the second aspect of the invention, the material is supplied.
Since the discharge port 15 is provided at the bottom of the hopper 2, weigh.
When changing the type of material, the material is supplied from the discharge port 15.
After discharging the material remaining in the feed hopper 2,
The material remaining in the supply pipe 3 is blown with compressed air to blow the material.
By cleaning the remaining material from the material supply pipe 3,
Cleaning can be done easily and in a short time.
It

[0015] In the invention of claim 3, further comprising a plurality of material supply hopper 2 ..., because the material supply pipe 3 provided in each of these materials feed hopper 2, respectively are opened in one of the weighing hopper 1, compressed fluid Since it is possible to supply materials from a plurality of material supply hoppers 2 to one weighing hopper 1 by using, it is possible to reduce the number of weighing hoppers 1 when weighing various kinds of materials and supplying them to, for example, a molding machine. Thus, the structure of the entire device can be simplified, and the cost can be reduced.

Further, in the invention according to claim 4 , one material supply cylinder 6 is provided above the weighing hopper 1, and each material supply pipe 6 provided in the plurality of material supply hoppers 2 is opened in the material supply cylinder 6. Since there is no restriction on the number of connected weighing hoppers 1, even if there are many kinds of materials to be weighed, it is possible to weigh all the materials with one weighing hopper 1. Therefore, the structure of the entire device can be simplified. It is possible to further reduce the cost.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The metering and feeding apparatus for powder and granules of the first embodiment shown in FIGS. 1 and 2 supplies a metering hopper 1 having a material take-out port 11 at the bottom and a material for powder and granules to the metering hopper 1. Do 4
The base material supply hopper 2 is provided, and these four material supply hoppers 2 are arranged at equal intervals so as to surround the weighing hopper 1. In FIG. 1, for convenience of illustration, only two material supply hoppers 2 located symmetrically with respect to the weighing hopper 1 are shown, and the other two material hoppers 2 are omitted.

An air transport pipe 12 and a suction pipe 13 are connected to the upper side of each material supply hopper 2, and the suction action of the suction pipe 13 causes the material supply hopper 2 to flow from a material tank (not shown). In addition to allowing pneumatic transportation of the granular material, a discharge port 15 having an opening / closing valve 14 is provided at the bottom of the material supply hopper 2 to supply the granular material to the weighing hopper 1 as needed. I can take it out without doing it. In addition to the air, an inert gas fluid such as nitrogen may flow through the air transport pipe 12.

Further, at the bottom of the material supply hopper 2 and above the on-off valve 14, a material supply pipe 3 having a base end opening to the bottom and a distal end formed obliquely is provided horizontally. Connect the tip of the supply pipe 3 to the opening 1 of the weighing hopper 1.
6, a tip end portion of a nozzle 41 connected to a fluid pressure feed pipe (hereinafter referred to as an air pressure feed pipe) 4 of a compressed fluid for feeding an inert gas such as nitrogen or air in a horizontal manner from the material supply hopper 2 Of the nozzle 41
From 0.5 to 3 kg / cm at the opening of the material supply pipe 3
For example, about 2 compressed air is blown into the material supply hopper 2, and the compressed air is used to move the powder material into the material supply pipe 3
So that the material can be supplied to the weighing hopper 1 through the material supply pipe 3. The material supply pipe 3
Is made to enter the inside of the weighing hopper 1 so as not to come into contact with the opening 16, in other words, not to be fixed to the weighing hopper, so as not to hinder the weighing of the material by the load cell 17 described later.

Further, a support pin 31 is provided on the upper outer periphery of the tip of the material supply pipe 3 formed obliquely, and further protrudes from the tip and bends upward, and a valve 32 is rocked on the support pin 31. Also, when the powdery or granular material is pneumatically transported into the material supply hopper 2 by the suction action of the suction pipe 13, it is supported so as to be tiltable with respect to the axial direction, and responds to the suction force sucked by the suction pipe 13. The valve 32 closes to close the tip of the material supply pipe 3, and when compressed air is supplied to the measuring hopper 1, the valve 32 opens to open the tip of the material supply pipe 3. In addition, the valve 32 becomes a collision body of the material when the material is supplied, and the material can be dropped downward without floating.

The load cell 17 is provided in the weighing hopper 1 so that the material supplied to the weighing hopper 1 can be weighed by the load cell 17, and the upper portion of the weighing hopper 1 is provided with a filter 18a. An exhaust pipe 1 which opens the exhaust port 18 and communicates with the exhaust port 18.
The compressed air blown into the weighing hopper 1 from the nozzle 41 via the nozzle 9 can be discharged.

Further, as shown in FIGS. 1 and 2, an air cylinder 21 is suspended in a suspended manner from a support arm 20 in the central portion of the inside of the weighing hopper 1 and is connected via a connecting member 22. The material outlet 11 can be opened / closed by the vertical movement of a conical valve body 23 connected to the valve 21, and the measured powder / granular material is taken out by the opening operation of the valve body 23 and molded, for example, via a mixer. So that it can be supplied to the machine.

Further, the solenoid valve 4 having the load cell 17 on the input side and the pneumatic feed pipe 4 on the output side.
A controller 50 to which 2 is connected is provided, and the electromagnetic valve 42 is opened / closed in accordance with an instruction from the controller 50 to detect the weight of the granular material in the weighing hopper 1 from the material supply hopper 2 to the weighing hopper 1. Since the amount of the granular material to be supplied can be controlled, the granular material can be accurately supplied even if the pressure of the compressed air is a constant pressure, but it can be supplied more by controlling the pressure. The accuracy can be improved.

Reference numeral 24 is a flexible tube which shields the inside of the weighing hopper 1 from communicating with the outside air through the opening 16.

Next, the operation of the first embodiment constructed as described above will be explained.

The material is transported to each material supply hopper 2 through the air transport tube 12 by suction from the suction tube 13, and at this time, the tip of the material supply tube 3 communicating with the material supply hopper 2. Valve 32 provided in the section
However, since the tip portion of the material supply pipe 3 is closed, the material can be transported to the material supply hopper 2 through the air transport pipe 12, and it is not necessary to provide a material receiving hopper as in the conventional case, and the device is accordingly. The whole can be simplified, the cost can be reduced , and the material supply pipe 3 can be used.
The valve 32 provided at the tip of the
The tip of the material supply pipe is closed when supplying the granular material.
Therefore, the material may enter the weighing hopper carelessly.
Can be prevented, and the feeding accuracy to the weighing hopper can be improved.
You can go up.

With the material inserted into each material supply hopper 2, the solenoid valve 42 corresponding to the material supply pipe 3 for supplying the material to be weighed is opened according to the instruction of the controller 50, and the nozzle 41 is opened. The material to be weighed can be pushed out into the material supply pipe 3 by blowing compressed air into the opening of the material supply pipe 3 into the material hopper 2, and can be supplied to the weighing hopper 1 through the material supply pipe 3. Of. Further, as described above, the material is supplied to the weighing hopper 1 by pushing out with air. Therefore, even if vibration occurs due to the material supply to the weighing hopper 1, this vibration can be constant, and thus the error due to this vibration is The correction can be made by the calculation by the controller 50, and the weighing accuracy can be improved as compared with the conventional example using the screw conveyor.

Further, at the time of supplying the material to the weighing hopper 1, the material collides with the valve 32 together with the compressed air, so that the material is dropped without floating in the weighing hopper 1, and the weighing accuracy can be improved accordingly.

The material fed to the weighing hopper 1 is weighed by the load cell 17, and the material to be weighed is continuously fed to the weighing hopper 1 according to the instruction of the controller 50 until a predetermined weighing value is reached. The material weighed in this way is taken out from the material take-out port 11 by the opening operation of the valve body 23 that moves up and down in the cylinder 21 every time the material is weighed. It should be noted that, for example, the weights of the individual types of materials may be calculated by adding up the weights of the four types of materials. In this case, the state in which the four types of materials are mixed by the opening operation of the valve body 23 is performed. Then, the material is taken out from the material take-out port 11 at once.

When changing the kind of material to be weighed, the material remaining in the material supply hopper 2 is discharged from the discharge port 15 and then the material remaining in the material supply pipe 3 is blown with compressed air. The material supply pipe 3 can be easily cleaned by sweeping the material supply pipe 3 by means of the above method. A desired kind of material is inserted from the air transport pipe 12 into the once empty material supply hopper 2, In preparation for weighing by the weighing hopper 1.

When the material is replenished from the air transport pipe 12 to the material supply hopper 2 communicating with the material supply pipe 3 in a state where the material remains in the material supply pipe 3, Since the inside pressure becomes negative and the valve 32 can close the tip of the material supply pipe 3, the material can be supplied to the material supply hopper 2 by suction, and the material supply hopper can be supplied as in the conventional example. It is possible to eliminate the need for using a material receiving hopper separately from 2, and to simplify the structure accordingly.

According to the first embodiment configured as described above, the solenoid valve 42 corresponding to the material supply pipe 3 for supplying the material to be weighed by the output of the controller 50 is opened, and the pneumatic feed pipe 4 is opened. Since the material to be weighed can be supplied from the material supply hopper 2 to the weighing hopper 1 via each material supply pipe 3 using compressed air from, the one weighing hopper 1 measures four kinds of materials. It is possible.

When changing the kind of material to be weighed, the material remaining in the material supply hopper 2 is discharged from the discharge port 15 and then the material remaining in the material supply pipe 3 is blown with compressed air. Therefore, the material supply pipe 3 can be swept away for easy and short-time cleaning, and since there is no drive unit such as a screw conveyor, maintenance is unnecessary and the structure can be improved. It can be done easily and cost can be reduced accordingly.

Further, the material supply pipes 3 respectively provided in the four supply hoppers 2 are opened in one weighing hopper 1,
Since the material can be supplied to the weighing hopper 1 by using compressed air, when four kinds of materials are weighed and supplied to, for example, a molding machine, the number of the weighing hoppers 1 can be reduced and the structure of the entire apparatus can be simplified. Therefore, the cost can be reduced.

In the first embodiment described above, four material supply hoppers 2 are arranged around the weighing hopper 1, but four or more, for example, eight material supply hoppers 2 are used as shown in FIG. A second embodiment using eight material supply hoppers 2 will be described.

Each supply hopper 2 provided with a level switch
In addition, the raw material tanks 71 to 76 for storing the main raw material and the auxiliary raw material tanks 77, 78 for storing the master batch are connected to each other via the air transport pipe 12, and the suction pipe 13 is connected.
Is connected via each on-off valve 26, and the main raw material and the sub-raw material can be supplied to each supply hopper 2 via each air transport pipe 12 by the opening operation of each on-off valve 26.

Further, at the bottom of each material supply hopper 2,
The material supply pipes 3 provided with the pneumatic feed pipes 4 having the electromagnetic valves 42 are respectively provided so that the material can be discharged from the respective material supply hoppers 2 by utilizing the compressed air at the opening operation of the respective electromagnetic valves 42.

Further, one material supply cylinder 6 is provided above the weighing hopper 1, and the weighing hopper 1 and the material supply cylinder 6 are connected via a flexible tube 27, and the material is supplied from each material supply pipe 3 to the material. The material supplied to the supply cylinder 6 is allowed to drop into the weighing hopper 1, and each of the material supply cylinders 6 is provided with an extended tip portion of each material supply pipe 3 as shown in FIG. Open toward the center and each solenoid valve 4
By blowing compressed air into each material supply pipe 3 by the opening operation of 2, the main raw material and the auxiliary raw material are pushed out from each supply hopper 2 to the material supply pipe 3, and through the material supply pipe 3 and the material supply pipe 6. I am trying to do it.

Further, an exhaust port 18 is opened above the material supply cylinder through a filter 18a, and the exhaust port 18 is opened.
The compressed air is discharged via the. Further, as shown in FIG. 4, the diameter of each material supply pipe 3 opened in the material supply cylinder 6 is changed according to the amount of material used, but the diameter may be the same.

Further, as shown in FIG. 5, each material supply pipe 3
The material supply pipes 3 are inserted into the material supply pipes 6 such that the tip end portions of the are formed at right angles and the tip end portions are inclined downward. The material supply pipes 3 are inserted into the material supply pipes 6. A support pin 62 whose tip is bent upward is provided on the inner peripheral wall immediately above the plunging portion, and an oval valve 61 is supported on the support pin 62 so as to be swingable and tiltable with respect to the axial direction. , Each material supply hopper 2 as in the first embodiment
When pneumatically transporting the material into the inside, the valve 61 closes the tip of each material supply pipe 3, and at the time of supplying the material to the material supply cylinder 6 by compressed air, the valve 61 causes the material supply pipe 3 to move. The tip end of the is opened and becomes a colliding body of the material so that the material is dropped onto the weighing hopper 1 without floating.

Further, the control panel 80 accommodating the controller 50 is provided with a setting device 81 for setting the weights of the main raw material and the auxiliary raw material, and the setting device 81 is used to set each raw material tank 71 to 76.
Also, by setting the measured values of the materials supplied from the auxiliary material tanks 77 and 78, it is possible to measure different amounts of the main materials and the auxiliary materials of different types. Incidentally, FIG.
Then, the eight material supply pipes 3 are radially arranged at the same height in the material supply pipe 6, but they may be arranged at different heights. In this case, the material supply pipes 3 to be projected into the material supply pipe 6 are arranged. The number of can be further increased.

According to the second embodiment configured as described above, the use of the material supply cylinder 6 makes it possible to eliminate the restriction on the number of connected material supply hoppers 2, so that the material to be weighed is the main raw material 6. Even if there are 8 kinds of seeds and 2 kinds of auxiliary raw materials, or more than 8 kinds, it is possible to measure 8 kinds or more of materials by one weighing hopper 1, and therefore the structure of the entire apparatus becomes simpler. The cost can be further reduced.

Further, each material supply pipe 3 is connected to the material supply cylinder 6
Since the valve 61 is provided at the tip end of the material supply pipe 3, it is not necessary to form the tip end of each material supply pipe 3 obliquely, and each material supply pipe 3 can be simply manufactured. Further, since the diameter of each material supply pipe 3 is changed according to the amount of material used, the material supply cylinder 6 is correspondingly changed.
It is also possible to increase the number of material supply pipes 3 connected to.

[0044]

As described above, according to the first aspect of the invention,
According to the description, the weighing hopper 1 to be weighed by the weighing means and the material supply hopper 2 for supplying the granular material to the weighing hopper 1 are provided, and the bottom of the material supply hopper 2 and the weighing hopper 1 are provided. A material supply pipe 3 that is not fixed to the weighing hopper 1 is provided, and a compressed fluid is blown into the opening of the material supply pipe 3 into the material supply hopper 2 so that the compressed fluid inside the material supply hopper 2 The fluid pressure feed pipe 4 for extruding the powdery or granular material into the material feed pipe 3 and feeding it to the weighing hopper 1 through the material feed pipe 3.
The Because provided, it can provide a metering device of high accuracy, further
In addition, the valve 32 provided at the tip of the material supply pipe 3 is
When supplying the granular material to the material supply hopper,
Since the tip of the feeding pipe is closed,
The material can be prevented from entering, and the weighing
When the material is supplied to the par 1, it is supplied to the weighing hopper 1.
Material impinges on the valve 32 with the compressed air.
Therefore, the material does not float in the weighing hopper 1.
Since it falls, the supply error can be further reduced,
It is possible to further improve the weighing accuracy , and moreover, since the granular material is supplied from the material supply hopper 2 to the weighing hopper 1 using the compressed fluid, one weighing hopper 1 can measure a plurality of kinds of materials. can do.

Further, when changing the kind of the material to be measured, the material remaining in the material supply pipe 3 can be swept away by blowing the compressed fluid from the fluid pressure supply pipe 4, so that the material supply pipe 3 is cleaned. Can be performed easily and in a short period of time, and since it does not have a drive unit such as a screw conveyor, maintenance can be eliminated and the structure can be simplified, and the cost can be reduced accordingly. .

According to the second aspect of the invention, the material is supplied.
Since the discharge port 15 is provided at the bottom of the hopper 2,
When changing the type of material to be weighed, first
The material remaining in the material supply hopper 2 is discharged from 15
Then, the material remaining in the material supply pipe 3 is emptied of compressed air.
By blowing one of the material remaining from the material supply pipe 3 sweep
Can be done easily and in a short time.
Can be cleaned.

[0047] According to the invention of claim 3, further comprising a plurality of material supply hopper 2 ..., because the material supply pipe 3 provided in each of these materials feed hopper 2, respectively are opened in one of the weighing hopper 1, Since it is possible to supply materials from a plurality of material supply hoppers 2 to one weighing hopper 1 by using a compressed fluid, the number of weighing hoppers 1 can be adjusted when a large number of materials are weighed and supplied to, for example, a molding machine. The number of devices can be reduced, and the structure of the entire device can be simplified, so that the cost can be reduced.

Further , according to the invention described in claim 4, the weighing hopper 1 is provided with one material supply cylinder 6 above the hopper 1, and each of the plurality of material supply hoppers 2 is provided in the material supply cylinder 6. since the material supply pipe 3 was opened,
By using one material supply cylinder 6, there is no restriction on the number of material supply pipes 3 connected to the weighing hopper 1, and even if there are many kinds of materials to be weighed, one weighing hopper 1 can measure all kinds of materials. Therefore, the structure of the entire apparatus can be simplified and the cost can be further reduced.

[0049]

[Brief description of drawings]

FIG. 1 is a device layout view schematically showing a powder and granular material metering and feeding device according to the present invention.

FIG. 2 is a layout view showing a planar layout of the tip of each material supply pipe in the weighing hopper.

FIG. 3 is a piping system diagram showing another embodiment.

FIG. 4 is an arrangement diagram showing a planar arrangement of the tip of each material supply pipe in the material supply cylinder.

FIG. 5 is a partial cross-sectional view of a protruding portion of the material supply pipe into the material supply cylinder.

FIG. 6 is a device layout diagram illustrating a conventional problem.

[Explanation of symbols]

1 Measuring Hopper 2 Material Supply Hopper 3 Material Supply Pipe 4 Fluid (Air) Pressure Pipe 6 Material Supply Cylinder 11 Material Outlet 15 Discharge Port 18 Exhaust Port 32 Valve

Claims (4)

(57) [Claims] 1. A weighing hopper 1 which is weighed by a weighing means.
And a material supply hopper 2 for supplying the granular material to the weighing hopper 1, the bottom of the material supply hopper 2 is open to the bottom and the weighing hopper 1, and the material is not fixed to the weighing hopper 1. A supply pipe 3 is provided, and a compressed fluid is blown into the opening of the material supply pipe 3 into the material supply hopper 2 so that the granular material in the material supply hopper 2 is supplied to the material supply pipe 3 by the compressed fluid. Push it out,
A fluid pressure feeding pipe 4 for supplying to the weighing hopper 1 through the material feeding pipe 3 is provided, and an exhaust port 18 is provided in the weighing hopper 1.
While Ru is opened, when the supply of the powdered or granular material into the material feed hopper 2, the
The weighing hopper is closed while the tip of the material supply pipe 3 is closed.
-When the powder or granular material is supplied to the tip of the material supply pipe 3
The part is opened and supplied to the weighing hopper 1.
A valve 32 that collides with the granular material is provided at the end of the material supply pipe 3.
A powder and granular material metering and feeding device characterized in that it is provided at the end . 2. A discharge port 15 at the bottom of the material supply hopper 2.
The powdery- or granular-material measuring and feeding device according to claim 1, further comprising: Wherein a plurality of the material supply hopper 2 ..., and claim 1 of the material supply pipe 3 provided in each of these material supply hopper 2 respectively is opened in one of the weighing hopper 1
Is a powder and granular material metering device according to claim 2 . 4. The weighing hopper 1 is provided with one material supply cylinder 6 above the hopper 1, and each material supply pipe 3 provided in the plurality of material supply hoppers 2 in the material supply cylinder 6.
The powdery and granular material measuring and feeding device according to claim 3 , wherein the opening is provided.