JP4713619B2 - Storage tank for granular stirring and granular separation system - Google Patents

Description

  The present invention relates to a granule agitation storage tank capable of efficiently separating foreign matters mixed in a granule and a granule separation system using the same.

  In recent years, resin products have been required to have high quality, and before supplying granules such as pellets as raw materials to various molding machines such as injection molding machines, dust and the like adhering to the granules There is a demand for technology for removing foreign substances. In other words, particles such as pellets are attached with fine particles such as dust that are generated when they collide with each other, and foreign matters such as dust contained in the air. Need to be separated from.

When separating a minute foreign substance from a granule, it is common to remove the granule during air transportation as in the “powder removing device” disclosed in Patent Document 1.
JP 2007-50354 A

  However, if the foreign matter is removed from the particles during pneumatic transportation, the foreign matter must be separated from the particles once in a short time by the air for transportation.

  For this reason, in such a method, there are cases where the foreign matter mixed in the particles cannot be sufficiently separated and removed.

  This invention is made | formed in view of the problem which concerns, and it aims at providing the storage tank for granule stirring and granule separation system which can remove the foreign material mixed in the granule efficiently.

In order to achieve the above problem, the present invention provides, as a first aspect, a granule agitation storage tank in which granules are accommodated, the first space for accommodating the granules, and the first space, Are separated by a filter, and the granular material has a second space that cannot enter, a first structure part that forms the first space, and a second structure that forms the second space. The filter can be divided into a structure part, and the filter is provided between the first structure part and the second structure part, and is sandwiched so that a boundary part with the first structure part is flat. In the boundary portion between the filter and the second structure portion, a packing is sandwiched so that the second structure portion and the filter are in close contact with each other. The first structure portion accommodates an air intake port. It was and stirring means for the provided agitating the granules in the first space, the second structure What is the outlet air is provided, the holes of the filter is a long hole shape, to provide granules stirred for storage tank, characterized in that it is arranged along the flow of the granules It is.

  In order to achieve the above object, the present invention provides, as a second aspect, a granular material separation system using the granular stirring tank and the negative pressure generator according to the first aspect of the present invention. The negative pressure generated by the negative pressure generator causes the air in the second space to be discharged from the discharge port, thereby forming an air flow from the air intake port to the air discharge port. Of the foreign matter separated from the granular material in the first space, the one smaller than the filter hole is moved from the first space to the second space by the air flow and discharged from the air discharge port. A granular material separation system is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the storage tank for granule stirring and granule separation system which can remove the foreign material mixed in the granule efficiently can be provided.

  FIG. 1 shows a configuration of a powder removal system according to a preferred embodiment of the present invention. In the dust removing system, the suction blower 1 sucks air from the granule agitation storage tank 3 through a cyclone filter 2.

As shown in FIG. 2, the granule agitation storage tank 3 includes a tank body 31, an agitation blade 32, a filter 33, a packing 34, a suction box 35, and a lid 36.
In the granule agitation storage tank 3, an air suction port 312 is formed on the top surface by assembling the tank body 31 and the lid 36. The lid 36 is used in a closed state, but by adopting a detachable structure, the inside of the tank body 31 can be easily cleaned and the stirring blades 32 can be attached and detached. An opening 311 is formed in the tank body 31, and a filter 33 is installed so as to cover the opening 311. A packing 34 is disposed on the peripheral edge of the surface of the filter 33 opposite to the tank body 31, and the gap with the suction box 35 is sealed. A suction port 351 is provided in the suction box 35 and is connected to the cyclone filter 2 through a hose connected thereto.

  The filter 33 is easier to process if it is flat. In this case, as shown in FIG. 3A, a step is produced at the boundary with the tank body 31, and the particles staying there are retained. Your body may not be well agitated. Therefore, if necessary, it is preferable to adopt a configuration in which no step is generated as shown in FIG.

In FIG. 4, the storage tank for agitation of the granular material in an operating state is shown.
As the stirring blade 32 rotates, the particles are stirred in the tank body 31. By this stirring, the foreign matter adhering to the granules is separated from the granules and wound up in the tank body 31.

When the suction blower 1 is driven, a negative pressure is generated in the hose connected to the suction port 351, and the air in the suction box 35 is sucked out. As a result, the air pressure in the suction box 35 decreases, so that the air in the tank body 31 moves into the suction box 35 through the filter 33. Intake from outside the tank is taken into the tank body 31 through the air intake 312.
In this way, an air flow is formed which flows through the path of the air intake port 312 → tank body 31 → filter 33 → suction box 35 → suction port 351.

  Of the foreign matter wound up in the tank main body 31 together with the particles, foreign matter finer than the eyes of the filter 33 passes through the filter 33 along the air flow and moves into the suction box 35. In this way, the granules and foreign substances are separated.

  The shape of the hole of the filter 33 is generally circular or square. However, as shown in FIG. 5, the hole of the filter 33 has a long hole shape, and the air flow flowing from the air intake port 312 to the suction port 351 As shown in FIG. 6, an object smaller than the width of the filter hole is formed because the rod-like or fibrous foreign matter is less likely to collide with the frame-like portion between the filter holes. Easily passes through the filter hole.

  As shown in FIG. 7A, when the filter hole is circular or square, the object sucked by the filter 33 easily collides with the frame-shaped portion between the filter holes, so that the filter hole can be easily formed. I can't pass. On the other hand, as shown in FIG. 7B, when the filter is roughened in order to increase the removal efficiency of foreign matter, even objects (particles) of a size that is not desired to be removed pass through the filter 33. This is not preferable.

  In particular, as shown in FIG. 8A, rod-like or fibrous foreign matters are less likely to collide with the frame-like portion between the filter holes, and therefore can pass through the filter 33 efficiently. On the other hand, when the filter hole is circular or square as shown in FIG. 8B, the filter hole may collide with the frame portion between the filter holes depending on the direction of the foreign matter and pass through the filter 33 efficiently. I can't let you.

  The foreign matter that has moved into the suction box 35 is sucked into the hose from the suction port 351 together with air, and sent to the cyclone filter 2.

  The foreign matter sucked into the cyclone filter 2 is separated from the air flow by the cyclone effect.

  By continuing to stir the particles in the tank body 31, foreign substances that are firmly attached to the particles can be separated and removed.

In addition, the said embodiment is an example of suitable implementation of this invention, and this invention is not limited to this.
For example, in the above-described embodiment, the configuration in which the foreign matter sucked out together with the air from the suction port is removed by a cyclone filter, but may be removed by using a mesh filter.
Further, the positions and shapes of the illustrated filters are merely examples, and the present invention is not limited to these configurations.
Furthermore, in the said embodiment, although the structure which a tank main body and a suction box are separate was made into an example, these may be integrated.
As described above, the present invention can be variously modified.

It is a figure which shows the structure of the granule separation system which concerns on suitable embodiment of this invention. It is a figure which shows the structure of the storage tank for granule stirring. It is a figure which shows an example of the structure of the housing | casing part of a tank main body and a filter. It is a figure which shows the storage tank for particle | grain stirring in an operation state. It is a figure which shows the shape of a filter hole. It is a figure which shows the state in which only the object smaller than the width | variety of a filter hole passes a filter. It is a figure which shows the state in which the object smaller than a filter hole is bounced off by the filter, and the state in which the object of the magnitude | size which does not want to pass a filter passes a filter. It is a figure which shows the state in which an elongate object becomes easy to pass a filter by making a filter hole into a long hole shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction blower 2 Cyclone type filter 3 Granule stirring storage tank 31 Tank body 32 Stirring blade 33 Filter 34 Packing 35 Suction box 36 Lid 311 Opening 312 Air intake 351 Suction port

Claims (3)

It is a storage tank for stirring a particle in which the particles are stored,
A first space that accommodates the particles, and the first space is separated by a filter, and the particles have a second space that is inaccessible;
It can be divided into a first structure part that forms the first space and a second structure part that forms the second space;
The filter is provided between the first structure portion and the second structure portion, and is sandwiched so that a boundary portion with the first structure portion is flat,
At the boundary between the filter and the second structure portion, a packing is sandwiched so that the second structure portion and the filter are in close contact with each other.
The first structure part is provided with an agitation means for agitating the air intake and the accommodated particles in the first space,
The second structure part is provided with an air outlet,
The hole of the filter is in the shape of a long hole, and is arranged along the flow of the granular material. A granule separation system using the storage tank for stirring particles according to claim 1 and a negative pressure generator,
By discharging the air in the second space from the discharge port by the negative pressure generated by the negative pressure generator, an air flow from the air intake port to the air discharge port is formed,
Of the foreign matter separated from the granules in the first space by the stirring means, the one smaller than the hole of the filter is moved from the first space to the second space by the air flow, A granule separation system for discharging from the air discharge port. The granular material separation system according to claim 2 , wherein a powder removing device is provided between the granular material agitation storage tank and the negative pressure generating device.

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