JP2005262026A - Apparatus for agitating powder or granular material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple apparatus for agitating a powder or granular material efficiently. <P>SOLUTION: This apparatus is used for agitating two or more kinds of powder or granular materials and has three or more horizontal members fit perpendicularly to a rotary shaft and an agitation blade fit perpendicularly to each of the horizontal members. The agitation blade is composed of a metal plate which is long in the vertical direction and has a certain angle with respect to the horizontal direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for stirring powder particles.

  Agitation of the powder particles is an operation performed to uniformly mix a plurality of types of powder particles. For example, in the case of a solid-phase reaction, since the reaction between solids depends on the number of contact with each other, it is required to mix as uniformly as possible. Further, even when mixing non-reactive pigments or the like, color unevenness occurs unless they are mixed uniformly. In addition, various materials require uniform mixing of the granular materials.

As a stirring device for such mixing, there are a screw type, a vibration type, a type that rotates a stick or a vane, and the like.
The screw type is a type in which the screw rotates and is most often used. However, it takes time because the central portion of the screw is hardly stirred.

  Moreover, complete stirring is impossible with the vibration type. Furthermore, in the type in which the stick or vane is rotated, stirring in either the horizontal direction or the vertical direction is hardly possible. In addition, the rotational resistance increases.

  In the first place, unlike a liquid, a granular material is difficult to uniformly stir (also mix). Not only stirring and mixing due to natural diffusion does not occur, but the more the difference in specific gravity and size, the more difficult it becomes.

There exists a thing described in patent document 1 as a stirring apparatus in consideration of such difficulty. In this, a spiral blade and a paddle type stirring blade are provided and rotate simultaneously. It is characterized in that the powder is stirred up and down by the spiral blade.
However, the mixing effect is also small because the mixing of the central part is poor and the spiral blades penetrate so as to cut the powder.
Japanese Patent Laid-Open No. 06-154572

  Therefore, a simple apparatus that can efficiently stir powders and granules is provided.

  In view of the current situation as described above, the present inventor has completed the agitation apparatus of the present invention as a result of earnest research, and the feature of the present invention is that a plurality of types of powder are agitated. 3 or more horizontal members are provided at right angles to the rotation axis, and stirring blades are provided at right angles to the horizontal members, the stirring blades being long in the vertical direction and having an angle in the horizontal direction. It is in the point comprised with the plate material.

Here, the granular material may have any physical or chemical properties. It may be liquefied, vaporized or decomposed during mixing. The size of the granular material is not limited, but usually about 0.01 to several mm is suitable.
Examples of such granular materials include sand, stone powder, catalyst particles, powders such as plastic and rubber, and crushed products, but any other type may be used. Of course, a plurality of these may be mixed.

  The rotation axis is usually provided vertically, but may be slightly inclined. This shaft may be driven by a normal drive source such as a motor or engine. The drive may be from either up or down.

  The rotating shaft is provided with three or more horizontal members (preferably 4 to 5). The horizontal material itself has a slight stirring effect, but the root is for fixing and rotating the stirring blade. The horizontal member may be any shape such as a plate shape or a pipe shape. In the case of three horizontal member attachment positions, it is preferable that one interval be narrowed, such as 40 degrees, 160 degrees, and 160 degrees, instead of an equal position with an interval of 120 degrees. In the case of four, it is preferable that three are evenly arranged at intervals of 120 degrees, and the other one is located somewhere (not necessarily intermediate). Regardless of the number, it is better to have non-uniformity than to arrange them all evenly. Of course, it is not limited to such a position, but it is preferable.

  The reason why such a positional relationship is favorable is that the crests formed at the front portion thereof are not made uniform by the agitating blade described later, but have a difference in size. If it does in this way, a granular material will flow from a big mountain to a small mountain, and stirring efficiency will go up.

  A stirring blade is provided on the horizontal member. The stirring blade is a main body for stirring the powder particles. In the present invention, the stirring blade is a substantially linear member provided at a right angle to the horizontal member. Therefore, it is substantially vertical. This linear material is composed of a plate material having an angle in the horizontal direction. Something like an angle is preferred. This is formed by joining two plate materials (not a manufacturing method) at right angles to the longitudinal direction. In the present invention, not only a right angle but also a smaller angle (up to about 60 degrees) or a larger angle (up to about 120 degrees) may be used. Moreover, the shape like the channel which joined 3 sheets may be sufficient. Further, it may have a shape protruding in three directions, for example, a T-shaped section in which a plate is joined to an angle, a Y-shaped section, or the like.

  Such a shape is formed and rotated with the joining line in front. This is because a vacuum part (in an extreme case) is formed on the rear side in the traveling direction, and the powder is entrained there. This increases the mixing effect. In particular, in the normal case, it is possible to stir up and down which hardly occurs. As a result, the center portion and the surrounding portion are exchanged, and the powder particles are often replaced in the center portion that is usually difficult to stir.

The lengths of the stirring blades may all be the same, but it is better to have a difference. This is also because the crests formed in the front part of the agitating blade are not made uniform, but have a difference in size. One or more stirring blades may be provided for one horizontal member.
The length may be determined according to the depth of the granular material to be filled, but the length (height) of at least about 70% of the filling depth is necessary. There is no problem even if it is longer than this.

The stirring device of the present invention has the following great advantages.
(1) Grains and powders that are difficult to mix can be easily mixed.
(2) The device is simple and inexpensive.
(3) There are no complicated movements and operations, so there are few failures and long life.

  Hereinafter, the present invention will be described in more detail based on preferred embodiments.

  FIG. 1 is a plan view showing an example of the stirring device 1 of the present invention. Four horizontal members 4 are bolted to a disc 3 fixed to the rotary shaft 2. The horizontal member 4 is plate-shaped and has a shape that matches the shape of the stirring blade 5. The stirring blade 5 has an angle or a shape in which a plate is joined to the angle. In this figure, the rotating shaft 2 rotates counterclockwise.

  FIG. 2 is a perspective view of FIG. It can be understood that the plate is joined to an angle or an angle. The shape of the horizontal member 4 may be a simple rectangle or a shape as shown in this figure.

FIG. 3 shows an example in which the stirring device 1 is attached to a cylindrical container 6 and particles to be mixed are introduced therein. A drive motor 7 is provided below the rotary shaft 2. In this state, it is stirred and mixed only by rotating the motor 7.
There is no problem even if the container itself is heated, other substances are added in the container, or various reactions are caused. On the other hand, it is a major object of the stirring apparatus of the present invention to make such a reaction quickly and efficiently.

  The particle filling surface 8 is slightly above the stirring blade 5. In this figure, there is a gap between the stirring blade 5 and the wall surface of the container 6, depending on the particle, there may be a case where it is better that there is almost no gap, or a case where there is a certain amount of gap.

  0.05 mm size (nominal) silica sand and 1.0 mm plastic piece were introduced into this container in the same amount (weight ratio). When the motor was rotated (rotation number: 60 rotations / minute), almost complete mixing was achieved in a few minutes. This shows that mixing efficiency is high.

It is a top view which shows an example of this invention apparatus. FIG. 2 is a perspective view of FIG. 1. It is sectional drawing which shows the usage example of one example of this invention apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 This invention stirring apparatus 2 Rotating shaft 3 Disc 4 Horizontal material 5 Stirring blade 6 Container 7 Motor 8 Filling surface

Claims (3)

  Agitating a plurality of types of granular materials, wherein three or more horizontal members are provided at right angles to the rotation axis, and stirring blades are provided at right angles to the horizontal members, the stirring blades being vertical A stirring apparatus for a granular material, characterized in that it is composed of a plate material that is long in the direction and has an angle in the horizontal direction.   The said horizontal material is four, and three of them are provided equally at an angle of 120 degrees, and the other one is provided somewhere in between. apparatus. The granular material stirring apparatus according to claim 1 or 2, wherein the horizontal member uses at least three kinds having different lengths.

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