JP2521110Y2 - Dry powder mixer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry particle dividing mixer in which powder to be mixed is tumbled in a rotary container to be pulverized and mixed and dispersed.

[0002]

2. Description of the Related Art Conventionally, a so-called ball mill has been used for pulverizing or mixing and dispersing wet or dry powder to be mixed such as inorganic powder and metal powder into fine particles. , V mixer, I mixer and the like are used. This dry powder mixer is usually equipped with a steel rotating container, and the powder to be mixed is simply put into the inside of the container, or together with balls such as cobblestones and porcelain balls, and the above-mentioned rotation is performed. Roll it inside as the container rotates,
The powder to be mixed is crushed or mixed and dispersed.

In this case, inside the rotary container, the inner wall surface is damaged due to friction and collision with the powder to be mixed and the balls, and metal powder comes out, which is mixed as an impurity in the powder to be mixed. May occur. In particular, in the case where such a mixture of impurities is disliked, in order to prevent this, as shown in FIG. 3, the mixer has a layer 12 of an elastic member such as a rubber sheet on the inner wall of the rotary container 11 thereof. A container material that does not pose a problem even if provided or mixed as an impurity is used.

[0004]

However, the powder to be mixed is pressed against the inner wall surface of the rotary container 11 by the ball, or due to the influence of static electricity, especially in the vicinity of the lifter bar 13. There was a problem in that it adhered to the surface of the inner wall surface, mainly, and as a result, it could not be pulverized into a homogeneous fine powder state or sufficiently mixed and dispersed.

Therefore, an automatic hammer is installed in the rotary container.
For example, a means for forcibly crushing by attaching such a device or a method for interrupting this during the mixing work is performed to remove a lump of powder or the like adhering to the surface of the inner wall surface. However, the former has a problem that the equipment is complicated and easily damaged,
The latter has the problem of poor work efficiency.

[0006]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and has a simple structure, in which a powder is prevented from adhering in the mixing process and can be uniformly crushed or sufficiently mixed and dispersed. It is intended to provide a mixer.

[0007]

Therefore, according to the present invention,
In the dry powder mixer, the powder to be mixed is put into the inside of the rotary container, and the powder to be mixed is tumbled in the process of rotation of the rotary container so as to be pulverized or mixed and dispersed.
An elastic sheet is disposed in the rotary container with a gap having a required width with respect to the inner peripheral wall thereof, and the powder to be mixed is rolled in the elastic sheet, and the elastic sheet is covered with the above-mentioned powder. When the load of the mixed powder is applied, the elastic sheet at that location is elastically deformed toward the void, and the void is filled,
When the load of the powder to be mixed is released, the original state is restored by the elastic restoring force, and the repulsion of this operation makes it possible to prevent the powder to be mixed from adhering to the elastic sheet. .

[0008]

By providing a space between the inner wall of the rotary container and the elastic sheet, the position of the elastic sheet that supports the powder to be mixed moves during the rotation of the rotary container. However, due to the elastic deformation toward the void at the position where the load is applied, the powder to be mixed can be prevented from adhering to the surface of the elastic sheet.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. In the drawings, reference numeral 1 is a rotary container of the mixer according to the present invention, and the inner peripheral wall of the rotary container 1 is
A plurality of lifter bars 3 are formed. Supported by this, a similar container-shaped elastic sheet 2 is disposed in the rotary container 1 from the inner peripheral wall surface through a desired gap 4.

As the material forming the elastic sheet, a material having rubber elasticity such as styrene-butadiene rubber, silicon rubber, urethane rubber, or fluorine rubber is used. In addition, a suitable means for fixing the elastic sheet 2 to the inner wall of the rotary container 1, in particular, to the top of the lifter bar 3 as in this embodiment, such as an adhesive or an adhesive tape. -It is good to use a rope or a string.

Then, as shown in FIG. 2, when the powder A to be mixed is put into the rotary container 1 together with the ball 5 and the rotary container 1 is rotated, the lower half of the rotary container 1 is almost halved. Is subjected to the load of the ball and the powder A to be mixed, and the elastic sheet 2 at that portion is elastically deformed to approach the inner wall of the rotary container 1 so as to fill the gap 4 or come into contact therewith. To do. However, when the position moves to the position of the upper half by the rotation of the rotary container 1, the ball 5 and the powder A to be mixed roll and fall in the elastic sheet 2. In the upper half, the elastic sheet 2 is repulsed by its elastic restoring force while returning the void 4 to the original shape, and this operation prevents the powder A to be mixed from adhering.

In this way, since the elastic sheet 2 repeatedly expands and contracts as the rotary container 1 rotates, the powder to be mixed A does not adhere to the surface thereof, and the powder to be mixed is not attached. A can be homogenized into a fine powder, or
It can be sufficiently mixed and dispersed.

The elastic sheet 2 is composed of the powder A to be mixed.
It is preferable that the thickness is sufficient to withstand the weight of the ball, the ball, and the impact, and usually about 1 to 10 mm is suitable. Further, in practice, the gap 4 is preferably determined in consideration of the elongation rate of the elastic sheet, and normally, about 0.5 to 10 cm is suitable.

[0014]

The present invention has been described in detail above. The powder to be mixed is put into the rotary container, and the powder to be mixed is tumbled and crushed in the process of rotating the rotary container. Alternatively, in the case of mixing and dispersing, an elastic sheet is provided in the rotary container through a gap having a required width with respect to the inner peripheral wall of the rotary container, and the powder to be mixed is transferred in the elastic sheet. In the process of rotating the rotary container, the position of the elastic sheet supporting the powder to be mixed moves, and the elastic sheet moves toward the void at the position where the load is applied. Due to the elastic deformation, the adherence of the powder to be mixed to the surface of the elastic sheet can be prevented. Therefore, the powder to be mixed can be uniformly pulverized into a fine powder state, or can be sufficiently mixed and dispersed.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view for explaining an embodiment of the present invention.

FIG. 2 is likewise a schematic vertical sectional view for explaining the operation.

FIG. 3 is a schematic vertical sectional view of a conventional example.

[Explanation of Codes] 1 rotating container 2 elastic sheet 3 lifter bar 4 void 5 ball A powder to be mixed

Claims (1)

(57) [Scope of utility model registration request] 1. A dry powder mixture in which a powder to be mixed is put into a rotary container, and the powder to be mixed is tumbled and pulverized or mixed and dispersed in the process of rotating the rotary container. In the machine, an elastic sheet is arranged in the rotary container through a gap having a required width with respect to the inner peripheral wall of the rotary container, and the powder to be mixed is rolled in the elastic sheet to form the elastic sheet. When the load of the powder to be mixed is applied to the elastic sheet, the elastic sheet at that position is elastically deformed toward the void and fills the void, and when the load of the powder to be mixed is released, A dry powder mixing machine characterized in that the powder returns to its original state by a restoring force, and the repulsion of this operation can prevent the powder to be mixed from adhering to the elastic sheet.