JPH03146124A - Mixing powder particles - Google Patents

Abstract

PURPOSE:To uniformly mix major components of powder particles with minor components by supplying the major components continuously first and sending the minor components a little later and mixing and stirring the minor components with the major immediately. CONSTITUTION:Major components of powder particles and minor components of powder particles like the major components are supplied to a mixing tank 11 and stirred to mix them. In this case, firstly the major components are supplied to the mixing tank 11 continuously and the minor components are supplied a little later to the mixing tank 11 and stirred and mixed with the major components immediately. As a result, the major components and the minor components comprises of powder particles are mixed uniformly and mixing period for each batch can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for uniformly mixing two or more types of powder or granules having widely different mixing ratios.

[Prior Art] Conventionally, in order to measure and mix powder and granular materials with a small amount of components such as the main material of rubber or plastic and its coloring divided by 4, a third method has been used.
As shown in the flowchart in the figure, the main material, which is a major component, and the minor component are started to be measured at the same time, and the weighed portions are fed into a mixing tank in order, where they are mixed using stirring blades. ing.

[Problems to be Solved by the Invention] However, in such a conventional method, as shown in FIG. Such a small amount of component 4 enters this clearance area 3 and stays there.

Therefore, there was a problem of uneven mixing.

Note that the reference numeral 5 in the figure indicates the main material.

Recently, in order to precisely measure and mix a large amount component and a small amount component made of powder or granules, first accurately weigh the small amount component, and then use the product of this weight multiplied by a predetermined ratio as a target value to measure and mix the large amount component. A method of weighing and mixing has also been disclosed (Japanese Patent Application Laid-Open No. 145320/1983), but this method also has the problem of uneven mixing, similar to the conventional method.

The present invention was made in order to solve these problems, and it is a powder that can uniformly and uniformly mix a large amount of powder and a small amount of components, and shorten the mixing time for each batch. [1] It is an object of the present invention to provide a method for mixing granules.

[Means for Solving the Problems] The method for mixing powder and granules of the present invention includes supplying a large amount of the component made of the powder and a small amount of the component that is also made of the granules to a mixing tank,
In the method of mixing by stirring, first, the large amount component is continuously supplied to the mixing tank, and the small amount component is sent into the mixing tank later than the large amount component, where it is immediately mixed with the large amount component. It is characterized by stirring and mixing.

[Function] In the method of measuring and mixing powder and granular materials of the present invention, first, the major components are continuously supplied to the mixing tank. Then, the supply of the minor component is started after an appropriate time delay from the start of the supply of the major component.

In other words, when the previously supplied large quantity component is stored in an amount sufficient to fill the clearance at the bottom of the mixing tank,
The feed of the minor component is started and is now stirred together with the major component.

Therefore, the small amount component does not stay in the clearance of the mixing tank, and the large amount component and the small amount component are mixed uniformly.

In addition, there is a possibility that the previously supplied large amount components may remain slightly in the clearance, but even in this case, the proportion of the remaining bone in the total large amount components is extremely small, so the mixing may be uneven compared to when small amounts of components remain. Hard to occur.

Further, according to the method of the present invention, uniform mixing is possible in a short time, so the time required for mixing each batch can be significantly shortened.

[Example J Examples of the present invention will be described below.

In the example, when mixing powder coloring material with the main material of rubber or plastic powder, as shown in the flowchart in Figure 1, first the main material, which is a major component, is measured, and then the weighed The materials are sequentially fed into a mixing tank equipped with stirring blades.

On the other hand, the measurement of the coloring material, which is a small amount component, is started after an appropriate time delay from the time when the measurement of the large amount component is started, and the coloring material, which is a small amount component, is started an appropriate amount of time after the start of measurement of the large amount component described above. Send it to the tank. In this mixing tank, the two components, which are being continuously supplied, are mixed by a stirring blade.

An example of an apparatus for measuring and mixing such powder and granular materials is shown in FIG.

In the figure, reference numeral 6 indicates a hopper for storing the main material, and reference numeral 7 indicates a hopper for coloring material, and the powder and granular materials 8 stored in these hoppers are conveyed by screw feeders 9, respectively. Also, at the bottom of this screw feeder 9, the powder and granular material 8 to be conveyed is placed! A mixing tank 11 equipped with stirring blades 10 is connected via a measuring mechanism (not shown) for measuring If W.

In the method of the embodiment using such a device, only the main material, which is a major component, is metered and supplied during the delayed time, and this is accumulated in an amount sufficient to fill the clearance in the mixing tank 11. Only then can the colorant, which is a small component, be measured and supplied.
The main material and the coloring material are uniformly mixed without stagnation in one clearance.

Furthermore, since the mixture can be uniformly mixed in a short time, the time required for mixing each batch can be significantly shortened.

[Effects of the Invention] As explained above, according to the method for mixing powder and granular material of the present invention, large amounts of components of powder and granules as well as small amounts of components of powder and granules can be mixed evenly and uniformly, and characteristics can be improved. A good powder raw material can be obtained.

Moreover, the time required for mixing can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a flowchart for explaining the present invention in detail, FIG. 2 is a partially cutaway front view of the apparatus used in the examples, and FIG. FIG. 4 is an explanatory cross-sectional view of the mixing tank at the start of mixing to explain the problems in the conventional method. 1 6... Main H's hopper 7... Blue Shrine's hopper 8...
... Powder O ... Stirring blade 1 ...... Mixing tank output KfI Sekisui Chemical Co., Ltd. Figure 2 Figure 11 Figure 3 4

Claims (1)

[Claims] (1) In a method in which a large amount component consisting of powder and granules and a small amount component also consisting of powder and granules are mixed by supplying the same to a mixing tank and stirring, first, the large amount component is continuously supplied to the mixing tank, and . A method for mixing powder and granular material, characterized in that the small amount component is fed into the mixing tank later than the large amount component, and is immediately stirred and mixed with the large amount component therein.