JPH0716443A - Method for mixing and impregnating liquid into particulate - Google Patents

Abstract

PURPOSE:To improve the strength of a product, to prevent the generation of bubble and to improve appearance by previously deaerating before mixing and impregnating a liquid in to particulates under reduced pressure. CONSTITUTION:The proper amount of particulates 1 being granular solid matter are contained in the molding flask 4 setted on a base 3, then a vacuum vessel 5 is covered, and the air in the vacuum vessel 5 is removed by a vacuum pump 6 to vacuumize the inside of the vacuum vessel 5, and the air in the granular solid matter 1 is deaerated. Then, the proper amount of the liquid 2 deaerated previously by a dearating vessel 7 is supplied into the deaerated particulates 1 in this state, and an agitating blade 10 is lowered to agitate the prticulates 1 and the liquid 2. Thereafter, the flask 4 is left standing, and the molded product in which the liquid 2 is mixed and impegnated into the particulates 1 is obtained and taken out of the molding flask 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mixing and impregnating powder and granules with a liquid, and more specifically, various materials (ceramic powder, cement) used in the material industry such as metal forming industry, mining industry, and ceramic industry. TECHNICAL FIELD The present invention relates to a method for mixing and impregnating powders, metal powders, plastic powders or granular organic / inorganic solids) with liquids such as water (reactant, binder, impregnating agent).

[0002]

As is well known, the field of metal forming, the field of mining,
Various materials (ceramic powder, ceramic powder,
Cement powder, metal powder, plastic powder or granular particles of organic or inorganic solids etc. to liquid such as water (reactant,
Binder, impregnating agent) are mixed and impregnated. In that case, air in the powder and granules is removed under a reduced pressure environment,
A technique is known in which a liquid is introduced in this state and the powder and granules are mixed and impregnated with the liquid. And this is because when the product made by mixing and impregnating a powder with a liquid has holes in the product due to air bubbles, the strength decreases, and when the cut surface is ground and used as an exterior. This is carried out in order to prevent such a problem that holes appear on the surface and the appearance is unfavorable.

[0003]

According to the above-mentioned conventional technique, the air in the granular material is removed under a reduced pressure environment, and the liquid is introduced and mixed and impregnated in that state, so that the generation of bubbles is prevented to some extent. However, as a result of the applicant's detailed examination of the cut surface, it was found that fine bubbles were still generated. And as the cause, since the work of mixing and impregnating the liquid into the granular material is performed in a reduced pressure environment, the gas component contained in the liquid becomes supersaturated by the heat at the time of the reaction due to the mixed impregnation, and as a result, the supersaturated component It is conceivable that the gas component of will appear as fine bubbles.

[0004]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve the problems of the prior art as described above.
It is possible to prevent the generation of fine bubbles that occur when liquid is mixed and impregnated into powders and granules from which air has been removed under a reduced pressure environment, so that the product made of the product formed by mixing and impregnating powder and granules with liquid It is an object of the present invention to provide a method for mixing and impregnating a granular material with a liquid, which can improve the strength and can prevent the appearance of holes due to air bubbles on the cut surface and can further improve the appearance.

[0005]

In order to achieve the above object, the present invention has the following technical means. That is, to explain using the reference numerals used in the examples, the air in the granular material 1 is removed under a reduced pressure environment, and the liquid 2 to be mixed and impregnated in that state is mixed between the granular material 1 itself or the granular particles 1. In the method of mixing and impregnating into the gap, the liquid 2 is powdered or granular material 1 under reduced pressure environment.
It is a method for mixing and impregnating liquid into a powder or granular material, which is characterized in that it is degassed in advance before being mixed and impregnated into

[0006]

The present invention comprises the above technical means, and since the liquid 2 to be mixed and impregnated with the powdery or granular material 1 from which air has been removed under a reduced pressure environment has been deaerated beforehand, the liquid 2 is powdered or granular material under a reduced pressure environment. 1 is mixed and impregnated, even if heat is generated by the reaction, a supersaturated state does not occur in the liquid 2, and therefore, generation of fine bubbles can be prevented, and the granular material 1 is formed by mixing and impregnating the liquid 2. It is possible to improve the strength and the appearance of the cut surface of the product made of the resulting product.

[0007]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The method for mixing and impregnating liquid into a granular material of the present invention is to remove air in a granular material 1 of ceramic powder, cement powder, metal powder, plastic powder or granular organic / inorganic solid material under a reduced pressure environment. In mixing and impregnating the liquid (reactant, binder, impregnating agent) 2 such as water to be mixed and impregnated in that state into the granular material 1 itself or the gap between the granular materials 1, the liquid 2 is mixed. It is deaerated in advance before mixing and impregnating the powdery or granular material 1 under a reduced pressure environment.

FIG. 1 specifically shows the above method, in which an appropriate amount of powdery or granular material (mixed cement or the like) 1 is housed in a mold 4 set on a base 3, and then a vacuum container 5 is placed. Then, the air in the vacuum container 5 is removed by the vacuum pump 6 to form a reduced pressure environment in the vacuum container 5, and the air is removed from the powdery or granular material 1 contained in the mold 4.
Then, in that state, an appropriate amount of liquid (water or the like) 2 that has been degassed in advance by the degassing device 7 is charged into the air-removed powder and granules 1, and the stirring blade 10 arranged above the mold 4 is lowered. D
Then, it is rotated R to stir the granular material 1 and the liquid 2 housed in the mold 4, and then allowed to stand to form a molded product in which the granular material 1 is mixed and impregnated with the liquid 2. The formed product is taken out from the vacuum container 5 and the mold 4 and sent to the next step.

The deaerator 7 for deaerating the liquid 2 comprises a deaerator body 8 and a vacuum pump 9.
By depressurizing the inside of the deaerator body 8 by the vacuum pump 9, the liquid 2 passing through the deaerator body 8 is deaerated.

When the powder 2 is mixed and impregnated with the liquid 2, the air in the powder 1 is removed under a reduced pressure environment and at the same time the liquid 2 is degassed. Even if heat is generated due to the reaction during mixed impregnation, supersaturation does not occur, so that fine bubbles do not occur, and thus the strength of the resultant product obtained by mixing and impregnating the granular material 1 with the liquid 2 is improved. In addition to keeping the same, holes do not appear in the cut surface, so that the polished cut surface has a good appearance.
Further, as the equipment for mixing and impregnating the liquid 2 into the powdery or granular material 1, since it is sufficient to incorporate the degassing device 7 for the liquid 2 into the conventional equipment, a better product can be manufactured at low cost.

[0011]

As described above in detail, the present invention has the following effects. That is, according to claim 1, since the liquid to be mixed and impregnated into the powder or granules from which air has been removed under the reduced pressure environment has been deaerated beforehand, when the liquid is mixed and impregnated into the powder or granular material under the reduced pressure environment, Even if heat is generated by the reaction, supersaturation does not occur in the liquid and thus the generation of fine bubbles can be prevented, and the strength of the product made of the product formed by mixing and impregnating the powder with the liquid and the strength of the cut surface It is possible to provide a method for mixing and impregnating a powder or liquid with a liquid that can improve the appearance.

According to the second aspect of the present invention, it is possible to provide a method for mixing and impregnating a liquid with a powder, which has the advantages of the first aspect and can be easily generated from the conventional mixing and impregnating method. Is.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a method of mixing and impregnating a granular material with a liquid.

[Explanation of symbols]

 1 powder and granules 2 liquid 3 base 4 formwork 5 vacuum container 6 vacuum pump 7 deaerator

Claims (2)

[Claims] 1. A method of removing air in a granular material 1 in a reduced pressure environment and mixing and impregnating the liquid 2 to be mixed and impregnated in the state into the granular material 1 itself or a gap between the granular materials 1. In the method for mixing and impregnating liquid into a granular material, the liquid 2 is deaerated before being mixed and impregnated into the granular material 1 under a reduced pressure environment. 2. The powdery or granular material 1 whose amount is adjusted in advance is set in a mold 4, and the powdery or granular material 1 set in the mold 4 is housed together with the mold 4 in a vacuum container 5. Then, the air in the powder and granules 1 set in the mold is removed by depressurizing the inside of the vacuum container with the vacuum pump 6, and the powder and granules 1 itself set in the mold 4 in this state. Or powder 1
In a method of introducing and impregnating liquid 2 into a gap between them; introducing the liquid 2 in a degassed state in advance, and thereafter introducing into powder 1 itself or a gap between particles 1 The liquid 2 is mixed and impregnated and molded, and then the molded product of the granular material 1 set in the mold 4 from the vacuum container 5 and mixed and impregnated with the liquid 2 is taken out, and thereafter, necessary steps such as sintering are performed. A method for mixing and impregnating liquid into a powder or granular material, characterized by forming a molded product in which the liquid 2 is mixed and impregnated into the powder or granular material 1.