JPH1177629A - Manufacture of inorganic hardened body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quicken demolding by decreasing the amount of water mixed with an inorganic material and facilitate a molding even in an intricate shape by a method wherein an inorganic material slurry mainly made of cement is dropped to fly and adhered onto the inner surface of a form by being fallen onto a rotating disc, which moves vertically in a tubular form in the stabe being rotated. SOLUTION: A rotating disc 2, which moves vertically in a tubular form 1, is rotated so as to drop an inorganic material slurry mainly made of cement on the rotating disc 2 in order to fly the slurry to the inner surface of the form for filling. Just after the filling of the slurry, a formed body is stripped from the form 1. After that, by curing the formed body stripped from the form 1 after the stripping in a wet chamber, an inorganic hardened body is obtained. Since enough energy is given to the slurry by flying in high speed against the inner surface of the form 1, the fully filling to the inner surface of the form 1 is resulted even under the state that the moisture content in the slurry is small. Thus, since the sure filling of the slurry to the inner surface of the form 1 is realized, the immediate stripping of the inorganic hardened body from the form 1 after the completion of the filling becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing an inorganic cured product, and more particularly to a method for producing an inorganic cured product useful as a member for a roof or an outer wall.

[0002]

2. Description of the Related Art Conventionally, in order to produce an inorganic cured product having a three-dimensional shape, it is common to supply a slurry of an inorganic material mainly composed of cement into a mold, fill and cure the slurry. In recent years, a method of supplying a slurry of an inorganic material containing cement as a main raw material into a mold and filling the same, followed by pressing and dewatering has also been performed.

[0003] However, in the above-mentioned production method, it is necessary to impart fluidity to the material in order to fill the inorganic material into the mold, and excessive water is blended.
To remove the material from the formwork, the material must be cured,
For this reason, there was a problem that the rotation rate of the mold was poor and productivity was poor.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and can reduce the amount of water added to the inorganic material to accelerate the demolding. It is an object of the present invention to provide a method for producing an inorganic cured product which can be easily produced even in a complicated shape and which can form an inorganic cured product having a beautiful appearance by a simple method.

[0005]

In order to solve the above-mentioned problems, a method of manufacturing an inorganic cured product according to the present invention comprises rotating a rotating disk 2 which moves up and down in a cylindrical mold 1, and rotating the rotating disk 2. The method is characterized in that a slurry 3 of an inorganic material containing cement as a main raw material is dropped onto the mold 2 and is dropped on the inner surface of the mold 1 to adhere to the mold 1 for forming. By adopting such a method, even if the amount of water contained in the slurry 3 is reduced, the slurry 3 can be surely blown to and adhered to the inner surface of the mold 1 to form a desired inorganic cured product.

It is preferable that the forming thickness is changed by changing the speed at which the rotary disk 2 is moved up and down. With such a method, by changing the vertical speed of the rotating disk 2, the amount of slurry 3 that is blown off and adhered to the inner surface of the mold 1 by the rotating disk 2 is changed in the vertical direction of the mold 1. As a result, the molded thickness of the inorganic cured product to be molded can be easily changed.

It is preferable that two or more colored slurries 3 having different colors are dropped to form an inorganic cured product having a random color. With such a configuration, an appearance in which a plurality of colors are mixed in the inorganic cured body to be molded can be obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings. 1 (a) and 1 (b) are schematic explanatory views of an apparatus used for the method for producing an inorganic cured product according to the present invention. The mold 1 has a cylindrical shape, and a plurality of arc-shaped mold portions 4 are framed in a cylindrical shape. A rotating disk 2 is arranged in the cylindrical mold 1. Rotating disk 2
The shaft 5 is fixed to the center of. The shaft 5 is parallel to the cylindrical mold 1 and is concentric with the mold 1. Shaft 5
Although not shown, the shaft 5 can be moved up and down by a vertical moving mechanism, and the shaft 5 is rotated by a rotating mechanism (not shown). Here, as the vertical moving mechanism for vertically moving the shaft 5 and the rotating mechanism for rotating the shaft 5, any conventionally known vertical moving mechanism and rotating mechanism can be adopted. By rotating the shaft 5 up and down, the rotating disk 2 moves up and down in the mold 1 while rotating.

In the present invention, the rotating disk 2 which moves up and down in the cylindrical mold 1 is rotated.
The slurry 3 of the inorganic material containing cement as a main raw material is dropped into the mold 1 and is blown onto the inner surface of the mold 1 to be filled. The molded body is released from the mold 1 immediately after filling. Then, the molded product removed from the mold 1 is cured in a wet chamber after the removal of the molded product, thereby obtaining an intended inorganic cured product.

Here, in the present invention, the slurry 3 of the inorganic material containing cement as a main raw material is dropped on the rotating disc 2 and is dropped on the inner surface of the mold 1 by the rotating disc 2. As a result, sufficient energy is given to the inner surface of the mold 1, and as a result, the inner surface of the mold 1 is sufficiently filled even if the amount of water in the slurry is small.
As described above, even if the amount of moisture is small, the inner surface of the mold 1 is reliably filled, so that the mold can be immediately removed from the mold 1 when the filling is completed.

The size of the mold 1 and the size of the rotating disk 2
As an example of the rotation speed, in FIG. 1, the inner diameter of the mold 1 is 200 mm, the diameter of the rotating disk 2 is 100 mm, and the rotation speed is about 500 to 2000 RPM. Here, if the rotation of the rotating disk 2 is too low, the speed at which the material flies to the inner surface of the mold 1 is not sufficient. Since the filling is not successful, the rotation speed is 500 to 2000RP as described above.
It is about M.

As described above, the mold 1 is formed by forming a plurality of arc-shaped mold portions 4 into a cylindrical frame. However, as shown in FIGS. Partitioning piece 4a
By filling the slurry 3 thinner than the projecting length of the partitioning protruding piece 4a, when the mold is released after filling, an arc-shaped curved surface having a size corresponding to the arc-shaped frame portion 4 as shown in FIG. The molded article 20 can be formed.
Of course, when the partitioning projection 4a is not provided on the arc-shaped frame portion 4, the cylindrical molded body 20 can be formed.

When the rotating disk 2 is moved up and down, a slurry 3 of an inorganic material containing cement as a main raw material is dropped on the rotating disk 2 quantitatively. , A molded body having a uniform thickness can be formed. On the other hand, when the rotating disk 2 is moved up and down, when the slurry 3 of the inorganic material containing cement as a main raw material is dropped on the rotating disk 2 quantitatively, the vertical moving speed of the rotating disk 2 is changed. In this case, the amount of the slurry 3 that is blown off and adhered to the inner surface of the mold 1 by the rotating disc 2 is reduced.
Can be changed in the vertical direction, and as a result, the molding thickness of the molded body to be molded can be easily changed.

Further, two or more colored slurries 3 of different colors are prepared as the slurry 3 of the inorganic material mainly composed of cement, and the two or more colored slurries 3 of different colors are placed on the rotating disk 2. To fill the inner surface of the mold 1 to obtain a molded body having a random color. When two or more colored slurries 3 of different colors are dropped onto the rotating disk 2, the slurry 3 is granulated to a diameter of several millimeters by separate pan mills, and the granules of the plurality of colors are appropriately mixed. Although the slurry is dropped on the rotating disk 2, the slurry of a plurality of colors may be dropped directly on the rotating disk 2 without granulation.

Next, a specific embodiment of the present invention will be described.

[0016]

【Example】

(Example 1) A slurry prepared by mixing 100 parts by weight of Portland cement, 50 parts by weight of fly ash, 3 parts by weight of vinylon (fiber length 6 mm), and 25 parts by weight of water was vertically moved into a mold 1 having an inner diameter of 200 mm. 10 freely arranged
The molded product having a curved surface with a thickness of 7 mm was formed by dropping it quantitatively on the rotating disk 2 having a diameter of 100 mm rotating at 00 RPM while moving the rotating disk 2 up and down.

The molded body thus obtained could be immediately removed from the mold 1. After the mold was released, it was cured in a humidity chamber at 60 ° C. for 5 hours, and then cured and cured in a humidity chamber for 24 hours to obtain an inorganic cured product. (Comparative Example 1) When a slurry having the same composition as in Example 1 was poured into a mold having a curved surface and filled, the slurry was low in water content and was sufficiently filled, so that it could be sufficiently filled. Did not. To pour into a mold having a curved surface and fill it somehow, add 2
It was necessary to increase from 0 parts by weight to 65 parts by weight or more. When the water is increased to 65 parts by weight, a curing and curing time of about 5 hours is required at 60 ° C. in a state of being filled in a mold. Shape could not be preserved.

(Example 2) The molding was carried out basically in the same manner as in Example 1. In this embodiment, when the rotating disk 2 is moved up and down, instead of moving up and down at a constant speed, the speed is changed as shown in FIG. 4 to obtain a molded body having a changed thickness as shown in FIG. Was. In FIG. 4, the vertical axis indicates the vertical position of the mold 1, and the horizontal axis indicates the vertical moving speed of the rotating disk 2.

The molded body thus obtained could be immediately removed from the mold 1. After the mold was released, it was cured in a humidity chamber at 60 ° C. for 5 hours, and then cured and cured in a humidity chamber for 24 hours to obtain an inorganic cured product. (Example 3) 100 parts by weight of white Portland cement,
50 parts by weight of fly ash, vinylon (fiber length 6 mm)
A slurry prepared by mixing 3 parts by weight and 25 parts by weight of water was used as a white material.
0 parts by weight, fly ash 50 parts by weight, vinylon (fiber length 6 mm) 3 parts by weight, carbon black 0.3 parts by weight,
A slurry mixed with 25 parts by weight of water was used as a black material, and a white material and a black material were separately granulated to a diameter of about 5 mm using a pan mill, and a granulated white material thus granulated, The granulated material of black material is quantitatively dropped on a rotating disk 2 having a diameter of 100 mm and rotating at 1000 RPM, which is vertically movable in a mold 1 having an inner diameter of 200 mm, and the rotating disk 2 is moved up and down. A molded article having a curved surface having a thickness of 7 mm was formed while the molding was being performed.

The molded body thus obtained could be immediately removed from the mold 1. After removal from the mold, curing was performed in a humidity chamber at 60 ° C. for 5 hours, and then curing and curing was performed in a humidity chamber for 24 hours to obtain an inorganic cured product having a beautiful appearance in which white and black were mixed delicately.

[0021]

According to the invention of claim 1 of the present invention, as described above, a rotating disk that moves up and down in a cylindrical mold is rotated, and cement is used as a raw material for the rotating disk. Since the slurry of the inorganic material to be dropped is formed by dropping and flying and adhering to the inner surface of the formwork, the slurry dropped on the rotating disk flies at a high speed to the inner surface of the formwork and sufficient energy is given, so it is included in the slurry. Even if you reduce the amount of water
The slurry can be reliably filled in the inner surface of the mold, and as a result, even if the mold is removed immediately after filling, the molded product is not collapsed, the rotational efficiency of the mold is improved, and the productivity is improved.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the molding thickness is changed by changing the speed at which the rotary disk is moved up and down. Even a complicated shape having a different thickness can be formed by a simple method of changing the vertical moving speed of the rotating disk. According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, an inorganic material having a random color by dropping two or more types of colored slurries having different colors. Since the cured product is molded, an inorganic cured product having a beautiful appearance in which a plurality of colors are mixed can be obtained.

[Brief description of the drawings]

FIG. 1 shows an apparatus used for a method for producing an inorganic cured product of the present invention, in which (a) is a front sectional view and (b) is a plan view.

FIG. 2 is a cross-sectional view of the same molding state.

FIG. 3 is a cross-sectional view of the inorganic cured product obtained as described above.

FIG. 4 is a graph showing the relationship between the vertical position of the mold and the vertical moving speed of the rotating disk in an example in which the vertical moving speed of the rotating disk is changed.

FIG. 5 is a cross-sectional view of a molded article obtained as described above.

[Explanation of symbols]

 1 Formwork 2 Rotating disk 3 Slurry

Claims (3)

[Claims] 1. A rotating disk which moves up and down in a cylindrical mold is rotated, and a slurry of an inorganic material containing cement as a main raw material is dropped on the rotating disk to fly and adhere to the inner surface of the mold. A method for producing an inorganic cured product, which comprises molding. 2. The method for producing an inorganic cured product according to claim 1, wherein the molding thickness is changed by changing the speed at which the rotating disk is moved up and down. 3. The method for producing an inorganic cured product according to claim 1, wherein two or more colored slurries having different colors are dropped to form an inorganic cured product having a random color. .