JPH06182744A - Manufacture of inorganic cement plate - Google Patents

Abstract

PURPOSE:To present expression rich in material appearance and stabilise a quality, by a method wherein a specific surface molding material is spread on a specific base mat, uneven pattern is formed on the surface ' by pressure molding and the same is cured and solidified by washing away cement on the surface by a spray. CONSTITUTION:Slurry which consists mainly of hydraulic cement and water and is obtained by adding aggregate or a fiber when need arises is scooped by paper making method, through which a base at 1 is formed and conveyed continuously by a mat conveyor. On one hand, the hydraulic cement having a water content of at most 50% and the aggregate 2 such as macadam or silica sand are kneaded by a batch type mixer, a surface molding material 3 is formed, spread over the base mat 1 and press-molded by a pressing device. Water is sprayed through a spray after that, the cement 4 with which the surface of the aggregate is coated is washed away, the surface of the aggregate 2 is exposed and then cured and solidified and an inorganic cement plate having unevenness on the surface is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing a multi-layered inorganic cement board having a multi-layered surface by laminating a surface molding material containing a granular aggregate on a base mat formed by papermaking. It is about.

[0002]

2. Description of the Related Art Conventionally, when manufacturing this type of inorganic cement board, a base material mat formed by papermaking
A surface molding material mainly composed of hydraulic cement and aggregate was sprayed and pressure-molded to form an uneven pattern on the surface.

[0003]

In the above-mentioned inorganic cement board, an uneven pattern is formed on the surface by the aggregate, but the surface of the aggregate is in a state of being covered with cement, and the surface of the aggregate is directly It was not exposed, the texture of the aggregate did not appear, and the appearance was poor. The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for producing an inorganic cement board capable of giving a material appearance of an aggregate on the surface and providing a rich appearance. .

[0004]

In order to achieve the above object, a method for producing an inorganic cement board according to the present invention comprises a base material mat 1 obtained by papermaking a hydraulic cement and a slurry containing water as a main component.
And a surface molding material 3 mainly composed of a hydraulic cement and an aggregate 2 having a water content not exceeding 50% on a base material mat 1 having a relatively high water content between the steps immediately after papermaking and before pressing.
To form an uneven pattern on the surface by pressure molding, and then spray water on the surface to wash the cement 4 adhering to the surface of the aggregate 2 until loading.
After that, it is characterized by curing and hardening.

[0005]

According to the above structure, the surface of the aggregate 3 can be directly exposed by washing away the cement 4 adhering to the surface of the aggregate 3 in the soft time immediately after pressing, and the appearance with a rich texture can be obtained. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 shows the whole manufacturing apparatus. 5
Is a mat transporting conveyor for continuously transporting the base mat 1 formed by the papermaking method. 6
Is a batch-type mixer, with hydraulic cement and aggregate 2
Are mixed to form the surface molding material 3. 7
Is a hopper for supplying the surface molding material 3, into which the surface molding material 3 kneaded by the batch type mixer 6 is charged. Surface molding material 3 supplied from hopper 7
Is measured by a belt scale 8 and conveyed, and this is conveyed to an electromagnetic feeder 10 by a material conveyer 9. In the electromagnetic feeder 10, the surface molding material 3 is sprinkled on the base mat 1. A press device 11 is arranged in front of the electromagnetic feeder 10 and above the mat conveying conveyor 5, and a spray device 12 is arranged in front of the press device 11.

Next, a method for manufacturing an inorganic cement board using the manufacturing apparatus configured as described above will be described. A base mat 1 is formed by making a slurry containing hydraulic cement and water as main components and optionally aggregates and fibers by a paper making method, and the base mat 1 is a conveyor 5 for mat transport. Are continuously transported in. On the other hand, a hydraulic cement whose water content does not exceed 50% and an aggregate 2 such as crushed stone or silica sand are kneaded by a batch type mixer 6 to obtain a surface molding material 3
Are formed, and the surface molding material 3 is supplied to the hopper 7. The surface molding material 3 is supplied from the hopper 7 to the electromagnetic feeder 10 via the belt scale 8 and the material conveying conveyor 9, and the surface molding material 3 is scattered from the electromagnetic feeder 10 on the base mat 1. At this time, surface molding material 3
Is sprayed so as to have a thickness of about 2 to 4 mm and pressure-molded by the press device 11. After press-molding with the press device 11, water is sprayed from the spray device 11 to wash away the cement 4 covering the surface of the aggregate 2, and the surface of the aggregate 2 is exposed. As a result, as shown in FIG.
The surface of the aggregate 2 is exposed from (a) to FIG. 1 (b) and FIG. 2 (b).

The pressure applied from the spray device 11 is preferably about 0.5 to 3.0 kg / cm ² . Aggregate 2
If you want to expose a lot of water, make the water pressure as high as possible within this range. However, if it is 3.0 kg / cm ² or more, aggregate 2
May fly. Table 1 shows the relationship between the flow rate and the pressure.

[0009]

[Table 1]

Next, the present invention will be described by way of specific examples. (Specific example) The weight ratio of cement and aggregate is 1: 2.
And kneaded to form a surface molding material. And extract in the usual way
After pressing the above surface molding material on the formed base mat
Spray to a thickness of 2 mm, then press pressure 3
0 kg / cm²After pressing for 2 seconds at 85m / min
Water pressure of 1kg / cm ²,
It was sprayed at a flow rate of 2.5 l / min. By this
A multi-layer molded plate with exposed aggregate was obtained.

[0011]

According to the present invention, after pressing as described above, water is sprayed on the surface in a soft state to wash away the cement adhering to the surface of the aggregate, so that the surface of the aggregate is exposed and the texture (Material feeling) can be expressed in abundance, and since it is sprayed in an uncured and soft state, it can be processed with low water pressure, and the washed-out cement flows into the gap between aggregates. Therefore, the quality is stable and the quality is stable.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a manufacturing method of the present invention,
(A) is a state before washing away the cement on the surface of the aggregate,
(B) shows a state where the cement is washed away to expose the aggregate.

2 (a) and 2 (b) are sectional views for enlarging a main part of FIG.

FIG. 3 is a perspective view of the manufacturing facility of the above.

[Explanation of symbols]

 1 Base Mat 2 Aggregate 3 Surface Molding Material 4 Cement

Claims (1)

[Claims] 1. A water-based cement is formed on a base material mat having a relatively high water content between a step immediately after the paper making and a step before pressing by forming a slurry containing water-based cement and water as a main component. Of water-based cement whose main component is less than 50% is dispersed, and the surface molding material mainly composed of aggregate is sprayed to form an uneven pattern on the surface by pressure molding. A method for producing an inorganic cement board, which comprises spraying the surface to wash away the cement adhering to the surface of the aggregate, and then curing and hardening the cement.