JPH03213305A - Manufacturing method of inorganic wallboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an inorganic wallboard, and more particularly to a method for manufacturing an inorganic wallboard using a papermaking method.

[Conventional technology]

Conventionally, as a manufacturing method for ceramic-based inorganic wallboards using cement as the main raw material, hydraulic raw materials such as cement were dispersed in a large amount of water, and this was then milled using a round mill cylinder, and the resulting seed film was then felt-held. There is a well-known paper-making method in which the seed film is continuously wound onto a large-diameter making roll, laminated to a predetermined thickness, cut, and then flattened to form a plate.

By the way, the above-mentioned papermaking method generally produces thick plates by laminating many layers of thin seed films, so even if the finished product is pressed after being cut from the making roll, delamination may occur in the finished product. There was a fateful problem that made it easier.

To solve this problem, for example, Japanese Patent Application Laid-open No. 5
As disclosed in Japanese Patent No. 2-78916, when laminating a seed film onto a making roll, glass fibers or the like are dispersed and interposed between the layers to increase the adhesion strength between the eyebrows.

[Problems with conventional technology]

However, it is very difficult to control the dispersion of additives when dispersing and intervening the above-mentioned fibers between the layers of the seed film. This has the drawback that it creates unevenness on the skin, which can cause air to be trapped between the eyebrows, which can have the opposite effect.

[Problem to be solved by the invention]

In view of the above-mentioned drawbacks, the present invention was made for the purpose of providing a method for manufacturing inorganic wallboards that can reliably prevent peeling between laminated seed layers in a papermaking method and that is extremely easy to control. It is.

[Technology that led to solving the problem]

That is, in the method for producing an inorganic wallboard of the present invention, in the case of producing an inorganic wallboard by a paper-making method, when the seed layer is laminated on the making roll to a predetermined height, the seed layer on the making roll is It is characterized by being wound up while pressing a textured roll onto the surface.

[Effect]

In this invention, the papermaking method itself is exactly the same as the conventionally known method.

In this papermaking method, when the seed layer is wound around a making roll and laminated to a predetermined thickness, in the final step of laminating the seed layer to a predetermined thickness on the surface of the making roll, the surface is rolled with an uneven surface. It is rolled up while being pressed.

Therefore, since the seed layer is wound onto the making roll while being given unevenness according to the unevenness roll, the unevenness becomes wedged between each layer, and the interlayer adhesion strength is significantly increased.

In addition, there is no inclusion between the eyebrows, and the roll is simply applied from the outside, making it easy to manage.

〔Example〕

Next, this invention will be explained in detail.

FIG. 1 is a side view of an apparatus for carrying out the method of this invention;
The figure shows an enlarged side view of the main parts of the implementation device.

Example 1 A cement aqueous solution 2 was prepared by uniformly dispersing cement, mineral raw materials, aggregates, and reinforcing fibers in water according to a conventional method using an apparatus 1 used in a conventional papermaking method. Filled with water, and made into a paper with a round mesh cylinder 4 to a thickness of 1fi.
The inorganic seed film 5 was transposed into a felt heald 6, which was then wound and laminated around a making roll 7 in contact with the felt heald 6 to produce a wall plate with a thickness of 6 cm.

In this process, when winding up the seed layer on the making roll 7, a diameter 500 with a wavy uneven surface with an unevenness difference of 0.3 m is prepared.
It was rolled up while being pressed with a roll 8 of 1.5 mm in diameter to a linear pressure of 5 kg/cm.

Next, the laminated plate body to a thickness of 6 fi was cut with a wire, peeled off from the making roll 7, and rolled out flat.
Thereafter, it was pressed and cut according to conventional methods, and then cured in an autoclave to a thickness of 5.5fi.
A test piece with a length of 900 mm and a medium size of 45 mm was obtained.

Example 2 Same as Example 1 except that instead of the roll with the wavy and uneven surface used in Example 1, a low-left roll with uniformly distributed microprotrusions of 0.3 m in height was used. A test piece was obtained.

Each of the above test pieces was subjected to strength tests based on JIS No. 4 and glabella! ! [When an explosion resistance test was conducted as a test, the bending strength was 109 kg/-, and the explosion resistance test showed that the water content was 40%, with no explosion in all cases.

As a comparative example, a similar test was conducted on a test piece that was not pressed with rolls, and the bending strength was 110 kg/d for test pieces with the same thickness and size, but the explosion resistance test was performed with a moisture content of 40%. , all of them exploded.

〔effect〕

As explained above, according to the method of the present invention, when the seed layer is laminated, the seed layer is laminated by being strongly pressed while being given unevenness on the making roll, so that these unevenness bites between the layers. It has various effects, such as increasing the strength of mutual adhesion, and also expelling air between the eyebrows, thereby preventing the product from peeling off between the eyebrows, and facilitating manufacturing control.

[Brief explanation of drawings]

FIG. 1 is a side view of an apparatus for carrying out the method of this invention;
The figure shows an enlarged side view of the main parts of the implementation device.

Claims (1)

[Claims] (1) When manufacturing inorganic wallboard by the papermaking method, when laminating the seed film on the making roll to a predetermined thickness, the surface of the seed film on the making roll is rolled up while being pressed with a textured roll. A method for manufacturing an inorganic wallboard, characterized by: