JPS58104705A - Manufacture of panel made of cement - 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 The present invention relates to a method for manufacturing a cement panel of a predetermined shape by supplying cement mortar into a mold and curing it. When manufacturing panels with partially different thicknesses, rapid hardening cement is used as a rounding method to prevent defects such as unsightly color spots and rib marks from appearing on the panel surface due to alkali elution. It is conceivable to use mortar made of silica or ordinary cement mixed with an appropriate amount of fast-curing material, and to harden the mortar early in the morning before the alkali has reached the surface. Although it is advantageous in terms of manufacturing efficiency because it requires fewer man-hours than painting the surface after forming, it requires a large amount of rapid-hardening cement and fast-hardening materials, which are much more expensive than ordinary cement, making it difficult to make product panels with low material costs. Approximately 81111 in terms of
It's a little more expensive (there are some drawbacks).

In view of these circumstances, the present invention aims to reduce the cost of product panels by minimizing the amount of fast-curing material used through simple improvements in construction methods, while also reducing the appearance of defects such as color spots and rib marks on the surface side. The purpose is to propose a method by which a product 11IIl can be manufactured without any problems.

The method for manufacturing a cement panel according to the present invention, which was developed to achieve the above object, is the method described in detail by Kanji, which involves supplying cement mortar mixed with a quick-hardening material into the formwork to form a layer on the surface of the panel. After the surface layer of the panel has at least pseudo-set, a cement mortar containing no fast-setting agent is supplied to form the remainder of the panel.

That is, by mixing the fast-setting material only in the cement mortar for forming the panel surface layer that is visually noticeable on the heavy machinery used, the amount of high-speed setting material used can be minimized, and the amount of the fast-setting material can be reduced. While suppressing the increase in product panel cost as much as possible due to this, the remaining part of the panel is formed by supplying cement mortar after the panel surface layer has at least falsely solidified. It reliably prevents the alkali in the cement mortar from eluting to the surface side, eliminating defects such as unsightly color spots and lip marks on the surface side! II. You can obtain a product with a beautiful surface. First, according to the method of the present invention, there is no need for a decorative process for the painted cape, so the number of man-hours is reduced and efficient production is possible. .

■ As shown in Figure 1, spraying mortar in the kill frame (1) using white Portland cement as a paste, adding an appropriate amount of pigment as needed, and mixing a fast-curing material is a method. At the same time, the panel surface layer (^) is formed by defoaming by means of rollers, for example.

Incidentally, the panel surface layer (At) is l-! 5sIllI1
4il.

An example of its formulation is as follows.

As a fast-curing material, calcium altronate solution M body (8Ca0.11AI, (
5F, ・Ca5O4) Special modified gypsum [anhydrite]
Use something consisting of.

In addition, 8 to 6 percent by weight of glass fiber is mixed with the mortar in this surface layer (A1) in order to increase its strength and to increase its adhesion with the rest (A,) described later. However, this does not need to be mixed in.

■ If the panel surface layer (A1) has at least pseudo-condensed, the panel surface layer (A1)
The middle frame (2) was placed on top, and cement mortar containing 5% by weight of glass fiber, but not containing the above-mentioned quick-hardening material, was supplied by spraying, and rollers were applied by means, etc. After defoaming, mold the remaining part of the panel (4). An example of the composition of the remaining part of the panel (As) with a thickness of Fi9 am or more is as follows.

Through the above steps, a single skin panel with a lip (4) as illustrated in FIG. 8, for example, is manufactured.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the method for manufacturing cement panels according to Kiba QIIK, and Figures 1 and 8 are longitudinal cross-sectional views for explaining each process, and Figure #I8 is a vertical cross-sectional view of a product example. . (1) Formwork, (As) Panel surface layer, (at) Panel remainder. .

Claims (1)

[Scope of Claims] ■ A method for manufacturing a cement panel of a predetermined shape by supplying cement mortar into a formwork (1) and curing it, the method comprising: mixing a fast-curing material into the formwork (lJ); After this panel surface layer (^) has at least pseudo-set, a cement mortar containing no fast-setting agent is supplied to form the rest of the panel (bird). 0. The method for manufacturing a cement panel according to claim 0, wherein the panel remainder (As) is reinforced by mixing glass fiber. .