JPH07214523A - Method of working surface of extrusion molded cement board - Google Patents

Abstract

PURPOSE:To provide a surface treating method of an extrusion molded cement board with the capability of being molded without the collapse of contours of a molded item and contours of a joint pattern in both the longitudinal and horizontal directions. CONSTITUTION:During the period of extrusion, groove 4 working in the extruding direction is carried out by a mold, and after a curing and hardening process, the grooves 5 in the direction perpendicuar to the extruding direction are subjected to a grinding process for making tile or stone like joint patterns in both the longitudinal and horizontal directions, thereby resolving the problem of the collapse of joints by completely restraining the pressure which may bring about the collapse of contours of a molded item and contours of joint patterns at the uncuring period immediately after the extrusion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface processing method for an extruded cement board.

[0002]

2. Description of the Related Art Conventionally, an extruded cement board having a width of 600 mm or 900 mm, which has a through hole and is made hollow and lightweight, has been widely used as an inexpensive curtain wall material.
When this is used for an outer wall that is finished by painting, the joint joint is not conspicuously preferable when the surface is smooth as a design, and some uneven pattern is desired. However, since this is an extruded product, any number of concavo-convex patterns continuous in the extruding direction can be continuously formed. Therefore, as shown in FIG. It is possible to apply processing. In the figure, 3, ... Denote the through holes described above.

However, the above-mentioned uneven pattern is a groove pattern in only one direction, is simple and has no interest, and a two-way uneven pattern such as brickwork is desired in design. In this case, the vertical and horizontal joints are attached by pressing or the like at the uncured stage immediately after extrusion.

[0004]

However, according to the conventional means, the molded product immediately after extrusion has a high degree of plasticity, and the material is compressed and rolled by the press pressure to generate a flow, so that the pattern contour of the joint to be formed and the molded product contour are formed. There was a problem that it was finished in a broken shape. The present invention has been made in view of such problems of the conventional technique, and an object thereof is to obtain a joint pattern contour and a molded product contour when forming joints in two directions in the vertical and horizontal directions in an extrusion-molded cement board. It aims to provide a method that can be shaped without any collapse.

[0005]

In order to achieve the above object, a surface processing method for an extrusion-molded cement board according to the present invention is such that a groove is formed in the extrusion direction on the surface by a die at the time of extrusion, and the extrusion direction is set after curing. And a groove in the orthogonal direction is ground to form a tile-like or stone-like joint pattern in the vertical and horizontal directions.

[0006]

[Function] Since the pre-formed groove has strength by curing and hardening, there is no fear that it will collapse in the subsequent grinding process. Thus, the joint pattern in the vertical and horizontal directions is formed without impairing its contour.

[0007]

EXAMPLES Examples will be described with reference to FIGS. The grooves 4, ... Of the surface in the extrusion direction can be processed freely by providing a groove-forming projection on the die with the fine pitch shown in FIG. 1 or with the single center line shown in FIG. After the curing of the groove 4 is completed, the groove 5 in the orthogonal direction is ground. Since the groove 5 is ground and the groove 4 has sufficient strength by curing and curing, there is no collapse when the subsequent groove 5 is crossed.

Thus, it is possible to form the joints in the vertical and horizontal directions that are sharp on the extruded cement board.

[0009]

Since the present invention is constructed as described above, it has the following effects. It does not apply any force that causes collapse at the time of uncured after extrusion, and since the groove processing in the later process is after curing and curing, it may cause collapse in the contour of the molded product and the joint pattern contour. It is possible to finish with a sharp and excellent design surface finish. As a result, the conspicuous joint joint is eliminated.

[Brief description of drawings]

1 (a), (b) and (c) are a plan view, a side view and a front view of an extrusion molded cement plate which is a processing method of the present invention.

2 (a), (b), and (c) are a plan view, a side view, and a front view of an extrusion-molded cement board according to the processing method of the present invention.

3 (a), (b), and (c) are a plan view, a side view, and a front view illustrating unidirectional groove processing in a conventional extrusion-molded cement board.

[Explanation of symbols]

 1 Extruded cement board 2 Groove 3 Through hole 4 Groove 5 Groove

Claims (1)

[Claims] 1. Tile-shaped or stone-shaped vertical and horizontal 2 by grooving in the extrusion direction on the surface by a die at the time of extrusion and grinding the grooves in the extrusion direction and the orthogonal direction after curing and curing.
A surface processing method for an extruded cement board, characterized in that a directional joint pattern is provided.