JPS62222803A - Method of forming patterned cement molded shape - 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] This invention relates to a method for forming a cement molded article having an uneven pattern on its surface.

[Conventional technology]

Conventionally, in order to form a cement molded product with an uneven pattern on the surface, methods such as forming an uneven pattern on a mold in advance and pouring concrete, or blasting the surface of a concrete plate with a flat surface, etc. method has been used.

[Problem that the invention seeks to solve]

According to the former method, a large number of molds are required to produce a large number of plates, which increases the initial investment. According to the latter, there is a problem in that the cost is extremely high because production requires manpower.

[Means to solve problems]

In order to solve this problem, in the present invention, a pressed pattern is applied to the surface of an uncured cement molded product immediately after extrusion molding, and then the cement molded product is hardened.

[Effect]

With this configuration, cement molding can be performed using an existing extrusion molding machine, so if you have an extrusion die, a roll with an uneven pattern, or a press pattern plate, you can produce molding with a pattern, so the initial investment can be reduced. . In addition, production costs are low because continuous mass production by extrusion is possible.

[Example 1] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in Figure 1, according to the production technique of asbestos-reinforced hollow extruded plates, an asbestos-reinforced cement mixture hardened to the extent that it can maintain its shape immediately after extrusion is extruded using an extruder 1, and an uncured green plate is produced. Form body 2. Immediately after extrusion 7, pressure is applied between the engraving pattern roll 31 and the support roll 32 with the width of the extrusion molding line, 11: An uneven pattern 4 is formed on the surface of the plate.

A take-off table 5 that extrudes the raw board and moves at two speeds.
After taking it to the top, it is placed in a curing room and heated to harden.
A cement board with an uneven pattern is formed.

The cement board thus formed is cut into any size and installed on an external wall or the like.

[Example 2] A patterned plate 6 is prepared by forming a thin steel plate into an uneven shape.

As shown in FIG. 2, the plate 2 pushed out to the top of the take-up stand 5 is taken out. A pattern board 6 is laid out on the H side of the raw board body, and a partition board 7 is placed on the L- side. A second raw board body 2 is superimposed on a part of the partition plate and taken out.

A pattern board 6 is placed on 1- of this raw board body. By such an operation, several plates are stacked one on top of the other, and by utilizing the weight of the plates and applying further pressure if necessary, the convex portions of the pattern board 6 bite into the surface of the green plate.

The pattern board and the partition board may be integrated in advance (7,
Of course, a method such as using a patterned plate with unevenness on both sides may also be used.

The patterned green board is cured in a curing room to form a patterned cement board. The top of the pattern is colored by spray painting. In the case of a stone pattern, it is convenient to mix black stone powder into the cement 1 mixture to easily obtain a cement board with a stone pattern.

The patterning on the lV board is limited to two examples.
Instead, it is possible to apply uneven patterns by pressing with various methods before curing, such as partial imprinting by stamping, or U with a composite pattern, in which a different pattern is applied to a part of the entire surface pattern.

In addition, in the present invention, extrusion is carried out on a front bank, so it is difficult to use rice grain, but since it can be reinforced by inserting iron wire or steel strips in the direction of extrusion during the extrusion stage, it is possible to use cement boards with high strength. It can be used as a substrate. or,
Conventionally, extruded cement is reinforced by mixing asbestos, but in addition to asbestos, it can also be reinforced with synthetic fibers, carbon fibers, etc.

During production, press processing is performed on unhardened cement moldings, so
Rather than a hollow plate like conventional extruded plates, the molded product is preferably one that is close to a solid body with few hollow parts, or one that has few hollow parts and ribs. For example, as illustrated in FIG. 3, a groove 9 into which the mounting bracket 8 is inserted may be provided on the back surface.

Patterns produced by the method of the present invention include stone patterns, masonry patterns, brickwork patterns, geometric patterns, lattice patterns,
There is no particular limitation to the wood grain pattern. The shape is not limited to a plate, but may be a columnar or narrow plate, and 7 may also be used.

〔effect〕

Since the present invention is configured as described above, it has the following features.

■ Existing machines can be used for extrusion molding, and the only special requirements are an extrusion die 7 and a pattern plate made of thin steel plate, so the initial investment is small. Also, to put it the other way around, it is possible to form many types of patterns relatively easily.

■ Extrusion molding is continuous molding and has high production efficiency, so it can produce concrete plates with a low cost of 1-.

■ Extrusion molding allows the production of long objects several meters long without the need for large molds, and can meet demands that were economically impossible with conventional techniques.

■ Extruded cement board has a low water/cement ratio and is extruded under high pressure, resulting in a compressive strength of 500 k,
Since the high-strength cement board described above is obtained, and can be further reinforced with iron wire or steel band, a large-sized, high-strength patterned cement board can be obtained, which can be used in new fields.

■ Extruded cement boards are convenient for construction because they are easy to cut on site.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are side views showing an example of the production method, and FIG. 3 is a front sectional view showing an example of the cross-sectional shape of the plate and the mounting method. 1. Extruder, 2. Raw board body, 31. Engraved pattern roll, 32. Support roll, 4. Uneven pattern, 5. Take-up stand, 6. Pattern board, 7. Partition board, 8...Mounting bracket, 9...Groove. Kiyoshi Shiraki, Representative of Applied Planning, Patent-Shinbyoujin Co., Ltd.

Claims (1)

[Claims] A method for forming a patterned cement molded article, in which a pattern is pressed onto the surface of an extrusion-molded, uncured cement body, and then hardened.