JPH03221406A - Manufacture of concrete plate with pattern - Google Patents

Abstract

PURPOSE:To enable three-dimensional pattern to be depicted with elevated part distinguished by color by a method in which the surface mold which may be interiorly fitted onto a bottom, is used separately from a main mold, and the pattern part is preliminarily formed with the materials of different colors, and their main body is integrally molded on the pattern part. CONSTITUTION:For instance, recessed parts are formed on a plate glass 1, and the whole surface of a surface mold is coated with mold release agent. The upper surface of the surface mold is coated with first color-cement 2. Then, the recessed parts are coated with the kneaded material 2 of the first color-cement 2 by using a spatura or a trowel 6, and the kneaded material is caused not to adhere to the part except said recessed parts. Next, the surface mold 1 is set in a form 3 and is left as it is after coating with the first color-cement, and then it is cured so that the first color- cement does not appear from the recessed parts by next pouring. Then second color- cement 4 is poured into the form 3 and is deacrated and dried. When the dried and cured plate material is released from the mold, the concrete plate 5 which has prescribed pattern part 51 on its surface, is completed. Then, since the pattern part 51 is firmly stuck to a main body 52, it does not drop easily, and the luster of its surface is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a manufacturing method for mass producing patterned concrete plates.

(Prior Art) In recent years, there are cases where it is necessary to pattern the surface of concrete or mortar in various colors for aesthetic reasons.

Conventionally, various methods have been used to form the coating, but (1) Painting is difficult to form a negative pattern, requires a large number of steps, and has disadvantages such as discoloration, peeling, and lack of durability.

In addition, method (2) spraying a different color mortar has the same drawbacks as (2), as well as other drawbacks such as lack of gloss.

Furthermore, the method (1) of scraping the surface layer of mortar mixed with different materials to expose the stones (Japanese Utility Model Publication No. 5,521,172) has the disadvantage that it is complicated and lacks luster. Therefore, a method of polishing the surface by force and tossing (Japanese Unexamined Patent Publication No. 55-3
No. 4981), however, there are problems in that the work is enormous, the cost is excessive, and it also causes stone dust pollution.

(Problems to be Solved by the Invention) By the way, in order to eliminate the above-mentioned conventional drawbacks, it is possible to mass-produce standard products of uniform quality and uniform pattern at low cost in factories, and to produce them at construction sites (interior walls of houses, exterior walls, fences, etc.). It has been proposed to manufacture a concrete board that can be applied like conventional tiling, but it is difficult to form a surface pattern in an integrated color pattern. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a concrete plate that depicts a three-dimensional pattern using ridges divided by color I, using a conventional concrete plate manufacturing method.

(Means for Solving the Problems) Therefore, the present invention uses a surface mold that can be installed in the main body separately from the main body, molds the patterned parts in advance from different colored materials, and then integrates the main body. It was completed after discovering that the above problem could be achieved by molding, and the first color cement mixture was applied only to the depressions of the thin plate-like surface mold with a pattern drawn by shallow indentations. This surface mold is set in a formwork, and then a second color cement mixture is injected into the formwork, and after drying and curing, the mold is released. It's in the method.

In the present invention, the surface mold is preferably formed into a thin plate shape for convenience of being set within a mold. glass plate,
Ceramic plates, plated metal plates, hard plastic plates, etc. can be used, but glass plates are preferred because they are the easiest to use in terms of compatibility with the cement mixture and finish gloss, and commercially available molded glass is preferred. Can be used. The pattern is formed with depressions on the surface mold, but it is preferable to apply a mold release agent to the surface mold in order to make it easier to release the pattern from the mold.

The concrete mixture is composed of cement, coarse aggregate, and water, but the patterned portion is preferably adjusted to be slightly softer than the main body, and it is preferable that the patterned portion is usually colored with a pigment.

The forming method may be the usual method for forming concrete plates, and if strength is particularly required, it is preferable to dewater while applying pressure with a press. Specifically, the name of the invention “
The forming method of Manufacturing Method J of Board Materials for Building Materials (filed on December 29, 1989) may be employed. In this case, consideration must be given to the material of the formwork and surface mold so that it can withstand the pressure, such as using a plated metal plate as the surface mold, and the physical properties and blending amount of the coarse aggregate so that it can withstand the pressure. .

(Operations and Effects of the Invention) According to the present invention, the pattern portion made of the cement mixture of the first color is molded by the surface mold, and the main body portion is double molded on the surface mold set in the mold. Both of them are integrally molded at the same time, so that the pattern part is firmly fixed to the main body part, and products with the same pattern and stable quality can be mass-produced.

Further, since the pattern can be changed by replacing the surface mold, the manufacturing cost is low.

Furthermore, since the surface is manufactured by compressing it into a surface mold, it is possible to generate a good product gloss.

Hereinafter, the present invention will be specifically explained based on examples thereof.

(Example 1) FIG. 1 is a process explanatory diagram of the method of the present invention. First, a material in which a recess 11 having the dimensions shown in (2) is formed is prepared.

This depression 11 has a width of 2 to 10 mm and a depth of 2 mm, for example.
It is preferable that the above depressions are formed so that the opening angle is 60 to 160°, and the entrance and bottom of the depressions have a curvature of 1 mm or more.

Then, a mold release agent is applied to the entire surface of the surface mold 1.

Kao Liner 7 is used as a mold release agent and applied by spraying.

(2) Apply the first color cement 2 having the following composition on top of the surface mold 1.

Cement: 100 parts (by weight) Coarse aggregate: 150 parts (aluminum hydroxide) Water: 100 parts Pigment: Appropriate amount (titanium oxide manufactured by Bayer Japan) ■ Using a "spatula" or "trowel" 6, pour the first color cement mixture 2 into a depression 11 Make sure that it is applied to all areas and does not adhere to other areas (see Figure 3).

After applying the cement, leave it for about 20 minutes and allow it to harden so that the first color cement does not come out from the recess during the next injection.

(2) Inject a second color cement 4 having the following composition into the formwork 3.

Cement: 100 parts (heavy N) Coarse aggregate: 200 parts (Kansui stone: 150 parts Aluminum hydroxide: 50 parts) Water: 55 parts Pigment: Appropriate amount as required (e.g. EVA, Paifenylonox 3 manufactured by Bayer Japan)
18 Approximately 1 part) This is defoamed and dried under the following conditions.

Defoaming conditions: Vibrate the entire mold with a vibrator for 2 minutes at a frequency of 300
0c, p, m, , amplitude 2 mm Drying conditions: About 4 days at room temperature ■ When the dried and hardened board is released from the mold, a concrete board 5 having a predetermined pattern 51 on its surface is completed.

The pattern portion 51 and the main body portion 52 were firmly adhered to each other and did not easily fall off. Moreover, the surface had sufficient gloss.

(Example 2) A patterned concrete board was manufactured in the same manner as in Example 1, except that 45 parts of water and 2.5 parts of a water reducing agent were used instead of 55 parts of water in the first color cement composition.

This surface gloss is further improved than that of Example 1.

[Brief explanation of drawings]

Figures 1 - ■ are process explanatory diagrams of the method of the present invention, Figure 2 is a sectional view showing the shape of the depression in the surface mold, and Figure 3 is a sectional view showing the state of filling the first color cement into the depression in the surface mold. It is. ■...Surface type, 2...First color cement 3...
...Formwork, 4...Second color cement 5...Patterned concrete board

Claims (1)

[Claims] 1. For a thin plate-like surface mold having a pattern drawn by shallow depressions, a cement mixture of a first color is applied only to the depressions, and this surface mold is set in a mold. . A method for manufacturing a patterned concrete board, which comprises: then injecting a cement mixture of a second color into a mold, drying and curing, and then releasing the mold.