JPH1076507A - Building material molding method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To make it possible to form different concave and convex patterns on each of green sheets for building materials without increasing the number of types of press dies. SOLUTION: After a hydraulic slurry S is fed onto a conveyor belt 1a and a powdery material G for patterning is scattered in an uneven shape on a raw plate 4 shaped into a plate shape, the raw plate 4 and the powder Body G
Is pressed to form a pattern on the surface of the raw plate 4 corresponding to the irregular pattern of the powder G, and the powder G is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material for building material which is formed into a plate by feeding a hydraulic slurry (for example, a mixture of cement, pulp fiber, silica, water, etc.) onto a conveyor belt. The present invention also relates to a method for forming a building material having an uneven pattern on its surface.

[0002]

2. Description of the Related Art Conventionally, as a method of forming this kind of building material, in order to form an uneven pattern on the surface of a raw sheet, a press die having an uneven pressing surface is directly pressed against the surface of the raw sheet. A method of forming an uneven pattern corresponding to the pattern of the uneven press surface was typical.

[0003]

According to the above-described conventional method for forming a building material, the uneven pattern formed on the surface of the raw plate always corresponds to the pattern of the press die, so that only products having the same pattern are used. In a case where the products are mass-produced and the products are arranged in parallel, the same pattern is repeated, resulting in a problem that the design is monotonous and tends to have a poor natural feeling. Further, even if a plurality of types of press dies are prepared, the types are naturally limited in view of product cost.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a method for forming a building material capable of forming a different uneven pattern on each of the green building materials without increasing the number of press dies. Is to provide.

[0005]

[Means for Solving the Problems]

[Structure] The characteristic structure of the present invention according to claim 1 is that a powdery material for patterning is scattered in an uneven shape on a raw material for building material which is formed by feeding a hydraulic slurry onto a conveyor belt and shaping it into a plate shape. After that, pressing the raw plate and the powder and granules on the surface of the raw plate corresponding to the uneven pattern of the powder and granules,
This is where the powders are removed.

A characteristic feature of the present invention according to claim 2 is that the powdery granules are colored sand.

According to the first aspect of the present invention, the patterning powder or granules sprayed on the green plate are pressed against the green plate by a press to form an uneven pattern. Therefore, it is possible to vary the concavo-convex pattern to be formed depending on the type of the granular material and the condition of spraying. For example, as an example, it is possible to make the texture of the raw plate building material surface different only by changing the particle size and the particle shape of the granular material, and by making a difference in the spray thickness. It is possible to freely form the uneven pattern. Furthermore, it is possible to shape the powdery material in a state where the powdery material is embedded in the surface of the raw plate, and it is possible to form a variety of patterns. Therefore, it is possible to easily form a different concavo-convex pattern for each sheet, and there is no need to prepare a plurality of press dies as in the related art. As a result, it is possible to easily provide a building material having a unique design and a high design feeling without a large-scale equipment change.

[0008] According to the characteristic configuration of the present invention according to claim 2, it is possible to lay colored sand on the surface of the green sheet only by performing the step of patterning the green sheet with the powder and granules,
The process can be shortened. Further, in addition to a variety of uneven patterns, a color pattern made of the colored sand can be formed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing a molding line for an outer wall panel (an example of a building material) P. An outline of the equipment will be described. The main material consisting of cement, pulp fiber, silica, etc., and water are used. The hydraulic slurry S formed by mixing is
A flow box F, which can be supplied, is provided on the transport belt 1a, and a transport device 1 is provided, which is capable of transporting and driving the sent hydraulic slurry S on the transport belt 1a. S is provided with a suction device 2 that is capable of dehydrating by sucking through the transport belt 1a for
A dispersing device 5 capable of dispersing colored sand (an example of a powdery granule for patterning) G on a raw material plate 4 for building material formed by dehydrating the hydraulic slurry S by the suction device 2. And a pressing device 3 that can freely press the green plate 4 and the colored sand G, and a powder and granular material removing device 6 that can remove and collect excess colored sand on the surface of the green plate 4 after pressing. is there.

As shown in FIGS. 1 and 2, the method of forming the raw plate 4 according to the present embodiment is such that the hydraulic slurry S is fed from the flow box F onto the conveyor belt 1a and driven in the conveying direction. The hydraulic slurry S is dehydrated by the suction device 2 through the transport belt 1a and formed into a plate-like raw plate 4. Particularly, when the surface of the raw plate 4 is provided with an uneven pattern, And colored sand G
Is sprayed in an uneven shape, and then the green sheet 4 and the colored sand G are pressed to form a surface corresponding to the uneven pattern of the colored sand G on the surface of the green sheet 4, and the excess colored sand G Is carried out by a method for removing The molded raw plate 4
Although not shown in the figure, the outer panel product is obtained through post-processing such as cutting, curing (natural curing and autoclave curing), and painting.

Next, each component of the molding line will be described in detail. The transport device 1 is configured by a belt conveyor including the transport belt 1a formed of an endless filter cloth and a driving roll 1b around which the transport belt 1a is wound. The flow box F is arranged upstream of the transfer device 1. The suction device 2 is disposed downstream of the hydraulic slurry S receiving portion of the transport device 1 so that the hydraulic slurry S on the transport belt 1a can be suctioned and dewatered through the transport belt 1a. Specifically, the transport belt 1a of the transport portion (upper side)
A suction box, which is an example of the suction device 2, is arranged along the lower surface of.

The spraying device 5 is provided on the conveyor belt 1a downstream of the suction box in the conveying direction. Then, the spraying device 5 includes the transport belt 1a.
A plurality of slit-shaped spray ports 5a are provided along the width direction. In addition, the amount of the colored sand G to be sprayed from each spray port 5a can be individually adjusted, and one spray port 5a can be adjusted.
Also, the configuration is such that the amount of application can be adjusted along the longitudinal direction of the slit (transport belt width direction). Therefore, by increasing or decreasing the amount of the colored sand G sprayed from each spray port 5a, or by increasing or decreasing the amount of spray in the longitudinal direction of the slit at one spray port 5a, the colored sand G sprayed in the shape of the raw plate 4 can be obtained. It is possible to make the layer thickness different depending on the location, and to scatter in various uneven shapes.

The pressing device 3 is disposed on the downstream side of the spraying device 5 in the conveying direction of the raw plate 4 and includes upper and lower press dies 3a and 3b having smooth press surfaces.
Can be pressed, and by pressing the green plate 4 on which the colored sand G is sprayed, the upper surface of the colored sand G layer and the lower surface of the green plate 4 are pressed by the upper and lower press dies 3a.
3b is pressed to be a parallel surface, and accordingly, irregularities corresponding to the layer thickness distribution of the colored sand G (irregularities corresponding to the irregularities on the lower surface of the colored sand G layer) are formed on the upper surface of the raw plate 4.

The granular material removing device 6 is configured so as to be able to remove and collect by spraying air on excess colored sand G on the raw plate 4 in a cover K surrounding the periphery.

On the surface of the green plate 4 thus formed,
Part of the colored sand G is integrally embedded, and the concavo-convex pattern formed by the press and the color of the colored sand are combined to form an exterior panel P having a rich texture and a unique design.

[Other Embodiment] Another embodiment will be described below. <1> The hydraulic slurry S is not limited to the mixture of cement, pulp fiber, silica, and water described in the above embodiment, and may be, for example, lime instead of cement. Further, glass fiber, carbon fiber, other reinforcing fibers, or other aggregates may be used instead of pulp fibers or silica, or a combination thereof. Further, it may contain an admixture or the like. In short, any material having hydraulic properties may be used, and these materials are collectively referred to as hydraulic slurry. <2> The press device 3 is not limited to the device having the smooth press surface described in the above embodiment,
For example, an uneven pattern may be formed.
Further, a roll press may be used instead of the flat plate press. <3> The building material is not limited to the outer wall panel described in the above embodiment, and may be, for example, an inner wall panel or a roof panel. <4> The powder and granules are not limited to the colored sand described in the embodiment on the left, but may be, for example, powders or granules of metals, ceramics, synthetic resins, and the like. The size can also be appropriately set according to the pattern to be provided on the surface of the raw board building material, and may be large, small, or a combination thereof. In short, a material that easily transmits the pressing pressure to the raw board building material, and preferably has high non-compressibility.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram illustrating a production line according to an embodiment.

FIG. 2 is an explanatory view showing a method of forming a raw plate.

[Explanation of symbols]

 1a Conveyor belt 4 Raw plate G Granular material S Hydraulic slurry

Claims (2)

[Claims] A hydraulic belt (1) is supplied with a hydraulic slurry (S).
a) A method for forming a building material in which an uneven pattern is formed on the surface of a raw material sheet for building material (4) which has been fed into the plate and shaped into a plate shape. After the granular material (G) is scattered in a concavo-convex shape, the raw plate (4) and the granular material (G) are pressed to apply the powder (G) to the surface of the raw plate (4). A method for forming a building material, wherein the molding is performed in accordance with the uneven pattern and the granular material (G) is removed. 2. The method for forming a building material according to claim 1, wherein the powdery granules (G) are colored sand.