JPH0957728A - Method of manufacturing corrugated building materials - Google Patents

Abstract

(57) [Abstract] [Purpose] To form a corrugated sheet with high pollution resistance and high frost resistance. [Constitution] At least cement 2 and pulp fiber 3
And silica 4 having a Blaine value of 8000 to 15000 cm ² / g to form a hydraulic slurry S, and the hydraulic slurry S is formed into a plate shape. The plate 1 is formed, the laminated green plate 1 is corrugated, and the pressing pressure is 150 to 300 Kg / cm ^2.
Then, the corrugated plate B is formed by pressing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to forming a laminated raw plate by stacking a plurality of layers of a raw plate material obtained by molding a hydraulic slurry into a plate shape, and imparting a corrugated shape to the laminated green plate and pressing. The present invention relates to a method of manufacturing a corrugated plate building material for forming a corrugated plate.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing this type of corrugated plate building material, for example, a raw plate material is formed by using a hydraulic slurry whose main compounding material is cement / asbestos, and a plurality of layers of the raw plate material are stacked. The corrugated sheet was formed by applying a corrugated shape to the laminated green sheet thus formed and pressing it at a set pressing pressure of 100 Kg / cm ² or less.

[0003]

According to the above-mentioned conventional method for manufacturing a corrugated sheet building material, asbestos is used as one of the raw materials, so that there is a concern that the human body may be adversely affected at each stage of manufacturing and using the product. In addition, the corrugated sheet that is formed becomes susceptible to frost damage (a phenomenon in which water penetrates into the overlapping portions of the raw sheets that are laminated and the layers freeze when the water freezes). There is a point.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems and provide a method for producing a corrugated sheet building material capable of forming a corrugated sheet having high pollution resistance and high frost damage resistance.

[0005]

To achieve this object, at least the characteristic features of the present invention according to claim 1 are as follows:
Cement, pulp fiber, and Blaine value of 8000 to 1
5,000 cm ² / g of silica is blended to form the hydraulic slurry, and a raw plate material obtained by forming the hydraulic slurry into a plate shape is laminated into a plurality of layers to form a laminated raw plate. With a corrugated shape, press pressure of 150-
The corrugated plate is formed by pressing at a pressure of 300 Kg / cm ² .

A feature of the present invention according to claim 2 is that the corrugated plate is cured by autoclaving after the pressing.

[Operation] According to the characterizing feature of the present invention according to claim 1, at least the cement, the pulp fiber, and
A Blaine value of 8000 to 15000 cm ² / g of silica is blended to form the hydraulic slurry, and a raw plate material obtained by forming the hydraulic slurry into a plate shape is stacked in a plurality of layers to form a laminated raw plate, Since the corrugated sheet is formed by applying a corrugated shape to the laminated green plate and setting the pressing pressure to 150 to 300 Kg / cm ² , the corrugated sheet can be reinforced with pulp fibers, and asbestos is used. Pollution-free is improved compared to what is done. Further, it is possible to form a corrugated sheet having extremely high frost damage resistance by the combined effect of cement, pulp fiber and silica (the above-mentioned Blaine value) and the setting of the above-mentioned pressing pressure range. Table 1 shows the experimental results for confirming the frost damage resistance. The experiment is AS
It was carried out in accordance with TMC-666, and the state of delamination after 300 ∞ was visually observed to evaluate frost damage resistance.
In the table, ◯ indicates that there is no peeling, and x indicates that there is peeling. or,
The hydraulic slurry was compounded at the values shown in Tables 2 and 3.

[0008]

[Table 1]

[0009]

[Table 2] Cement 35% Silica 30% Pulp fiber 6% Filler 29%

[0010]

[Table 3] Cement 85% Asbestos 15%

As can be seen from these results, when the Blaine value of silica is 8000 cm ² / g or more, the pressing pressure is 1
According to the specification of 50 kgf / cm ² or more, frost damage resistance can be secured. However, if the Blaine value of silica exceeds 15,000 cm ² / g, the pressing pressure is 150 k
According to the specification exceeding gf / cm ² , the frost damage resistance is saturated.

According to the characterizing feature of the present invention according to claim 2, since the corrugated sheet is autoclaved after the pressing, it is possible to increase the strength of the corrugated sheet and prevent dimensional changes. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The method for forming a corrugated sheet building material in this embodiment is to form a corrugated sheet in a cement-based roofing material production line L, in which a hydraulic slurry (hereinafter simply referred to as slurry) S is formed into a flat plate shape. Shape and make raw board P,
The raw plate material P is wound up on a making roll R to be laminated, the laminated raw plate 1 is developed from the roll R, water is replenished to the front and back surfaces of the laminated raw plate 1, and the corrugated plate is formed.

The slurry S is composed of cement 2, and raw materials such as pulp fiber 3, silica 4, filler X, water 5 and the like, and is continuously discharged onto a conveyor to obtain a raw plate P having a predetermined thickness. Is molded into. The composition is shown in Table 4.
The silica 4 has a Blaine value of 8000 to 15
It is preferable to use those of 000 cm ² / g.

[0016]

[Table 4] Cement 35% Silica 30% Pulp fiber 6% Filler 29%

Next, the outline of the production line L shown in FIG. 1 will be described. The production line L includes a first line 6 that forms a laminated green sheet 1 by laminating a green sheet material P made of the slurry S, and a corrugated sheet B that corrugates the laminated green sheet 1 formed in the first line 6. It is composed of a second line 7 for molding and pressing, and a line for curing, undercoating, autoclave curing, and overcoating the corrugated sheet B molded in the second line 7, which is not shown in the figure. .

The first line 6 is provided with a raw material mixing device 8 for manufacturing the slurry S by mixing the cement 2, the pulp fiber 3, the silica 4, the filler X, and the water 5, and the slurry S is formed into a plate-like body. A conveyor for conveying is provided, and a making roll R for forming the laminated green sheet 1 by winding up the slurry S conveyed while removing a certain amount of water on the endless filter cloth 9 of the conveyor and laminating the slurry S into a plurality of layers is provided. Configured. Incidentally, the water content of the slurry S is adjusted to approximately 45% on the endless filter cloth 9.

The second line 7 is provided with a water replenishing device 10 for replenishing water on the front and back surfaces of the plate-shaped laminated green plate 1 unfolded from the making roll R to increase the water content, and the laminated green plate 1 is waved. The plate B is provided with a pressing device 11 for forming and pressing.

Next, how the corrugated plate B is manufactured in the above-mentioned manufacturing line L will be described in detail. First, cement 2, pulp fiber 3, silica 4, filler X, and water 5 are put into the raw material mixing device 8 and mixed to produce a slurry S for forming the laminated green board 1. The raw plate material P is formed by causing the endless filter cloth 9 in one line 6 to flow. The raw plate material P moving along the first line 6 together with the endless filter cloth 9 is wound around a making roll R in a state where moisture is removed to some extent, and a plurality of raw plate materials P are laminated on the peripheral surface of the making roll R. The laminated green board 1 is formed.
The laminated green plate 1 wound around the making roll R is
It is cut and developed at the cutting surface along the roll axis and transferred from the making roll R to the second line 7. The laminated green plate 1 transferred to the second line 7 is sprayed with water on its front and back surfaces by the water replenishing device 10 to increase the water content. Then, the corrugated sheet B is formed by being sent to the pressing device 11 and sandwiching the laminated green sheet 1 by an upper die and a lower die having a corrugated press surface. The pressing pressure at that time is preferably 150 to 300 kgf / cm ² . The corrugated plate B is placed on a corrugated support plate having a shape that follows the corrugation, is sent to the subsequent process without losing its shape, and is subjected to autoclave curing through each process.

[0021]

According to the method of manufacturing a corrugated sheet building material of the present invention,
Since it becomes possible to form a corrugated sheet having high pollution resistance and high frost damage resistance, the quality of the corrugated sheet building material can be improved.

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 drawings]

FIG. 1 is a conceptual diagram showing a production line of an embodiment.

[Explanation of symbols]

 1 laminated green board 2 cement 3 pulp fiber 4 silica B corrugated board P green board material S hydraulic slurry

Continuation of front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location B32B 13/04 B32B 13/04 C04B 28/18 C04B 28/18 E04C 2/32 E04C 2/32 E // ( C04B 28/18 16:02) 111: 12 111: 20

Claims (2)

[Claims] 1. A hydraulic slurry (S) is formed into a plate shape.
Laminated raw material (P) is laminated in multiple layers to form a laminated raw material (1).
Then, add a corrugated shape to the laminated green plate (1) and
In corrugated sheet (B)
At least cement (2) and pulp fiber (3)
Blaine value is 8000 to 15000 cm²/ G of silica
(4) is blended to form the hydraulic slurry (S).
And, the pressing pressure of the laminated green plate (1) is 150 to
300 kg / cm ²To form the corrugated plate (B)
Method for manufacturing corrugated building materials. 2. The method for producing a corrugated building material according to claim 1, wherein the corrugated sheet (B) is subjected to autoclave curing after the pressing.