JPH08238615A - Manufacture of building board - Google Patents

Abstract

PURPOSE: To enhance the efficiency of tongue cutting process by a method wherein a tongue, the removal amount from which is smaller, is machined at the side part, which has located at the middle part of stock board, of each split board, while a tongue the removal amount from which is larger, is machined at the side part, which has located at the side part of the stock board, of each split board at the machining of a pair of the tongues in each split board. CONSTITUTION: In both split boards 2 and 2, as indicated in the side surface on their short side sides in the figure, pairs of shiplap tongues 3 and 4 are machined at the side parts of respective long sides. In this case, at the side parts, which have located at the middle part of stock board, of each split board 2 or at the right side part of the left side split board 2 and at the left side part of the right side split board 2, respective upper tongues 3 are machined, while at the side parts, which have located at the side parts of the stock board, of the respective split boards 2 or at the left side part of the left side split board 2 and at the right side part of the right side split board 2, respective lower tongues 4 are machined. Or, at the machining of a pair of shiplap tongues 3 and 4 in each split board 2, the upper tongue 3, the removal amount from which is smaller, is machined at the hard side part, which has located at the middle part of the stock board, while the lower tongue 4, the removal amount from which is larger, is machined at the non-hard side part, which has located at the side part of the stock board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a building board mainly used as an exterior board.

[0002]

2. Description of the Related Art A building board of this type is formed by forming a raw material containing cement, which is a hydraulic material, into a plate having a size twice as large as the product size by a dry method or a wet method, and stacking the formed boards. As shown in FIG. 7, the original plate 1 of a large cement board is cut off at the edges and is divided into two equal parts to form two divided plates 2 of approximately the product size.
Then, a pair of fruit 3, 4 such as a notched fruit or a real fruit is cut and coated to give a product having a predetermined size.

[0003]

However, in the method of manufacturing a building board as described above, when curing a plurality of forming boards in a stacked state, the heat generated by the hydraulic reaction of the cement is formed. Since the central part of the plate or the original plate is less likely to be released from the peripheral part, the hardening of the cement is promoted in the central part of the molded plate or the original plate than the peripheral part. The central part of the original plate is harder than the peripheral part. Therefore, in the process of cutting the fruit on the side portion of the divided plate, when cutting the divided plate side portion which was the central portion of the original plate, it is more than when cutting the divided plate side portion which was the side portion of the original plate. The cutting resistance is large.

Moreover, in general, the building blocks of building boards 3, 4
As shown in FIG. 4, since the lower real 4 is thinner than the upper real 3,
When the lower solid 4 is cut, the amount of cutting is larger than when the upper solid 3 is cut. As for the actual fruit, as shown in FIG. 6, when the male fruit 4a is cut, the cutting amount is larger than when the female fruit 3a is cut.

Therefore, in FIG. 7, when the lower part 4 and the male part are cut on the left side of the right divided plate 2, that is, the part which was the central part of the original plate 1, the cutting resistance is large and the cutting amount is large. Therefore, it is difficult to cut. Cutting time is long and the amount of blade wear is large.

After all, the efficiency of the process of cutting the split plate with the fruit is not high.

An object of the present invention is to solve the above conventional problems.

[0008]

According to the present invention, a raw material containing a hydraulic substance such as cement is molded into a plate to form a molded plate, and the molded plate is cured in a stacked state and cured to form an original plate.
In the method of manufacturing a building board, in which the original plate is divided into a plurality of divided plates, and each divided plate is cut with a pair of fruit such as a notched fruit or a real fruit, a pair of fruit is cut with each divided plate. At this time, the fruit with less cutting amount on each divided plate side part which was the central part of the original plate, for example, the upper fruit in the phase cut fruit and the female fruit in the actual fruit, each divided plate side part which was the side part of the original plate It is a method of manufacturing a building board, which is characterized by cutting a fruit having a large amount of cutting, for example, a solid fruit in a phase cut fruit or a male fruit in a true fruit.

[0009]

According to the present invention, when a pair of fruits is cut on each of the divided plates, the fruit having a smaller amount of cutting is placed on the harder side portion, which is the central portion of the original plate, in each divided plate. On the side that is not hard, which was the side of, the fruit with the larger cutting amount is cut.

In each of the divided plates, the hard side, which was the central part of the original plate, is not cut with the fruit having a large cutting amount. That is, the cutting process that takes a long time and has a large amount of wear of the blade is not performed.

[0011]

According to the present invention, the efficiency of the process of cutting the fruit into the dividing plate is high.

[0012]

EXAMPLE The method for manufacturing a building board of this example is a dry method for manufacturing a wood chip cement board used as an exterior board.

On the template on the carrier plate, a mixture of cement, which is a hydraulic material, wood chips and a small amount of water, is sprayed in a mat shape. The weight ratio of cement and wood chips in the raw material is 3:
First place. The weight of water is about half the weight of cement and wood chips.

The mold plates on which the raw materials are placed in a mat are stacked in a number of stages, the carrier plates of the upper mold plates are placed on the raw materials on the respective mold plates, and the plates are inserted into the press to be placed on the respective mold plates. The raw material is sandwiched between the lower template and the upper conveyor plate, and the raw material is pressed to form a rectangular plate having a size slightly larger than twice the product size to form a molded plate.

The molded plates are stacked in a number of stages and placed in a state of being pressed in a curing chamber, heated and cured, and then cured.
Use as a base plate for wood cement boards. The original plate is demolded and dried.

Thereafter, the rectangular original plate 1 having a size slightly larger than twice the product size is cut off at four edges and divided into two equal parts along the long side, as shown by the chain line in FIG. As shown in FIG.

As shown in FIG. 3 showing the side surface on the short side, each of the split plates 2 has a pair of notches 3 and 4 on the side of the long side.
To cut. At this time, the side portions of the divided plates 2 which were the central portions of the original plate 1, that is, the right side portion of the left divided plate 2 and the left side portion of the right divided plate 2 in FIG.
Is a side part of each divided plate 2 that was a side part of the original plate 1, that is, in FIG.
The lower solid 4 is cut on the right side of each.

The cross sectional dimensions of the upper 3 and lower 4 are shown in FIG.
Shown in units. The cutting cross-sectional area required for cutting the upper shell 3 is 5.5 × 9 = 49.5 mm ² . The cutting cross-sectional area required to cut the lower solid 4 is 7 × 8 = 56 mm
² When the upper solid 3 is cut, the cutting amount is 10% or more smaller than when the lower solid 4 is cut.

That is, when cutting a pair of phase cuts 3 and 4 on each of the divided plates 2, the hard side of the original plate 1 in each divided plate 2 has a small amount of cutting. The upper solid 3 is the side of the original plate 1 which is not hard, and the lower solid 4 having a large cutting amount is cut.

Divided plate 2 which is obtained by cutting the phase cuts 3 and 4
Is painted to give a product of a given size.

<Modification> 1) In the embodiment, the original plate 1 is divided into two equal parts.
As shown in FIG. Alternatively, it is unevenly divided into a plurality of sheets.

2) In the embodiment, the fruits 3 and 4 were the discontinuous fruits, but as shown in FIG. 6, the fruits 3a and 4a are used. Or other fruit.

3) In the embodiment, the original plate 1 is a wood chip cement plate, but it is a cement plate mixed with wood fiber, slag, perlite and the like.

4) In the embodiment, the manufacturing method of the building board is
Although it was a dry method, a wet method is used to make a raw material slurry.

[Brief description of drawings]

FIG. 1 is a perspective view of an original plate in a method for manufacturing a building board according to an embodiment of the present invention.

FIG. 2 is a side view of two divided plates in the method for manufacturing a building board of the same example.

FIG. 3 is a side view of two divided plates obtained by cutting a pair of fruits in the method for manufacturing a building board of the same example.

FIG. 4 is an enlarged side view of a split plate obtained by cutting a pair of fruits in the method of manufacturing a building board of the same example.

FIG. 5 is a plan view of an original plate in a method for manufacturing a building board according to a modified example.

FIG. 6 is an enlarged side view of a split plate obtained by cutting a pair of fruits in a method of manufacturing a building board according to a modification.

FIG. 7 is a side view of two divided plates obtained by cutting a pair of fruits in a method of manufacturing a building board of a conventional example.

[Explanation of symbols]

 1 Original Plate 2 Divided Plate 3 Upper Fruit 4 Lower Fruit 3,4 Pair of Phaseless Fruits 3a Female Fruit 4a Male Fruit 3a, 4a Pair of Actual Fruits

Claims (2)

[Claims] 1. A raw material containing a hydraulic material is molded into a plate shape to form a molded plate, the molded plate is cured in a stacked state and cured to form a master plate, and the master plate is divided into a plurality of divided plates. In the method of manufacturing a building board, in which a pair of fruits is cut, each piece is cut into a pair of fruits. The method for manufacturing a building board is characterized in that the fruit having the larger amount of cutting is cut on each side of the divided board which is the side of the original board. 2. A raw material containing cement is shaped into a plate to form a shaped plate, and the shaped plates are cured in a stacked state and cured to form an original plate. The original plate is divided into two divided plates, and each divided plate. In the method of manufacturing a building board that cuts a pair of complementary seeds to each, when cutting a pair of complementary seeds to each split plate,
A manufacturing method of a building board, characterized in that the upper part is cut on each side of the divided plate which was the central part of the original plate, and the lower part is cut on each side of the divided plate which was the side part of the original plate.