JP3732382B2 - Manufacturing method of inorganic board - Google Patents
Manufacturing method of inorganic board Download PDFInfo
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- JP3732382B2 JP3732382B2 JP2000085138A JP2000085138A JP3732382B2 JP 3732382 B2 JP3732382 B2 JP 3732382B2 JP 2000085138 A JP2000085138 A JP 2000085138A JP 2000085138 A JP2000085138 A JP 2000085138A JP 3732382 B2 JP3732382 B2 JP 3732382B2
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- Japan
- Prior art keywords
- smooth
- inorganic plate
- cutting
- inorganic
- product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【０００１】
【発明の属する技術分野】
この出願の発明は、無機質板の製造方法に関するものである。さらに詳しくは、この出願の発明は、乾燥時に製品部までクラックが進展するのを抑制するとともに、切断精度を向上させ、品質に優れた製品を生産可能とする無機質板の製造方法に関するものである。
【０００２】
【従来の技術】
住宅等の外壁材や屋根材、また、天井材等としてセメント系の無機質板が広く用いられている。この無機質板は、例えば図５に示したように、製品となる製品部（１）の四周端縁に耳部（２）を設けて成形され、硬化に次ぎ、含水率調整のための乾燥後に所定のサイズに切断される。この時の切断により耳部（２）は切り落とされるが、耳部（２）は、切断のばらつきを吸収するという重要な機能を有している。
【０００３】
【発明が解決しようとする課題】
一方、耳部（２）には乾燥の際にクラック（３）が生じることがある。短時間で乾燥すればするほどその傾向が高まる。発生したクラック（３）は、耳部（２）の厚み、幅等の状態によっては製品部（１）にまで進展することがある。
【０００４】
また、耳部（２）は、前記の通り、切断のバラツキを吸収するものであるが、その幅にバラツキが生じると、切断のバラツキを吸収することができず、所定サイズに精度よく切断することができなくなる。
【０００５】
しかも、図５に示したような製品部（１）に目地（４）を有する無機質板の場合、耳部（２）を設けていても切断位置が微妙にずれてしまう。それと言うのも、切断位置は、図６に示したように、製品部（１）の端縁において製品部（１）の表面から距離（ｄ）下がった位置に設定されているからである。したがって、目地（４）の切断位置は目地底（４ａ）の表面から距離（ｄ）下方とされ、図６に示したように、目地（４）以外での切断位置とずれが生じる。
【０００６】
このようなクラック（３）の進展並びに切断精度の低下は製品不良を引き起こす。
この出願の発明は、以上の通りの事情に鑑みてなされたものであり、従来の無機質板の製造方法の欠点を解消し、乾燥時にクラックが製品部まで進展するのを抑制するとともに、切断精度を向上させ、品質に優れた製品を生産可能とする無機質板の製造方法を提供することを目的としている。
【０００７】
【課題を解決するための手段】
この出願の発明は、上記の課題を解決するものとして、無機質板の成形に際して、四周端縁の耳部とこの耳部の内側に位置する製品部との境界域に、上面が平滑面である平滑部を、製品部の厚み範囲内若しくはそれ以上でかつ全体にわたり均一な厚みとして形成し、平滑部の平滑面から一定距離下がった位置で無機質板を切断することを特徴とする無機質板の製造方法（請求項１）を提供する。
【０００８】
またこの出願の発明は、平滑部の耳部側端縁に沿って流れ止め目地を形成すること（請求項２）を好ましい態様として提供する。
以下、図面に沿ってこの出願の発明の無機質板の製造方法についてさらに詳しく説明する。
【０００９】
【発明の実施の形態】
図１は、この出願の発明の無機質板の製造方法により作製された成形後の無機質板の概要を示した平面図である。図２は、成形後の無機質板の一形態を示した要部斜視図である。
【００１０】
例えばこの図１及び図２に示したように、この出願の発明の無機質板の製造方法では、無機質板の成形に際して、四周端縁の耳部（２）とこの耳部の内側に位置する製品部（１）との境界域に、上面が平滑面（５ａ）である平滑部（５）を形成する。平滑部（５）の厚み（ｔ5）は、製品部（１）の厚み（ｔ1）の範囲内若しくはそれ以上とするとともに、全体にわたって均一な厚みとしている。一般に、製品部（１）の表面には成形時に模様が形成され、表面は凹凸面状となる。この凹凸面状の表面のために、製品部（１）の厚み（ｔ1）は一定でなく、ある範囲を持つ。この出願の発明の無機質板の製造方法において平滑部（５）の厚み（ｔ5）は、そのような製品部（１）の厚み（ｔ1）の範囲内かあるいはそれ以上とされ、しかも全体にわたり均一となっている。
【００１１】
このような平滑部（５）では、乾燥時の含水率は耳部（２）よりもやや高く保たれ、破壊靭性が高く保持される。その結果、たとえ耳部（２）に図５に示したようなクラック（３）が発生することがあっても、その進展は平滑部（５）で抑えられ、製品部（１）に達することはほとんどない。
【００１２】
また、平滑部（５）は、切断の位置決めに利用することができ、切断の精度を向上させる。すなわち、切断の位置決めを製品部（１）ではなく、平滑部（５）に基づいて行うと、切断位置は、図３に示したように、平滑部（５）の平滑面（５ａ）から距離（ｄ）下がった位置に設定される。平滑部（５）は、前記の通り、全体にわたり均一な厚みを有しており、製品部（１）と異なって図４に示したような目地（４）は存在しない。したがって、切断の位置決めを平滑部（５）に基づいて行うことにより、切断位置は一定となり、ずれは生じない。
【００１３】
ところで、切断に際して無機質板は切断装置に搬送され、所定位置で停止された後切断される。一般に、無機質板の停止位置は搬送方向の前後に若干ばらつく。しかしながら、切断の位置決めを平滑部（５）に基づいて行うことができるため、無機質板の停止位置が搬送方向の前後に若干ばらついても切断位置はなんら影響を受けない。しかも、切断は、耳部（２）の状態に影響されない。幅にばらつきが生じたとしても、切断の位置決めは平滑部（５）に基づいて行えるため、無機質板は所定サイズに精度よく切断される。
【００１４】
図４は、この出願の発明の無機質板の製造方法により作製された成形後の無機質板の別の形態を示した要部斜視図である。
この図４に示したように、この出願の発明の無機質板の製造方法では、無機質板には、成形時に、平滑部（５）における耳部（２）の側端縁に沿って流れ止め目地（６）を形成することができる。流れ止め目地（６）は、製品部（１）の模様付けのためにプレス成形する際に、材料が成形型から流出するのをせき止める流れ止めが材料表面に押し付けられた結果形成された目地である。流れ止めは成形型の成形面に配設される。このような流れ止め及び流れ止め目地（６）は、無機質板が比較的流動しやすい材料から形成される場合に有効であり、プレス成形時に材料表面に切れが発生するのを防止する。平滑部（５）を形成するこの出願の発明の無機質板の製造方法においても流れ止め目地（６）は同様に形成することができ、この場合、流れ止め目地（６）は、平滑部（５）の耳部（２）側端縁に沿って形成することができる。
【００１５】
勿論、この出願の発明は、以上の実施形態によって限定されるものではない。製品部、平滑部、及び耳部の形状、大きさ等の細部については様々な態様が可能であることは言うまでもない。
【００１６】
【発明の効果】
以上詳しく説明した通り、この出願の発明によって、乾燥時にクラックが製品部まで進展するのが抑制されるとともに、切断精度が向上する。品質に優れた製品が生産可能となる。
【図面の簡単な説明】
【図１】この出願の発明の無機質板の製造方法により作製された成形後の無機質板の概要を示した平面図である。
【図２】この出願の発明の無機質板の製造方法により作製された成形後の無機質板の一形態を示した要部斜視図である。
【図３】無機質板の切断位置を示した要部断面図である。
【図４】この出願の発明の無機質板の製造方法により作製された成形後の無機質板の別の形態を示した要部斜視図である。
【図５】この出願の発明前の無機質板の切断前の状態を示した要部斜視図である。
【図６】無機質板の切断位置を示した要部断面図である。
【符号の説明】
1 製品部
2 耳部
3 クラック
4 目地
4a 目地底
5 平滑部
5a 平滑面
6 流れ止め目地[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to a method for producing an inorganic plate. More specifically, the invention of this application relates to a method for manufacturing an inorganic plate that suppresses the crack from progressing to a product part during drying, improves cutting accuracy, and enables production of a product having excellent quality. .
[0002]
[Prior art]
Cement-based inorganic boards are widely used as outer wall materials, roofing materials, and ceiling materials for houses. For example, as shown in FIG. 5, this inorganic plate is formed by providing ears (2) at the four peripheral edges of a product part (1) to be a product, and after drying, after drying for moisture content adjustment. It is cut into a predetermined size. Although the ear part (2) is cut off by the cutting at this time, the ear part (2) has an important function of absorbing variation in cutting.
[0003]
[Problems to be solved by the invention]
On the other hand, cracks (3) may occur in the ear (2) during drying. This tendency increases with drying in a short time. The generated crack (3) may spread to the product part (1) depending on the thickness, width, etc. of the ear part (2).
[0004]
Further, as described above, the ear portion (2) absorbs the variation in cutting. However, if the width varies, the ear portion (2) cannot absorb the variation in cutting and accurately cuts to a predetermined size. I can't.
[0005]
And in the case of the inorganic board which has the joint (4) in the product part (1) as shown in FIG. 5, even if the ear | edge part (2) is provided, a cutting position will shift | deviate delicately. This is because, as shown in FIG. 6, the cutting position is set at a position that is a distance (d) lower than the surface of the product part (1) at the edge of the product part (1). Therefore, the cutting position of the joint (4) is a distance (d) below the surface of the joint bottom (4a), and as shown in FIG. 6, the cutting position other than the joint (4) is shifted.
[0006]
Such progress of crack (3) and reduction in cutting accuracy cause product failure.
The invention of this application has been made in view of the circumstances as described above, eliminates the drawbacks of the conventional method of manufacturing an inorganic plate, suppresses cracks from progressing to the product part during drying, and provides cutting accuracy. An object of the present invention is to provide a method for producing an inorganic board that can improve the quality and produce a product having excellent quality.
[0007]
[Means for Solving the Problems]
In the invention of this application, in order to solve the above-mentioned problem, when forming the inorganic plate, the upper surface is a smooth surface in the boundary region between the ear part of the four-circumferential end edge and the product part located inside the ear part. A smooth part is formed as a uniform thickness within the thickness range of the product part or more and over the entire part, and the inorganic board is cut at a position a certain distance from the smooth surface of the smooth part. A method (claim 1) is provided.
[0008]
Moreover, the invention of this application provides as a preferred embodiment that a flow stop joint is formed along the edge side edge of the smooth portion (Claim 2).
Hereinafter, the manufacturing method of the inorganic board of the invention of this application will be described in more detail with reference to the drawings.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a plan view showing an outline of an inorganic plate after molding produced by the method for producing an inorganic plate of the invention of this application. FIG. 2 is a perspective view showing a main part of one embodiment of the inorganic plate after molding.
[0010]
For example, as shown in FIGS. 1 and 2, in the method of manufacturing an inorganic board according to the invention of this application, when the inorganic board is formed, the ears (2) at the four peripheral edges and the products located inside the ears A smooth portion (5) whose upper surface is a smooth surface (5a) is formed in a boundary area with the portion (1). The thickness of the smooth portion (5) (t 5), together with the thickness (t 1) range or more of the product portion (1), and a uniform thickness throughout. In general, a pattern is formed on the surface of the product part (1) during molding, and the surface is uneven. Because of this uneven surface, the thickness (t 1 ) of the product part ( 1 ) is not constant and has a certain range. In the manufacturing method of the inorganic plate of the invention of this application, the thickness (t 5 ) of the smooth portion (5) is within the range of the thickness (t 1 ) of the product portion (1) or more, and the whole It is uniform over.
[0011]
In such a smooth part (5), the moisture content at the time of drying is kept slightly higher than that of the ear part (2), and the fracture toughness is kept high. As a result, even if a crack (3) as shown in FIG. 5 occurs in the ear part (2), the progress is suppressed by the smooth part (5) and reaches the product part (1). There is almost no.
[0012]
Moreover, the smooth part (5) can be used for positioning of cutting, and improves the accuracy of cutting. That is, when positioning of cutting is performed based on the smooth portion (5) instead of the product portion (1), the cutting position is a distance from the smooth surface (5a) of the smooth portion (5) as shown in FIG. (D) Set to a lowered position. As described above, the smooth portion (5) has a uniform thickness throughout, and unlike the product portion (1), there is no joint (4) as shown in FIG. Therefore, by performing the positioning of the cutting based on the smooth portion (5), the cutting position becomes constant and no deviation occurs.
[0013]
By the way, at the time of cutting, the inorganic board is conveyed to a cutting device, stopped at a predetermined position, and then cut. In general, the stop position of the inorganic plate varies slightly before and after in the transport direction. However, since the positioning of the cutting can be performed based on the smooth portion (5), the cutting position is not affected at all even if the stop position of the inorganic plate varies slightly before and after in the transport direction. Moreover, the cutting is not affected by the state of the ear (2). Even if the width varies, since the positioning of cutting can be performed based on the smooth portion (5), the inorganic board is accurately cut into a predetermined size.
[0014]
FIG. 4 is a perspective view showing a main part of another form of the formed inorganic plate produced by the method for manufacturing an inorganic plate of the present invention.
As shown in FIG. 4, in the method of manufacturing an inorganic plate according to the invention of this application, the inorganic plate has a flow joint along the side edge of the ear portion (2) in the smooth portion (5) during molding. (6) can be formed. The flow stop joint (6) is a joint formed as a result of the flow stop being pressed against the material surface to prevent the material from flowing out of the mold during press molding for patterning of the product part (1). is there. The flow stop is disposed on the molding surface of the mold. Such a flow stop and a flow stop joint (6) are effective when the inorganic plate is formed from a material that is relatively easy to flow, and prevents the material surface from being cut during press molding. In the manufacturing method of the inorganic plate of the invention of this application for forming the smooth portion (5), the flow stop joint (6) can be formed in the same manner. In this case, the flow stop joint (6) is the smooth portion (5). ) Along the edge of the ear (2) side.
[0015]
Of course, the invention of this application is not limited to the above embodiments. It goes without saying that various aspects are possible for details such as the shape and size of the product part, the smooth part, and the ear part.
[0016]
【The invention's effect】
As described above in detail, according to the invention of this application, cracks are prevented from progressing to the product part during drying, and cutting accuracy is improved. Products with excellent quality can be produced.
[Brief description of the drawings]
FIG. 1 is a plan view showing an outline of an inorganic plate after molding produced by the method for producing an inorganic plate of the invention of this application.
FIG. 2 is a perspective view showing a main part of one embodiment of an inorganic plate after molding produced by the method for producing an inorganic plate of the invention of this application.
FIG. 3 is a cross-sectional view of a main part showing a cutting position of an inorganic board.
FIG. 4 is a perspective view showing a main part of another form of the formed inorganic plate produced by the method for manufacturing an inorganic plate of the invention of this application.
FIG. 5 is a perspective view of a principal part showing a state before cutting of the inorganic board before the invention of this application.
FIG. 6 is a cross-sectional view of a main part showing a cutting position of an inorganic plate.
[Explanation of symbols]
1 Product Department
2 Ear
3 crack
4 joints
4a Joint floor
5 Smoothing part
5a Smooth surface
6 Flow stop joint
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000085138A JP3732382B2 (en) | 2000-03-24 | 2000-03-24 | Manufacturing method of inorganic board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000085138A JP3732382B2 (en) | 2000-03-24 | 2000-03-24 | Manufacturing method of inorganic board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001269922A JP2001269922A (en) | 2001-10-02 |
| JP3732382B2 true JP3732382B2 (en) | 2006-01-05 |
Family
ID=18601520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000085138A Expired - Lifetime JP3732382B2 (en) | 2000-03-24 | 2000-03-24 | Manufacturing method of inorganic board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3732382B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4807220B2 (en) * | 2006-10-26 | 2011-11-02 | パナソニック電工株式会社 | Manufacturing method of mirror-coated body and mirror-coated body |
-
2000
- 2000-03-24 JP JP2000085138A patent/JP3732382B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001269922A (en) | 2001-10-02 |
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