JP2006062255A - Inorganic sheet manufacturing method - Google Patents

Inorganic sheet manufacturing method Download PDF

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JP2006062255A
JP2006062255A JP2004248967A JP2004248967A JP2006062255A JP 2006062255 A JP2006062255 A JP 2006062255A JP 2004248967 A JP2004248967 A JP 2004248967A JP 2004248967 A JP2004248967 A JP 2004248967A JP 2006062255 A JP2006062255 A JP 2006062255A
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air
mold
green
released
molding
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JP4594678B2 (en
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Tomokage Komori
智景 小森
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KMEW Co Ltd
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Kubota Matsushitadenko Exterior Works Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inorganic sheet manufacturing method capable of enhancing the mold releasability of a green sheet. <P>SOLUTION: After a mold 2 is pressed to the surface of the cementitious green sheet 1 to pattern the surface of the green sheet 1, the green sheet is released from the mold 2 while blowing air against the green sheet 1 from the mold 2 to manufacture the inorganic sheet. A plurality of independent air routes 4, 4, etc. are provided in the mold 2. Air 3 is blown from the air routes 4, 4, etc. to perform air blow. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、セメントを主原料とする無機質板の製造方法に関するものである。   The present invention relates to a method for producing an inorganic board using cement as a main raw material.

従来から、セメントを主原料とし、これに繊維等を混入した成形材料を押出成形機により押出成形し、これを一定長さに切断して得た生板を、高圧のプレス成形機により表面に模様付けをし、その後、養生して表面に模様を有する無機質板（繊維補強セメント板）を製造することが行われている（例えば、特許文献１参照）。   Conventionally, a raw material obtained by extruding a molding material made of cement as a main raw material and mixed with fibers and the like by an extrusion molding machine and cutting it into a predetermined length is applied to the surface by a high-pressure press molding machine. An inorganic board (fiber reinforced cement board) having a pattern and then curing and having a pattern on the surface is manufactured (for example, see Patent Document 1).

このような無機質板の製造方法において、プレス成形機による模様付けは成形型を生板の表面に押し付けるようにして行なわれるが、押し付け後に成形型から生板が離型しにくい場合がある。そこで、エアブローにより成形型から生板を離型することが行なわれている。すなわち、図３（ａ）に示すように、成形型２の内部にエア経路４を設けると共にエア経路４と連通する複数個のエア吹出し孔２０を成形型２の成形面（下面）２ａに開口して設け、成形型２の外部からエア経路４にエア（矢印で示す）３を吹き込むと共に吹き込んだエア３をエア経路４からエア吹出し孔２０を通じて成形型２の成形面２ａに吹出すことによりエアブローを行なうものである。そして、このエアブローによる空気圧（ブロー圧）で成形型２の成形面２ａに付着した生板（ワーク）１を押圧して離型性を高めるようにしている。
特開平１１−９０９１２号公報 In such a method for producing an inorganic plate, patterning by a press molding machine is performed by pressing the forming die against the surface of the green plate, but the green plate may be difficult to release from the forming die after pressing. Therefore, the green plate is released from the mold by air blow. That is, as shown in FIG. 3A, the air path 4 is provided inside the mold 2 and a plurality of air blowing holes 20 communicating with the air path 4 are opened in the molding surface (lower surface) 2 a of the mold 2. By blowing air (indicated by arrows) 3 from the outside of the mold 2 into the air path 4 and blowing the blown air 3 from the air path 4 to the molding surface 2a of the mold 2 through the air blowing holes 20. Air blow is performed. Then, the green plate (work) 1 attached to the molding surface 2a of the mold 2 is pressed by the air pressure (blow pressure) by the air blow to improve the releasability.
JP-A-11-90912

しかし、上記のようなエアブローによる離型では確実に生板１を離型することができない場合があった。すなわち、図３（ｂ）に示すように、生板１の一部（図にイの部分で示す）のみが離型し、他の部分（図にロの部分で示す）が未だ成形型２に付着している場合は、生板１が離型できている部分に対応するエア吹出し孔２０から全体のエア３が抵抗なく吹出しやすいために、エアブローにより離型したい部分（離型できていない部分）に対応するエア吹出し孔２０からはエア３を十分に吹出すことができず、確実に離型することができないことがあった。この場合、従来ではエア経路４に吹き込むエア３の圧力を上げてブロー圧を高めるようにしているが、生板１の硬度などの制約、すなわち、ブロー圧を上げすぎると生板１を変形させる可能性があるために、ブロー圧の上昇には限界があった。   However, in some cases, the green plate 1 cannot be reliably released by the above-described release by air blow. That is, as shown in FIG. 3 (b), only a part of the green plate 1 (indicated by a portion in FIG. 3) is released, and the other portion (indicated by a portion in FIG. Is attached to the part, the entire air 3 is easily blown out without resistance from the air blowing hole 20 corresponding to the part from which the green plate 1 can be released. Therefore, the part to be released by air blow (not released) The air 3 cannot be sufficiently blown out from the air blowing hole 20 corresponding to (part), and the mold cannot be reliably released. In this case, conventionally, the pressure of the air 3 blown into the air path 4 is increased to increase the blow pressure. However, restrictions such as the hardness of the green plate 1, that is, if the blow pressure is increased too much, the green plate 1 is deformed. Because of the possibility, the increase in blow pressure was limited.

本発明は上記の点に鑑みてなされたものであり、生板の離型性を高めることができる無機質板の製造方法を提供することを目的とするものである。   This invention is made | formed in view of said point, and it aims at providing the manufacturing method of the inorganic board which can improve the mold release property of a green board.

本発明の無機質板の製造方法は、セメント系の生板１の表面に成形型２を押し付けて模様付けを行なった後、成形型２から生板１にエアブローを行ないながら成形型２から生板１を離型する無機質板の製造方法において、成形型２の内部に複数の独立したエア経路４、４…を設け、各エア経路４、４…からエア３を吹出してエアブローを行うことを特徴とするものである。   The method for producing an inorganic board according to the present invention is such that after forming a pattern by pressing the molding die 2 against the surface of the cement-based raw board 1, air blow is performed from the molding die 2 to the raw board 1. In the method for producing an inorganic plate for releasing 1, a plurality of independent air paths 4, 4... Are provided inside the mold 2, and air is blown by blowing air 3 from the air paths 4, 4. It is what.

本発明にあっては、独立した各エア経路４、４…からエア３を吹出してエアブローを行うので、生板１の一部が離型した場合であっても、その離型した部分に対応する部分から全体のエア３が抜けないようにすることができ、生板１の離型していない部分に確実にエアブローを行うことができて離型性を高めることができるものである。   In the present invention, the air 3 is blown out from the independent air paths 4, 4,..., So that even if a part of the green plate 1 is released, it corresponds to the released part. Thus, the entire air 3 can be prevented from escaping from the portion to be released, and the air blow can be reliably performed on the portion of the green plate 1 that has not been released from the mold, so that the releasability can be improved.

以下、本発明を実施するための最良の形態を説明する。   Hereinafter, the best mode for carrying out the present invention will be described.

図２には無機質板を製造するラインの概略説明図を示す。すなわち、押出成形機１０により押し出された生板１は適当なサイズに切断され、トレー１１に載置した状態でプレス成形機２２に運ばれ、プレス成形機２２によりプレス成形されて表面に模様付けがなされ、その後、プレス成形が完了した生板１をトレー１１に載置した状態で多数移動台車１２に積載し、これを養生装置１３に入れて養生することで無機質板を製造するようになっている。   In FIG. 2, the schematic explanatory drawing of the line which manufactures an inorganic board is shown. That is, the green plate 1 extruded by the extrusion molding machine 10 is cut into an appropriate size, and is carried to the press molding machine 22 while being placed on the tray 11, and is press-molded by the press molding machine 22 and patterned on the surface. After that, the raw plate 1 that has been press-formed is loaded on the movable carriage 12 in a state where it is placed on the tray 11, and this is placed in the curing device 13 and cured to produce an inorganic plate. ing.

ここで、本発明に用いる生板の成形材料は、セメントを主原料とし、これに、シリカ、補強繊維、その他の混入物（例えば、増粘剤、軽量化材、粉体等）をブレンドし、これに水を混合したもので、これを押出成形機１０により押出成形し、生板１の状態で上記のようにプレス成形機２２によりプレス成形して表面に模様付けを行うものである。   Here, the green board molding material used in the present invention is mainly made of cement, and is blended with silica, reinforcing fibers, and other contaminants (for example, thickener, lightening material, powder, etc.). This is a mixture of water, which is extruded by the extruder 10 and press-molded by the press-molding machine 22 in the state of the green plate 1 as described above to form a pattern on the surface.

セメントとしては、ポルトランドセメント、高炉セメント、アルミナセメントなど公知のセメントが使用できるものである。また、セメントと混合するシリカ成分としては比表面積の大きい粉末シリカであることが硬化体の靱性向上の面で好ましく、具体的には４０００ｃｍ２／ｇであることが好ましい。また、その含有量としてはセメント１００重量部に対してシリカが２０〜１２０重量部の割合で含有されていることが好ましく、２０重量部未満では得られるセメント硬化体（無機質板）の強度が低下し、１２０重量部を超えると、プレス成形に先立っての押出成形が困難となる。 As the cement, known cements such as Portland cement, blast furnace cement, and alumina cement can be used. The silica component to be mixed with cement is preferably powder silica having a large specific surface area from the viewpoint of improving the toughness of the cured body, and specifically 4000 cm 2 / g. In addition, the content of silica is preferably 20 to 120 parts by weight with respect to 100 parts by weight of cement, and if it is less than 20 parts by weight, the strength of the resulting hardened cement body (inorganic plate) decreases. However, if it exceeds 120 parts by weight, extrusion molding prior to press molding becomes difficult.

本発明に用いる補強繊維としては、Ｌ材、Ｎ材、ラミー、リンターなどのパルプ繊維、ビニロン、ポリプロピレン等が用いられる。この補強繊維の含有量はセメント１００重量部に対して５〜２５重量部が好ましく、５重量部未満ではセメント硬化体の強度が不十分となり、２５重量部を超えると成形が困難となる。なお、本発明においては上記の補強繊維を併用することも可能である。   As reinforcing fibers used in the present invention, pulp fibers such as L material, N material, ramie and linter, vinylon, polypropylene and the like are used. The content of the reinforcing fiber is preferably 5 to 25 parts by weight with respect to 100 parts by weight of the cement, and if it is less than 5 parts by weight, the strength of the hardened cement body becomes insufficient, and if it exceeds 25 parts by weight, molding becomes difficult. In the present invention, the above reinforcing fibers can be used in combination.

本発明においては上記の原料の他にメチルセルロース、エチルセルロース、カルボキシメチルセルロース等の増粘剤や樹脂系の中空体、シラスバルーン、パーライト等の軽量化材、フライアッシュ等の粉体等を必要に応じて含有させることができるものである。そして、上記の材料をドライブレンドして、これにセメント１００重量部に対して１００〜１５０重量部の水を加えて混練機で混練して押出成形機１０により押出し成形を行って生板１を成形することができる。   In the present invention, in addition to the above raw materials, thickeners such as methyl cellulose, ethyl cellulose, carboxymethyl cellulose, resin-based hollow bodies, lightweight materials such as shirasu balloons and pearlite, powders such as fly ash, etc., as necessary It can be contained. Then, the above material is dry blended, 100 to 150 parts by weight of water is added to 100 parts by weight of cement, kneaded by a kneader, and extruded by the extruder 10 to form the green plate 1. Can be molded.

図１に本発明で用いる成形型２を示す。この成形型２は下面が生板１の表面に押し付ける成形面２ａとして形成されており、この成形面２ａには複数個の模様付け用突起２ｂが設けられている。また、成形型２は中空に形成されており、この内部の空間は仕切り板２ｃにより複数の空間に分割されている。そして、仕切り板２ｃにより分割された複数の空間のそれぞれがエア経路４、４として形成されている。図１では、二個のエア経路４を図示するが、これに限らず、三個以上のエア経路４を設けることができる。また、エア経路４、４同士は連通しておらず互いに独立している。   FIG. 1 shows a mold 2 used in the present invention. The lower surface of the molding die 2 is formed as a molding surface 2a that presses against the surface of the green plate 1, and a plurality of patterning projections 2b are provided on the molding surface 2a. Moreover, the shaping | molding die 2 is formed in hollow, The space inside this is divided | segmented into the some space by the partition plate 2c. A plurality of spaces divided by the partition plate 2 c are formed as air paths 4 and 4, respectively. Although two air paths 4 are illustrated in FIG. 1, the present invention is not limited to this, and three or more air paths 4 can be provided. The air paths 4 and 4 are not in communication with each other and are independent of each other.

上記成形型２には複数個のエア吹出し孔２０、２０…が設けられている。エア吹出し孔２０はその上端においてエア経路４と連通して形成されており、エア吹出し孔２０の下端は隣り合う模様付け用突起２ｂ、２ｂの間において成形面２ａに開口している。このエア吹出し孔２０は離型しにくい模様付け用突起２ｂの直近に設けるのが好ましい。また、各エア経路４、４に対応して複数個のエア吹出し孔２０…が設けられている。そして、各エア経路４、４にはそれぞれ個別にエア３が吹き込まれて供給されるように、ポンプ等が成形型２に接続されている。従って、一のエア経路４に供給されたエア３はそのエア経路４に連通するエア吹出し孔２０からのみ吹出し、他のエア吹出し孔２０からは吹出されない。   The molding die 2 is provided with a plurality of air blowing holes 20, 20. The air blowing hole 20 is formed to communicate with the air path 4 at the upper end thereof, and the lower end of the air blowing hole 20 is opened to the molding surface 2a between the adjacent patterning projections 2b and 2b. This air blowing hole 20 is preferably provided in the immediate vicinity of the patterning projection 2b which is difficult to release. A plurality of air blowing holes 20 are provided corresponding to the air paths 4 and 4. A pump or the like is connected to the mold 2 so that the air 3 is blown into the air paths 4 and 4 and supplied individually. Accordingly, the air 3 supplied to one air path 4 is blown out only from the air blowing holes 20 communicating with the air path 4 and is not blown out from the other air blowing holes 20.

このような成形型２は上記プレス成形機２２にセットされて生板１の模様付け成形に用いられる。すなわち、まず、トレー１１に載置した状態で生板１がプレス成形機２２に運ばれてセットされる。次に、プレス成形機２２を作動させて成形型２の成形面２ａを生板１の表面（上面）に押し付けて密着させる。これにより、生板１の表面に模様付け用突起２ｂによる模様付けが行なわれる。ここで、成形面２ａを生板１の表面に押さえ付けているときに、エア経路４にポンプ等を用いて真空引きを行なってもよく、この場合、エア吹出し孔２０を通じて生板１に吸引力を作用させることができ、これにより、成形面２ａに対する生板１の密着性を高めることができて綺麗に模様付けすることができる。   Such a mold 2 is set in the press molding machine 22 and used for patterning the green board 1. That is, first, the raw plate 1 is carried to the press molding machine 22 and set in a state of being placed on the tray 11. Next, the press molding machine 22 is operated so that the molding surface 2a of the mold 2 is pressed against the surface (upper surface) of the green plate 1 to be brought into close contact therewith. Thereby, the patterning by the patterning protrusion 2b is performed on the surface of the green board 1. Here, when the molding surface 2 a is pressed against the surface of the green plate 1, the air path 4 may be evacuated using a pump or the like. In this case, the air is sucked into the green plate 1 through the air blowing holes 20. A force can be applied, whereby the adhesion of the green plate 1 to the molding surface 2a can be enhanced and a beautiful pattern can be formed.

次に、プレス成形機２２による成形型２の生板１に対する押さえ付けを解除して成形面２ａから生板１を離型するが、この時に各エア経路４、４にそれぞれ個別にエア（矢印で示す）３を吹き込んで供給し、このエア３を各エア経路４、４に連通するエア吹出し孔２０の下端開口から吹出してエアブローを行なう。そして、このエアブローによるブロー圧（空気圧）で成形後の生板１が押圧されて成形面２ａから生板１を離型することができるものである。   Next, the pressing of the molding die 2 against the green plate 1 by the press molding machine 22 is released and the green plate 1 is released from the molding surface 2a. At this time, air (arrows) is individually provided in the air paths 4 and 4, respectively. 3 is blown in and supplied, and the air 3 is blown from the lower end opening of the air blowing hole 20 communicating with the air paths 4 and 4 to perform air blowing. And the green board 1 after shaping | molding is pressed by the blow pressure (air pressure) by this air blow, and the green board 1 can be released from the molding surface 2a.

そして、本発明では、独立した複数個のエア経路４、４を有する成形型２を用いて、各エア経路４、４に連通するエア吹出し孔２０からそれぞれ独立してエア３を吹出してエアブローを行なうので、生板１の一部（図１のイの部分）が成形面２ａから離型した場合でも、未だ離型していない生板１の他の一部（図１のロの部分）に対するブロー圧を低下させないようにすることができ、生板１の離型性を高めることができるものである。   And in this invention, using the shaping | molding die 2 which has the several independent air path | routes 4 and 4, the air 3 is blown out independently from the air blowing hole 20 connected to each air path | route 4 and 4, respectively, and an air blow is carried out. Therefore, even when a part of the green plate 1 (part a in FIG. 1) is released from the molding surface 2a, another part of the green plate 1 that has not yet been released (portion b in FIG. 1). Therefore, the release pressure of the green plate 1 can be improved.

本発明の成形型２では、特に、離型しにくい部分毎に分割してエア経路４を設けるのが好ましく、これにより、離型性が確保しにくい部位をエア的に別構造にすることで、確実なエアブローを確保することができて本発明の効果がより発揮されやすくなるものである。   In the molding die 2 of the present invention, it is particularly preferable to provide the air path 4 by dividing it into portions that are difficult to release, thereby making the portion where it is difficult to ensure releasability to have a separate structure in the air. Thus, a reliable air blow can be ensured and the effects of the present invention are more easily exhibited.

本発明は、ＰＣＣ波型瓦や押出外装材などの製造に適用することができ、特に、複雑な模様を成形型２により付与する場合には、離型が不均一に起こりやすいために、好適に用いることができる。   The present invention can be applied to the manufacture of PCC corrugated roof tiles, extruded exterior materials, and the like, and is particularly suitable when a complicated pattern is imparted by the mold 2 because mold release tends to occur unevenly. Can be used.

本発明の実施の形態に用いる成形型の一例を示す断面図である。It is sectional drawing which shows an example of the shaping | molding die used for embodiment of this invention. 同上の本発明の全体を示す概略図である。It is the schematic which shows the whole this invention same as the above. （ａ）は従来例を示す断面図、（ｂ）は従来例の問題点を示す断面図である。(A) is sectional drawing which shows a prior art example, (b) is sectional drawing which shows the problem of a prior art example.

符号の説明Explanation of symbols

１ 生板
２ 成形型
３ エア
４ エア経路 1 Raw plate 2 Mold 3 Air 4 Air path

Claims (1)

セメント系の生板の表面に成形型を押し付けて模様付けを行なった後、成形型から生板にエアブローを行ないながら成形型から生板を離型する無機質板の製造方法において、成形型の内部に複数の独立したエア経路を設け、各エア経路からエアを吹出してエアブローを行うことを特徴とする無機質板の製造方法。
In the manufacturing method of the inorganic board, after pressing the mold against the surface of the cement-based green board and patterning, the green board is released from the mold while air blowing from the mold to the green board. A method for producing an inorganic board, comprising: providing a plurality of independent air paths, and blowing air from each air path to perform air blowing.
JP2004248967A 2004-08-27 2004-08-27 Manufacturing method of inorganic board Expired - Fee Related JP4594678B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008001533A (en) * 2006-06-20 2008-01-10 Shimizu Corp Method for suppressing evolution of ammonia from mortar/concrete and mortar/concrete member

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