JPH0788824A - Manufacture of permanent form and form used therefor and foaming sheet - Google Patents
Manufacture of permanent form and form used therefor and foaming sheetInfo
- Publication number
- JPH0788824A JPH0788824A JP23635793A JP23635793A JPH0788824A JP H0788824 A JPH0788824 A JP H0788824A JP 23635793 A JP23635793 A JP 23635793A JP 23635793 A JP23635793 A JP 23635793A JP H0788824 A JPH0788824 A JP H0788824A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- foamed
- permanent
- sheet
- concrete
- 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.)
- Granted
Links
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は永久型枠の製造方法及び
これに使用する型枠及び発泡シートに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a permanent mold, a mold used for the method and a foam sheet.
【０００２】[0002]
【従来の技術】一般に、断面Ｕ字形の薄肉状の永久型枠
を製造する場合は、内型枠の内面に凹凸状のプラスチッ
クフィルムを貼り付けた型枠を形成し、この型枠の中に
コンクリートを打設し、このコンクリートが硬化した後
に脱型することにより内面に無数の凹凸を備えた型枠を
製造していた。2. Description of the Related Art Generally, when manufacturing a thin-walled permanent mold having a U-shaped cross section, a mold having an uneven plastic film attached to the inner surface of the inner mold is formed, and the mold is formed in the mold. By casting concrete, and after the concrete has hardened, the concrete is removed from the mold to manufacture a mold having innumerable irregularities on the inner surface.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記の永久型
枠は薄肉型枠とするために外型枠と内型枠との間隔を狭
くしていた。このため型枠内にコンクリートが充填しに
くくなって製造に手間がかかるという問題があった。さ
らに、成形品にジャンカ等が発生して表面の成形状態が
非常に悪いという問題もあった。本発明はこのような問
題に鑑みてなされたものであり、その目的は、永久型枠
が容易に製造でき、しかもジャンカ等の発生が防止でき
る永久型枠の製造方法及びこれに使用する型枠及び発泡
シートを提供することである。However, in the above-mentioned permanent mold, the space between the outer mold and the inner mold is narrowed in order to make it a thin mold. For this reason, there is a problem that it is difficult to fill the concrete in the formwork and it takes time to manufacture. Further, there is a problem that a molded product has junkers or the like and the surface is in a very bad condition. The present invention has been made in view of the above problems, and an object thereof is a method for manufacturing a permanent mold which can easily manufacture a permanent mold and can prevent the occurrence of junkers and the like, and a mold used therefor. And to provide a foamed sheet.
【０００４】[0004]
【課題を解決するための手段】以上の課題を達成するた
めの本発明の永久型枠の製造方法の要旨は、発泡剤が充
填された無数の発泡部を備えた発泡シートを内面に貼着
した型枠内にコンクリートを打設し、該打設コンクリー
ト中の水溶液により前記発泡剤を発泡せしめて発泡部を
膨張させて無数の凹凸を形成し、該コンクリートが硬化
した後に脱型することに存し、前記発泡剤がアルミニウ
ム粉末、炭酸水素ナトリウム、五酸化リン、ふっ化水素
のうちの少なくとも１つであり、また永久型枠の製造方
法に使用する型枠の要旨は、無数の発泡部を備えた発泡
シートが型枠本体の内面に貼着され、前記発泡部はその
中に液体と反応して発泡する発泡剤が充填され、その表
面には給水孔が設けられたことに存し、前記発泡剤がア
ルミニウム粉末、炭酸水素ナトリウム、五酸化リン、ふ
っ化水素のうちの少なくとも１つであり、また永久型枠
の製造方法に使用する発泡シートの要旨は、無数の発泡
部の中には液体と反応して発泡する発泡剤が充填され、
前記発泡部の表面には給水孔が設けられたことに存し、
前記発泡剤がアルミニウム粉末、炭酸水素ナトリウム、
五酸化リン、ふっ化水素のうちの少なくとも１つである
ことに存する。The gist of the method for producing a permanent mold form of the present invention for achieving the above object is to attach a foamed sheet having innumerable foamed parts filled with a foaming agent to the inner surface. The concrete is cast in the formed mold, the foaming agent is foamed by the aqueous solution in the cast concrete to expand the foamed part to form innumerable irregularities, and the concrete is cured and then released from the mold. The foaming agent is at least one of aluminum powder, sodium hydrogen carbonate, phosphorus pentoxide, and hydrogen fluoride, and the gist of the mold used in the method for producing the permanent mold is the innumerable foaming part. The foamed sheet having the above is attached to the inner surface of the mold body, and the foamed portion is filled with a foaming agent that reacts with a liquid to foam, and the surface thereof is provided with a water supply hole. , The foaming agent is aluminum powder, At least one of sodium hydrogen oxyphosphate, phosphorus pentoxide, and hydrogen fluoride. The gist of the foam sheet used in the method for manufacturing the permanent mold is that innumerable foam parts react with liquid and foam. Is filled with a foaming agent to
There is a water supply hole on the surface of the foam part,
The foaming agent is aluminum powder, sodium hydrogen carbonate,
It is at least one of phosphorus pentoxide and hydrogen fluoride.
【０００５】[0005]
【作用】型枠の内面に貼着された発泡シートはコンクリ
ートの打設前は、発泡剤が未発泡であるため通常の平滑
なシートとして型枠の内面に貼り付けられるが、型枠内
にコンクリートが打設されると、そのコンクリート中の
水溶液により前記発泡剤が発泡して発泡部を膨張させ
る。そして、前記コンクリートが硬化した後に脱型する
と前記膨張した無数の発泡部により永久型枠の内面に多
数の凹凸が形成される。また型枠の内面に貼着された発
泡シートは、コンクリートの打設前には通常の平滑なシ
ートであるため、型枠内へのコンクリートの充填が容易
にできてジャンカ等の発生も防止できる。[Function] The foam sheet adhered to the inner surface of the mold is attached to the inner surface of the mold as a normal smooth sheet because the foaming agent is unfoamed before the concrete is poured. When concrete is poured, the foaming agent foams due to the aqueous solution in the concrete and expands the foaming part. When the concrete is hardened and then released from the mold, a large number of irregularities are formed on the inner surface of the permanent mold by the expanded innumerable foamed portions. In addition, since the foam sheet attached to the inner surface of the mold is a normal smooth sheet before placing concrete, it is easy to fill the mold with concrete and prevent the occurrence of junkers. .
【０００６】[0006]
【実施例】以下、本発明における永久型枠の製造方法の
一実施例を図面に基づいて詳細に説明する。図１は本発
明の永久型枠の製造方法に使用する型枠の断面図、図２
は発泡シートの平面図、図３は同断面図である。永久型
枠を製造するための型枠１は、内型枠１ａと外型枠１ｂ
とによりなるＵ字形の型枠であり、前記内型枠１ａの内
面に発泡シート２が接着剤又は両面テープ等で貼着され
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a permanent mold according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view of a mold used in the method for manufacturing a permanent mold of the present invention, FIG.
FIG. 3 is a plan view of the foamed sheet, and FIG. 3 is a sectional view of the same. A formwork 1 for manufacturing a permanent formwork comprises an inner formwork 1a and an outer formwork 1b.
And a foam sheet 2 is attached to the inner surface of the inner frame 1a with an adhesive or a double-sided tape.
【０００７】この発泡シート２はフラットシート２ａと
膨張可能な発泡部３を無数備えた膨張シート２ｂとが貼
り合わされて形成され、前記発泡部３の中にはアルカリ
水溶液に反応して発泡するアルミニウム粉末等の発泡剤
４が充填されている。またこの発泡部３には前記発泡剤
４は漏れないが水溶液は通す程度の給水孔３ａが設けら
れ、この給水孔３ａからのアルカリ水溶液によりアルミ
ニウム粉末が反応して発泡する。The foamed sheet 2 is formed by laminating a flat sheet 2a and an expanded sheet 2b having a large number of expandable foamed portions 3 on each other. In the foamed portion 3, aluminum foamed in response to an alkaline aqueous solution is formed. It is filled with a foaming agent 4 such as powder. In addition, the foaming portion 3 is provided with a water supply hole 3a through which the foaming agent 4 does not leak but through which an aqueous solution can pass, and the aluminum powder reacts and foams by the alkaline aqueous solution from the water supply hole 3a.
【０００８】したがって、この発泡シート２はアルミニ
ウム粉末が発泡する前は、表面がほぼ平滑なシートであ
る。また前記の発泡剤４はアルミニウム粉末の他に、水
と反応して発泡する炭酸水素ナトリウム、五酸化リン、
ふっ化水素等を使用し、さらにこれらに限定されず液体
に反応して発泡する発泡剤であればその他の発泡剤も使
用できる。Therefore, the foamed sheet 2 has a substantially smooth surface before the aluminum powder is foamed. In addition to the aluminum powder, the foaming agent 4 includes sodium hydrogen carbonate, phosphorus pentoxide, which reacts with water to foam.
It is possible to use hydrogen fluoride and the like, and it is not limited to these, and other foaming agents can be used as long as they are foaming agents that react with a liquid to foam.
【０００９】つぎに上記型枠１を使用したＵ字形の薄肉
状の永久型枠の製造方法について説明する。まず初め
に、図４に示すように、内面に発泡シート２を接着剤又
は両面テープで貼り付けた内型枠１ａと外型枠１ｂとに
よりなるＵ字形の型枠１を作る。この発泡シート２は発
泡部３が未発泡のときは図３の（１）に示すように、表
面がほぼ平滑となるため、内型枠１ａに貼り付けたとし
ても通常の型枠１と何等変わりがない。したがって、例
え内型枠１ａと外型枠１ｂとの間隔を狭くしたとしても
コンクリートの打設を容易に行える。Next, a method for manufacturing a U-shaped thin-walled permanent mold using the mold 1 will be described. First, as shown in FIG. 4, a U-shaped mold 1 including an inner mold 1a and an outer mold 1b, in which a foam sheet 2 is attached to the inner surface with an adhesive or a double-sided tape, is produced. When the foamed portion 3 is not foamed, the foamed sheet 2 has a substantially smooth surface as shown in (1) of FIG. 3. Therefore, even if the foamed sheet 2 is attached to the inner mold 1a, it has nothing to do with the normal mold 1. There is no change. Therefore, even if the space between the inner mold 1a and the outer mold 1b is narrowed, concrete can be easily placed.
【００１０】次に、図５に示すように、上記の型枠１内
にコンクリート５を打設し、その打設後所定時間経過す
ると、そのコンクリート５中のアルカリ水溶液が給水孔
３ａから発泡部３内へ染み込んでアルミニウム粉末を発
泡させて発泡シート２の表面に凹凸６を形成する。Next, as shown in FIG. 5, when concrete 5 is placed in the form 1 and a predetermined time has elapsed after the placement, the alkaline aqueous solution in the concrete 5 is supplied from the water supply hole 3a to the foamed portion. 3 is impregnated into the aluminum sheet and the aluminum powder is foamed to form irregularities 6 on the surface of the foamed sheet 2.
【００１１】次に、前記コンクリート５が硬化してから
脱型すると、図６に示すように、内面に凹凸６が形成さ
れた永久型枠７が製造できる。また前記発泡シート２は
内型枠１ａに貼り付けられているので脱型の際に内型枠
１ａとともにコンクリート５の内面から剥離することが
できる。Next, when the concrete 5 is hardened and then released from the mold, a permanent form 7 having an uneven surface 6 on its inner surface can be manufactured as shown in FIG. Further, since the foam sheet 2 is attached to the inner mold 1a, it can be separated from the inner surface of the concrete 5 together with the inner mold 1a at the time of releasing the mold.
【００１２】尚、以上の永久型枠７の製造方法はＵ字形
の型枠１を用いて説明したが、これはＵ字形に限定され
るものではなく、この製造方法によりＬ字形やその他の
形状の型枠も製造することができ、さらに外壁用ＰＣ版
も上記方法により製造することができる。Although the manufacturing method of the permanent mold 7 has been described using the U-shaped mold 1, this is not limited to the U-shape, and the L-shaped or other shapes can be formed by this manufacturing method. Can be manufactured, and the PC plate for outer wall can also be manufactured by the above method.
【００１３】図７は、上記方法により製造した永久型枠
内にコンクリートを打設し、その経過日数に伴う永久型
枠とコンクリートとの付着強度を確認した実験結果であ
る。これによると、本発明の凹凸を設けた永久型枠は、
凹凸を設けない永久型枠に対して付着強度が１．５倍大
きくなることがわかった。FIG. 7 shows the results of an experiment in which concrete was placed in the permanent mold manufactured by the above method, and the adhesion strength between the permanent mold and the concrete was confirmed as the number of days elapsed. According to this, the permanent formwork provided with the unevenness of the present invention,
It was found that the adhesion strength was 1.5 times higher than that of the permanent mold having no unevenness.
【００１４】[0014]
【発明の効果】型枠の内面に貼着した発泡シートは、コ
ンクリートの打設前はほぼ平滑なシートであるが、型枠
にコンクリートを打設すると、そのコンクリート中の水
溶液によって発泡部中の発泡剤が発泡して発泡部を膨張
させるので、型枠へのコンクリートの打設が容易にでき
て永久型枠を容易に製造できるとともに、ジャンカ等の
発生を防止することができる。The foamed sheet adhered to the inner surface of the mold is a substantially smooth sheet before the concrete is poured, but when concrete is poured into the mold, the aqueous solution in the concrete causes the foamed part in the foamed part Since the foaming agent foams and expands the foamed portion, concrete can be easily placed on the mold, a permanent mold can be easily manufactured, and junkers and the like can be prevented.
【００１５】型枠の内面に貼着された発泡シートはコン
クリートの打設前は、発泡剤が未発泡であるため通常の
平滑なシートと同じように型枠の内面に貼り付けること
ができ、例えば、Ｕ字形の薄肉状の永久型枠を製造する
場合は内型枠と外型枠との間隔を十分に確保することが
できる。The foamed sheet adhered to the inner surface of the mold can be adhered to the inner surface of the mold in the same manner as a normal smooth sheet because the foaming agent is unfoamed before concrete is poured, For example, when manufacturing a U-shaped thin-walled permanent mold, it is possible to secure a sufficient distance between the inner mold and the outer mold.
【００１６】型枠内にコンクリートが打設されると、そ
のコンクリート中の水溶液により発泡シートの発泡部を
膨張させるので、永久型枠の内面に容易に凹凸を形成す
ることができる。When concrete is poured into the mold, the foamed portion of the foamed sheet is expanded by the aqueous solution in the concrete, so that irregularities can be easily formed on the inner surface of the permanent mold.
【図１】発泡部が膨張した発泡シートを貼着した型枠の
断面図である。FIG. 1 is a cross-sectional view of a mold to which a foamed sheet having a foamed portion expanded is attached.
【図２】発泡シートの平面図である。FIG. 2 is a plan view of a foam sheet.
【図３】（１）は発泡部が未発泡の発泡シートの断面
図、（２）は発泡部が膨張した発泡シートの断面図であ
る。FIG. 3A is a cross-sectional view of a foamed sheet in which a foamed portion is not foamed, and FIG. 3B is a cross-sectional view of a foamed sheet in which a foamed portion is expanded.
【図４】発泡部が膨張する前の発泡シートを貼着した型
枠の断面図である。FIG. 4 is a cross-sectional view of a mold to which a foamed sheet is attached before the foamed portion expands.
【図５】コンクリートを打設して発泡部を膨張せしめた
型枠の断面図である。FIG. 5 is a cross-sectional view of a mold in which concrete is poured to expand the foamed portion.
【図６】脱型した永久型枠の断面図である。FIG. 6 is a cross-sectional view of the removed permanent mold.
【図７】永久型枠とその中に打設したコンクリートとの
付着強度を示したグラフ図である。FIG. 7 is a graph showing the adhesion strength between a permanent formwork and concrete cast therein.
１ 型枠 ２ 発泡シート ３ 発泡部 ４ 発泡剤 ５ コンクリート ６ 凹凸 ７ 永久型枠 1 Formwork 2 Foaming Sheet 3 Foaming Part 4 Foaming Agent 5 Concrete 6 Irregularity 7 Permanent Formwork
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 105:04 (72)発明者 古田島 清彦 東京都中央区京橋１−７−１ 戸田建設株 式会社内 (72)発明者 望月 重美 東京都中央区京橋１−７−１ 戸田建設株 式会社内 (72)発明者 徳永 優 東京都中央区京橋１−７−１ 戸田建設株 式会社内 (72)発明者 倉林 清 東京都中央区京橋１−７−１ 戸田建設株 式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Internal reference number FI technical display location // B29K 105: 04 (72) Inventor Kiyohiko Furutajima 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Stock company (72) Inventor Shigemi Mochizuki 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Yu Tokunaga 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Kiyoshi Kurabayashi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.
Claims (4)
た発泡シートを内面に貼着した型枠内にコンクリートを
打設し、該打設コンクリート中の水溶液により前記発泡
剤を発泡せしめて発泡部を膨張させて無数の凹凸を形成
し、該コンクリートが硬化した後に脱型することを特徴
とする永久型枠の製造方法。1. A concrete is poured into a mold having a foamed sheet having an infinite number of foamed parts filled with a foaming agent attached to an inner surface thereof, and the foaming agent is foamed by an aqueous solution in the poured concrete. A method for producing a permanent mold, wherein the foamed part is expanded to form innumerable irregularities, and the concrete is hardened and then released from the mold.
本体の内面に貼着され、前記発泡部はその中に液体と反
応して発泡する発泡剤が充填され、その表面には給水孔
が設けられたことを特徴とする永久型枠の製造方法に使
用する型枠。2. A foamed sheet having innumerable foamed parts is attached to an inner surface of a mold body, and the foamed part is filled with a foaming agent which reacts with a liquid to foam, and the surface thereof is supplied with water. A formwork used in a method for producing a permanent formwork, which is provided with holes.
泡する発泡剤が充填され、前記発泡部の表面には給水孔
が設けられたことを特徴とする永久型枠の製造方法に使
用する発泡シート。3. A method for producing a permanent mold, wherein a myriad of foamed parts are filled with a foaming agent that reacts with a liquid to foam, and water holes are provided on the surface of the foamed parts. Foamed sheet used for.
素ナトリウム、五酸化リン、ふっ化水素のうちの少なく
とも１つであることを特徴とする請求項１又は２又は３
に記載の永久型枠の製造方法及びこれに使用する型枠及
び発泡シート。4. The foaming agent is at least one of aluminum powder, sodium hydrogen carbonate, phosphorus pentoxide, and hydrogen fluoride.
The method for producing a permanent mold as described in 1., and a mold and a foam sheet used for the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23635793A JP2616878B2 (en) | 1993-09-22 | 1993-09-22 | Method for producing permanent formwork, formwork used therefor, and foam sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23635793A JP2616878B2 (en) | 1993-09-22 | 1993-09-22 | Method for producing permanent formwork, formwork used therefor, and foam sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0788824A true JPH0788824A (en) | 1995-04-04 |
| JP2616878B2 JP2616878B2 (en) | 1997-06-04 |
Family
ID=16999607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23635793A Expired - Fee Related JP2616878B2 (en) | 1993-09-22 | 1993-09-22 | Method for producing permanent formwork, formwork used therefor, and foam sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616878B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1171994A (en) * | 1997-08-27 | 1999-03-16 | Ishikawajima Constr Materials Co Ltd | Segment and form for manufacturing segment |
| JP2013256022A (en) * | 2012-06-11 | 2013-12-26 | Kyocera Communication Systems Co Ltd | Outer frame member |
| JP2018172917A (en) * | 2017-03-31 | 2018-11-08 | 住友大阪セメント株式会社 | Concrete pavement construction method |
-
1993
- 1993-09-22 JP JP23635793A patent/JP2616878B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1171994A (en) * | 1997-08-27 | 1999-03-16 | Ishikawajima Constr Materials Co Ltd | Segment and form for manufacturing segment |
| JP2013256022A (en) * | 2012-06-11 | 2013-12-26 | Kyocera Communication Systems Co Ltd | Outer frame member |
| JP2018172917A (en) * | 2017-03-31 | 2018-11-08 | 住友大阪セメント株式会社 | Concrete pavement construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616878B2 (en) | 1997-06-04 |
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