JPH0417772B2 - - Google Patents
Info
- Publication number
- JPH0417772B2 JPH0417772B2 JP7674487A JP7674487A JPH0417772B2 JP H0417772 B2 JPH0417772 B2 JP H0417772B2 JP 7674487 A JP7674487 A JP 7674487A JP 7674487 A JP7674487 A JP 7674487A JP H0417772 B2 JPH0417772 B2 JP H0417772B2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- gypsum
- slurry
- lightweight
- hardened
- 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
Links
- 239000010440 gypsum Substances 0.000 claims description 73
- 229910052602 gypsum Inorganic materials 0.000 claims description 73
- 239000002002 slurry Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 17
- 230000001413 cellular effect Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000010030 laminating Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 18
- 239000000047 product Substances 0.000 description 12
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000000835 fiber Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000009970 fire resistant effect Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 229920000609 methyl cellulose Polymers 0.000 description 4
- 239000001923 methylcellulose Substances 0.000 description 4
- 235000010981 methylcellulose Nutrition 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000012783 reinforcing fiber Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 150000004683 dihydrates Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- -1 sodium alkyl sulfate Chemical class 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920005613 synthetic organic polymer Polymers 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Producing Shaped Articles From Materials (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は軽量石膏硬化体の製造方法及び製造装
置に係り、特に鉄骨耐火被覆材、耐火間仕切材等
に使用するに好適な軽量石膏硬化体を効率的に製
造することができる方法及び装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and apparatus for producing a lightweight hardened gypsum body, and in particular, a lightweight hardened gypsum body suitable for use in fireproof coating materials for steel frames, fireproof partition materials, etc. The present invention relates to a method and apparatus capable of efficiently manufacturing.
［従来の技術］
気泡を多量に含む石膏スラリーを硬化させて製
造される軽量石膏硬化体（多泡質石膏板）は、そ
の軽量性と共に、石膏（二水石膏）の特徴である
不燃性、100℃以上に加熱されたときの結晶水の
脱水による吸熱反応、並びに硬化体内に含有され
る多量の気泡による断熱作用等の優れた耐火特性
から、鉄骨耐火被覆材、耐火間仕切材等の建材等
として従来より広く用いられている。[Prior Art] A lightweight hardened gypsum body (multicellular gypsum board) manufactured by curing a gypsum slurry containing a large amount of air bubbles is not only lightweight but also has the characteristics of nonflammability and gypsum dihydrate. Due to its excellent fire-resistant properties, such as the endothermic reaction caused by dehydration of crystalline water when heated to 100℃ or higher, and the heat insulation effect due to the large amount of air bubbles contained within the hardened body, it is used in building materials such as fire-resistant coatings for steel frames and fire-resistant partition materials. It has been widely used as.
この種の硬化体を連続的に製造する方法として
は、例えば特開昭57−144749号が提案されてい
る。この方法では石膏スラリー及び気泡石膏スラ
リーをベルトコンベヤの上に流すことを可能にす
るため、つまり型枠の役目を果させるために、外
周部に厚紙を配している。外周部の厚紙は、ま
た、軽量石膏硬化体が多量の気泡を含有している
ことに起因した、表面が脆くて取扱い難く、表面
が平滑となり難いなどの欠点を解消し、硬化体の
表面の平滑さを出すためにも不可欠である。 As a method for continuously producing this type of cured product, for example, Japanese Patent Application Laid-Open No. 144749/1983 has been proposed. In this method, cardboard is placed around the outer periphery to allow the gypsum slurry and aerated gypsum slurry to flow onto a belt conveyor, that is, to serve as a formwork. The cardboard on the outer periphery also eliminates disadvantages such as the surface being brittle and difficult to handle, and the surface being difficult to smooth, which is caused by the lightweight hardened gypsum containing a large amount of air bubbles, and improves the surface of the hardened gypsum. It is also essential for achieving smoothness.
［発明が解決しようとする問題点］
しかしながら、火炎時の耐火材としての軽量石
膏硬化体の使用目的からは、紙、布のような可熱
性ないし発煙性の物質を用いることは耐火材とし
ての特性を阻害することになる。[Problems to be Solved by the Invention] However, considering the purpose of using the lightweight hardened gypsum as a fireproof material in the event of a fire, using heat-generating or smoke-emitting substances such as paper or cloth is not suitable as a fireproof material. This will impede the characteristics.
［問題点を解決するための手段］
本発明はこのような従来の多泡質軽量石膏硬化
体の問題点を解決し、表面が平滑で固く、かつ高
い曲げ強度を有し、しかも、可燃性ないし発煙性
の材料を使用することなく、耐火材としての十分
な不燃性を備える軽量石膏硬化体を連続的かつ効
率的に製造する方法及び装置を提供するものであ
る。[Means for Solving the Problems] The present invention solves the problems of the conventional multicellular lightweight gypsum hardened body. The present invention provides a method and an apparatus for continuously and efficiently manufacturing a lightweight hardened gypsum body having sufficient noncombustibility as a fireproof material without using smoke-emitting materials.
本発明の軽量石膏硬化体の製造方法は、両側辺
に波板状のレツジを有し、水平に設置されたボデ
イベルトと、このボデイベルトの側辺に配置さ
れ、該レツジの内側に沿つて送行されるサイドベ
ルトと、ボデイベルトの上側に水平に設置された
ならしベルトと、を備えた装置を用い、ボデイベ
ルト、サイドベルト及びならしベルトを同期駆動
させ、緻密質石膏スラリー、気泡石膏スラリー及
び緻密質石膏スラリーをボデイベルト上に順次に
供給して積層するものである。 The method for producing a lightweight hardened gypsum body of the present invention includes a body belt that has corrugated ledges on both sides and is installed horizontally, and a body belt that is placed on the side of this body belt and runs along the inside of the ledges. Using a device equipped with a conveying side belt and a leveling belt installed horizontally above the body belt, the body belt, side belt, and leveling belt are driven synchronously, and dense gypsum slurry, cellular gypsum slurry, etc. Slurry and dense gypsum slurry are sequentially supplied and laminated onto a body belt.
また、本発明の軽量石膏硬化体の製造装置は、
両側辺に波板状のレツジを有し、水平に設置され
たボデイベルトと、このボデイベルトの側辺に配
置され、該レツジの内側に沿つて送行されるサイ
ドベルトと、ボデイベルトの上側に水平に設置さ
れたならしベルトと、これらボデイベルト、サイ
ドベルト及びならしベルトを同期駆動させる駆動
装置とを備えてなるものである。 Furthermore, the apparatus for producing a lightweight gypsum hardened body of the present invention includes:
A body belt that has corrugated ledges on both sides and is installed horizontally; a side belt that is placed on the side of this body belt and runs along the inside of the ledge; It is equipped with a leveling belt installed horizontally, and a drive device that drives the body belt, side belt, and leveling belt synchronously.
以下、本発明を図面を参照して詳細に説明す
る。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図〜第４図は本発明方法の実施に好適な製
造装置の実施例を説明する図であつて、第１図は
側断面図、第２図は平面図（ただし、第２図にお
いて、ならしベルトは図示されていない。）、第３
図は第２図の−線に沿う断面図、第４図は第
２図の部の拡大断面斜視図（なお、第４図にお
いて、石膏硬化体は図示されていない。）である。 1 to 4 are views explaining an embodiment of a manufacturing apparatus suitable for carrying out the method of the present invention, in which FIG. 1 is a side sectional view and FIG. 2 is a plan view (however, in FIG. , leveling belt not shown), third
The figure is a sectional view taken along the - line in FIG. 2, and FIG. 4 is an enlarged sectional perspective view of the portion shown in FIG. 2 (note that the hardened gypsum body is not shown in FIG. 4).
図示の如く、本実施例装置は、水平に設置され
たボデイベルト１及びならしベルト２を有し、こ
のうち、ボデイベルト１には、その両側辺に波板
状のレツジ３が形成されている。ボデイベルト１
の両側辺部には、このレツジ３の内側に沿つて送
行されるサイドベルト４，４が設置されている。
図中、１１はボデイベルト１の駆動用ローラ、１
２はならしベルト２の駆動用ローラ、１４はサイ
ドベルト４の駆動用ローラである。 As shown in the figure, the device of this embodiment has a body belt 1 and a leveling belt 2 installed horizontally. Of these, the body belt 1 has corrugated ledges 3 formed on both sides thereof. There is. body belt 1
Side belts 4, 4, which are fed along the inside of the cash register 3, are installed on both sides of the cash register 3.
In the figure, 11 is a driving roller for the body belt 1;
2 is a driving roller for the leveling belt 2, and 14 is a driving roller for the side belt 4.
これらローラ１１，１２，１４には可変速機付
モータなどの駆動装置（図示略）が連設されてお
り、ボデイベルト１、ならしベルト２及びサイド
ベルト４，４は同期駆動即ち同一速度で同方向に
走行可能とされている。なお、上記駆動装置は、
各ローラ１１，１２，１４にそれぞれ別個に設け
ても良く、また共通の駆動源からチエーン、タイ
ミングベルトなど適宜の動力伝達手段によつてロ
ーラ１１，１２，１４へ駆動力を伝達するもので
あつても良い。 A driving device (not shown) such as a variable speed motor is connected to these rollers 11, 12, 14, and the body belt 1, leveling belt 2, and side belts 4, 4 are driven synchronously, that is, at the same speed. It is possible to travel in the same direction. In addition, the above drive device is
It may be provided separately for each roller 11, 12, 14, or the driving force may be transmitted from a common drive source to the rollers 11, 12, 14 by an appropriate power transmission means such as a chain or a timing belt. It's okay.
次にこのような装置を用い、本発明の方法に従
つて軽量石膏硬化体を製造する方法について説明
する。 Next, a method for producing a lightweight hardened gypsum body using such an apparatus according to the method of the present invention will be described.
まず、図示の装置のボデイベルト１、ならしベ
ルト２及びサイドベルト４，４を同一速度で駆動
させ、ボデイベルト１及びサイドベルト４，４で
形成された凹部に、供給装置２１より緻密質石膏
スラリーＡを、供給装置２２より気泡石膏スラリ
ーＢを、更に供給装置２３より緻密質石膏スラリ
ーＡを順次供給積層し、その上をならしベルト２
で覆う。 First, the body belt 1, the leveling belt 2, and the side belts 4, 4 of the illustrated apparatus are driven at the same speed, and the supply device 21 supplies dense gypsum to the recess formed by the body belt 1 and the side belts 4, 4. Slurry A, aerated gypsum slurry B from the supply device 22, and dense gypsum slurry A from the supply device 23 are sequentially supplied and laminated, and the leveling belt 2
cover with
緻密質石膏スラリーＡ、発泡石膏スラリーＢ
は、ボデイベルト１及びサイドベルト４，４で形
成される凹部中で、ならしベルト２でならされつ
つ移動する。そして、この移動を行なつている間
に表層の緻密質石膏層１０ａ及び内部の気泡石膏
層１０ｂは硬化して一体となり、軽量石膏硬化体
１０が製造される。従つて、上部のならしベルト
２は供給された原料の石膏スラリーが型枠を必要
としない程度の強度に達するまでの長さが必要で
ある。この硬化体は、次いで、適当な長さに切断
された後乾燥工程で乾燥されて製品とされる。 Dense gypsum slurry A, foamed gypsum slurry B
moves in the recess formed by the body belt 1 and the side belts 4, 4 while being leveled by the leveling belt 2. During this movement, the dense gypsum layer 10a on the surface and the cellular gypsum layer 10b on the inside harden and become integrated, and the lightweight hardened gypsum body 10 is manufactured. Therefore, the upper leveling belt 2 needs to be long enough to allow the supplied raw material gypsum slurry to reach a strength that does not require molds. This cured product is then cut into appropriate lengths and dried in a drying process to produce a product.
なお、図示のような装置においてボデイベルト
１、ならしベルト２、サイドベルト４，４の表面
はそのままの状態でも、硬化体を離型性よく製造
を行なうことができるが、これらのベルト表面は
フツ素樹脂等でコーテイングして用いることによ
り硬化体の付着をより確実に防止でき、極めて有
利である。 In addition, in the apparatus shown in the figure, it is possible to manufacture a cured product with good mold releasability even if the surfaces of the body belt 1, leveling belt 2, and side belts 4, 4 are left as they are, but the surfaces of these belts are By coating with a fluororesin or the like, adhesion of the cured product can be more reliably prevented, which is extremely advantageous.
本発明で使用するに好適なボデイベルトとして
は、バンドー化学社製フレクスベルコンベアベル
トが挙げられる。また、サイドベルトとしては、
同社製サンラインベルトが好適である。 As a body belt suitable for use in the present invention, a flexible belt conveyor belt manufactured by Bando Kagaku Co., Ltd. can be mentioned. In addition, as a side belt,
The company's Sunline belt is suitable.
次に本発明の軽量石膏硬化体の製造原料につい
て説明する。 Next, raw materials for producing the lightweight hardened gypsum body of the present invention will be explained.
硬化体の外表面を形成する緻密質石膏用スラリ
ーは、例えば、半水石膏と水又は半水石膏と水及
び補強繊維を主体とするペーストに、必要に応じ
て凝結遅延剤及び増粘剤を加えて調製される。 The slurry for dense gypsum that forms the outer surface of the hardened body is, for example, a paste mainly consisting of gypsum hemihydrate and water, or gypsum hemihydrate, water, and reinforcing fibers, with setting retarders and thickeners added as necessary. In addition, it is prepared.
緻密質石膏スラリーに使用する凝結遅延剤とし
ては、オキシカルボン酸及びその塩類、グルコン
酸及びその塩類、リン酸及びその塩類、アミノ
酸、糖類など公知のものでよく、その添加率は半
水石膏に対して0.01〜5.0重量％が好ましい。ま
た、増粘剤としてはポリビニルアルコール、メチ
ルセルロース等を用いることができ、その添加率
は半水石膏に対して0.1〜3.0重量％が好ましい。 As the setting retarder used in the dense gypsum slurry, known ones such as oxycarboxylic acid and its salts, gluconic acid and its salts, phosphoric acid and its salts, amino acids, and saccharides may be used, and the addition rate thereof is determined based on the hemihydrate gypsum slurry. It is preferably 0.01 to 5.0% by weight. Moreover, polyvinyl alcohol, methylcellulose, etc. can be used as a thickener, and the addition rate thereof is preferably 0.1 to 3.0% by weight based on gypsum hemihydrate.
内部の気泡石膏層用スラリーは、半水石膏と水
又は半水石膏と水及び補強繊維を主体とするスラ
リーに、界面活性剤や必要に応じて増粘剤を加え
て混練し多量の気泡を導入して硬化させたもので
ある。この場合、気泡の導入方法は、プレフオー
ム法又はミツクスフオーム法のいずれによつても
良い。プレフオーム法は、まず、水にアルキル硫
酸ソーダ、アルキルベンゼンスルホン酸ソーダ、
ポリオキシエチレンアルキルル硫酸塩等の公知の
起泡剤を半水石膏に対し、0.02〜2.0重量％添加
し、強力に撹拌して発泡させる。この際にPVA
（ポリビニルアルコール）、MC（メチルセルロー
ズ）などの高分子物質の増粘剤を半水石膏に対
し、0.05〜3.0重量％添加すると、安定した気泡
ができる。この発泡水と半水石膏とを混合してス
ラリーとする。ミツクスフオーム法は、同様な配
合で材料を同時に投入し、強力に撹拌してスラリ
ーとする。いずれの気泡導入法をとる場合でも、
水の量は半水石膏に対し40〜100重量％が好適で
ある。 The slurry for the internal cellular gypsum layer is made by mixing a slurry mainly consisting of gypsum hemihydrate and water or gypsum hemihydrate, water, and reinforcing fibers, adding a surfactant and, if necessary, a thickening agent, to form a large amount of bubbles. It was introduced and cured. In this case, the bubble introduction method may be either a preform method or a mix foam method. In the preform method, first, add sodium alkyl sulfate, sodium alkyl benzene sulfonate,
A known foaming agent such as polyoxyethylene alkyl sulfate is added to gypsum hemihydrate in an amount of 0.02 to 2.0% by weight, and the mixture is vigorously stirred to foam. At this time, PVA
When 0.05 to 3.0% by weight of a polymeric thickener such as (polyvinyl alcohol) or MC (methyl cellulose) is added to hemihydrate gypsum, stable bubbles can be created. This foamed water and hemihydrate gypsum are mixed to form a slurry. In the mixed foam method, materials are added at the same time in a similar manner and are vigorously stirred to form a slurry. Regardless of which bubble introduction method is used,
The amount of water is preferably 40 to 100% by weight based on gypsum hemihydrate.
なお、本発明において、用いる半水石膏はα
型、β型のいずれでも良い。 In addition, in the present invention, the hemihydrate gypsum used is α
Either type or β type may be used.
また、緻密質石膏層及び／又は気泡石膏層に繊
維を配合した場合には、得られる硬化体の強度向
上に有効であるが、繊維配合量が多過ぎると成形
性が損なわれる場合がある。従つて、繊維量は石
膏硬化体に対して10重量％以下とするのが適当で
ある。 Further, when fibers are blended into the dense gypsum layer and/or cellular gypsum layer, it is effective in improving the strength of the resulting cured product, but if the amount of fibers blended is too large, moldability may be impaired. Therefore, it is appropriate that the amount of fibers be 10% by weight or less based on the hardened gypsum body.
この補強繊維としては、ガラス繊維、カーボン
繊維、アスベスト、天然もしくは合成の有機高分
子繊維が挙げられる。ガラス繊維としては、スラ
リー混練時にモノフイラメントに解繊する収束の
弱いものが好適であり、また、有機高分子繊維の
具体例としてはビニロン繊維等が挙げられる。こ
れらは、単独で、あるいは２種以上を組み合せて
配合することができる。 Examples of the reinforcing fiber include glass fiber, carbon fiber, asbestos, and natural or synthetic organic polymer fiber. As the glass fibers, those with weak convergence that break into monofilaments during slurry kneading are suitable, and specific examples of the organic polymer fibers include vinylon fibers and the like. These may be used alone or in combination of two or more.
本発明において、製造される硬化体の気泡石膏
層の厚さが厚くて、外表面の緻密質石膏層の厚さ
が薄過ぎると十分な強度が得られず、また逆に気
泡石膏層の厚さが薄く、外表面の緻密質石膏層の
厚さが厚過ぎると硬化体の比重が大きくなり、軽
量性が損なわれる。このため、気泡石膏層の厚さ
は硬化体の全厚さの50〜95程度の厚さとなるよう
にするのが適当である。 In the present invention, if the thickness of the cellular gypsum layer of the cured product to be produced is too thick and the thickness of the dense gypsum layer on the outer surface is too thin, sufficient strength cannot be obtained; If the thickness of the dense gypsum layer on the outer surface is too thick, the specific gravity of the cured product will increase and the lightness will be impaired. For this reason, it is appropriate that the thickness of the cellular gypsum layer is about 50 to 95 times the total thickness of the cured product.
［作用］
従来一般に用いられる平板状のベルトでは、原
料の石膏スラリーをベルト上に直接供給すること
は不可能であつたが、本発明によれば、ボデイベ
ルト上に原料を直接供給することができる。[Function] Conventionally, it was impossible to directly supply the raw material gypsum slurry onto the belt with a generally used flat belt, but according to the present invention, it is possible to directly supply the raw material onto the body belt. can.
即ち、ボデイベルトの平板部とその両側辺部に
設置されたサイドベルトとで、凹部が形成され、
この凹部が移動型枠の役目を果す。このサイドベ
ルトは、ボデイベルトの両側辺の波板状のレツジ
に支持されその形状を安定に保持することができ
る。 That is, a concave portion is formed by the flat plate portion of the body belt and the side belts installed on both sides of the flat plate portion,
This recess serves as a moving formwork. This side belt is supported by corrugated ledges on both sides of the body belt and can stably maintain its shape.
このサイドベルトは、製品である軽量石膏硬化
体の側面を平滑な平面に仕上げる役目を果たす。
更に、上部のならしベルトにより、硬化体の上面
も同様に平滑に仕上げることができる。 This side belt plays the role of finishing the side surface of the lightweight gypsum hardened product into a smooth plane.
Furthermore, the upper surface of the cured product can be finished smoothly using the upper leveling belt.
ボデイベルトを単に直線状に移動する状態で型
枠の役目を果たさせるのであれば、凹状の断面を
有する（平板状のレツジを有する）ボデイベルト
で良い。しかしながら、ボデイベルトはロールに
より終端部で回転して無限軌動を形成するもので
あるので、断面凹状のボデイベルトでは、平板状
レツジが回転部で無理に伸ばされ、上端が破断し
てしまい、使用に耐えない。 If the body belt is to simply move in a straight line and serve as a formwork, a body belt with a concave cross section (with a plate-shaped ledge) may be used. However, since the body belt is rotated by rolls at its terminal end to form an endless orbit, in a body belt with a concave cross section, the flat leg is forcibly stretched at the rotating part, causing the upper end to break. It cannot withstand use.
これに対し、本発明では、レツジの形状を波板
状にしているので、回転ロール部においても、レ
ツジ上端が扇状に無理なく広がり、破断すること
なく良好に回転することができる。 In contrast, in the present invention, since the shape of the ledge is corrugated, even in the rotating roll portion, the upper end of the ledge spreads smoothly into a fan shape, and can be rotated well without breaking.
従つて、本発明によれば、厚紙等の型枠を必要
とせずに、平滑な表面を有する軽量石膏硬化体を
連続的に製造することができる。本発明に従つて
製造される硬化体は、可燃性ないし発煙性物質に
よる被覆がないので、石膏硬化体の耐化材として
の特徴が損なわれることがなく、同一嵩比重の多
泡質石膏のみの硬化体と比べ、曲げ強度が高く、
しかも表面が硬く平滑である。このため、そのま
ま塗装あるいは壁紙等で仕上げることもでき、壁
紙の接着性も良好である。 Therefore, according to the present invention, a lightweight hardened gypsum body having a smooth surface can be continuously manufactured without requiring a mold such as cardboard. Since the hardened body produced according to the present invention is not coated with flammable or smoke-emitting substances, the characteristics of the hardened gypsum body as a resistance material are not impaired, and only porous gypsum of the same bulk specific gravity is used. It has higher bending strength than the hardened body of
Moreover, the surface is hard and smooth. Therefore, it can be painted or finished with wallpaper, etc., and the adhesiveness of wallpaper is also good.
しかも、本発明によれば、外周部の緻密質石膏
スラリーと内部の気泡石膏スラリーとが完全に硬
化する以前に接するので、内部の気泡石膏層と表
面の緻密質石膏層との界面においては、二水石膏
の針状の結晶が互いの層を架橋するように成長し
合つて析出するため、両層間の結合が極めて強固
な軽量石膏硬化体が容易に製造される。 Moreover, according to the present invention, the dense gypsum slurry on the outer periphery and the cellular gypsum slurry on the inside come into contact with each other before they are completely hardened, so that at the interface between the internal cellular gypsum layer and the surface dense gypsum layer, Since needle-shaped crystals of dihydrate gypsum grow and precipitate so as to bridge the layers, a lightweight hardened gypsum body with extremely strong bonding between both layers can be easily produced.
［実施例］
以下、具体的な製造実施例を挙げて本発明を更
に具体的に説明するが、本発明はその要旨を超え
ない限り、以下の実施例に限定されるものではな
い。[Examples] Hereinafter, the present invention will be described in more detail with reference to specific manufacturing examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof.
実施例 １
β−半水石膏100重量部に対し、水70重量部、
クエン酸ナトリウム0.1重量部を混練して、緻密
質石膏スラリーＡを調製した。別にβ−半水石膏
100重量部に対し、水80重量部、アニオン型界面
活性剤0.02重量部、ポリビニルアルコール0.1重
量部を混練して、気泡石膏スラリーＢを調製し
た。Example 1 70 parts by weight of water to 100 parts by weight of β-hemihydrate gypsum,
Dense gypsum slurry A was prepared by kneading 0.1 part by weight of sodium citrate. β-hemihydrate gypsum
Cellular gypsum slurry B was prepared by kneading 100 parts by weight with 80 parts by weight of water, 0.02 parts by weight of an anionic surfactant, and 0.1 parts by weight of polyvinyl alcohol.
第１〜４図に示す装置を用い、供給装置２１及
び２３より上記スラリーＡを供給し、供給装置２
２よりスラリーＢを供給し、平滑な表面を有する
軽量石膏硬化体を連続的に製造した。 Using the device shown in FIGS. 1 to 4, the slurry A is supplied from the supply devices 21 and 23, and the supply device 2
Slurry B was supplied from No. 2 to continuously produce a lightweight hardened gypsum body having a smooth surface.
得られた軽量石膏硬化体は、表層（上、下層）
の緻密質石膏層の厚さがともに５mm、内部気泡石
膏層の厚さが50mm、幅600mmの硬化体で、その物
性値を測定したところ、嵩比重は0.65で、曲げ強
度は25Kg／cm2であつた。また、この軽量石膏硬化
体の表面は硬く、平滑であり、壁紙接着性は極め
て良好であつた。 The obtained lightweight gypsum hardened body has surface layers (upper and lower layers)
When we measured the physical properties of a hardened product with a dense gypsum layer of 5 mm thick, an internal cellular gypsum layer of 50 mm thick, and a width of 600 mm, the bulk specific gravity was 0.65 and the bending strength was 25 Kg/cm 2 It was hot. Furthermore, the surface of this lightweight cured gypsum body was hard and smooth, and the wallpaper adhesiveness was extremely good.
実施例 ２
β−半水石膏100重量部に対し水70重量部、ク
エン酸ナトリウム0.1重量部、メチルセルロース
１重量部、グラスフアイバー１重量部を混練し
て、緻密質石膏スラリーＣを調製した。Example 2 Dense gypsum slurry C was prepared by kneading 100 parts by weight of β-hemihydrate gypsum with 70 parts by weight of water, 0.1 part by weight of sodium citrate, 1 part by weight of methyl cellulose, and 1 part by weight of glass fiber.
スラリーＡのかわりにスラリーＣを用いたこと
以外は実施例１と同様にして軽量石膏硬化体を得
た。この軽量石膏硬化体の嵩比重は0.64で曲げ強
度は34Kg／cm2であつた。また、この軽量石膏硬化
体の表面は硬く、平滑であり、壁紙接着性は極め
て良好であつた。 A lightweight hardened gypsum body was obtained in the same manner as in Example 1 except that Slurry C was used instead of Slurry A. This lightweight hardened gypsum body had a bulk specific gravity of 0.64 and a bending strength of 34 kg/cm 2 . Furthermore, the surface of this lightweight cured gypsum body was hard and smooth, and the wallpaper adhesiveness was extremely good.
以上の結果から、本発明によれば、曲げ強度が
著しく高く、表面が硬く平滑な軽量石膏硬化体を
連続的に製造できることが明らかである。 From the above results, it is clear that according to the present invention, a lightweight hardened gypsum body with extremely high bending strength and a hard and smooth surface can be continuously produced.
［発明の効果］
以上詳述した通り、本発明の軽量石膏硬化体の
製造方法及び製造装置によれば、厚紙等の可燃性
ないし発煙性の物質を用いることなく、外表層が
緻密質石膏層で、内部が気泡石膏層からなる軽量
石膏硬化体を、優れた層間密着性のもとに、容易
かつ効率的に連続生産することができる。[Effects of the Invention] As detailed above, according to the method and apparatus for manufacturing a lightweight hardened gypsum body of the present invention, the outer surface layer can be formed into a dense gypsum layer without using flammable or smoke-emitting substances such as cardboard. With this, it is possible to easily and efficiently continuously produce a lightweight gypsum hardened body having an inner layer of cellular gypsum with excellent interlayer adhesion.
このような本発明の方法及び装置に従つて製造
される軽量石膏硬化体は、軽量で断熱性、遮音性
に優れる上に、
曲げ強度が著しく高く、機械的特性に優れ
る。 The lightweight hardened gypsum body produced according to the method and apparatus of the present invention is lightweight and has excellent heat insulation and sound insulation properties, as well as extremely high bending strength and excellent mechanical properties.
表面が硬く、平滑である。 The surface is hard and smooth.
このため加工性に優れると共に、塗装、壁紙
仕上げも良好に行なうことができる。 Therefore, it has excellent workability and can be applied well to painting and wallpaper finishing.
可燃性ないし発煙性物質の被覆がないため、
石膏の耐火性能が損なわれることがない。 Because there is no coating of flammable or smoke-producing substances,
The fire resistance performance of plaster is not impaired.
等の優れた特徴を有し、耐火建材等として極めて
有用である。It has excellent characteristics such as, and is extremely useful as a fire-resistant building material.
第１図〜第４図は本発明の実施に好適な製造装
置を説明する図であつて、第１図は側断面図、第
２図は平面図、第３図は第２図の−線に沿う
断面図、第４図は第２図部の拡大断面斜視図で
ある。
１…ボデイベルト、２…ならしベルト、３…レ
ツジ、４…サイドベルト、１０…硬化体。
1 to 4 are diagrams for explaining a manufacturing apparatus suitable for implementing the present invention, in which FIG. 1 is a side sectional view, FIG. 2 is a plan view, and FIG. 3 is a line taken along the - line in FIG. FIG. 4 is an enlarged sectional perspective view of the FIG. 2 section. 1... Body belt, 2... Leveling belt, 3... Registration, 4... Side belt, 10... Cured body.
Claims (1)
されたボデイベルトと、このボデイベルトの側辺
に配置され、該レツジの内側に沿つて送行される
サイドベルトと、ボデイベルトの上側に水平に設
置されたならしベルトと、を備えた装置を用い、
ボデイベルト、サイドベルト及びならしベルトを
同期駆動させ、緻密質石膏スラリー、気泡石膏ス
ラリー及び緻密質石膏スラリーをボデイベルト上
に順次に供給して積層することを特徴とする軽量
石膏硬化体の製造方法。 ２ 両側辺に波板状のレツジを有し、水平に設置
されたボデイベルトと、このボデイベルトの側辺
に配置され、該レツジの内側に沿つて送行される
サイドベルトと、ボデイベルトの上側に水平に設
置されたならしベルトと、これらボデイベルト、
サイドベルト及びならしベルトを同期駆動させる
駆動装置とを備えてなる軽量石膏硬化体の製造方
法。[Scope of Claims] 1. A body belt that has corrugated ledges on both sides and is installed horizontally, and a side belt that is placed on the sides of this body belt and is fed along the inside of the ledges. and a leveling belt installed horizontally above the body belt.
Production of a lightweight hardened gypsum body characterized by synchronously driving a body belt, a side belt, and a leveling belt, and sequentially supplying and laminating dense gypsum slurry, cellular gypsum slurry, and dense gypsum slurry onto the body belt. Method. 2. A body belt that has corrugated ledges on both sides and is installed horizontally, a side belt that is placed on the side of this body belt and is fed along the inside of the ledge, and an upper side of the body belt. A leveling belt installed horizontally, and these body belts,
A method for manufacturing a lightweight hardened gypsum body, comprising a drive device for synchronously driving a side belt and a leveling belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7674487A JPS63242503A (en) | 1987-03-30 | 1987-03-30 | Method and device for manufacturing light-weight gypsum cured body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7674487A JPS63242503A (en) | 1987-03-30 | 1987-03-30 | Method and device for manufacturing light-weight gypsum cured body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63242503A JPS63242503A (en) | 1988-10-07 |
| JPH0417772B2 true JPH0417772B2 (en) | 1992-03-26 |
Family
ID=13614110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7674487A Granted JPS63242503A (en) | 1987-03-30 | 1987-03-30 | Method and device for manufacturing light-weight gypsum cured body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63242503A (en) |
-
1987
- 1987-03-30 JP JP7674487A patent/JPS63242503A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63242503A (en) | 1988-10-07 |
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