JPS6356192B2 - - Google Patents
Info
- Publication number
- JPS6356192B2 JPS6356192B2 JP12748180A JP12748180A JPS6356192B2 JP S6356192 B2 JPS6356192 B2 JP S6356192B2 JP 12748180 A JP12748180 A JP 12748180A JP 12748180 A JP12748180 A JP 12748180A JP S6356192 B2 JPS6356192 B2 JP S6356192B2
- Authority
- JP
- Japan
- Prior art keywords
- curing
- original
- cement
- original plate
- autoclave
- 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
- 239000004568 cement Substances 0.000 claims description 21
- 239000003973 paint Substances 0.000 claims description 16
- 239000010410 layer Substances 0.000 claims description 15
- 239000006223 plastic coating Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 229920001169 thermoplastic Polymers 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 1
- 238000001723 curing Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000010425 asbestos Substances 0.000 description 8
- 229910052895 riebeckite Inorganic materials 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】
本発明はセメント製板材の製造方法に関し、例
えば石綿セメント製の板状屋根材の製造に有用で
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cement board, and is useful, for example, for manufacturing a board roofing material made of asbestos cement.
セメント製板材においては、耐吸水性の改良の
ために、表面にプラスチツク塗膜を設けることが
必要である。 For cement board materials, it is necessary to provide a plastic coating on the surface to improve water absorption resistance.
かゝるセメント製板材を製造する方法として、
含水セメント組成物から生原板を成形し、該生原
板を自然養生により一次養生し、該一次養生原板
の表面に熱硬化性のプラスチツク塗料を塗布し、
該塗布原板をオートクレイブ内で最終養生する方
法が公知である。 As a method for manufacturing such cement board materials,
Forming a raw original board from a hydrous cement composition, first curing the raw original board by natural curing, and applying a thermosetting plastic paint to the surface of the primary curing original board,
A method of final curing the coated original plate in an autoclave is known.
この方法によれば、熱硬化性プラスチツク塗料
の塗布層の加熱硬化に、オートクレイブ養生時の
熱（温度120〜140℃）を利用でき、その加熱硬化
のための特別の加熱工程を非要としない。 According to this method, the heat during autoclave curing (temperature 120 to 140°C) can be used to heat-cure the coating layer of thermosetting plastic paint, eliminating the need for a special heating process for heat-curing. do not.
ところで、上記一次養生後の原板を互い密接に
積重した状態でオートクレイブ内において養生す
れば、原板間に〓間を隔てて原板をオートクレイ
ブ内で養生する場合に較べて、多数の原板を秀れ
たスペースフアクターでオートクレイブ内に収容
でき、生産能率上有利である。 By the way, if the original plates after the above primary curing are stacked closely together and cured in an autoclave, a large number of original plates can be cured in the autoclave with gaps between the original plates. It is an excellent space factor and can be stored in an autoclave, which is advantageous in terms of production efficiency.
このように、上記一次養生後の原板を互に密接
に積重した状態でオートクレイブ内において養生
する場合、上記熱硬化性プラスチツクの塗料膜は
原板間でのセメント水の移行を遮断し、原板間で
のセメントの水和反応に基づく一体化を防止する
効果がある。 In this way, when the original plates after the above primary curing are stacked closely together and cured in an autoclave, the thermosetting plastic paint film blocks the migration of cement water between the original plates, and the original plates are cured. This has the effect of preventing unification due to the hydration reaction of cement between the layers.
しかし、この場合、一の原板表面の塗布層の一
部が当該原板直上の原板の裏面に移着して、塗布
層表面が損じられる。而して、かゝる塗布層表面
の損傷の結果は、製品としての板材に充分な耐吸
水性を付与できない。もつとも、上記損傷部分は
最終養生後にさらに上塗り塗装を行なうことによ
り補修可能であるが、養生前に塗布したプラスチ
ツク塗料が熱硬化性であるから養生中に不可逆的
に硬化してしまい、このため、新たに上塗りされ
る塗料との密着性が悪く、後に補修塗装部分が剥
離するおそれがあるといつた欠点があつた。 However, in this case, a part of the coating layer on the surface of one original plate is transferred to the back surface of the original plate directly above the original plate, and the surface of the coating layer is damaged. As a result of such damage to the surface of the coating layer, sufficient water absorption resistance cannot be imparted to the plate material as a product. However, the above-mentioned damaged area can be repaired by applying a top coat after the final curing, but since the plastic paint applied before curing is thermosetting, it hardens irreversibly during curing. The problem was that it had poor adhesion with the newly applied top coat, and there was a risk that the repaired areas would peel off later.
本発明に係るセメント製板材の製造方法は、上
述の不利を解消できる方法であり、含水セメント
組成物の生原板を成形し、該生原板を自然養生に
より一次養生し、該一次養生原板の表面に熱可塑
性のプラスチツク塗料を塗布し、該塗布原板を積
重状態でオートクレイブ内で最終養生し、而るの
ち、上記熱可塑性プラスチツクの塗布層上に、再
度、プラスチツク塗料を塗布することを特徴とす
る方法である。 The method for manufacturing cement board materials according to the present invention is a method that can eliminate the above-mentioned disadvantages, in which a green original plate of a water-containing cement composition is formed, the green original plate is primarily cured by natural curing, and the surface of the primary cured original plate is The method is characterized in that a thermoplastic plastic paint is applied to the coating layer, the coated original plates are finally cured in a stacked state in an autoclave, and then a plastic paint is applied again on the thermoplastic plastic coating layer. This is the method to do so.
以下、図面により本発明を説明する。 The present invention will be explained below with reference to the drawings.
本発明において、含水セメント組成物の生原板
は、各種の方法により成形できるが、代表的な方
法としては乾式法を挙げることができる。 In the present invention, the raw original plate of the hydrated cement composition can be formed by various methods, and a typical method is a dry method.
図面は乾式法による生原板の成形方法を示し、
得られる生原板は二層構造である。 The drawing shows the method of forming the raw original plate using the dry method.
The resulting raw original plate has a two-layer structure.
図面において、１はベルトコンベア、２は石綿
セメント原料供給ボツクスであり、このボツクス
２からベルトコンベア１上に、石綿含量約10重量
％の石綿セメントが落下堆積され、これが均らし
ロール３により一様厚さの層状（層はＡで示す）
に均らされ、次いで孔あきシリンダーからなるエ
アー抜きロール４により脱気が行われ、この脱気
後に、水滴下容器５からの滴下水で上記の層Ａが
湿潤される（湿潤層はA1で示す）。 In the drawing, 1 is a belt conveyor, 2 is an asbestos cement raw material supply box, and asbestos cement with an asbestos content of about 10% by weight is dropped from this box 2 onto the belt conveyor 1, and is uniformly leveled by a leveling roll 3. Layered thickness (layers are indicated by A)
Then, deaeration is performed by an air release roll 4 consisting of a perforated cylinder, and after this deaeration, the above layer A is moistened with dripping water from the water dripping container 5 (the wet layer is A 1 ).
２０は石綿セメント原料供給ボツクスであり、
このボツクス２０から上記の湿潤層A1上に、石
綿含量約５重量％の石綿セメントが落下堆積さ
れ、これが均らしロール３０により一様厚さの層
状（層はＢで示す）に均らされ、次いで、孔あき
シリンダーからなるエアー抜きロール４０により
脱気が行われ、この脱気後に水滴下容器５０から
の滴下水で、層Ｂが湿潤される（湿潤層はB1で
示す）。 20 is an asbestos cement raw material supply box;
Asbestos cement with an asbestos content of about 5% by weight is dropped from this box 20 onto the above-mentioned wet layer A1 , and is leveled by a leveling roll 30 into a layer of uniform thickness (the layer is indicated by B). Then, deaeration is performed by an air release roll 40 consisting of a perforated cylinder, and after this deaeration, layer B is moistened with dripping water from a water dripping container 50 (the wet layer is designated B 1 ).
この湿潤層B1上には、ベニヤ散布容器６並び
に着色珪砂散布容器７からそれぞれベニヤ並びに
着色珪砂が散布される。 On this wet layer B1 , veneer and colored silica sand are sprinkled from a veneer scattering container 6 and a colored silica sand scattering container 7, respectively.
これらの散布後、上記の上下層A1，B1は成形
ロール８により加圧成形され、次いでロールカツ
ター９により所定の長さに切断され、この切断
片、つまり、生原板がベルトコンベアから取出さ
れる。 After scattering, the upper and lower layers A 1 and B 1 are pressure-formed by a forming roll 8, then cut into a predetermined length by a roll cutter 9, and the cut pieces, that is, the raw original plate, are taken out from a belt conveyor. be done.
上記のようにして生原板を成形したのちは、こ
の生原板を自然養生場に運搬し、約３日間の自然
養生により一次養生を行う。 After forming the raw original board as described above, the raw original board is transported to a natural curing field, and primary curing is performed by natural curing for about 3 days.
この自然養生後の一次養生原板表面には、熱可
塑性のプラスチツク塗料、例えばアクリル樹脂の
エマルジヨン塗料を塗布する。 After this natural curing, a thermoplastic plastic paint, such as an acrylic resin emulsion paint, is applied to the surface of the primary curing original plate.
次いで、この塗布原板を互に密接して積重し、
この積重体をオートクレイブ内に搬入し、温度
120〜140℃の飽和水蒸気で最終養生を行う。 Next, the coated original plates are stacked closely together,
This stack is carried into an autoclave, and the temperature is
Final curing is performed with saturated steam at 120-140℃.
この最終養生後は、積重原板をオートクレイブ
から取出し、各原板ごとに、原板を約60℃の温度
に予熱し、上記のプラスチツク塗布層上に再度プ
ラスチツク塗料を塗布する。 After this final curing, the stack of blanks is removed from the autoclave, each blank is preheated to a temperature of about 60° C., and the plastic coating layer is again coated with plastic paint.
このプラスチツク塗料には、上記と同一の熱可
塑性プラスチツク塗料、例えばアクリル樹脂のエ
マルジヨン塗料の他、熱硬化性のプラスチツク塗
料も使用できる。 In addition to the same thermoplastic paints as mentioned above, such as acrylic resin emulsion paints, thermosetting plastic paints can also be used as the plastic paint.
本発明に係るセメント製板材の製造方法におい
ては、上述した通り、一次養生後の原板を互に密
接に積重してオートクレイブにより最終養生して
いるが、原板上にはプラスチツク塗膜が存在して
いるので、オートクレイブ養生時、原板間でのセ
メント水の移行がなく、原板の相互接着を防止で
きる。 In the method for manufacturing cement board materials according to the present invention, as described above, the original plates after primary curing are stacked closely together and final curing is performed in an autoclave, but there is a plastic coating film on the original plates. Therefore, during autoclave curing, there is no transfer of cement water between the original plates, and it is possible to prevent the original plates from adhering to each other.
この場合、一のセメント原板の表面のプラスチ
ツク塗料が、その直上の原板の裏面に移着して、
そのプラスチツク塗膜が損じられるが、最終養生
後に、再度、プラスチツク塗料を塗布しているの
で、上記塗膜の損傷は補償できる。しかも、セメ
ント原板直上のプラスチツク塗膜が熱可塑性であ
るので、上記再度のプラスチツク塗膜とその熱可
塑性プラスチツク塗膜との接着性も良好に保障で
きる。 In this case, the plastic paint on the surface of the first cement base plate is transferred to the back side of the base plate directly above it, and
Although the plastic coating is damaged, since the plastic coating is reapplied after the final curing, the damage to the coating can be compensated for. Moreover, since the plastic coating film directly on the cement base plate is thermoplastic, good adhesion between the above-mentioned plastic coating film and the thermoplastic plastic coating film can also be ensured.
図面は本発明において使用する生原板の成形装
置の一例を示す説明図である。
図において、１はベルトコンベア、２，２０は
石綿セメント供給ボツクス、３，３０は均らしロ
ール、４，４０はエアー抜きロール、５，５０は
水滴下容器、８は成形ロール、９はロールカツタ
ーである。
The drawing is an explanatory diagram showing an example of a raw original plate forming apparatus used in the present invention. In the figure, 1 is a belt conveyor, 2 and 20 are asbestos cement supply boxes, 3 and 30 are leveling rolls, 4 and 40 are air release rolls, 5 and 50 are water dripping containers, 8 is a forming roll, and 9 is a roll cutter. It is.
Claims (1)
原板を自然養生により一次養生し、該一次養生原
板の表面に熱可塑性のプラスチツク塗料を塗布
し、該塗布原板を積重状態でオートクレイブ内で
最終養生し、而るのち、上記熱可塑性プラスチツ
クの塗布層上に、再度、プラスチツク塗料を塗布
することを特徴とするセメント製板材の製造方
法。1. Molding a raw original plate of a hydrous cement composition, first curing the raw original plate by natural curing, applying a thermoplastic plastic paint to the surface of the first curing original plate, and placing the coated original plates in a stacked state in an autoclave. A method for producing a cement plate material, which comprises curing the material for final curing, and then applying a plastic paint again on the thermoplastic plastic coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12748180A JPS5751187A (en) | 1980-09-12 | 1980-09-12 | Manufacture of cement board material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12748180A JPS5751187A (en) | 1980-09-12 | 1980-09-12 | Manufacture of cement board material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5751187A JPS5751187A (en) | 1982-03-25 |
| JPS6356192B2 true JPS6356192B2 (en) | 1988-11-07 |
Family
ID=14961000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12748180A Granted JPS5751187A (en) | 1980-09-12 | 1980-09-12 | Manufacture of cement board material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5751187A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63151693A (en) * | 1986-12-16 | 1988-06-24 | 三菱マテリアル株式会社 | Surface finishment for cement set body |
-
1980
- 1980-09-12 JP JP12748180A patent/JPS5751187A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5751187A (en) | 1982-03-25 |
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