JP2000096498A - Production of fiber panel - Google Patents
Production of fiber panelInfo
- Publication number
- JP2000096498A JP2000096498A JP10315284A JP31528498A JP2000096498A JP 2000096498 A JP2000096498 A JP 2000096498A JP 10315284 A JP10315284 A JP 10315284A JP 31528498 A JP31528498 A JP 31528498A JP 2000096498 A JP2000096498 A JP 2000096498A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- fiber
- containing slurry
- fiber panel
- flat plate
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000002002 slurry Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920001971 elastomer Polymers 0.000 claims abstract description 14
- 239000000806 elastomer Substances 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000005266 casting Methods 0.000 claims description 8
- 239000000969 carrier Substances 0.000 abstract 1
- 230000018044 dehydration Effects 0.000 description 24
- 238000006297 dehydration reaction Methods 0.000 description 24
- 238000000748 compression moulding Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 20
- 239000002994 raw material Substances 0.000 description 11
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002657 fibrous material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000005370 electroosmosis Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- 108700042918 BF02 Proteins 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 for example Polymers 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000007582 slurry-cast process Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Paper (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、繊維パネルの製造
方法に関し、特に、複数のリブにより構成される開口セ
ル格子と、該格子の一方の開口部を覆う連続的な平板
と、他方の開口部の一部を覆うフランジとが、緻密な圧
縮繊維により一体成形された構造の繊維パネルの製造方
法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 fiber panel, and more particularly to an open cell grid constituted by a plurality of ribs, a continuous flat plate covering one opening of the grid, and the other opening. The present invention relates to a method for manufacturing a fiber panel having a structure in which a flange covering a part of a portion is integrally formed with dense compressed fibers.
【０００２】[0002]
【従来の技術及びその課題】特開平９−１９５４４０号
公報に、開口セル格子を有する繊維パネルの製造方法が
開示されている。かかる製造方法の概略は、概ね次の如
くである。2. Description of the Related Art Japanese Patent Application Laid-Open No. 9-195440 discloses a method of manufacturing a fiber panel having an open cell grid. The outline of such a manufacturing method is generally as follows.
【０００３】先ず、例えば木材繊維、再生紙等の原料Ａ
を強力な攬拌力によりパルプ化し、水分濃度９９％程度
の繊維含有スラリーＳとする〔図７（ａ）参照〕。続い
て、該スラリーＳを、図４に示した多孔性キャリア５１
と、該多孔性キャリア５１の板面に幾何学的に配置固定
された複数のエラストマーパッド５２とから構成された
型枠５０上に打設し〔図７（ｂ）参照〕、該型枠５０の
上・下方向からの平盤によるプレス（プリプレス）及び
型枠５０の下面からの吸引により脱水し、スラリーＳを
水分濃度５０％程度の脱水ケーキＫとする〔図７（ｃ）
参照〕。First, a raw material A such as wood fiber, recycled paper, etc.
Is pulped with strong stirring power to obtain a fiber-containing slurry S having a water concentration of about 99% (see FIG. 7A). Subsequently, the slurry S is mixed with the porous carrier 51 shown in FIG.
And a plurality of elastomer pads 52 geometrically arranged and fixed on the plate surface of the porous carrier 51 (see FIG. 7B). Is dewatered by pressing (pre-pressing) using a flat plate from above and below and suction from the lower surface of the mold 50 to make the slurry S into a dewatered cake K having a water concentration of about 50% [FIG.
reference〕.
【０００４】その後、型枠５０をホットプレス６０に搬
送し、加熱下において型枠５０に対して垂直方向の圧力
を加えることにより脱水ケーキＫを加熱圧縮成形し〔図
８（ａ）参照〕、水分濃度８％程度の成形品Ｘとする。
この際、型枠５０を構成する上記エラストマーパッド５
２が、図５に示したように、プレスの圧縮力により偏平
に変形し、パッド間に充填された脱水ケーキＫを型枠に
対して垂直方向のみならず平行な方向にも圧縮し、緻密
な開口セル格子を有する繊維パネルに成形する。[0004] Thereafter, the mold 50 is conveyed to a hot press 60, and the dewatered cake K is heated and compressed by applying a vertical pressure to the mold 50 under heating (see FIG. 8 (a)). A molded article X having a moisture concentration of about 8% is used.
At this time, the above-mentioned elastomer pad 5 forming the mold 50 is formed.
5, as shown in FIG. 5, deforms flat by the compression force of the press, compresses the dewatered cake K filled between the pads not only in the direction perpendicular to the mold but also in the direction parallel to the mold, and Into a fiber panel having a simple open cell grid.
【０００５】成形が完了した後、型枠５０と共に成形品
Ｘをホットプレス６０から取り出し、成形品Ｘを型枠５
０から脱型する〔図８（ｂ）参照〕。After the molding is completed, the molded product X together with the mold 50 is taken out of the hot press 60 and the molded product X is removed from the mold 5.
The mold is released from 0 (see FIG. 8B).
【０００６】上記した工程によって、図６に示した複数
のリブにより構成される開口セル格子７１と、該格子７
１の一方の開口部を覆う連続的な平板７２と、他方の開
口部の一部を覆うフランジ７３とが、緻密な圧縮繊維に
より一体成形された構造の繊維パネル７０を製造するこ
とが出来る。By the above-described steps, the open cell grid 71 composed of a plurality of ribs shown in FIG.
A fiber panel 70 having a structure in which a continuous flat plate 72 covering one opening and a flange 73 covering a part of the other opening is integrally formed of dense compressed fibers can be manufactured.
【０００７】ここで、上記開口セル格子を有する繊維パ
ネル７０の製造工程中、ホットプレス６０による脱水ケ
ーキＫの加熱圧縮成形工程に要する電力量は、概ね成形
品１ｋｇ当たり１０ｋＷｈ程度であり、全体の電力消費
量の８割近くをこの工程において占め、製造コストを高
騰させていた。Here, during the manufacturing process of the fiber panel 70 having the open cell grid, the amount of electric power required for the heating and compression molding process of the dewatered cake K by the hot press 60 is approximately 10 kWh per 1 kg of the molded product. Nearly 80% of the electric power consumption is occupied in this process, and the manufacturing cost is soaring.
【０００８】これは、加熱圧縮成形工程に移行する際の
脱水ケーキＫの水分濃度が、５０％程度と高いことに起
因していることは明らかであるが、従来の前工程におけ
る圧搾と吸引と言う機械的脱水のみでは、その脱水効果
にはおのずと限度があり、特に、本発明が対象としてい
る開口セル格子を有する繊維パネル７０の製造において
は、開口セル格子を構成する薄肉のリブ部分の脱水が特
にネックとなり、最終工程である加熱圧縮成形工程前
に、脱水ケーキＫの水分濃度を５０％未満に持っていく
ことは困難であったことによる。[0008] This is apparently due to the fact that the water concentration of the dewatered cake K at the time of shifting to the heat compression molding step is as high as about 50%. The mechanical dewatering alone has its own dewatering effect. In particular, in the production of the fiber panel 70 having the open cell grid, which is the object of the present invention, the dewatering of the thin rib portions constituting the open cell grid is performed. However, it is difficult to reduce the water concentration of the dewatered cake K to less than 50% before the final compression molding step.
【０００９】そのため、本発明が対象としている開口セ
ル格子を有する繊維パネルは、軽量で且つ高強度のパネ
ルとなり、住宅用部材、建具或いは家具等の幅広い用途
が考えられ、古紙等のリサイクル資源の有効活用を図れ
る製品であると期待されたが、その製造原価が高いこと
から、需要が伸びなやんでいた。Therefore, the fiber panel having the open cell grid which is the object of the present invention is a lightweight and high-strength panel, and can be used for a wide range of applications such as housing members, fittings, furniture, etc. It was expected that the product could be used effectively, but demand was stagnant due to its high manufacturing cost.
【００１０】本発明は、上述した従来の開口セル格子を
有する繊維パネルの製造方法が有する課題に鑑み成され
たものであって、その目的は、製品を製造するための全
工程を含めたトータル的な電力消費量を節減し、安価に
開口セル格子を有する繊維パネルを製造できる方法を提
供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the above-described conventional method of manufacturing a fiber panel having an open cell grid, and has an object to provide a total method including all steps for manufacturing a product. It is an object of the present invention to provide a method capable of manufacturing a fiber panel having an open cell grid at a low cost, while saving power consumption.
【００１１】[0011]
【課題を解決するための手段】本発明者らは、上記した
目的を達成すべく検討を重ねた結果、汚泥の脱水技術と
して従来より広く知られている電気浸透脱水に着目し、
該電気浸透脱水と従来より行われている圧搾・吸引と言
う機械的脱水とを、型枠上に打設された繊維含有スラリ
ーの脱水に併用することによって、加熱圧縮成形工程前
に脱水ケーキの水分濃度を５０％未満の所定水準まで持
っていくことが可能であり、またこの水準まで含水率が
下げられた脱水ケーキの加熱圧縮成形に要する電力量
は、従来より大幅に節減でき、電気浸透脱水を前工程に
おいて併用したことによる電力消費量の増加を考慮して
も、トータル的な電力消費量を抵く抑えることができる
ことを見出し、本発明を完成させた。Means for Solving the Problems As a result of repeated studies to achieve the above object, the present inventors have focused on electroosmotic dehydration, which has been widely known as a sludge dewatering technology.
By using the electroosmotic dehydration and the mechanical dehydration called compression / suction conventionally performed together with the dehydration of the fiber-containing slurry cast on the mold, the dewatered cake is heated before the heat compression molding step. It is possible to bring the water concentration to a predetermined level of less than 50%, and the amount of electric power required for heat compression molding of a dewatered cake having a reduced water content to this level can be significantly reduced compared to the conventional method, The present inventors have found that the total power consumption can be suppressed even when considering the increase in power consumption due to the combined use of dehydration in the previous step, and completed the present invention.
【００１２】即ち、本発明は、多孔性キャリアと、該多
孔性キャリアの板面に幾何学的に配置固定された複数の
エラストマーパッドとから構成された型枠を使用し、複
数のリブにより構成される開口セル格子と、該格子の一
方の開口部を覆う連続的な平板と、他方の開口部の一部
を覆うフランジとが、緻密な圧縮繊維により一体成形さ
れた構造の繊維パネルを製造する方法において、上記型
枠上に繊維含有スラリーを打設する工程と、前記型枠上
に打設された繊維含有スラリーを、型枠の上・下方向か
らの平盤によるプレス及び型枠の下面からの吸引によっ
て圧搾・吸引脱水すると共に、上記プレス用平盤間に直
流電圧を印加して繊維含有スラリーを軍気浸透脱水し、
水分濃度３５〜４５％の脱水ケーキとする工程と、前記
型枠上の脱水ケーキを加熱圧縮成形し、水分濃度１０％
以下の成形品とする工程とから成る繊維パネルの製造方
法とした。That is, the present invention uses a mold comprising a porous carrier and a plurality of elastomer pads geometrically arranged and fixed on the plate surface of the porous carrier, and comprises a plurality of ribs. Manufacturing a fiber panel having a structure in which an open cell grid to be formed, a continuous flat plate covering one opening of the grid, and a flange covering a part of the other opening are integrally formed by dense compressed fibers. In the method, the step of casting the fiber-containing slurry on the mold, and the step of casting the fiber-containing slurry cast on the mold, press the flat form from above and below the form and press the form. While squeezing and suction dewatering by suction from the lower surface, applying a DC voltage between the flat plates for pressing, the fiber-containing slurry is subjected to military osmosis dewatering,
A step of forming a dewatered cake having a water concentration of 35 to 45%, and a step of heating and compression molding the dewatered cake on the mold to form a dewatered cake having a water concentration of 10%.
A method for producing a fiber panel comprising the following steps of forming a molded article.
【００１３】ここで、上記型枠上に打設された繊維含有
スラリーの脱水は、電気浸透脱水と圧搾・吸引と言う機
械的脱水とを併用することによって、加熱圧縮成形工程
前に水分濃度３５〜４５％の脱水ケーキまで持っていく
ことが重要である。これは、４５％を越える脱水ケーキ
の加熱圧縮成形にはかなりの電力量が必要となり、前工
程において電気浸透脱水を併用したことによる電力消費
量の増加を考慮した場合、トータル的な電力消費量の節
減効果が少ないためであり、また逆に３５％未満の脱水
ケーキまで持っていくことは、電気浸透脱水と機械的脱
水とを併用したとしても短時間では困難であり、繊維含
有スラリーの脱水工程における電力消費量が急激に増加
するために好ましくない。[0013] The fiber-containing slurry cast on the mold is dewatered by using both electroosmotic dehydration and mechanical dehydration such as squeezing and suction, so that a water concentration of 35% can be obtained before the heat compression molding step. It is important to bring up to ~ 45% dehydrated cake. This is because a considerable amount of power is required for heat compression molding of a dewatered cake exceeding 45%, and considering the increase in power consumption due to the combined use of electroosmotic dehydration in the previous process, the total power consumption is considered. It is difficult to bring a dewatered cake of less than 35% in a short time even if both electroosmotic dewatering and mechanical dewatering are used. This is not preferable because the power consumption in the process increases rapidly.
【００１４】また、本発明においては、上記型枠上に繊
維含有スラリーを打設する工程は、従来と同様に、繊維
含有スラリーを重力の作用のみによって型枠上に打設す
るものであっても良いが、水分濃度６５〜８０％の繊維
含有スラリーを、型枠の下面から吸引しながら打設する
ものとすることが好ましい。これは、製造にかかるトー
タル的な電力消費量の節減を考慮した場合、原料となる
繊維含有スラリーの水分濃度は低ければ低い程、その後
の脱水等に要する電力量が少なくなるために好ましいの
であるが、本発明において使用する型枠は、上述したよ
うに複数のエラストマーパッドが多孔性キャリアの板面
に幾何学的に配置固定されたものであるため、水分濃度
が低く、流動性を有しない原料の場合には、エラストマ
ーパッド間への原料の充填が不十分となり、製品強度が
低下するために吸引しながら打設することが好ましく、
この際、水分濃度６５％に満たない繊維含有スラリーで
は、吸引しても充填が不十分となり、逆に水分濃度８０
％を越える繊維含有スラリーの場合は、トータル的な電
力消費量の節減効果が少ないために好ましくない。Further, in the present invention, the step of casting the fiber-containing slurry on the mold is, like the conventional one, casting the fiber-containing slurry on the mold only by the action of gravity. However, it is preferable that the fiber-containing slurry having a water concentration of 65 to 80% be poured while being sucked from the lower surface of the mold. This is preferable in consideration of the reduction in the total power consumption of the production, because the lower the water concentration of the fiber-containing slurry as the raw material is, the smaller the amount of power required for the subsequent dehydration and the like is. However, since the mold used in the present invention has a plurality of elastomer pads geometrically arranged and fixed on the plate surface of the porous carrier as described above, the moisture concentration is low, and the mold does not have fluidity. In the case of a raw material, the filling of the raw material between the elastomer pads is insufficient, and it is preferable that the raw material is poured while being sucked in order to reduce the product strength,
At this time, with a fiber-containing slurry having a water concentration of less than 65%, the filling becomes insufficient even when sucked, and conversely, a water concentration of 80% is obtained.
% Is not preferable because the effect of reducing the total power consumption is small.
【００１５】さらに、本発明においては、上記型枠上の
脱水ケーキを加熱圧縮成形する工程は、やはり従来と同
様に、ヒーター或いは加熱流体によって加熱された状態
にあるホットプレスを使用して行っても良いが、型枠の
上・下方向からの平盤によるプレス下において、前記プ
レス用平盤間に高周波電圧を印加して脱水ケーキを高周
波誘電加熱するものとすることが好ましい。これは、上
段においても記載したように、本発明において使用する
型枠は、熱伝導率の低いシリコンゴム等の弾性材料で作
られたエラストマーパッドをその構成部材としているた
め、従来の伝導伝熱を期待した加熱された平盤のプレス
による加熱圧縮成形よりも、高周波電圧の印加により、
脱水ケーキ自体に誘電加熱を起こさせた方が効率の良い
加熱が可能となるために好ましい。Further, in the present invention, the step of heating and compressing the dewatered cake on the mold is performed by using a hot press heated by a heater or a heating fluid as in the conventional case. However, it is preferable to apply a high-frequency voltage between the pressing flat plates to perform high-frequency dielectric heating of the dehydrated cake under a flat plate pressing from above and below the mold. This is because, as described in the upper part, the mold used in the present invention has an elastomer pad made of an elastic material such as silicon rubber having a low thermal conductivity as a constituent member thereof. By applying a high-frequency voltage,
It is preferable to cause dielectric heating on the dewatered cake itself because efficient heating is possible.
【００１６】[0016]
【発明の実施の形態】以下、上記した本発明にかかる繊
維パネルの製造方法の実施の形態を、図面に基づいて詳
細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the above-described method of manufacturing a fiber panel according to the present invention will be described in detail with reference to the drawings.
【００１７】本発明で使用する型枠は、従来と同様のも
のが使用できる。即ち、図４に示したように、多孔性キ
ャリア５１と、その板面に幾何学的に配置固定された複
数のエラストマーパッド５２とから構成された型枠５０
である。この型枠５０のエラストマーパッド５２の各々
は、図５にも示したように、該パッドが圧縮される際
に、その中心から外側に向かって上記キャリアに平行に
拡大し、パッド間に充填された繊維を圧縮すると同時
に、パッドの上及び拡大したパッドの下に位置する繊維
をも圧縮できるような所定のサイズ及び形状を呈してい
る。[0017] As the mold used in the present invention, the same one as the conventional one can be used. That is, as shown in FIG. 4, a mold 50 composed of a porous carrier 51 and a plurality of elastomer pads 52 geometrically arranged and fixed on the plate surface thereof.
It is. As shown in FIG. 5, each of the elastomer pads 52 of the formwork 50 expands parallel to the carrier from the center to the outside when the pad is compressed, and is filled between the pads. The fibers have a predetermined size and shape so that the fibers located above the pad and below the enlarged pad can be compressed at the same time as the compressed fibers are compressed.
【００１８】上記多孔性キャリア５１は、通常矩形の金
属製板に、複数の貫通穴を穿設した構造のもので、その
周囲板面には、図４に示したように補強を兼ねて帯状の
プレスストッパー５３が添設されている。なお、この多
孔性キャリア５１は、一枚の板体により構成されていて
も、また複数枚の板体を重ね合わせて構成されていても
良い。また、上記エラストマーパッド５２は、十分な弾
性を有する材料で形成されており、例えばシリコンゴ
ム、クロロプレンゴムなどを含む、各種の合成ゴムを用
いて形成することができるが、中でもシリコンゴムが耐
久性及び弾性を考慮した場合に特に優れている。そし
て、このエラストマーパッド５２を、図４において拡大
して示したように、断面六角形の台形体とすることによ
り、製造される繊維パネル７０のセル格子７１を、図６
に示したように六角形とすることが可能となる。The porous carrier 51 has a structure in which a plurality of through-holes are formed in a generally rectangular metal plate, and its peripheral plate surface has a belt-like shape for reinforcement as shown in FIG. A press stopper 53 is additionally provided. In addition, the porous carrier 51 may be configured by a single plate, or may be configured by stacking a plurality of plates. Further, the elastomer pad 52 is formed of a material having sufficient elasticity, and can be formed using various synthetic rubbers including, for example, silicon rubber and chloroprene rubber. It is particularly excellent when considering elasticity. Then, by forming the elastomer pad 52 into a trapezoid having a hexagonal cross section as shown in an enlarged manner in FIG. 4, the cell grid 71 of the fiber panel 70 to be manufactured is changed to the shape shown in FIG.
It is possible to form a hexagon as shown in FIG.
【００１９】本発明にかかる製造方法においては、先ず
上記型枠５０上に繊維含有スラリーＳを打設する。この
繊維含有スラリーＳの打設工程は、従来と同様に、例え
ば木材繊維、再生紙等の原料Ａを強力な攬拌力によりパ
ルプ化し、水分濃度９９％程度の繊維含有スラリーＳに
調整した後、該繊維含有スラリーＳを、重力の作用のみ
によって型枠５０上に打設するものであっても良いが、
図１に示したように、型枠５０の下面から吸引しなが
ら、水分濃度６５〜８０％に調整された繊維含有スラリ
ーＳを、型枠５０上に打設する方法を採用することが好
ましい。これは、繊維含有スラリーＳを型枠であるエラ
ストマーパッド５２間に十分に充填できると共に、その
水分濃度を低下させることができ、後の脱水等に要する
電力を節減できるために好ましい。In the manufacturing method according to the present invention, first, the fiber-containing slurry S is cast on the mold 50. In the casting step of the fiber-containing slurry S, the raw material A such as wood fiber or recycled paper is pulped by a strong stirring force to adjust the fiber-containing slurry S into a fiber-containing slurry S having a water concentration of about 99%. The fiber-containing slurry S may be cast on the mold 50 only by the action of gravity,
As shown in FIG. 1, it is preferable to adopt a method in which a fiber-containing slurry S adjusted to a water concentration of 65 to 80% is poured onto the mold 50 while sucking from the lower surface of the mold 50. This is preferable because the fiber-containing slurry S can be sufficiently filled in the space between the elastomer pads 52 serving as a mold, the water concentration thereof can be reduced, and the power required for subsequent dehydration can be reduced.
【００２０】ここで、本発明者らが行った試験によれ
ば、この打設工程における吸引圧力は、スラリーＳの水
分濃度にも左右されるが、概ね−６５０ｍｍＨｇ程度で
吸引すれば目的は達成でき、その際のスラリーＳの水分
濃度は、６５％に満たない場合には、吸引圧力を上昇さ
せても型枠上への原料の充填が不十分となり好ましくな
く、また、８０％を越える場合には、トータル的な電力
消費量の節減効果が少ないために好ましくなかった。Here, according to the test conducted by the present inventors, the suction pressure in this casting step also depends on the water concentration of the slurry S. However, if the suction is performed at about -650 mmHg, the object can be achieved. If the water concentration of the slurry S at that time is less than 65%, the filling of the raw material on the mold is not preferable even if the suction pressure is increased, and if it exceeds 80%. Is not preferable because the effect of reducing the total power consumption is small.
【００２１】続いて、上記型枠５０上に打設された繊維
含有スラリーＳを、水分濃度３５〜４５％の脱水ケーキ
Ｋにまで脱水する。この繊維含有スラリーＳの脱水工程
においては、電気浸透脱水と、圧搾・吸引と言う機械的
脱水とを併用して行う。即ち、図２に示したように、型
枠５０の上・下方向からの平盤によるプレスと、型枠５
０の下面からの吸引によって繊維含有スラリーＳを圧搾
・吸引脱水すると共に、上記プレス用平盤間に直流電圧
を印加すると、平盤間に挟まれた繊維含有スラリーＳに
は電流が流れる。ここで、スラリーＳ中に分散している
繊維質材は、通常マイナス電荷を帯びた状態にあり、こ
の繊維質材と接する周囲の液体は、繊維質材の表面電荷
と逆極性のプラスに帯電している。そのため、上方のプ
レス用平盤をプラス極、下方のプレス用平盤をマイナス
極として直流電源より電圧を印加すると、電気浸透現象
の働きによりスラリーＳ中に含まれている液体は繊維質
材間を毛細管として下方のプレス用平盤側に移動し、型
枠５０の下面からの吸引により外部に排水される。これ
により、圧搾・吸引と言う機械的脱水のみでは達成し得
なかった、水分濃度３５〜４５％の脱水ケーキＫにま
で、繊維含有スラリーＳを脱水することができる。Subsequently, the fiber-containing slurry S cast on the mold 50 is dewatered to a dewatering cake K having a water concentration of 35 to 45%. In the dehydration step of the fiber-containing slurry S, electroosmosis dehydration and mechanical dehydration called compression / suction are performed in combination. That is, as shown in FIG. 2, a press using a flat plate from above and below the
When the fiber-containing slurry S is squeezed and suction-dehydrated by suction from the lower surface of the pressurized sheet 0, and a DC voltage is applied between the press flat plates, a current flows through the fiber-containing slurry S sandwiched between the flat plates. Here, the fibrous material dispersed in the slurry S is usually in a negatively charged state, and the surrounding liquid in contact with the fibrous material is charged to a positive polarity opposite to the surface charge of the fibrous material. are doing. Therefore, when a voltage is applied from a DC power supply with the upper pressing flat plate as a positive electrode and the lower pressing flat plate as a negative electrode, the liquid contained in the slurry S by the action of the electroosmosis phenomenon is interposed between the fibrous materials. Is moved to the lower side of the press flat plate as a capillary, and is drained to the outside by suction from the lower surface of the mold 50. Thus, the fiber-containing slurry S can be dewatered to a dewatered cake K having a water concentration of 35 to 45%, which cannot be achieved only by mechanical dehydration called compression and suction.
【００２２】ここで、本発明者らが行った試験によれ
ば、上記プレス用平盤によって加える圧縮圧力は１０〜
１２ｋｇｆ／ｃｍ２とし、また型枠の下面からの吸引圧
力は−６５０ｍｍＨｇ程度とする。そして、プレス用平
盤間に印加する直流電源の電圧は２００〜４００Ｖで、
４５〜９０秒間印加して電気浸透脱水と機械的脱水とを
併用して行うと、水分濃度３５〜４５％の脱水ケーキＫ
にまで、繊維含有スラリーＳを脱水することができた。
なお、吸引による脱水は、型枠５０の下面からのみなら
ず、図示したように上方のプレス用平盤にも細孔を設
け、型枠５０の上方からも吸引できるようにしても良
い。Here, according to a test conducted by the present inventors, the compression pressure applied by the flat plate for pressing is 10 to 10.
And 12 kgf / cm 2, also the suction pressure from the bottom surface of the mold is set to about -650MmHg. And the voltage of the DC power supply applied between the press flat plates is 200 to 400 V,
When the electroosmotic dehydration and the mechanical dehydration are performed in combination by applying for 45 to 90 seconds, the dehydrated cake K having a water concentration of 35 to 45% is obtained.
, The fiber-containing slurry S could be dehydrated.
The dehydration by suction may be performed not only from the lower surface of the mold 50 but also on the press flat plate above as shown in the drawing, so that suction can be performed from above the mold 50.
【００２３】次ぎに、型枠５０上の脱水ケーキＫを加熱
圧縮成形し、水分濃度１０％以下の成形品Ｘとする。こ
の脱水ケーキＫの加熱圧縮成形工程は、従来と同様に、
ホットプレスを使用し、ヒーター或いは加熱流体によっ
て加熱された状態にある平盤を、型枠５０の上・下方向
からプレスする方法を採っても良いが、図３に示したよ
うに、型枠５０の上・下方向からの平盤によるプレス下
において、前記プレス用平盤間に高周波電圧を印加し、
脱水ケーキＫ自体を高周波誘電加熱するものとすること
が好ましい。これは、本発明において使用する型枠は、
上記したように熱伝導率の低いシリコンゴム等の弾性材
料で作られたエラストマーパッド５２をその構成部材と
しているため、伝導伝熱を期待した加熱された平盤のプ
レスによる加熱圧縮成形よりも、高周波電圧の印加によ
り、脱水ケーキ自体に誘電加熱を起こさせた方が効率の
良い加熱が可能となるために好ましい。なお、脱水ケー
キＫを高周波誘電加熱する際に、図３に示したように、
型枠５０の上・下方向から吸引することにより、蒸発し
た液体分を吸引除去することとすると、平盤間の絶縁度
が高まり、効率のよい脱水ケーキＫの誘電加熱が可能と
なるために好ましい。また、同図に示したように、プレ
ス用平盤のプレス面を、ヒーター或いは加熱媒体により
１２０〜１６０℃程度に加熱した状態とし、型枠５０の
上・下方向からの伝導伝熱による脱水ケーキＫの加熱を
も併用する構成とすると、高周波電力が不均一にかかる
ことによる脱水ケーキＫの乾燥ムラを、解消することが
できるために好ましい。Next, the dewatered cake K on the mold 50 is subjected to heat compression molding to obtain a molded product X having a water concentration of 10% or less. The heat compression molding step of the dewatered cake K is performed in the same manner as in the prior art.
A flat plate heated by a heater or a heating fluid may be pressed from above and below the mold 50 using a hot press, but as shown in FIG. Under a press by a flat plate from above and below 50, applying a high-frequency voltage between the flat plates for press,
It is preferable that the dewatered cake K itself is subjected to high-frequency dielectric heating. This is because the formwork used in the present invention is
As described above, since the elastomer pad 52 made of an elastic material having a low thermal conductivity, such as silicon rubber, is used as a constituent member thereof, compared to the heat compression molding by the press of a heated flat plate expecting conductive heat transfer, It is preferable to cause dielectric heating of the dewatered cake itself by applying a high-frequency voltage because efficient heating becomes possible. When the dewatered cake K is subjected to high-frequency dielectric heating, as shown in FIG.
If the vaporized liquid is suctioned and removed by suctioning the mold 50 from above and below, the insulation between the flat plates is increased, and efficient dielectric heating of the dewatered cake K becomes possible. preferable. Further, as shown in the figure, the press surface of the press flat plate is heated to about 120 to 160 ° C. by a heater or a heating medium, and dehydration by conduction heat transfer from above and below the mold 50. It is preferable to use a configuration in which heating of the cake K is also used, because drying unevenness of the dewatered cake K due to uneven application of high-frequency power can be eliminated.
【００２４】ここで、本発明者らが行った試験によれ
ば、この加熱圧縮成形工程においてプレス用平盤によっ
て型枠５０上の脱水ケーキＫに加える圧縮圧力は、概ね
１０〜１２ｋｇｆ／ｃｍ２程度とし、また、このプレス
用平盤間に印加する高周波電圧は、周波数１３．５６Ｍ
Ｈｚ、電圧２００Ｖの高周波電圧を、１２０〜１８０秒
間程度印加すれば、型枠５０上の脱水ケーキＫを、水分
濃度１０％以下の成形品Ｘとすることができた。Here, according to the test conducted by the present inventors, the compression pressure applied to the dewatered cake K on the mold 50 by the flat plate for press in this heating compression molding step is generally 10 to 12 kgf / cm 2. The high-frequency voltage applied between the pressing flat plates has a frequency of 13.56 M
When a high-frequency voltage of 200 Hz and a voltage of 200 V was applied for about 120 to 180 seconds, the dehydrated cake K on the mold 50 could be formed into a molded product X having a water concentration of 10% or less.
【００２５】また、本発明者らが行った試験によれば、
水分濃度５０％程度の脱水ケーキＫをホットプレスによ
り加熱圧縮成形した場合の電力量は、従来の技術の項に
おいても記載したように、概ね成形品１ｋｇ当たり１０
ｋＷｈ程度であったが、前工程において電気浸透脱水と
圧搾・吸引と言う機械的脱水とを併用することによっ
て、水分濃度３５〜４５％まで持っていった脱水ケーキ
Ｋを、ホットプレスにより従来と同様に加熱圧縮成形し
た場合の電力量は、概ね成形品１ｋｇ当たり４〜６ｋＷ
ｈ程度と大幅に節減でき、前工程において電気浸透脱水
を併用したことによる電力消費量の増加を考慮しても、
トータル的な電力消費量を低く抑えることができること
が確認できた。According to the test conducted by the present inventors,
The amount of electric power when the dewatered cake K having a water concentration of about 50% is heated and compression-molded by a hot press, as described in the section of the prior art, is about 10 / kg of the molded product.
Although it was about kWh, the combined use of electroosmotic dehydration and mechanical dehydration called squeezing / suctioning in the previous process allowed the dewatered cake K, which had a water concentration of 35 to 45%, to be replaced with a conventional one by hot pressing. Similarly, the electric energy in the case of heat compression molding is approximately 4 to 6 kW per kg of the molded product.
h can be greatly reduced, and considering the increase in power consumption due to the combined use of electroosmotic dehydration in the previous process,
It was confirmed that the total power consumption can be kept low.
【００２６】以上、本発明にかかる繊維パネルの製造方
法の実施の形態を説明したが、本発明は既述の実施の形
態に限定されるものではなく、本発明の技術的思想の範
囲内において、種々の変形及び変更が可能である。The embodiment of the method for manufacturing a fiber panel according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and is within the scope of the technical idea of the present invention. Various modifications and changes are possible.
【００２７】例えば、上記実施の形態においては、型枠
５０としてバッチ式のものを使用したが、型枠５０を構
成する多孔性キャリアを、ベルト状或いはホイール状の
ものとすることにより、本発明にかかる各工程を連続的
に受けるように可動させたものとしても良い。For example, in the above embodiment, a batch-type mold is used as the mold 50. However, the present invention is applicable to a case where the porous carrier constituting the mold 50 is formed in a belt shape or a wheel shape. May be moved so as to continuously receive the respective steps.
【００２８】また、上記実施の形態においては、繊維含
有スラリーＳの脱水工程において使用するプレス用平盤
と、脱水ケーキＫの加熱圧縮成形工程において使用する
プレス用平盤とを、別異のものとして記載したが、同一
のものを併用しても良く、またその場合には、プレスの
型締めを行ったまま、脱水工程と、その後の加熱圧縮成
形工程とを連続的に行っても良い。In the above embodiment, the press flat plate used in the dewatering step of the fiber-containing slurry S and the press flat plate used in the heat compression molding step of the dewatered cake K are different from each other. However, the same one may be used in combination, and in that case, the dewatering step and the subsequent heat compression molding step may be performed continuously while the press is clamped.
【００２９】[0029]
【発明の効果】以上、説明した本発明にかかる繊維パネ
ルの製造方法は、加熱圧縮成形工程前に、繊維含有スラ
リーを、電気浸透脱水と圧搾・吸引と言う機械的脱水と
を併用することによって、水分濃度３５〜４５％の脱水
ケーキにまで脱水することに最大の特徴があり、これに
よって加熱圧縮成形工程における電力消費量を大幅に節
減でき、安価に開口セル格子を有する繊維パネルを製造
できる効果がある。As described above, the method for producing a fiber panel according to the present invention as described above is characterized in that the fiber-containing slurry is subjected to a combination of electroosmotic dehydration and mechanical dehydration called squeezing / suction before the heat compression molding step. The most characteristic feature is that dewatering is performed to a dewatered cake having a water concentration of 35 to 45%. This makes it possible to greatly reduce the power consumption in the heat compression molding process and to manufacture a fiber panel having an open cell grid at low cost. effective.
【図１】本発明にかかる繊維パネルの製造工程中、繊維
含有スラリーの打設工程の一実施の形態を示した概念図
である。FIG. 1 is a conceptual diagram showing one embodiment of a fiber-containing slurry casting step in a fiber panel manufacturing process according to the present invention.
【図２】本発明にかかる繊維パネルの製造工程中、繊維
含有スラリーの脱水工程の一実施の形態を示した概念図
である。FIG. 2 is a conceptual view showing one embodiment of a fiber-containing slurry dewatering step in a fiber panel manufacturing process according to the present invention.
【図３】本発明にかかる繊維パネルの製造工程中、脱水
ケーキの加熱圧縮成形工程の一実施の形態を示した概念
図である。FIG. 3 is a conceptual diagram showing one embodiment of a heating and compression molding step of a dehydrated cake in a fiber panel manufacturing process according to the present invention.
【図４】繊維パネルの製造に使用される型枠の一実施の
形態を示した斜視図である。FIG. 4 is a perspective view showing an embodiment of a mold used for manufacturing a fiber panel.
【図５】原料の加熱圧縮成形工程中における状態を示し
た断面図である。FIG. 5 is a cross-sectional view showing a state during a heat compression molding step of a raw material.
【図６】成形品である繊維パネルを示した斜視図であ
る。FIG. 6 is a perspective view showing a fiber panel as a molded product.
【図７】従来の繊維パネルの製造工程を示した図であっ
て、（ａ）は原料スラリーの製造工程、（ｂ）は型枠上
への原料の打設工程、（ｃ）は原料の脱水工程を各々示
した図である。7A and 7B are diagrams showing a conventional process of manufacturing a fiber panel, wherein FIG. 7A shows a process of manufacturing a raw material slurry, FIG. 7B shows a process of placing a raw material on a mold, and FIG. It is the figure which showed each dehydration process.
【図８】従来の繊維パネルの製造工程を示した図であっ
て、（ａ）は原料の加熱圧縮成形工程、（ｂ）は製品の
型枠からの剥離工程を各々示した図である。8A and 8B are diagrams showing a conventional fiber panel manufacturing process, in which FIG. 8A shows a heating and compression molding process of a raw material, and FIG. 8B shows a process of separating a product from a mold.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2E162 CE00 4F100 AJ04 BA01 DB09 DC01A DC15A DG02A DH00A EH312 EJ202 EJ242 EJ422 EJ462 EJ612 GB07 JK01 JL02 JL03 JL16 JM10A 4L055 BF02 BF03 EA13 FA21 GA24 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E162 CE00 4F100 AJ04 BA01 DB09 DC01A DC15A DG02A DH00A EH312 EJ202 EJ242 EJ422 EJ462 EJ612 GB07 JK01 JL02 JL03 JL16 JM10A 4L055 BF02 BF03 EA13 FA21 GA24
Claims (3)
板面に幾何学的に配置固定された複数のエラストマーパ
ッドとから構成された型枠を使用し、複数のリブにより
構成される開口セル格子と、該格子の一方の開口部を覆
う連続的な平板と、他方の開口部の一部を覆うフランジ
とが、緻密な圧縮繊維により一体成形された構造の繊維
パネルを製造する方法において、上記型枠上に繊維含有
スラリーを打設する工程と、前記型枠上に打設された繊
維含有スラリーを、型枠の上・下方向からの平盤による
プレス及び型枠の下面からの吸引によって圧搾・吸引脱
水すると共に、上記プレス用平盤間に直流電圧を印加し
て繊維含有スラリーを電気浸透脱水し、水分濃度３５〜
４５％の脱水ケーキとする工程と、前記型枠上の脱水ケ
ーキを加熱圧縮成形し、水分濃度１０％以下の成形品と
する工程とから成ることを特徴とする、繊維パネルの製
造方法。1. An open cell constituted by a plurality of ribs using a mold comprising a porous carrier and a plurality of elastomer pads geometrically arranged and fixed on the plate surface of the porous carrier. Grating, a continuous flat plate covering one opening of the grating, and a flange covering a part of the other opening, in a method of manufacturing a fiber panel having a structure integrally formed by dense compressed fibers, A step of casting the fiber-containing slurry on the mold, and pressing the fiber-containing slurry cast on the mold by a flat plate from above and below the mold and suction from the lower surface of the mold. Squeezing and suction dewatering, and applying a DC voltage between the press flat plates to electro-osmotically dewater the fiber-containing slurry to obtain a water concentration of 35 to
A method for producing a fiber panel, comprising: a step of forming a 45% dewatered cake; and a step of heating and compressing the dewatered cake on the mold to form a molded article having a water concentration of 10% or less.
る工程が、水分濃度６５〜８０％の繊維含有スラリー
を、型枠の下面から吸引しながら打設するものであるこ
とを特徴とする、請求項１記載の繊維パネルの製造方
法。2. The step of casting the fiber-containing slurry on the mold, wherein the fiber-containing slurry having a water content of 65 to 80% is poured while being sucked from the lower surface of the mold. The method for producing a fiber panel according to claim 1, wherein
する工程が、型枠の上・下方向からの平盤によるプレス
下において、前記プレス用平盤間に高周波電圧を印加し
て脱水ケーキを高周波誘電加熱するものであることを特
徴とする、請求項１又は２記載の繊維パネルの製造方
法。3. The step of heating and compressing the dewatered cake on the mold by applying a high-frequency voltage between the press flat plates under a press by a flat plate from above and below the mold. 3. The method for producing a fiber panel according to claim 1, wherein the cake is subjected to high-frequency dielectric heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31528498A JP4031820B2 (en) | 1998-09-14 | 1998-09-14 | Manufacturing method of fiber panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31528498A JP4031820B2 (en) | 1998-09-14 | 1998-09-14 | Manufacturing method of fiber panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000096498A true JP2000096498A (en) | 2000-04-04 |
| JP4031820B2 JP4031820B2 (en) | 2008-01-09 |
Family
ID=18063558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31528498A Expired - Lifetime JP4031820B2 (en) | 1998-09-14 | 1998-09-14 | Manufacturing method of fiber panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4031820B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014519560A (en) * | 2011-05-13 | 2014-08-14 | ストラ エンソ オーワイジェイ | Process for treating microfibrillated cellulose and microfibrillated cellulose treated by the process |
| KR101500734B1 (en) * | 2007-06-27 | 2015-03-09 | 마에자와고교 가부시키가이샤 | Manufacture method of fiber panel and shaping mold of fiber panel |
| JP2017515702A (en) * | 2014-04-11 | 2017-06-15 | バイオニック アルファ アーゲーＢｉｏｎｉｃ Ａｌｐｈａ Ａｇ | Light weight building element, method for producing and using the same, light weight panel and heat insulating material |
-
1998
- 1998-09-14 JP JP31528498A patent/JP4031820B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101500734B1 (en) * | 2007-06-27 | 2015-03-09 | 마에자와고교 가부시키가이샤 | Manufacture method of fiber panel and shaping mold of fiber panel |
| JP2014519560A (en) * | 2011-05-13 | 2014-08-14 | ストラ エンソ オーワイジェイ | Process for treating microfibrillated cellulose and microfibrillated cellulose treated by the process |
| US9447541B2 (en) | 2011-05-13 | 2016-09-20 | Stora Enso Oyj | Process for treating cellulose and cellulose treated according to the process |
| US9447540B2 (en) | 2011-05-13 | 2016-09-20 | Stora Enso Oyj | Process for treating microfibrillated cellulose and microfibrillated cellulose treated according to the process |
| JP2017515702A (en) * | 2014-04-11 | 2017-06-15 | バイオニック アルファ アーゲーＢｉｏｎｉｃ Ａｌｐｈａ Ａｇ | Light weight building element, method for producing and using the same, light weight panel and heat insulating material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4031820B2 (en) | 2008-01-09 |
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