JPS6137399B2 - - Google Patents
Info
- Publication number
- JPS6137399B2 JPS6137399B2 JP58184515A JP18451583A JPS6137399B2 JP S6137399 B2 JPS6137399 B2 JP S6137399B2 JP 58184515 A JP58184515 A JP 58184515A JP 18451583 A JP18451583 A JP 18451583A JP S6137399 B2 JPS6137399 B2 JP S6137399B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- belt
- felt
- area
- dewatering
- 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
- 230000018044 dehydration Effects 0.000 claims description 20
- 238000006297 dehydration reaction Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 31
- 208000005156 Dehydration Diseases 0.000 description 17
- 239000002356 single layer Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Paper (AREA)
Description
【発明の詳細な説明】
この発明は無端に循環走行し、供給された紙料
液の水分を網裏に過する抄網帯の予備脱水域の
前方に無端のフエルト帯を下から掛けた脱水ドラ
ムを配置し、抄網帯の予備脱水域の前方をフエル
ト帯の外に重ねて上記脱水ドラムに掛け、両帯が
脱水ドラムに掛かつている間に抄網帯のテンシヨ
ンと脱水ドラムの周面の曲率に基ずく面圧及び脱
水ドラムの回転速度に基ずく遠心力で両端間の紙
料を脱水し、その後抄造した湿紙をフエルト帯に
よつて次工程に搬送する抄紙装置に関する。Detailed Description of the Invention This invention is a dewatering method in which an endless felt belt is hung from below in front of a preliminary dehydration area of a paper web belt that circulates endlessly and passes water from the supplied paper stock liquid to the back of the web. Arrange the drum, overlap the front of the preliminary dehydration zone of the paper strip on the outside of the felt strip, and hang it on the dewatering drum. The present invention relates to a paper making device that dewaters the paper stock between both ends using surface pressure based on the curvature of the drum and centrifugal force based on the rotational speed of the dewatering drum, and then conveys the formed wet paper to the next process using a felt band.
この様な抄紙装置は単層抄き用或いは多層抄合
せ用として従来から公知（例えば特開昭50−
5608、同51−11904、同52−14408、特公昭53−
17685各公報）であり、単層抄きの場合に無端フ
エルト帯は抄造した単層の湿紙をドライパートに
搬送し、多層抄合せの場合は第１段から最終段な
抄造装置が個々に抄造する湿紙を重ね集めてドラ
イパートに搬送する。 Such paper making equipment has been known for a long time for single-layer paper making or multi-layer paper making (for example, Japanese Patent Application Laid-Open No.
5608, 51-11904, 52-14408, Special Publication 53-
17685 publications), in the case of single-layer papermaking, the endless felt band conveys the single-layer paper-made wet paper to the dry part, and in the case of multi-layer papermaking, the paper-making devices from the first stage to the final stage are individually conveyed. Wet paper to be made into paper is collected in layers and transported to the dry part.
さて従来の装置は、第１，２図に示す様に脱水
ドラム１の周面下端１′と抄網帯２の予備脱水域
２ａの前方はほゞ同レベルにあり、抄網帯は上記
脱水ドラムの周面下端１′に向かいほゞ直進し、
脱水ドラムに下から掛つているフエルト帯３の外
に重なり、そこから脱水ドラムに一緒に掛かつて
走行し、脱水ドラムに掛つている間、抄網帯を緊
張するテンシヨンと、脱水ドラムの半径ないし曲
率とにより定まる面圧、及び抄網帯の走行速度に
より定まる脱水ドラムの回転速度で生起する遠心
力とで抄網帯とフエルト帯の間に挟まれた単層或
いは複数層の紙層を脱水する様になつているが、
しかし、これには次の様な問題点がある。 Now, in the conventional apparatus, as shown in Figs. 1 and 2, the lower end 1' of the circumferential surface of the dewatering drum 1 and the front of the preliminary dewatering area 2a of the paper-weaving zone 2 are at approximately the same level, and the paper-weaving zone is located at the same level as the Go almost straight toward the lower end 1' of the drum circumference,
It overlaps the outside of the felt band 3 that hangs on the dewatering drum from below, and runs from there to the dewatering drum together, and tensions the felt band while it is hanging on the dewatering drum, and the The single or multiple paper layers sandwiched between the paper strip and the felt strip are dehydrated using surface pressure determined by the curvature and centrifugal force generated by the rotational speed of the dewatering drum determined by the running speed of the paper strip. Although it is becoming like that,
However, this has the following problems.
先ずフローボツクスなどの紙料液供給装置４で
抄網帯上に噴出した紙料液は予備脱水域２ａで網
裏にあるサイフオン式の吸引箱５などによつて水
分を予備脱水され、紙料はほゞ紙層を形成した下
層６と、まだ流動状態の上層７となり、フエルト
帯３の外面に重なる際に流動状態の上層７は抄網
帯の両側縁から外に横溢し、抄造した場合、紙層
に厚薄が生じる。 First, the paper stock liquid spouted onto the paper web by a paper stock liquid supply device 4 such as a flow box is pre-dehydrated in a preliminary dehydration zone 2a by a siphon-type suction box 5 located behind the screen, and then the paper stock is The lower layer 6 forms a paper layer, and the upper layer 7 is still in a fluid state. When overlapping the outer surface of the felt band 3, the fluid upper layer 7 overflows from both sides of the paper-making belt. , the paper layer becomes thick and thin.
又、多層抄合せの場合、第２段以降の抄造装置
ではフエルト帯の外面には前段の抄造装置で抄造
された湿紙８が付着しているが、上述の流動状態
の上層７がフエルト帯外面の湿紙８に鋭角状に衝
突することによつて前段の湿紙８の地合は破壊さ
れると共に、衝突の際に生じる渦流により気泡を
巻込み前段の湿紙８と次段の湿紙の上層とが層間
剥離を起し易く、抄合せが不充分になる。 In addition, in the case of multi-layer papermaking, the wet paper 8 produced by the previous stage paper-making machine is attached to the outer surface of the felt band in the second-stage and subsequent paper-making machines; By colliding with the wet paper paper 8 on the outer surface at an acute angle, the formation of the wet paper paper 8 in the previous stage is destroyed, and the vortex generated at the time of collision entrains air bubbles, causing the wet paper paper 8 in the previous stage and the wet paper paper 8 in the next stage to Layer separation from the upper layer of paper is likely to occur, resulting in insufficient lamination.
更に多層抄合せの場合、脱水ドラムに通水性周
面のものを用い、ドラム内部に脱水した水の一部
を排水する様にすると、ドラム内に排水して溜る
水９によりフエルト帯の外面に付着している前段
の湿紙はフエルト帯の外面から剥れてずれ落ちる
部分８′を生じ、ヨレ等の問題を起すことがあ
る。 Furthermore, in the case of multi-layer papermaking, if a dewatering drum with a water-permeable surface is used so that some of the dehydrated water is drained inside the drum, the water 9 that drains and accumulates inside the drum will cause the outer surface of the felt band to become The attached wet paper in the previous stage may peel off from the outer surface of the felt band and cause a portion 8' to fall off, causing problems such as twisting.
そして、これ等の問題は抄造する湿紙が坪量約
50ｇ/m2程度以下の比較的薄い単層抄きの場合は
比較的に少ないが、多層抄合せの場合、或いは坪
量50ｇ/m2以上の単層抄きの場合に顕著である。 The problem with these problems is that the wet paper used for papermaking has a basis weight of approximately
This is relatively rare in the case of a relatively thin single-layer paper of about 50 g/m 2 or less, but it is noticeable in the case of a multi-layer paper or a single-layer paper with a basis weight of 50 g/m 2 or more.
又、これを解消するために予備脱水域からフエ
ルト帯の外面に重なる部分までを前下りに傾斜さ
せても抄網帯の走行速度、フローボツクスなどの
スライス口からの紙料液の噴出速度、上下の層の
重量、重力慣性等により抄造した湿紙には波状の
厚薄が生じ改善できない。 In addition, in order to solve this problem, even if the area from the preliminary dehydration area to the part that overlaps the outer surface of the felt band is tilted forward and downward, the running speed of the paper web band, the spouting speed of paper stock liquid from the slicing opening of a flow box, etc. Due to the weight of the upper and lower layers, gravitational inertia, etc., the wet paper produced becomes wavy and thin, which cannot be improved.
そこで本発明は脱水ドラムのすぐ手前に周面上
端が予備脱水域とほゞ同レベルの誘導ロールを設
けると共に脱水ドラムの周面下端を予備脱水域よ
り下げることによつて誘導ロールからフエルト帯
の外面に重なるまでの抄網帯の進入域を前下がり
に傾斜させ、上記進入域とフエルト帯外面との間
に進入域上の紙料から滲出した水分を貯える斜下
向きの楔形空間を形成をすることによつて上述の
問題点を解消したのである。 Therefore, the present invention provides a guide roll immediately before the dewatering drum, the upper end of which is at the same level as the preliminary dehydration area, and also lowers the lower end of the dewatering drum's circumferential surface below the preliminary dehydration area so that the felt strip can be removed from the guide roll. The entry area of the felt belt is tilted forward and downward until it overlaps with the outer surface, and an obliquely downward wedge-shaped space is formed between the entry area and the outer surface of the felt band to store moisture exuded from the stock on the entry area. In this way, the above-mentioned problems were solved.
第３図は本発明を実施した多層抄合せ装置の一
部の側面図、第４図は同じく単層抄紙装置の全体
の側面図、第５図は上記両装置にとつて共通な要
部の拡大断面図であつて、１０は誘導ロールを示
す。 FIG. 3 is a side view of a part of a multi-layer paper machine embodying the present invention, FIG. 4 is a side view of the entire single-layer paper machine, and FIG. It is an enlarged sectional view, and 10 shows a guide roll.
本発明によれば前述した様に脱水ドラム１のす
ぐ手前に離して配置された誘導ロール１０の周面
上端１０′は抄網帯の予備脱水域２ａと同レベル
にあつてブレストロール１１から誘導ロール１０
までの予備脱水域はほゞ水平である。そして、脱
水ドラム１の周面下端１′は予備脱水域２ａより
も少し低く、これにより誘導ロール１０から脱水
ドラムにかゝつたフエルト帯の外に重なるまでの
抄網帯の進入域２ｂは前下りに傾斜する。この進
入域２ｂの水平に対する進入角は最大で約30゜、
通常は20゜前後とする。又、フエルト帯が前下り
に傾斜して脱水ドラム１にかゝるための水平に対
する進入角は最大で45゜、通常は25゜前後である
ことが好ましい。 According to the present invention, as described above, the upper end 10' of the circumferential surface of the guide roll 10, which is placed apart immediately in front of the dewatering drum 1, is at the same level as the preliminary dewatering area 2a of the paper belt, and is guided from the breast roll 11. roll 10
The preliminary dewatering area up to this point is almost horizontal. The lower end 1' of the circumferential surface of the dewatering drum 1 is a little lower than the preliminary dewatering zone 2a, so that the entrance area 2b of the paper web belt from the guide roll 10 until it overlaps with the outside of the felt belt around the dewatering drum is at the front. slope downward. The approach angle of this approach area 2b with respect to the horizontal is about 30° at maximum,
Normally it is around 20°. Further, the angle of approach of the felt band from the horizontal to the dewatering drum 1 while tilting forward and downward is preferably 45 degrees at maximum, and usually about 25 degrees.
これによつて、抄網帯の進入域２ｂは従来の様
に脱水ドラムの周面下端１′ではなく、それより
も手前の１″点でフエルト帯３の外に重なり、進
入域２ｂ上には予備脱水域でほゞ脱水されて紙層
を形成した下層６と、まだ流動状態の上層７から
なる紙料が乗つてフエルト帯の外面に重なるため
単層抄き或いは多層抄合せの第１段抄造装置の場
合は、重なる際の挟圧で上層７は搾られて水分を
フエルト帯外面と上層７の間の斜下向きの楔形空
間中に貯え、又、多層抄合せの第２段以降の抄造
装置の場合はフエルト帯外面に付着した前段の湿
紙８と上層７の間の斜下向きの楔形空間中に同様
に水分を貯え、ピツト１２を形成する。 As a result, the entrance area 2b of the paper strip is not at the lower end 1' of the circumferential surface of the dewatering drum as in the conventional case, but overlaps with the outside of the felt belt 3 at a point 1'' in front of it, and is placed on the entrance area 2b. The paper stock consisting of the lower layer 6 which has been almost dehydrated in the pre-dehydration area to form a paper layer and the upper layer 7 which is still in a fluid state is placed on the outer surface of the felt band, so it is the first stage of single-layer papermaking or multi-layer papermaking. In the case of a multi-layer paper making device, the upper layer 7 is squeezed by the squeezing pressure at the time of overlapping, and water is stored in the downward wedge-shaped space between the outer surface of the felt band and the upper layer 7. In the case of a paper-making device, moisture is similarly stored in a downward wedge-shaped space between the wet paper web 8 of the previous stage attached to the outer surface of the felt band and the upper layer 7, thereby forming a pit 12.
そして、上層７は下層６と、ピツト１２中の水
分を介してフエルト帯３又はその外面の湿紙８と
の間に徐々に挟圧されるため抄網帯の両側縁から
横溢することなく吸込まれる様にしてスムースに
入り込んで行くと共に、フエルト帯の外面に前段
の湿紙８が付着している場合（多層抄合せの第２
段以降の抄造装置）にこの湿紙の地合が破壊され
ることが無い。 The upper layer 7 is gradually compressed between the lower layer 6 and the felt band 3 or the wet paper 8 on the outer surface of the felt band 3 through the moisture in the pit 12, so that the upper layer 7 is sucked in without overflowing from both side edges of the felt band. If the wet paper 8 of the previous stage is attached to the outer surface of the felt band (the second stage of multi-layer paper making)
The formation of this wet paper is not destroyed by the paper-making equipment after the stage.
又、前述の様に抄網帯の進入域２ｂは脱水ドラ
ムの周面下端よりも手前の１″点でフエルト帯３
の外に重なり、ピツト１２は水で貯えているた
め、脱水ドラムに通水性周面のものを使用し、水
の一部をドラム内に脱水しても、ドラム内の水９
でフエルト帯外面から湿紙がずれ落ちることも無
くなる。 In addition, as mentioned above, the entry area 2b of the felt belt 3 is located at a point 1" in front of the lower end of the peripheral surface of the dewatering drum.
Since the pit 12 stores water, even if a dehydration drum with a water-permeable surface is used and some of the water is dehydrated inside the drum, the water inside the drum 9
This prevents the wet paper from slipping off the outer surface of the felt band.
更に、誘導ロール１０に掛つた抄網帯が誘導ロ
ールから離れる際、抄網帯の下面に真空が生じ、
その負圧による吸引効果で脱水は更に促進すると
共に、水の充満したピツト１２があるため空気を
巻込むことがなく、多層抄合せの場合に層間剥離
を生じない。 Furthermore, when the paper strip hanging on the guide roll 10 separates from the guide roll, a vacuum is created on the lower surface of the paper strip.
The suction effect of the negative pressure further accelerates dehydration, and since there is a pit 12 filled with water, air is not drawn in, and delamination does not occur in the case of multilayer papermaking.
こうして本発明によれば予備脱水域２ａで予備
脱水した紙料を抄網帯２とフエルト帯３の間に挟
み、従来の様な問題を生じることなく抄網帯２の
テンシヨンで脱水ドラム１の周面に押付け、抄網
帯のテンシヨンと脱水ドラムの周面の曲率に基ず
く面圧並びに脱水ドラムの回転速度に基ずく遠心
力によつて強力に２次脱水することができ、こう
して２次脱水後、抄網帯を内側にして抄網帯とフ
エルト帯をクーチロール１３に折り返し状に掛
け、こゝで３次脱水後に抄網帯とフエルト帯を別
れさせ、脱水した紙層を次の工程に搬送すること
ができる。 In this way, according to the present invention, the paper stock pre-dehydrated in the pre-dehydration area 2a is sandwiched between the paper web belt 2 and the felt belt 3, and the tension of the paper web belt 2 is used to remove the paper stock from the dewatering drum 1 without causing the problems as in the conventional method. Strong secondary dewatering can be performed by pressing against the peripheral surface and by the surface pressure based on the tension of the paper belt and the curvature of the peripheral surface of the dewatering drum, as well as the centrifugal force based on the rotational speed of the dewatering drum. After dewatering, the paper web belt and felt belt are folded over the couch roll 13 with the paper web belt inside, and after the tertiary dehydration, the paper web belt and felt belt are separated, and the dehydrated paper layer is transferred to the next process. can be transported to
尚、抄網帯とフエルト帯が脱水ドラム１の周面
に掛かつて２次脱水を行う区間に脱水ドラムと外
接状に一つ或いは複数のニツプロール１４を配置
し、両帯２，３をその外接部に通過させることに
より脱水ドラムとニツプロールの線圧による脱水
を２次脱水中に加味してもよい。 In addition, one or more nip rolls 14 are arranged in a circumscribed manner with the dehydration drum in the section where the paper mesh belt and the felt belt are wrapped around the peripheral surface of the dehydration drum 1 and the secondary dewatering is performed, and both belts 2 and 3 are placed in the circumference of the dewatering drum. Dehydration due to the linear pressure between the dehydration drum and Nipprol may be added to the secondary dehydration by passing through the secondary dehydration.
そして、脱水ドラム１は単層抄きで、坪量50
ｇ/m2以下の薄い紙層を抄造する場合は周面が非
通水性のプレーンロールを使用し、単層抄きで、
坪量50ｇ/m2以上の場合、及び多層抄合せの場合
は周面が通水性のものを使用し、誘導ロール１０
は外周に溝などを有さないプレーンロール又は軸
方向に間隔を保つた多数の環状溝を外周に有する
グルーブドロールを使用する。 The dewatering drum 1 is made of single-layer paper, and has a basis weight of 50
When making a thin paper layer of g/ m2 or less, use a plain roll with a water-impermeable peripheral surface and make a single layer.
If the basis weight is 50g/m2 or more , or if multi-layer paper is to be assembled, use a material with a water-permeable peripheral surface, and use a guide roll of 10
A plain roll having no grooves on the outer periphery or a grooved roll having a large number of annular grooves at intervals in the axial direction on the outer periphery are used.
第１図は従来の抄紙装置の側面図、第２図は同
上の一部の拡大断面図、第３図と第４図は本発明
を実施した抄紙装置の二例の側面図、第５図は同
上の要部の拡大断面図で、図中、１は脱水ドラ
ム、２は抄網帯、２ａはその予備脱水域、２ｂは
同じく進入域、３はフエルト帯、５は予備脱水用
の吸引箱、１０は誘導ロールを示す。
Figure 1 is a side view of a conventional paper machine, Figure 2 is an enlarged cross-sectional view of a part of the same, Figures 3 and 4 are side views of two examples of paper machines embodying the present invention, and Figure 5. is an enlarged cross-sectional view of the main parts of the same as above, in which 1 is the dewatering drum, 2 is the paper belt, 2a is the preliminary dewatering area, 2b is the entry area, 3 is the felt zone, and 5 is the suction for preliminary dewatering. Box 10 indicates the guiding roll.
Claims (1)
に過する抄網帯の予備脱水域の前方に無端のフ
エルト帯を下から掛けた脱水ドラムを配置し、抄
網帯の予備脱水域前方の進入域をフエルト帯の外
に下から重ねて上記脱水ドラムに掛け、両帯が脱
水ドラムに掛かつている間に抄網帯のテンシヨン
と、脱水ドラムの周面の曲率に基づく面圧、及び
脱水ドラムの回転速度に基づく遠心力で両帯間の
紙料を脱水し、その後抄造した湿紙をフエルト帯
により次工程に搬送する抄紙装置において、 脱水ドラムのすぐ手前に周面上端が予備脱水域
とほゞ同レベルの誘導ロールを設けると共に、脱
水ドラムの周面下端を予備脱水域より下げ、これ
により上記誘導ロールからフエルト帯の外面に重
なる前記抄紙帯の進入域を前下りに傾斜させ、上
記進入域とフエルト帯外面との間に進入域上の紙
料から滲出した水分を貯える斜下向きの楔形空間
を形成したことを特徴とする抄紙装置。[Scope of Claims] 1. A dewatering drum with an endless felt belt hung from below is disposed in front of a preliminary dehydration area of a paper web belt that circulates endlessly and passes the supplied stock liquid through the back of the web, Lay the entrance area in front of the preliminary dewatering area of the paper web belt from below on the outside of the felt belt and hang it on the dewatering drum. In a papermaking machine that dewaters the paper stock between both bands using a surface pressure based on the curvature of A guide roll is provided at the front, the upper end of the circumferential surface of which is approximately at the same level as the preliminary dehydration zone, and the lower end of the circumferential surface of the dewatering drum is lowered from the preliminary dehydration zone, thereby allowing the paper-making belt that overlaps the outer surface of the felt belt to be drawn from the guide roll. A paper making apparatus characterized in that an entry area is inclined forward and downward, and an obliquely downward wedge-shaped space is formed between the entry area and the outer surface of the felt band to store moisture exuded from the paper stock on the entry area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18451583A JPS6081394A (en) | 1983-10-04 | 1983-10-04 | Papermaking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18451583A JPS6081394A (en) | 1983-10-04 | 1983-10-04 | Papermaking apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6081394A JPS6081394A (en) | 1985-05-09 |
| JPS6137399B2 true JPS6137399B2 (en) | 1986-08-23 |
Family
ID=16154541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18451583A Granted JPS6081394A (en) | 1983-10-04 | 1983-10-04 | Papermaking apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6081394A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3749814B1 (en) | 2018-02-09 | 2024-01-03 | Conxtech, Inc. | Full moment connection collar systems |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57117692A (en) * | 1980-11-26 | 1982-07-22 | Escher Wyss Gmbh | Papermaking machine |
-
1983
- 1983-10-04 JP JP18451583A patent/JPS6081394A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57117692A (en) * | 1980-11-26 | 1982-07-22 | Escher Wyss Gmbh | Papermaking machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6081394A (en) | 1985-05-09 |
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