JP3178498B2 - Paper thickness control device of paper machine - Google Patents
Paper thickness control device of paper machineInfo
- Publication number
- JP3178498B2 JP3178498B2 JP14907794A JP14907794A JP3178498B2 JP 3178498 B2 JP3178498 B2 JP 3178498B2 JP 14907794 A JP14907794 A JP 14907794A JP 14907794 A JP14907794 A JP 14907794A JP 3178498 B2 JP3178498 B2 JP 3178498B2
- Authority
- JP
- Japan
- Prior art keywords
- basis weight
- meter
- paper
- reel
- thickness
- 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.)
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Description
【0001】[0001]
【産業上の利用分野】本発明は塗工機で抄かれる紙の厚
さを制御する紙厚制御装置に係り、特に紙厚を調整する
カレンダを制御ループから除外している簡易計装型抄紙
機にもちいて好適な改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper thickness control device for controlling the thickness of paper made by a coating machine, and more particularly to a simple instrumented papermaking machine in which a calendar for adjusting the paper thickness is excluded from a control loop. It relates to an improvement that is suitable for a machine.
【0002】[0002]
【従来の技術】抄紙機の紙厚制御装置は、例えば本出願
人の提案にかかる特開昭59−228096号公報(エ
アーノズルよりエアーを吹きつけて紙厚プロフィールを
制御するもの)、特開昭63−120191号公報(分
配係数を自動的に決定できる厚さのプロフィール制御装
置)、特開平3−8885号公報(ファジールールを用
いてスライスリップの開度制御を行って、プロフィル制
御をするもの)、特開平5−195480号公報(水分
率プロセスと紙厚制御プロセスとを非干渉化して紙厚プ
ロフィールを制御するもの)等が知られている。2. Description of the Related Art A paper thickness control device of a paper machine is disclosed, for example, in Japanese Patent Application Laid-Open No. 59-228096 (which controls a paper thickness profile by blowing air from an air nozzle) proposed by the present applicant. Japanese Patent Application Laid-Open No. 63-201291 (profile control device of thickness capable of automatically determining a distribution coefficient) and Japanese Patent Application Laid-Open No. 3-8885 (profile control is performed by controlling the opening of a slice lip using a fuzzy rule). And Japanese Patent Application Laid-Open No. 5-195480 (which controls the paper thickness profile by making the moisture content process and the paper thickness control process non-interfering) and the like.
【0003】図4は抄紙機と塗工機がオンラインで結合
された抄紙プロセスに対する測定制御システムの構成ブ
ロック図である。図において、ウェットパート1は、パ
ルプ成分を含む白水が吐き出される領域で、合わせて重
力を用いた固液分離により大部分の水分が原紙より除去
される。プレスパート2は、ウェットパート1を通過し
た原紙を圧搾するローラが設けられたもので、メインド
ライヤパート3ではスチーム等により原紙を高温にして
残余の水分を取り除く。コータパート4は、いわゆる塗
工機であって、原紙の片面若しくは両面に塗工し、アフ
タドライヤパート6により、再びスチーム等による水分
の除去が行われる。カレンダ10は、二つのローラの間
を紙を通すことで紙厚を調整するもので、二つのローラ
の間隔はローラ自体を加熱・冷却して調整する。リール
パート8は、塗工終了後の原紙を巻き取る。種口弁9は
ウェットパート1に供給するパルプ成分の総量を調整す
る。スライスボルト(図示せず)は、ウェットパート1
の紙幅方向に設置されるもので、均一な坪量分布となる
ようにプロフィル制御をするのに用いる操作端である。FIG. 4 is a block diagram showing a configuration of a measurement control system for a papermaking process in which a papermaking machine and a coating machine are connected on-line. In the figure, a wet part 1 is a region where white water containing a pulp component is discharged, and most of the water is removed from the base paper by solid-liquid separation using gravity. The press part 2 is provided with rollers for squeezing the base paper that has passed through the wet part 1. In the main dryer part 3, the base paper is heated to a high temperature by steam or the like to remove residual moisture. The coater part 4 is a so-called coating machine, which coats one or both sides of the base paper, and the after-dryer part 6 removes water again by steam or the like. The calendar 10 adjusts the paper thickness by passing paper between two rollers, and the interval between the two rollers is adjusted by heating and cooling the rollers themselves. The reel part 8 winds up the base paper after the coating is completed. The seed port 9 adjusts the total amount of the pulp component supplied to the wet part 1. Slice bolt (not shown) is wet part 1
This is an operation end used for performing profile control so as to obtain a uniform basis weight distribution.
【0004】コータ前坪量計・水分計4は、抄紙機にお
ける抄紙の状態を検出する。コータ前絶乾坪量演算部1
1は、コータ前坪量計・水分計4の測定値からメインド
ライヤパート3を出た状態での絶乾坪量BD1を演算す
る。これにより抄紙プロセスで均一な坪量と水分率を有
する原紙が製造される。リール前坪量計・水分計・厚さ
計7は、リールパート8に巻き取る前の完成品に近い領
域での坪量や水分率並びに紙厚の紙幅方向の平均値が測
定される。リール前絶乾坪量演算部12は、リール前坪
量計・水分計・厚さ計7の水分率と坪量の測定値から塗
工後の絶乾坪量BD2を演算している。[0004] The basis weight meter / moisture meter 4 before the coater detects the state of papermaking in the papermaking machine. Absolute dry basis weight calculation unit 1 before coater
1 calculates the absolute dry basis weight BD 1 in a state where the main dryer part 3 is exited from the measured values of the basis weight meter / moisture meter 4 before the coater. As a result, a base paper having a uniform basis weight and moisture content is produced in the papermaking process. The grammage meter / moisture meter / thickness meter 7 on the reel measures the basis weight, the moisture content, and the average value of the paper thickness in the paper width direction in a region close to the finished product before winding on the reel part 8. Reel Before absolute Inuitsubo amount calculation unit 12 calculates the bone dry basis weight BD 2 after coating from the measured values of the reel before basis meters • moisture meter Thickness seven moisture content of the basis weight.
【0005】坪量制御部14は、絶乾坪量BDと設定値
BD0とを比較して、均一な坪量となるような、種口弁
9やスライスボルト(図示せず)の操作量を演算して、
制御出力を行う。坪量制御部14では、通常の坪量制御
では種口弁に近いコータ前絶乾坪量演算部11を用いて
制御を行い、コータ前絶乾坪量演算部11から演算値B
D1が得られないような時バックアップ用にリール前絶
乾坪量演算部12の演算値BD2を用いて制御する。坪
量制御部14の制御モードとしては、坪量測定値が目標
値にほぼ収束した定常状態に用いられる定常制御と、坪
量測定値が目標値に収束する前の過渡的状態に用いられ
る過渡状態制御とが併存している。The basis weight control unit 14 compares the absolute dry basis weight BD with the set value BD 0, and operates the seed opening valve 9 and the slice bolt (not shown) so as to obtain a uniform basis weight. And calculate
Performs control output. In the basis weight control unit 14, in the normal basis weight control, control is performed using the absolute dry basis weight calculating unit 11 before the coater which is close to the seed port valve.
D controlled using calculated value BD 2 reels before absolute Inuitsubo amount calculation unit 12 to 1 for Never backup time as obtained. The control modes of the basis weight control unit 14 include a steady state control used in a steady state in which the measured basis weight value substantially converges to the target value, and a transient control used in a transient state before the basis weight measured value converges to the target value. State control coexists.
【0006】塗工量演算部15は、コータ前絶乾坪量演
算部11とリール前絶乾坪量演算部12の演算値の偏差
ΔBD(=BD2−BD1)により、原紙に対する塗工量
を求めている。そして、手動制御の場合には、オペーレ
ータが設定値と塗工量とが一致するようにコーターパー
ト5のバルブを開閉している。厚さ制御部16は、リー
ル前坪量計・水分計・厚さ計7の紙厚測定値CLP1が
設定値CLP0と一致するように制御するもので、例え
ばカレンダ10の温度を上昇/下降させてローラの間隔
を調整している。The coating amount calculating section 15 calculates the coating amount on the base paper based on the deviation ΔBD (= BD 2 −BD 1 ) between the calculated values of the absolute dry basis weight calculating section 11 before the coater and the absolute dry basis weight calculating section 12 before the reel. Seeking quantity. In the case of manual control, the operator opens and closes the valve of the coater part 5 so that the set value and the coating amount match. The thickness control unit 16, which controls as the sheet thickness measuring value CLP 1 reel before basis meters • moisture meter Thickness gauge 7 matches the set value CLP 0, for example, raise the temperature of the calender 10 / It is lowered to adjust the roller spacing.
【発明が解決しようとする課題】しかし、抄紙プロセス
においてはカレンダ10を設置していない場合もあり、
或いはカレンダ10が存在していてもバルブの制御は手
動のみしかなく、上述した制御ループによる紙厚制御が
不可能な簡易計装型の抄紙機も存在している。このよう
な抄紙機であっても、紙厚が紙の品質指標として重要な
意味を持つ板紙を製造している場合には、紙厚制御を実
現したいという課題があった。本発明は上述の課題を解
決したもので、カレンダを用いた紙厚制御が不可能な簡
易計装型の抄紙機に対しても紙厚制御が出来、板紙の製
造に適した抄紙機の紙厚制御装置を提供することを目的
とする。However, the calendar 10 may not be installed in the paper making process.
Alternatively, even when the calendar 10 is present, there is only a manual control of the valve, and there is a simple instrumentation type paper machine in which the paper thickness cannot be controlled by the above-described control loop. Even in such a paper machine, there is a problem that it is desired to control the paper thickness when manufacturing a paperboard in which the paper thickness is important as a quality index of the paper. The present invention has solved the above-mentioned problem, and can control the paper thickness even for a simple instrumentation type paper machine that cannot control the paper thickness using a calendar. It is an object to provide a thickness control device.
【0007】[0007]
【課題を解決するための手段】上述の目的を達成するた
めの本発明の構成は,請求項1においては,白水の吐き
出されるウェットパート(1)と、このウェットパート
で固液分離された原紙を圧搾するプレスパート(2)
と、このプレスパートを通過した原紙を乾燥するメイン
ドライヤパート(3)と、この乾燥された原紙を巻き取
るリールパート(8)と、このウェットパートに供給す
るパルプの総量を調整する種口弁(9)を有する抄紙プ
ロセスに対して、リールパートの前に設けられたリール
前坪量計・水分計・厚み計(7)と、このリール前坪量
計・水分計の測定値からリール前の絶乾坪量(BD2)
を演算する手段(12)と、これらの演算された絶乾坪
量と設定された絶乾坪量(BD0)とを比較して、両者
の偏差が小さくなるように前記種口弁の開度を制御する
坪量制御部(14)と、前記リール前坪量計・水分計・
厚み計の紙厚測定値(CLP1)と、設定された紙厚
(CLP0)とを比較して偏差が小さくなるように前記
絶乾坪量(BD2)若しくは絶乾坪量(BD0)を増減す
る為の補正信号を前記坪量制御部に対して送る紙厚補正
部(17)を有することを特徴としている。According to a first aspect of the present invention, there is provided a wet part (1) for discharging white water and a base paper separated into solid and liquid by the wet part. Press to squeeze (2)
A main dryer part (3) for drying the base paper that has passed through the press part, a reel part (8) for winding the dried base paper, and a seed port valve for adjusting the total amount of pulp supplied to the wet part. For the paper making process having (9), the basis weight meter / moisture meter / thickness meter (7) provided before the reel part and the measured values of the basis weight meter / moisture meter Absolute dry basis weight (BD2)
(12), and the calculated absolute dry basis weight and the set absolute dry basis weight (BD0) are compared, and the opening of the seed port valve is reduced so that the deviation between them is reduced. Weight control unit (14) for controlling the weight, moisture meter,
The sheet thickness measurement value of the thickness gauge and (CLP1), so that the deviation by comparing the set sheet thickness (CLP0) decreases
Increase / decrease absolute dry basis weight (BD2) or absolute dry basis weight (BD0)
Is characterized by having a sheet thickness correction unit (17) for sending for a correction signal for that the basis weight controller.
【0008】[0008]
【作用】リール前坪量計・水分計・厚み計とリール前絶
乾坪量演算手段は、抄紙プロセスで製造される紙の絶乾
坪量を求めている。坪量制御部は、設定坪量と製造され
る紙の絶乾坪量との偏差を用いて、抄紙プロセスのフィ
ードバック制御を行う。リール前坪量計・水分計・厚み
計では、抄紙プロセスで製造される紙の紙厚を測定して
いるが、制御対象の抄紙プロセスには直接紙厚制御が可
能な操作端がない。そこで、坪量制御部に補正信号送る
紙厚補正部を設けて、間接的に紙厚制御を行っている。[Function] The basis weight meter / moisture meter / thickness meter before reel and the absolute dry basis weight calculation means before reel determine the absolute dry basis weight of the paper manufactured in the paper making process. The basis weight control unit performs feedback control of the paper making process using a deviation between the set basis weight and the absolute basis weight of the paper to be manufactured. The reel basis weight meter / moisture meter / thickness meter measures the paper thickness of the paper manufactured in the papermaking process, but the papermaking process to be controlled does not have an operation end capable of directly controlling the paper thickness. Therefore, a paper thickness correction unit for sending a correction signal is provided in the grammage control unit to control the paper thickness indirectly.
【0009】[0009]
【実施例】以下図面を用いて、本発明を説明する。図1
は本発明の一実施例を示す構成ブロック図で、塗工プロ
セスを有しない場合を示してある。なお、図1において
前記図4と同一作用をするものには同一符号を付して説
明を省略する。図において、カレンダ10はメインドラ
イヤパート3とリール前坪量計・水分計・厚み計7の間
に設けられたもので、手動での調整は可能であるが、弁
開度を調整する機械が装着されていないので、制御装置
により紙厚を直接制御することはできない。紙厚補正部
17は、リール前坪量計・水分計・厚み計7の紙厚測定
値CLP1と、設定された紙厚CLP0とを比較して偏差
が小さくなるように坪量制御部14に対して補正信号を
送る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG.
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, in which a coating process is not provided. In FIG. 1, components having the same functions as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted. In the figure, the calendar 10 which was provided between the main drying section 3 and the reel before basis meters • moisture meter Thickness meter 7, although it is possible manual adjustments, the machine to adjust the valve opening Since it is not mounted, the paper thickness cannot be directly controlled by the control device. The paper thickness correction unit 17 compares the paper thickness measurement value CLP1 of the pre-reel basis weight meter / moisture meter / thickness meter 7 with the set paper thickness CLP0, and makes the basis weight control unit 14 to reduce the deviation. A correction signal is sent to it.
【0010】図2は絶乾坪量BDと紙厚CLPとの関係
図である。絶乾坪量BDと紙厚CLPとの間には次式の
ような比例関係があり、比例定数kは紙の種類毎にほぼ
一定値になっている。 ΔBD/BD=k・(ΔCLP/CLP) (1)FIG. 2 is a diagram showing the relationship between the absolute dry basis weight BD and the paper thickness CLP. There is a proportional relationship between the absolutely dry basis weight BD and the paper thickness CLP as in the following equation, and the proportionality constant k is substantially constant for each type of paper. ΔBD / BD = k · (ΔCLP / CLP) (1)
【0011】そこで、坪量制御部14は受け取った補正
信号に応じて種口弁9に対する操作量MVを補正する。
この補正演算としては、坪量設定値BD0を増減した
り、或いはリール前絶乾坪量演算部12の演算した絶乾
坪量BD2を増減することが考えられる。すなわち、板
紙の場合は坪量よりも紙厚の方が品質指標として大切な
ので、紙厚を坪量に優先して設定値となるように制御し
ている。Therefore, the basis weight control unit 14 corrects the operation amount MV for the seed port valve 9 according to the received correction signal.
As the correction calculation, it is conceivable to increase or decrease the basis weight set value BD 0 or to increase or decrease the absolute dry basis weight BD 2 calculated by the absolute dry basis weight calculation unit 12 in front of the reel. That is, in the case of paperboard, since the paper thickness is more important as a quality index than the basis weight, the paper thickness is controlled to be a set value prior to the basis weight.
【0012】図3は本発明の第2の実施例を示す構成ブ
ロック図で、抄紙プロセスと塗工プロセスが連続して設
けられているものを示している。なお、図3において前
記図4と同一作用をするものには同一符号を付して説明
を省略する。図において、図4に存在したカレンダ10
が設けられていない。紙厚補正部17は、リール前坪量
計・水分計・厚み計7の紙厚測定値CLP1と、設定さ
れた紙厚CLP0とを比較して偏差が小さくなるように
坪量制御部14に対して補正信号を送る。坪量制御部1
4は受け取った補正信号に応じて種口弁9に対する操作
量MVを補正する。この補正演算としては、坪量設定値
BD0を増減したり、或いはコータ前絶乾坪量演算部1
1の演算した絶乾坪量BD1を増減することが考えられ
る。例えば設定紙厚CLP0が100μmで、紙厚測定
値CLP1が95μmの時は、紙厚を5%増大させる必
要がある。そこで、坪量設定値BD0を5%増大させる
か、或いは演算した絶乾坪量BD1を5%少なくするこ
とで、坪量制御を用いて紙厚制御が行える。FIG. 3 is a structural block diagram showing a second embodiment of the present invention, in which a paper making process and a coating process are provided continuously. In FIG. 3, components having the same functions as those in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted. In the figure, the calendar 10 existing in FIG.
Is not provided. Sheet thickness correction unit 17, the reel before and basis weight gauge, moisture meter, thickness meter 7 the sheet thickness measuring value CLP 1 of the set sheet thickness CLP 0 and grammage control unit so that the difference becomes smaller than the A correction signal is sent to. Basis weight control unit 1
4 corrects the operation amount MV for the seed port valve 9 according to the received correction signal. As this correction calculation, the basis weight set value BD 0 is increased or decreased, or the absolute dry basis weight calculation unit 1 before the coater is used.
It is conceivable to increase or decrease the absolute dry basis weight BD 1 calculated in step 1 . For example, when the set paper thickness CLP 0 is 100 μm and the measured paper thickness CLP 1 is 95 μm, it is necessary to increase the paper thickness by 5%. Therefore, either to increase the basis weight setting value BD 0 5%, or computed a bone dry basis weight BD 1 by 5% less, can be performed sheet thickness control using the basis weight control.
【0013】このように構成された装置の運転状態を説
明する。従来オペーレータが手動で制御していた状態で
は、紙厚のバラツキは5μmで、絶乾坪量のバラツキは
10g/m2であった。これに対して、紙厚制御を坪量
制御ループを用いて行う本発明を同一抄紙・塗工プロセ
スで実施したところ、紙厚のバラツキは2μmで、絶乾
坪量のバラツキは0.2 g/m2と格段に減少している。
尚、ここでバラツキとは測定値の標準偏差2σ値を言
う。An operation state of the apparatus having the above-described configuration will be described. Conventionally, when the operator manually controlled the paper thickness, the variation in the paper thickness was 5 μm, and the variation in the absolute dry basis weight was 10 g / m 2 . On the other hand, when the present invention in which the paper thickness control was performed using the basis weight control loop was carried out in the same paper making / coating process, the variation in the paper thickness was 2 μm, and the variation in the absolute dry basis weight was 0.2 g / m 2. It has decreased to 2 significantly.
Here, the variation means a standard deviation 2σ value of the measured value.
【0014】[0014]
【発明の効果】以上説明したように、本発明によれば抄
紙プロセスで紙厚制御を行う場合に、直接紙厚を制御す
ることが構造的に困難な場合であっても、坪量制御に対
する補正指令を行って間接的に紙厚制御ができるので、
製造される紙の品質が向上するという効果がある。As described above, according to the present invention, when controlling the paper thickness in the paper making process, even if it is structurally difficult to directly control the paper thickness, it is possible to control the basis weight control. Since the paper thickness can be controlled indirectly by issuing a correction command,
This has the effect of improving the quality of the paper produced.
【図1】本発明の一実施例を示す構成ブロック図であ
る。FIG. 1 is a configuration block diagram showing one embodiment of the present invention.
【図2】絶乾坪量BDと紙厚CLPとの関係図である。FIG. 2 is a diagram showing the relationship between the absolute dry basis weight BD and the paper thickness CLP.
【図3】本発明の第2の実施例を示す構成ブロック図で
ある。FIG. 3 is a configuration block diagram showing a second embodiment of the present invention.
【図4】従来の測定制御システムの構成ブロック図であ
る。FIG. 4 is a configuration block diagram of a conventional measurement control system.
4 コータ前坪量計・水分計 7 リール前坪量計・水分計 10 カレンダ 11 コータ前絶乾坪量演算手段 12 リール前絶乾坪量演算手段 14 坪量制御部 15 塗工量演算部 17 紙厚補正部 4 Weight meter / moisture meter before coater 7 Weight meter / moisture meter before reel 10 Calendar 11 Absolute dry basis weight calculating means before coater 12 Absolute dry basis weight calculating means before reel 14 Basis weight control unit 15 Coating amount calculating unit 17 Paper thickness correction unit
フロントページの続き (58)調査した分野(Int.Cl.7,DB名) D21F 7/06 D21F 1/06 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) D21F 7/06 D21F 1/06
Claims (2)
と、このウェットパートで固液分離された原紙を圧搾す
るプレスパート(2)と、このプレスパートを通過した
原紙を乾燥するメインドライヤパート(3)と、この乾
燥された原紙を巻き取るリールパート(8)と、このウ
ェットパートに供給するパルプの総量を調整する種口弁
(9)を有する抄紙プロセスに対して、リールパートの
前に設けられたリール前坪量計・水分計・厚み計(7)
と、このリール前坪量計・水分計の測定値からリール前
の絶乾坪量(BD2)を演算する手段(12)と、これ
らの演算された絶乾坪量と設定された絶乾坪量(BD
0)とを比較して、両者の偏差が小さくなるように前記
種口弁の開度を制御する坪量制御部(14)と、前記リ
ール前坪量計・水分計・厚み計の紙厚測定値(CLP
1)と、設定された紙厚(CLP0)とを比較して偏差が
小さくなるように前記絶乾坪量(BD2)若しくは絶乾
坪量(BD0)を増減する為の補正信号を前記坪量制御
部に対して送る紙厚補正部(17)を有することを特徴
とする抄紙機の紙厚制御装置。1. A wet part for discharging white water (1)
And a press part (2) for squeezing the base paper solid-liquid separated in the wet part, a main dryer part (3) for drying the base paper passing through the press part, and a reel part for winding the dried base paper. (8) and for a papermaking process having a seed opening valve (9) for adjusting the total amount of pulp supplied to the wet part, a reel weight meter, a moisture meter, and a thickness meter provided in front of the reel part. (7)
Means (12) for calculating the absolute dry basis weight (BD2) before the reel from the measured values of the basis weight meter / moisture meter before the reel, and the calculated absolute dry basis weight and the set absolute dry basis weight Quantity (BD
0), and a basis weight control unit (14) for controlling the opening of the seed port valve so as to reduce the deviation between the two, and the paper thickness of the basis weight meter / moisture meter / thickness meter of the reel. Measured value (CLP
1) and the set paper thickness (CLP0), so that the absolute dry basis weight (BD2) or absolute dry
Controlling the correction signal for increasing or decreasing the basis weight (BD0) to the basis weight
Sheet thickness control apparatus of a paper machine, characterized in that it has a sheet thickness correction unit to send for the part (17).
と、このウェットパートで固液分離された原紙を圧搾す
るプレスパート(2)と、このプレスパートを通過した
原紙を乾燥するメインドライヤパート(3)と、この乾
燥された原紙に塗工を施すコータパート(5)と、この
塗工された原紙を乾燥するアフタドライヤパート(6)
と、この乾燥された塗工済原紙を巻き取るリールパート
(8)と、このウェットパートに供給するパルプの総量
を調整する種口弁(9)を有する抄紙・塗工プロセスに
対して、このコータパートの前に設けられたコータ前坪
量計・水分計(4)と、このコータ前坪量計・水分計の
測定値からコータ前の絶乾坪量(BD1)を演算する手
段(11)と、リールパートの前に設けられたリール前
坪量計・水分計・厚み計(7)と、このリール前坪量計
・水分計の測定値からリール前の絶乾坪量(BD2)を
演算する手段(12)と、これらの演算された絶乾坪量
のいずれかと設定された絶乾坪量(BD0)とを比較し
て、両者の偏差が小さくなるように種口弁の開度を制御
する坪量制御部(14)と、前記リール前坪量計・水分
計・厚み計の紙厚測定値(CLP1)と、設定された紙
厚(CLP0)とを比較して偏差が小さくなるように前
記絶乾坪量(BD2)若しくは絶乾 坪量(BD0)を増減
する為の補正信号を前記坪量制御部に対して補正信号を
送る紙厚補正部(16)を有することを特徴とする抄紙
機の紙厚制御装置。2. A wet part for discharging white water (1).
And a press part (2) for squeezing the base paper solid-liquid separated in the wet part, a main dryer part (3) for drying the base paper passing through the press part, and coating the dried base paper. Coater part (5) and afterdryer part (6) for drying this coated base paper
And a reel part (8) for winding the dried coated base paper and a seed port valve (9) for adjusting the total amount of pulp supplied to the wet part. Means (11) for calculating the absolute dry basis weight (BD1) before the coater from the measured values of the basis weight meter / moisture meter (4) provided before the coater part and the measured values of the basis weight meter / moisture meter before the coater. ), The basis weight meter / moisture meter / thickness meter (7) provided in front of the reel part, and the absolute dry basis weight (BD2) in front of the reel from the measured values of the basis weight meter / moisture meter before reel. (12), and the calculated absolute dry basis weight
A basis weight control unit (14) that compares the set absolute dry basis weight (BD0) with the set absolute dry basis weight (BD0) and controls the opening of the seed opening valve so that the deviation between the two is reduced; sheet thickness measure of the amount meter & moisture meter thickness gauge (CLP1) and, set the paper thickness (CLP0) before so that the deviation becomes smaller than the
Kize' Inuitsubo amount (BD2) or bone dry basis weight of the (BD0) decrease
Sheet thickness control apparatus of a paper machine, characterized in that it has a sheet thickness correction unit for sending a correction signal to the correction signal for the basis weight controller (16) for.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14907794A JP3178498B2 (en) | 1994-06-30 | 1994-06-30 | Paper thickness control device of paper machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14907794A JP3178498B2 (en) | 1994-06-30 | 1994-06-30 | Paper thickness control device of paper machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0813376A JPH0813376A (en) | 1996-01-16 |
JP3178498B2 true JP3178498B2 (en) | 2001-06-18 |
Family
ID=15467194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14907794A Expired - Fee Related JP3178498B2 (en) | 1994-06-30 | 1994-06-30 | Paper thickness control device of paper machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3178498B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AR086593A1 (en) * | 2011-06-08 | 2014-01-08 | Akzo Nobel Chemicals Int Bv | PROCESS FOR THE PRODUCTION OF PAPER AND CARTON |
JP6481238B2 (en) * | 2015-07-02 | 2019-03-13 | デュプロ精工株式会社 | Paper machine |
JP7035325B2 (en) | 2017-03-22 | 2022-03-15 | セイコーエプソン株式会社 | Sheet manufacturing equipment, seats, and sheet manufacturing methods |
JP2019065407A (en) | 2017-09-28 | 2019-04-25 | セイコーエプソン株式会社 | Sheet production apparatus |
JP2022055780A (en) | 2020-09-29 | 2022-04-08 | セイコーエプソン株式会社 | Apparatus for producing sheet |
-
1994
- 1994-06-30 JP JP14907794A patent/JP3178498B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0813376A (en) | 1996-01-16 |
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