JPH0258109B2

JPH0258109B2 -

Info

Publication number: JPH0258109B2
Application number: JP55128727A
Authority: JP
Inventors: Kazumasa Watanabe; Mitsuo Yoshimura; Yoshiji Ishii; Kazuaki Tsubaki; Osamu Uchida; Osamu Takeuchi
Original assignee: Toppan Printing Co Ltd
Current assignee: Toppan Inc
Priority date: 1980-09-17
Filing date: 1980-09-17
Publication date: 1990-12-06
Also published as: JPS5753359A

Description

[Detailed description of the invention]

発明の目的本発明は帯状印刷物の印刷条件、例えば印刷物
の横幅、インキの塗布量の多少、印刷紙の材質の
差、印刷スピードの遅速に合せて乾燥装置からの
排気量を調節して印刷物の乾燥に要する燃料の節
減と排気フアンの節電を可能にした帯状印刷物の
乾燥方法に関する。従来技術およびその問題点一般に帯状印刷物の乾燥装置は印刷物の出口側
開口部から印刷物に伴なわれて、煙、すなわち、
印刷物からのインキ溶剤蒸気が漏れ出る。これは
工場内部を汚染し、作業者の健康に対し有害であ
る。そこで従来、乾燥装置に排気孔と排気フアン
を設け印刷機稼動中は上記排気フアンを作動させ
て、常に乾燥装置内を外部より負圧の状態に維持
すること、すなわち、印刷物の出入口側開口部、
特に出口側開口部から内部に新鮮な空気を吸入す
ることによつてインキ溶剤蒸気が外部に漏れるの
を防いでいる。従つてインキ溶剤蒸気が外部に漏
れるのを防止するためには排気フアンの排気量が
大きいことが望ましい。しかしながら、この種の
乾燥装置の場合、印刷物出入口側開口部より吸入
される新鮮な空気、すなわち、排気孔を経て排気
される空気の量に対応して導入される新鮮な空気
の加熱に必要な熱量が問題となり、燃料消費量は
上記の排気量に比例する。又排気量が多いと排気
フアンが消費する電力量も多い。そのためこのよ
うな熱量をできるだけ低減することが望ましい。一方、印刷紙の材質およびインキ塗布量等は印
刷の種類毎に変化する。印刷機の回転数、印刷紙
の材質およびインキ塗布量の変化にかかわらず、
乾燥機から常に一定量の排気を行なつたのでは、
きめ細かい乾燥を行なうことはできない。例えば
コート紙を使用し、インキ塗布量が少なく、かつ
印刷機の回転数が少ない場合と中質紙又はザラ紙
を使用し、インキ塗布量が多く、かつ印刷機の回
転数が高い場合とでは、溶剤等の発生量がまつた
く異なる。このような異なる条件のもとで、一定
の排気量を維持したのでは、いろいろと不都合な
事態が生ずる。例えば、発生する溶剤量に比べて
排気量が少ないと、乾燥室が溶剤で充満し、爆発
の危険性があると共に、印刷物が未乾燥のまま、
印刷機を出ていく恐れがある。又発生する溶剤量
に比べて排気量が多いと、燃料が無駄となる。特
に印刷の紙幅およびインキ塗布量、用紙の材質等
は特定な印刷を行なう場合には、印刷中は常に一
定である。しかし印刷機の回転数は常に一定では
なく、印刷開始時は当然のことながら印刷途中で
も様々に変化する。従つて、印刷機に付設の加熱
型乾燥装置内を通過する帯状印刷物の搬送速度も
様々に変化する。従来においては、印刷紙の幅、印刷紙の材質、
インキ塗布量、及び印刷機の速度等に対応して排
気量を調節して、燃料の節約、きめ細かい乾燥を
開口部の開口度合と排気量の増減により行なう方
法はまつたく知られていなかつた。発明の構成本発明は、排気孔および排気フアンを設けた帯
状印刷物の乾燥装置による乾燥において、印刷物
の乾燥装置への出入口側開口部の横方向の長さを
印刷物の横幅に合せて最小に調節し、かつ印刷機
の印刷中の回転数の変動による乾燥装置の排気量
の増減率を乾燥させる個々の帯状印刷物の紙質と
インキ塗布量とに対応して変化させ、印刷機の回
転数の変動に対応した乾燥を排気量の調節により
行なうことを特徴とする帯状印刷物の乾燥方法に
関する。発明の効果本発明では、印刷物の乾燥室への出入口を印刷
物の横幅に合わせて最小に調節し、乾燥室から排
出されるガス量をできるだけ最小限とし、燃料の
無駄をなくすことが本願発明の特徴の一つであ
る。さらに印刷中、印刷物の搬送速度の増減に合
せて、排気量を調節するのではなく、乾燥させる
個々の印刷物の紙質とインキ塗布量に対応して変
化させることによつてきめ細かい乾燥が可能とな
る。好ましい発明の態様図面により本発明を説明する。第１図は乾燥装
置の正面から見た概略図であり、第２図は側面図
で出入口側開口部の開口幅調節装置の設置状態を
特に示している。この装置の各部分は次のように
示される。この乾燥装置において印刷物は左方から右方に
移動し乾燥される。このときインキ溶剤蒸気を含
む排ガスは排気フアン７によつて排気されるとと
もに、新鮮な空気が開口部１１より内部に吸引さ
れ、そのインキ溶剤蒸気が印刷物出口側開口部１
１より外部に漏れるのが防止される。印刷物の出入口側開口部１１の横幅および排気
量は次のように調節される。第３図に示す設定板は紙幅による開口幅の調節
用に関するもので、第３図は印刷条件設定板を示
してある。この印刷条件設定板における紙幅の数
字、紙質およびインキ割合の「多」「普」「少」は
ボタンとなつており、印刷条件変更毎に作業者が
ボタンを押す。この紙幅のボタン、紙質およびイ
ンキ量のボタンの種類は増やしても良い。この印刷条件設定板からの各データーは制御装
置１０に送られ、印刷物の乾燥装置への開口部幅
可変用駆動モーター１２を駆動させ、駆動軸１５
を回転させ、案内軸１６上のダンパー板１１を動
かし、開口部幅を設定する。この場合開口部幅が
調節されているかどうか位置検出ユニツトで検出
する。また、印刷条件設定板からの信号は制御装置１
０に送られて、排気フアン用変速モーター８を動
かして、排気量を決定する。次に制御装置１０は
マイクロコンピユーターが内蔵され、予め実験の
結果求めた印刷条件とインキ蒸発量との関係を記
憶させておく。本発明は、インキ蒸発量に対し、
より正確に排気量を対応させる為、印刷機回転数
検出器を設け、この信号を制御装置１０に送る。本発明ではまず印刷物の紙幅に応じて印刷物の
乾燥装置への開口部の幅を最小に調節するので、
小さな開口部から新鮮な空気が早い流速で乾燥装
置内に吸入されるので乾燥効率が向上し、しかも
インキ溶剤蒸気が外部に漏れるのが防止できる。
またインキ塗布量が少なく、かつ、コート紙を使
用した場合のようにインキ蒸発量が少ない場合や
印刷機の回転数が小さい場合には排気量の減少率
を多くして排気量を相対的に少なくしてまた、イ
ンキ塗布量が多かつたり、印刷紙をザラ紙にする
ことによりインキ蒸発量が多い場合、あるいは印
刷機の回転数が高い場合は排気量の増加率を多く
して排気量を多くすることにより、乾燥条件変動
に伴う調節を排気量の増減だけできめ細かく行な
うと共に燃料の節減と排気フアンの節電ができ
る。実施例１燃料消費量 (1) 印刷条件と排気量との関係排気量（Ｑ）は次の印刷条件の組み合せに
より決定される。排気量（Ｑ）＝基本排気量（Q₀）×紙幅（Ｗ）×紙質(G
)×インキ塗布割合（Ｐ）×印刷機回転数（Ｒ）Ｗ、Ｇ、Ｐ、Ｒの変動係数は実験の結果次
表となる。基本排気量は各係数が１の場合で3000m³／
Ｈである。 Purpose of the Invention The present invention aims to improve the quality of printed matter by adjusting the amount of exhaust air from a drying device according to the printing conditions of a strip of printed matter, such as the width of the printed matter, the amount of ink applied, the difference in the material of the printing paper, and the slow printing speed. The present invention relates to a method for drying printed matter in the form of a strip, which enables saving of fuel required for drying and power saving of an exhaust fan. Prior Art and its Problems In general, drying devices for strip-shaped printed matter produce smoke that accompanies the printed material from the outlet side opening of the printed material, that is,
Ink solvent vapor leaks from printed matter. This contaminates the inside of the factory and is harmful to the health of workers. Conventionally, the drying device is equipped with an exhaust hole and an exhaust fan, and the exhaust fan is operated while the printing machine is in operation to maintain a negative pressure inside the drying device from the outside. ,
In particular, ink solvent vapor is prevented from leaking to the outside by sucking fresh air into the interior through the outlet opening. Therefore, in order to prevent ink solvent vapor from leaking to the outside, it is desirable that the exhaust fan has a large exhaust capacity. However, in the case of this type of drying device, the amount of fresh air sucked in from the print outlet side opening, that is, the amount of fresh air introduced in proportion to the amount of air exhausted through the exhaust hole, needs to be heated. The amount of heat is a problem, and the amount of fuel consumed is proportional to the amount of displacement mentioned above. Furthermore, if the displacement is large, the amount of power consumed by the exhaust fan is also large. Therefore, it is desirable to reduce the amount of heat as much as possible. On the other hand, the material of printing paper, the amount of ink applied, etc. change depending on the type of printing. Regardless of changes in printing machine speed, printing paper material, and ink application amount,
If the dryer is always exhausting a certain amount of air,
Fine drying cannot be performed. For example, there are cases where coated paper is used, the amount of ink applied is small, and the number of rotations of the printing press is low, and cases where medium-quality paper or rough paper is used, the amount of ink applied is large, and the number of rotations of the printing press is high. , the amount of solvent, etc. generated varies greatly. If a constant displacement is maintained under such different conditions, various disadvantages will occur. For example, if the amount of exhaust is small compared to the amount of solvent generated, the drying chamber will be filled with solvent, creating a risk of explosion and leaving printed matter undried.
There is a risk that it will leave the printing press. Furthermore, if the amount of exhaust is greater than the amount of solvent generated, fuel will be wasted. In particular, the width of the paper for printing, the amount of ink applied, the material of the paper, etc. are always constant during printing when specific printing is performed. However, the rotation speed of the printing press is not always constant, and changes variously not only at the start of printing but also during printing. Therefore, the conveyance speed of the strip-shaped printed matter passing through the heating type drying device attached to the printing press also varies. Conventionally, the width of the printing paper, the material of the printing paper,
There was no known method of adjusting the exhaust volume in accordance with the amount of ink applied, the speed of the printing press, etc., thereby saving fuel and performing detailed drying by adjusting the degree of opening of the openings and increasing or decreasing the exhaust volume. Composition of the Invention The present invention provides for, in drying a strip-shaped printed material drying device equipped with an exhaust hole and an exhaust fan, adjusting the horizontal length of an opening on the entrance/exit side to the printed material drying device to a minimum according to the width of the printed material. In addition, the rate of increase/decrease in the exhaust volume of the drying device due to fluctuations in the rotational speed of the printing press during printing is changed in accordance with the paper quality and ink application amount of each strip of printed material to be dried. The present invention relates to a method for drying a strip-shaped printed matter, characterized in that drying corresponding to the above is performed by adjusting the exhaust volume. Effects of the Invention In the present invention, it is possible to minimize the amount of gas discharged from the drying chamber by adjusting the entrance/exit to the drying chamber for printed matter to the minimum value according to the width of the printed matter, thereby eliminating waste of fuel. This is one of its characteristics. Furthermore, during printing, instead of adjusting the exhaust volume according to increases or decreases in the conveyance speed of printed matter, fine-grained drying is possible by changing it according to the paper quality and ink application amount of each printed matter to be dried. . Preferred embodiments of the invention The present invention will be explained with reference to the drawings. FIG. 1 is a schematic view of the drying device seen from the front, and FIG. 2 is a side view, particularly showing the installation state of the opening width adjusting device of the opening on the entrance/exit side. The parts of this device are shown as follows. In this drying device, printed matter is moved from left to right and dried. At this time, the exhaust gas containing the ink solvent vapor is exhausted by the exhaust fan 7, and fresh air is sucked into the interior through the opening 11, and the ink solvent vapor is transferred to the print outlet side opening 1.
1. This prevents leakage to the outside. The width and displacement of the printed material entrance/exit opening 11 are adjusted as follows. The setting board shown in FIG. 3 is for adjusting the opening width according to the paper width, and FIG. 3 shows the printing condition setting board. On this printing condition setting board, the paper width number, paper quality, and ink ratio of "high", "medium", and "small" are buttons, which the operator presses each time the printing conditions are changed. The number of paper width buttons, paper quality and ink amount buttons may be increased. Each data from this printing condition setting board is sent to the control device 10, which drives the drive motor 12 for varying the width of the opening to the printed matter drying device, and drives the drive shaft 15.
, and move the damper plate 11 on the guide shaft 16 to set the opening width. In this case, the position detection unit detects whether the opening width is adjusted. In addition, the signal from the printing condition setting board is transmitted to the control device 1.
0 and operates the exhaust fan variable speed motor 8 to determine the displacement. Next, the control device 10 has a built-in microcomputer, and stores the relationship between the printing conditions and the amount of ink evaporation determined in advance as a result of experiments. In the present invention, the amount of ink evaporation is
In order to more accurately correspond to the displacement, a printing press rotation speed detector is provided and this signal is sent to the control device 10. In the present invention, first, the width of the opening to the drying device for printed matter is adjusted to the minimum according to the paper width of the printed matter.
Fresh air is sucked into the dryer through the small opening at a high flow rate, improving drying efficiency and preventing ink solvent vapor from leaking outside.
In addition, when the amount of ink applied is small and the amount of ink evaporation is small, such as when using coated paper, or when the rotation speed of the printing press is low, the reduction rate of the exhaust volume is increased to relatively reduce the exhaust volume. Also, if the amount of ink applied is large, the amount of ink evaporation is large due to rough printing paper, or if the rotation speed of the printing press is high, increase the rate of increase in the exhaust volume to increase the exhaust volume. By increasing the number of exhaust fans, it is possible to make fine adjustments in response to fluctuations in drying conditions by simply increasing or decreasing the exhaust volume, and also to save fuel and power for the exhaust fan. Example 1 Fuel consumption (1) Relationship between printing conditions and displacement The displacement (Q) is determined by the following combination of printing conditions. Displacement volume (Q) = Basic displacement volume (Q ₀ ) x Paper width (W) x Paper quality (G
) × ink application ratio (P) × printing machine rotation speed (R) The coefficients of variation of W, G, P, and R are shown in the table below as a result of experiments. The basic displacement is 3000m ³ / when each coefficient is 1.
It is H.

【表】 (2) 従来の装置との比較（例）印刷条件紙幅880mm、紙質上質、インキ割合普通、回転数440rpm、排気温度 160℃ (1) 従来の装置の排気量（Q₁） Q₁＝Q₀×１（Ｗ）×１(G) ×１（Ｐ）×１（Ｒ）＝3000m³／Ｈ熱料消費量（q₁） q₁＝3000m³／Ｈ×160℃ ×0.32kcal／m³℃（空気比熱）＝153600kcal／Ｈ (2) 本発明装置での排気量（Q₂） Q₂＝Q₀×0.88（Ｗ）×1.2(G) ×0.75（Ｐ）×0.8（Ｒ）＝0.634Q₀≒1900m³／Ｈ熱料消費量（q₂） q₂＝1900×160×0.32＝97280kcal／Ｈ q₁−q₂≒56320kcal／Ｈ従つて排気量が約63％になり、燃料は約
56300kcal／Ｈの節減となつた。更に紙幅が狭く、紙質がコート、インキ割合
が少く、回転数が小さくなればこれ以上の燃料
消費の節減となる。２電力消費量 (1) 排気量と軸動力の関係（排気フアン）は第
６図に示される。図中の線Ａは従来のダンパ
ー制御を示し、線Ｂは本発明の可変速モータ
ー制御を示す。 (2) 従来の装置との比較（例） Q₁＝3000m³／Ｈ Q₂＝1900m³／Ｈ上記図より (1) 従来のダンパー制御の場合での調節量
（F₁） F₁＝21kw−16kw＝5kwH (2) 本発明の可変速モーター制御の場合での
節電量（F₂） F₂＝12.6kw−6kw＝6.6kwH (3) 本発明の場合で従来との節電量（F₃） F₃＝21kw−6kw＝15kwH 以上の様に大幅な節電が出来た。[Table] (2) Comparison with conventional equipment (example) Printing conditions Paper width 880 mm, high quality paper, ink ratio Normal, rotation speed 440 rpm, exhaust temperature 160°C (1) Exhaust volume of conventional equipment (Q ₁ ) Q ₁ =Q ₀ ×1(W)×1(G)×1(P)×1(R)=3000m ³ /H Heat consumption (q ₁ ) q ₁ =3000m ³ /H×160℃×0.32kcal/ m ³ °C (specific heat of air) = 153600 kcal/H (2) Displacement amount with the device of the present invention (Q ₂ ) Q ₂ = Q ₀ ×0.88 (W) × 1.2 (G) × 0.75 (P) × 0.8 (R) =0.634Q ₀ ≒1900m ³ /H Heat consumption (q ₂ ) q ₂ = 1900×160×0.32=97280kcal/H q ₁ −q ₂ ≒56320kcal/H Therefore, the displacement is approximately 63%, and the fuel is about
This resulted in a savings of 56,300kcal/H. Furthermore, if the paper width is narrower, the paper quality is coated, the ink ratio is lower, and the rotational speed is lower, fuel consumption can be further reduced. 2. Power consumption (1) The relationship between displacement and shaft power (exhaust fan) is shown in Figure 6. Line A in the figure shows conventional damper control, and line B shows variable speed motor control of the present invention. (2) Comparison with conventional equipment (example) Q ₁ = 3000m ³ /H Q ₂ = 1900m ³ /H From the above figure (1) Adjustment amount in case of conventional damper control (F ₁ ) F ₁ = 21kw −16kw=5kwH (2) Amount of power saved in the case of variable speed motor control of the present invention (F ₂ ) F ₂ =12.6kw−6kw=6.6kwH ( ₃ ) Amount of power saved in the case of the present invention compared to conventional ) F ₃ = 21kw - 6kw = 15kwH As shown above, significant power savings were achieved.

[Brief explanation of drawings]

第１図は本発明に使用する乾燥装置を正面から
見た概略図。第２図は乾燥装置の側面図。第３図
は印刷条件設定板の正面図。第４図は制御装置の
フロートシートである。第５図は排気量と軸動力
との関係を示すグラフである。１……印刷物、２……乾燥装置ハウジング、３
……熱風吹出しノズル組立体、４……送気フア
ン、５……加熱バーナー、６……熱焼用空気フア
ン、７……排気フアン、８……可変速モーター、
１０……制御装置、１１……開口部、１２……駆
動モーター、１３……位置検出ユニツト、１４…
…リミツトスイツチ、１５……駆動軸、１６……
案内軸、１７……ダンパー板。 FIG. 1 is a schematic front view of the drying device used in the present invention. FIG. 2 is a side view of the drying device. FIG. 3 is a front view of the printing condition setting board. FIG. 4 shows a float sheet of the control device. FIG. 5 is a graph showing the relationship between displacement and shaft power. 1...Printed material, 2...Drying device housing, 3
... Hot air blowing nozzle assembly, 4 ... Air supply fan, 5 ... Heating burner, 6 ... Air fan for hot baking, 7 ... Exhaust fan, 8 ... Variable speed motor,
DESCRIPTION OF SYMBOLS 10... Control device, 11... Opening, 12... Drive motor, 13... Position detection unit, 14...
...Limit switch, 15... Drive shaft, 16...
Guide shaft, 17... damper plate.

Claims

[Claims]

1. When drying strip-shaped printed products using a drying device equipped with an exhaust hole and an exhaust fan, the horizontal length of the opening on the entrance/exit side to the printed material drying device should be adjusted to the minimum according to the width of the printed material, and the length of the printing machine should be adjusted to the minimum. The rate of increase/decrease in the exhaust volume of the drying device due to fluctuations in the rotational speed during printing is changed according to the paper quality and ink application amount of each strip of printed material to be dried, and the drying exhaust volume is adjusted according to the fluctuation in the rotational speed of the printing machine. A method for drying a strip-shaped printed matter, characterized in that the drying method is carried out by adjusting the amount.