JPH10109405A - Drying apparatus - Google Patents
Drying apparatusInfo
- Publication number
- JPH10109405A JPH10109405A JP26575396A JP26575396A JPH10109405A JP H10109405 A JPH10109405 A JP H10109405A JP 26575396 A JP26575396 A JP 26575396A JP 26575396 A JP26575396 A JP 26575396A JP H10109405 A JPH10109405 A JP H10109405A
- Authority
- JP
- Japan
- Prior art keywords
- hot air
- drying chamber
- substrate
- temp
- drying
- 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.)
- Pending
Links
Landscapes
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、グラビア印刷機、
オフセット輪転印刷機、又は塗工機等において用いら
れ、紙、フィルム等の連続帯状基体に印刷、塗工した
後、これを乾燥あるいは熱処理するための、乾燥装置に
関する。TECHNICAL FIELD The present invention relates to a gravure printing machine,
The present invention relates to a drying apparatus used in an offset rotary printing press, a coating machine, or the like, for printing and coating a continuous belt-like substrate such as paper or film, and then drying or heat-treating the substrate.
【０００２】[0002]
【従来の技術】連続帯状基体の乾燥方法としては、熱風
による方法、赤外線による方法、加熱ドラムによる方法
等があるが、印刷機や塗工機では、紙、フィルムの印刷
物、塗工物を敏速に乾燥する必要上、熱風方式が一般的
である。従来から、印刷済基体を乾燥させるための乾燥
装置として乾燥室と、乾燥室内に配置され基体に対して
熱風を吹付ける熱風吹付部とを備えたものが知られてい
る。2. Description of the Related Art As a method for drying a continuous band-shaped substrate, there are a method using hot air, a method using infrared rays, a method using a heating drum, and the like. Because of the necessity of drying, a hot air system is generally used. BACKGROUND ART Conventionally, as a drying device for drying a printed substrate, a device provided with a drying chamber and a hot air blowing unit disposed in the drying chamber and blowing hot air to the substrate is known.
【０００３】基体は一般に紙あるいはフィルム製となっ
ており、このような基体に対して印刷機または塗布機に
よりインキまたは塗料が転写される。インキまたは塗料
が転写された印刷済基体は、その後乾燥装置内で乾燥さ
れる。A substrate is generally made of paper or film, and ink or paint is transferred to such a substrate by a printing machine or a coating machine. The printed substrate to which the ink or paint has been transferred is then dried in a drying device.
【０００４】[0004]
【発明が解決しようとする課題】上述のように基体は一
般に、紙あるいはフィルム製となっており、巻体となっ
て予め保存されている。次にこの巻体から基体が繰り出
され、基体は印刷機または塗工機に入り、この基体に対
してインキまたは塗料が転写される。As described above, the substrate is generally made of paper or film, and is stored in advance as a roll. The substrate is then unwound from the winding and the substrate enters a printing or coating machine, onto which ink or paint is transferred.
【０００５】特に、紙製基体の場合は、保管状態に応じ
て巻体の内側と外側とで含水率が変化しており、また巻
体の幅方向に沿っても含水率が変化している。このため
印刷済基体を乾燥装置内で乾燥する際、基体の含水率の
相違により基体の熱による収縮度も変化し、基体自体が
歪んでしまうことがある。[0005] In particular, in the case of a paper substrate, the water content varies between the inside and outside of the roll according to the storage condition, and also varies along the width direction of the roll. . For this reason, when the printed substrate is dried in the drying device, the degree of shrinkage of the substrate due to heat varies depending on the moisture content of the substrate, and the substrate itself may be distorted.
【０００６】このように基体自体が歪んでしまうと、例
えば多色刷りの際、見当ずれが生じてしまう。現状で
は、乾燥装置通退後の紙の収縮の度合いに合わせて熱風
温度をマニュアルで変えることで見当ずれを補正してい
るが、乾燥装置の輻射の影響のため、熱風の最適温度の
設定が大変難しい。When the substrate itself is distorted in this way, misregistration occurs in, for example, multicolor printing. At present, misregistration is corrected by manually changing the hot air temperature according to the degree of paper shrinkage after the drying device has passed through, but due to the radiation of the drying device, the optimal temperature of the hot air has been set. Very difficult.
【０００７】本発明はこのような点を考慮してなされた
ものであり、基体の含水率の変化すなわち熱収縮度の変
化に合わせて乾燥温度を正しく調整することができる乾
燥装置を提供することを目的とする。[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide a drying apparatus capable of correctly adjusting a drying temperature in accordance with a change in moisture content of a substrate, that is, a change in heat shrinkage. With the goal.
【０００８】[0008]
【課題を解決するための手段】本発明は、連続帯状基体
を乾燥させるための乾燥装置において、乾燥室と、この
乾燥室内に配置され、基体に熱風を吹付ける熱風吹付部
とを備え、前記乾燥室内面の黒度を０〜０．３としたこ
とを特徴とする乾燥装置である。According to the present invention, there is provided a drying apparatus for drying a continuous strip-shaped substrate, comprising: a drying chamber; and a hot-air blowing unit disposed in the drying chamber and blowing hot air to the substrate. A drying apparatus characterized in that the blackness of the inside of the drying chamber is 0 to 0.3.
【０００９】本発明によれば、乾燥室内面の黒度を０〜
０．３としたことにより、乾燥室内における加熱による
輻射の発生を抑えることができる。According to the present invention, the blackness of the inside of the drying chamber is set to 0 to 0.
By setting the ratio to 0.3, generation of radiation due to heating in the drying chamber can be suppressed.
【００１０】[0010]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態について説明する。図１は本発明による乾燥装
置の一実施の形態を示す図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a drying apparatus according to the present invention.
【００１１】図１に示すように、巻体１３から繰り出さ
れた紙製基体２は版胴３と圧胴４との間を通過して乾燥
装置１０に送られるようになっている。このうち版胴３
と圧胴４とによって塗工機が構成されるされるととも
に、版胴３は塗工液５が収納された塗工液収納パン５ａ
内に配置されている。As shown in FIG. 1, the paper base 2 unwound from the roll 13 passes between the plate cylinder 3 and the impression cylinder 4 and is sent to the drying device 10. Among them, plate cylinder 3
And an impression cylinder 4 constitute a coating machine, and the plate cylinder 3 is provided with a coating liquid storage pan 5a in which the coating liquid 5 is stored.
Is located within.
【００１２】また乾燥装置１０は乾燥室７と、この乾燥
室７内に収納された熱風供給ダクト９とを備え、熱風供
給ダクト９は紙製基体２に対面して設けられた熱風吹付
部８を有している。また熱風吹付部８は、制御装置１２
により熱風温度が調整されている。The drying apparatus 10 includes a drying chamber 7 and a hot air supply duct 9 housed in the drying chamber 7. The hot air supply duct 9 is provided with a hot air blowing section 8 provided to face the paper base 2. have. Further, the hot air blowing unit 8 includes a control device 12.
The hot air temperature is adjusted by.
【００１３】熱風吹付部８は紙製基体２の走行方向に沿
って複数、たとえば６個設けられており、各熱風吹付部
８は紙製基体２に対して熱風を吹付けるようになってい
る。また熱風吹付部８間には熱風の排気通路１１が形成
されている。この排気通路１１は熱風ダクト９を貫通し
て設けられているが、排気通路１１を熱風ダクト９を貫
通しない適当な深さの溝から構成してもよい。A plurality of hot air blowing portions 8 are provided along the running direction of the paper base 2, for example, six hot air blowing portions 8. Each hot air blowing portion 8 blows hot air to the paper base 2. . An exhaust passage 11 for hot air is formed between the hot air blowing sections 8. Although the exhaust passage 11 is provided so as to pass through the hot air duct 9, the exhaust passage 11 may be formed of a groove having an appropriate depth which does not pass through the hot air duct 9.
【００１４】また乾燥室７内には、紙製基体２を案内す
るためのガイドロール６が複数設けられている。さらに
乾燥室７は鉄板またはステンレス板等からなり、その内
面には亜鉛メッキ等が施されて黒度が抑えられており、
このため輻射熱発生が制御されている。A plurality of guide rolls 6 for guiding the paper base 2 are provided in the drying chamber 7. Further, the drying chamber 7 is made of an iron plate or a stainless steel plate or the like, and its inner surface is subjected to galvanization or the like to suppress blackness.
Therefore, radiant heat generation is controlled.
【００１５】すなわち乾燥室７内の黒度は、０〜０．３
となっており、このため輻射熱発生が抑えられている。That is, the degree of blackness in the drying chamber 7 is 0 to 0.3.
Therefore, generation of radiant heat is suppressed.
【００１６】ここで輻射熱発生を示す物体からの放射Ｅ
は、物体の温度及び黒度の関数で以下の（１）式のよう
に表わされる。 Ｅ＝ｅαＴ４ …（１） （１）式において、Ｅは物体からの輻射、ｅは黒度、α
はステファン・ボルツマン定数、Ｔは物体温度である。Here, the radiation E from an object exhibiting radiation heat generation
Is a function of the temperature and the blackness of the object, and is expressed by the following equation (1). E = eαT 4 (1) In equation (1), E is radiation from an object, e is blackness, α
Is the Stefan-Boltzmann constant, and T is the object temperature.
【００１７】例えば、乾燥室７が鉄板により作製されて
いる場合、鉄板の黒度０．９５と高いため乾燥装置１０
内では加熱により輻射が発生し易いが、上述のように本
発明によれば、乾燥室７は鉄板等の内面に亜鉛メッキを
施して構成されその黒度０〜０．３となっているので、
加熱による輻射の発生は抑えられている。For example, when the drying chamber 7 is made of an iron plate, since the blackness of the iron plate is as high as 0.95, the drying device 10 is used.
However, according to the present invention, as described above, the drying chamber 7 is formed by galvanizing the inner surface of an iron plate or the like and has a blackness of 0 to 0.3. ,
Generation of radiation due to heating is suppressed.
【００１８】次にこのような構成からなる本実施の形態
の作用について説明する。図１に示すように巻体１３か
ら繰り出される紙製基体２は、版胴３と圧胴４との間に
進入し、この基体２に対して版胴３により塗工液５が塗
布される。Next, the operation of the present embodiment having such a configuration will be described. As shown in FIG. 1, the paper substrate 2 unwound from the roll 13 enters between the plate cylinder 3 and the impression cylinder 4, and the coating liquid 5 is applied to the substrate 2 by the plate cylinder 3. .
【００１９】版胴３と圧胴４とを通過した基体２は、そ
の後乾燥装置１０の乾燥室７内に入り、乾燥される。こ
の場合、乾燥室７内に進入した基体２に対して、熱風ダ
クト９の各熱風吹付部８から熱風が、例えば約２０〜５
０ｍ／ｓで吹付けられる。基体２に対して吹付けられた
熱風は、基体２に当接して基体２上の塗工液５を乾燥さ
せ、その後排気通路１１から排気される。The substrate 2 that has passed through the plate cylinder 3 and the impression cylinder 4 then enters the drying chamber 7 of the drying device 10 and is dried. In this case, hot air is blown from the hot air blowing portions 8 of the hot air duct 9 to the base 2 that has entered the drying chamber 7, for example, about 20 to
It is sprayed at 0 m / s. The hot air blown against the base 2 contacts the base 2 to dry the coating liquid 5 on the base 2, and then is exhausted from the exhaust passage 11.
【００２０】巻体１３から繰り出される紙製基体２は、
巻体１３の内側または外側において含水率が変化してい
る。このため紙製基体２の含水率の変化に応じて各熱風
吹付部８からの熱風温度を調整させ、これにより基体２
を均一に収縮させる必要がある。The paper base 2 unwound from the winding body 13 is
The water content changes inside or outside the winding body 13. Therefore, the temperature of the hot air from each hot air blowing unit 8 is adjusted according to the change in the water content of the paper base 2, whereby the base 2
Must be uniformly shrunk.
【００２１】本発明においては、各熱風吹付部８からの
熱風温度を、紙製基体の含水率に対応させて変化させて
いる。In the present invention, the temperature of the hot air from each hot air blowing section 8 is changed in accordance with the water content of the paper base.
【００２２】すなわち、図１に示すように巻体１３から
基体２の繰り出し量が制御装置１２に入力される。同時
に基体２が繰り出される部位に取付けられた非接触型の
含水率計１５により、基体２の含水率が測定され、次に
基体２の含水率が制御装置１２に入力される。次に制御
装置１２はこの含水率に基づいて各熱風吹付部８の最適
熱風温度を求め、各熱風吹付部８からの熱風温度が最適
熱風温度となるよう運転制御する。That is, as shown in FIG. 1, the feed amount of the base 2 from the winding body 13 is input to the control device 12. At the same time, the moisture content of the substrate 2 is measured by a non-contact moisture content meter 15 attached to a portion where the substrate 2 is fed out. Next, the controller 12 determines the optimum hot air temperature of each hot air blowing unit 8 based on the water content, and controls the operation so that the hot air temperature from each hot air blowing unit 8 becomes the optimum hot air temperature.
【００２３】この場合、乾燥室７内面の黒度は０〜０．
３となっており、乾燥室７内面において輻射の発生が抑
えられているので、各熱風吹付部８からの熱風温度を精
度良く制御することができる。すなわち、乾燥室７内面
において加熱による輻射が発生すると、とりわけ熱風温
度を低下させる際の制御において追随性が悪く、精度良
く制御することができないが、本実施の形態によれば、
乾燥室７内面において輻射の発生が抑えられるので、と
りわけ熱風温度を低下させる際の制御を精度良く行なう
ことができる。In this case, the blackness of the inner surface of the drying chamber 7 is from 0 to 0.
3, since the generation of radiation on the inner surface of the drying chamber 7 is suppressed, the temperature of the hot air from each hot air blowing unit 8 can be controlled with high accuracy. That is, when radiation due to heating is generated on the inner surface of the drying chamber 7, the controllability at the time of lowering the hot air temperature is poor, and the control cannot be performed with high accuracy. However, according to the present embodiment,
Since the generation of radiation is suppressed on the inner surface of the drying chamber 7, the control particularly when the hot air temperature is reduced can be performed with high accuracy.
【００２４】[0024]
【発明の効果】以上説明したように本発明によれば、乾
燥室内における加熱による輻射の発生を抑えることがで
きる。このため熱風吹付部からの熱風温度の制御を精度
良く行なうことができる。As described above, according to the present invention, generation of radiation due to heating in the drying chamber can be suppressed. For this reason, the control of the hot air temperature from the hot air blowing section can be performed with high accuracy.
【図１】本発明による乾燥装置の一実施の形態を示す概
略図。FIG. 1 is a schematic view showing an embodiment of a drying apparatus according to the present invention.
２ 紙製基体 ３ 版胴 ４ 圧胴 ５ 塗工液 ６ ガイドロール ７ 乾燥室 ８ 熱風吹付部 ９ 熱風ダクト １０ 乾燥装置 １１ 排気通路 １２ 制御装置 １３ 巻体 2 paper base 3 plate cylinder 4 impression cylinder 5 coating liquid 6 guide roll 7 drying room 8 hot air blowing section 9 hot air duct 10 drying device 11 exhaust passage 12 control device 13 winding body
Claims (2)
付部とを備え、 前記乾燥室内面の黒度を０〜０．３としたことを特徴と
する乾燥装置。1. A hot-air drying apparatus for a continuous strip-shaped substrate, comprising: a drying chamber; and a hot-air blowing unit disposed in the drying chamber and blowing hot air to the substrate. 3. A drying device, wherein the drying device is 3.
と、 含水率計からの含水率に基づいて熱風吹付部からの熱風
流量を制御する制御装置と、を更に備えたことを特徴と
する請求項１記載の乾燥装置。2. A roll for unwinding a substrate, a moisture content meter for measuring a moisture content of the substrate unreeled from the wound body, and a control for controlling a flow rate of hot air from a hot air blowing unit based on the moisture content from the moisture content meter. The drying device according to claim 1, further comprising an apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26575396A JPH10109405A (en) | 1996-10-07 | 1996-10-07 | Drying apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26575396A JPH10109405A (en) | 1996-10-07 | 1996-10-07 | Drying apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10109405A true JPH10109405A (en) | 1998-04-28 |
Family
ID=17421540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26575396A Pending JPH10109405A (en) | 1996-10-07 | 1996-10-07 | Drying apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10109405A (en) |
-
1996
- 1996-10-07 JP JP26575396A patent/JPH10109405A/en active Pending
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