JPH05193115A - Ink supplying apparatus - Google Patents
Ink supplying apparatusInfo
- Publication number
- JPH05193115A JPH05193115A JP4010208A JP1020892A JPH05193115A JP H05193115 A JPH05193115 A JP H05193115A JP 4010208 A JP4010208 A JP 4010208A JP 1020892 A JP1020892 A JP 1020892A JP H05193115 A JPH05193115 A JP H05193115A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- temperature
- roller
- ink fountain
- fountain roller
- 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.)
- Withdrawn
Links
Abstract
Description
【産業上の利用分野】本発明は、オフセツト印刷機のイ
ンキ供給装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply device for an offset printing machine.
【従来の技術】従来のインキ供給装置を図２により説明
すると、１がインキ出しローラ、４がインキ、５がイン
キ出し調整板、６がインキ出しローラ１とインキ出し調
整板５との間に形成した隙間、８がインキ呼び出しロー
ラである。上記図２に示すインキ供給装置では、インキ
出しローラ１の回転により、インキ出し調整板５とイン
キ出しローラ１との間に溜められたインキ４が隙間６へ
導かれる。この隙間６の間隔は、インキ出し調整板５を
紙面で消費されるインキ量に応じ移動させて、調整され
る。インキ消費量の多いときには、隙間６の間隔は、大
きくなる。隙間６を通過した後のインキ出しローラ１上
のインキ膜厚は、インキ４の粘度などの流動物性が一定
ならば、隙間６の間隔のみに支配されて、隙間６の間隔
が大きければ、インキ膜厚が厚くなる。隙間６を通過し
た後のインキ出しローラ１上のインキ膜厚の一定比率分
は、インキ呼び出しローラ８（矢印方向に往復動して、
インキ出しローラ１に間歇的に接するインキ呼び出しロ
ーラ８）により、それよりも下流側のインキ練りならし
ローラ群（図示せず）へ転写供給され、それ以降は、版
面、ゴムブランケット面へ順次転写されて、最後に紙面
上に転写される。つまり紙面上に転写されたインキ量
は、隙間６の間隔に略比例する。2. Description of the Related Art A conventional ink supply device will be described with reference to FIG. 2. 1 is an ink ejection roller, 4 is ink, 5 is an ink ejection adjusting plate, and 6 is between the ink ejection roller 1 and the ink ejection adjusting plate 5. The formed gap, 8 is an ink feeding roller. In the ink supply device shown in FIG. 2, the ink 4 accumulated between the ink-delivery adjusting plate 5 and the ink-delivery roller 1 is guided to the gap 6 by the rotation of the ink-delivery roller 1. The gap 6 is adjusted by moving the ink discharge adjusting plate 5 according to the amount of ink consumed on the paper surface. When the ink consumption is large, the gap 6 becomes large. The ink film thickness on the ink delivery roller 1 after passing through the gap 6 is governed only by the gap 6 if the fluid properties such as the viscosity of the ink 4 are constant. If the gap 6 is large, the ink film thickness is large. The film thickness increases. A certain proportion of the ink film thickness on the ink discharge roller 1 that has passed through the gap 6 is the ink feeding roller 8 (which reciprocates in the arrow direction,
By an ink feeding roller 8) which is intermittently in contact with the ink discharging roller 1, the ink is fed to a group of ink leveling rollers (not shown) on the downstream side, and thereafter, sequentially transferred to the plate surface and the rubber blanket surface. Then, the image is finally transferred onto the paper surface. That is, the amount of ink transferred onto the paper surface is approximately proportional to the gap 6.
【発明が解決しようとする課題】前記図２に示す従来の
インキ供給装置では、隙間６の間隔が同一ならば、紙面
上に常に一定量のインキ４が供給されるが、これは、あ
くまでも隙間６を通過するインキ４の流動物性が安定な
場合である。一般に、朝、印刷を開始し、印刷の継続に
つれて、各ローラの表面温度は徐々に上昇してゆく。当
然、インキ出しローラ１も印刷時間が長くなるにつれ
て、その表面温度が徐々に上昇してゆく。この結果、イ
ンキ出しローラ１の回転につれて、隙間６に入り込むイ
ンキ４の温度も上昇する。インキ４の温度上昇は、イン
キ粘度の低下を引き起こす。このように印刷時間が長く
なるにつれて、隙間６に入るインキ４の粘度が低下する
ため、これに伴い隙間６から引き出されるインキ膜厚が
増加し、結果として紙面へのインキ供給量、即ち、ベタ
濃度が徐々に増加する。図３は、この現象の一例を示し
ている。紙面へのインキ供給量を一定にして、印刷濃度
を一定に保つためには、ローラ温度の上昇につれて、隙
間６の間隔を徐々に狭くしてやらなければならないが、
この調整に次のような不都合を生じている。 （１）温度変化によるインキ供給量の変化は、徐々にそ
して長時間続くが、この間、印刷オペレータは、印刷機
から離れることができなくて、印刷作業の省人化に大き
な障害になっている。 （２）上記のようにインキ供給量が変化してゆく期間
は、隙間６の間隔が同一でも、温度変化により印刷濃度
が大きく変動するため、刷り始めの色合わせが非常に難
しくなって、色合わせ時間が長くなる。その結果、色合
わせの際に生じる損紙の枚数が増加する。 なお普通は、朝、印刷を開始する際、ローラ表面を温め
るため、機械の空転が行われるが、この空転により温ま
るのは、インキ呼び出しローラ８以降の下流側のインキ
ローラ群のみである。印刷機の空転時には、インキ呼び
出しローラ８が常にそれよりも下流側のインキ練りなら
しローラ群に接しているため、インキローラ群の熱がイ
ンキ出しローラ１に伝達されなくて、インキ出しローラ
１の表面温度は、空転によっても、上昇しない。本発明
は前記の問題点に鑑み提案するものであり、その目的と
する処は、印刷作業の省人化を達成できる。また色合わ
せの際に生じる損紙の枚数を減少できるインキ供給装置
を提供しようとする点にある。In the conventional ink supply device shown in FIG. 2, if the gaps 6 are the same, a fixed amount of ink 4 is always supplied onto the paper surface. This is the case where the fluid properties of the ink 4 passing through 6 are stable. Generally, printing is started in the morning, and as the printing is continued, the surface temperature of each roller gradually rises. Naturally, the surface temperature of the inking roller 1 also gradually rises as the printing time becomes longer. As a result, the temperature of the ink 4 entering the gap 6 also rises as the ink delivery roller 1 rotates. An increase in the temperature of the ink 4 causes a decrease in ink viscosity. Thus, as the printing time becomes longer, the viscosity of the ink 4 entering the gap 6 decreases, and accordingly, the ink film thickness drawn out from the gap 6 increases, and as a result, the ink supply amount to the paper surface, that is, the solid color. The concentration gradually increases. FIG. 3 shows an example of this phenomenon. In order to keep the amount of ink supplied to the paper surface constant and to keep the printing density constant, it is necessary to gradually narrow the gap 6 as the roller temperature rises.
This adjustment has the following disadvantages. (1) The change of the ink supply amount due to the temperature change gradually and lasts for a long time, but during this period, the printing operator cannot keep away from the printing machine, which is a great obstacle to the labor saving of the printing work. . (2) During the period in which the ink supply amount changes as described above, even if the gaps 6 are the same, the print density greatly changes due to the temperature change. Matching time becomes longer. As a result, the number of damaged sheets that are generated during color matching increases. Normally, when the printing is started in the morning, the surface of the roller is warmed to idle the machine. However, the idle warms only the ink roller group downstream from the ink feeding roller 8. When the printing machine runs idle, the ink feeding roller 8 is always in contact with the ink leveling roller group on the downstream side thereof, so that the heat of the ink roller group is not transferred to the ink feeding roller 1 and the ink feeding roller 1 The surface temperature of is not increased even by idling. The present invention is proposed in view of the above problems, and the object of the present invention is to achieve labor saving in printing work. Another object of the present invention is to provide an ink supply device that can reduce the number of damaged sheets that occur during color matching.
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、インキ出しローラと、インキ出し調整
板とを有するインキ供給装置において、前記インキ出し
ローラの表面を加熱する加熱装置と、前記インキ出しロ
ーラの表面温度を計測する温度センサと、同温度センサ
からの温度計測信号と予め設定した目標温度値とを比
較、演算してその結果得られた制御信号を前記加熱装置
へ送ってインキ出しローラの表面温度を目標温度値に略
一致させる温度制御装置とを具えている。In order to achieve the above-mentioned object, the present invention is an ink supply device having an ink discharge roller and an ink discharge adjusting plate, and a heating device for heating the surface of the ink discharge roller. And a temperature sensor that measures the surface temperature of the ink discharge roller, compares the temperature measurement signal from the temperature sensor with a preset target temperature value, and calculates and outputs the resulting control signal to the heating device. And a temperature control device for making the surface temperature of the inking roller substantially match the target temperature value.
【作用】本発明のインキ供給装置は前記のように構成さ
れており、インキ出しローラとインキ出し調整板との間
の隙間を通過したインキをインキ出しローラ上に転写
し、次いでインキ出しローラ→インキ呼び出しローラ→
下流側のインキ練りならしローラ群へ転写供給している
ときに、インキ出しローラに設けた加熱装置を作動し
て、インキ出しローラの外周面全域を均一に加熱する一
方、インキ出しローラの表面温度を温度センサにより計
測して、そのとき得られる温度計測信号を温度制御装置
へ送り、ここで同温度センサからの温度計測信号と温度
制御装置に予め設定した目標温度値とを比較、演算し
て、その結果得られた制御信号を上記加熱装置へ送り、
同加熱装置をオン・オフ制御して、インキ出しローラの
表面温度を目標温度値に略一致させる。The ink supply device of the present invention is configured as described above, and transfers the ink passing through the gap between the ink discharge roller and the ink discharge adjusting plate onto the ink discharge roller, and then the ink discharge roller → Ink call roller →
While transferring and supplying to the ink leveling roller group on the downstream side, the heating device provided on the ink discharging roller is operated to uniformly heat the entire outer peripheral surface of the ink discharging roller, while the surface of the ink discharging roller is The temperature is measured by the temperature sensor, and the temperature measurement signal obtained at that time is sent to the temperature control device, where the temperature measurement signal from the temperature sensor and the target temperature value preset in the temperature control device are compared and calculated. The resulting control signal to the heating device,
The heating device is controlled to be turned on / off so that the surface temperature of the ink discharge roller is substantially equal to the target temperature value.
【実施例】次に本発明のインキ供給装置を図１に示す一
実施例により説明すると、１がインキ出しローラ、２が
電熱ヒータ（加熱装置）で、同電熱ヒータ２は、インキ
出しローラ１の表面近くのインキ出しローラ１内に埋設
されて、インキ出しローラ１の表面を均一に加熱するよ
うになっている。なおこの電熱ヒータ（加熱装置）は、
加熱・冷却を行う加熱・冷却装置に代えても差し支えな
い。また７が同電熱ヒータ２に通電する温度制御装置、
３がインキ出しローラ１の表面温度を非接触で計測する
赤外線放射温度センサで、同赤外線放射温度センサ３が
インキ出しローラ１の近傍に設置されている。４がイン
キ、５がインキ出し調整板、６がインキ出しローラ１と
インキ出し調整板５との間に形成した隙間、８がインキ
呼び出しローラである。次に前記図１に示すインキ供給
装置の作用を具体的に説明する。インキ出しローラ１の
回転により、インキ出し調整板５とインキ出しローラ１
との間に溜められたインキ４が隙間６へ導かれる。また
この隙間６を通過した後のインキ４がインキ出しローラ
１の表面に転写され、次いでインキ出しローラ１上のイ
ンキ膜厚の一定比率分が、インキ呼び出しローラ８（矢
印方向に往復動して、インキ出しローラ１に間歇的に接
するインキ呼び出しローラ８）により、それよりも下流
側のインキ練りならしローラ群（図示せず）へ転写供給
され、それ以降は、版面、ゴムブランケット面へ順次転
写されて、最後に紙面上に転写される。このとき、温度
制御装置７からインキ出しローラ１の電熱ヒータ２へ通
電されて、インキ出しローラ１の外周面全域が均一に加
熱される一方、インキ出しローラ１の表面温度が赤外線
放射温度センサ３により計測されて、そのとき得られる
温度計測信号が温度制御装置７へ送られ、ここで同温度
センサ３からの温度計測信号と温度制御装置７に予め設
定した目標温度値とが比較、演算されて、その結果得ら
れた通電のオン・オフ信号（制御信号）が伝熱ヒータ２
へ送られ、電熱ヒータ２がオン・オフ制御されて、イン
キ出しローラ１の表面温度が目標温度値に略一致する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An ink supply device of the present invention will be described below with reference to an embodiment shown in FIG. 1. 1 is an ink discharging roller, 2 is an electric heater (heating device), and the same electric heater 2 is an ink discharging roller 1. It is embedded in the ink discharge roller 1 near the surface of the ink discharge roller 1 to uniformly heat the surface of the ink discharge roller 1. This electric heater (heating device) is
It may be replaced with a heating / cooling device for heating / cooling. Further, 7 is a temperature control device for energizing the electric heater 2,
Reference numeral 3 denotes an infrared radiation temperature sensor that measures the surface temperature of the ink delivery roller 1 in a non-contact manner. The infrared radiation temperature sensor 3 is installed near the ink delivery roller 1. Reference numeral 4 is an ink, 5 is an ink ejection adjusting plate, 6 is a gap formed between the ink ejection roller 1 and the ink ejection adjusting plate 5, and 8 is an ink feeding roller. Next, the operation of the ink supply device shown in FIG. 1 will be specifically described. By rotating the ink discharge roller 1, the ink discharge adjusting plate 5 and the ink discharge roller 1
The ink 4 accumulated between the ink and the ink is guided to the gap 6. Further, the ink 4 that has passed through the gap 6 is transferred to the surface of the ink discharge roller 1, and then a certain proportion of the ink film thickness on the ink discharge roller 1 is reciprocated in the ink feeding roller 8 (in the direction of the arrow). , The ink feeding roller 8) which is intermittently in contact with the ink discharging roller 1) transfers and supplies the ink to the ink leveling roller group (not shown) on the downstream side, and thereafter sequentially to the plate surface and the rubber blanket surface. It is transferred and finally transferred onto the paper. At this time, the temperature controller 7 energizes the electric heater 2 of the ink take-out roller 1 to uniformly heat the entire outer peripheral surface of the ink take-out roller 1, while the surface temperature of the ink take-out roller 1 is measured by the infrared radiation temperature sensor 3 The temperature measurement signal obtained at that time is sent to the temperature control device 7, where the temperature measurement signal from the temperature sensor 3 and the target temperature value preset in the temperature control device 7 are compared and calculated. Then, the on / off signal (control signal) of energization obtained as a result is the heat transfer heater 2
And the electric heater 2 is controlled to be turned on / off, and the surface temperature of the ink delivery roller 1 substantially matches the target temperature value.
【発明の効果】本発明のインキ供給装置は前記のように
インキ出しローラとインキ出し調整板との間の隙間を通
過したインキをインキ出しローラ上に転写し、次いでイ
ンキ出しローラ→インキ呼び出しローラ→下流側のイン
キ練りならしローラ群へ転写供給しているときに、イン
キ出しローラに設けた加熱装置を作動して、インキ出し
ローラの外周面全域を均一に加熱する一方、インキ出し
ローラの表面温度を温度センサにより計測して、そのと
き得られる温度計測信号を温度制御装置へ送り、ここで
同温度センサからの温度計測信号と温度制御装置に予め
設定した目標温度値とを比較、演算して、その結果得ら
れた制御信号を上記加熱装置へ送り、同加熱装置をオン
・オフ制御して、インキ出しローラの表面温度を目標温
度値に略一致させるので、印刷オペレータがインキ供給
量を監視する必要がなくて、印刷作業の省人化を達成で
きる。また上記のようにインキ出しローラの表面温度を
目標温度値に略一致させるので、印刷濃度を一定にでき
て、色合わせの際に生じる損紙の枚数を減少できる効果
がある。As described above, the ink supply device of the present invention transfers the ink, which has passed through the gap between the ink discharge roller and the ink discharge adjusting plate, onto the ink discharge roller, and then transfers the ink discharge roller to the ink feeding roller. → While transferring and supplying to the ink leveling roller group on the downstream side, the heating device provided in the ink leveling roller is operated to uniformly heat the entire outer peripheral surface of the ink leveling roller, while The surface temperature is measured by the temperature sensor, and the temperature measurement signal obtained at that time is sent to the temperature control device, where the temperature measurement signal from the temperature sensor and the target temperature value preset in the temperature control device are compared and calculated. Then, the control signal obtained as a result is sent to the above heating device, and the heating device is controlled to be turned on and off so that the surface temperature of the ink take-out roller is substantially equal to the target temperature value. Since, the print operator without the need to monitor the ink supplying amount can be achieved labor saving printing operations. Further, as described above, the surface temperature of the ink discharge roller is made to substantially coincide with the target temperature value, so that there is an effect that the printing density can be made constant and the number of waste papers generated at the time of color matching can be reduced.
【図１】本発明のインキ供給装置の一実施例を示す側面
図である。FIG. 1 is a side view showing an embodiment of an ink supply device of the present invention.
【図２】従来のインキ供給装置を示す側面図である。FIG. 2 is a side view showing a conventional ink supply device.
【図３】ベタ濃度及びインキ出しローラ上のインキ温度
と時刻との関係を示す説明図である。FIG. 3 is an explanatory diagram showing a relationship between solid density, ink temperature on an ink discharge roller, and time.
１ インキ出しローラ ２ 加熱装置 ３ 温度センサ ４ インキ ５ インキ出し調整板 ６ 隙間 ７ 温度制御装置 ８ インキ呼び出しローラ 1 Ink Discharging Roller 2 Heating Device 3 Temperature Sensor 4 Ink 5 Ink Dispensing Adjustment Plate 6 Gap 7 Temperature Control Device 8 Ink Calling Roller
Claims (1)
とを有するインキ供給装置において、前記インキ出しロ
ーラの表面を加熱する加熱装置と、前記インキ出しロー
ラの表面温度を計測する温度センサと、同温度センサか
らの温度計測信号と予め設定した目標温度値とを比較、
演算してその結果得られた制御信号を前記加熱装置へ送
ってインキ出しローラの表面温度を目標温度値に略一致
させる温度制御装置とを具えていることを特徴としたイ
ンキ供給装置。1. An ink supply device having an ink discharge roller and an ink discharge adjusting plate, a heating device for heating the surface of the ink discharge roller, and a temperature sensor for measuring the surface temperature of the ink discharge roller. Compare the temperature measurement signal from the temperature sensor with the preset target temperature value,
An ink supply device, comprising: a temperature control device that calculates and sends a control signal obtained as a result to the heating device to make the surface temperature of the ink delivery roller substantially match a target temperature value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4010208A JPH05193115A (en) | 1992-01-23 | 1992-01-23 | Ink supplying apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4010208A JPH05193115A (en) | 1992-01-23 | 1992-01-23 | Ink supplying apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05193115A true JPH05193115A (en) | 1993-08-03 |
Family
ID=11743858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4010208A Withdrawn JPH05193115A (en) | 1992-01-23 | 1992-01-23 | Ink supplying apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05193115A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1048463A1 (en) * | 1999-04-29 | 2000-11-02 | Printing International | Process for inking a printing plate with thermoplastic inks and ink tanks to be used therein |
| JP2004249733A (en) * | 2003-02-21 | 2004-09-09 | Man Roland Druckmas Ag | Method and apparatus for controlling inking device |
| CN113909050A (en) * | 2021-11-03 | 2022-01-11 | 中化国际(控股)股份有限公司 | Coating surface density control device, coating machine and coating surface density control method |
-
1992
- 1992-01-23 JP JP4010208A patent/JPH05193115A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1048463A1 (en) * | 1999-04-29 | 2000-11-02 | Printing International | Process for inking a printing plate with thermoplastic inks and ink tanks to be used therein |
| WO2000066363A1 (en) * | 1999-04-29 | 2000-11-09 | Printing Internat | Process for inking a printing plate with thermoplastic inks and ink tanks to be used therein |
| JP2004249733A (en) * | 2003-02-21 | 2004-09-09 | Man Roland Druckmas Ag | Method and apparatus for controlling inking device |
| CN113909050A (en) * | 2021-11-03 | 2022-01-11 | 中化国际(控股)股份有限公司 | Coating surface density control device, coating machine and coating surface density control method |
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| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |