JPH077209B2 - How to apply photosensitive material to cylinder - Google Patents

Description

The present invention relates to a method of applying a photosensitive material to a cylinder that has been washed with water.

[Conventional technology]

Conventionally, when forming a printing plate surface on the surface of a cylinder, a coating line is formed in which predetermined steps such as pretreatment, photosensitive material coating, baking, and development are arranged, and the cylinder is automatically automated in order on each step on this coating line. It was fed and a predetermined printing plate surface was provided in a predetermined cylinder.

The pretreatment process in this coating line is to clean the surface layer (plate surface constituent layer) made of a material such as copper.
The whole cylinder is dipped in a predetermined solution or sprayed with a predetermined solution to dissolve and wash impurities and the like adhering to the surface layer, followed by washing with water.

After that, this cylinder was sent to the photosensitive material coating step to apply the photosensitive material for printing in the next step.

[Problems to be Solved by the Invention]

However, in the above-described photosensitive material coating step, since the draining of the cylinder surface layer, the coating of the photosensitive material, and the drying of the photosensitive material are performed in the open space, impurities are again attached to the surface layer of the cylinder washed with water. There was a problem that there were things. Draining, coating the photosensitive material, and drying the photosensitive material are each performed manually.In particular, when coating the photosensitive material, measure the cylinder length etc. with a measure to set the coating range, and visually check the coating thickness. There was a problem that a very complicated work of making a decision by

Therefore, in this photosensitive material coating step, it has been a subject to reduce various works and improve the photosensitive material coating efficiency.

[Means for solving the problem]

The present invention has been made in view of the above-mentioned problems, and a chemical treatment liquid such as alkali, pretreatment by water supply, photosensitive material coating, baking, development, corrosion, etc. In the coating line that goes through in order, when applying the photosensitive material to the cylinder that has undergone pre-treatment such as washing with a predetermined solution and washing with water, the heater, the axial direction of the cylinder and this axis are provided in the closed coating tank formed on the coating line. And an air blowing nozzle movably provided in a direction orthogonal to the air blowing nozzle, and a detector having a position detection sensor that moves integrally with the air blowing nozzle, are provided integrally with the air blowing nozzle, or respectively. The divided tank is equipped with a photosensitive material spraying nozzle that moves in the axial direction of the cylinder, and is placed in the closed coating tank and rotated. The air blowing nozzle, which is placed opposite the air blowing nozzle, moves in the axial direction of the cylinder to drain water, and the detector receives the signal from the position detection sensor that moves with the air blowing nozzle. , The cylinder facing surface position signal and both ends position signal of the cylinder are detected and sent to the control unit, and based on the cylinder diameter value and the cylinder center position calculated by the control unit from the facing surface position signal and both end position signals. The photosensitive material spray nozzle is moved at a moving speed corresponding to a predetermined coating thickness, and is moved symmetrically from a cylinder center position for a predetermined distance to apply a photosensitive material to a predetermined area of the cylinder, and after applying the photosensitive material,
The problem is solved by drying the photosensitive material with a heater.

[Work]

In the present invention, draining of the cylinder surface, photosensitive material application, drying is performed in a shielded space, and at the time of draining, while operating the air spray nozzle, for operating the next photosensitive material spray nozzle Data is taken and the photosensitive material is applied based on this data. That is, when the position detection sensor that is close to the surface of the rotatably installed cylinder in the direction perpendicular to the axial direction reaches a certain distance, the surface of the cylinder reaches a certain distance to this position detection sensor. Is sent from the detector to the control unit as a facing surface position signal, and when the air blowing nozzle moves in the axial direction of the cylinder and blows air over the entire length of the cylinder, the position detection sensor detects the position of both ends of the cylinder. The position is detected, and the position is sent from the detector to the controller as a both-end position signal.

After that, the control unit calculates and calculates the cylinder diameter value and the center position of the cylinder based on the opposite surface position signal and both end position signals, and moves the photosensitive material spraying nozzle at a speed based on the cylinder diameter value. (The moving speed is controlled so that a predetermined coating thickness can be obtained.) At the same time, the photosensitive material spray nozzle is moved symmetrically from the central position for a predetermined distance, and the photosensitive material is applied to a predetermined area of the cylinder. After applying the material, the photosensitive material is dried by a heater.

〔Example〕

Next, the present invention will be described in detail based on the embodiments shown in FIGS. 1 and 2.

In the figure, 1 is a hermetic coating tank formed on a coating line. As shown in FIG. 1, the hermetic coating tank 1 has a cylinder 2 inserted from above by a carrier (not shown). The rear upper part is provided so that it can be hidden. Further, a heater 3, an air spray nozzle 4 and a photosensitive material spray nozzle 5 are provided in opposition to each other in the hermetic coating tank 1 with the cylinder 2 interposed therebetween, and the heater 3, air spray nozzle 4 and photosensitive material spray nozzle 4 are provided. Each of the attachment nozzles 5 is arranged in a chamber 7 that can be opened and closed by a shutter 6.

And the air spray nozzle 4 and the photosensitive material spray nozzle 5
Are provided so as to be independently movable in the axial direction of the cylinder 2 and in the direction perpendicular to this axial direction.

In the figure, 9 is a detector, and the detector 8 is the air blowing nozzle 4
And the amount of movement of the photosensitive material spraying nozzle 5 is converted into a signal by an encoder or the like (not shown) and sent to the control unit 9 described later, and the diameter and length of the cylinder are relatively detected. Is. In the detection, a position detection sensor (electrostatic capacitance type sensor) 10 integrally attached to the air blowing nozzle 5 is positioned so as to be opposed to the cylinder 2, and the position detection sensor (capacitance type sensor) 10 is obtained along with the operation of the air blowing nozzle 4. The signal from the position detection sensor is received.

The control unit 9 controls the operation of the air blowing nozzle in a predetermined operation pattern based on the signal obtained from the detector 8, and at the same time, calculates the diameter of the cylinder by a predetermined calculation from the signal obtained from the detector 8. , Calculate the length, control the operation of the photosensitive material spray nozzle after draining based on this data, and further control the moving speed of the photosensitive material spray nozzle so that a predetermined coating thickness can be obtained when coating the photosensitive material. Is to do.

In the coating tank 1 of this configuration, the operation from draining to drying will be described with reference to FIG. 2. When the cylinder 2 is rotatably arranged in the closed coating tank 1,
While rotating this cylinder 2 at a constant speed,
When the air blowing nozzle 4 moves forward to the cylinder 2 side and the position detection sensor 10 reaches a predetermined distance from the surface of the cylinder 2, the detector 8 sends a facing surface detection signal to the controller 9, and this signal is sent. In response to this, the control unit 9 causes the air blowing nozzle 4 to
Stop moving forward. Further, the control unit 9 determines the cylinder diameter based on the amount of advance obtained from the detector 8 at the time of receiving the counter surface detection signal indicating that the distance between the cylinder surface and the position detection sensor 9 has reached a predetermined distance. calculate.

The air blowing nozzle 4 that has stopped moving forward moves along the entire length of the cylinder in the axial direction of the cylinder while blowing air. The movement of the air blowing nozzle 4 moves from the forward stop position A to one end side of the cylinder 2 and then to the other end side of the cylinder 2 to finish draining.
When the air blowing nozzle 4 moves in the axial direction, both end positions B and C of the cylinder 2 are sent from the position detection sensor 10 through the detector 8 to the control unit 9 as both end position signals.

The control unit 9 calculates the cylinder length from the end positions B and C, and then calculates the center position D of the cylinder 2.

When the operation of the air blowing nozzle 4 is completed, the photosensitive material spraying nozzle 5 operates under the control of the controller 9. In this control unit 9, the moving width of the photosensitive material spraying nozzle is set in advance corresponding to the width of the photosensitive material coating area for each set cylinder, and the central position D and the forward / stop position of the air blowing nozzle ( That is, the distance from the initial setting position) A is calculated, the photosensitive material spraying nozzle 5 is corrected and moved from the position A to the center position D, and right and left so as to correspond to the predetermined coating area E from the time of being located at the center of the cylinder 2. The photosensitive material is applied symmetrically while moving a predetermined distance F at a speed at which a predetermined coating thickness is obtained.

After the application of the photosensitive material is completed, the shutter 6 of the chamber 7 of the air spray nozzle 4 and the photosensitive material spray nozzle 5 is closed, the shutter 6 of the chamber 7 of the heater 3 is raised, and the photosensitive material by the heater 3 is heated. After drying for a predetermined time, the cylinder 2 is pulled up and automatically carried out to the next step.

〔The invention's effect〕

As described above, according to the present invention, a chemical treatment liquid such as alkali, pretreatment by water supply, photosensitive material coating, baking,
In a coating line in which predetermined steps such as development and corrosion are arranged and a cylinder goes through each step in order, when a photosensitive material is applied to a cylinder that has undergone pretreatment such as washing with a predetermined solution and washing with water, it is formed on the coating line. A detector having a heater, an air blowing nozzle movably provided in an axial direction of the cylinder and a direction perpendicular to the axis, and a position detection sensor that moves integrally with the air blowing nozzle in a closed coating tank. And a photosensitive material spraying nozzle that moves in the axial direction of the cylinder, in the integrated tank or in each of the divided tanks,
The position detection sensor, which is arranged in the hermetic coating tank and is installed in opposition to the rotating cylinder at a certain distance, moves in the axial direction of the cylinder to drain water, and moves along with the air spray nozzle. The signal from the detector floats, the detector detects the position signal of the opposed surface of the cylinder and the position signals of both ends of the cylinder, and sends it to the control unit, and the control unit calculates from the position signal of the opposed surface and both end position signals. Based on the cylinder diameter value and the cylinder center position, the photosensitive material spraying nozzle is moved at a speed corresponding to the predetermined coating thickness, and is moved symmetrically from the cylinder center position for a predetermined distance to apply the photosensitive material to a predetermined area of the cylinder. After applying the photosensitive material, the photosensitive material is dried with a heater, so that dust such as impurities does not adhere to the cylinder surface after washing with water, and it is in a clean state. As well as being able to apply the photosensitive material, it becomes possible to obtain a cylinder in which the photosensitive material is applied in a predetermined area of the cylinder in a predetermined thickness and in a uniform state without human intervention, and the efficiency of applying the photosensitive material is greatly improved. The effect is excellent in practicality.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a closed coating tank on a coating line for carrying out the method for applying a photosensitive material to a cylinder according to the present invention, and FIG. 2 shows operations of an air spray nozzle and a photosensitive material spray nozzle. FIG. 1 ... Hermetic coating tank 2 ... Cylinder 3 ... Heater 4 ... Air spray nozzle 5 ... Photosensitive material spray nozzle 8 ... Detector 9 ... Control unit 10 ... Position detection sensor

Claims (1)

[Claims] 1. A coating line in which predetermined steps such as chemical treatment liquid such as alkali, pretreatment with water supply, photosensitive material coating, baking, development, and corrosion are arranged, and a cylinder undergoes each step in order, and cleaning with a predetermined solution is performed. In applying the photosensitive material to the cylinder that has undergone pretreatment such as washing with water, in the closed coating tank formed on the coating line, a heater and air provided so as to be movable in the axial direction of the cylinder and the direction perpendicular to this axis. A blowing nozzle and a detector having a position detection sensor that moves integrally with the air blowing nozzle are provided, and move in the axial direction of the cylinder either integrally with the air blowing nozzle or in each divided tank. And a nozzle for spraying a photosensitive material, which is installed in the closed coating tank and is opposed to a rotating cylinder at a constant distance. The air-blowing nozzle moves in the axial direction of the cylinder to drain water, and the detector receives the signal from the position detection sensor that moves with the air-blowing nozzle, and the detector detects the position signal of the opposed surface of the cylinder and the cylinder. Of the photosensitive material spray nozzle to a predetermined coating thickness based on the cylinder diameter value and the cylinder center position calculated by the controller from the facing surface position signal and both end position signals. Characterized in that the photosensitive material is applied to a predetermined area of the cylinder at a moving speed corresponding to, and a predetermined distance from the center position of the cylinder symmetrically, and the photosensitive material is dried by a heater after the application of the photosensitive material. How to apply the photosensitive material to the cylinder.