JP2004034627A - Method for making plate of rotary screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a good rotary screen generating no pinhole by using an inkjet printer in place of photolithography. <P>SOLUTION: A positive mask is formed by coating by a process wherein a roll to be plated is chucked on its both ends, and an inkjet nozzle of a printer head is closely approached to the roll to be plated, and required relative scanning motions are given to the roll to be plated and the inkjet nozzle, and ink durable to a nickel plating bath is jetted from the inkjet nozzle. Then, the roll to be plated on which the positive mask is stuck is immersed into the nickel plating bath incorporated with an additive to be spread by applying pressure to provide a nickel plating with a required thickness. Then, the nickel plating deposited on the roll to be plated is released, and a chrome plating is applied to obtain a rotary screen. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
The present invention relates to a rotary screen plate making method capable of quickly and easily manufacturing a good rotary screen having no pinholes by using an inkjet printer instead of photolithography.
[0002]
[Prior art]
A conventional rotary screen plate making method is to apply a photosensitive film having a resistance to a nickel plating bath on a roll to be plated such as a stainless steel roll for forming a rotary screen, form a latent image by laser exposure, and develop the latent image. Form a positive resist mask, apply plating by applying pressure to the roll to which the positive resist mask is applied. A nickel plating is applied to the roll so as to have a required thickness, and then the nickel plating applied to the plating roll is spread by applying pressure to form a nickel-plated rotary screen peeled from the plating coating roll. Fit the screen support cylinder to both ends of the plated rotary screen, then Whole to have been subjected to chrome plating.
[0003]
[Problems to be solved by the invention]
Plate making by photolithography requires many steps and requires work in a dark room. Further, there is a problem that a pinhole is generated in the coating of the photosensitive film. Further, there is a problem that when the developer is deteriorated, the compatibility with the photosensitive agent is quickly deteriorated and a good positive mask cannot be formed.
[0004]
An object of the present invention is to provide a plate making method for a rotary screen that can quickly and simply manufacture a good rotary screen without pinholes by using an inkjet printer instead of photolithography.
[0005]
[Means for Solving the Problems]
According to the invention described in claim 1, the rolls to be plated are chucked at both ends by roll chuck rotating means of the ink-jet printer for plate making, and the inkjet nozzle is brought close to the roll to be plated. A relative scanning operation is performed, and an ink having a resistance to a nickel plating bath is jetted from an ink jet nozzle based on digital version information to form a positive mask on a roll for plating, and then the plating with the positive mask is applied. The roll is immersed in a nickel plating bath with an additive that spreads when pressure is applied, and nickel plating of the required thickness is applied. Rotary, characterized by a screen It is to provide a clean plate-making method.
According to the invention described in claim 2, the roll for plating to form a rotary screen is chucked at both ends by a roll chuck rotating means of an ink jet printer for plate making, rotated at an appropriate number of rotations, and plated with a wiping cloth. Wipe the cleaning roll or wipe before the chuck, and then bring the inkjet nozzle close to the plating roll and apply the required relative scanning operation to the plating roll and the inkjet nozzle to remove nickel from the inkjet nozzle. Ink having resistance to the plating bath is sprayed based on the digital version information and applied to the plating roll to form a positive mask, and then the positive mask is spread by applying pressure to the plating roll. Immerse in a nickel plating bath with additives With a Rumekki, then, characterized in that the rotary screen is subjected to chrome plating and stripping nickel plating was applied to the plating to be worn rolls is to provide a process for making a rotary screen.
According to a third aspect of the present invention, a plating roll for forming a rotary screen is chucked at both ends by a roll chuck rotating means of an ink jet printer for plate making, rotated at an appropriate number of revolutions, and wiped from a raw reel. Take out the tape of the cloth, slide it on one end of the plating roll, run it, roll it up, move the tape sliding position to the other end of the plating roll, and attach it to the plating roll with tape. Wipe away dirt and oils and fats, and then bring the inkjet nozzle close to the plating roll and apply the required relative scanning operation to the plating roll and the inkjet nozzle to make the inkjet nozzle resistant to the nickel plating bath. Is sprayed based on the digital version information and is applied to the plating roll. A dimask is coated and formed, and then the roll to which the positive mask is applied is immersed in a nickel plating bath containing an additive that spreads when pressure is applied to apply a nickel plating of a required thickness. The present invention is to provide a plate making method for a rotary screen, characterized in that a rotary screen is formed by peeling off nickel plating adhered to a rotary screen and performing chrome plating.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the method for making a rotary screen according to the present invention will be described.
First, a stainless roll having a required diameter and length or a roll having a mirror-polished outer surface of chrome plating for forming a rotary screen. The roll to be plated is rotated by a roll chuck of an inkjet printer for plate making. Both ends are chucked by means.
The plating roll is rotated at an appropriate number of revolutions, and the plating roll is wiped with a wiping cloth or wiped before the chuck. This wiping removes dirt and oils and fats adhering to the plating roll, allows the ink ejected from the ink jet nozzles to adhere extremely well, and completely eliminates the cause of pinholes.
Next, the inkjet nozzle is brought close to the plating roll, and a required relative scanning operation is applied to the plating roll and the inkjet nozzle to withstand the nickel plating bath from the inkjet nozzle. A positive mask is applied and formed by spraying based on the information and attaching to a roll for plating.
The relative scanning operation may be any of a spiral scan and a raster scan. Since the diameter and length of the plating roll are variously different, the printer head is provided on a two-dimensional table, and the proximity sensor detects the proximity position of the inkjet nozzle to the plating roll.
Next, a positive electrode-coated plating roll is immersed in a nickel plating bath to which an additive that spreads when pressure is applied is immersed and rotated to be electroplated so as to have a required thickness, and a negative image is formed on the plating roll. Is formed.
Then, by applying pressure to the nickel plating adhered to the plating roll, the nickel plating of the negative image is peeled off from the roll to which plating is applied by peeling the nickel plating of the negative image very slightly, and the holes (cells) of the positive image are removed. Then, a screen support cylinder is fitted to both ends of the rotary screen base, and then chrome plating is applied to the whole to obtain a rotary screen base.
[0007]
FIG. 1 is a front view of an ink-jet printer for plate making for carrying out the method of making a rotary screen according to the present invention.
FIG. 2 is an enlarged side view of a main part before starting the operation of the wiping head.
FIG. 3 is an enlarged side view of a main part of the cleaning head during operation.
In FIG. 1, a casing denoted by reference numeral 1 has a roll feed-in / out opening 1a at the upper part on the front surface and a roll feed-out door 2 which rises to close the roll feed-in / out opening 1a.
Roll chuck rotating means 3 is provided in the casing 1. The roll chuck rotating means 3 chucks the roll R to be plated by the drive chuck 3a, which is rotatably driven by a motor (not shown), and moves on the movable table 3b according to the roll length, and the tail chuck 3c. During printing, the rotation speed at which the required low speed, for example, the peripheral speed is 0.5 m / s, is calculated by inputting the diameter of the plating roll R, and the rotation is performed at the rotation speed.
The movable table 3b is configured such that the movable table 3b is guided by a horizontal linear guide 3d provided on the rear wall of the casing 1 and a ball screw 3e provided between the linear guides 3d. A ball nut 3f to be screwed is provided on the movable table 3b, and the ball screw 3e is rotated by a servomotor 3g, so that the ball nut 3f becomes a runner.
[0008]
Below the roll R to be plated, which is chucked by the roll chuck rotating means 3, the moving table 5 mounted on the rail 4 can reciprocate along the roll R to be plated by driving a ball screw. A movable bracket 7 is provided on an elevating table 6 mounted on the moving table 5, and the movable bracket 7 is equipped with a wiping head.
In the configuration for raising and lowering the lifting table 6, the lifting table 6 is guided by a vertical linear motion guide 8 provided on the moving table 5, and a ball screw (not shown) is on the vertical axis of the moving table 5. And a ball nut (not shown) screwed to the ball screw is provided on the lifting table 6, and the ball screw is rotated by a servo motor (not shown) so that the ball nut becomes a runner.
The movable bracket 7 is configured to further move up and down with respect to the elevating table 6 that performs the above-described elevating. In the configuration in which the movable bracket 7 is raised and lowered, a male guide 10 provided on the movable bracket 7 is guided by a female guide 9 provided on the lifting table 6, and the lifting table 6 and the movable bracket 7 are connected by the cylinder device 11. The movable bracket 7 is connected to and moved up and down with respect to the elevating table 6 by expansion and contraction of the cylinder device 11.
The movable bracket 7 is moved up before the elevating table 6 by the extension operation of the cylinder device 11. Then, when the elevating table 6 is moved up and down, the plating chucked by the roll chuck rotating means 3. It has a bay portion 7a for receiving the wearing roll R.
The proximity sensor 12 is attached to the movable bracket 7 so as to correspond to the center of the bay 7a. The proximity sensor 12 outputs a detection signal when the gap with the lower surface of the plating roll R to be received in the bay portion 7a becomes, for example, 3 mm. Based on this detection signal, the lifting table 6 is raised. It is designed to stop.
Therefore, the movable bracket 7 is made to have a large ascending stroke by the extension of the cylinder device 11, and then the movable bracket 7 is moved up to the maximum in the bay portion 7 a of the movable bracket 7 regardless of the diameter of the plating mounting roll R. A stroke corresponding to the diameter of the plating roll R is shared by the lifting table 6, so that the operation time is shortened and the positioning stroke is shortened.
The moving speed of the moving table 5 is changed according to the number of rotations of the plating roll R so that, for example, the plating roll R moves by 8 to 10 mm when it makes one rotation.
[0009]
The wiping head draws out a tape T of a wiping cloth having no self-dusting property from a web reel 13 attached to the movable bracket 7 and a pair of guide rolls 14 provided on an opposing portion sandwiching the bay portion 7a of the movable bracket 7, 15, the tape T is wound around a winding bobbin 17 driven to rotate by a first torque motor 16, and a braking free roll 21 to which a nip pressure is applied to a guide roll 14 by a cylinder device 20. The tape T is pressed and pressed, and the rotation of the guide roll 14 is braked to apply a brake to the feeding of the tape T from the material reel 13.
The braking free roll 21 has play in the shaft and the bearing so as to be separated from the guide roll 14 by, for example, 0.5 mm, and the braking free roll 21 is urged by the cylinder device 20 being extended, and the braking free roll 21 is urged. Reference numeral 21 applies a nip pressure to the guide roll 14.
The roll chuck rotating means 3 rotates the plating roll R in the direction opposite to the running direction of the tape T unwound from the raw fabric reel 13 so that a load is applied to the first torque motor 16. .
[0010]
The rewinder shaft 18 is configured so as to be connected to and disengaged from the output shaft of the second torque motor 19, to be able to be pulled out and removed in the axial direction, and to insert and support the center hole of the material reel 13. The second torque motor 19 has a smaller torque than the first torque motor 16 and is provided so as to rotate in a direction in which the feeding of the tape T from the raw reel 13 is braked.
Since the tape T is fed out from the material reel 13 by the first torque motor 16, the second torque motor 19 rotates the creep in a direction opposite to the rotational direction in which the tape T is driven, thereby causing the tape T to rotate. Braking can be applied to the payout. Accordingly, the application of braking to the feeding of the tape T is performed by pressing the guide roll 14 with the braking free roll 21 to which the nip pressure is applied by the cylinder device 20 and the second torque motor 19 synergistically.
[0011]
The wiping cloth is a cloth made of polyester of ultra-fine and long fibers or polyester and nylon and having no self-dusting property. A suitable wiping cloth is Savina Minimax (registered trademark), a wiping cloth manufactured by Kanebo Co., Ltd., which is an ultra-fine fiber of 0.1 denier (1 to 5 μm in thickness) and a long fiber. It is made of polyester and nylon, has a wedge-shaped cross section of the original yarn, takes in dust, and has no self-dusting property. In addition, a wiping cloth manufactured by Toray Industries, Inc. is a cloth made of polyester of ultra-fine long fibers and having no self-dusting property, and is applicable.
The material reel 13 is formed by winding a wiping cloth tape T around a bobbin, and can be purchased and used from Kanebo Corporation or Toray Industries, Inc.
[0012]
On the upper side of the plating roll R chucked by the roll chuck rotating means 3, a printer head 22 in which an inkjet nozzle 22a is opposed to the plating roll R is provided, and the plating nozzle is rotated by the inkjet nozzle 22a. The ink moves toward the one end of the roll R, ejects ink having resistance to the etching liquid, and moves to the other end of the roll R for plating to form an image.
Movement of the printer head 22 toward and away from the plating roll R is performed by raising and lowering a lifting table 24 supporting the printer head 22 via a bracket 25 by lifting driving means mounted on the carriage 23. It is.
The elevating / lowering driving means is such that a ball screw provided on the carriage 23 and a ball nut fixed to the elevating table 24 are screwed together, and when the ball screw is driven by the servo motor 29, the ball nut becomes a runner. It is done in.
Further, the reciprocating movement of the printer head 22 along the roll R to be plated is performed by reciprocating the carriage 23 by the reciprocating drive means.
The reciprocating drive means includes a ball screw 27 in which a carriage 23 is engaged and guided by a linear motion guide 26 mounted on a rear wall of the casing 1 and a ball screw 27 supported on the rear wall of the casing 1 and a ball fixed to a lifting table 24. When the ball screw 27 is driven by the servomotor 28 when the nut is screwed, the ball nut becomes a runner.
[0013]
The operation of the plate-making inkjet printer device for carrying out the method of making a rotary screen plate will be described.
First, wiping is performed from one end to the other end of the plating roll R on which the wiping head is rotated, and then ink is sprayed from the ink jet nozzle 21 of the printer head 22 to rotate the plating roll. A positive image having resistance to the nickel plating solution is formed on R.
[0014]
The operation of the wiping head will be described in detail.
The raw material reel 13 is attached, and the tape T of the wiping cloth is wound around the free roll 21 for braking, is wound around the guide rolls 14 and 15, and the tape feeding end is wound around the winding bobbin 17.
Roll chuck rotating means 3 chucks both ends of the roll R to be plated and rotates. The rotation speed at this time may be a relatively low rotation speed, and is not limited to a specific rotation speed. Next, the moving table 5 moves to a position corresponding to one end of the plating attachment roll R.
The cylinder device 11 is extended to raise the movable bracket 7 with respect to the elevating table 6, and then the elevating table 6 ascends. The roll R to be plated relatively enters the bay portion 7a of the movable bracket 7, and the plating is performed. When the gap with the lower surface of the wearing roll R becomes, for example, 3 mm, the proximity sensor 12 outputs a detection signal, and the lifting table 6 stops rising.
At substantially the same time when the lifting table 6 is raised, the first torque motor 16 and the second torque motor 19 are driven, the cylinder device 20 is extended, tension is applied to the tape T of the wiping cloth, and tape running starts.
When the elevating table 6 moves up, the plating roll R comes into contact with the tape T wrapped around the guide rolls 14 and 15 and relatively enters the bay 7a of the movable bracket 7, so that the tape T is plated. The roller R slides on the circumferential surface. The rotation of the roll R for plating is in a direction opposite to the running direction of the tape T. Accordingly, the tape T slides and travels on the rotating roll R to be plated without loosening the tension, and starts wiping dirt and oils and fats adhered to the roll R to be plated.
The elevating table 6 stops moving up, and after a lapse of several seconds, the movable table 5 moves from a position corresponding to one end of the plating roll R to a position corresponding to the other end. Therefore, the wiping cloth is wiped with the tape T from one end to the other end of the roll R for plating.
Next, after the lifting table 6 is lowered and returned, the cylinder device 11 is contracted and the movable bracket 7 is lowered with respect to the lifting table 6, and the tape T wrapped around the guide rolls 14 and 15 is transferred from the plating rolls R. When returning to the state of being stretched horizontally apart, the first torque motor 16 and the second torque motor 19 stop driving, the cylinder device 20 operates to contract, the tape running stops, and the moving table 5 returns to its original state. Return to the position.
[0015]
Next, the process of ejecting ink from the ink jet nozzle 21 of the printer head 22 to draw a positive image on the plating roll R rotated by rotation will be described in detail.
The carriage 23 is moved by the drive of the servomotor 28, and the ink jet nozzle 21 comes to a position corresponding to one end of the plating roll R, and the carriage 23 is stopped. The elevation table 24 is lowered by the drive of the servomotor 29, the ink jet nozzle 21 approaches the roll R to be plated, and the elevation table 24 is stopped.
Ink is jetted from the ink jet nozzle 21 to the rotating roll R to be plated, and the carriage 23 is moved by the drive of the servo motor 28, so that the ink jet nozzle 21 moves to the other end of the roll R to be plated. And draw the image. After wiping with the wiping cloth, ink is ejected to describe the plate information, so that pinholes do not occur.
When the drawing of the image is completed, the elevation table 24 is lifted and returned by the driving of the servomotor 29, and the ink jet nozzle 21 is separated from the roll R for plating. Next, the carriage 23 is returned and moved by the driving of the servo motor 28, the printer head 22 is returned to the standby position, and the carriage 23 is stopped.
The operations of the above-mentioned plating roll R and the ink jet nozzle 21 are spiral scans. Raster scan or the like may be used.
[0016]
The roll R to be plated is chucked at both ends by the roll chuck rotating means 3, and an ink tank of a cartridge storing ink that does not corrode the nickel plating bath (PH 4.0), for example, ink containing carboxylic acid, is set. A positive mask is formed on the roll to be mounted by the ink jet nozzle 21. Thereafter, burning is preferably performed to achieve strong adhesion.
As described above, in the plate making of a rotary screen, a nickel-plated negative image is formed on a roll to be plated and peeled off to form a rotary screen base having holes (cells) for a positive image, and screen support cylinders are fitted to both ends. Then, chrome plating is applied to the whole to complete the rotary screen.
[0017]
In the case of the above-mentioned spiral scan, even if the diameter of the roll R to be plated is variously varied, the roll R to be plated which is chucked by the roll chuck rotating means 3 at both ends is adjusted to the linear forming speed of the ink jetted from the ink jet nozzle 21. Adjust the peripheral speed of. In addition, in response to the rotation speed being different due to the different diameters of the plating rolls R, the moving speed of the ink jet nozzles 21 along the plating rolls R is changed so that the plating rolls R are moved. Even if the diameters are different, the overlap of the pixels is made the same.
[0018]
【The invention's effect】
According to the method for making a rotary screen described in [Claim 1], [Claim 2] or [Claim 3],
A good positive mask that is not eroded by the nickel plating solution can be formed on the roll to be plated by jetting the ink with an inkjet printer, so that a rotary screen can be manufactured very quickly and easily, and the conventional photosensitive film coating, laser exposure and development The process can be omitted in one step, problems such as adhesion of the photosensitive film, incompatibility between the photosensitive film and the developing solution, deterioration of the developing solution, etc. can be avoided, high reliability for plate making of the rotary screen can be secured, and plate making time can be secured. This leads to a significant reduction in the size of the plate making line space.
According to the method for making a rotary screen according to [claim 2] or [claim 3],
Before forming a negative mask on the plating roll, the wiping cloth is used to wipe off dirt and grease from the plating roll. Since a good positive mask that is not eroded can be formed, the occurrence of pinholes, that is, points where ink is not applied to portions where ink is to be applied can be avoided with an extremely high probability, and a high-quality rotary screen can be quickly and easily manufactured. Can be manufactured.
[Brief description of the drawings]
FIG. 1 is a front view of a plate-making ink jet printer for carrying out a method of making a rotary screen according to the present invention.
FIG. 2 is an enlarged side view of a main part before the operation of the cleaning head is started.
FIG. 3 is an enlarged side view of a main part of the cleaning head during operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Casing, 1a ... Roll taking-in / out opening, 1b ... Roll taking-in / out opening, 2 ... Roll taking-in / out door, 3 ... Roll chuck rotating means 3a ... Drive side chuck, 3b ... Movable table, 3c ... Tail chuck, R ... Plating roll, 3d ... Linear guide, 3e ... Ball screw, 3f ... Ball nut, 3g ... , 4 ... rail, 5 ... moving table, 6 ... elevating table, 7 ... movable bracket, 7a ... bay part, 8 ... linear guide, 9 ... female guide, 10: Male guide, 11: Cylinder device, 12: Proximity sensor, 13: Material reel, T: Wiping cloth tape, 14, 15: Guide roll, 16 ... .First torque motor, 17 ... winding Take-up bobbin, 18 ... rewinder shaft, 19 ... second torque motor, 20 ... cylinder device, 21 ... free roll for braking, 22 ... printer head, 22a ... inkjet nozzle, 23: carriage, 24: lifting table, 25: bracket, 26: linear guide, 27: ball screw, 28: servo motor, 29: servo motor

Claims (3)

The plating roll is chucked at both ends by the roll chuck rotating means of the ink-jet printer for plate making, the inkjet nozzle is brought close to the plating roll, and a required relative scanning operation is applied to the plating roll and the inkjet nozzle to cause nickel from the inkjet nozzle. An ink having a resistance to the plating bath is sprayed on the basis of the digital version information to form a positive mask on the plating roll, and then an additive that spreads when pressure is applied to the plating roll on which the positive mask is deposited is applied. A rotary screen, which is immersed in the added nickel plating bath to apply nickel plating of a required thickness, and then peels off the nickel plating adhered to the roll for plating to form chrome plating to form a rotary screen. Plate making method. A roll to be plated for forming a rotary screen is chucked at both ends by a roll chuck rotating means of an ink jet printer for plate making, and is rotated at an appropriate number of rotations to wipe off the roll to be plated with a wiping cloth, or a chuck. Before wiping, the ink jet nozzle is brought close to the roll to be plated and the required relative scanning action is applied to the roll to be plated and the ink jet nozzle to obtain an ink that is resistant to the nickel plating bath from the ink jet nozzle. A positive mask is applied and formed by spraying on the basis of the above to form a positive mask on the plating roll, and then the plating roll with the positive mask is immersed in a nickel plating bath to which an additive that spreads when pressure is applied. Nickel plating to the required thickness Characterized in that the rotary screen is subjected to chrome plating and stripping nickel plating deposited on the key to be worn roll, rotary screen process for making. The roll to be plated for forming a rotary screen is chucked at both ends by the roll chuck rotating means of the ink-jet printer for plate making, rotated at an appropriate number of revolutions, and the tape of the wiping cloth is fed out from the raw reel to form the roll for plating. Move the tape in sliding contact with one end to take up, move the tape sliding contact position to the other end of the plating roll, wipe the dirt and oils and fats adhered to the plating roll with tape, and then The inkjet nozzle is brought close to the plating roll and the required relative scanning operation is applied to the plating roll and the inkjet nozzle, and the inkjet nozzle jets an ink having a resistance to the nickel plating bath based on the digital version information to perform plating. A positive mask is applied and formed on a mounting roll, and then Then, applying pressure to the roll to which the positive mask is applied, and immersing it in a nickel plating bath containing an additive that spreads when applying pressure, applying nickel plating of a required thickness, and then applying the nickel plating applied to the roll to which plating is applied. A plate making method for a rotary screen, wherein the rotary screen is formed by peeling and chromium plating.

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