JP2000062342A - Method for gravure engraving - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for gravure engraving for rapidly and accurately polishing with griding machine without buffing. SOLUTION: The method for gravure engraving comprises the steps of chucking both ends of a roll W to be engraved to rotate it, pressing the roll W by a grindstone end face of a freely rotatable PVA polishing grinding wheel 27a and freely running the grinding wheel 27a with rotation of the roll while applying lubricating liquid to a pressing position to move the grinding wheel 27a, thereby generating a finely relative speed at line contact positions of the roll W with the grinding wheel 27a to mirror polish the roll W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to plate-removing polishing for a reused plate-making roll without ballad plating.
A gravure plate making method for producing a gravure plate making roll through a series of plate making steps of plate depth forming plating-cylindrical polishing-mirror surface polishing-formation of cells by an etching method or an engraving method,
In particular, the time required for plate-down polishing can be greatly reduced, and
The number of polishing wheels that need to be replaced in order to enable finer polishing in order from plate polishing to cylindrical polishing after plating to completion of mirror polishing greatly reduces polishing time and greatly reduces polishing time. In order to achieve intermediate precision, it is possible to obtain the necessary and sufficient polishing precision in each polishing step by aligning three types of polishing, cylindrical polishing and mirror polishing for achieving intermediate precision. You can save a lot of time,
In addition, the present invention relates to a gravure plate making method which makes it possible to fully automate the whole plate making process by eliminating mirror surface polishing by a buff and realizing mirror surface polishing with a grindstone.

[0002]

2. Description of the Related Art Conventionally, with respect to a reused plate making roll,
Without performing ballad plating, a series of plate making steps of dechromization treatment-plate removal polishing-plating of copper or copper alloy or nickel or nickel alloy-cylindrical polishing-mirror polishing-formation of cells by etching method or engraving method- The gravure plate-making method for producing a gravure plate-making roll has been carried out even though not fully automated.

A specific example will be described below in the order of steps. 1) Dechromization A plate-making roll, which is a used printing roll, is immersed in a hydrochloric acid solution in a dechromization tank to dissolve the chromium plating on the roll surface. 2) With the plate-down polishing grindstone polishing device, the plate-making roll is cylindrically polished with a polishing grindstone No. 220 to remove the existing cells, and then 500
Change to No. polishing wheel and cylindrically polish to make the surface roughness fine. 3) Plate depth forming plating Since the diameter of the roll is reduced due to plate removal, copper plating is performed including the final polishing allowance. 4) With a cylindrical grinding wheel polishing device, the plate-making roll is cylindrically ground with a grinding wheel of No. 800 to No. 1000 to remove existing cells, and then the grinding wheel of No. 2000 to 2500 is switched to perform cylindrical grinding. Make the surface roughness fine. 5) Mirror surface polishing With a buffing device, the buffing abrades the unevenness of the surface roughness of cylindrical polishing to a mirror surface. 6) Cell formation To form cells by the etching method, a plate-making roll is coated with a photosensitive film, an image is printed with a laser exposure device, developed, and then etched with a cupric chloride solution. To form cells by the engraving method, the cells are engraved on a plate-making roll by an electronic engraving machine (Heliorisch graph). 7) Chrome plating Copper plating is soft and does not have printing durability, so hard chrome plating is applied to impart printing durability. The plate-making roll is chucked by a cassette type roll chuck device and immersed in a chrome plating solution in a chrome plating tank for electrochromic plating. The diameter increase due to plating is about 12-14 μm.

[0004]

In the plate making process described above, plate-down polishing, cylindrical polishing, and mirror-surface polishing are offline, and full automation has not been realized. The first reason is that in order to obtain high cylindrical accuracy, a grindstone polishing device having extremely high cylindrical accuracy is used, and an extremely small polishing allowance is made by correcting the amount of the surface of the grinding wheel gradually collapsing. It was necessary to eliminate the difference in diameter between the middle and both ends of the plate-making roll by repeating the cylindrical polishing so that Then, after cylindrical polishing, it is necessary to remove the plate making roll and place it on a measuring instrument to measure the cylinder accuracy.If the cylinder accuracy is not obtained, the plate making roll is again precision cylinder-polished and re-cylindered. Since the measurement of accuracy was repeated, it was very complicated and time-consuming. Further, when the cylindrical polishing was repeated, the diameter of the plate-making roll was likely to be too small. Further, when the cylinder precision of the plate-making roll before the cylindrical polishing is low, the cylindrical precision does not always become high even if the corrected cylindrical polishing is performed. When the plate printing is repeated, the area with many patterns is greatly polished, and the cross section of the plate making roll becomes irregular and becomes distorted, making it unsuitable for reuse and discarding the plate making roll or making a perfect circle with an off-line lathe. It is necessary to process it again. The other reason is that mirror polishing is buffing,
Dust countermeasures, oils and fats need to be removed, heat removal measures by buffing are required,
The time required for mirror polishing is long, skill is required, and system construction is more expensive than the ballad method.

According to the present invention, a plate to be reused is not subjected to ballad plating, and is referred to as plate removal polishing-plate depth forming plating-cylindrical polishing-mirror polishing-cell formation by an etching method or an engraving method. It is a gravure plate making method that produces a gravure plate making roll through a series of plate making steps, and in particular, the time required for stencil plate polishing can be greatly reduced, and mirror surface polishing is completed after plate shaving and cylindrical polishing after plating. The number of grinding stones that need to be replaced in order to enable even finer polishing in order, the cylinder for plate-cutting polishing to achieve a large polishing allowance and to greatly reduce the polishing time, and for intermediate precision If three types of polishing and mirror polishing are prepared and exchanged twice, sufficient polishing accuracy can be obtained in each polishing process, the polishing time in the entire plate making process can be significantly shortened, and buffing can be eliminated. And has an object to provide a gravure engraving method permits full automation of all plate-making process by implementing a mirror-polished by the grindstone.

[0006]

The first invention of the present application is called plate removal polishing-plate depth forming plating-cylindrical polishing-mirror polishing-cell formation by etching or engraving-for a plate-making roll. In a gravure plate-making method of producing a gravure plate-making roll through a series of plate-making steps, at least one of the plate-removing polishing and the cylindrical polishing, the plate-making roll by a chuck cone provided at the opposite ends of a pair of spindles of a grindstone polishing device. Chuck both ends and rotate, press the end face of the grinding wheel that is driven to rotate by the plate making roll, move while applying the lubricating liquid to cylindrically grind the entire length, then turn the grinding wheel off and turn it free. It is freely rotatable, presses the plate making roll with the end face of the grindstone, and rotates the polishing grindstone along with the rotation of the plate making roll while applying the lubricating liquid to the pressed position, and makes a line contact between the plate making roll and the polishing grindstone. Cause small relative velocity at positions,
By moving the polishing grindstone, while removing the pitch stripes attached to the plate-making roll, polishing to a surface roughness finer than the surface roughness at the time of the cylindrical polishing, to provide a gravure platemaking method characterized by is there.

Further, the second invention of the present application comprises a series of plate-making steps for plate-making rolls including plate-removing polishing-plate depth forming plating-cylindrical polishing-mirror polishing-forming cells by etching or engraving. In the gravure plate making method for producing a gravure plate making roll, the mirror polishing is performed by chucking both ends of the plate making roll by chuck cones provided at opposite ends of a pair of spindles of a grindstone polishing device, and rotating to the plate making roll. After pressing the end surface of the driven PVA polishing grindstone and moving it while applying the lubricating liquid to cylindrically polish the entire length,
The polishing wheel made of A was made to rotate freely by turning off the rotation drive source, and the plate-making roll was pressed by the end face of the wheel and the PVA polishing wheel was made to rotate along with the rotation of the plate-making roll while applying the lubricating liquid to the pressed portion. A gravure plate making method is characterized in that a minute relative velocity is generated at a line contact portion between a plate making roll and a PVA polishing grindstone, and mirror polishing is performed by moving the PVA grinding grindstone.

The third invention of the present application further comprises a series of plate-making steps for plate-making rolls including plate-removal polishing-plate depth forming plating-cylindrical polishing-mirror polishing-cell formation by etching or engraving. In the gravure plate making method of producing a gravure plate making roll, the plate-removing polishing or the cylindrical polishing,
The plate making roll is chucked at both ends by a chuck cone provided at the opposite ends of a pair of spindles of the grindstone polishing device to rotate, and the end face of the polishing grindstone rotationally driven by the plate making roll is pressed to move while applying a lubricating liquid. After grinding the entire length in a cylindrical shape, the grinding wheel is turned freely and can be freely rotated.The end surface of the grindstone presses the plate-making roll, and the lubricating liquid is applied to the pressed parts while the plate-making roll rotates. By rotating, to generate a minute relative speed in the line contact portion of the plate making roll and the polishing grindstone, by moving the polishing grindstone, while removing the pitch stripes attached to the plate making roll during the cylindrical polishing Polishing to a surface roughness finer than the surface roughness, the mirror polishing is performed by chucking both ends of the plate making roll by a chuck cone provided at the opposite ends of a pair of spindles of a grindstone polishing device. P which is rotated to said plate-making roll
After pressing the end face of the VA polishing grindstone and moving it while applying a lubricating liquid to cylindrically polish the entire length, the PVA polishing grindstone is turned freely by turning the rotary drive source and the plate roll is pressed by the end face of the grindstone. In addition, the PVA polishing grindstone is rotated along with the rotation of the plate-making roll while applying the lubricating liquid to the pressed portion,
A gravure plate-making method characterized in that a minute relative speed is generated at a line contact portion between a plate-making roll and a PVA polishing grindstone, and mirror polishing is performed by moving the PVA polishing grindstone.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gravure plate making factory shown in FIG. 1 for carrying out a gravure plate making method common to the first, second and third inventions of the present application will be described with reference to FIG. FIG. 1 shows a schematic layout of various plate-making devices in a gravure plate-making factory. Figure 1
At the handling area of the industrial robot 1,
The roll measuring device 2, the grindstone polishing device 3, the photosensitive film coating device 4, the laser exposure device 5, the roll stock shelf 6, and the roll withdrawing device 7 are arranged, and the roll delivery table is provided in the traveling area of the stacker crane 8 that travels on the ceiling. 9, dechroming device 10, copper plating device 11, developing device 12, corrosion device 1
3, a resist stripping device 14, a chrome plating device 15, and a stock device 16 for a cassette type roll chuck device are arranged. The description of the structure and operation of the cassette-type roll chuck device K and the system for carrying the cassette-type roll chuck device K by the stacker crane 8 and mounting it on the device for plating is omitted. For details, refer to Japanese Patent Publication No. 57-36995. These sequences are appropriately modified and installed. In FIG. 1, a roll-measuring roll is artificially attached to a roll-measuring device 2 to perform measurement. Next, the industrial robot 1 uses the roll measuring device 2
The plate-making roll in the above is placed on the roll delivery table 9. Next, the cassette type roll chuck device K conveyed by the stacker crane 8 chucks the plate-making roll on the roll delivery table 9. Then, the cassette-type roll chuck device K is placed on the dechroming device 10 while chucking the plate-making roll, and dechroming is performed. Next, when the cassette type roll chuck device K delivers the plate making roll to the roll delivery table 9, the industrial robot 1 delivers the plate making roll to the grindstone polishing device 3 to perform plate-down polishing. Next, when the industrial robot 1 delivers the plate-making roll to the roll delivery table 9, the cassette-type roll chuck device K conveyed by the stacker crane 8 chucks the plate-making roll, and the cassette-type roll chuck device K transfers the copper. Electroplated copper placed on the plating device 11 (plate depth forming plating)
Is done. Next, cassette type roll chuck device K
When the plate-making roll is delivered to the roll delivery table 9, the industrial robot 1 delivers the plate-making roll to the grindstone polishing device 3, and cylindrical polishing-mirror polishing is performed. Next, the industrial robot 1 delivers the plate-making roll to the photosensitive film coating device 4, and the photosensitive film coating is performed. Then, the industrial robot 1
Passes the plate-making roll to the laser exposure device 5, and laser exposure is performed. Next, when the industrial robot 1 transfers the plate-making roll to the roll transfer table 9, the cassette-type roll chuck device K conveyed by the stacker crane 8.
Chucks the plate-making roll, and the cassette-type roll chuck device K is placed on the developing device 12 for development.
Next, the cassette type roll chuck device K is used as the corrosion device 1.
3 is transferred and corroded on the plate-making roll to form cells on the plate surface. Next, the cassette type roll chuck device K is transferred to the resist stripping device 14 and the resist is stripped from the plate making roll. Next, the cassette type roll chuck device K is transferred to the resist stripping device 14 to strip the resist. Next, the cassette type roll chuck device K is transferred to the chrome plating device 15 and chrome plating is performed. Next, when the stacker crane 8 places the cassette type roll chuck device K on the roll delivery table 9, the industrial robot 1 delivers the plate-making roll to the grindstone polishing device 3, and deburring of chrome plating is performed to complete plate making. . Next, the industrial robot 1 transfers the plate-making roll to the roll withdrawing device 7, and the plate-making roll is withdrawn from the plate making factory. At night, unmanned platemaking is performed. On the roll stock shelf 6, the plate-making rolls that have been measured by the roll measuring device 2 and the rolls that have completed plate-making are stocked.

Next, a gravure plate making method according to an embodiment common to the first, second and third inventions of the present application will be described with reference to the process chart shown in FIG. 1) Roll handling data measurement Used as a printing roll that is a used printing roll to be used for roll delivery and chucking in industrial robot hands, cassette type roll chuck devices, plating devices, laser exposure devices, and other devices. The roll is attached to the roll measurement, and the roll diameter, the taper hole diameter of the roll end surface, and the roll length are measured. 2) Measurement of roll diameter for precision cylinder polishing in plate-down polishing For example, the roll diameter is measured at a constant pitch from one end surface of the plate-making roll. This measurement may be a step between dechroming and plate-removal polishing. 3) Dechromization A plate-making roll, which is a used printing roll, is chucked by a cassette type roll chuck device and immersed in a hydrochloric acid solution in a dechromization tank to dissolve the chromium plating on the roll surface.
The diameter reduction due to dechromization is about 12 to 15μ in diameter.
m. The reason for removing chromium is to facilitate plate-down polishing in the next step and to facilitate recovery of chromium. Since the number of printed sheets is about 500, there is a plate-making roll not plated with chrome. In the present invention, the chromium removal step is naturally omitted in the plate-making roll that is not plated with chromium. 4) Plate-removing polishing Remove the plate-making roll from the cassette-type roll chucking device and chuck both ends with a chuck cone provided at the opposite ends of a pair of spindles of the grindstone polishing device to rotate the two plates to make two polishings of silicon carbide No. 320. The end surface of the grindstone is pressed against the plate making roll from both sides and driven to rotate, and the end surface of the grinding wheel is pressed against the plate making roll to move while applying a lubricating liquid to cylindrically grind the entire length of the existing cell. Remove, then 3
The grinding wheel of No. 20 is freely rotatable by turning off the rotation drive source, presses the plate-making roll driven and rotated by the end surface of the wheel and sprinkles lubricating liquid on the pressed part, and entrains the grinding wheel in the rotation of the plate-making roll. Then, a minute relative speed is generated in the line contact portion between the plate making roll and the polishing grindstone, and by moving the polishing grindstone, while removing the pitch stripes attached to the plate making roll, during the normal cylindrical polishing Polish to a surface roughness finer than the surface roughness. This will give a roughness of 5
It is possible to obtain the fine surface roughness obtained when polishing is performed by switching to the No. 00 to No. 600 grinding wheels. Therefore, 320
If the above grinding is performed with the No. polishing wheel, the required surface roughness can be obtained as the surface roughness before performing the plate depth forming plating in the next step. Therefore, it is necessary to switch to the No. 500 to 600 polishing wheels. Absent. The plate depth is ten and several μm in a deep cell.
Therefore, the diameter reduction due to the printing plate is 30-40μ in diameter.
m. In the plate-pressing polishing, cylindrical polishing is performed based on roll diameter measurement for performing precise cylindrical polishing in 2) plate-pressing polishing. 5) Plate depth forming plating Since the diameter of the roll is reduced due to plate removal, copper plating is performed including the final polishing allowance. The plate-making roll is chucked by a cassette-type roll chuck device and immersed in a copper plating solution in a copper plating bath for electrolytic copper plating. The present invention includes the case where copper alloy plating, nickel plating, or nickel alloy plating is performed instead of copper plating. The diameter increase due to plating is about 20 to 30 μm larger than the diameter before plate printing. 6) Cylindrical polishing The plate-making roll is removed from the cassette type roll chuck device, both ends are chucked and rotated by the chuck cones provided at the opposite ends of the pair of spindles of the grindstone polishing device, and polishing is made of silicon carbide No. 800 to No. 1000. The grindstone is rotationally driven, and the end surface of the grindstone is pressed against the plate-making roll to move while applying a lubricating liquid to cylindrically grind the entire length.
Rotating the rotary drive source of the No. 1000 polishing grindstone to make it freely rotatable, press the plate-making roll with the end face of the grindstone, and apply the lubricating liquid to the pressed portion while rotating the plate-making roll with the polishing grindstone. A minute relative speed is generated at the line contact portion between the plate-making roll and the polishing grindstone, and the polishing grindstone is moved to reduce the surface roughness while removing the pitch stripes attached to the plate-making roll. Diameter reduction is about 20
30 μm. Therefore, the diameter is substantially equal to the diameter before the plate is released. 7) Mirror polishing The polishing grindstone of the grindstone polishing apparatus is switched from the silicon carbide grindstone to the No. 4000 to 6000 PVA grindstones. Rotate the PVA polishing grindstone by pressing the end face of the PVA polishing grindstone that is rotationally driven against the plate making roll that is chucked at both ends by the grindstone polishing device and moving while applying the lubricating liquid to cylindrically polish the entire length. The drive source is turned off to allow free rotation, the plate edge roll is pressed against the plate edge roll, and a lubricant is applied to the pressed area while rotating the plate edge roll PV.
Rotate the grinding wheel made of A together with the plate-making roll and PVA
A minute relative velocity is generated at the line contact point of the polishing grindstone,
Mirror polishing is performed by moving a PVA polishing grindstone.
Diameter reduction is 2-3 μm. 8) Cell formation In the formation of cells by the etching method, a plate-making roll is coated with a photosensitive film, an image is printed by a laser exposure device, developed, and then etched with a cupric chloride solution. To form cells by the engraving method, the cells are engraved on a plate-making roll by an electronic engraving machine (Heliorisch graph). 9) Chrome plating Copper plating is soft and does not have printing durability, so hard chrome plating is applied to impart printing durability. The plate-making roll is chucked by a cassette type roll chuck device and immersed in a chrome plating solution in a chrome plating tank for electrochromic plating. The diameter increase due to plating is about 12-14 μm. 10) Deburring When chrome plating in the pre-polishing step is performed, burrs are generated at the end of the cell. Therefore, the PVA polishing grindstone of the grindstone grinder is freely rotatable by turning off the rotary drive source, and the plate-making roll at the grindstone end face. While lightly pressing and applying a lubricating liquid to the pressed part, the PVA polishing grindstone is rotated together with the rotation of the plate making roll to generate a minute relative speed at the line contact part between the plate making roll and the PVA polishing grindstone. The PVA polishing grindstone is moved to perform minor mirror polishing.

FIG. 3 and FIG. 4 show a cylindrical polishing apparatus which is commonly used for the stencil plate polishing, the cylindrical polishing, and the mirror polishing in the process diagram shown in FIG. 3 and 4, the plate-making roll W
Both ends are chucked and rotated by a chuck cone 21a rotated by a motor (not shown) and a chuck cone 21b pivotally supported by a bracket of a linear motion device (not shown). Reference numeral 22 is an X table, which is movable in the X direction (parallel to the cylindrical surface of the plate-making roll W). Reference numerals 23a and 23b are XY tables, which are mounted on the X table 22 and are integrated with the X table 22 to form an X table.
It is movable in the Y direction (direction perpendicular to the cylindrical axis of the plate-making roll W) by the Y-direction moving devices 24a and 24b attached to the X table 22. Reference numerals 25a and 25b are movable brackets and are XY
Cylinder devices 26a, 26 provided on the table 22
It is supported by the pistons a, 26b and 26b and is movable in the Y direction. Reference numeral 27a indicates a polishing grindstone made of silicon carbide with a mesh number of 320, and the shaft 28a is XY.
A bearing 29a provided on the table 23a is pivotally supported and is rotated at a high speed by a motor 30a provided on the XY table 23.
Is a polishing grindstone made of silicon carbide with a grain size of 800,
The shaft 28b is pivotally supported by a bearing 29b provided on the XY table 23b and is rotated at a high speed by a motor 30b provided on the XY table 23b. The polishing grindstone 27a is a PVA grinding grindstone (not shown; commonly called a sponge grindstone, having a mesh size of 6000 after finishing the plate-pressing polishing.
It is made by adding A (polyvinyl alcohol) and phenol and sintering. ), Or the same PVA polishing grindstone with a turret type switching structure.
Reference numeral 31 is a blower for generating high-pressure air, which is mounted on the X table 22 and supplies high-pressure air to the cylinder device 26a,
Supply to 26a, 26b and 26b. The controller (not shown) is a cylinder device 26a, 26a, 26b, 26.
By inputting a signal from a pressure sensor (not shown) attached to b, the cylinder pressure can be freely adjusted so that the polishing pressure for pressing the polishing wheel 27 against the plate-making roll W matches the polishing data instructed to the controller. . Therefore, this cylindrical polishing apparatus is provided with the polishing grindstone 27a or 27b.
When the cylinder plate 26a, 26a or 26b, 26b is extended by rotating the plate-making roll W after approaching the plate-making roll W, the grinding wheel 27a or 27b is brought into close contact with the plate-making roll W and is polished at a constant pressure. Can, X
Cylindrical polishing can be performed by moving the table 22.

The stencil plate polishing and the cylinder polishing in this embodiment differ as follows. In the plate-down polishing, as shown in FIG. 3, first, the plate-making roll W is chucked at both ends and rotated, and the end face of the No. 320 silicon carbide polishing grindstone 27a which is rotationally driven by the plate-making roll W is pressed. Then, while moving with the lubricating liquid, it is moved in the movement order shown in FIGS. 5A and 5B, and is again polished in a short time so that the entire length has a uniform diameter. Next, a polishing whetstone 27a is used to perform reciprocal polishing from one end to the other end for several rolls so that the roll diameter is further reduced by 40 μm with respect to the plate-making roll W, and the plate is removed so as to eliminate cells. Next, the power of the motor 30a is turned off to freely rotate the polishing grindstone 27a, and the end surface of the freely rotating rotatable grindstone 27a is pressed against the rotating plate-making roll W with a pressure larger than that in normal polishing and the pressed portion. While rotating the plate-making roll W with the grinding liquid 27a while applying the lubricating liquid to the
By generating a minute relative velocity at the line contact portion between the plate-making roll W and the polishing grindstone 27a, and moving the polishing grindstone,
While removing the pitch stripes on the plate-making roll, the surface is finer than the surface roughness at the time of the normal cylindrical polishing. Then, as shown in FIG. 6, a velocity distribution proportional to the radius of gyration can be obtained in the polishing grindstone 27a, and as a result, as shown in FIG. When the polishing whetstone 27a is moved from one end to the other end while applying the lubricating liquid to the contact point between the plate-making roll W and the polishing whetstone 27a, the roughness of No. 500 to 600 is polished. The fine surface roughness obtained when switching to a grindstone and polishing is obtained. In the cylindrical polishing, as shown in FIG. 4, the plate-making roll W is chucked at both ends and rotated, and the end face of the No. 800 silicon carbide polishing grindstone 27b which is rotationally driven by the plate-making roll W is pressed to apply the lubricating liquid. Cylindrical polishing is carried out so as to eliminate the plating ground by reciprocating from one end to the other end while applying. Next, the power source of the motor 30b is turned off, and the grinding stone 27b
Is freely rotatable, and the end surface of the freely-rotatable polishing grindstone 27b is pressed against the rotating plate-making roll W with a pressure larger than that of normal polishing, and the plate-making roll W is ground while rotating while applying a lubricating liquid to the pressed portion. While rotating the grindstone 27b, a minute relative speed is generated at the line contact portion between the plate-making roll W and the polishing grindstone 27b, and the polishing grindstone is moved to remove the pitch stripes attached to the plate-making roll. The surface is polished to a finer surface roughness than the surface roughness during the usual cylindrical polishing. Then, as shown in FIG.
, A velocity distribution proportional to the radius of gyration can be obtained, and as a result, as shown in FIG. 7, a minute relative velocity with respect to the plate-making roll W is obtained at the line contact portion of the polishing grindstone 27b. Plate-making roll W and grinding wheel 27
When the polishing whetstone 27b is moved from one end to the other end while applying the lubricating liquid to the contact position of b, the roughness is 1500 to 1600.
The fine surface roughness obtained when polishing is performed by switching to the No. polishing wheel.

In the mirror polishing, first, the polishing grindstone 2 shown in FIG.
Explaining that 7a is automatically replaced with a No. 6000 PVA polishing grindstone, the No. 6000 PVA polishing grindstone 27a that is driven to rotate by the plate making roll W is pressed and a lubricating liquid is applied from one end to the other end. Perform one-way movement or one reciprocation to finish polishing before mirror finishing. Then, the plate-making roll W is rotated at a rotational speed two to three times higher than the rotational speed at the time of finish polishing to stop the drive of the motor 30a to freely rotate the PVA polishing grindstone 27a. By pressing with a double constant pressure, the PVA polishing grindstone 27a is rotated together with the rotation of the plate-making roll W to be mirror-polished. Then, as shown in FIG.
A velocity distribution proportional to the radius of gyration can be obtained in the polishing grindstone 27a, and as a result, as shown in FIG.
A minute relative speed with respect to the plate-making roll W is obtained at the line contact portion of the VA polishing grindstone 27a, and thus the PVA polishing grindstone is applied to the contact portion between the plate-making roll W and the PVA polishing grindstone 27a. The plate-making roll W is mirror-polished by moving 27a from one end to the other end. A minute relative rotation speed is obtained by pressing the No. 6000 PVA polishing grindstone strongly against the plate-making roll and rotating the plate-making roll together, and this minute relative rotation speed has no directivity with respect to the plate-making roll. By doing so, the polished copper powder does not crush the eyes of the PVA polishing grindstone, and mirror grinding of the plate-making roll is realized by the grindstone grinding. Mirror polishing can be sufficiently realized by using a polishing grindstone made of PVA No. 3000 or more. (It is not intended to limit the numerical value.) Even if the 6000 No. PVA polishing grindstone is driven to rotate and pressed against the plate-making roll that is rotationally driven, the mirror polishing cannot be realized at all. Since the plate-making roll can be mirror-polished by polishing with a grindstone, precise polishing can be performed in a shorter time than buffing. Since the mirror surface polishing of the plate-making roll can be performed by the grindstone polishing, automatic polishing can be realized without requiring skill, and automation can be realized.

Next, referring to FIGS. 5 (a) and 5 (b), a description will be given of the sequence of movement for plate-removing polishing so that the entire length of the plate-making roll has a uniform diameter. FIG. 5A shows the chuck cone 2.
1 shows a place where a plate-making roll W which is chucked at both ends by 1a and a chuck cone 21b and rotated is polished by a polishing grindstone 27a. Numerical values in the figure represent pre-polishing diameter values obtained by correcting the measured diameter value of each section for each constant pitch of the plate-making roll W obtained in the 2) Roll diameter measurement step shown in FIG. In FIG. 5A, the diameter is measured at a position 10 mm away from one end of the plate-making roll W, then the diameter is measured at a pitch of 30 mm, and the diameter is measured from the last measurement point to the other end of the plate-making roll W 1
Shows a location 0 mm apart. The diameter was measured up to the third decimal place and rounded off to the third decimal place. Polishing whetstone 2
Numeral 7a indicates that the polishing pressure is adjusted so that the one-time polishing dimension is 2.5 microns when it is in close contact with the plate-making roll W and moves in one direction while keeping the polishing pressure constant. Therefore, when the polishing grindstone 27a is polished back and forth once, the plate-making roll W is polished so that the diameter thereof is reduced by 10 microns. Therefore, the minimum value of the pre-polishing diameter value in each section is the second decimal place, and therefore the polishing size of one time of the polishing grindstone is 2.5 μm, which is four times the polishing size of the one time. The value has been corrected. FIG. 5B illustrates the movement of the polishing grindstone by showing the pre-polishing diameter value of each section of the plate-making roll in a bar graph of block stacking and showing the order of removing blocks by arrows and numbers. In the figure, the numerical value on the left is a diameter value, and one scale is 5 microns. Therefore, the height of one block is 5 microns. Since the polishing size of the polishing grindstone at one time is 2.5 μm, one block can be removed by reciprocating the polishing grindstone once. For ease of understanding, the following is a conceptual description of the final uniform diameter throughout the description of the block removal sequence. If the blocks are stacked, removing the block in the lower row lowers the block stacked on it. Actual polishing cannot be done from the inside first. However, it is possible to conceptually decide that the polishing of a certain section corresponds to the polishing of the lower block, rather than the polishing of the uppermost block, and it can be considered to polish the diameter small.
Then, the polishing grindstone 27a is brought into close contact with the plate-making roll W, and the polishing pressure is kept constant so that the size of one-time polishing becomes 2.5 microns, and the reference numerals 1 to 1 attached to the arrow in FIG. By repeating the reciprocating movement in the order shown in FIG. 18 to remove the block that has been reciprocally polished, the entire length of the plate making roll can be polished to a smaller uniform diameter that is one reciprocal polishing less than the minimum diameter value before polishing. it can. Figure 5
The order of the reciprocating movements shown in 1 to 18 in (b) follows the following rules. The block corresponding to the polishing margin portion larger than the minimum diameter value before polishing is reciprocated in the order of reference numerals 1, 2, 4, 6, 8, 10, 12, 14, 16 attached to the arrows in FIG. Remove in the order in which polishing is completed. Therefore, since the blocks are stacked in proportion to the pre-polishing diameter value, the blocks corresponding to the polishing allowance portion larger than the pre-polishing minimum diameter value of each section reciprocate the polishing movement by the number of the stacked blocks. You can remove everything when you do. Figure 5
For example, in order to remove the blocks of the same stage by performing the reciprocal polishing of (1) in (b), when the polishing allowance portion of each section exists continuously, reciprocal polishing of the continuous section is performed. Means Further, for example, when reciprocal polishing of reference numeral 2 in FIG. 5B is performed to reciprocally polish a continuous section so as to conceptually remove blocks at the same stage, the block of reciprocating section of 4 and the reciprocating section of 6 are removed. Parted with. Therefore, the grinding wheel grinds in the direction of the reference numeral 3 of the block of the reference numeral 3 and performs reciprocal polishing of the reference numeral 4 to remove the block of the reference numeral 4 of the arrow section. Polishing is performed in the direction of reference numeral 5 and reciprocal polishing of reference numeral 6 is performed to remove the block in the arrow section of reference numeral 6 so that the polishing pressure of the polishing grindstone is not zero and the polishing grindstone is not separated from the plate-making roll. That is, when the reciprocating polishing is performed at least once and the polishing margin portion still existing is separated, the section which has already been polished to the minimum diameter value before polishing is moved from one end of the plate-making roll to the other end. Further, when the reciprocating polishing with reference numeral 16 in FIG. 5B is performed, it means that the polishing is performed until there is no polishing allowance portion larger than the minimum diameter value before polishing. The section polished to the minimum diameter value is polished. Therefore, the entire length of the plate-making roll is intermittently polished so as to have a smaller uniform diameter obtained by polishing once in one direction than the minimum diameter value before polishing. Therefore, finally, as shown in FIG.
The backward polishing of reference numeral 18 in (b) is performed. by this,
It means that the entire length of the plate-making roll is polished so as to have a uniform diameter smaller than the minimum diameter value before polishing by one round trip.
Actual polishing cannot be done from the inside first,
When you move the grindstone polishing as described in the order to remove the above block, the diameter of the plate making roll becomes small, as if the lower block was removed, the upper block fell one step, and the order in which the blocks were removed It can be conceptually grasped to correspond to, and as a result, the minimum necessary movement of the grindstone polishing causes the entire length of the plate-making roll to be a small uniform diameter that is one reciprocal polishing less than the minimum diameter value before polishing. Can be precision polished. In addition,
It is not an essential requirement of the present invention to polish the reference numeral 18 in FIG. 5 (b). The reason is that the diameter becomes uniform when the polishing of reference numeral 17 is completed. Also, reference numeral 18
This is because, if the polishing of No. 17 is an essential requirement, it is conceivable that the plate-making roll is removed at the time when the polishing of No. 17 is finished and attached to another polishing apparatus to carry out No. 18 of polishing.

FIG. 8 is a diagram showing another moving order of the polishing grindstone. According to this moving order, the polishing start position and the polishing end position are in the middle of the plate-making roll. The relationship between the magnitude of the stroke and the polishing order is reversed between the reciprocal polishing with reference numerals 1 and 3 and the reciprocal polishing with reference numerals 13 and 19. As mentioned above,
The gravure plate-making method of the present invention does not include a step of mirror polishing with a buffing machine.

[0016]

According to the gravure plate-making method of the first invention of the present application, with respect to the stencil plate polishing and / or the cylindrical polishing, first the ordinary cylindrical polishing is performed on the plate-making roll, and then the polishing whetstone is driven by the rotary drive source. It can be turned off and freely rotated, and the grinding wheel is rotated along with the rotation of the plate making roll to generate a minute relative speed at the line contact point between the plate making roll and the grinding wheel to remove pitch stripes on the plate making roll. In addition, the surface roughness of ordinary cylindrical polishing is crushed so that the surface roughness is approximately doubled. Regarding plate-cut polishing,
With one type of grinding wheel, for example, No. 320, a polishing accuracy close to about twice can be obtained in a short time, and for cylindrical polishing, with one kind of polishing wheel, for example, No. 800, a polishing accuracy of about twice can be obtained in a short time. Therefore, the total plate making time can be shortened. Further, it is sufficient that each of the polishing stone for plate-pressing polishing and the polishing stone for cylindrical polishing is equipped with one type of polishing stone. Since the surface roughness can be finished in a state of being polished by a # 600 polishing grindstone, the next cylindrical polishing can be performed by a # 800 polishing grindstone, for example.
It is not necessary to change the grinding wheel that raises the number finely,
Since it is possible to greatly reduce the number of exchanges of the grinding wheel, it becomes easy to construct a system related to the grinding wheel polishing apparatus. For example, it is sufficient to replace the grindstone of a single head type grindstone polishing device once.
Also, if you adopt a two-head type grindstone polishing device,
If one head is equipped with a polishing grindstone for plate-pressing polishing and the other head is equipped with a polishing grindstone for cylindrical polishing, the heads used can be switched.

According to the gravure plate-making method of the second invention of the present application, for mirror-polishing, first, the PVA polishing grindstone is used to perform the final polishing before mirror-polishing on the plate-making roll by ordinary cylindrical polishing, and then the PVA-polishing. A structure in which the grindstone is rotated freely with the rotary drive source turned off, and the polishing grindstone is rotated together with the rotation of the plate making roll to generate a minute relative speed at the line contact point between the plate making roll and the grinding grindstone for mirror polishing. Is. In the mirror polishing, the polished copper powder does not crush the eyes of the polishing grindstone, and the grindstone polishing enables good mirror surface polishing of the plate-making roll. The plate-making roll can be mirror-polished by grinding with a grindstone instead of buffing.
Mirror surface polishing can be done with one type of PVA grinding wheel, so precise polishing can be done in a shorter time than buffing.
Dust measures, oil and fat removal, heat generation measures, long-time polishing, skill required, which were necessary for mirror polishing with buffs,
Almost all the problems such as system construction can be solved, and plate stencil polishing-plate depth forming plating-cylindrical polishing-mirror polishing-cell formation by etching or engraving-
It becomes possible to fully automate the gravure plate making process of producing a gravure plate making roll through a series of plate making processes.

According to the gravure plate-making method of the third invention of the present application, with respect to the plate-falling and the cylindrical polishing, first, the plate-making roll is subjected to normal cylindrical polishing, and then the polishing wheel is turned off to turn it free. By rotating the polishing grindstone along with the rotation of the plate making roll as freely rotatable, a minute relative speed is generated at the line contact point between the plate making roll and the polishing grindstone to remove pitch stripes attached to the plate making roll and This is a configuration in which the surface roughness of the cylindrical polishing is crushed and the surface roughness is approximately doubled. Regarding mirror polishing, P
With the VA polishing grindstone, first, the plate-making roll is subjected to the final polishing before the mirror-polishing by the ordinary cylindrical polishing, and then the PVA polishing grindstone is turned freely to turn the plate-making roll by rotating the rotary drive source. This is a configuration in which the polishing grindstone is rotated together and a minute relative speed is generated at the line contact portion between the plate-making roll and the polishing grindstone for mirror polishing. Therefore, the gravure plate making method of the third invention of the present application has both the effects of the invention of the gravure plate making method of the first invention of the present application and the effects of the invention of the gravure plate making method of the second invention of the present application.

[Brief description of drawings]

FIG. 1 shows a process drawing of a gravure plate making method of the present invention.

FIG. 2 is a schematic layout diagram of a plate making apparatus in a gravure plate making factory for carrying out the gravure plate making method of the present invention.

FIG. 3 is a schematic front view of a cylindrical polishing apparatus for carrying out the mirror-polishing method for a plate-making roll of the present invention, in which the entire length of the plate-making roll, which is a component of the mirror-polishing method for a plate-making roll, has a uniform diameter. Shows the state of polishing.

FIG. 4 is a schematic front view of a cylindrical polishing apparatus for carrying out the mirror-polishing method for a plate-making roll of the present invention, showing a state where the plate-making roll is mirror-polished.

FIG. 5 is a diagram for explaining a moving order for polishing the entire length of the plate-making roll to a uniform diameter, which is a component of the mirror-polishing method for the plate-making roll according to the first embodiment of the present invention. (A) shows a pre-polishing diameter value for each constant pitch of the plate making roll when the plate making roll is ground with a polishing grindstone. (B) is a figure for demonstrating movement of a grindstone by showing the diameter value before grinding of each section of a plate making roll by a bar graph of block accumulation, and showing the order which removes a block with an arrow and a number.

FIG. 6 is a diagram for explaining a mirror polishing method for a plate making roll of the present invention, showing a velocity distribution at a line contact portion when a polishing grindstone is brought into contact with the plate making roll.

FIG. 7 is a diagram for explaining a mirror polishing method for a plate making roll according to the present invention, in which the speed of the midpoint of the line contact point when the polishing grindstone is brought into contact with the plate making roll is the speed of the plate making roll. The figure which shows relative velocity distribution when it is considered that it is equal to.

FIG. 8 is a view for explaining the method of grinding a plate-making roll with a grindstone according to the second embodiment of the present invention, in which a pre-polishing diameter value of each section of the plate-making roll is shown in a block-stacked bar graph. And, it is a diagram for explaining the movement of the polishing grindstone by indicating the order of removing the blocks by arrows and numbers.

[Explanation of symbols]

W ・ ・ ・ Plate-making roll 27a, 27b ... Polishing grindstone

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Etsuji Yamagami             1201-11 Takada, Kashiwa City, Chiba Shin Co., Ltd.             Inside the laboratory F-term (reference) 2H084 AA40 BB02 BB16 CC03                 2H114 AA03 AA11 AA17 AA27 DA04                       EA01 EA02 EA06 GA03 GA29                 3C043 AA01 CC04 CC13

Claims (3)

[Claims] 1. A gravure plate-making roll is manufactured through a series of plate-making steps of plate-making polishing-plate depth forming plating-cylindrical polishing-mirror polishing-forming cells by an etching method or an engraving method-for a plate-making roll. In the gravure plate-making method, at least one of the plate-removing polishing and the cylindrical polishing is performed by chucking both ends of a plate-making roll by chuck cones provided at opposite ends of a pair of spindles of a grindstone polishing device to rotate the plate-making roll. The end surface of the grinding wheel that is driven to rotate is pressed and moved while applying a lubricating liquid to cylindrically grind the entire length, and then the grinding wheel is turned freely and can be freely rotated. While pressing and applying a lubricating liquid to the pressed part, rotate the grinding wheel along with the rotation of the plate making roll to generate a minute relative speed at the line contact part of the plate making roll and the grinding wheel. By moving the grindstone, a gravure plate making method characterized by, polished to a fine surface roughness than the surface roughness during the cylindrical polishing while removing pitch fringes attached to a plate-making roll. 2. A gravure plate-making roll is manufactured through a series of plate-making steps for plate-making rolls including plate-removing polishing-plate depth forming plating-cylindrical polishing-mirror polishing-forming cells by etching or engraving. In the gravure plate-making method, the mirror-polishing is performed by rotating the plate-making roll by chucking both ends of a plate-making roll with chuck cones provided at opposite ends of a pair of spindles of a grindstone polishing device, and rotating the plate-making roll by PVA-made polishing. After pressing the end face of the grindstone and moving it while applying the lubricating liquid to cylindrically grind the entire length, the PVA grinding grindstone is freely rotatable by turning off the rotary drive source, and presses and presses the plate-making roll with the grindstone end face. The PVA polishing grindstone is rotated together with the rotation of the plate making roll while applying the lubricating liquid to the place to generate a minute relative velocity at the line contact position between the plate making roll and the PVA polishing grindstone. Mirror polished by moving the PVA made grindstone, a gravure plate making method characterized by. 3. A gravure plate-making roll is produced through a series of plate-making steps of plate-making polishing, plate depth forming plating-cylindrical polishing-mirror polishing-forming cells by an etching method or an engraving method-for a plate-making roll. In the gravure plate-making method, the plate-removing polishing or the cylindrical polishing is performed by rotating the plate-making roll by chucking both ends of the plate-making roll with chuck cones provided at opposite ends of a pair of spindles of a grindstone polishing device. After pressing the end face of the grinding wheel and moving it while applying the lubricating liquid to cylindrically polish the entire length, the rotation source of the grinding wheel is turned off to be freely rotatable, and the plate-making roll is pressed by the end surface of the whetstone and While applying the lubricating liquid to the pressed area, the grinding wheel is rotated along with the rotation of the plate making roll, and a minute relative speed is generated at the line contact point between the plate making roller and the grinding wheel to move the grinding wheel. By doing so, while removing the pitch stripes attached to the plate-making roll, it is polished to a surface roughness finer than the surface roughness at the time of the cylindrical polishing, and the mirror polishing is provided at the opposite ends of a pair of spindles of a grindstone polishing device. The plate-making roll is chucked at both ends by the chuck cone and rotated, and the end face of the PVA polishing grindstone that is rotationally driven by the plate-making roll is pressed to move while applying a lubricating liquid to cylindrically polish the entire length, The polishing wheel is made free to rotate by turning off the rotation drive source, and the PVA polishing wheel is rotated along with the rotation of the plate making roller while pressing the plate making roller with the end surface of the wheel and applying the lubricating liquid to the pressed portion. A gravure plate-making method, characterized in that a minute relative speed is generated at a line contact portion between a plate-making roll and a PVA polishing grindstone, and the PVA polishing grindstone is moved to perform mirror polishing.