JP4408483B2 - Production method of gravure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of the present application is capable of grinding the grinding wheel with high precision, and even when performing calendar printing consisting of highlight to halftone images, the stripe pattern of the pitch pattern does not appear at all, or it appears to be very delicate, and high-definition printing It is related with the production method of gravure.
[0002]
[Prior art]
A new pre-made roll is a roll base material that is always subjected to ultra-high precision cylindrical processing with a lathe, nickel-plated and then copper-plated to about 100 μm. Even in the portion, the eccentric amount is suppressed to about 10 μm or less, and it has a highly accurate dynamic balance, and is finished to a highly uniform cylindrical accuracy from end to end of the roll.
[0003]
However, a plate is formed on a plate-making roll and used for printing. After that, the plate is dropped with a grindstone polishing device, copper-plated, cylindrically polished with a grindstone polishing device, buffed, finished to a mirror surface, and a plate is formed again. If the process is repeated many times, the roll circle is greatly decentered. The reason why the roll circle is greatly decentered is that the non-image area can be polished and the image area = the cell is space and cannot be polished, so the polishing area is different between places where there are many patterns and where shadow areas are highlighted. This is because the polishing resistance is different, and the portion where there are many symbols or the shadow portion is more easily polished than the portion where there are many symbols or where there are few symbols or the highlight portion. Rolls that have been greatly decentered in this way are subjected to ultra-high precision cylindrical machining with a lathe again to correct the decentering, copper-plated and reused.
[0004]
On the other hand, a new plate-making roll with extremely high dimensional accuracy as described above is balladed and then ballad-plated for about 60 to 80 μm, cylindrically polished by a grindstone polishing apparatus, buffed, and finished to a mirror surface. If it is formed and used for printing, and then the ballad plating is torn and removed, and the ballad treatment is performed again and the ballad plating is repeated and reused many times, as long as scratches and recesses do not occur on the plate making roll due to external force In addition, as long as there is no deformation due to heat, age-related distortion, etc., the pre-rolled roll can maintain the same cylindrical accuracy as when it is new, so the eccentricity is corrected by performing ultra-high precision cylindrical processing with a lathe. Impossible.
[0005]
Conventionally, when the plate-making roll on which the plate is formed is not a precise cylinder, specifically, when the middle diameter of the plate-making roll is, for example, 5 to 10 μm larger or smaller than the diameters at both ends, the plate-making roll Since a portion that does not strongly adhere to the roll and the impression cylinder is generated and printing is not performed well, the plate-making roll before forming the plate is required to have a highly uniform cylindrical accuracy from end to end.
[0006]
When cylindrical polishing of the plate-making roll is performed with a grindstone polishing device, the abrasive grains on the surface of the polishing grindstone gradually collapse, so that the cylinder accuracy is obtained by correcting the amount and performing cylindrical polishing. ing.
[0007]
On the other hand, when the plate-making roll with repeated printing is measured at a pitch of 10 mm, a difference of 10 μm to 10 μm is recognized in various modes. Regardless, the grinding wheel polishing device takes a large polishing allowance when the diameter is large, and a small polishing allowance when the diameter is small, and performs random correction polishing to make the roll a cylinder with a very high uniform diameter from end to end. There was a need. The reason for not using lathe machining is that the machining allowance is too large in lathe machining and correction is not possible even if random cylindrical machining is performed.
[0008]
Conventionally, the above-mentioned random correction polishing by a grindstone polishing apparatus measures the diameters of two to three locations at both ends and in the middle of the plate-making roll, and moves the grindstone by human work. When the diameter is small and the diameter is small, the roll is cylindrically polished so that the roll has a uniform diameter from end to end by reducing the number of times of polishing.
[0009]
In addition, the plate-making roll is required to have a cylindrical accuracy that is a uniform diameter with extremely high accuracy from end to end, which means that the pitch pattern during printing (like a screw thread despite the fact that the surface roughness is uniform). Since the high part and the low part are formed in a spiral shape, when high precision printing is performed, the stripes are about 3 to 5 mm wide and the long direction of the stripes appears as the roll surface length direction). It also means that it is required not to occur. In gravure printing, which requires high-precision printing, specifically, printing of banknotes, stamps, and stamps, if there are pitch marks on the plate-making roll before forming the plate, the printing is dark. The spots and thin spots clearly appear as long stripes in the roll circumferential direction. In particular, in calendar printing that prints a natural landscape from highlights to halftones on a film with slightly different shades of gradation, such as overlapping mountains, the effect of the pitch appears prominently in the print and there is a pattern of the pitch Calendar printing is not a product. Since the plate-making roll has pitch lines, the formation of the pitch pattern when high-precision printing is performed appears remarkably in the image area when the plate is formed by an electronic engraving machine (Helio-lithograph). This is because the distance between the engraving needle and the printing plate varies depending on the pitch. Therefore, even if there are pitch eyes, the pattern of the pitch eyes hardly appears when the plate is formed by the corrosion method. Furthermore, when the pitch is large, the pattern of the pattern of the stitch appears as a plate fog in the non-image area, regardless of whether the plate is formed by an electronic engraving machine or the plate is formed by a corrosion method. This plate fog appears more prominently in gravure printing using water-based ink.
[0010]
Conventionally, in the calendar printing that prints highlights and halftone natural scenery on the film with slightly different shades of gradation as described above, the plate making roll that has been cylindrically and mirror-polished with extremely high precision to the most reliable manufacturer 40 to 80 are prepared, and 10 to 20 identical plates are made for each color. If proof printing is performed, whether or not there are pitch eyes, whether there are many pixels with hollows, pinholes Comprehensively evaluate whether there is, etc., select the plate-making roll with the best printing results for each color, and perform calendar printing with the selected four plate-making rolls attached to a gravure rotary printing press At present, defective products are mostly discharged at the pitch, which may not be profitable. If the striped pattern of pitches does not appear in calendar printing, the striped pattern of pitches does not appear even in the printing of banknotes, stamps, stamps and the like.
[0011]
Accordingly, there is a need for a method for producing a gravure plate that can be subjected to cylindrical polishing and mirror polishing without generating pitch eyes. Conventional ultra-precision polishing of the gravure cylinder copper plating surface is performed as follows. For plate-making rolls that do not perform ballad plating, the plate is polished (rough finish) so that the diameter is reduced to about 60 μm by reciprocating as many times as necessary from end to end of the roll with a # 220 or # 320 grinding wheel. Cylinder polishing with a grindstone), and then, with a # 500 μm grindstone, the cylinder is polished by one reciprocation from end to end of the roll to finish rough finish cylindrical polishing. Next, copper plating is applied to a thickness of about 50 to 60 μm, and about 20 to 30 μm is used as a subsequent polishing allowance. Next, the diameter of the plate making roll is measured. This measurement is done for two or three diameters at both ends and in the middle. Next, after removing the plating surface by reciprocating twice from end to end of the roll with a # 800 or # 1000 polishing grindstone, the grindstone is manually moved based on the above measurement. If the diameter is small and the diameter is small, the number of times of polishing is reduced to cylindrically polish the roll so that it has a uniform diameter from end to end. Polishing, and then reciprocating twice from end to end of the roll with a # 2000 to # 2500 polishing grindstone. At this time, by finishing the feed rate of the grindstone one after another, the pitch finish is eliminated to finish the top finishing cylindrical polishing. . Next, three to five reciprocations are made from end to end of the roll with a # 3000 to # 4000 polishing stone, and at this time, the pitch is eliminated by successively changing the feeding speed of the grindstone to finish the precision finish cylindrical polishing. Finally, the mirror finish is finished by buffing. As for the above-described polishing stones, a polishing wheel made of silicon carbide was used.
[0012]
In addition, for a plate making roll of the type that performs ballad plating, after being subjected to printing, the ballad plating is cut and peeled off, and then copper plating is applied to a thickness of about 90 to 100 μm. 30 μm is set as a subsequent polishing allowance. Since the depth of the cell is 15 to 20 μm, it is not so if the plating is performed so that the ballad plating after polishing becomes about 30 μm so as to be a thinner film. When the ballad plating is about 30 μm, it becomes impossible to tear and peel off the ballad plating. Therefore, ballad plating is performed so that the thickness of the ballad plating after polishing is 60 μm to 80 μm. Next, the diameter of the plate making roll is measured. This measurement is done for two or three diameters at both ends and in the middle. Next, after removing the plating surface by reciprocating twice from end to end of the roll with a # 800 or # 1000 polishing grindstone, the grindstone is manually moved based on the above measurement. If the diameter is small and the diameter is small, the number of times of polishing is reduced to cylindrically polish the roll so that it has a uniform diameter from end to end. Polish and finish the intermediate finish cylindrical polishing. Subsequently, the polishing wheel of # 2000 to # 2500 is reciprocated twice from end to end of the roll. At this time, the finishing grinding is finished by eliminating the pitch by successively changing the feeding speed of the grindstone. Next, three to five reciprocations are made from end to end of the roll with a # 3000 to # 4000 polishing stone, and at this time, the pitch is eliminated by successively changing the feeding speed of the grindstone to finish the precision finish cylindrical polishing. Finally, the mirror finish is finished by buffing. As for the above-described polishing stones, a polishing wheel made of silicon carbide was used.
[0013]
In normal gravure printing, instead of calendar printing consisting of highlight-to-halftone images as described above, the top finishing cylindrical polishing by the # 2000- # 2500 polishing wheel is omitted and the # 3000- # 4000 polishing wheel The present situation is that the polishing operation is simplified, quick, and cost-reduced, for example, the number of reciprocations of precision finishing cylindrical polishing by two is completed.
[0014]
A polish master (trade name, manufactured by Detwiler, Germany) commercially available as an ultra-precision processing machine for a copper-plated surface of a gravure cylinder, chucks a plate-making roll at both ends and rotates it at a very low speed (1 to 10 r. p.m), rotating the diamond tool at a very high speed (3800 rpm), moving the diamond tool finish cutting at a very low speed (50 to 125 mm / min), and performing cylindrical cutting It is. According to this, the surface roughness is about 0.3 μm, which is sufficiently accurate, but the undulation (pitch) is about 1.5 μm. In this way, the cylindrical processed by the polish master has a large undulation, so there is no problem that a pitch eye pattern appears even if it is subjected to normal gravure printing, but from the above-mentioned highlight to halftone image In the calendar printing that becomes, the striped pattern of the pitch appears remarkably and it is not very product. Moreover, even if buffing is performed on a cylinder processed by a polish master, it cannot be erased. Therefore, there is no example in which calendar printing including highlight to halftone images is performed on a printing roll made on a plate-making roll that has been cylindrically processed by a polish master.
[0015]
On the other hand, conventionally, mirror polishing of a plate-making roll has been realized by finally performing buffing. When the plate-making roll is mirror-polished by buffing, there is a problem of eliminating dust and noise, and the time required for mirror-polishing is long and skill is required.
[0016]
Conventionally, mirror polishing with a grindstone was considered impossible. Conventionally, it is known that when a polishing grindstone is pressed against a plate-making roll so as not to rotate and the plate-making roll is rotated, a mirror surface is obtained. However, this is because the surface of the grinding wheel is filled immediately, so the surface of the plate-making roll is not polished, but the surface is rubbed with a grindstone and the surface is glossed. It was not obtained.
[0017]
[Problems to be solved by the invention]
The present invention has been devised in view of the above points, and by performing the minimum necessary polishing by grinding with a grindstone, a high-precision cylinder having a very small diameter deviation over the entire length of the plate-making roll can be obtained in a short time, Even if calendar printing consisting of highlight and halftone images is performed, the stripe pattern of the pitch does not appear at all, or it appears to be very delicate, and by producing only one, an extremely high quality printing roll can be obtained, Therefore, for the purpose of providing a method for producing a gravure plate that can be applied to the highest quality calendar printing and is suitable for the production of printing rolls that require high-definition printing such as stamps, revenue stamps, and gift certificates. Yes.
[0018]
[Means for Solving the Problems]
The first invention of the present application relates to a used printing roll. Resistance Remove the print film to expose the copper plating, and measure the diameter value from one end to the other end at regular intervals before or after the print-resistant film. Minimum and maximum deviation is 10μm or more Apply to rough finish grinding wheel Ru Corrective polishing to reduce the deviation of diameter, Rough finish whetstone Injury polishing And with rough finish grindstone Perform surface roughness miniaturized polishing in order, then copper plating, and then with a semi-finished grindstone Ru Plating skin removal polishing And by intermediate finish whetstone Perform surface roughness miniaturized polishing in order, and then use a finishing grindstone. Ru The surface roughness is miniaturized and then polished with a precision finish grindstone. Ru Cylindrical polishing And by precision finishing whetstone It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the rough finishing wheel, intermediate finishing wheel and top finishing wheel,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
Mirror polishing with the precision finishing grindstone described above is performed when the grindstone is disconnected from the drive source so that it can be freely rotated, and the rotation speed of the plate-making roll is made larger than that during precision finishing polishing, and the grinding stone is applied to the plate-making roll during precision finishing polishing. A method for producing a gravure plate, characterized in that the grinding stone is rotated in the surface length direction of the plate-making roll by rotating the plate-making roll along with the rotation of the plate-making roll by pressing with the polishing pressure of the plate-making roll. It is.
[0019]
The second invention of the present application is for a used printing roll. Resistance Remove the print film to expose the copper plating, and measure the diameter value from one end to the other end at regular intervals before or after the print-resistant film. The minimum and maximum deviation is less than 5μm Apply to rough finish grinding wheel Ru Injury polishing And with rough finish grindstone Perform surface roughness miniaturized polishing in order, then copper plating, and then with a semi-finished grindstone Ru Plating skin removal polishing And by intermediate finish whetstone Perform surface roughness miniaturized polishing in order, and then use a finishing grindstone. Ru The surface roughness is miniaturized and then polished with a precision finish grindstone. Ru Cylindrical polishing and With precision finishing wheel It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the rough finishing wheel, intermediate finishing wheel and top finishing wheel,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. Provided is a gravure plate manufacturing method characterized in that, by pressing with a polishing pressure at the time of polishing, a grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. To do.
[0020]
The third invention of the present application removes the printing film from the used printing roll to expose the copper plating, and before or after the printing film, the diameter is measured at a constant pitch from one end to the other. The diameter value Minimum and maximum deviation is 10μm or more Apply to rough finish grinding wheel Ru Corrective polishing to reduce the deviation of diameter, Rough finish whetstone Injury polishing And with rough finish grindstone Perform surface roughness miniaturized polishing in order, then copper plating, and then with a semi-finished grindstone Ru Plating skin removal polishing And by intermediate finish whetstone Perform surface roughness miniaturized polishing in order, then use a precision finish grindstone. Ru Cylindrical polishing And by precision finishing whetstone It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the rough finishing wheel and the intermediate finishing wheel,
The extension line of the rotation axis of the grinding wheel is not crossed with the rotation axis of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis of the plate-making roll viewed from the plane direction. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. Provided is a gravure plate manufacturing method characterized in that, by pressing with a polishing pressure at the time of polishing, a grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. To do.
[0021]
The fourth invention of the present application removes the printing film from the used printing roll to expose the copper plating, and measures the diameter at a constant pitch from one end to the other before or after the printing film. The diameter value The minimum and maximum deviation is less than 5μm Apply to rough finish grinding wheel Ru Stencil polishing and Rough finish whetstone Perform surface roughness miniaturized polishing in order, then copper plating, and then with a semi-finished grindstone Ru Plating skin removal polishing and With medium finish whetstone Perform surface roughness miniaturized polishing in order, then use a precision finish grindstone. Ru Cylindrical polishing And by precision finishing whetstone It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the rough finishing wheel and the intermediate finishing wheel,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. Provided is a gravure plate manufacturing method characterized in that, by pressing with a polishing pressure at the time of polishing, a grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. To do.
[0022]
The fifth invention of the present application removes the coating imparting the printing durability of the used printing roll, then cuts and removes the ballad copper plating to form a plate making roll in which the copper plating cylindrical surface is exposed, and the plate making Ballad copper plating is again laminated on the roll, and before or after the ballad copper plating, the diameter is measured at a constant pitch from one end to the other end of the plate making roll, Minimum and maximum deviation is 10μm or more Applicable to the case with a semi-finished grinding wheel Ru Corrective polishing to reduce the deviation in diameter and With medium finish whetstone Perform surface roughness miniaturized polishing in order, and then use a finishing grindstone. Ru Polish the surface roughness to a minimum and then use a precision finish grindstone. Ru Cylindrical polishing And by precision finishing whetstone It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the above-mentioned intermediate finishing grindstone and top finishing grindstone,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
Mirror polishing with the precision finishing grindstone described above is performed when the grindstone is disconnected from the drive source so that it can be freely rotated, and the rotation speed of the plate-making roll is made larger than that during precision finishing polishing, and the grinding stone is applied to the plate-making roll during precision finishing polishing. A method for producing a gravure plate, characterized in that the grinding stone is rotated in the surface length direction of the plate-making roll by rotating the plate-making roll along with the rotation of the plate-making roll by pressing with the polishing pressure of the plate-making roll. It is.
[0023]
The sixth invention of the present application removes the coating imparting the printing durability of the used printing roll, and then tears and removes the ballad copper plating to form a plate making roll in which the copper plating cylindrical surface is exposed, and the plate making Ballad copper plating is again laminated on the roll, and before or after the ballad copper plating, the diameter is measured at a constant pitch from one end to the other end of the plate making roll, The minimum and maximum deviation is less than 5μm Applicable to the case with a semi-finished grinding wheel Ru Plating skin removal polishing And by intermediate finish whetstone Perform surface roughness miniaturized polishing in order, and then use a finishing grindstone. Ru Polish the surface roughness to a minimum and then use a precision finish grindstone. Ru Cylindrical polishing And by precision finishing whetstone It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching, and polishing with the above-mentioned intermediate finishing grindstone and top finishing grindstone,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. Provided is a gravure plate manufacturing method characterized in that, by pressing with a polishing pressure at the time of polishing, a grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. To do.
[0024]
The seventh invention of the present application removes the coating imparting the printing durability of the used printing roll, and then tears and removes the ballad copper plating to form a plate making roll in which the copper plating cylindrical surface is exposed. Ballad copper plating is laminated again on the roll, and then the diameter is measured at a constant pitch from one end to the other end of the plate making roll. Minimum and maximum deviation is 10μm or more Applicable to the case with a semi-finished grinding wheel Ru Compensated polishing to reduce diameter deviation And by intermediate finish whetstone Perform surface roughness miniaturized polishing in order, then use a precision finish grinding wheel. Ru Cylindrical polishing And by precision finishing whetstone It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the intermediate finishing wheel
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. Provided is a gravure plate manufacturing method characterized in that, by pressing with a polishing pressure at the time of polishing, a grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. To do.
[0025]
The eighth invention of the present application removes the coating imparting the printing durability of the used printing roll, then cuts and removes the ballad copper plating to form a plate making roll in which the copper plating cylindrical surface is exposed, and the plate making Ballad copper plating is laminated again on the roll, and then the diameter is measured at a constant pitch from one end to the other end of the plate making roll. The minimum and maximum deviation is less than 5μm Applicable to the case with a semi-finished grinding wheel Ru Plating skin removal polishing And by intermediate finish whetstone Perform surface roughness miniaturized polishing in order, then use a precision finish grinding wheel. Ru Cylindrical polishing And by precision finishing whetstone It is a method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the intermediate finishing wheel
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. From a right angle to the rotation axis of the plate-making roll 0.5 degree Due to the inclined crossing state, the chord line parallel to the diameter line off the center hole of the end face of the grindstone Half In a state where it is in contact with the bus bar of the plate-making roll,
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. Provided is a gravure plate manufacturing method characterized in that, by pressing with a polishing pressure at the time of polishing, a grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. To do.
[ 0026 ]
In the ninth invention of the present application, in each of the first, third, fifth and seventh inventions, the correction polishing is a measured diameter value of each section measured at a constant pitch from one end of the plate-making roll to the other end. Before the polishing of each section, the polishing wheel is corrected to an approximate value that is four times the single polishing size when the polishing wheel is in close contact with the plate-making roll and moved in one direction while keeping the polishing pressure constant. The diameter is set to a small, uniform diameter by polishing the entire length of the plate-making roll one reciprocating than the minimum diameter value before polishing by holding the polishing wheel in close contact with the plate-making roll and keeping the polishing pressure constant and repeating the reciprocating movement. If the polishing allowance part larger than the minimum diameter value before polishing is polished by the number of reciprocations proportional to the diameter value before polishing, the polishing allowance part of each section is continuously present. The continuous section is polished back and forth, When the existing polishing allowance is left after performing the re-polishing at least once, the polishing allowance is moved to reach the polishing allowance so as not to overlap the already polished minimum diameter value before polishing. It is characterized by reciprocating polishing, polishing until there is no polishing allowance larger than the minimum diameter value before polishing, and moving the remaining section polished to the minimum diameter value before polishing to the other end of the plate making roll. A method for producing a gravure version is provided.
[ 0027 ]
DETAILED DESCRIPTION OF THE INVENTION
First, a cylindrical polishing apparatus for carrying out the gravure plate manufacturing method of the present invention will be briefly described with reference to FIGS.
This cylindrical polishing apparatus is a four-head type polishing apparatus. In FIG. 1, the chuck of the cylindrical body (plate making roll) W is supported after the cylindrical body W is horizontally supported by an industrial robot (not shown) and one chucked hole is fitted to the chuck cone 1 of the driving side chuck means. The chuck motor 2 is rotated by the number of rotations corresponding to the length of the cylindrical body W, and is locked so as not to rotate by a brake device (not shown), whereby the ball screw 3 and the ball nut 4 are screwed to each other on the counter drive side bracket. 5 is moved in the chuck direction, the chuck cone 6 of the counter drive side chuck means is fitted into the other chucked hole of the cylindrical body W, and the counter drive side spindle 7 compresses and slides the coil spring 8 by the chuck reaction force. Thus, the chuck is completed. Next, after the waterproof caps 10 and 10 are pressed against the end face of the cylindrical body W, the cylindrical body W chucked by the chuck cones 1 and 6 can be rotated by driving the motor 9.
The four polishing head devices 11, 12, 13, and 14 on both sides of the cylinder W to be chucked are chucked by an internal chuck mechanism (not shown) by inserting the shaft portion into the hollow polishing rotating shaft 11a, 12a, 13a, or 14a. A grinding wheel 11b, 12b, 13b, or 14b, and a grinding wheel rotating motor 11c, 12c, 13c, or 14c rotates the polishing rotary shaft 11a, 12a, 13a, or 14a.
The four polishing head devices 11, 12, 13, 14 are mounted on the corresponding Y tables 15, 16, 17, 18. Further, the Y tables 15 and 17 are placed on the X table 19, and the Y tables 16 and 18 are placed on the X table 20. The Y tables 15, 16, 17, and 18 are driven by the corresponding Y table motors 21, 22, 23, or 24, and the X tables 19 and 20 are driven by the corresponding X table motors 25 and 26, respectively. The Reference numeral 27 denotes an X table cover, reference numeral 28 denotes a Y table cover, and reference numeral 29 denotes a controller.
Accordingly, the four grinding wheels 11b, 12b, 13b, or 14b can be individually moved toward and away from the cylindrical body W by the Y table motor 21, 22, 23, or 24, and the X table motor 25 can be moved. Or 26 is movable in the surface length direction of the cylindrical body W.
[ 0028 ]
In FIG. 1, the polishing wheel 11b is a # 220 to # 500 silicon carbide rough finishing wheel, the polishing wheel 12b is a # 800 to # 1200 silicon carbide intermediate finishing wheel, and the polishing wheel 13b is # 2000 to # 3000. The fine finishing whetstone made of silicon carbide, the polishing whetstone 14b, is a precision finishing whetstone made of # 5000 to # 6000 PVA whetstone (a grindstone formed by adding PVA (polyvinyl alcohol) and phenol as an adhesive to silicon carbide and sintering). It is. In addition, it is preferable to use a PVA grindstone for the # 800 or more grindstone.
Since there is no standard such as JIS that specifically specifies the range with the wheel count, the distinction between rough finish, intermediate finish, top finish, and fine finish is conceptual and convenient in this specification. . There is a grade for the size of abrasive grains in the standard.
[ 0029 ]
As shown in FIGS. 2 (a) and 2 (b), polishing with the rough finishing grindstone 11b, the intermediate finishing grindstone 12b, and the top finishing grindstone 13b
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll.
In other words, the center hole of the grindstone is disengaged from the bus bar of the plate-making roll from the state in which the rotation axis of the grindstone is orthogonal to the rotation axis of the plate-making roll W and the diameter line of the end surface of the grindstone is in contact with the bus bar of the plate-making roll. Polishing is performed by bringing the length close to the diameter of the end face of the grindstone into contact with the bus bar of the plate-making roll in a state where it is shifted to the immediate front.
Also, as shown in FIGS. 2 (c) and 2 (d), polishing with the precision finishing grindstone 14b
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in an intersecting state inclined at a slight angle from the right angle with respect to the rotation axis of the plate-making roll, approximately half of the chord line parallel to the diameter line outside the central hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll. Do.
In other words, the rotational axis of the grindstone is tilted several degrees from the angle orthogonal to the rotational axis of the plate-making roll into the plane passing through the rotation axis of the plate-making roll, and the radius line of the end surface of the grinding wheel is brought into contact with the bus bar of the plate-making roll. From the state, the center hole of the grindstone is shifted to a position just before it deviates from the bus bar of the plate-making roll, and the one side portion having a length close to the radius of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll and polished. .
Note that the inclination angle α of the precision finishing grindstone 14b shown in FIG.
[ 0030 ]
Figure 4 These show the flowchart of the manufacturing method of the gravure plate of the first invention of the present application.
The gravure plate manufacturing method of the first invention of the present application is manufactured by the following first to thirteenth steps.
First step: Removal of chrome plating from used printing rolls
Second step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviation of the diameter value is, for example, 10 μm or more, the processes after the third step are performed.)
Third step: Correction polishing with rough finishing wheel 11b
Fourth step: Plate drop polishing with rough finishing whetstone 11b
Fifth step: Surface roughness miniaturized polishing with rough finishing wheel 11b
Sixth step: Nickel plating-copper plating
Seventh step: Plating skin removal polishing with intermediate finishing wheel 12b
Eighth step: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Ninth step: Surface roughness miniaturized polishing with the top finishing whetstone 13b
Tenth process: Cylindrical polishing with precision finishing wheel 14b
Eleventh process: mirror polishing with precision finishing wheel 14b
Twelfth process ... Gravure cell formation
Thirteenth process ... Chrome plating
The first step and the second step may be reversed.
The printing roll manufactured by the above first to thirteenth steps has a cylindrical mirror surface with no pitch eyes, and performs calendar printing consisting of highlight to halftone images that require the most precise printing. However, a gravure product with no pitch stripes can be obtained.
Therefore, since it is not based on workmanship, if one gravure plate is made for each color separated, the same gravure plate that has been selected as the best one among many in the past can be obtained, and the economic effect Is remarkable.
In addition to the four-head type polishing device, either two four-head type polishing devices or four single-head type polishing devices are installed, and a rough finishing wheel, intermediate finishing wheel, top finishing wheel, and precision finishing wheel are attached. 4 types of grindstones may be used, or a single head type grinder is provided, and the rough finish grindstone, intermediate finish grindstone, top finish grindstone, and precision finish grindstone are replaced according to the process. You may attach and grind | polish with four types of grindstones.
Hereinafter, each process is explained in full detail.
[ 0031 ]
The removal of the chrome plating in the first step is a process in which a used printing roll is immersed and dissolved in dilute sulfuric acid stored in a dechroming tank. The roll diameter measurement in the second step is performed by mounting the plate-making roll on a roll diameter measuring device and measuring the diameter with a precision of 5 μm, for example, every 10 mm pitch from one end to the other end of the plate-making roll. (Not shown).
[ 0032 ]
Based on the measurement result of the second step, the correction polishing of the third step is performed by randomly polishing a portion larger than the minimum value of the diameter value according to the diameter value as a polishing allowance, and at any part of the roll Finishing to a very high uniform diameter, and finally, one-way polishing or reciprocal polishing from one end of the roll to the other end.
A preferred embodiment of this correction polishing will be described in detail later with reference to FIG.
The falling plate polishing in the fourth step is reciprocal polishing from one end of the roll to the other end until there is no cell, and the polishing allowance is 40 to 50 μm in diameter, and correction polishing is performed in the third step. Since the uniform diameter is finished from one end of the roll to the other end, the falling plate polishing in the fourth step is finished to a uniform diameter from one end to the other end of the roll.
The surface roughness miniaturization polishing in the fifth step is polishing in which one or two reciprocations are polished from one end of the roll to the other end, the rotation speed of the grinding wheel is large, the rotation speed of the plate-making roll is small, and the movement of the grinding stone Since the speed is low, it is possible to remove the pitch eyes generated during the fourth step of the stencil polishing, and the surface roughness can be made smaller than that during the stencil polishing in the fourth step.
In the third and fourth steps, the grindstone 11b is rotated at a normal rotational speed, specifically 700 to 800 r. p. m, and the plate making roll is rotated at a normal rotational speed, specifically 100 to 150 r. p. m, the grindstone is moved at a normal moving speed, specifically 1200 mm / min. In the fifth step, the surface roughness miniaturization polishing is performed such that the grindstone 11b is, for example, 50 to 100 r. p. m The number of rotations is larger, and the number of rotations of the plate-making roll is 50 to 80 r. p. m The number of rotations and the grindstone are set to 600 mm / min, which is about half the normal moving speed, for example.
[ 0033 ]
In the sixth step, plating is performed by a thickness that reduces the diameter by polishing. Specifically, for example, nickel plating is performed so as to be larger by 20 μm than the maximum diameter value of the measurement result of the second step, and then copper plating is performed so as to be larger by 30 μm. Plating is performed so that the diameter value after the surface roughness miniaturization polishing in the fifth step becomes larger by about 60 to 70 μm.
Nickel plating takes into account that the iron of the roll base material is exposed at the end of the polishing in the fifth step, and even if copper plating is directly applied to iron, the plating does not adhere firmly, so nickel that adheres firmly This is because the copper plating is firmly attached by plating. When the roll base iron is not exposed at the end of the polishing in the fifth step, nickel plating is unnecessary, but when performing fully automatic plate making, it is unclear whether the roll base iron is exposed. Since there is, nickel plating is performed uniformly.
When the roll base material is aluminum and the aluminum is exposed, it is necessary to remove the plate making line and perform the base coating before performing copper plating. Therefore, in order to prevent this case from occurring, the roll base material is never exposed even if the copper plate is thickly plated and the plate is polished.
[ 0034 ]
In the seventh process, the plating skin removal polishing is a polishing that only removes the plating skin by one-way polishing or reciprocating polishing from one end of the roll to the other end with the intermediate finish grindstone 12b. When it cannot be removed, more polishing may be performed. The rotational speed of the grindstone, the rotational speed of the plate-making roll, and the moving speed of the grindstone are set to substantially the same values as those in the third process.
The surface roughness miniaturization polishing in the eighth step can remove the pitch eyes generated during the stencil polishing in the seventh step in the same way as the fifth step by the intermediate finish grindstone 12b, and further reduce the surface roughness. It can be made smaller than in the case of the falling plate polishing in the seventh step. The rotational speed of the grindstone, the rotational speed of the plate-making roll, and the moving speed of the grindstone are set to substantially the same values as in the fifth process polishing.
[ 0035 ]
The surface roughness miniaturization polishing in the ninth step remains extremely small even if the surface roughness miniaturization polishing in the eighth step is performed by one-way polishing from one end of the roll to the other end with the top finishing grindstone 13b. The pitch can be completely removed, and the surface roughness can be further reduced to a level corresponding to the surface roughness when grinding with a grinding wheel having a numerical value of about 1.5 times under normal conditions. The number of rotations, the number of rotations of the plate-making roll, and the moving speed of the grindstone are set to substantially the same values as in the fifth process.
Preferably, the transfer speed of the grindstone is slightly changed. On the other hand, if the surface roughness is reduced after performing cylindrical polishing with the top finishing grindstone 13b, a new pitch is created by the cylindrical polishing, and the surface roughness due to the subsequent finishing grindstone 13b is very small. Compared to the case where the surface roughness miniaturization polishing by the finishing grindstone 13b is performed after the surface roughness miniaturization polishing in the eighth step, the pitch polishing (gap between the large and small undulation diameter values) is performed. Does not get smaller.
[ 0036 ]
As shown in FIGS. 2 (c) and 2 (d), the cylindrical polishing with the precision finishing grindstone in the tenth step and the mirror polishing with the precision finishing grindstone in the eleventh step are covered by the extension line of the rotating shaft of the grindstone 14 b. The extension line of the rotation axis of the grinding wheel is not perpendicular to the rotation axis of the plate-making roll, so that it does not cross the rotation axis of the plate-making roll and the rotation axis of the grinding wheel and the rotation axis of the plate-making roll are viewed from the plane. By being in a crossing state inclined by a minute angle, the half-string string parallel to the diameter line out of the center hole on the end face of the grindstone is brought into contact with the bus bar of the plate-making roll.
In cylindrical polishing with a precision finishing grindstone in the tenth step, the rotational speed of the grindstone, the rotational speed of the plate-making roll, and the moving speed of the grindstone are set to substantially the same values as in the third process.
In the eleventh step, mirror polishing with a precision finishing grindstone is performed by releasing the connection between the grinding wheel 14b and the drive source so that the grindstone can be freely rotated, and the number of rotations of the plate-making roll is larger than that during the precision finishing polishing, so that the grindstone is made into a plate-making roll. By pressing with the polishing pressure at the time of precision finish polishing, the grinding wheel is rotated with the rotation of the plate-making roll, and the grinding stone is moved in the surface length direction of the plate-making roll.
[ 0037 ]
The gravure cell in the twelfth step may be formed by either an engraving method using an electronic engraving machine or an etching method for forming a resist image.
The chrome plating in the thirteenth step is performed for imparting printing durability because there is no printing durability on the copper plate surface, and plating is performed so as to have a plating thickness of 5 to 7 μm.
[ 0038 ]
Next, figure 3 The moving order of the grindstone 11b (or 12b) for correcting and polishing so as to obtain a high-precision cylinder having a very small diameter deviation over the entire length of the plate-making roll will be described with reference to (a) and (b).
Figure 3 (A) shows a place where the plate-making roll W chucked and rotated by the chuck cone 21a and the chuck cone 21b is polished by the polishing grindstone 11b, and the numerical values in the figure are for each constant pitch of the plate-making roll W. Shows the diameter value before polishing corrected for the measured diameter value in each section.
Figure 3 (A) measures the diameter at a position 10 mm away from one end of the plate-making roll W, then measures the diameter at a pitch of 30 mm, and places 10 mm away from the last measurement location to the other end of the plate-making roll W Show. The diameter was measured to the third decimal place and rounded to the third decimal place.
The polishing grindstone 11b can perform polishing by adjusting the polishing pressure so that the polishing size per one time becomes 2.5 microns when moving in one direction while keeping the polishing pressure constant while being in close contact with the plate making roll W. Thus, when the polishing grindstone 11b is polished once and again, the plate making roll W is polished so that the diameter becomes 10 microns smaller.
Accordingly, since the minimum value of the diameter value before polishing in each section is the second decimal place, the polishing size of the polishing wheel is 2.5 microns, so that the polishing size is four times the polishing size. The value has been corrected.
Figure 3 (B) illustrates the movement of the grinding wheel by indicating the diameter value before polishing of each section of the plate-making roll as a bar graph of block stacking and indicating the order of removing the blocks with arrows and numbers. In the figure, the numerical value on the left is the diameter value, and one scale is 5 microns. Therefore, the height of one block is 5 microns. Since one polishing size of the polishing wheel is 2.5 microns, one block can be removed by reciprocating the polishing wheel once.
Hereinafter, it will be conceptually explained that the diameter finally becomes uniform through the description of the order of removing the blocks.
If the blocks are stacked, removing the lower block lowers the block stacked on it. Actual polishing cannot be performed from the inside first. However, it can be considered that the polishing of a certain section is conceptually determined to correspond to the polishing of the lower block, not the polishing of the uppermost block, and the diameter is reduced.
Then, the polishing wheel 11b is brought into close contact with the plate-making roll W, and the polishing pressure is kept constant so that the polishing size at one time becomes 2.5 microns. 3 (B) By polishing while repeating reciprocating movement in the order indicated by reference numerals 1 to 18 attached to the arrows in FIG. 18B, when the block subjected to one reciprocating polishing is removed, the total length of the plate-making roll is determined from the minimum diameter value before polishing. Can also be polished to a small uniform diameter by one round of polishing.
Figure 3 The order of the reciprocating movement shown in 1 to 18 in (b) follows the following rules. The block corresponding to the polishing allowance larger than the minimum diameter before polishing is shown in the figure. 3 (B) Removed in the order of reciprocal polishing in the order of reference numerals 1, 2, 4, 6, 8, 10, 12, 14, 16 attached to the arrows in (b).
Accordingly, since the blocks are stacked in proportion to the diameter value before polishing, the blocks corresponding to the polishing allowance larger than the minimum diameter value before polishing in each section reciprocate the polishing movement by the number of stacked blocks. You can remove it all.
Figure 3 For example, removing the block of the same step by performing the reciprocal polishing of, for example, reference numeral 1 in (b) means that when there is a continuous polishing allowance in each section, the continuous section is reciprocally polished. Means.
Also figure 3 For example, when reciprocal polishing is performed in a continuous section so as to remove a block of the same step conceptually by performing reciprocal polishing of reference numeral 2 in (b), a block of reciprocating section of reference numeral 4 and a block of reciprocating section of reference numeral 6 break up. Therefore, the grinding wheel is polished in the direction of reference numeral 3 of the block of the arrow section indicated by reference numeral 3 to perform reciprocal polishing of reference numeral 4 to remove the block of the arrow section of reference numeral 4, and then By polishing in the direction of reference numeral 5 and performing reciprocal polishing of reference numeral 6 to remove the block in the arrow section indicated by reference numeral 6, the polishing pressure of the polishing wheel is not reduced to zero and the polishing wheel is not separated from the plate-making roll.
That is, when reciprocal polishing is performed at least once and the existing polishing margin part is separated, the section that has already been polished to the minimum diameter value before polishing is polished and moved from one end of the plate-making roll to the other end.
In addition, the figure 3 When the reciprocal polishing of reference numeral 16 in (b) is performed, the polishing is performed until there is no polishing allowance larger than the minimum diameter value before polishing. Therefore, the minimum diameter value before polishing is already set in the direction of reference numeral 17. Polish the polished section.
Thus, the entire length of the plate making roll is intermittently polished so as to have a smaller uniform diameter that is polished once in one direction than the minimum diameter value before polishing.
So, finally, from the other end of the plate making roll toward one end, 3 (B) The backward polishing of reference numeral 18 in FIG. As a result, the entire length of the plate-making roll is polished so as to have a uniform diameter smaller than the minimum diameter before polishing by one reciprocal polishing.
Although it is impossible to perform actual polishing first from the inside, if the grinding wheel polishing is moved as described in the order of removing the above blocks, the diameter of the plate-making roll is reduced, as if By removing the lower block, it is possible to grasp conceptually so that the upper block falls one step and corresponds to the order in which the blocks are removed. Precision polishing can be performed so that the entire length is smaller than the minimum diameter before polishing by one reciprocal polishing.
Figure 3 It is not an essential requirement of the present invention to polish the reference numeral 18 in (b). The reason is that the uniform diameter is obtained when the polishing of reference numeral 17 is finished. Further, if it is an essential requirement to perform the polishing of reference numeral 18, it is considered that when the polishing of reference numeral 17 is finished, the plate-making roll is removed and attached to another polishing apparatus to perform polishing of reference numeral 18. .
[ 0039 ]
Figure 5 These show the flowchart of the manufacturing method of the gravure plate of 2nd invention of this application.
The gravure plate manufacturing method of the second invention of the present application is manufactured by the following first to twelfth steps.
First step: Removal of chrome plating from used printing rolls
Second step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviations of the diameter value are, for example, 5 μm or less, the third and subsequent processes are performed.)
Third step: Plate drop polishing using the rough finishing whetstone 11b
Fourth step: Surface roughness miniaturized polishing with rough finishing wheel 11b
Fifth step: Nickel plating-copper plating
Sixth step: Plating skin removal polishing with intermediate finishing wheel 12b
Seventh process: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Eighth step: Surface roughness miniaturized polishing with the finishing grindstone 13b
Ninth process: Cylindrical polishing with precision grinding wheel 14b
Tenth process: Mirror polishing with precision finishing wheel 14b
Eleventh process-formation of gravure cell
Twelfth process ... Chrome plating
The first step and the second step may be reversed.
The printing roll manufactured by the method of manufacturing the gravure plate of the second invention of the present application is also the same as the first invention of the present application. A gravure product that does not show pitch stripes even when calendar printing of halftone images is performed can be obtained.
In the method for producing a gravure plate according to the second invention of the present application, [the third step: correction polishing by the rough finishing grindstone 11b] of the method for producing the gravure plate of the first invention of the present application is omitted. This is because, as described above, since the minimum and maximum deviations in the diameter value are small as a result of the measurement in the third step, the correction polishing can be omitted.
[ 0040 ]
Figure 6 These show the flowchart of the manufacturing method of the gravure plate of the third invention of the present application.
The gravure plate manufacturing method of the first invention of the present application is manufactured by the following first to twelfth steps.
First step: Removal of chrome plating from used printing rolls
Second step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviation of the diameter value is, for example, 10 μm or more, the processes after the third step are performed.)
Third step: Correction polishing with rough finishing wheel 11b
Fourth step: Plate drop polishing with rough finishing whetstone 11b
Fifth step: Surface roughness miniaturized polishing with rough finishing wheel 11b
Sixth step: Nickel plating-copper plating
Seventh step: Plating skin removal polishing with intermediate finishing wheel 12b
Eighth step: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Ninth process: Cylindrical polishing with precision grinding wheel 14b
Tenth process: Mirror polishing with precision finishing wheel 14b
Eleventh process-formation of gravure cell
Twelfth process ... Chrome plating
The first step and the second step may be reversed.
In the method for producing a gravure plate of the third invention of the present application, the [9th step: surface roughness miniaturization polishing by the finishing grindstone 13b] of the method of producing the gravure plate of the first invention of the present application is omitted. . Even if the surface roughness miniaturization polishing by the top finishing grindstone 13b is omitted, the striped pattern of the pitch is very small and sufficiently satisfies the conventional cylindrical accuracy capable of performing precise printing. Therefore, it is a technique useful for producing a printing roll capable of high-definition printing unless it is calendar printing consisting of highlight to halftone images, which requires the most precise printing.
[ 0041 ]
Figure 7 These show the flowchart of the manufacturing method of the gravure plate of the 4th invention of this application.
The gravure plate manufacturing method of the first invention of the present application is manufactured by the following first to eleventh steps.
First step: Removal of chrome plating from used printing rolls
Second step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviations of the diameter value are, for example, 5 μm or less, the third and subsequent processes are performed.)
Third step: Plate drop polishing using the rough finishing whetstone 11b
Fourth step: Surface roughness miniaturized polishing with rough finishing wheel 11b
Fifth step: Nickel plating-copper plating
Sixth step: Plating skin removal polishing with intermediate finishing wheel 12b
Seventh process: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Eighth process: Cylindrical polishing with precision finishing wheel 14b
Ninth step: Mirror polishing with precision finishing wheel 14b
Tenth process: Gravure cell formation
Eleventh process ... Chrome plating
The first step and the second step may be reversed.
The gravure plate manufacturing method of the fourth invention of the present application is the same as the method of manufacturing the gravure plate of the first invention of the present application [third step: correction polishing with rough finishing grindstone 11b, and ninth step ... The surface roughness miniaturization polishing by the finishing grindstone 13b] is omitted. This is because, as described above, since the minimum and maximum deviations in the diameter value are small as a result of the measurement in the third step, the correction polishing can be omitted. Further, even when the surface roughness miniaturization polishing by the top finishing grindstone 13b is omitted, the stripe pattern of the pitch appears very little, and the conventional cylindrical accuracy that can generally perform precise printing is sufficiently satisfied. This is because it is a useful technique for producing a printing roll capable of high-definition printing unless it is calendar printing consisting of highlight to halftone images, which requires the most precise printing.
[ 0042 ]
Figure 8 These show the flowchart of the manufacturing method of the gravure plate of the fifth invention of the present application. The gravure plate manufacturing method of the fifth invention of the present application is manufactured by the following first to eleventh steps.
First step: Removal of chrome plating from used printing rolls
Second step: stripping ballad copper plating
Third step: Again, ballad copper plating
Fourth step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviations of the diameter value are, for example, 10 μm or more, the processing after the fifth step is performed.)
Fifth step: Corrective polishing with the intermediate finishing wheel 11b
Sixth step: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Seventh step: Surface roughness miniaturized polishing with the finishing grindstone 13b
Eighth process: Cylindrical polishing with precision finishing wheel 14b
Ninth step: Mirror polishing with precision finishing wheel 14b
Tenth process: Gravure cell formation
Eleventh process ... Chrome plating
The third step and the fourth step may be reversed.
Since the printing roll manufactured by the above first to eleventh steps has a quality equivalent to that of the printing roll manufactured by the first invention of the present application, and a cylindrical mirror surface having no pitch eyes is obtained, A gravure product that does not show pitch stripes even when performing calendar printing consisting of highlight to halftone images, which requires the most precise printing, is obtained.
[ 0043 ]
Figure 9 These show the flowchart of the manufacturing method of the gravure plate of the fifth invention of the present application.
The gravure plate manufacturing method of the sixth invention of the present application is manufactured by the following first to tenth steps.
First step: Removal of chrome plating from used printing rolls
Second step: stripping ballad copper plating
Third step: Again, ballad copper plating
Fourth step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviations of the diameter value are 5 μm or less, for example, the processes after the fifth step are performed.)
Fifth step: Plating skin removal polishing with intermediate finishing wheel 11b
Sixth step: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Seventh step: Surface roughness miniaturized polishing with the finishing grindstone 13b
Eighth process: Cylindrical polishing with precision finishing wheel 14b
Ninth step: Mirror polishing with precision finishing wheel 14b
Tenth process-Gravure cell formation
Eleventh process ... Chrome plating
The third step and the fourth step may be reversed.
The printing roll manufactured by the above first to tenth steps can obtain the same quality as the printing roll manufactured by the second invention of the present application, and can obtain a cylindrical mirror surface having no pitch eyes. A gravure product that does not show stripes at the pitch even when performing calendar printing consisting of highlight to halftone images, which requires precise printing, is obtained.
[ 0044 ]
Figure 10 These show the flowchart of the manufacturing method of the gravure plate of the seventh invention of the present application.
The gravure plate manufacturing method of the seventh invention of the present application is manufactured by the following first to tenth steps.
First step: Removal of chrome plating from used printing rolls
Second step: stripping ballad copper plating
Third step: Again, ballad copper plating
Fourth step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviations of the diameter value are, for example, 10 μm or more, the processing after the fifth step is performed.)
Fifth step: Corrective polishing with the intermediate finishing wheel 11b
Sixth step: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Seventh process: Cylindrical polishing with precision finishing wheel 14b
Eighth step: Mirror polishing with precision finishing wheel 14b
Ninth step: Gravure cell formation
Tenth process: Chrome plating
The third step and the fourth step may be reversed.
The printing roll manufactured by the above first to tenth steps can obtain the same quality as the printing roll manufactured by the third invention of the present application.
In the method for producing a gravure plate of the seventh invention of the present application, the [seventh step... Surface roughness miniaturized polishing by the finishing grindstone 13b] of the method of producing the gravure plate of the fifth invention of the present application is omitted. . Even if the surface roughness miniaturization polishing by the top finishing grindstone 13b is omitted, the striped pattern of the pitch is very small and sufficiently satisfies the conventional cylindrical accuracy capable of performing precise printing. Therefore, it is a technique useful for producing a printing roll capable of high-definition printing unless it is calendar printing consisting of highlight to halftone images, which requires the most precise printing.
[ 0045 ]
Figure 11 These show the flowchart of the manufacturing method of the gravure plate of the 8th invention of this application.
The manufacturing method of the gravure plate of the eighth invention of the present application is manufactured by the following first to tenth steps.
First step: Removal of chrome plating from used printing rolls
Second step: stripping ballad copper plating
Third step: Again, ballad copper plating
Fourth step: Diameter measurement at constant pitch from one end to the other end of the plate making roll
(As a result of the above measurement, when the minimum and maximum deviations of the diameter value are 5 μm or less, for example, the processes after the fifth step are performed.)
Fifth step: Plating skin removal polishing with intermediate finishing wheel 11b
Sixth step: Surface roughness miniaturized polishing with intermediate finishing wheel 12b
Seventh process: Cylindrical polishing with precision finishing wheel 14b
Eighth step: Mirror polishing with precision finishing wheel 14b
Ninth step: Gravure cell formation
Tenth process: Chrome plating
The third step and the fourth step may be reversed.
The printing roll manufactured by the first to tenth steps can obtain the same quality as the printing roll manufactured by the fourth invention of the present application.
The method for producing a gravure plate of the eighth invention of the present application replaces the [fifth step ... corrected polishing by the intermediate finishing stone 11b] in the method of production of the gravure plate of the fifth invention of the present application [fifth Step: Plating skin removal polishing with the intermediate finishing grindstone 11b] is performed. Further, the [seventh step... Surface roughness miniaturization polishing by the finishing grindstone 13b] in the method for producing a gravure plate of the fifth invention of the present application is omitted.
This is because, as described above, since the minimum and maximum deviations in the diameter value are small as a result of the measurement in the fourth step, the correction polishing can be omitted. Further, even when the surface roughness miniaturization polishing by the top finishing grindstone 13b is omitted, the stripe pattern of the pitch appears very little, and the conventional cylindrical accuracy that can generally perform precise printing is sufficiently satisfied. This is because it is a useful technique for producing a printing roll capable of high-definition printing unless it is calendar printing consisting of highlight to halftone images, which requires the most precise printing.
[ 0046 ]
【The invention's effect】
As described above, according to the method for producing a gravure plate of the first, second, fifth and sixth inventions of the present application,
A cylindrical mirror surface with no pitch eyes is obtained, and a gravure product that requires the most precise printing and does not show pitch stripes even when calendar printing consisting of highlight to halftone images is obtained.
In addition, according to the method for producing a gravure plate of the third, fourth, seventh, and eighth inventions of the present application,
The striped pattern of the pitch appears very little, and it can sufficiently satisfy the conventional cylindrical precision that can be printed with high precision. Therefore, the image from highlight to halftone that requires the most accurate printing is required. If it is not the calendar printing which consists of, it is a technique useful for manufacture of the printing roll which can perform high-definition printing.
According to the method for producing a gravure plate of the first to eighth inventions of the present application,
In addition to being applicable to the highest quality calendar printing, it is suitable for the production of printing rolls that require high-definition printing such as stamps, revenue stamps, and gift certificates.
According to the gravure plate manufacturing method of the first to tenth inventions of the present application,
Because it is not based on workmanship, if one gravure plate is made for each color separated, the same gravure plate as the best one selected from the many in the past can be obtained, and the economic effect is remarkable. It is.
According to the gravure plate manufacturing method of the first to tenth inventions of the present application,
The mirror-polished powder does not crush the eyes of the grinding wheel, and the plate roll can be mirror-polished by grinding the grinding wheel.
Therefore, for example, after polishing with a No. 800 grindstone, for example, polishing with No. 3000 to No. 6000 PVA grindstone, and then mirror polishing can be performed with the PVA grindstone. In the present invention, for example, a PVA grindstone of No. 3000 to No. 6000 is strongly pressed against the plate making roll to rotate it and obtain a minute relative rotation speed, and this minute relative rotation speed is directional with respect to the plate making roll. There is no fine polishing effect Imposing Can be mirror polished , On the other hand, mirror polishing cannot be realized even if the PVA grindstone of No. 3000 to No. 6000 is driven and rotated against the plate-making roll that is driven to rotate.
According to the gravure plate manufacturing method of the first to tenth inventions of the present application,
Since the plate-making roll can be mirror-polished by grinding with a grindstone, it can be precisely polished in a shorter time than buffing, and a high-quality printing roll can be easily produced and provided.
According to the method for producing a gravure plate of the first to eighth inventions of the present application,
Since the plate-making roll can be mirror-polished by grinding with a grindstone, automatic polishing can be performed without requiring skill, and a high-quality printing roll can be easily produced and provided.
According to the gravure plate manufacturing method of the first to tenth inventions of the present application,
Buffing has the drawback that noise and dust are generated and it takes a long time to polish, but such a drawback can be solved.
According to the gravure plate manufacturing method of the eleventh invention of the present application,
Even if the cylinder accuracy of the plate-making roll before cylindrical polishing is low, the plate-making roll can be precisely polished to a uniform diameter over the entire length with a short light polishing process, making it easy to produce high-quality printing rolls. Can be provided.
According to the gravure plate manufacturing method of the eleventh invention of the present application,
Since the number of polishings is proportional to the size of the diameter and the pressure is kept constant, the polishing roll is uniformly distributed over the entire length even if the linear motion accuracy of moving the polishing wheel of the polishing apparatus along the plate making roll is low. A polishing apparatus that can polish to a diameter and has low cylindrical polishing accuracy can be improved from the soft surface so that the cylindrical polishing accuracy is extremely high, and a high-quality printing roll can be easily produced and provided.
According to the gravure plate manufacturing method of the eleventh invention of the present application,
Since the polishing is performed while keeping the pressure constant, it is not necessary to make correction for the amount that the surface of the polishing wheel gradually collapses, and the polishing can be performed to a uniform diameter over the entire length.
According to the gravure plate manufacturing method of the eleventh invention of the present application,
Compared with the conventional plate making roll polishing method, which repeats polishing and removing the entire length of the plate making roll, measuring it, detecting a large diameter, chucking it again with the polishing machine, and polishing it many times. Precise and high-quality printing rolls can be easily manufactured and provided.
According to the gravure plate manufacturing method of the eleventh invention of the present application,
Compared with the conventional plate-making roll polishing method, which detects the minute dimension of the grinding wheel reduced during polishing and corrects it as needed, a high-precision and high-quality printing roll can be easily produced and provided.
According to the gravure plate manufacturing method of the eleventh invention of the present application,
It is possible to polish the plate making roll to a uniform diameter over the entire length only by reciprocating the reciprocating polishing without performing continuous cylindrical polishing from one end to the other end of the plate making roll. Cylindrical polishing that continues to the other end is sufficient. There is no possibility that the diameter of the plate making roll will be too small. Therefore, the thickness of the ballad plating of the plate making roll can be made smaller than before, which is economical.
According to the gravure plate manufacturing method of the eleventh invention of the present application,
The measurement operation of the cylinder accuracy is only required once before the cylinder polishing, and it is not necessary to measure the cylinder accuracy by removing the plate-making roll and placing it on the measuring instrument after the cylinder polishing.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a cylindrical polishing apparatus for carrying out a gravure plate manufacturing method of the present invention.
2 is a view for explaining a polishing posture of a grindstone with respect to a plate-making roll of the cylindrical polishing apparatus of FIG. 1; FIG. (A) And (b) is a front view and a top view of the polishing posture with respect to the plate-making roll by the rough finishing grindstone 11b, the intermediate finishing grindstone 12b, and the top finishing grindstone 13b. (C) and (d) are a front view and a plan view of the polishing posture of the precision finishing grindstone 14b with respect to the plate-making roll.
[Figure 3 The preferred embodiment of the correction polishing which is the main part of the gravure plate manufacturing method of the eleventh invention of the present application is shown, and the gravure plate manufacturing method of the first, third, fifth and seventh inventions is shown. It is a figure for demonstrating the preferable embodiment of correction | amendment grinding | polishing which is one of the structural requirements. (A) shows the diameter value before grinding | polishing for every fixed pitch of a plate-making roll, when polishing a plate-making roll with a grinding stone. (B) is a figure for demonstrating the movement of a grinding | polishing grindstone by showing the diameter value before grinding | polishing of each area of a to-be-made roll with a bar graph of block stacking, and showing the order which removes a block with an arrow and a number.
[Figure 4 It is a process diagram of a method for producing a gravure plate according to the first invention of the present application.
[Figure 5 It is a process diagram of a method for producing a gravure plate according to the second invention of the present application.
[Figure 6 It is a process diagram of a method for producing a gravure plate of the third invention of the present application.
[Figure 7 It is a process diagram of a method for producing a gravure plate according to the fourth invention of the present application.
[Figure 8 It is a process diagram of a method for producing a gravure plate of the fifth invention of the present application.
[Figure 9 It is a process diagram of a method for producing a gravure plate of the sixth invention of the present application.
[Figure 10 It is a process diagram of a method for producing a gravure plate of the seventh invention of the present application.
[Figure 11 It is a process diagram of a method for producing a gravure plate of the eighth invention of the present application.
[Explanation of symbols]
W ... Plate making roll
11b ... Rough finish grinding wheel
12b ... Finishing wheel
13b ... Finishing wheel
14b: Precision finishing whetstone

Claims (9)

By removing the anti-printing film to expose the copper plating respect used printing roll, before or after the resistant printing coating, minimum and maximum diameter value by measuring the diameter of every predetermined pitch from one end to the other end the deviation is applied to the case where 10μm or more, the correction polishing to reduce the deviation of by that diameter roughing grindstone, sequentially performs a surface roughness fine abrasive according落版polishing and roughing grindstone by roughing grindstone, then after copper plating, it was surface roughness fine abrasive by plating epidermis removal polishing and semi-finishing grindstone that by the semi-finishing grindstone turn, further, subjected to surface roughness fine abrasive that by the above finishing grindstone, then perform mirror polishing due by that cylindrical grinding and fine finishing grindstone for precision finishing grindstone, then engraving method, or a manufacturing method of a gravure plate forming the gravure cells by etching method,
Polishing with the rough finishing wheel, intermediate finishing wheel and top finishing wheel,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
Mirror polishing with the precision finishing grindstone described above is performed when the grindstone is free to rotate by disconnecting it from the drive source, and the rotation speed of the plate-making roll is larger than that during precision finishing polishing, and the grindstone is applied to the plate-making roll during precision finishing polishing. A method for producing a gravure plate, characterized in that, by pressing with a polishing pressure of the plate-making roll, the grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. By removing the anti-printing film to expose the copper plating respect used printing roll, before or after the resistant printing coating, minimum and maximum diameter value by measuring the diameter of every predetermined pitch from one end to the other end the deviation is applied to the case where 5μm or less, the surface roughness fine abrasive according by that落版polishing and roughing grindstone in roughing grindstone sequentially performed, then after the copper plating, that by the semi-finishing grindstone plating was surface roughness fine abrasive due to skin removal polishing and semi-finishing grindstone turn, further, subjected to surface roughness fine abrasive that by the above finishing grindstone, then by a cylindrical grinding and fine finishing grindstone that by the fine finishing grindstone A method for producing a gravure plate that performs mirror polishing and then forms a gravure cell by engraving or etching,
Polishing with the rough finishing wheel, intermediate finishing wheel and top finishing wheel,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. A method for producing a gravure plate, which is carried out by pressing with a polishing pressure at the time of polishing, and rotating the plate-making roll to rotate the plate-making roll and moving the wheel in the surface length direction of the plate-making roll. The printing plate is removed from the used printing roll to expose the copper plating, and before or after the printing plate, the diameter is measured at a constant pitch from one end to the other, and the minimum and maximum diameter values are measured. the deviation is applied to the case where 10μm or more, the correction polishing to reduce the deviation of by that diameter roughing grindstone, sequentially performs a surface roughness fine abrasive according落版polishing and roughing grindstone by roughing grindstone, then after copper plating, was surface roughness fine abrasive by plating epidermis removal polishing and semi-finishing grindstone that by the semi-finishing grindstone turn, then, subjected to mirror polishing by cylindrical grinding and fine finishing grindstone that by the fine finishing grindstone Then, a gravure plate manufacturing method for forming a gravure cell by engraving or etching,
Polishing with the rough finishing wheel and the intermediate finishing wheel,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. A method for producing a gravure plate, which is carried out by pressing with a polishing pressure at the time of polishing, and rotating the plate-making roll to rotate the plate-making roll and moving the wheel in the surface length direction of the plate-making roll. The printing plate is removed from the used printing roll to expose the copper plating, and before or after the printing plate, the diameter is measured at a fixed pitch from one end to the other, and the minimum and maximum diameter values are measured. the deviation is applied to the case where 5μm or less, the surface roughness fine abrasive according by that落版polishing and roughing grindstone in roughing grindstone sequentially performed, then after the copper plating, that by the semi-finishing grindstone plating sequentially performed surface roughness fine abrasive due to skin removal polishing and semi-finishing grindstone, then subjected to mirror polishing by cylindrical grinding and fine finishing grindstone that by the fine finishing grindstone, then engraving method, or gravure cells by etching method A gravure plate forming method,
Polishing with the rough finishing wheel and the intermediate finishing wheel,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. A method for producing a gravure plate, which is carried out by pressing with a polishing pressure at the time of polishing, and rotating the plate-making roll to rotate the plate-making roll and moving the wheel in the surface length direction of the plate-making roll. The coating imparting the printing durability of the used printing roll is removed, and then the ballad copper plating is cut and removed to form a plate-making roll in which the copper-plated cylindrical surface is exposed, and the ballad is again applied to the plate-making roll. Applicable when copper plating is laminated and the diameter is measured at fixed pitches from one end to the other end of the plate making roll before or after the ballad copper plating, and the minimum and maximum deviation of the diameter value is 10 μm or more. , was surface roughness fine abrasive due to the correction polishing and medium-finishing grindstone to reduce a deviation that by the semi-finishing grindstone diameter turn, further, subjected to surface roughness fine abrasive that by the above finishing grindstone, then precision perform mirror polishing due by that cylindrical grinding and fine finishing grindstone for finish grinding, then engraving method, or a manufacturing method of a gravure plate forming the gravure cells by etching method,
Polishing with the above-mentioned intermediate finishing grindstone and top finishing grindstone,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
Mirror polishing with the precision finishing grindstone described above is performed when the grindstone is free to rotate by disconnecting it from the drive source, and the rotation speed of the plate-making roll is larger than that during precision finishing polishing, and the grindstone is applied to the plate-making roll during precision finishing polishing. A method for producing a gravure plate, characterized in that, by pressing with a polishing pressure of the plate-making roll, the grindstone is rotated along with the rotation of the plate-making roll and the grindstone is moved in the surface length direction of the plate-making roll. The coating imparting the printing durability of the used printing roll is removed, and then the ballad copper plating is cut and removed to form a plate-making roll in which the copper-plated cylindrical surface is exposed, and the ballad is again applied to the plate-making roll. Applicable when the copper plating is laminated and the diameter is measured at constant pitch from one end of the plate making roll to the other end before or after the ballad copper plating, and the minimum and maximum deviation of the diameter value is 5μm or less. , was surface roughness fine abrasive according by that plating epidermis removal polishing and semi-finish grinding wheel to semi-finishing grindstone turn, further, subjected to surface roughness fine abrasive that by the above finishing grindstone, then the fine finishing grindstone that perform mirror polishing by cylindrical grinding and fine finishing grindstone, then engraving method, or by etching method a manufacturing method of a gravure plate forming the gravure cells, finishing grindstone and upper finishing among the Polishing by stone,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. A method for producing a gravure plate, which is carried out by pressing with a polishing pressure at the time of polishing, and rotating the plate-making roll to rotate the plate-making roll and moving the wheel in the surface length direction of the plate-making roll. The coating imparting the printing durability of the used printing roll is removed, and then the ballad copper plating is cut and removed to form a plate-making roll in which the copper-plated cylindrical surface is exposed, and the ballad is again applied to the plate-making roll. the copper plating are stacked, then measuring the diameter of every predetermined pitch from one end of the plate-making roll to the other, it applied to the case minimum and maximum deviations of the diameter value is 10μm or more, Ru good in the semi-finishing grindstone sequentially performed surface roughness fine abrasive due to the correction polishing and medium-finishing grindstone to reduce the diameter deviation, then subjected to mirror polishing by cylindrical grinding and fine finishing grindstone that by the fine finishing grindstone, then engraving method, or food A gravure plate manufacturing method for forming a gravure cell by engraving,
Polishing with the intermediate finishing wheel
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. A method for producing a gravure plate, which is carried out by pressing with a polishing pressure at the time of polishing, and rotating the plate-making roll to rotate the plate-making roll and moving the wheel in the surface length direction of the plate-making roll. The coating imparting the printing durability of the used printing roll is removed, and then the ballad copper plating is cut and removed to form a plate-making roll in which the copper-plated cylindrical surface is exposed, and the ballad is again applied to the plate-making roll. the copper plating are stacked, then measuring the diameter of every predetermined pitch from one end of the plate-making roll to the other, it applied to the case minimum and maximum deviations of the diameter value is 5μm or less, Ru good in the semi-finishing grindstone the surface roughness fine abrasive by plating epidermis removal polishing and semi-finishing grindstone sequentially performs gravure, then subjected to mirror polishing by cylindrical grinding and fine finishing grindstone that by the fine finishing grindstone, then engraving method, or by etching method A method for producing a gravure plate forming a cell,
Polishing with the intermediate finishing wheel
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. By being in a state perpendicular to the rotation axis of the plate-making roll, the chord line parallel to the diameter line outside the center hole of the end face of the grindstone is in contact with the bus bar of the plate-making roll,
In addition, polishing with the precision finishing grindstone described above,
The extension line of the rotation axis of the grindstone is not crossed with the rotation axis line of the plate-making roll, and the extension line of the rotation axis of the grinding wheel is covered with the extension line of the rotation axis of the grinding wheel and the rotation axis line of the plate-making roll. A state in which half of the chord line parallel to the diameter line off the center hole of the end face of the grindstone is brought into contact with the bus bar of the plate-making roll by being in an intersecting state inclined by 0.5 degrees from the right angle with respect to the rotation axis of the plate-making roll Done in
In addition, the above-mentioned mirror polishing with a precision finishing wheel removes the connection of the grinding wheel to the drive source so that it can rotate freely, and the number of rotations of the plate-making roll is larger than that during precision finishing polishing, and the grinding wheel is precisely finished on the plate-making roll. A method for producing a gravure plate, which is carried out by pressing with a polishing pressure at the time of polishing, and rotating the plate-making roll to rotate the plate-making roll and moving the wheel in the surface length direction of the plate-making roll. In the correction polishing, the grinding wheel is in close contact with the plate-making roll and moved in one direction while keeping the polishing pressure constant for the minimum measured diameter value of each section measured at a fixed pitch from one end of the plate-making roll to the other end. The diameter value before polishing in each section corrected to a value approximated to be four times the single polishing size when the polishing is performed, the polishing wheel is in close contact with the plate making roll and the polishing pressure is kept constant, and the reciprocating movement is repeated. By polishing, the entire length of the plate making roll is polished to a uniform diameter smaller than the minimum diameter value before polishing by one reciprocation, and the polishing margin part larger than the minimum diameter value before polishing is the diameter value before polishing. In this case, if there is a continuous polishing allowance portion in each section, the continuous section is reciprocated, and the polishing allowance portion still exists after performing the reciprocating polishing at least once. When you leave The polishing movement is made so as not to overlap the section that has already been polished to the minimum diameter value before polishing to reach the polishing allowance portion, and the polishing allowance portion is reciprocated and polished until there is no polishing allowance portion larger than the minimum diameter value before polishing. The gravure according to any one of claims 1, 3, 5 and 7, wherein the gravure is a movement in which the remaining section which has already been polished to the minimum diameter value before polishing is moved to the other end of the plate-making roll. How to make a plate.

Images