JPH10250045A - Method for cleaning inner face of plate making roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for cleaning an inner face of a plate making roll capable of removing rust on the inner face of the plate making roll by shot blasting and of preventing occurrence of rust by coating a rust-proofing liquid after removing the rust. SOLUTION: A plate making roll R is stood to be chucked by means of chuck cones 2, 3 and an insertion pipe 4 for shot blasting is inserted to supply a compressed air and shot blast particles. The insertion pipe 4 for shot blasting is lowered and the plate making roll R is rotated, then the shot blast particles ejected from ejector nozzles 5, 6 are collided with the inner face of the plate making roll R to remove rust. The waste shot blast particles are collected from a chucking hole on the lower end of the roll. The residual shot blast particles are removed, then the plate making roll R is taken off and chucked by chuck cones 9, 10. An insertion pipe 11 for a rust-proofing liquid is inserted thereinto and the rust-proofing liquid is sprayed from a spray nozzle 12. The insertion pipe 11 for the rust-proofing liquid is lowered and the plate making roll R is rotated, then the rust-proof film is coated on the whole inner face of the roll.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention removes rust on the inner surface of a plate making roll by shot blasting, and after rust removal, coats a rust preventive liquid to suppress rust generation. The present invention relates to a method for cleaning the inner surface of a plate making roll. 2. Description of the Related Art Plate-making rolls (printing rolls) include those having a roll base made of iron and those made of aluminum.
In a steel plate-making roll, the inner surface of the roll rusts after a long period of time, and as the rust progresses, rust easily comes off from the inner surface of the roll due to vibration or the like. Conventionally, no effective measures have been taken to contain rust on the inner surface of the plate making roll. [0003] Rust released from the inner surface of the roll may adhere to a chucked hole in the end face of the roll when handling an iron plate-making roll. When an iron plate roll attached to a chuck hole is chucked at both ends with a chuck cone of a rotary press or when the chuck is released, the iron plate roll may fall into ink in an ink tray. The rust that has fallen into the ink tray ink is stirred by the finisher roll, so the ink attached to the plate-making roll contains rust, and when scraped off by a doctor, the plate surface of the plate-making roll is scratched with rust. Therefore, it was necessary to contain the rust on the inner surface of the plate making roll. Therefore, at present, there are about 200 million iron plate-making rolls, and it is extremely important to contain rust on the inner surface of the plate-making roll. The present invention has been devised in view of the above points, and removes rust on the inner surface of a plate-making roll by shot blasting, and after rust removal, coats a rust-preventive liquid to suppress the generation of rust. It is an object of the present invention to provide a method for cleaning the inner surface of a roll. According to the first invention of the present application, a plate-making roll is set up, a shot blasting insertion tube is inserted into the roll from above, and a relative movement is given to the shot blasting insertion tube. At the same time, the plate making roll is given relative rotation, and the compressed air and the shot blast granules are separately fed to the shot blasting insertion tube, merged with the ejector nozzle, and the shot blast granules are compressed using the compressed air. A method for cleaning the inner surface of a plate-making roll, characterized in that rust adhered to the inner surface of the roll is removed by spraying and colliding with the inner surface of the roll, and used shot blast particles are collected from a chucked hole at the lower end of the roll. Is to do. According to the second invention of the present application, a plate-making roll is set up, upper and lower chuck holes are chucked at both ends with a pair of hollow chuck cones, and a shot blasting insertion tube is inserted into the roll from above to form a shot blasting roll. The compressed air and the shot blast particles are separately fed to the insertion tube, the shot blast particles are ejected from the ejector nozzle, and the insertion tube is relatively moved and the plate making roll is relatively rotated to give a roll. Removes rust adhering to the inner surface,
An object of the present invention is to provide a method of cleaning the inner surface of a plate making roll, wherein used shot blast particles are collected from a chucked hole at the lower end of the roll. [0007] The third invention of the present application is directed to a plate making roll in which, after shot blasting, vacuum suction or high pressure air blowing is performed by a vacuum pipe or a high pressure air blowing pipe integrally provided inside or outside the shot blasting insertion pipe. It is an object of the present invention to provide a method of cleaning the inner surface of a plate-making roll, wherein the shot blast particles remaining in the plate are sucked and collected or blown out from a lower chucked hole and discharged. The fourth invention of the present application is directed to a shot blast granule remaining in a plate-making roll, after a shot blast insertion tube is withdrawn from the roll, a vacuum tube or a high-pressure air blowing tube is inserted into the roll. The present invention is to provide a method of cleaning the inner surface of a plate making roll, characterized by sucking and recovering, or blowing out and discharging from a lower chucked hole with high pressure air. According to a fifth aspect of the present invention, a plate-making roll having been subjected to shot blasting is released from the chuck, chucked by a pair of separately provided chuck cones, and a rust-preventing liquid insertion pipe is inserted into the inside of the roll. The rust-preventive liquid is fed to the liquid insertion pipe, and the rust-preventive liquid is sprayed from a spray nozzle provided at the lower end of the pipe. It is characterized in that the entire inner surface of the roll is coated with a rust preventive film by applying rotation.
An object of the present invention is to provide a method for cleaning the inner surface of a plate making roll. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for cleaning the inner surface of a plate making roll of the present invention will be described with reference to FIG. The method for cleaning the inner surface of a plate making roll according to this embodiment is shown in FIG.
As shown in (a), the plate making roll R is set up by fitting into the lower chuck hole of the plate making roll R on the lower hollow chuck cone 2 rotated by the motor 1. The plate-making roll R is rotatably chucked at both ends by lowering the rotatable chuck cone 3 and fitting the chuck cone 3 into the chucking hole on the upper side of the plate-making roll R. Next, as shown in FIG. 1A, the shot blasting insertion tube 4 is lowered and inserted into the roll through the hollow hole of the upper chuck cone 3, and the lower end of the shot blasting insertion tube 4 is rolled. It is located in the upper part. Next, as shown in FIG. 1A, compressed air and shot blast particles (abrasive material) are supplied to two of three passages (not shown) in the shot blasting insertion tube 4. I do. The shot blast particles are fed from an upper hopper (not shown), and the compressed air is fed by an air compressor (not shown). The two passages for feeding the compressed air and the shot blast particles are respectively joined to the two ejector nozzles 5 and 6 provided at the lower end of the shot blasting insertion tube 4 so that each ejector nozzle 5 , 6, and at the same time, the shot blast particles are injected by using the compressed air to collide with the inner surface of the roll. The ejection angle of the ejector nozzle 5 is upward, for example, 30 to 60 degrees, and the ejection angle of the ejector nozzle 6 is downward, for example, 30 to 60 degrees. Next, as shown in FIGS. 1 (a) and 1 (b), the shot blasting insertion tube 4 is lowered at a low speed, and the motor 1 is driven to apply rotation to the plate making roll R, thereby ejecting the ejector. The shot blast granules ejected from the nozzles 5 and 6 form an inner end surface on the upper side of the plate making roll R,
The inner peripheral surface and the lower inner end surface are evenly collided with each other to remove rust adhering to the inner surface of the roll, and used shot blast particles are collected from the chucked hole at the lower end of the roll. The collected shot blast particles are guided to a rust removing device to remove rust, and then returned to an upper hopper by a transfer device for circulating use. When the lower end of the shot blast insertion tube 4 is lowered to the lower portion in the roll, the supply of the compressed air and the shot blast granules is stopped, and the shot blast is completed. When the shot blasting is completed, the shot blasting particles remain on the lower inner end face of the plate making roll R. Accordingly, a vacuum nozzle 7 provided at the lower end of the shot blast insertion tube 4 is driven by driving a vacuum generation device (not shown) through the remaining one of the three passages (not shown) in the insertion tube 4 for shot blast. 1
As shown in (c), the remaining shot blast particles are collected by suction. Next, as shown in FIG. 1 (d), after the shot blasting insertion tube 4 is lifted and pulled out of the roll, the upper chuck cone 3 is raised and the plate making roll R is removed. Then, as shown in FIG. 1 (e), the rust-removed roll R is fitted on the lower chuck hole 9 on the lower hollow chuck cone 9 rotated by the motor 8. Then, the plate making roll R is set up, and the upper rotation-free chuck cone 10 is lowered to fit into the upper chucking hole of the plate making roll R, thereby forming the plate making roll R.
Is rotatably chucked at both ends. Next, the rust-preventive liquid insertion tube 11 is lowered and inserted into the inside of the roll through the hollow hole of the upper chuck cone 10, and the lower end of the rust-preventive liquid insertion tube 11 is positioned at the upper part in the roll. Next, a pump (not shown) is driven to feed a rust preventive liquid (oil-based rust-proof paint or oil-based ink) into the rust-preventive liquid insertion tube 11, which is provided at a lower end of the rust-proof liquid insertion tube 11. The rust preventive liquid is sprayed on the entire inner surface of the roll by spraying the rust preventive liquid from the spray nozzle 12 and lowering the rust preventive liquid insertion pipe 11 and driving the motor 8 to rotate the plate making roll R. Coating with anti-rust coating. The present invention may be the following embodiments. (1) In the above embodiment, the shot blasting insertion tube is lowered and inserted into the roll, but the plate-making roll is raised and the shot blasting insertion tube is inserted into the roll. good. (2) In the above embodiment, the shot blast granules are sprayed while descending the shot blasting insertion tube, but the lower end of the shot blasting insertion tube is positioned at the lower portion in the plate making roll. The shot blast particles may be ejected while the shot blast insertion tube is relatively raised. (3) In the above embodiment, the shot blast granules are sprayed onto the inner peripheral surface of the plate making roll by giving relative rotation to the plate making roll, but the shot is made without rotating the plate making roll. The shot blast particles may be sprayed onto the inner peripheral surface of the plate making roll by rotating the blasting insertion tube. (4) In the above embodiment, after removing rust adhered to the inner surface of the roll by shot blasting, the shot blast particles remaining on the lower inner end surface of the plate making roll are suctioned and collected. High-pressure air may be fed into the passage of the insertion tube, ejected from the nozzle at the lower end, and discharged from the chucked cone below the plate-making roll. (5) In the above embodiment, after the shot blasting, the remaining shot blast particles are collected by suction without releasing the roll chuck, but the remaining shot blast particles are removed after the roll chuck is released. May be. (6) In the above embodiment, the shot blast particles remaining in the plate making roll are sucked and collected through the passage provided inside the shot blast insertion tube. The shot blast particles remaining in the plate making roll may be sucked and collected through a passage provided integrally with the outside of the insertion tube. (7) A vacuum pipe or a high-pressure air blowing pipe for blowing and discharging the shot blast particles as a passage for sucking and collecting the shot blast particles is provided so as to be vertically movable independently of the shot blast insertion tube, After removing the insertion tube from the inside of the roll, do not release the roll chuck, insert the vacuum tube or high-pressure air blow-out tube relatively down and insert it into the roll, and shot blast remaining in the plate-making roll. The granules may be collected by suction or blown out from the lower chucked hole with high-pressure air and discharged. (8) In the above embodiment, with regard to the step of coating the rust-preventive film, the rust-preventive liquid insertion pipe is lowered and inserted into the roll, but the plate-making roll is raised to insert the rust-preventive liquid. The tube may be lowered and inserted inside the roll. (9) In the above embodiment, in the step of coating the rust-preventive film, the plate-making roll is rotated and the rust-preventive liquid insertion tube is moved to perform the coating. Alternatively, the coating may be performed by rotating the rust preventive liquid insertion tube. (11) In the above embodiment, with respect to the step of coating the rust-preventive film, the plate-making roll is set up and the roll chuck is performed, and the rust-preventive liquid insertion pipe is moved up and down to insert the inside of the roll. However, the plate-making roll may be horizontal and the roll chuck may be performed, the rust preventive liquid insertion pipe may be horizontally moved and inserted into the roll, and the rust preventive liquid may be sprayed from a spray nozzle. According to the method for cleaning the inner surface of a plate making roll according to the first invention of the present application, rust on the entire inner surface of the plate making roll can be removed by shot blasting. According to the method of cleaning the inner surface of a plate making roll of the second invention of the present application, it is possible to remove rust on the entire inner surface of the plate making roll by shot blasting, and insert the shot blasting insertion tube into the inside of the plate making roll. Ideally, the plate-making roll can be chucked and rotated. According to the method of cleaning the inner surface of the plate making roll of the third invention of the present application, it is possible to remove the rust of the entire inner surface of the plate making roll by shot blasting, and furthermore, without pulling out the shot blasting insertion tube and also by using the roll chuck. The shot blast particles remaining in the lower portion of the inside of the plate making roll can be removed without releasing the sheet without releasing the time. According to the method of cleaning the inner surface of a plate making roll of the fourth invention of the present application, it is possible to remove rust on the entire inner surface of the plate making roll by shot blast, and further, without releasing the roll chuck, without requiring time. In addition, shot blast particles remaining in the lower portion of the inside of the plate making roll can be removed. According to the method for cleaning the inner surface of a plate making roll of the fifth invention of the present application, rust on the entire inner surface of the plate making roll can be removed by shot blasting, and the generation of rust can be suppressed by coating a rust prevention film. Yes, and
Since the roll chuck in the shot blast process and the rust prevention coating are not shared with the roll chuck in the coating process,
The rust preventive liquid is not mixed into the shot blast particles, and the circulating use of the shot blast particles is ensured, and the explosion proof control of the flammable solvent contained in the rust preventive liquid can be separated from the shot blast process.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a method for cleaning the inner surface of a plate making roll of the present invention, in which (a) is a vertical front view at the start of a shot blasting step, and (b) ) Is a vertical front view just before the end of the shot blasting step, (c) is a vertical front view in a state where the remaining shot blast particles are collected by suction,
(D) is a longitudinal sectional front view showing a state in which shot blasting is completed and the roll chuck is released, and (e) is a longitudinal sectional front view at the start of a rust-preventive film coating step. [Description of Signs] 2, 3 Chuck cone R Plate roll 4 Shot blasting insertion tube 5, 6 Ejector nozzle 7 Vacuum nozzle 9, 10 Chuck Cone 11 ・ ・ ・ Insertion tube for rust preventive liquid 12 ・ ・ ・ Spray nozzle

Claims (1)

Claims: 1. A plate-making roll is set up and a shot blasting insertion tube is inserted into the roll from above to give relative movement to the shot blasting insertion tube and relative to the plate-making roll. The compressed air and the shot blast granules are fed separately to the shot blasting insertion tube, fed together by the ejector nozzle, and the shot blast granules are jetted using the compressed air to collide with the inner surface of the roll. Removing the rust adhering to the inner surface of the roll, and collecting used shot blast particles from a chucked hole at the lower end of the roll. 2. A plate-making roll is set up, upper and lower chuck holes are chucked at both ends with a pair of hollow chuck cones, and a shot blast insertion tube is inserted into the roll from above and compressed into the shot blast insertion tube. The air and the shot blast particles are fed separately, the shot blast particles are ejected from the ejector nozzle, and the insert tube is relatively moved and the plate-making roll is relatively rotated to adhere to the inner surface of the roll. A method for cleaning the inner surface of a plate-making roll, comprising removing rust and collecting used shot blast particles from a hole to be chucked at a lower end of the roll. 3. After the shot blast, vacuum suction or high pressure air blowing is performed by a vacuum pipe or a high pressure air blowing pipe integrally provided inside or outside the shot blasting insertion pipe, and the shot blast remains in the plate making roll. 3. The method for cleaning the inner surface of a plate-making roll according to claim 1 or 2, wherein the shot blast particles are sucked and collected or blown out from a lower chucked hole and discharged. . 4. After the shot blasting insertion tube is withdrawn from the inside of the roll, a vacuum tube or a high-pressure air blowing tube is inserted into the inside of the roll, and the shot blast particles remaining in the plate making roll are suctioned and collected. The method for cleaning the inner surface of a plate-making roll according to claim 1 or 2, wherein the high-pressure air blows out the lower-side chucked hole and discharges it. 5. A plate-making roll having been subjected to shot blasting is released from the chuck, chucked by a pair of separately provided chuck cones, and a rust preventive liquid insertion tube is inserted into the inside of the roll. And spray the rust preventive liquid from the spray nozzle provided at the lower end of the pipe.
A method for cleaning the inner surface of a plate-making roll, wherein the inner surface of the plate-making roll is coated with a rust-preventive film by giving a relative movement to the insertion tube for the rust-preventive liquid and a relative rotation of the plate-making roll. .