After careful inspection, the lateral pressure platen is suitable for high and low levels, and there is no burr on it; the lower rule plate also has no protruding burr to prevent the normal positioning of the paper; the side stencil pulls time and is normal. So where is the problem? Suspected problems with pulling the paper wheel. Remove the pull-down roller, hand-push and turn well. Drip a few drops of oil on the roller ball, hand-pull several times, the roller rotation is good, there is no pause phenomenon, pull the paper wheel normal, erase the oil on the roller ball overflow, ready to install. Prior to installation, the pull is further checked, and the operator again uses the toggle wheel several times, one of which has a slight pause in the rotation of the feeler wheel. After careful review, it was finally found that the wheel had a light truck in a certain position. Open the view and notice that one of the seven balls on the roller wears. Replace the new roller, start the printing, the side of the standard pull paper disappears.
In order to prevent this kind of hidden trouble from happening, it is better to renew the side-slide roller.
The magical use of medical gauze once, I plant with the North PZ4880 off four-color offset printing machine printing a group of large field printing products, there is a problem of printing products dirty.
Analysis of the reasons: Usually the factory rarely prints on-site printing products, the machine did not paste the roller on the blue roller net or anti-dirty sandpaper. Because of the relatively high price of such auxiliary materials, there is no reserve in the factory. The batch of Indian prints also happened to coincide with Saturday and Sunday, and there was no place to purchase this supplementary material. In desperation, we turned to a colleague and got a very economical and practical solution.
The specific operation is: a piece of medical wide gauze, glue or thin paste paste on the transfer roller, and then flattened cotton gauze, boot printing, printing products to eliminate dirty defects, and the printing effect is good. Note: Always clean the transfer cylinder thoroughly before brushing or brushing to avoid affecting the smoothness of the paste.
The complications caused by maintenance failures of electrical appliances were eliminated once. Our company's 08 machine malfunctioned and did not operate. Manually shaking the machine did not feel abnormally heavy. After inspection by the electrician, there was no problem with the button, the fuse was intact, and finally it was found that a relay was broken. After the replacement, the machine is turned on, but Federer stops after it stops. Doubt Feida is no problem, double controller is good. Do you suspect clutch slip? After the pin top spring pushes and fixes the test machine, Federer will stop the paper. Check whether the clutch clutch block wear does not fit. Loosen the check. The clutch clutch block is indeed worn. The trowel is used to level the wear and the test machine is still problematic. Check whether it is ratcheting or ratcheting. When I opened the small shield on the side of Feida, I found that the paw was turned upside down. I turned it on and turned it on again. The paw turned upside down. What caused the detent to fail to work properly? We have found that the machine is reversed in reverse, rather than forward. It was originally caused by the electrician replacing the relay's inner header. The thread was reconnected, everything was normal after the start-up operation, and there was no problem with Feida’s paper stopping.
After this breakdown, we feel that the normal line is the guarantee for the normal operation of the machine, and it is even more important to improve the level of electrical engineering and sense of responsibility.
OS-02 three-side cutting machine stepless speed motor fault repair books and printing printing season, our plant a OS-02 three-side cutter failure, due to control of the speed of the small motor circuit and operation and other reasons, resulting in its absence A pair of synchronous spur gears on the main unit governor of the high-speed three-phase AC commutator motor each damaged 3 teeth, which is difficult to buy because of spare parts; the metal spare parts are designed by themselves, and the structure is complex, the process requirements are high, and the small machinery The factory refused to accept it, and the large machinery factory was reluctant to accept such reasons. As a result, the three-sided cutters were shut down, and the entire production line could not be operated and the book was published.
Under the urgency, we analyzed the structure of the parts and their stress conditions, and adopted the method of retaining the core and inserting the teeth to solve the problem. The specific operation method is: only the car to damage the spur teeth, make a tooth, and the core interference fit, with 3 diameter 2mm pins to repair it with ... this method is simple, fast, in the shortest possible time The three sides of the book-cutting machine were resumed production, and we obtained time for the book.
The use of new words in the printing and typesetting to describe the development and renewal of printing and typesetting technology is more appropriate. It is extremely appropriate to use this term to describe the changes in the typesetting process of our factory. In just a dozen years, our plant's printing and typographic technology has gone through lead strips, phototypes, and pictures, and the pictures and texts have been released in stages, and are still being upgraded. Now it integrates network technologies such as LANs and broadband networks into the printing layout. From simple to complex, from low level to high level, it solves the problems of graphic transmission, data sharing and other issues in the process of printing and typesetting. Digital document management gradually forms scale. The production capacity.
I can see from the development and actual application of typesetting technology that the times are developing and science and technology are improving. Only by constantly learning and mastering new technologies and using new technologies can we be invincible and not eliminated.
One case of side-sheet pull-out failure was not found in our J2108 offset press. However, the rules were very neat.
Upon inspection, it was found that the side gauge had not been pulled into place, and the paper handing teeth had been prematurely closed on the dental table, causing irregular paper pulls that were not in place. After careful inspection, it was found that the closed teeth of the paper-handling teeth were worn out, the side gauge roller had not been lifted yet, and the Tooth had pinched the paper. The paper teeth and the side gauge obviously had a paper-grabbing phenomenon. Adjust the worn-out wearer's closed tooth protrusion wheel. When the wheel wear is serious, it needs to be replaced. The test machine prints, and the regular pull paper is not in place.
An example of the problem of offset presses in offset presses. Our factory purchased a second-hand Heidelberg 102VP four-color offset press. The purchased aircraft was idle for more than one year in a single batch. After installation by our factory technicians, it can run normally after debugging.
The machine was first tested, and it was printed on offset paper. The printing sequence was black, cyan, magenta, and yellow, and the black version was imprinted. The color plate density and color plate alignment were all normal. After the change of coated copperplate paper, especially when the screen area of ​​the printing area was relatively large, it was found that the third color group had different shades of ink. First, it was determined that the ink roller was in trouble. After checking, the problem was still not resolved after high speed. After careful observation, it was found that the printed product had a dot ghost phenomenon.
analysis:
1. If the transfer ghost is caused by the poor handling of the grippers, that is, when the paper is displaced at the time of handover, ghosting should first appear on the first color group. Check the first color group proofs, the upper word, black line, flat screen, etc. from the mouth to the tip no ghost phenomenon. So exclude such factors.
2. The reason may be that the rules of the plate cylinder are aged, locked, and the plate cylinder moves axially or circumferentially. Check the printed products, the registration of the rules is accurate. It can also exclude the possibility of ghosting caused by the movement of the plate cylinder.
3. The rubber roller may be turbulent. The circumference of the rubber roller is measured with a dial indicator. The jitter value is 0.02 mm. Normal. When measuring the axial direction, the turbulence of the rubber roller is found to reach 0.8 mm. It seems that the problem is here.
Solution: Open the protective cover of the printing machine operation surface, take off the spring piece on the shaft head, check the thrust bearing outside the shaft sleeve, there is no damage; remove the shaft sleeve to continue checking, and find that the sleeve thrust bearing has been ground. Replace the new bearing, test machine inspection, rubber roller axial turbulence returned to normal, print ghost disappeared.
Recommendation: Do not over-tighten when installing the shaft spring while sleeping, otherwise it will accelerate the wear of the inner and outer bearings of the shaft sleeve.
In order to prevent this kind of hidden trouble from happening, it is better to renew the side-slide roller.
The magical use of medical gauze once, I plant with the North PZ4880 off four-color offset printing machine printing a group of large field printing products, there is a problem of printing products dirty.
Analysis of the reasons: Usually the factory rarely prints on-site printing products, the machine did not paste the roller on the blue roller net or anti-dirty sandpaper. Because of the relatively high price of such auxiliary materials, there is no reserve in the factory. The batch of Indian prints also happened to coincide with Saturday and Sunday, and there was no place to purchase this supplementary material. In desperation, we turned to a colleague and got a very economical and practical solution.
The specific operation is: a piece of medical wide gauze, glue or thin paste paste on the transfer roller, and then flattened cotton gauze, boot printing, printing products to eliminate dirty defects, and the printing effect is good. Note: Always clean the transfer cylinder thoroughly before brushing or brushing to avoid affecting the smoothness of the paste.
The complications caused by maintenance failures of electrical appliances were eliminated once. Our company's 08 machine malfunctioned and did not operate. Manually shaking the machine did not feel abnormally heavy. After inspection by the electrician, there was no problem with the button, the fuse was intact, and finally it was found that a relay was broken. After the replacement, the machine is turned on, but Federer stops after it stops. Doubt Feida is no problem, double controller is good. Do you suspect clutch slip? After the pin top spring pushes and fixes the test machine, Federer will stop the paper. Check whether the clutch clutch block wear does not fit. Loosen the check. The clutch clutch block is indeed worn. The trowel is used to level the wear and the test machine is still problematic. Check whether it is ratcheting or ratcheting. When I opened the small shield on the side of Feida, I found that the paw was turned upside down. I turned it on and turned it on again. The paw turned upside down. What caused the detent to fail to work properly? We have found that the machine is reversed in reverse, rather than forward. It was originally caused by the electrician replacing the relay's inner header. The thread was reconnected, everything was normal after the start-up operation, and there was no problem with Feida’s paper stopping.
After this breakdown, we feel that the normal line is the guarantee for the normal operation of the machine, and it is even more important to improve the level of electrical engineering and sense of responsibility.
OS-02 three-side cutting machine stepless speed motor fault repair books and printing printing season, our plant a OS-02 three-side cutter failure, due to control of the speed of the small motor circuit and operation and other reasons, resulting in its absence A pair of synchronous spur gears on the main unit governor of the high-speed three-phase AC commutator motor each damaged 3 teeth, which is difficult to buy because of spare parts; the metal spare parts are designed by themselves, and the structure is complex, the process requirements are high, and the small machinery The factory refused to accept it, and the large machinery factory was reluctant to accept such reasons. As a result, the three-sided cutters were shut down, and the entire production line could not be operated and the book was published.
Under the urgency, we analyzed the structure of the parts and their stress conditions, and adopted the method of retaining the core and inserting the teeth to solve the problem. The specific operation method is: only the car to damage the spur teeth, make a tooth, and the core interference fit, with 3 diameter 2mm pins to repair it with ... this method is simple, fast, in the shortest possible time The three sides of the book-cutting machine were resumed production, and we obtained time for the book.
The use of new words in the printing and typesetting to describe the development and renewal of printing and typesetting technology is more appropriate. It is extremely appropriate to use this term to describe the changes in the typesetting process of our factory. In just a dozen years, our plant's printing and typographic technology has gone through lead strips, phototypes, and pictures, and the pictures and texts have been released in stages, and are still being upgraded. Now it integrates network technologies such as LANs and broadband networks into the printing layout. From simple to complex, from low level to high level, it solves the problems of graphic transmission, data sharing and other issues in the process of printing and typesetting. Digital document management gradually forms scale. The production capacity.
I can see from the development and actual application of typesetting technology that the times are developing and science and technology are improving. Only by constantly learning and mastering new technologies and using new technologies can we be invincible and not eliminated.
One case of side-sheet pull-out failure was not found in our J2108 offset press. However, the rules were very neat.
Upon inspection, it was found that the side gauge had not been pulled into place, and the paper handing teeth had been prematurely closed on the dental table, causing irregular paper pulls that were not in place. After careful inspection, it was found that the closed teeth of the paper-handling teeth were worn out, the side gauge roller had not been lifted yet, and the Tooth had pinched the paper. The paper teeth and the side gauge obviously had a paper-grabbing phenomenon. Adjust the worn-out wearer's closed tooth protrusion wheel. When the wheel wear is serious, it needs to be replaced. The test machine prints, and the regular pull paper is not in place.
An example of the problem of offset presses in offset presses. Our factory purchased a second-hand Heidelberg 102VP four-color offset press. The purchased aircraft was idle for more than one year in a single batch. After installation by our factory technicians, it can run normally after debugging.
The machine was first tested, and it was printed on offset paper. The printing sequence was black, cyan, magenta, and yellow, and the black version was imprinted. The color plate density and color plate alignment were all normal. After the change of coated copperplate paper, especially when the screen area of ​​the printing area was relatively large, it was found that the third color group had different shades of ink. First, it was determined that the ink roller was in trouble. After checking, the problem was still not resolved after high speed. After careful observation, it was found that the printed product had a dot ghost phenomenon.
analysis:
1. If the transfer ghost is caused by the poor handling of the grippers, that is, when the paper is displaced at the time of handover, ghosting should first appear on the first color group. Check the first color group proofs, the upper word, black line, flat screen, etc. from the mouth to the tip no ghost phenomenon. So exclude such factors.
2. The reason may be that the rules of the plate cylinder are aged, locked, and the plate cylinder moves axially or circumferentially. Check the printed products, the registration of the rules is accurate. It can also exclude the possibility of ghosting caused by the movement of the plate cylinder.
3. The rubber roller may be turbulent. The circumference of the rubber roller is measured with a dial indicator. The jitter value is 0.02 mm. Normal. When measuring the axial direction, the turbulence of the rubber roller is found to reach 0.8 mm. It seems that the problem is here.
Solution: Open the protective cover of the printing machine operation surface, take off the spring piece on the shaft head, check the thrust bearing outside the shaft sleeve, there is no damage; remove the shaft sleeve to continue checking, and find that the sleeve thrust bearing has been ground. Replace the new bearing, test machine inspection, rubber roller axial turbulence returned to normal, print ghost disappeared.
Recommendation: Do not over-tighten when installing the shaft spring while sleeping, otherwise it will accelerate the wear of the inner and outer bearings of the shaft sleeve.
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