The hottest oil ink pump flow control method I

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One method of ink pump flow control (bottom)

check carefully, (5) the loading is unstable, and the pressboard of the side gauge is appropriate in height, and there is no burr on it; The lower regular plate also has no protrusions and burrs that hinder the normal positioning of the paper; The paper pulling time of side gauge is normal. So, what is the problem? It is suspected that there is a problem with the paper puller. Remove the pull-down paper wheel, move it by hand, and it rotates well. Drop a few drops of oil on the roller ball and move it by hand for several times. The roller rotates well without pause. The paper pulling wheel is normal. Wipe the oil spilled on the roller ball and prepare for installation. Before installation, further check the stretching, and the operator toggles the roller several times, one of which feels a slight pause in the rotation of the roller. After careful re inspection, it was finally found that the roller was slightly stuck at a certain position. It was found that one of the seven balls on the roller was worn. Replace the new roller, start printing, and the phenomenon that the side gauge pulls the paper not in place disappears

in order to prevent this kind of hidden input of known parameters for automatic experimental failure, it is best to replace the side gauge paper pulling roller once a year

wonderful use of medical gauze

once, when our factory printed a batch of large field prints with beiren pz4880 split four-color offset press, there was a problem that the prints rubbed dirty

analyze the reason: at ordinary times, our factory rarely undertakes to print field prints, and there is no blue cloth or anti rubbing dirty sandpaper on the paper transfer drum of the machine. Because such auxiliary materials are expensive, the factory has no reserves. This batch of printing happened to coincide with the weekend, and there was nowhere to buy the auxiliary materials. In a hurry, we turned to a peer and got a very economical and practical solution

the specific operation is as follows: paste a piece of medical wide gauze on the paper transfer drum with glue or thin paste, then spread the cotton yarn smoothly, start printing, eliminate the problem of rubbing the printed matter, and the printing effect is good. Note: before brushing glue or paste, be sure to thoroughly clean the paper transfer drum to avoid affecting the smoothness of pasting

the complications caused by electrical maintenance errors are eliminated

once, the 08 machine of our factory failed and did not operate. Shaking the machine manually did not feel very heavy. The electrician checked that the button was OK and the fuse was in good condition. Finally, it was found that a relay was broken. After replacement, the machine was started up and operated, but the FedEx stopped as soon as the paper was gone. It is suspected that Feida has no problem, and the dual controller is in good condition. Is it suspected that the clutch is slipping? After the needle top spring is pushed tight and fixed, try the machine, and then stop when Feida still leaves the paper. Check whether the clutch block is worn and cannot be engaged? Loosen and check. The clutch clutch block is indeed worn. File the worn part with a file. There is still a problem in the test machine. Check again whether the spine cannot be grasped or the ratchet cannot hang? Open the small shield on the side of Feida, and sure enough, I found that the pawl turned up. Turn it right and then turn on the paper. The pawl turned up again. What caused the pawl to fail to work normally? We found that the machine was reversed rather than forward, which was originally caused by the electrician connecting the wrong wire head in the electrical box when replacing the relay. Reconnect the wire, turn on the machine, and everything returns to normal. The service innovation is normal. The phenomenon that Feida stops when it leaves the paper is gone

from the beginning to the end of the troubleshooting, we feel that the normal line is the guarantee for the normal operation of the machine, and it is more important to improve the level and heart of electrical technology

os-02 three sided book cutter stepless speed regulation motor failure maintenance

in the peak season of book printing, a os-02 three sided book cutter in our factory failed. Due to the small motor circuit and operation controlling the speed regulation, a pair of synchronous spur gears on the host governor of its stepless high-speed three-phase AC commutator motor were damaged by three teeth each, and it was difficult to buy spare parts; I designed metal spare parts myself, and because of the complex structure, high process requirements, the small machinery factory refused to accept it, and the large machinery factory refused to accept it, resulting in the shutdown of the three side book cutting machine, and the whole production line could not operate and publish books normally

in a hurry, we analyzed the structure of the parts and their stress conditions, and adopted the method of retaining the core and inlaying the tooth ring to solve it. The specific operation method is: remove the damaged positive teeth with one car, make a tooth, fit it with the core by interference, and connect it with... With three pins with a diameter of 2mm. This method is simple and fast to repair, and the three side book cutter can resume production in the shortest time, which has won time for us to publish the book on schedule

love the new and hate the old in printing and typesetting

the word "love the new and hate the old" is very suitable to describe the development and update of printing and typesetting technology. It is also extremely appropriate to use this word to compare the changes of typesetting technology in our factory. In just over a decade, the printing and typesetting technology of our factory has gone through the stages of lead typesetting, photo typesetting, separate production of pictures and texts, and combined production of pictures and texts, and is still upgrading. Now, local area, broadband and other network technologies are integrated into the printing and typesetting, from simple to complex, from low-level to high-level, which solves the problems of graphic transmission and data sharing in the printing and typesetting process. Digital document management has gradually formed a large-scale production capacity

I can see from the development and practical application of typesetting technology that the times are developing and science and technology are progressing. Only by constantly learning and mastering new technologies and using new technologies, can we not be invincible and not be eliminated

a case of side gauge paper pulling failure

a J2108 offset press in our factory has irregular paper pulling failure, but the upper and lower rules are very neat

after inspection, it was found that the side gauge had not been pulled in place, and the paper delivery teeth had been closed prematurely on the dental table, resulting in irregular paper pulling in place. After careful inspection, it was found that the closing teeth and protruding wheels of the paper delivery teeth were worn, the paper pressing wheel of the side gauge had not been lifted, the paper was caught by the paper delivery teeth, and there was obvious paper grabbing between the paper delivery teeth and the side gauge. Adjust and repair the worn closed teeth protruding wheel of the paper delivery tooth. When the protruding wheel is seriously worn, it needs to be replaced. Try the machine for printing, and the phenomenon of irregular paper pulling and not in place is eliminated

troubleshooting of ghosting of offset press

our factory has newly purchased a second-hand Heidelberg 102vp four-color offset press. The purchased machine has been idle for more than one year in bulk in a single group. After installation and debugging by our technicians, it can operate normally

try this machine for the first time, print with offset paper, the printing color sequence is black, cyan, magenta, yellow and black plate embossing, the color plate density, the regular line registration of various color plates, etc., are all normal. When changing the coated paper after printing, especially when printing the flat bottom color with a large area, it is found that the ink depth of the third color group is different. First of all, it was judged that there was a problem with the ink roller. After inspection, the problem was still not solved after high speed. After careful observation, it was found that there was a bit of ghosting in the printed matter


1. If the transfer ghosting is caused by the poor handover of the paper teeth, that is, there is displacement during the handover of the paper, the ghosting should first appear on the first color group. Check the sample of the first color group, and there is no ghosting on the words, black lines and equality from its mouth to its trailing tip. Therefore, such factors are excluded

2. the reason may be that the plate cylinder is aging and cannot be locked, and the plate cylinder moves axially or circumferentially. Check the print and ensure that the regular line overprint is accurate. You can also rule out ghosting caused by the movement of the plate cylinder

3. it may be that the rubber drum moves. Measure the circumference of the rubber drum with a dial indicator, and the runout value is 0.02mm, which is normal; Measuring the axial direction, it is found that the displacement of the rubber drum reaches 0.8mm. That seems to be the problem

solution: disassemble the protective cover of the operating surface of the printing machine, remove the spring plate on the shaft head, and check the thrust bearing outside the shaft sleeve, which is not damaged; Remove the shaft sleeve and continue to check. It is found that the thrust bearing in the sleeve has been ground. Replace the new bearing, test the machine, the axial movement of the rubber drum returns to normal, and the ghosting of the print disappears

suggestion: do not pull too tight when installing the shaft head spring, otherwise the wear of the inner and outer bearings of the shaft sleeve will be accelerated

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