The function and maintenance of the receiving toot

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The function and maintenance of the paper receiving toothed plate of Heidelberg printing machine

Heidelberg printing machine and then unscrewing the screw of the exhaust hole of the oil collecting tank was introduced into China in the middle and late 1980s. It has good performance, wide uses, fast printing speed and guaranteed printing quality, and is the first choice of many printing enterprises. Production operators should be familiar with the functions of various parts carefully, and better learn to use and maintain them, so as to make them excellent equipment with "high quality, high yield and low consumption"

(I) function and performance of the paper receiving tooth row

when the printing equipment is in normal operation, the paper receiving tooth row receives each printed matter from the roller teeth according to the mechanical transmission operation law and transmits it to the next color roller teeth. Because it is driven by multiple teeth, the transmission is very compact and the reception is accurate. It is a key component for reliable travel transmission. Once the paper receiving teeth are loose and misaligned, it will directly affect the normal work of the paper receiving teeth. The tooth displacement is too large or too small, and even some teeth have no root. It will not connect the paper, resulting in paper dropping, glue wrapping and various adverse consequences, which will affect the quality of products and the accuracy of overprint. If the tooth row is too tight, there will be serious paper tearing. Therefore, the more advanced the equipment is, the more important it is to improve the use skill level and professionalism of production operators. We should not blindly pursue the output to make the equipment overspeed and cause equipment overdraft. It is a short-term effect. To shorten the service life of printing equipment, we should work hard on the qualified rate of printing products, which is an effective way

(II) correctly and scientifically use the paper receiving toothed row

due to the wide range of printing specifications of Heidelberg printing machine, plastic is used to replace steel, glass, wood and other materials, such as eight and sixteen. There are many kinds of paper, including single copper, double copper, offset paper and card paper. This requires the production operators to adjust and use the paper receiving teeth according to different specifications and different papers. Generally, the printing plate will be centered and upward, and the central part of the paper receiving tooth row is relatively easy to be damaged. Therefore, the operators are reminded to pay attention to the changes of the toothed seat of the paper receiving tooth row, and replace it in time if it is found that it is worn thin and the steel sheet is damaged. However, some operators bother to stick it with scotch tape at leisure, which is wrong, and it is also the work attitude. It has superior chemical resistance and is not rigorous. You should know that once the adhesive tape falls off and compound on the printing plate, the consequences are self-evident

after each print is produced, be sure to check whether there is any change in the tooth row. Then check whether the biting force of the tooth seat is consistent one by one with a piece of paper. Only after it is unified can all the paper be received. If the big teeth are not tight, the paper transmission will be skewed

(III) discrimination and causes of abnormal operation of the paper receiving toothed row

1. Generally, before production operations, carefully watch the handover records, jog first, and then drive slowly. If it is not abnormal, it can run at normal speed. Check whether the automatic stop device of the equipment is sensitive and effective during production every day. The operators are very clear that the automatic shutdown does not work or fails, which means that when the paper suction and feeding are not accurate, the equipment cannot stop automatically immediately, and the paper receiving tooth row cannot be protected

2. the printing drum should not be too thick in the lining, and generally should not be higher than the drum tooth base. When changing the roller paper, be sure to wrap it tightly, so that the paper feeding toothed row and the paper receiving toothed row are at the same angle when transferring paper. It will not allow the paper receiving toothed row to be collided and hinder the regular operation of the toothed row

3. the equipment encountered a field version when printing a large number of sheets. At this time, the paper receiving tooth row bears a large load, so the tension force of the tooth row must be adjusted, and the paper pressing rod must be added to make the larger paper fall on the paper receiving table smoothly and neatly

4. the printing speed of the equipment is relatively high during normal operation. At this time, the machine assistant should immediately turn on the automatic lifting paper table, because the lifting paper table is divided into two switches. If you only open the paper lifting and neglect to open the paper lowering, it is likely to crash the paper receiving tooth row, and the consequences are serious

5. Heidelberg printing machine has two paper receiving teeth, which cooperate closely in normal operation. Once a tooth row breaks down, you should stop immediately for inspection. Which tooth row has the problem? Repair it after diagnosis

6. Generally, large printing enterprises have a two-hour equipment maintenance time every week, which should be carefully implemented. Carefully clean the paper scraps and dust on the paper receiving tooth row, and check whether the inlays at both ends of the tooth row are loose. Then fill with oil

7. when the paper receiving teeth have problems, and the paper is not held in its mouth or tilted in its mouth, don't blindly tighten the screws of each tooth seat, which has been widely used in many aspects. Doing so will start to backfire. It should be determined by the size of the regular teeth and sheets on each row. If there is no production yet, please ask the machine maintenance personnel to participate in the repair. (end)

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