Balanced out bar section reasons behind and solutions - Benz Star2000 - China Launch X431 Scanner

In offset printing practice, "section bar" is really a frequent and challenging solve the issue of printing quality. "Bar section," in connection with the assembly level printer inside Design Mechanical parts with material and processing technology, the staff in the operation, selecting printed materials, machinery equipment maintenance along with factors. In press have a "section bars" is principally caused by printing machine and inking the printing cylinder, water agencies received paper exercise or paper generated in the process of vibration, allowing the relative position on the slip imprinted. Therefore, our existing level printing equipment and technology are unable to eliminate the "bar section," generation, are only able to be through improved technology and operational processes to minimize, mitigate "section bar" generation.

1, drum gear backlash is too largerge

center distance adjustment resulting backlash is way too large.

Cancel out the roller gear which can be basically helical gears meshing, the exchange coefficient plus the transmission gear, gear backlash less space, to lessen the transmission of impact and vibrations during printing to maintain printing the smoothness and accuracy. Practical work, drum gear mesh backlash because the thickness of printing paper and transform different adjustments, the thicker the paper, the center distance adjustment is widening, roller gear mesh surface exchange coefficient is comparatively smaller, bigger backlash. Printing rollers speed distinction between the top of larger printing surface produced by the larger relative slip f, a lot more obvious section bars.

Solution: to make certain proper printing pressure within the premise, a few rollers should minimize the center distance relating to the appropriate compression gear backlash, reduce the "bar section" level.

gear backlash a result of depreciation too.

Operation over time of work, as a result of load roller gear wear or groove on the existence of foreign body, producing excessive gear mesh backlash, not involute gear meshing distinctive line of uniform rolling by, or foreign body "Top Gear" makes gear vibrations occur during operation, in order that increased friction involving the roller, sliding, sliding the printing graphic section of the moment on this production with equal gear pitch ribbon, that may be, Article gearshift. Solution: usually to strengthen the effort for cleaning and maintenance machinery and equipment, neat and remove debris between gears, good lubrication; beneath gear wear, re-adjust the middle distance calculation, the right compression backlash, wear serious immediate replacement Gear.

2, bearing wear rollers bearing wear. Offset Machine having a extended period, especially never to go roll pillow rollers, the movement, large impact vibration, bearing usage with less effort produced, making the gap between journal and bearing the increase of nested loose rollers together when Diao mouth pressure because of the vibrations from occurring to make the organization of sliding friction "section bar." Particularly unusual loads or poor lubrication, the roller shaft and bushings and wear increased, most likely on the mouth with the Diao produce "section bar."

Solution: can be rubber liner in the mouth section of the cut Diao ladder so as to slow up the impact if the combined pressure of intensity, roller bearings badly worn bearings must be updated yet.

ink ball bearing wear. Water, roller bearings, bearing housings, bearing lock pieces containing debris or wear also can produce water, a lot of it roller inside movement with the axial movement and runout causing "clause bars" specifically, channeling the sleeve or roller gear wear, the roller gear meshing vibration generated from the normal absorption of water channeling roll, ink absorption and transmission, triggering "section bar" appear.

3, ink roll wear

Roller for a while, because of clean dust, paper, hair, skin ink and also other debris, or improper installation, pressure regulators, and also other factors uneven ink rollers are worn, uneven surface or perhaps a roller axis line not straight, serious roller 2 when fine or coarse the midst of the deformation with the middle of coarse 2 fine. Offset press work will resulted in beating of rollers, producing increased friction caused by intermittent partial strip "section bar."

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