Sheet
Sheet-fed offset press due to their structural advantages, more and more become Print The main products of machinery, and quality requirements for printing is also increasing. Domestic manufacturers are also offset from the original monochrome machine, two-color machine production to the four-color machine, multi-color machine development. Each color sheet-fed offset press group mainly by the plate cylinder, rubber roller, pressure roller, transfer roller, and other Ink System components and accessories. Master cylinder directly affects the functioning of precision printing quality is good or bad, for that – whether it will produce overlay, textured, colored inequality has a direct relation. Domestic and foreign well-known printer manufacturers for precision operation of the main drum of the increasingly high demand. The main drum support Bearing Plays a vital role, in order to improve quality and increase the printer greater added value, many printer manufacturers have to improve at all costs bearing requirements.
Sheetfed offset press with the historical development, main drum bearing has gone through many changes. Huang from the earlier Copper Bearings to roller bearings, needle roller bearings to roller bearings from, from single bearings to bearings, bearing rings from the two-to three-ring eccentric bearing. Increasing the precision roller bearing, the installation more convenient and more simple to maintain.
1. Needle roller bearings Needle roller bearings are rigid because of their small diameter than the tapered roller bearing much better developed and bearing displacement of the needle roller bearings double row to rigid brass sleeve bearing with comparable . Compared with ordinary needle roller bearings, used in printer support for needle roller bearings needle group than the normal high. Ordinary needle roller bearings as a unit block to 2 m, and the printer use the needle as a unit block to 1 m. Thus, by selecting the appropriate needle group, you can make the work of bearing clearance is less than 1 m, the operation of this precision is required for high-quality printer. And the printer can use the needle group than the normal needle bearing more packet groups, such increases for the wall – work required can be reduced naturally.
2. Roller bearings The use of needle roller bearings, printer manufacturers are still making trouble on the needs of high precision coat, and the need to install the experienced needle workers find the right group. To solve this problem, bearing manufacturers have developed integrated outer Flange The roller bearings supporting the program. Roller bearings can be preloaded to achieve good accuracy and rigidity. And can also use the inner ring with a taper to be adjusted bearing clearance work. Such solutions, printer roller bearings can achieve zero clearance requirements. And the outer ring with flange for the printer manufacturer to resolve the installation and lubrication problems. MAN Roland, Heidelberg, gaining more than Japan and China Northern's extensive use of the bearing model. The roller bearings supporting the program has become a printer in the roller support of the mainstream.
3. Integrated unit And automotive and other industries, the printer manufacturers also need the same precision as the bearing supplier to provide a more simple modular components to reduce the factory assembly error and time, reduce rework, so as to enhance efficiency and reduce costs. To meet this demand, the main roller bearing manufacturer to provide a more accurate support, installation, maintenance, support a more simple drum unit. If developed ring eccentric bearing bearing units. The bearing unit integrated bearings and eccentric, not only has the role of supporting rollers, roller clutch, and can realize the function register. Its advantages have been widely accepted by printer manufacturers. KBA, MAN Roland and Heidelberg's new models models, have been in the printing plate roller or rubber roller bearing units use this. In the old model of remodeling work, this ring has become the preferred bearing support. There is no in performance, installation, maintenance of the bearing unit better than this program. And its labyrinth seal and use of cylindrical roller, it can be lubricated, it can be greased, and maintenance-free life. Excellent bearing lubrication also makes this the longest life expectancy in various programs. It makes the printer manufacturer's requirements from its own precision machining, installation of the line moved to the production of products bearing bearings and other precision production line. This is also consistent with modern intensive industries.
Above the main drum support for the various types of printer solutions. Accuracy requirements of its own printer, on the rotation and linear motion parts have very high support needs. Above solution can solve the internal printer manufacturers to develop their product needs more features.
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