Many advantages of the four-color offset press have been recognized by the majority of operators, but due to the increase in color sets and various auxiliary devices, higher requirements have been placed on the maintenance of the equipment. Taking Heidelberg's four-color sheetfed offset press as an example, there are hundreds of oil eyes, hundreds of small motors for adjustment, powder spraying device, infrared drying device, automatic cleaning roller device, dampening The maintenance work of the liquid mixing device is more complicated. It is not easy to do a good job of maintenance and give full play to the benefits of the equipment. The author has many years of experience in operating Heidelberg's four-color offset presses, and now summarizes a set of circular maintenance methods for peer reference.

specific methods

Under the premise of normal daily maintenance, according to the structural characteristics of the four color groups of the equipment, the content of monthly maintenance and half-year maintenance is decomposed into each week.

First, maintain a printing unit every week, including the following contents.

(1) For all ink rollers in this unit, focus on checking whether the rubber roller is calcified, whether the bearing is short of oil, and whether the pressure between the rollers should be adjusted.

(2) Clean the roller row of the unit, and add oil to the opening ball.

(3) Clean the drum cleaning device of the unit.

(4) Remove ink deposits accumulated in other parts of the unit.

Secondly, because the paper feeding part is easy to accumulate paper dust and the paper collecting part is easy to accumulate dust, it needs to be maintained every week. The method is to use a vacuum cleaner to remove the dust and add oil to the oil eye. In addition, the inspection of key parts (such as rotary gas valves, etc.) is essential.

Finally, the maintenance of peripheral equipment, including electrical cabinets, air pump combination cabinets, fountain solution mixing cabinets, air compressor cabinets, etc. One of the weekly maintenance items focuses on removing dust and cleaning the filter.

In such a month, the major parts of the machine can be maintained at least once. The machine is running normally for about half a year, and then arrange for 1 to 2 working days, add oil to all the oil rows of the teeth row, check whether the host machine needs to replace or replenish the engine oil, and check whether there is any missing maintenance content according to the maintenance manual.

In short, the maintenance of a four-color offset press can only be done if the above work is done carefully.

Main points of work

Maintenance can not be in the form, even if the content is listed more, after one or two actual operations, the personnel is reasonably divided and cooperated with tacit understanding, generally only 4 to 5 hours can be completed each time. There are two points that need special attention in the actual work: First, the movement specifications, the selection of various tools and cleaning agents should be appropriate, neither sharp tools can be used to scoop the rollers and rubber rollers, nor can the cleaning agent such as reducing agents and banana water be used. The paint layer of the roller or machine, and the maintenance of the electrical cabinet must be coordinated by electrical engineers; second, make detailed records, including the main parts of the maintenance, maintenance methods, the discovery of hidden dangers, maintenance plans, etc., which can prevent omissions and Can make each team learn from each other, learn from each other. Under special circumstances, work that cannot be completed this week will be scheduled in the maintenance schedule next week to ensure that the maintenance parts are implemented one by one.

actual effect

So far, all the offset presses of our company have been maintained by this method, and the equipment failure rate has shown a downward trend. This is mainly due to two aspects: one is that the method decomposes the maintenance content in detail, and implements it to the team, the division of labor to the team member, the responsibility is clear, and the maintenance experience of the operator is more and more abundant; The degree of wear of the damaged parts (such as the ink fountain roller transmission clutch, the bearings at both ends of the rotary air valve, the air pipe joints, nylon connectors, various paper filter elements, etc.), equipment supply department or processing, or purchase, spare parts in advance, reducing maintenance time , Reducing maintenance costs. Of course, the circulation maintenance method is also applicable to sheet-fed printing presses and rotary printing presses with more than four color groups, and has been promoted throughout the company with good results.

Gabion Net

Gabion Netting,Gabion Wire Mesh,Gabion Net,Wire Mesh For Rocks

Anping County Xinhai Traffic Wire Mesh Manufacture Co., Ltd , https://www.xhmetalfence.com