For many years, the captain talked about the four-color offset printing machine cycle maintenance method
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The superiority of the four-color offset press has been recognized by the majority of operators, but due to the increase in color sets and various auxiliary devices, higher requirements are placed on the maintenance of the equipment. Take Heidelberg four-color sheetfed offset press as an example, there are hundreds of oil eyes, and there are hundreds of small motors for adjustment, as well as dusting device, infrared drying device, automatic cleaning roller device, dampening Liquid mixing devices, etc., the maintenance work is more complicated. How to do a good job of maintenance work and give full play to the benefits of equipment is not easy. The author has many years of experience in operating Heidelberg four-color offset press, and now summarizes a set of cycle maintenance method for peer reference.
Specific methods
Under the premise of normal day maintenance, according to the structural characteristics of the four color groups of the equipment, the contents of monthly maintenance and half-year maintenance are decomposed into each week.
First, maintain a printing unit every week, including the following.
(1) All the ink rollers of the unit, it is important to check whether the rubber roller has calcification, whether the bearing is short of oil, and whether the pressure between the rollers is to be adjusted.
(2) Clean the roller row of the unit and refuel the open ball.
(3) Clean the drum cleaning unit of the unit.
(4) Remove the dirt accumulated in other parts of the unit.
Secondly, since the paper feeding portion is easy to accumulate paper dust, the delivery portion is easy to accumulate dust, and maintenance is required every week. The method is to vacuum the dust to add oil to the oil eye. In addition, inspection of key parts (such as rotary air valves, etc.) is essential.
Finally, peripheral equipment, including electrical cabinets, air pump cabinets, fountain solution mixing cabinets, air compressor cabinets, etc. One of them is maintained every week, with the focus on removing dust and cleaning the filter.
In this month, all major parts of the machine can be maintained at least once. The machine runs normally for about half a year, and then arranges for 1 to 2 working days. Add oil to the oil eye of all the teeth. Check whether the main machine needs to be replaced or replenished with oil. Check the maintenance manual for any maintenance contents.
In short, only by doing the above work seriously, can we maintain the maintenance of a four-color offset press.
Work points
Maintenance can not be in the form, even if the content is listed in more than one, after one or two actual operations, the personnel are reasonably divided and cooperated, usually only 4 to 5 hours can be completed each time. In the actual work, there are two points to pay special attention to: First, the action specification, the selection of various tools and detergents should be appropriate, neither the sharp tool can be used to shovel the roller, the rubber roller, or the cleaning agent such as reducing agent or banana water can be used. Roller or machine paint layer, maintenance electrical cabinet must have the cooperation of electrical engineers; Second, do a detailed record, including the main parts of maintenance, maintenance methods, hidden dangers, maintenance programs, etc., so as to prevent omissions, It will enable the teams to learn from each other and learn from each other. Under special circumstances, work that cannot be completed this week will be pre-arranged in the maintenance schedule next week to ensure that the parts of the maintenance are implemented one by one.
Actual effect
This is mainly due to two aspects: First, the method decomposes the maintenance contents in detail, implements them into the team, divides the work to the team members, and has clear responsibilities. At the same time, the maintenance experience of the operators is also more and more abundant. Second, in maintenance, it is easy to grasp in time. Wear level of damaged parts (such as ink roller drive clutch, rotary gas valve bearings, air pipe joints, nylon connectors, various paper filters, etc.), equipment supply department or processing, or purchase, spare parts in advance, reducing maintenance time , reducing maintenance costs. Of course, the cycle maintenance method is also applicable to sheet-fed printing presses and rotary printing presses of four color groups or more, and has been promoted throughout the company with good results.