Offset printing machine factory is the core equipment, printing is one of the highest of all devices in equipment utilization. In order to ensure the normal operation of the offset press, it is necessary to carry out routine maintenance and maintenance. At the same time, the maintenance and maintenance of offset presses is also an important task in the management of printing equipment . In this article, the author combines his own practical work experience to talk about his own experience and feelings about the maintenance and maintenance of offset printing machines.
Tertiary maintenance
Generally, the maintenance and maintenance of the offset press mainly includes primary maintenance, secondary maintenance and tertiary maintenance.
1. Level 1 maintenance
The first-level maintenance, that is, the daily maintenance, is the maintenance performed by the offset machine operator every day, and the operator must be required for each shift.
Check and lubricate the equipment before the shift, strictly enforce the operating procedures in the class, carefully clean and test the equipment after the shift, and record the operation status of the equipment on the handover shift. The first-level maintenance is the basis for the maintenance and maintenance of the offset printing machine. It is a regular work in the operation and has the same important meaning as the completion of the production task.
2. Secondary maintenance
The secondary maintenance is mainly based on the offset printing machine operator and the maintenance personnel, and the maintenance work is carefully carried out according to the requirements of the secondary maintenance rules. Secondary maintenance is a planned maintenance work that requires local and key parts to be disassembled and inspected as planned, including oil passages, cleaning and replacing oil filters, checking for wear, and maintenance of electrical parts. Records should be made after secondary maintenance is completed, and close attention is paid to unresolved issues.
3. Three-level maintenance
The third-level maintenance is mainly based on the maintenance personnel of the offset printing machine, supplemented by the operator. The maintenance work of the equipment is carefully carried out according to the requirements of the third-level maintenance. In addition to the three-level maintenance content, the contents must be electrically repaired and replaced with worn parts. Change oil for mechanical parts, refuel for motors, etc. After the third-level maintenance is completed, the maintenance personnel should fill in the records in detail and submit them to the workshop for acceptance. The inspection and acceptance documents should be submitted to the equipment department for filing. The main purpose of the three-level maintenance is to make the equipment meet the standard, improve and consolidate the equipment integrity and extend the service life.
Refine level 1 maintenance
For the first-level maintenance, the author believes that it is necessary to refine the content, especially for multi-color offset printing machines, such as the Manroland 707LV+UV offset printing machine of our company, the length of the equipment is long, and the links and contents that need maintenance are more, Its comprehensive daily insurance takes a long time and is not conducive to production. Based on the 12-hour work system of two shifts per day implemented by our company, the author has developed a detailed first-level maintenance plan. In principle, one week is a cycle. The specific contents are summarized as follows. If you are not appropriate, please ask your colleagues to correct and correct.
Paper feeding mechanism
The principle of daily insurance: once a week, every day white maintenance.
The maintenance contents are as follows.
(1) Lubricate the paper feed suction linear guide with grease first, and check the linear bearings and guide rails for wear.
(2) Add oil to the central bearing of the swing paper stop at the front end of the paper feeding, because paper powder and paper wool are very likely to cause dry friction of the swing paper stopper due to lack of oil.
(3) Clean the paperboard, front gauge, paper dust and dirt at the side gauge; clean the front gauge electric eye, side gauge electric eye, over-head detection electric eye and ultrasonic double-eye electric eye with a soft cloth; one oil hole of the side surface AB surface Add oil lubrication.
(4) Clean the swaying tooth transfer roller and the dental shaft. Swinging teeth open bearing, paper roller open bearing and grease lubrication.
2. Printing unit
The principle of daily insurance: the first shift to the first group of 4 to 4, the night shift to the fifth to eighth group. Every Monday, the first group of the day shift, the fifth group of the night shift, the second group of the white shift on Tuesday, the sixth group of the night shift, and so on, carry out maintenance.
The maintenance contents are as follows.
(1) The maintenance of the impression cylinder includes two aspects: one is to clean the roller surface of the impression cylinder, and it is not allowed to use strong acidic solvent (such as cleaning solution, wetting powder, rubber reducing agent, etc.) and ink cleaning agent, including Chlorine cleaning agent, etc.; the second is to clean the grease and dirt on the crepe shaft, check the crepe paper for deformation, grease the crepe tooth opener bearing, and apply the squeegee opening and closing dent. Appropriate chain oil lubrication.
(2) Clean the blanket cylinder and the exposed parts of the roller and the roller, and check whether the blanket is damaged or not.
(3) Clean the plate cylinder and the roller, the plate holder, and the dirt on both sides of the wall.
(4) Check the ink roller and water roller. If there is calcium in time, check whether the bearing at both ends of the rubber roller is damaged. If the damage is replaced in time or the next group is explained, notify the maintenance personnel to deal with it in time to avoid causing the bearing seat or bearing. Excessive wear or shedding of the sleeve.
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