The importance and necessity of the maintenance of the printing equipment
Author： Shenzhen HappyField Packaging Machinery Manufacturing Co., Ltd.Publication time：2018-06-04 08:52:42Views：2615【SLM】
A large number of printing presses have been introduced in the printing industry in China.These presses have the characteristics of high automation, fast printing speed and good product quality.Howeve...
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A large number of printing presses have been introduced in the printing industry in China.These presses have the characteristics of high automation, fast printing speed and good product quality.However, with the increase of service life, the wear and damage degree of equipment is also progresses. In addition to natural wear, some parts are accelerated wear and damage caused by the poor operation of the equipment.If the normal maintenance and maintenance of the printing machine can not be carried out normally, the technical function of the equipment will be reduced, thereby reducing the printing quality.To ensure that the equipment is finished, the printing quality is not slipped, the production is carried out smoothly, and the loss caused by improper maintenance is reduced. All these further illustrate how important the maintenance of the printing equipment is.
The following points fully explain the importance and necessity of equipment maintenance：
1、oil-way
On the oil circuit, the lubrication of production equipment is an important component of equipment maintenance.Keeping the oil passage of printing presses unimpeded is related to the lubrication of the moving parts of the whole machine.It is necessary to replace the oil and cleaning oil on time by way of filtering device, so that the oil flowing into the pipeline does not contain impurities, so as to avoid the blockage of the oil section of the Department.In particular, the needle roller bearing of the support roller of the unit, if there is no lubricating and cooling of the oil, the bearing and the roller shaft will be frictional for a long time. When the anomaly is found, the shaft and the inner ring of the bearing have been glued.Generally need to replace the inner ring; serious roller shaft serious damage.
2、Considering the machinery itself
From the mechanical point of view, only the equipment manipulate the staff to strengthen the maintenance, keep the machine's mechanical flow parts clean and lubricated and operate flexibly, in order to fully apply the technical function of the equipment, so as to keep the equipment in good condition. People who have used the printing machine in Heidelberg know that the ink roller and the bearing seat of the water roller and the pressure regulating worm seat are easily worn out in Heidelberg polychromatic printing machine. The ink is especially easily accumulated on the bearing seat, the landing gear and the worm seat, especially the machine for printing gold and silver ink, if it can not be cleaned in time, the time is long, the metal particles are long. It will accelerate the wear of the bearing seat or the worm seat. Generally, it takes several hours to remove the worn roller bearing seat from the machine wall for several hours. As the bearing seat is fixed on the landing gear with a shaft ring, the space is very small, only a few centimeters of loose position can be found. The two holes in the ring can be found by the reflector and the bearing seat and its landing are reinstalled and the landing gear is reinstalled. Institutions are also time-consuming. The same is the case for the dismantling of the water roll seat. Different polychromatic offset printing machines, the pressure regulating worm seat installation is different: one is fixed seat fixed bolt is fixed from the outside of the wall fixed lock (more easily installed); the other is the fixed bolt is locked outward from the machine wall (most of the use of this mode), space position is narrow, assembly and maintenance problems. If the desk clerk understands this, usually maintain, keep clean, clean the printing ink on the machine in time, you don't have to change the bearing seat and the worm seat frequently. This can not only reduce downtime, improve production efficiency, but also save spare parts replacement cost.
In order to prevent printing products from getting dirty, the offset presses usually use dusting. If the amount of powder is too large and can not be cleaned in time, it will also cause some failures, such as the failure of the automatic lifting device of the paper collection and the damage of the mechanism of the deceleration of the paper. It is worth mentioning the suction gear wheel of the Heidelberg offset machine. If the pulpowder near the wheel and the suction speed zone can't be removed in time, the powder and oil are mixed to form the oil sludge, and the oil sludge will stick to the suction and deceleration wheel so that it can not roll. In order to protect the motor which drives the decelerating axle rolling, the gears in the decelerating mechanism are forced to peel or sweep teeth. The motor is also related to the circuit of the moistening system. Once the fault occurs, the whole machine will stop. To eliminate the trouble, we need to install a new gear. Therefore, usually to clean these institutions, otherwise, the machine can only print thickness - play the role of supporting, if the printing thin paper, because the suction wheel does not play a role, it will cause the paper collecting mechanism, and reduce production efficiency.
3、Electrical aspects
Heidelberg offset presses are equipped with a lot of safety devices, and are very agile. As long as they touch slightly, the whole machine will stop running. Sometimes there are too many dust accumulation in the internal contact points of the electrical control box of the machine, resulting in poor contact between the relay contacts and the inability of the machine to operate.
There are many other similar problems, such as the excessive accumulation of Madane dust in the movement and reduction of the image carbon brush frame, and the pressure of the spring on carbon brush on the carbon brush frame, so that the contact between the carbon brush and the copper head is bad, and the machine operation will be difficult.
4、Gas circuit
The four color and five color offset printing machines produced by Heidelberg in the late 80s were all used to control the clutch pressure, the ink roll, the offset plate of the water roll and the ink transfer ink transfer. Each unit of the polychromatic printing machine has several two five - way control valves to control these movements. The movement of the ink roller, the water roll off plate and the ink transfer roller can be realized by controlling the cylinder piston movement through the control valve. Sometimes, because there is water in the control valve or cylinder to cause the valve seal damage, resulting in the leakage of the control valve or cylinder, making the ink roll and water roll out of the plate is not good. In addition, because of the accumulation of ink in the action control mechanism, the movement of these mobile components is not flexible, but the burden of the control valve and the cylinder can be aggravated, which causes the control valve to be sealed easily, and the cylinder piston is more easily deformed. In addition, because the gas hose is aging and the pipeline leaks, the pressure of the pipeline decreases rapidly, so that the control valve can not be opened, and the clutch pressure action can not be completed. If the pressure will increase the life of the compressor and accelerate the aging of the rubber tube, the problem of the failure of the landing gear is solved by the change of the valve or the pressure of the cylinder, which is not thorough.
All these problems are caused by poor maintenance, so it is important to strengthen maintenance and maintain daily, weekly and monthly maintenance. It can not only prolong the service life of the printing machine, but also improve the efficiency of production.
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