Printing presses in the process of use often appear a variety of problems, often damage the mechanical parts, electrical faults frequently appear, some people say that the machine is too old. Old machine is an objective reason, but the new machine is not a fault? Some printers have more trouble than old machines. Objectively speaking, the use of the machine and failure rate include the following factors: machine manufacturing quality, installation and commissioning, maintenance, reasonable operation, the most important is the quality of maintenance. The quality of the machine is factory, whether it is the new machine or the old machine, installed and commissioning is the first off.
General new machines in the factory are installed and debugged, after the quality inspection, and then through the body packaging transport. Not only the level and reasonable installation problem, there is also a check and calibration problem. The old machine should be more so, as for maintenance, use will not say, just want to talk about the quality of maintenance:
Maintenance is not a simple disassembly, not only to find the cause of the failure, but also to find the other problems that came with it.
The printing press has a strict time coordination relationship, and the assembly tolerance and adjustment values, the busy removal and excessive adjustment is the main cause of machine speed wear and failure.
Spare parts procurement and processing quality, not necessarily any parts and electrical components are to use the original accessories, the original parts of the cost of high procurement cycle length, unless special or critical parts, most parts of other parts and electrical components can be substituted, as long as the understanding of parts processing technology and components characteristics.
Circuit Fault In addition to the natural damage to the machine, mainly disassembly installation is not carefully derived from the hidden fault or did not find a circuit failure caused by the machine and human factors.
Failure treatment of Flume liquid
A discussion on the problem of water tank in the printing press the concentration of the appropriate water tank is based on the conductivity value, when the conductivity is too high, the ink will not be easy to dry, too low is easy version of dirt or ink. So we must try to find the appropriate conductivity value, when the concentration value is found, the total sink to multiply by the percentage is the first time to add the amount. In addition, when the conductivity value changes more than ±50~100, it needs to be modified before it can continue to use, but also to pay attention to the temperature in the tank, because the temperature will affect the conductivity of the measurement value.
The ideal printing water conditions are generally recommended as follows:
(1) Water quality should be softened;
(2) Conductivity value 700~1300 (must deduct water conductivity value);
(3) PH value 4.0 ~ 5.5;
(4) Trough temperature 5℃~15℃;
(5) The degree of emulsification is below 35%;
(6) Alcohol IPA ratio $number;
(7) Tank liquid concentration ratio 1.5%~2.5%.
The following is the result of the actual testing of the center in the printing lab:
Flume Liquid: Magic150.
Conductance meter: Deltaohmconductivitymeter model: HD8706.
Ph: Hannaphmeter model: HI8521.
According to the above example, the central printing laboratory presses the total water tank $number, 000cc*2%=1, 600cc flume liquid, the conductivity value remains at 1,000 (1,095-92.5) ±100, ph value is about 5.0. In addition, we found that the ph value in the tank liquid concentration after 3% no significant change, so it is not easy to detect whether the amount is appropriate, and there are some of the water tank in Europe to add more buffer, its function is to maintain a stable water tank acidity and reduce the layout of corrosion, but also in the use of ph value of the water tank concentration will cause problems.