Thirty factor explanations that easily cause plate equipment failure
We are a big printing company in Shenzhen China . We offer all book publications, hardcover book printing, papercover book printing, hardcover notebook, sprial book printing, saddle stiching book printing, booklet printing,packaging box, calendars, all kinds of PVC, product brochures, notes, Children's book, stickers, all kinds of special paper color printing products, game cardand so on.
For more information please visit
http://www.joyful-printing.com. ENG only
http://www.joyful-printing.net
http://www.joyful-printing.org
email: info@joyful-printing.net
Pre-press plate-making equipment has a high proportion of faults due to external factors. The reasons are multi-faceted, and the solution must be determined according to the actual situation. In the maintenance process, the author summarizes 30 factors that easily cause the failure of the plate making equipment. These factors are inextricably linked with the equipment failure. Of course, there may be some other important factors that may not be included, but careful analysis of these factors will ensure The normal operation of the equipment and the rapid release of the fault, as follows:
1.Dust: Plate-making equipment, especially the later electric parts and photo-distribution equipment, is a precision equipment. Dust is the biggest natural enemy for such machines. Dust can cause great damage to equipment, so in daily maintenance, cleaning is the most important. .
2.Oil stains: Due to the influence of precision mechanical friction, almost all equipments use different types of lubricants. In the long-term lubrication process, affected by the temperature, dust and the powder generated by the friction, the lubricating oil is very likely to form oil stains directly causing mechanical resistance and local temperature rise, which is also an important factor in causing mechanical failure of the equipment.
3. Contamination: Contaminated items include two aspects, one is oil pollution, and the other is contamination caused by the combination of airborne debris or accumulated debris and water during operation of the equipment. Initial contamination will generally not have a major impact on the equipment, but long-term accumulation can easily cause damage to the equipment, such as dirty spots on the display.
4. Adhesive of raw materials: The adhesion of raw materials is more serious in terms of developing machine and proofing machine. It is formed by chemical reaction between the surface material of the film and the developing solution during the developing process, and it is easy to adhere between the rubber rollers. If the proofing ink is easily adhered to the ink roller and the rubber roller if it is improperly cleaned, it is a good way to solve the problem of the adhesion of the raw material by maintaining frequent cleaning.
5.Wear: Most of the wear occurs in areas where the machine is constantly moving, such as various types of plate-making equipment bearings and moving screw clamps. The most effective way to reduce wear is to refuel.
6.Vibration: Vibration not only causes the failure of the equipment itself, but also causes problems in the quality of the product. After effectively ensuring that the equipment is installed correctly, it is also necessary to regularly check its stability and level.
7.Looseness: Most of the causes of looseness are caused by external causes, such as vibration of equipment, etc. During the routine maintenance, care should be taken to check the tightness and fixation of each screw.
8.Leakage: refers to the inside of the fittings of the prepress equipment due to aging or impact, causing leakage of the protective liquid, causing the temperature of the component to rise and burn out, such as SCREEN Circulating cooling water in the P-641-FW copy machine lamp.
9.Corrosion: Most of the volatile liquids have different degrees of damage to non-metallic equipment. Substances that adhere to the surface of the equipment and are not removed in time are the main causes of corrosion.
10.Creep: The process of creep is generally not easy to express, because creep can be expressed both mechanically and electronically, so small changes in equipment parameters should be noted during the inspection of the equipment.
11.Stress Deformation: Stress deformation is a physical phenomenon that occurs more often in working equipment. After the work is completed, the equipment can not be adjusted in time is an important factor affecting the deformation of equipment machinery and circuit board slots.
12.Scratches: The running equipment is scratched by external objects, which can directly cause major failures of the equipment and may also affect the quality of the product, such as the scratch of the drum of the electric extension.
13.Crack: The main cause of cracking is the long-term stress or gravity of the equipment. Once cracks occur, do not usually repair them to prevent secondary cracks from damaging the equipment.
14.Fever: After the electronic equipment is energized, there is generally a phenomenon of heat generation, and there is also a phenomenon of heat after metal mechanical friction. The heating of the electrons requires an auxiliary heat sink, while the metal machine relies on its own heat conduction to reduce heat dissipation. In the daily equipment testing, you need to pay attention to the degree of heat generated by the equipment.
15.Abnormal sound: When the mechanical equipment is in operation, it is affected by many factors such as heat and wear, and it is necessary to stop the maintenance in time, otherwise it will easily expand the fault.
16.Short circuit: Short circuit is often accompanied by damage of other components, and the short circuit itself is caused by component aging, human error, etc. After a short circuit occurs, do not immediately power on. If you need to carefully check the cause of such fault, then conduct the power test.
17.Poor insulation: The aging of the equipment and the heat during operation can cause the insulation performance of the insulator to decrease. Poor insulation can short the device. Be sure to make the tolerance as large as possible when controlling and replacing components or wiring.
18.Conduction barrier: It is a phenomenon in which the component or electronic switch, relay and other components are in the working process, and the current is not affected by the action of voltage, current and contact resistance. Conduction barriers can generally be tested after powering up.
19.Resistance change: The resistance of a conductor changes with temperature, but it cannot return to the resistance at normal temperature after change. We call it resistance change. In addition to the influence of its own material, the change in resistance has a large relationship with the current passed. When repairing, pay attention to replace the same components or conductors with the original resistance.
20.Capacitance change: The change of capacitance has a great relationship with the manufacturing process. Pay attention to the working voltage of the capacitor, and the long-term overvoltage operation can easily change the value of the capacitor.
21.Fatigue: There should be some rest time for the work of the equipment. Long-term uninterrupted work, fatigue occurs in every aspect of the equipment, and many faults are directly related to fatigue. Although many devices are marked for long-term work, if you can rest for 1-2 hours a day, the operation will be more stable.
22.Corrosion: Corrosion is the same as corrosion, but the material is not the same. Corrosion has a great relationship with metal objects. The obvious characteristic of rust is that the surface of the metal field produces rust and affects the work of the equipment. There are also many equipments that are rusted in the active place due to lack of necessary oil protection.
23.Loss: The process of losing equipment performance and parameters during work is called churn. The loss is manifested in the overload operation of the equipment, and the problem of loss is also related to the electrical performance design of the equipment.
24.Poor lubrication: lack of oil or excessive local oil temperature is a feature of poor lubrication. Poor lubrication causes direct mechanical friction between the mechanical metal to cause mechanical failure of the equipment, and the result will be wear.
25.Improper cooling: The heat dissipation of electronic equipment needs to determine its heat sink according to the degree of heat generation. When the electronic device needs to be cooled locally and the outside temperature is high, it is very easy to cause improper cooling.
26.Hardening: Hardening is the chemical reaction of a substance after it has been exposed to high temperatures. There is also the accumulation of hardened matter between oil and dust.
27. Softening: In contrast to hardening, softening is a phenomenon in which the strength of a component or device body is weaker than normal after the device is subjected to vibration or high temperature.
28.Charring: A phenomenon that is easily generated when a component is short-circuited or partially overheated. For example, the lamp temperature of the electric extension is too high, and the optical fiber around the charcoal is high.
29.Electrical parameter drift: When the external voltage is baked to the main board, there is a large fluctuation, so that the parameters of the component during operation change with the large fluctuation of the voltage. This phenomenon will cause the fixed working point of the component to drift and form. Electrical parameter drift phenomenon.
30.Deterioration: Due to its own quality problems or the impact of current, the performance of the component changes greatly and cannot work. It is called deterioration. We must accurately measure the components when repairing, in case the deteriorated components cause secondary faults in the circuit.
The above 30 factors for the failure of the plate making equipment are briefly explained. Among most of these factors, the device showed early symptoms and was able to be discovered in time. In actual production, as long as full participation can be involved, many failures can be prevented and eliminated in time.