The UV curing equipment used in the printing industry is now divided into the independent machine and the printing linkage machine. Independent machine is a separate operation, since it has no effect on the operation of the printing machine, generally used for docking with the printing press, there is an independent operating system, but the processing speed is relatively slow.
The printing machine is the integration and linkage of printing machine, the UV lamps fitted to the color printing machine or group delivery, linkage machine can exactly match the printing speed, and stability of printing quality is also greatly improved. In terms of efficiency, the process is more economical. But regardless of the independent or linkage UV curing machine, their principles and basic structure are the same. For the UV equipment [1] can be divided into three parts: part of the UV lamps; exhaust air or water cooling system; electrical control system. In the use of these three parts have certain methods and requirements.
UV lamp parts
The first time using UV curing machine, UV light box inside the UV lamp is fragile. The first installation should pay attention to several points: before installation to use alcohol to clean the lamp tube, and then put on a clean gloves to hold the lamp. Install the lamp tube hole with a cloth pad will be inserted into the lamp, do not let the lamp hit the metal end plate. After installing a lamp, lamp holder for hand hold in place a few look under the lamp is free. Let the two ends of the jump, to prevent the occurrence of the phenomenon of crack expansion. If the sweat or dirt on the hand stick on the lamp tube through the lamp after high temperature carbonization, it will be sintered on the quartz glass crystal, which will directly affect the curing effect, shorten the lamp life. After the lamp tube has a black or black belt, the light intensity of the UV from the band will be attenuated. The utility model has the advantages that the curing effect can be changed, and the lamp tube can be transferred out of an angle, and the transparent part can be used for further use, so that the service life of the UV lamp tube can be increased, and the cost can be reduced.
The lamp after use in a dry or a floating workshop will often use alcohol wipe. The UV lamp reflector (the shade) is also very important, the general reflector surface according to the optical level, the use of dirt will stick to make rough surface, reducing the reflection efficiency, so it should wipe the lamp in the maintenance management system of the reflection cover should be cleaned. After a period of time, such as the reflector has been unable to clean up, if the active lamp reflector, it is necessary to replace. Some shade reflector is in the shade of the internal surface polishing machine can not be replaced, it must be removed and re oxidized, or even replaced, otherwise it will seriously affect the curing effect. Some lamps in the use of a period of time after the two ends of the black phenomenon and difficult to start, and even can not be lit, even if not to the service life, should also be replaced immediately, which is generally the quality of the lamp.
The general linkage with the printing machine UV curing equipment lampshade are shutter, which is in the printing machine stamping and downtime can be opened and closed in the shade, avoid printing machine UV thermal shine directly or on paper in the printing machine, printing machine and the damage caused by fire occurrence. Therefore, in the case of the shutter shade of UV curing equipment lighting should be checked before the shutter shutter, check whether the shutter shutter is working properly.
Shutter driving UV curing machine (electric motor) and pneumatic (cylinder) two, pneumatic shutter relative to the electric failure rate is less, can be convenient for manual testing and quickly determine the fault point. When the power supply is not connected, the manual button of the electromagnetic valve of the cylinder can be manually controlled, and the shutter shutter can be opened and closed several times by hand. In case of failure to open before the UV lights. Electric shutter to some trouble, first of all, must be on the power, which has a certain security risks, and then turn on the shutter to turn on the electric motor. Also repeatedly to make the shutter shutter work several times, the hidden danger in the normal work.
Exhaust and water circulation cooling system
Because the UV lamp is a high temperature and high temperature luminous body, the printing plant fire prevention is an important issue, the temperature is also very hot. So it is necessary to exhaust air cooling or water cooling for UV lamp. If the UV lamp cooling is not timely, the temperature in the lamp box continues to rise, not timely treatment, then the light will burn the lamp, heavy will make electrical short circuit, wounding or fire.
First of all, the wind cooling, UV light box is used to absorb the heat from the light box. But can not be used, because the cold wind to the UV wall will make the lamp mercury or metal condensation caused by arc quenching. Fan to air suction pipe length at the factory UV light box, will be appropriate at the time of installation, it is best not to have turned the corner, but can not have 90 degrees below the detours, this would be caused by wind box temperature rise can be exhausting to reduce the pressure of tens of percent, with the result that the fan speed is reduced, the heat accumulation box burning lamps, even as output power is not enough, the fan burn. Fan exports also have certain requirements. If the outlet is not directly to the atmosphere (indoor or outdoor atmosphere), but in another exhaust pipe, the exhaust pipe total requirements should be greater than the total air volume of the fan or the exhaust pipe not only plays a role but play a role in blocking the exhaust air, the heat did not break out. So after the installation of the wind is generally not free to change.
Although the water cooling than the wind cooling safety is better, but not the wind cooling that is not restricted by space. The components of the water cooling system are much cooler than the wind, and the cost will increase. The corresponding fault points. The temperature of the water temperature is best controlled at about 15 degrees, the water flow should be moderate, not too big. Also often observe whether the water leakage, water seepage point, the refrigerator is normal start, stop, there is no normal sound and water pump working condition. Abnormal should be found in a timely manner, otherwise it will make the UV lighting problems. But these problems in the control function can also be added control, such as: lamp temperature controller, water flow switch, water level switch and other components, can effectively help us find fault in the work.
Electrical control system
UV equipment electrical control system in which the electronic control cabinet is the headquarters of the whole set of equipment, transformers, capacitors, etc. are essential components. The UV lamp settings function switch are mostly in the cabinet, so the maintenance and use of the cabinet is also very critical.
First of all to the cabinet in a clean, dust-free places, temperature and humidity should be moderate, there must be enough space cooling and maintenance.
UV light emitting principle is a gas discharge, gas lamps in the start-up and maintenance of the need for high voltage. UV lamp power is less than 1 kwh, are matched by the ballast to trigger the lighting work. When the UV lamp power is greater than 2 kW, the higher the voltage required for the work of the UV lamp, it is more than 1000 volts. Don't open the door of the cabinet, to have a good grounding. The cabinet to UV light box is provided with a high voltage connection, wiring to floating away from the crowds or go underground to solid cover, to prevent the risk of leakage or short term stampede occurred. The high-voltage wire in the lamp box should be checked regularly to see if there is any hidden danger.
Because of the short circuit of high voltage line, it not only has harm to people, but also can make the capacitor breakdown, and even cause the transformer to burn down. The maintenance of light boxes and high voltage lines must also cut off the power supply to prevent accidents. In the use of UV curing equipment as often as possible not to switch UV lights, temporary shutdown with half power mode. So for the lamp, transformer, thermostat, water temperature and stop time in the debugging as far as possible not to change, it is best to have someone responsible for the continuity of the machine and the best performance is guaranteed.
XIAMEN QIAOCHENG PHOTOVOLTAIC TECHNOLOGY CO.,LTD
语言