Screen printing equipment, the basic causes of nozzle clogging – screen printing, equipment – silk screen printing industry, especially
Screen printing equipment to plug the machine nozzle Why? Inkjet nozzle when the machine could not ink, resulting in lack of color picture elements, often called "plug nozzle" is the impact on picture quality and yield of the main factors. Of course, "block" is also a variety of reasons, to the following situations:
1, Ink Accumulated to a certain level in the nozzle out of the nozzle after the plug: the plug is the most common way, because the ink Solvent To evaporate into the air to make the picture dries, so the ink is a volatile liquid, volatile and in the air clarity out of solids. Inkjet nozzle to the fabric, the Association of residues in the surrounding part of the ink, this part of the ink dried in the air will gradually become smaller or even plug the nozzle orifice to live, but since it is the external orifice, is easy to clean, which is why we always cleaning nozzle reasons.
2, piezoelectric crystal damage: certainly not the ink jet nozzles, piezoelectric nozzle can be used in general about a year, in Inkjet Workload of many factories may also be less than one year is normal.
3, piezoelectric crystal fatigue damage: the phenomenon is sometimes inkjet nozzles, and sometimes not ink jet, especially in the large jet (ie jet dark screen) "plug" in clear, then the best is to replace a new nozzle.
4, spray nozzle within the filter block caused no ink: the use of sprinklers long time, especially in the printing task is not always at full shutdown of the plant, the ink does not flow in the nozzle in a long time, easily absorbed in the internal wall of the filter or ink Road, so the ink flow cross-sectional area smaller ink will not cause the phenomenon of the nozzle, and now a dedicated device can help you solve this problem the nozzle.
5, the ink viscosity is too high or too low: too high viscosity of the ink flow of the ink, poor exhaust nozzle per unit time amount of ink is not enough; ink viscosity is too low, that is too thin, easy to spray when the holes in the piezoelectric crystal Withdrawing inhaled air can not absorb ink, which erupted as the air; both of which can cause the phenomenon of ink nozzles no. This often requires the customer environment is very important to store ink, the ink should be placed before using the environment to use ink more than 24 hours as well as ink viscosity at low temperatures will be placed high, and high temperature viscosity becomes very low, this viscosity varies widely, if the viscosity of ink mixed with large differences in use, will cause no ink jet phenomenon
6, driver circuit fault: driving circuit Electronic The original device aging and too much dry ink savings dirt, may affect the voltage-driven nozzles, resulting in no ink or the ink nozzles fluctuating.
7, the types of ink: Some ink manufacturers control the amount of improper because the desiccant, dry fast, easy to cause the ink in the external plug, though you can clean, but more frequent cleaning intervals, once a long time not to use sprinklers When not in time to protect nozzles, when the next re-Inkjet Nozzle permanent damage may result.
8, frequent replacement of ink: ink replacement in many cases when there may not protect the nozzle, jet nozzle will also affect the state.
9, the machine using the ambient temperature and humidity: generally recommended temperature is 22 ~ 25 degrees, humidity 40 ~ 70%, high and low temperature viscosity of the ink, will produce the phenomenon of nozzle missing ink or paste the first phenomenon , is often mistaken for "nozzle blockage."
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