A common fault - gag
Main reasons: 1. The ink is not fully shaken prior to spraying, causing the pigment deposited on the bottom of the tank to clog the nozzle during spraying; 2. The ink is shaken too much before spraying, resulting in cracking and cracking of the stirrer (glass beads). Blocked nozzles; 3. No spray nozzles are inverted after one spray, resulting in nozzles remaining dry after the nozzles are blocked; 4. Inverted or sideways during storage, pigment deposits in the ink block the discharge hole of the valve; 5. Exceed shelf life The product, the system of resin or color filler back to block the valve discharge hole; 6 water-based inkjet system, solvent evaporation, etc.; 7. Inkjet is too thick; 8. Ink is not frost.
Preventive measures: 1. Shake the ink well before spraying; 2. Grasp the correct method of shaking to maintain and maintain the equipment. Avoid using too much force when shaking the ink. 3. Use after one spray and never use ink. 5 seconds, after clearing the ink from the nozzle, store it again to ensure normal use for the next time; 4. Take care not to invert or side the body during storage; 5. Use before use in the shelf life period; 6. Adjust the amount of solvent; Inkjet grinding is fine; 8. Add antifreeze.
Remedy: 1. After shaking the ink, invert the ink tank and spray for 1-5 seconds; 2. Open the blocked nozzle with gas; 3. Add 3H4 heat stabilizer; 4. Replace the nozzle; 6. Place on a hot water bath to melt and flow.
Second, the common failure - spray can not finish (spray pressure drop)
Main reasons: 1. Spraying phenomenon when spraying; 2. Over-tilting of the ink tank when spraying, the tilt angle exceeds 45°; 3. Automatic ink-jet storage time is too long for packaging logistics, exceeds the shelf life; 4. Bent pipe bending of the valve The direction is opposite to the nozzle hole.
Preventive measures: 1. Grasp the correct spraying technique and avoid inverting; 2. Avoid the ink tank tilt angle exceeding 45° when spraying; 3. Avoid using expired or misuse other ink jet products; 4. When spraying to the remaining 20% Left and right, when the concentration (or viscosity) of the discharged material is felt to be insufficient (while the ejected product is mainly propellant), the nozzle is rotated at an angle of 180°.
Remedy: 1. When the spray pressure is found to drop as much as possible once sprayed to finish using the ink; 2. When the spray pressure is insufficient and the temperature is low, 50 °C water can be used to heat the ink after the operation.
Third, common failures - ink jet viscosity is too low (ink thin, insufficient coverage)
Main reasons: 1. The ink is not fully shaken before spraying; 2. The tilt angle of the ink tank is too large during the spraying process to make the gas content in the ejected ink system high, and the ink is diluted; 3. The ambient temperature of the spraying field Low; 4. Spraying environment lack of heating and drying equipment, poor air circulation; 5. One-time spraying too thick (such as flash color).
Preventive measures: 1, correct control of spray technology, to avoid the inverted spray, oblique spray; 2, to avoid the rain, wet or cold weather inkjet.
Remedy: 1. Operate spray at room temperature or place the finished print in a 50-60°C warming unit.
Fourth, the common fault - flow hanging
Main reasons: 1. The nozzle is too close to the coated surface; 2. The nozzle movement speed is too slow 3. The spraying environment has poor ventilation; 4. The flashing time between colored layers is insufficient when spraying; 5. The surface is contaminated.
Preventive measures: 1. Use the correct spraying distance (15-25cm); 2. Keep the nozzle moving speed (30-60cm/s); 3. Keep the environment well ventilated; 4. Set the corresponding color layer flash time depending on the temperature level ( 3-10min); 5. Before inkjet, make sure that the coated surface is completely clean.
Remedy: 1. Lightly sag until the ink film is completely dried (fixed temperature 16h maturation period) After polishing with P1500 or more sandpaper after leveling and polishing or coating varnishes; 2. Serious flow hang until it is fully dry After the P800 or more sandpaper polished after the formation of heavy spray, spray length is usually extended.
V. Common Faults - Pinholes, Drops
Main reasons: 1. The ink is not mixed evenly; 2. The viscosity of the ink system is too high and there are air bubbles; 3. The finger is pressed by the nozzle and the force is uneven. The nozzle is out of ink and causes ink deposit; 4. The ink film is sprayed too thick or Too thin; 5. The surface of the printed material is contaminated.
Preventive measures: 1. Vibrate the ink vigorously before spraying to mix evenly; 2. Spray evenly; 3. Clean the coated surface thoroughly before spraying.
Remedy: 1. Slight air bubbles, ink droplets can be flashed and wiped with a clean cotton cloth to continue spraying; 2. Serious bubbles, ink droplets to be completely dry after the ink film polished with P800 sandpaper re-spray, can also be used alcohol water The mixed solvent is cleaned with a cotton wool and sprayed.
Six, common failures - orange peel
Main reasons: 1. The spray distance is too far or too close; 2. The ink atomization is uneven; 3. The spray is too thick or too thin.
Preventive measures: 1. Grasp the correct spraying technology; 2. Fully vibrate and shake the ink evenly or appropriately; 3. Use even force when the index finger presses the nozzle to ensure that the ink volume is even and constant.
Seven, common faults - whitening (matt)
Main reasons: 1. The spraying environment has high temperature and high humidity; 2. The spraying workshop is poorly ventilated or cold; 3. The solvent ratio in the ink system is poor.
Preventive measures: 1. Avoid rainy, high temperature and high humidity weather operations; 2. Use mixed solvents designed inkjet production.
Remedy: 1. Add 80 TNY white water or 0 solvent or alcohol ether solvent quickly in the whitening area; 2. Immediately add infrared lamp or electromagnetic wave baking (less than 60°C) when the whitening occurs; 3. Ink film After drying, it can be removed by waxing and polishing, or the re-spraying package design can be wiped with an alcohol-water mixed solvent. It can also be saved by adding X8 or trace 3114 to the ink.
Eight, common faults - wrinkling, Alice Qiaojiao
Main reasons: 1. The ink film layer is sprayed too thick; 2. The dry condition is poor (such as low temperature, high temperature weather, or excessive ventilation); 3. The spray environment air is polluted or the ventilation is poor; 4. The cross-linking agent in the ink system Excess or too little coloring material.
Preventive measures: 1. Avoid spraying thick ink film layer; 2. Ensure that the air in the inkjet environment is fresh and has normal temperature and humidity; 3. Control the specific surface area of ​​the coloring material and moderately reduce the cross-linking agent.
Remedy: 1. Slight wrinkles or slight warping must be done after the ink film is thoroughly polished or cleaned with alcohol water and then re-sprayed; 2. The need to re-wrinkle or re-warp the edge angle is thoroughly used alcohol After the water mixed solvent is cleaned and re-sprayed, color paste or 308 leveling agent may be added to the ink system to save it.
Main reasons: 1. The ink is not fully shaken prior to spraying, causing the pigment deposited on the bottom of the tank to clog the nozzle during spraying; 2. The ink is shaken too much before spraying, resulting in cracking and cracking of the stirrer (glass beads). Blocked nozzles; 3. No spray nozzles are inverted after one spray, resulting in nozzles remaining dry after the nozzles are blocked; 4. Inverted or sideways during storage, pigment deposits in the ink block the discharge hole of the valve; 5. Exceed shelf life The product, the system of resin or color filler back to block the valve discharge hole; 6 water-based inkjet system, solvent evaporation, etc.; 7. Inkjet is too thick; 8. Ink is not frost.
Preventive measures: 1. Shake the ink well before spraying; 2. Grasp the correct method of shaking to maintain and maintain the equipment. Avoid using too much force when shaking the ink. 3. Use after one spray and never use ink. 5 seconds, after clearing the ink from the nozzle, store it again to ensure normal use for the next time; 4. Take care not to invert or side the body during storage; 5. Use before use in the shelf life period; 6. Adjust the amount of solvent; Inkjet grinding is fine; 8. Add antifreeze.
Remedy: 1. After shaking the ink, invert the ink tank and spray for 1-5 seconds; 2. Open the blocked nozzle with gas; 3. Add 3H4 heat stabilizer; 4. Replace the nozzle; 6. Place on a hot water bath to melt and flow.
Second, the common failure - spray can not finish (spray pressure drop)
Main reasons: 1. Spraying phenomenon when spraying; 2. Over-tilting of the ink tank when spraying, the tilt angle exceeds 45°; 3. Automatic ink-jet storage time is too long for packaging logistics, exceeds the shelf life; 4. Bent pipe bending of the valve The direction is opposite to the nozzle hole.
Preventive measures: 1. Grasp the correct spraying technique and avoid inverting; 2. Avoid the ink tank tilt angle exceeding 45° when spraying; 3. Avoid using expired or misuse other ink jet products; 4. When spraying to the remaining 20% Left and right, when the concentration (or viscosity) of the discharged material is felt to be insufficient (while the ejected product is mainly propellant), the nozzle is rotated at an angle of 180°.
Remedy: 1. When the spray pressure is found to drop as much as possible once sprayed to finish using the ink; 2. When the spray pressure is insufficient and the temperature is low, 50 °C water can be used to heat the ink after the operation.
Third, common failures - ink jet viscosity is too low (ink thin, insufficient coverage)
Main reasons: 1. The ink is not fully shaken before spraying; 2. The tilt angle of the ink tank is too large during the spraying process to make the gas content in the ejected ink system high, and the ink is diluted; 3. The ambient temperature of the spraying field Low; 4. Spraying environment lack of heating and drying equipment, poor air circulation; 5. One-time spraying too thick (such as flash color).
Preventive measures: 1, correct control of spray technology, to avoid the inverted spray, oblique spray; 2, to avoid the rain, wet or cold weather inkjet.
Remedy: 1. Operate spray at room temperature or place the finished print in a 50-60°C warming unit.
Fourth, the common fault - flow hanging
Main reasons: 1. The nozzle is too close to the coated surface; 2. The nozzle movement speed is too slow 3. The spraying environment has poor ventilation; 4. The flashing time between colored layers is insufficient when spraying; 5. The surface is contaminated.
Preventive measures: 1. Use the correct spraying distance (15-25cm); 2. Keep the nozzle moving speed (30-60cm/s); 3. Keep the environment well ventilated; 4. Set the corresponding color layer flash time depending on the temperature level ( 3-10min); 5. Before inkjet, make sure that the coated surface is completely clean.
Remedy: 1. Lightly sag until the ink film is completely dried (fixed temperature 16h maturation period) After polishing with P1500 or more sandpaper after leveling and polishing or coating varnishes; 2. Serious flow hang until it is fully dry After the P800 or more sandpaper polished after the formation of heavy spray, spray length is usually extended.
V. Common Faults - Pinholes, Drops
Main reasons: 1. The ink is not mixed evenly; 2. The viscosity of the ink system is too high and there are air bubbles; 3. The finger is pressed by the nozzle and the force is uneven. The nozzle is out of ink and causes ink deposit; 4. The ink film is sprayed too thick or Too thin; 5. The surface of the printed material is contaminated.
Preventive measures: 1. Vibrate the ink vigorously before spraying to mix evenly; 2. Spray evenly; 3. Clean the coated surface thoroughly before spraying.
Remedy: 1. Slight air bubbles, ink droplets can be flashed and wiped with a clean cotton cloth to continue spraying; 2. Serious bubbles, ink droplets to be completely dry after the ink film polished with P800 sandpaper re-spray, can also be used alcohol water The mixed solvent is cleaned with a cotton wool and sprayed.
Six, common failures - orange peel
Main reasons: 1. The spray distance is too far or too close; 2. The ink atomization is uneven; 3. The spray is too thick or too thin.
Preventive measures: 1. Grasp the correct spraying technology; 2. Fully vibrate and shake the ink evenly or appropriately; 3. Use even force when the index finger presses the nozzle to ensure that the ink volume is even and constant.
Seven, common faults - whitening (matt)
Main reasons: 1. The spraying environment has high temperature and high humidity; 2. The spraying workshop is poorly ventilated or cold; 3. The solvent ratio in the ink system is poor.
Preventive measures: 1. Avoid rainy, high temperature and high humidity weather operations; 2. Use mixed solvents designed inkjet production.
Remedy: 1. Add 80 TNY white water or 0 solvent or alcohol ether solvent quickly in the whitening area; 2. Immediately add infrared lamp or electromagnetic wave baking (less than 60°C) when the whitening occurs; 3. Ink film After drying, it can be removed by waxing and polishing, or the re-spraying package design can be wiped with an alcohol-water mixed solvent. It can also be saved by adding X8 or trace 3114 to the ink.
Eight, common faults - wrinkling, Alice Qiaojiao
Main reasons: 1. The ink film layer is sprayed too thick; 2. The dry condition is poor (such as low temperature, high temperature weather, or excessive ventilation); 3. The spray environment air is polluted or the ventilation is poor; 4. The cross-linking agent in the ink system Excess or too little coloring material.
Preventive measures: 1. Avoid spraying thick ink film layer; 2. Ensure that the air in the inkjet environment is fresh and has normal temperature and humidity; 3. Control the specific surface area of ​​the coloring material and moderately reduce the cross-linking agent.
Remedy: 1. Slight wrinkles or slight warping must be done after the ink film is thoroughly polished or cleaned with alcohol water and then re-sprayed; 2. The need to re-wrinkle or re-warp the edge angle is thoroughly used alcohol After the water mixed solvent is cleaned and re-sprayed, color paste or 308 leveling agent may be added to the ink system to save it.
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