Common faults and elimination of printing machine ink system
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1. The ink roller has scratches
(1) The top ink screw is screwed too tightly, and the top ink screw comes out of the ink blade against the ink discharge roller. (2) Foreign objects or burrs on the edge of the front edge of the ink blade scratch the outer circle of the ink roller, and remove or repair foreign objects and burrs on the edge.
2. The ink fountain roller does not rotate
(1) The ink roller shaft ratchet positioning pin becomes loose, the pawl cannot drive the shaft to rotate; (2) the pawl swing rod is broken or damaged, the pawl cannot be driven to swing, and the pawl swing lever should be replaced; (3) the pawl head Fracture, can not get stuck in the ratchet; (4) Both ends of the ink discharge roller are stuck, check both ends of the ink discharge roller and repair.
3. Uneven ink supply
(1) The gap between the ink discharge roller and the ink blade is not evenly adjusted, and the gap between the ink discharge roller and the ink blade should be corrected; (2) The braking force of the brake roller on the transmission surface of the ink discharge roller is too small, and the pressure of the brake spring of the transmission roller of the ink discharge roller is adjusted; (3) The outer circle deformation of the transfer roller and the contact of the ink discharge roller are not uniform, the transfer roller should be replaced; (4) the contact pressure between the transfer roller and the ink discharge roller is improperly adjusted, and the contact pressure between the transfer roller and the discharge roller can be readjusted. .
4. The ink roller cannot be closed
The ink discharge roller pawl control flap is not properly positioned or worn, and the position can be adjusted or the flap replaced.
5. Ink/water can't stop
(1) The ink transfer lever is stuck, cannot rebound, should check and repair the collision block; (2) The circuit of the ink transfer component is faulty, check and repair the circuit; (3) The ink transfer electromagnetic block is faulty, and the inspection is removed. Make it work properly.
6. Uniform ink
(1) If the surface of the roller is worn out due to aging of the roller or poor ink quality, the roller should be replaced; (2) If the pressure between the rollers is improperly adjusted or deformed, the pressure should be adjusted or the roller should be replaced.
7. The printing plate is inconsistent
(1) Poor ink leveling; (2) The pressure of the ink roller and the ink roller and the plate cylinder should be re-adjusted by the improper pressure; (3) The bearing of the ink roller should be damaged, and the damaged bearing should be detected and replaced; 4) The water on the printing plate is uneven, check the water rubber roller part to make the water on the printing plate even; (5) the ink is not uniform, adjust the ink discharging part; (6) the ink transfer is uneven, check the ink transfer roller, string The contact pressure between the ink roller and the ink discharge roller is checked for deformation wear or aging of the ink transfer roller.
8. The print is deep before the light or before the light and deep
(1) The contact force between the inking roller and the printing plate and the ink roller is not correct, and the contact force is adjusted; (2) replacing the blanket or the lining; (3) the thickness of the printing plate is uneven, the flatness is poor, and the qualified printing plate is replaced; (4) The roller bearing wears, the deviation value is large, check and replace the bearing; (5) the reversing position of the squeezing roller is not correct, generally the reversing is performed when the roller enters the neutral position; (6) the ink roller bearing is damaged, replace it Bearing; (7) Ink adjustment adjustment, insufficient or excessive ink supply, readjust the ink supply system; (8) Improper ink mixing, high viscosity, re-adjust ink characteristics.
9. Paste
(1) Insufficient water supply to the water bucket, adjust the water bucket and water volume; (2) The angle of the ink discharge roller is small, and the water roller should be adjusted; (3) The pressure of the water transfer roller or the water supply roller and the water discharge roller or the water roller Discomfort, re-adjustment; (4) The water on the surface of the water transfer roller or the plated water roller fluff is thicker, affecting the water transfer, and the water velvet cover should be replaced again; (5) The water transfer is not acted due to the circuit problem, and the circuit is inspected and repaired; (6) The surface of the water roller has dirt affecting the water transfer performance, cleaning the water roller; (7) the plate is damaged, the plate is replaced; (8) the ink is unbalanced, the ink is small, and the amount of ink is adjusted.
10. Floral failure
(1) The water is large, the ink is not balanced, and the ink and water balance is adjusted; (2) the printing pressure is not suitable, the printing pressure is corrected; (3) the ink characteristics are not good, and the ink is re-adjusted; (4) the ink is emulsified seriously, and the ink is replaced; (5) Too much water is accumulated on the water-rolled velvet cloth, and the water is removed properly; (6) the water roller and the ink roller and the plate pressure are improperly adjusted, and the contact force is re-adjusted; (7) the printing plate is not dried. Ok, change the plate.
11. Printed goods appear on the ink bar
(1) The transmission gear of the ink mixing system is not working smoothly, and the unqualified transmission gear is replaced; (2) the shaft head or bushing of the ink roller is worn, and the shaft head of the ink roller or the worn bushing is replaced; (3) the inking roller swing frame It is too loose or worn with the bushing nut of the squeezing roller to replace the damaged parts; (4) the contact pressure between the inking roller and the squeezing roller and the plate cylinder is not suitable, and the pressure is adjusted; (5) the bearing of the inking roller is damaged or the rubber roller is deformed. (6) improperly adjusted printing pressure causes the ink bar to re-adjust the printing pressure; (7) the pad hardness is not suitable, the pad is replaced; (8) the ink bar is caused by the axial movement of the plate roller, and the string is eliminated. (9) The hardness of the plate roller is not suitable, too hard or too soft, using a suitable hardness of the ink roller (30 degrees Shore); (10) the roller drive gear is damaged, replace the damaged gear; (11) the machine Caused by a large impact shock, find the source of vibration and deal with it.