Heidelberg K series offset press failure and troubleshooting (on)

Heidelberg K series offset press failure and troubleshooting (on)

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Fault 1: printed goods bite, wrinkle

The reason:

1The front gauge paper claw is inserted into the paperboard with too many gaps, and the paper jam is collided with the paper edge that has not been released at the bottom dead center, curling and rotting the paper mouth;

2 The former rules give way to late or give up, and the paper edge between the paper teeth is broken;

 3 oscillating hand paper kicking paper;

4 The oscillating paper teeth interfere with the embossing roller, or the crepe paper is not flat, and the heights of the two ends are different;

5 impression cylinder bites the rotten paper mouth;

6 side gauges are not properly pulled, and when the paper is thin, it is easy to wrinkle;

7 The ambient temperature is high, or improperly stored to make the paper damp;

   Exclude:

1Adjust the front gauge paper limit screw and insert the paper stopper into the gap of the paperboard lmm (depending on the bite mouth, so as not to touch the paper edge of the paper clip);

2 Repair the front gauge to make the cam wear surface or the pressure surface, so that the oscillating paper feeder bite is kept about 3mm;

3 Correctly adjust the height of the paperboard so that the board surface of the junction is coherent with the working surface of the paper pad, or slightly higher than the surface of the tooth pad by about 0.5-lmm;

4 Adjust the two fine adjustment screws on the transfer paper holder so that it is about 1mm away from the impression cylinder and the mouth is suitable;

5 A.repairing the worn roller open cam working surface;

B. If the roller is improperly handed over (at this time, the bite is generally large), pull out the transfer tooth on the shaft diameter of the impression cylinder to control the cam positioning pin, check for signs of bending or breakage, and loosen the fastening bolts. Returning the control cam to the line position counterclockwise;

C. If the drum bite is small, just move the control cam clockwise and then tighten the positioning;

D. The cam has been adjusted and tightened before leaving the factory, generally can not be easily adjusted, only when the machine is repaired Or other methods to consider adjustments if the troubleshooting does not work.

6 Carefully adjust the side gauges to make the thin paper pass smoothly;

7 dry the paper to reduce the ambient humidity.

Fault 2: Receiving the paper and not getting the printed sheet

The reason:

1 When the paper-carrying teeth are handed over to the roller, the paper-feeding time is too short, or there is no overlapping time at all, so that the paper is out of control and falls off;

2 The position of the pick-up teeth is ahead of the roller, so that the transfer bite paper is too small and the vibration is off;

3 The compression spring fails or the elasticity is weakened, so that the biting force of the delivery tooth becomes smaller, or the teeth are improperly adjusted, so that some of the teeth can not hold the paper or the hair is not tight and falls off;

 4 The front gauge is out of balance, the roller teeth are less bite, and the paper receiving teeth are less bitten;

5 chain wear makes the chain length longer, or the drive sprocket and gear wear is serious, or the wear of the delivery tray shaft is elongated and the wear of each row is uneven, resulting in different delivery conveyor steps, ie The spacing between the adjacent rows of teeth is not equal, the position of the intersection with the roller is unstable, causing the paper to fail, and even interfere with the drum to damage the machine;

 Exclude:

1Adjust or repair the worn chain paper-engaging cam face so that there is an appropriate overlap (common) bite time:

2Adjust or replace the compression spring to keep the bite force of each tooth even and appropriate;

3Adjust the delivery tray and the roller row so that the two can transfer the paper at a constant speed at the tangent point (relative speed is zero);

4 adjust the front gauge to make the bite increase;

5 Adjust the center distance of the sprocket, tighten the chain, borrow the position of the drive sprocket transmission gear, or replace the chain, sprocket and shaft seat with severe wear.

Fault 3: Imprinting is not allowed, wrinkle, roll rubber

The reason:

1 The parts are worn or broken, causing the paper clip to move in a skewed state, resulting in irregular overprinting and wrinkling of the paper;

A. One side or both sides of the fixed rail are worn;

B. the needle bearing wear or failure;

C. the side gap of the sector gear increases;

D. The screw tail taper pin Φ8X60 is sheared due to fatigue or strong impact load, resulting in Φ22 shaft wear (supporting sector gear) or bearing failure.