Folding machine failure causes and troubleshooting

1. There were two or more sheets of paper.

1 Reason: The block paper brush is too low or extends too far into the stack so that the paper cannot be fully blown loose.

Remedy: According to operation and positioning requirements, the brush is adjusted to the correct position and the paper is loosened.

2 Reasons: The paper suction nozzle lacks wind power, and the loose paper blowing mouth is not appropriate.

Exclusion method: The suction force (amount) can be increased according to the nature and requirements of the paper; the loose paper mouthpiece can be loosened by blowing about 6 sheets of paper on the surface of the pile.

3 Cause: The paper is thin and the amount of air suction is too large. Take the first paper below.

Remedy: Reduce the amount of air suction or replace the rubber nozzle to a suction nozzle with a small suction force that is suitable for thin paper.

4 Reasons: The paper is not blown loose or there is adhesion on the edges of the paper.

Remedy: According to the paper, adjust the blowing nozzle volume to the level of loosening the paper; the paper stack height and working requirements are appropriate, and the interval time is not easy to be too long; check whether there are stickies on the four sides of the paper stack and exclude it from loosening. normal work.

5 Reasons: The front of the stack is too high.

Remedy: Reduce the height of the front side of the stack or use a wood wedge to increase the low part of the rear side of the stack to the same height as the front side.

2. The paper is skewed or broken (ie, missing sheet).

1 Reason: The suction nozzle of the separation paper and the feed roller of the transfer paper are insufficient, resulting in missing sheets.

Remedy method: According to the paper, increase the air volume of the paper nozzle and the transfer roller, or replace the big circle rubber nozzle with larger air volume.

2 Reasons: The suction nozzle of the separation paper and the feed nozzle of the delivery roller are not in good contact with the paper, and the suction surface of the suction nozzle is not parallel to the paper surface.

Remedy: Correctly adjust the surface smoothness of the paper and the coordination of the paper feed and delivery nozzles.

3 Cause: The ink nozzle is stained by ink sticks or worn out; the suction nozzle or air path is blocked by paper dust or grease, causing the paper to slip when it is skewed.

Remedy: Always check and keep the rubber suction nozzle and the air path clean, at any time to ensure the smooth flow of the gas path; rubber suction nozzle should be promptly replaced if worn out.

4 Reasons: The pile of paper is not even, causing difficulty in attracting paper and skewing the paper after it is sent out.

Remedy: Load paper flat.

5 Reason: The amount of wind at the front of the stack is insufficient, making it difficult to advance the paper or sending it out causing skewed paper.

Remedy: Increase the pressure of the blower mouth and increase the front mouthpiece according to the paper.

6Cause: The pressure of the platen roller is inconsistent, the belt is not tightly stretched, and the pressure caused by the pressure on some paper ball (or wheel) is not equal.

Remedy: According to the paper, according to operational positioning requirements to correctly set its position.

3. The page number is not exactly the same.

1 Reason: The pressure of the ball (or pressure roller) is inconsistent or the pressure is not proper.

Remedy: Adjust the pressure appropriately so that the pressure is consistent.

2 Reasons: The punching knife is not sharp or the insert and knife ring are not installed properly.

Remedy: Replace the punch knife blade and set the distance between the knife and the knife ring with the correct spacing.

3 Reason: The length of the positioning pin (ie, the knife needle) on the knife is not appropriate.

Remedy: Adjust the positioning pin so that it is the same length.

4 Cause: The folding knife is not parallel to the folding roller and has a sound that rubs against the folding roller.

Remedy: Adjust the knife edge so that it aligns with the gap between the two folding rollers, and ensure that it is parallel to the axis of the folding roller.

5 Causes: The transmission line is inconsistent with the elasticity, and it is damaged or broken.

Remedy: Tighten each conveyor line with a tight adjustment and replace the damaged one.

4. The length of the side of the signature is not uniform or skewed.

1 Reason: Both ends of the knife are inconsistent, that is, they are not parallel to the folding roller.

Remedy: Adjust the folding knife to be parallel to the axis of the folding roller so that the height of both ends is the same when the sheet is pressed into the gap of the folding roller.

2 reasons: the two ends of the folding roller are not tight, that is, the spacing of a pair of folding rollers is not equal.

Remedy: Cut the axis of a pair of folding rollers to make them parallel.

3 Reason: The adjustment of a certain discount is not appropriate.

Remedy: Check the rules of each fold in turn and make adjustments.

4 Reason: Improper installation of punch knife.

Remedy: Adjust the punch knife so that the position of the nick is consistent with the crease.

5 Reason: The length of the positioning needle is inconsistent. Brush pressure or distance is not appropriate.

Remedy: Adjust the positioning pin so that it is the same length. According to the requirements of the correct setting brush position.

5. Pull the paper out of position or paper wrinkles.

1 Reason: Pull gauge pull is improper.

Remedy: Adjust the pull gauge tension according to the pull gauge page.

2 reasons: Rafah pressure cardboard is not appropriate.

Remedy: Adjust the height of the paperboard properly according to the timing of drawing and the thickness of the paper.

3 Reasons: The position of paper feeding is not appropriate.

Remedy: Check the paper in all aspects of the conveying process and adjust it as required to ensure that the paper is in place.

4 reasons: page curl or corners.

Remedy: After the collision, check it carefully. When loading paper, it must be leveled.

6. The sheet is jammed or paged during delivery.

1 Reason: The paper feed is skewed.

Remedy: Check the paper in all aspects of the conveying process and adjust it as required to ensure that the paper is in place.

2 Reasons: There are corners or breaks, adhesions, etc. on the sheets.

Remedy: Check that there is paper loading on the bumper and remove the damaged paper.

3 Reasons: The feeder feeds two or more sheets.

Remedy: See 1. There are two or more sheets in the paper.

4 reasons: pressure bar, pressure roller is too low, page transmission is not smooth.

Remedy: Adjust the distance between the high pressure rod and the pressure roller.

5 Cause: The transmission line is broken or broken.

Remedy: Replace the conveyor belt.

7. There is an error in the skew and crease of the punch knife.

1 Reason: The folding knife and folding roller should not be placed in a wrong position, skewed or not parallel.

Remedy: Cut the knife edge so that it aligns with the gap between the two folding rollers, and ensure that it is parallel to the axis of the folding roller.

2 Cause: Skew or obstructed when feeding.

Remedy: Check the paper in the transport process in all aspects, according to the requirements of the correct adjustment.