Folding machine is a necessary book binding equipment. In order to meet the needs of the printing market, especially in the case of customers' increasing requirements on production cycle, quality, personalized printing, etc., the traditional manual folding machine and low-speed folding machine can no longer meet the printing. When users use high-speed folding machines, they may not be able to give full play to their high-speed folding efficiency due to unskilled operation or fuzzy mechanical principles. The common problems in the hybrid folding machine are now analyzed for your reference.
1. Unstable pull wire
There are many reasons for the instability of the gauge wire, which should be noted from the following aspects:
1. The operating edge of the paper table is too far away from the entrance of the drawing frame;
2. Improper mixing ratio of steel balls and plastic balls (usually thin paper steel has more plastic and less thick paper steel has less plastic);
3. The end of the supporting steel sheet on the bridge is at the edge of the paper end;
4. The pressure of the first and second sets of folding rollers is too light or the pressure at both ends is uneven;
5. One-fold fence front blocking rule and 900 of cut paper are not correct.
2. Paging phenomenon
Running pages means that the pages in a folded signature cannot be close to the back. The page running is generally after two or three folds. The main reason is that the inner and outer friction of the folding roller are different when the knife is cut vertically.
Solution:
1. Adjust the pressure of the folding roller to make it less pressure near the stopper;
2. Adjust the vertical folding knife to make it a little oblique, to ensure that the folding knife on the side far from the stopper will touch the paper table first when lowering the knife;
3. When the paper reaches the regular positioning of the second and third folds, the center line of the paper should be on the same line as the folding knife of the next fold. [next]
Three, one fold paper corner
Folding is more common in the folding process, especially when folding paper under 70g, which is mainly caused by the unevenness between each guide plate and the folding roller, because when the paper passes through the folding roller, if the gap between the guide plate and the folding roller is too Larger, the paper in motion will easily enter the secondary gap, resulting in a fold.
Solution: The upper and lower positions of the guide plate can be adjusted so that the gap between the folding roller and the left and right is the same.
Four, two-fold punching is not correct
1. The folding roller gap is too large or the two ends are inconsistent;
2. Improper depth of the two-fold knife;
3. The upper and lower distances of the front end of the two-fold knife are not appropriate (when the paper is conveyed by the folding roller, the regular edge of the paper should be close to the front rule);
4. Check whether the punching blade is worn.
The above four points are some common problems of using folding machine, usually only need to adjust the machine to solve. When operating the high-speed folding machine, you must first refer to the product's instruction manual to understand the various performances and precautions of the machine. After understanding and understanding, then operate it, so as to avoid unnecessary problems.
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