Troubleshooting of crumpled paper at the tip of the folding machine triangle

The tip of the folding machine triangle is the "hardest hit" of crumpled paper, and most of the crumpled paper occurs here. There are many types of crumpled paper at the tip of the folding machine. The most common ones include: 1 Starting from the platen roller on the RTF roller of the folding machine or the middle skipping knife (the cutter is used when the product needs to be cut) Wrinkles obliquely below the tip of the nose; 2 the tape is folded into a continuous line in front of the tip of the nose; 3 is continuously wrinkled on one side of the tip of the nose and normal on the other side; 4 is fine on one or both sides of the tip of the nose. Wrinkles; 5 pairs of paper, the top piece of paper is normal, and the inside of a piece of paper wrinkles at the tip of the nose.

When starting up, you can run at the lowest speed first, judge the possible causes according to the wrinkle paper displayed by the tape, and make corresponding adjustments. First of all, it is necessary to eliminate the uneven pressure of the platen roller on both sides of the RTF tape, causing the paper tape to run off and causing the problem of wrinkled paper. The second is to adjust the first set of parallel paper guide rollers under the triangular plate, which can basically solve the problem of crumpled paper at the tip of the nose of more than half of the triangular plates. The adjustment reference is: 1 high and low position, the sides of the tip of the triangle have a curvature, the height of the two parallel rollers is

Determined by this curvature, the parallel roller should be located at the center of the arc, and the height of the front and rear should be consistent; 2 left and right positions, the left and right positions of the two parallel rollers relative to the tip of the triangular plate should be determined according to the thickness and number of sheets of the paper. The distance between the tip of the nose and the two parallel rollers should be the same. When pulling a paper, insert a strip of paper between the paper strip and the nip roller to feel the tension, but it should not be too heavy; 3 the angle between the two rollers, Although referred to as a parallel roll, the two rolls are often not parallel, but rather require a certain angle between the two rolls for paper strip adjustment. If the tip of the triangle is at the front and the edge of the paper is at the back, the nip roller will be opened and the paper will be pushed backwards, which can solve some problems of slight wrinkles at the tip of the nose; It can be pushed by the paper guide roller to the tip of the nose, which can be adjusted when the tape is broken by the tip of the nose. In addition, by reducing the distance between one roller on one side and the tip of the triangle, you can push the tape to the other side, which can change the tightness of the tape at the tip of the nose to correct the wrinkle and change the tape. The position of the fold at the tip of the nose.

The combination of these methods can solve the problem of slight wrinkles at the tip of the triangular plate, but for the more serious wrinkles, such as the continuous folding of the tape mentioned above at the tip of the nose, it is necessary to use "drug", that is, Adjust the position of the tip of the triangle.

It is not an exaggeration to refer to the adjustment of the position of the tip of the triangular plate as "strong drug", because the paper tape should complete the first vertical folding at the tip of the triangular plate, so the position of the tip of the triangular plate has a great influence on the paper feeding, and it is generally measured from the tip of the nose. The distance between the wall panels of the folding machine, the distance is small, the paper tape is easily broken by the folding machine, and the paper is very easy to wrinkle the paper, so once it is adjusted, it is not easy to change. Many folding machines used in newspaper printing have used the position of the tip of the triangular plate for many years.

But recently one of our orders used recycled paper from Taiwan. Compared with the paper made of the original wood fiber, the recycled paper has a short fiber length and a low surface strength, so that the paper is easily broken and is broken by the tension roller when the paper is connected. Therefore, we have to adjust the position of the tip of the triangular plate to increase the distance between the wall and the wall plate from the original 180 mm to 185 mm to solve the problem of paper break. Sometimes there is a slight wrinkle failure, then the first set can be adjusted. Parallel paper guide roller method to correct.

In addition to the above-mentioned methods for solving wrinkle paper failures, the function of some machines can be used to solve the problem of wrinkled paper in printing. For example, the OVERSPEED function of the folding machine RTF roller, usually the faster the RTF roller rotates, the more paper is sent to the folding machine, the greater the tension of the paper tape, the OVERSPEED function can keep the paper tape at a certain tension without As for the tension is too tight, to solve some of the problems caused by the excessive tension of the paper strip at the folding machine.

In addition, the blowing function on the side of the triangle of the folding machine can also eliminate the wrinkle paper failure to some extent. The hair dryer on the side of the triangle of the folding machine can prevent the paper tape from being smeared due to the closeness of the triangular plate. In addition to the side air blowing, some folding machines also add a hair dryer at the tip of the nose to lift the paper tape upward along the tip of the nose. When the outer tape is normal and the inner paper wrinkles, the air volume of the air blow can be appropriately increased to correct it.

When encountering a wrinkle paper failure, you should carefully observe it, analyze it carefully, and try more. Once you have identified the problem, take bold action. We have encountered serious wrinkles in the paper, and finally ruled out the wrinkle paper failure, but found that the tip of the triangle plate is not in the midline position, the overprint is not allowed, the jump knife in the middle of the RTF roller can not be cut on the center line, so move The position of the RTF roller, and then the position of the plate positioning pin on the plate cylinder, finally solved all the problems. In short, when you encounter problems, you start with a simple and easy method. As long as you can achieve the purpose of solving the problem, nothing can't move.