The bad side-regulation will lead to inaccurate overprinting, which will increase the scrap rate and cause serious waste to the company. So how can we determine whether the side-sheet pulls are normal or not? It can be analyzed and judged according to the following situations.
â— Judgment according to the rules of printing products: Take out a little bit of the printed product and check whether the distance between each rule line and the paper edge is the same. If they are consistent, it means that the side paper is normal, otherwise it is abnormal.
â— Judging according to the color standard of the printed product: Take out the printed product, observe and compare whether the color code size of each printed product is the same. The same indicates normal, otherwise it is abnormal.
â— Judging from the midline of the printed product: Some papers are cut obliquely. If you only look at the gauge and the color mark, it is impossible to accurately determine whether the side pull paper is normal. In this case, it is advisable to take part of the product and apply it to the mouth (or to pull it slightly). Then push the paper with both hands and try to align the open paper to see if the center line of the tip (or bite) is in place. The same line. If the midline of each print is on the same line, it means the side gauge is normal. If there is any error, it means there is a problem with the side gauge.
â— Judging from the overprint pattern of the printed product: If the pattern overprinting is correct, then the side-sheet pull-out is OK. If the overprinting is not correct, it means that there is a problem with the side-sheet pull-out. In addition, if the overprint is close to the gauge distance, and the other end is incorrect, it indicates that the paper is not stretched.
â— Judging from the edge condition of the pull tab of the paper: when the edge of the paper has a jagged jagged crack, it means that the side slap pulls the paper; when the edge of the paper is almost wide, it is crumpled with the pulling pulley. In the case of a breach, the paper is too far from the side scale and does not reach the position; when the penetrating pinhole appears in the position touched by the pull tab of the print sheet, it indicates that the pull-up time is a little late, and the tooth is lifted. Compete for paper.
â— Judging from the pressure anomaly: Sometimes there is a certain relationship between side-sheet pull-out anomaly and pressure build-up. When the pull-out time of side-line gauge is too early, it will cause the paper not to reach the bottom position. Lateral rules pull, resulting in a combined pressure that is stopped.
â— Judging from the feeling: whether the paper is normal or not, can also be judged according to the feel. During the operation of the machine, pull the pull roller of the gauge by hand, and determine the length of rotation (pull gauge). Pulling too long can easily cause the paper to pull over. If it is too short, it may cause the paper to not pull out.
â— Judging from the comparison of the push-pull gauge's movements: If you suspect that there is a problem with the active side gauge pull time, you can lower the corresponding side gauge, and then you can observe whether the landing time of the two sides or the pull roller is in motion. Consistent, if not consistent, it means that the pull time is wrong.
â— According to the method of detecting the paper pressure tongue, when the paper pressure tongue is too low, it is easy to cause the paper to not pull out. When it is too high, it will cause the paper to pull. Judgment is normal, you can tear off a small piece of printed paper, folded into a three-fold, and then point the car until the pull gauge falls, then insert the folded paper into the tongue, observe the pressure between the paper tongue and the transfer station The size of the gap, in order to determine whether the pull gauge is normal, generally when the paper is inserted into the pressure paper tongue, it feels a little bit of tension is normal.
â— Judgment according to the rules of printing products: Take out a little bit of the printed product and check whether the distance between each rule line and the paper edge is the same. If they are consistent, it means that the side paper is normal, otherwise it is abnormal.
â— Judging according to the color standard of the printed product: Take out the printed product, observe and compare whether the color code size of each printed product is the same. The same indicates normal, otherwise it is abnormal.
â— Judging from the midline of the printed product: Some papers are cut obliquely. If you only look at the gauge and the color mark, it is impossible to accurately determine whether the side pull paper is normal. In this case, it is advisable to take part of the product and apply it to the mouth (or to pull it slightly). Then push the paper with both hands and try to align the open paper to see if the center line of the tip (or bite) is in place. The same line. If the midline of each print is on the same line, it means the side gauge is normal. If there is any error, it means there is a problem with the side gauge.
â— Judging from the overprint pattern of the printed product: If the pattern overprinting is correct, then the side-sheet pull-out is OK. If the overprinting is not correct, it means that there is a problem with the side-sheet pull-out. In addition, if the overprint is close to the gauge distance, and the other end is incorrect, it indicates that the paper is not stretched.
â— Judging from the edge condition of the pull tab of the paper: when the edge of the paper has a jagged jagged crack, it means that the side slap pulls the paper; when the edge of the paper is almost wide, it is crumpled with the pulling pulley. In the case of a breach, the paper is too far from the side scale and does not reach the position; when the penetrating pinhole appears in the position touched by the pull tab of the print sheet, it indicates that the pull-up time is a little late, and the tooth is lifted. Compete for paper.
â— Judging from the pressure anomaly: Sometimes there is a certain relationship between side-sheet pull-out anomaly and pressure build-up. When the pull-out time of side-line gauge is too early, it will cause the paper not to reach the bottom position. Lateral rules pull, resulting in a combined pressure that is stopped.
â— Judging from the feeling: whether the paper is normal or not, can also be judged according to the feel. During the operation of the machine, pull the pull roller of the gauge by hand, and determine the length of rotation (pull gauge). Pulling too long can easily cause the paper to pull over. If it is too short, it may cause the paper to not pull out.
â— Judging from the comparison of the push-pull gauge's movements: If you suspect that there is a problem with the active side gauge pull time, you can lower the corresponding side gauge, and then you can observe whether the landing time of the two sides or the pull roller is in motion. Consistent, if not consistent, it means that the pull time is wrong.
â— According to the method of detecting the paper pressure tongue, when the paper pressure tongue is too low, it is easy to cause the paper to not pull out. When it is too high, it will cause the paper to pull. Judgment is normal, you can tear off a small piece of printed paper, folded into a three-fold, and then point the car until the pull gauge falls, then insert the folded paper into the tongue, observe the pressure between the paper tongue and the transfer station The size of the gap, in order to determine whether the pull gauge is normal, generally when the paper is inserted into the pressure paper tongue, it feels a little bit of tension is normal.
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