How to Solve the Problems in Printing Slots and Pressing Lines after Printing (Part 2)

3. It is required that the quality of the base paper be better. For the relatively high requirements of the paperboard, good quality paper and paper should be used.

4. The moisture content of the base paper and paperboard should be appropriate. The poorer the quality of the base paper, the drier the paperboard, the higher the chance of pressure lines breaking.

5. Appropriate control of the depth of the pressure line. According to the thickness of the processed paperboard, the gap between the upper and the lower pressure roller is controlled so that the paperboard can obtain the proper pressure line.

6. Control the alignment of the centerline of the upper and lower pinch rollers to prevent misalignment of the pinch rollers.

7. For paperboards with particularly poor quality paper, use a threader.

8. If it is due to the cause of the paperboard drying cracks, you can use water spray method to increase the water content of the cardboard.

The cause of paperboard burrs and solutions

1. The tool is loose. The looseness of the tool is mainly caused by human factors. When the tool is adjusted, the tool is not fixed firmly or the screw is loose, causing a "runner". The solution is relatively simple, just recalibrate and tighten the tool.

2. Tool wear. This problem is generally a natural wear. Just check the tool in time and change the tool in time.

3. The cardboard is damp. There are several reasons for this problem. One is that the base paper has a high moisture content, a high speed, and is not caused by the low tide on the production line; on the other hand, the quality of the base paper is poor, and the remanufactured paperboard is quickly regenerated; High humidity, caused by bad weather. Solve the above problems from the following aspects: First, to replace the base paper, use the moisture content of 12% -14% of the base paper production, more than 14% of the suspended use; second is to properly reduce the speed, improve the dryness of the board The third is the replacement of the base paper, the use of tight raw paper for production; Fourth, increase the industrial fan and other dehumidification equipment, and strengthen the artificial dehumidification.

The problems and solutions of hand-pressing process

The reason why the reflexion does not show double lines and the solution

Under normal circumstances, the indentation line that is manually operated by the crimping machine (or the thread-impacting machine) is double-lined when it is folded in the direction of the facing paper. The so-called non-double-line is that the folding line is not straight and the two-indented indentation Not obvious or imbalanced, resulting in no double line. The reasons are as follows: First, the normal wear of two knives is caused by the inconsistency between the two ends and the intermediate pressure; second, the lower ribs are not centered, causing the indentation line to be offset, and the folds are not double lines; the third is that the equipment itself is not adjusted properly. The pressure at both ends is inconsistent, while the side is large and small, causing the refraction not to appear double.

Solution

1. According to the wear condition of the two knives, cutting and grinding are performed in time to balance the two sides with the middle;

2. According to the double-line situation of reflexion, timely adjustment of the lower rib to make it in normal condition;

3. According to the operation of the equipment, please ask maintenance personnel or operating technicians to adjust the equipment so that it is in the best condition.

Even after the above measures are taken, during the operation, attention should also be paid to the spot checks during the operation to avoid the problems that were just right at the beginning and that the above problems will occur slowly. Therefore, the operator is required to perform necessary and regular spot checks during normal operation.

The specifications are inaccurate, and the causes and solutions for the problem of pressing lines

Under normal circumstances, the pressure line specifications should be accurate. However, this is not the case in actual operation. With the vibration of the crimping machine, some tightening screws will loosen, and problems such as inaccurate specifications and pressure lines will occur. It is normal to have such a problem, but as long as the reasons are carefully analyzed, there will be solutions. The formation of the reasons: First, the rules of tightening screws loose or wear caused by inaccurate specifications, pressure line; second, the operator does not put the cardboard when the position; third is not high enough due to the baffle, the operator forced excessive push Baffles cause inaccurate specifications. Fourth, technicians are not careful when adjusting, and the specifications are adjusted incorrectly, resulting in inaccurate specifications.