Section 2 Methods to Check and Troubleshoot Offsets <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> Offset press operator's biggest distress lies in the failure of the printing process to find the cause of the failure Often for overprinting errors, bars, ghosts, paper baskets, inverted hairs and other faults, we had to stop the school bus. It is common to use two or three hours each time. Sometimes it takes a few days to resolve a fault. Serious loss of working hours. It is estimated that the time taken for offset printing to eliminate malfunctions in daily production accounts for about 5-10% of the total man-hours, which is more than double that of lead printing. This is unfavorable for improving product quality, shortening the publishing cycle, and increasing economic efficiency. For this reason, every operator of an offset press can work hard to improve its technical level in solving problems, and can make greater contributions to factories and countries.
The offset press has a complex structure and high printing process requirements. In addition, the variable factors of paper and ink are large, so the operating technology must be improved. Generally speaking, new workers learn to operate easily. It is more difficult to find out the cause and eliminate the trouble in time whenever there is a defect or malfunction.
There are many factors that produce offset printing faults, and sometimes there are dozens of possible causes for a failure. For example, to identify the source of the record, to avoid taking unnecessary detours and to avoid wasting unnecessary and effective man-hours, the following can be used: Ways.
First, after the analysis method offset printing faults, there are many ways to find out the cause of the fault, and in a variety of methods, the analysis method to find out the cause of the fault is the fastest.
The so-called analysis method is based on the analysis of the time, location, conditions, shape and other aspects of the failure. The subjective factors of the four aspects are listed one by one, and then a comprehensive analysis is performed. Many failures can be solved. In actual production, some operators lack comprehensive analysis of these four aspects after encountering faults, resulting in prolonged downtime and unnecessary man-hour losses.
An example is as follows: During the work process of an offset printing press, the operator finds that the paper is bowed and deformed. The product is a magazine cover, but the two colors are the front four colors. When the reverse side is printed first, the paper is normal, and in reverse, the front side is printed. When printing on the 25th order paper, it is found that there is a 50mm long bowing phenomenon in the paper. After the machine is shut down, an experienced person analyzes various possible factors by analysis. Analysis, preliminary conclusion:
1 The failure was just produced, indicating that there are new factors causing the bow.
The two parts in the paper drag, there may be a machine factor, it may also be paper factors.
3 From the point of view of the shape of the paper basket only 50mm, it cannot be caused by a mechanical failure.
4 From the analysis of paper conditions that produce 50 mm long bows, it is generally possible under the condition of “foliageâ€, but the intuitive paper is very smooth and it is impossible to produce bows. (To be continued)
The offset press has a complex structure and high printing process requirements. In addition, the variable factors of paper and ink are large, so the operating technology must be improved. Generally speaking, new workers learn to operate easily. It is more difficult to find out the cause and eliminate the trouble in time whenever there is a defect or malfunction.
There are many factors that produce offset printing faults, and sometimes there are dozens of possible causes for a failure. For example, to identify the source of the record, to avoid taking unnecessary detours and to avoid wasting unnecessary and effective man-hours, the following can be used: Ways.
First, after the analysis method offset printing faults, there are many ways to find out the cause of the fault, and in a variety of methods, the analysis method to find out the cause of the fault is the fastest.
The so-called analysis method is based on the analysis of the time, location, conditions, shape and other aspects of the failure. The subjective factors of the four aspects are listed one by one, and then a comprehensive analysis is performed. Many failures can be solved. In actual production, some operators lack comprehensive analysis of these four aspects after encountering faults, resulting in prolonged downtime and unnecessary man-hour losses.
An example is as follows: During the work process of an offset printing press, the operator finds that the paper is bowed and deformed. The product is a magazine cover, but the two colors are the front four colors. When the reverse side is printed first, the paper is normal, and in reverse, the front side is printed. When printing on the 25th order paper, it is found that there is a 50mm long bowing phenomenon in the paper. After the machine is shut down, an experienced person analyzes various possible factors by analysis. Analysis, preliminary conclusion:
1 The failure was just produced, indicating that there are new factors causing the bow.
The two parts in the paper drag, there may be a machine factor, it may also be paper factors.
3 From the point of view of the shape of the paper basket only 50mm, it cannot be caused by a mechanical failure.
4 From the analysis of paper conditions that produce 50 mm long bows, it is generally possible under the condition of “foliageâ€, but the intuitive paper is very smooth and it is impossible to produce bows. (To be continued)
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