Newspaper printing is a race against time and has a strong timeliness. Breaking paper has become a major factor affecting the timeliness of the printing industry. At the same time, the second boot caused by broken paper, wasted paper and other printing supplies, but also devoured the mill's meager profits.
How to cut off paper or paper has become a problem that needs to be solved urgently.
First, the danger of broken paper
1. Influence the publishing time limit of newspapers. Statistics, such as cutting a piece of paper at a time, from the break to the second boot, take about l2 minutes. If the paper breaks cause secondary hazards, such as squeezing the blanket or breaking the paper around the rollers, the delay will be even longer. Long. In time- and time-critical distribution markets, if there is a time-sensitive accident, it will affect the market share of newspapers. In terms of printing plants, frequent outbreaks will affect their credibility, and serious losses will result in the loss of customers.
2. Affect printing factory profits. Taking the example of the four evening newspapers of our four towers and printings of the 32nd edition, a piece of paper was cut off and the second time started to generate more than 1,200 pieces of waste newspapers, about 5,000 pairs of papers were opened, which caused a waste of more than 100 kilograms of paper and was calculated at 5,500 yuan/ton. That is, more than 600, this is not ink, fountain solution and other consumables. In addition, printing and editorial departments and distribution companies all have time-saving rewards and penalties. Delays and delays in the printing of the factory have to pay fines, and the loss is even greater.
3. Secondary damage caused by paper breaks. In the high-speed operation interruption paper often crushed the blanket, replacing a blanket took 15 minutes, a blanket l000 multiple, it can be seen the harm. In addition, the high-speed web break machine does not have a buffer, resulting in a hard landing and severely affecting the service life of the machine.
Second, the cause of the broken paper and the solution
(a) Causes of Paper
Needless to say, paper quality problems are a very important cause of paper breaks. The common paper diseases are: holes in the paper, broken paper after the paper break detection; adhesion between the upper and lower layers of the paper, the paper is torn during printing, and the paper breaks; there is a broken edge and a hidden void in the paper. The timely detection and processing of the paper breaks the paper, and the eccentricity of the paper roll generated in the production, transportation and storage of the paper is too large to easily print the paper; the joint in the paper roll is easily broken; the paper is not good in pulling force, and is also prone to break.
Solution: 1 Enhance communication with the paper mills, keep the paper samples, and let the paper mills strengthen quality control. 2 Paper storage handling should be standardized to avoid damage to the paper. 3 The problematic paper was found to be replaced in time.
(B) Reasons for printing equipment
1. The paper feed section is faulty. Common faults caused by electrical faults are caused by abnormal web breaks, program disturbances, paper rolls, non-paper reels, running paper, etc.; mechanical failures are mainly problems of brake pads. We have problems with the use of brake pads during the initial use of our 70-machine. Causes the tension to be too small at the time of taking the paper and thus breaks the paper several times.
Solution: 1 Operators must strictly follow the instructions for use. 2 program failure occurs to power off reset. 3 Please check the handling of electrical workers. 4 brake pads to ensure quality, and regular adjustments.
2. Infeed failure. Common faults include shaftless transmission failures, governor failures that cause paper breaks, communication failures that cause paper breaks, and feed roll rubber rollers that cause paper breaks.
Solution: 1 Check the operation status of the feed roller driver and find the problem in time. 2 Check the communication cable. 3 Regularly check and adjust the pressure of the feed roller rubber roller and find that excessive wear occurs and replace it in time.
3. The printing department failed. Common faults have a certain color of motor driver failure caused by the asynchronous paper break; 2 communication failure caused by shaftless transmission fault caused by paper break; 3 spray bar failure caused the machine to spray water in the non-printing state, printing plate due to excessive wet, Broken paper at the time of pressure; we encountered this condition several times. 4 In the printing, the blanket broke off and caused a web break.
Solution: 1 Check the operating status of the drive and find the problem in time. 2 Check the communication cable. 3 Replace the spray bar. Such failures will be analyzed. If the plate is dry, and the pressure is broken and the watermark is on the paper, check the spray bar. 4 check the blanket before starting, especially the type of card is not tight, easy to come out, this is a quality problem, it is best not to use.
4. The paper roller is too thick and easy to break. Long-term printing, such as the paper roller roll is too thick, easy to break the paper, especially when the paper is taken, in general, once a day can be.
5. Pull the paper roller driver down. Pulling the paper roll is an important part of the tension system. We have encountered the situation that the drive overheat protection caused the paper breakage. Often, all the paper paths are broken and the error is serious. Upon inspection, the drive cooling fan is faulty and the fault is eliminated after the replacement. Note: The refrigeration equipment in the electrical cabinet should be checked regularly and the filter should be cleaned regularly to avoid overheating of the driver.
6. A momentary power failure caused a paper break. Because the machine is a shaftless drive, an instant power outage can cause paper breaks in all printing, and it is easy to burn out electrical components. This is a serious hazard, so it is necessary to coordinate with the power supply department. It is necessary to add standby power. There was a momentary power outage in the production of the night shift. The shaft transmission equipment was only stopped and then it was turned on again. All the 70 paper machines were cut off and one of the relays was broken. When the error was serious, the 75 machine with the ups was installed. No downtime did not affect production.
(3) Paper break due to human error
In fact, it is not uncommon for operators to operate improperly or have a weak sense of responsibility resulting in paper breaks. The common ones are:
1. Paper-suppliers have common problems when handling paper. 1 When the paper is handled, the black label is misplaced. This causes the signal to be disordered at the time of paper-feeding, and it is easy to run out of paper; 2 The tape is not well-labeled, causing paper breaks when the paper is received, and often With crushed rubber blanket; 3 after the paper is not the top cone is fastened (non-automatic paper tight paper holder), boot tension is not enough, easy to run edge break.
2. The common problems of the layout staff are: 1) The water traces on the plate are not dried in time after the plate version, causing water in the cylinder and breaking the paper when the machine is turned on; 2) Ink is added to the ink roller accidentally when the ink is added. Too much ink, sticky paper breaks; 3 After printing a print, the electric eye of paper break detection is not wiped in time, resulting in a paper knife hitting the paper when it is turned on; 4 The paper with a narrow width is printed, and then the larger paper is printed. At the time, the blanket was not wiped clean so that the paper was broken when the machine was turned on; 5 the tension wheel in the middle of the printing section was pressed too tightly. At the time of starting up, the paper was cut from the middle to break the paper.
3. When the multi-paper path is printed, the tension is not set properly, the tension does not match, and some papers have great tension and small tension. The paper with small tension runs left and right to cause a paper break.
The solution is to do a good job of employee training, so that operators understand and grasp their own job essentials, and master; 2 strengthen system constraints, so that employees will do a detailed job, do a good job, and strengthen their sense of responsibility.
How to cut off paper or paper has become a problem that needs to be solved urgently.
First, the danger of broken paper
1. Influence the publishing time limit of newspapers. Statistics, such as cutting a piece of paper at a time, from the break to the second boot, take about l2 minutes. If the paper breaks cause secondary hazards, such as squeezing the blanket or breaking the paper around the rollers, the delay will be even longer. Long. In time- and time-critical distribution markets, if there is a time-sensitive accident, it will affect the market share of newspapers. In terms of printing plants, frequent outbreaks will affect their credibility, and serious losses will result in the loss of customers.
2. Affect printing factory profits. Taking the example of the four evening newspapers of our four towers and printings of the 32nd edition, a piece of paper was cut off and the second time started to generate more than 1,200 pieces of waste newspapers, about 5,000 pairs of papers were opened, which caused a waste of more than 100 kilograms of paper and was calculated at 5,500 yuan/ton. That is, more than 600, this is not ink, fountain solution and other consumables. In addition, printing and editorial departments and distribution companies all have time-saving rewards and penalties. Delays and delays in the printing of the factory have to pay fines, and the loss is even greater.
3. Secondary damage caused by paper breaks. In the high-speed operation interruption paper often crushed the blanket, replacing a blanket took 15 minutes, a blanket l000 multiple, it can be seen the harm. In addition, the high-speed web break machine does not have a buffer, resulting in a hard landing and severely affecting the service life of the machine.
Second, the cause of the broken paper and the solution
(a) Causes of Paper
Needless to say, paper quality problems are a very important cause of paper breaks. The common paper diseases are: holes in the paper, broken paper after the paper break detection; adhesion between the upper and lower layers of the paper, the paper is torn during printing, and the paper breaks; there is a broken edge and a hidden void in the paper. The timely detection and processing of the paper breaks the paper, and the eccentricity of the paper roll generated in the production, transportation and storage of the paper is too large to easily print the paper; the joint in the paper roll is easily broken; the paper is not good in pulling force, and is also prone to break.
Solution: 1 Enhance communication with the paper mills, keep the paper samples, and let the paper mills strengthen quality control. 2 Paper storage handling should be standardized to avoid damage to the paper. 3 The problematic paper was found to be replaced in time.
(B) Reasons for printing equipment
1. The paper feed section is faulty. Common faults caused by electrical faults are caused by abnormal web breaks, program disturbances, paper rolls, non-paper reels, running paper, etc.; mechanical failures are mainly problems of brake pads. We have problems with the use of brake pads during the initial use of our 70-machine. Causes the tension to be too small at the time of taking the paper and thus breaks the paper several times.
Solution: 1 Operators must strictly follow the instructions for use. 2 program failure occurs to power off reset. 3 Please check the handling of electrical workers. 4 brake pads to ensure quality, and regular adjustments.
2. Infeed failure. Common faults include shaftless transmission failures, governor failures that cause paper breaks, communication failures that cause paper breaks, and feed roll rubber rollers that cause paper breaks.
Solution: 1 Check the operation status of the feed roller driver and find the problem in time. 2 Check the communication cable. 3 Regularly check and adjust the pressure of the feed roller rubber roller and find that excessive wear occurs and replace it in time.
3. The printing department failed. Common faults have a certain color of motor driver failure caused by the asynchronous paper break; 2 communication failure caused by shaftless transmission fault caused by paper break; 3 spray bar failure caused the machine to spray water in the non-printing state, printing plate due to excessive wet, Broken paper at the time of pressure; we encountered this condition several times. 4 In the printing, the blanket broke off and caused a web break.
Solution: 1 Check the operating status of the drive and find the problem in time. 2 Check the communication cable. 3 Replace the spray bar. Such failures will be analyzed. If the plate is dry, and the pressure is broken and the watermark is on the paper, check the spray bar. 4 check the blanket before starting, especially the type of card is not tight, easy to come out, this is a quality problem, it is best not to use.
4. The paper roller is too thick and easy to break. Long-term printing, such as the paper roller roll is too thick, easy to break the paper, especially when the paper is taken, in general, once a day can be.
5. Pull the paper roller driver down. Pulling the paper roll is an important part of the tension system. We have encountered the situation that the drive overheat protection caused the paper breakage. Often, all the paper paths are broken and the error is serious. Upon inspection, the drive cooling fan is faulty and the fault is eliminated after the replacement. Note: The refrigeration equipment in the electrical cabinet should be checked regularly and the filter should be cleaned regularly to avoid overheating of the driver.
6. A momentary power failure caused a paper break. Because the machine is a shaftless drive, an instant power outage can cause paper breaks in all printing, and it is easy to burn out electrical components. This is a serious hazard, so it is necessary to coordinate with the power supply department. It is necessary to add standby power. There was a momentary power outage in the production of the night shift. The shaft transmission equipment was only stopped and then it was turned on again. All the 70 paper machines were cut off and one of the relays was broken. When the error was serious, the 75 machine with the ups was installed. No downtime did not affect production.
(3) Paper break due to human error
In fact, it is not uncommon for operators to operate improperly or have a weak sense of responsibility resulting in paper breaks. The common ones are:
1. Paper-suppliers have common problems when handling paper. 1 When the paper is handled, the black label is misplaced. This causes the signal to be disordered at the time of paper-feeding, and it is easy to run out of paper; 2 The tape is not well-labeled, causing paper breaks when the paper is received, and often With crushed rubber blanket; 3 after the paper is not the top cone is fastened (non-automatic paper tight paper holder), boot tension is not enough, easy to run edge break.
2. The common problems of the layout staff are: 1) The water traces on the plate are not dried in time after the plate version, causing water in the cylinder and breaking the paper when the machine is turned on; 2) Ink is added to the ink roller accidentally when the ink is added. Too much ink, sticky paper breaks; 3 After printing a print, the electric eye of paper break detection is not wiped in time, resulting in a paper knife hitting the paper when it is turned on; 4 The paper with a narrow width is printed, and then the larger paper is printed. At the time, the blanket was not wiped clean so that the paper was broken when the machine was turned on; 5 the tension wheel in the middle of the printing section was pressed too tightly. At the time of starting up, the paper was cut from the middle to break the paper.
3. When the multi-paper path is printed, the tension is not set properly, the tension does not match, and some papers have great tension and small tension. The paper with small tension runs left and right to cause a paper break.
The solution is to do a good job of employee training, so that operators understand and grasp their own job essentials, and master; 2 strengthen system constraints, so that employees will do a detailed job, do a good job, and strengthen their sense of responsibility.
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