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In the printing of corrugated box products, the feed accuracy is particularly important for the quality of the product. If the precision of paper feeding in the production of products by corrugated box printing machinery does not meet the requirements for carton production, the products produced may be waste products. If the accuracy of product feeding does not meet the requirements of the customer, it must be analyzed and a solution must be sought. .
Causes of Paper Feeding Placement Analysis The serious wear of the feed roller can cause the elasticity and pressure of the feed rubber roller to change, and it can not meet the friction when feeding the paper.
Defective feed rubber roller was used. Paper feed rollers are all consumables and most of the original manufacturers do not list them in the warranty. In order to save costs, customers often do not use the original rubber roller when the paper-feeding rubber roller is seriously worn. Instead, they purchase paper-feeding rubber rollers from an unknown small company, or let the small-scale processing plant perform the old roller. Processing. The original manufacturer has strict requirements on the material and design hardness of the rubber roller, requiring wear resistance, temperature resistance, pressure resistance, etc., and the small plant and customer maintenance personnel do not know much about this.
The operator of the equipment misadjusted the gap between the feed roller and the feed bottom roller. If the clearance adjustment is too large, the contact between the paper board and the feed roller is not tight enough, and the friction is small, resulting in unstable feeding and inconsistent feed positions. If the feed roller gap adjustment is too small, it will cause difficulty in feeding and cannot be properly transferred to the front printing unit. Generally, this happens to new operators who have not enough experience, or the gap data of the feed bottom roller and the feed roller is not corrected after replacing the feed roller, and the actual gap and the computer can display ( Or the size of the dial is inconsistent, causing the operator to quickly set the correct size of the gap between the rollers.
Cardboard in the paperboard production line indentation is too deep, so that the thickness of the cardboard at the indentation is thin, when the indentation sent to the intersection with the feeding roller, the pressure of the roller is not enough, friction is reduced, the paper feeding roller will be The cardboard slipped, causing the feed position to shift back and forth.
The feed tires on the leading edge paper feed platform are seriously worn and cause uneven paper feed friction, resulting in paper feed. The use of inferior paper-feeding tires can also affect the stability of the paper-feeding due to the large quality difference between the material, hardness and size specifications and the original solar tires.
Most of the inverter motors are now used. If small and thin cardboard (less than 650mm in length and less than 3mm in thickness), the air volume setting should be smaller. If the air volume is too high, the adsorption will be too tight and the paperboard will stick tightly to the grid panel.
Front edge paper feed platform is equipped with dampers. In order to ensure uniform suction, the opening of large paperboard and small paperboard dampers is different. Do not close the dampers on both sides when producing large paperboards. .
Sometimes when the operator is producing thin cardboard, in order to ensure the dust removal effect, the position of the dust brush of the paper feeding unit is often turned down. When the cardboard is to be produced, the position of the brush is not remembered to be increased, resulting in sending. In paper, the cardboard collided with the brush, the cardboard was resisted, and the paper was fed.
Causes of paper feed skew Due to abnormal wear, a certain position on the side of the feed rubber roller wears badly, or the left and right gaps are not adjusted after the replacement of the new feed roller, resulting in a non-uniform force of the feed paper. The side of the worn rubber roll is subjected to a large force, and the cardboard friction force causes the cardboard on this side to be transmitted first.
Some tires of leading edge paper feed tires are very worn, resulting in a non-uniform stress plane on the leading edge paper feed tires. The friction on one side of the wear is not enough, resulting in slippage of the tires and paperboard on this side of the paper feed. Hysteresis, so the cardboard side of the transmission surface without wear greater force, the cardboard side of the first transmitted out, causing the paper to go oblique.
The front edge feed platen grids are not parallel to each other, the grid plates are worn, or the oil-retaining bearings of the movable connecting rods on the grid plate are worn out, which may cause one side of the grid plate to feed the paper. With the non-uniform friction force of the paper-feeding tires, the lower side of the grid plate is subjected to a large force, and the paperboard is sent out first, causing the paper feed to go obliquely.
The left and right front bezels of the paper feed unit are inconsistent. If the gap is not properly adjusted, resistance will be generated at the time of paper feeding, and there will be no resistance at the same time. This will also cause paper feed skew.
The solution of the paper-feeding position should be promptly replaced when the rubber roller is worn out. It is best to use the original equipment manufacturer's feeding roller. If you process the plastic package, you need to know the technical parameters of the material and hardness of the roller, and follow the requirements. Factory processing. Strengthen the technical level of the operator, and adjust the gap of the feed roller properly. When the board is produced, the indentation can meet the carton forming and should not be too deep. Timely replacement of worn paper feed tires without the use of inferior tires. According to different specifications of the cardboard to adjust the different adsorption air volume, switch damper. The height of the dust brush is adjusted properly. Do not touch the paperboard too low. Otherwise it will cause resistance and paper feeding difficulties.
Paper feed skew solution Replace the non-normally damaged feed roller and align it side-by-side after replacement. Replace front-feed tires that are heavily worn as well, preferably replacing them all together. Replace the worn grid plate connecting rod assembly, especially the oil-bearing bearing, and adjust the parallelism between each grid plate so that the paper feeding force is even. Do not ignore the adjustment of the front baffle. Correct the level of the left and right front baffles to be consistent. The height setting is about 1.3 to 1.5 times that of the cardboard.
It is best to maintain the equipment feeding accuracy and always care for the equipment. For example, promptly remove debris on the leading edge paper feed platform to prevent damage to the paper feed tires by rubbing too long; frequently check the grille bars fixing the connecting rod screws, and periodically tighten to maintain the parallelism of the leading edge feed platform grid gratings Therefore, the phenomenon of skewed paper feeding will be less. Of course, if there is a phenomenon that the accuracy of paper feeding is inaccurate, follow the analysis and resolution methods provided above for processing.
Causes of Paper Feeding Placement Analysis The serious wear of the feed roller can cause the elasticity and pressure of the feed rubber roller to change, and it can not meet the friction when feeding the paper.
Defective feed rubber roller was used. Paper feed rollers are all consumables and most of the original manufacturers do not list them in the warranty. In order to save costs, customers often do not use the original rubber roller when the paper-feeding rubber roller is seriously worn. Instead, they purchase paper-feeding rubber rollers from an unknown small company, or let the small-scale processing plant perform the old roller. Processing. The original manufacturer has strict requirements on the material and design hardness of the rubber roller, requiring wear resistance, temperature resistance, pressure resistance, etc., and the small plant and customer maintenance personnel do not know much about this.
The operator of the equipment misadjusted the gap between the feed roller and the feed bottom roller. If the clearance adjustment is too large, the contact between the paper board and the feed roller is not tight enough, and the friction is small, resulting in unstable feeding and inconsistent feed positions. If the feed roller gap adjustment is too small, it will cause difficulty in feeding and cannot be properly transferred to the front printing unit. Generally, this happens to new operators who have not enough experience, or the gap data of the feed bottom roller and the feed roller is not corrected after replacing the feed roller, and the actual gap and the computer can display ( Or the size of the dial is inconsistent, causing the operator to quickly set the correct size of the gap between the rollers.
Cardboard in the paperboard production line indentation is too deep, so that the thickness of the cardboard at the indentation is thin, when the indentation sent to the intersection with the feeding roller, the pressure of the roller is not enough, friction is reduced, the paper feeding roller will be The cardboard slipped, causing the feed position to shift back and forth.
The feed tires on the leading edge paper feed platform are seriously worn and cause uneven paper feed friction, resulting in paper feed. The use of inferior paper-feeding tires can also affect the stability of the paper-feeding due to the large quality difference between the material, hardness and size specifications and the original solar tires.
Most of the inverter motors are now used. If small and thin cardboard (less than 650mm in length and less than 3mm in thickness), the air volume setting should be smaller. If the air volume is too high, the adsorption will be too tight and the paperboard will stick tightly to the grid panel.
Front edge paper feed platform is equipped with dampers. In order to ensure uniform suction, the opening of large paperboard and small paperboard dampers is different. Do not close the dampers on both sides when producing large paperboards. .
Sometimes when the operator is producing thin cardboard, in order to ensure the dust removal effect, the position of the dust brush of the paper feeding unit is often turned down. When the cardboard is to be produced, the position of the brush is not remembered to be increased, resulting in sending. In paper, the cardboard collided with the brush, the cardboard was resisted, and the paper was fed.
Causes of paper feed skew Due to abnormal wear, a certain position on the side of the feed rubber roller wears badly, or the left and right gaps are not adjusted after the replacement of the new feed roller, resulting in a non-uniform force of the feed paper. The side of the worn rubber roll is subjected to a large force, and the cardboard friction force causes the cardboard on this side to be transmitted first.
Some tires of leading edge paper feed tires are very worn, resulting in a non-uniform stress plane on the leading edge paper feed tires. The friction on one side of the wear is not enough, resulting in slippage of the tires and paperboard on this side of the paper feed. Hysteresis, so the cardboard side of the transmission surface without wear greater force, the cardboard side of the first transmitted out, causing the paper to go oblique.
The front edge feed platen grids are not parallel to each other, the grid plates are worn, or the oil-retaining bearings of the movable connecting rods on the grid plate are worn out, which may cause one side of the grid plate to feed the paper. With the non-uniform friction force of the paper-feeding tires, the lower side of the grid plate is subjected to a large force, and the paperboard is sent out first, causing the paper feed to go obliquely.
The left and right front bezels of the paper feed unit are inconsistent. If the gap is not properly adjusted, resistance will be generated at the time of paper feeding, and there will be no resistance at the same time. This will also cause paper feed skew.
The solution of the paper-feeding position should be promptly replaced when the rubber roller is worn out. It is best to use the original equipment manufacturer's feeding roller. If you process the plastic package, you need to know the technical parameters of the material and hardness of the roller, and follow the requirements. Factory processing. Strengthen the technical level of the operator, and adjust the gap of the feed roller properly. When the board is produced, the indentation can meet the carton forming and should not be too deep. Timely replacement of worn paper feed tires without the use of inferior tires. According to different specifications of the cardboard to adjust the different adsorption air volume, switch damper. The height of the dust brush is adjusted properly. Do not touch the paperboard too low. Otherwise it will cause resistance and paper feeding difficulties.
Paper feed skew solution Replace the non-normally damaged feed roller and align it side-by-side after replacement. Replace front-feed tires that are heavily worn as well, preferably replacing them all together. Replace the worn grid plate connecting rod assembly, especially the oil-bearing bearing, and adjust the parallelism between each grid plate so that the paper feeding force is even. Do not ignore the adjustment of the front baffle. Correct the level of the left and right front baffles to be consistent. The height setting is about 1.3 to 1.5 times that of the cardboard.
It is best to maintain the equipment feeding accuracy and always care for the equipment. For example, promptly remove debris on the leading edge paper feed platform to prevent damage to the paper feed tires by rubbing too long; frequently check the grille bars fixing the connecting rod screws, and periodically tighten to maintain the parallelism of the leading edge feed platform grid gratings Therefore, the phenomenon of skewed paper feeding will be less. Of course, if there is a phenomenon that the accuracy of paper feeding is inaccurate, follow the analysis and resolution methods provided above for processing.
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