The quasi-adjustment of the finished layout of the beer mark is an important measure of the appearance quality of the packaged product, which largely determines the market image of the product. However, in the daily production process, due to equipment, operations, processes, raw materials and other reasons, there are many defects in the standardization of beers and the quality defects of the specifications, and the appearance quality of the products will be affected, and the finished products will be scrapped. Loss increases. Therefore, the quality of beer standard products can only be ensured by carefully concentrating on the process technology of various aspects of production.
Beer logos are usually printed using multi-imposition structure printing. The semi-finished products need to be cut into single-format prints. The process is as follows: First, die-cutting machines are used to directly cut semi-finished products and become single-format finished products; First, the semi-finished product is cut into blanks of a single-format painting with a paper cutter, and then the horizontally-punched blanking machine is used to cut the rough-cut single-version label paper into a whole stack and cut into finished products. From the point of view of production efficiency and quality, the two slitting processes have advantages and disadvantages. The former has better accuracy in points, but the edges of the finished products are prone to burrs and cause adhesions, and do not use automated labeling, and the production efficiency is not high; while the latter punching speed Fast, clean edges make the day a monk hit a day to facilitate automatic labeling, but it is easy to produce blanking specifications. In order to achieve a smooth and automatic paste for the global brewery, our factory uses the latter process to stamp out various beer brands, and has obtained certain experience. Now we classify and analyze some problems that the process is not easy to produce.
First, the single-sheet slitting deviation caused by the squeamish paper is not suitable. The MWB-184 horizontal die-cutting machine is used to punch the beer label paper, and the large-sized semi-finished paper printing paper is first cut into several single-format sheets by a paper cutter. The semi-finished product is drawn, and then the single-sheet semi-finished product is sent to the machine for punching off the diagonal paper stock, which becomes a complete finished product paper. If a large sheet of semi-finished product is not well-trimmed, it will inevitably produce deviations. Therefore, the operation of the entire paper is very important. In other words, when picking up the paper, when both the paper edge and the side paper edge are basically tinctures, the paper stack should be lifted up and then the bite paper edge should be reclaimed to avoid red side storage. In the case of a skewed shape, when the two corners of the skewer are aligned, the skewed condition will occur when the monk knocks on the edge of the paper to make a day. This will cause deviations in the printed sheet layout with a skewed edge, resulting in finished products after trimming. Deviations will also occur. Based on this situation, if the first knife is cut, the side edge paper edge and the paper feeder of the paper cutter are aligned in parallel, and the edge of the paper edge should be aligned to the wall plate before being cut. In this way, cutting the first knife is more accurate, and afterwards, each knife is also relatively accurate. Single-cut semi-finished products can be cut accurately, and the finished product die-cutting precision can be reliably guaranteed.
Second, the poor precision of the paper cutting machine caused by the semi-finished products can not accurately identify the semi-finished products will not directly affect the accuracy of the finished product slitting, so the paper machine between the wall plate and the paper feeder angle must be adjusted to a right angle, that is 90 ° Hold state; the specification of the cut of the pusher at each stroke is absolutely the same as the cut size displayed on the machine. This requires that all moving parts of the linkage pusher should maintain high precision, and any wear and clearance should be maintained. Loosening phenomenon will directly affect the precision of semi-finished products. In addition, the work surface and the platform surface of the paper feeder must be kept in a vertical state; the paper pressure platen should be kept parallel to the surface of the platen in order to achieve a uniform and sufficient working pressure; the blade peak of the paper cutting blade must be kept sharp and the edge angle of the knife edge The size is matched with the degree of softness and hardness of the cut paper, that is, the softer blade angle of the paper is smaller, the angle of the knife blade with harder paper is smaller, and the blade with a stiffer paper blade is selected for cutting. Such as cutting offset paper with 20 ° blade angle blade, cut copperplate paper, laser paper, aluminum foil with 22 ° -25 ° blade corner blade, so that the paper stack can be cut up and down the same specifications, better avoid cutting Deflection skew or "short and long" specification error lays the foundation for improving the precision of the finished product.
Third, the adverse factors of die-cutting equipment exist, caused by the blanking error of the standard paper single-cut semi-finished products after the accurate cutting, the precision of the die-cutting of the finished product mainly depends on the technical control of the die-cutting process, if the equipment is adjusted badly Defects, etc., will affect the accuracy of the finished product, so use MWB-184 die-cutting machine die-cutting the paper, should pay attention to the technical aspects of the operation.
1. The cutting edge of the punching die and the working surface of the paper feeding platform must be adjusted into a parallel state so as to avoid errors caused by the upper and lower punching of the paper stack. When the stack of the paper is pushed by the robot arm to push the platform, the platform moves upwards to move the label toward the knife edge to achieve punching. If the tool edge is not parallel with the working surface of the platform, then when the platform is lifted and punched, the tool edge There is no comprehensive and simultaneous contact with the paper surface, but one section or one side is first contacted and pressed to the corresponding part of the paper. After the punching, the offset paper will produce the layout deviation or the deviation of the upper and lower specification paper. Therefore, in order to ensure the accuracy of punching, the edge of the die edge should be adjusted to maintain a good parallelism with the platform surface so that the entire blade can be brought into contact with the surface of the paper immediately afterwards.
2. The fault of the slitting knife can easily cause deviation of the blanking punch. Dies for die-cutting aluminum foils tend to become blunt. This is because aluminum foils are relatively hard and tough, and wear on the edge of the blade is so large that the edge of the blade is prone to chipping, that is, the blade is cracked. At the same time, the side wall of the knife edge is prone to burrs, causing the punching force to increase, resulting in punching errors. To this end, for blunt or worn dies, we should grind the dies. Without special grinding equipment, we first hold the cylinder's diamond rayon with a pistol-type drill, and the dies on the vise go along the edges. On the outer side wall, the knife edge is roughly ground once, so that the cutting edge is notched and the burr area is trimmed. Afterwards, it is finely ground with the assorted files to smooth the roughened grain. The dressing of the cutting edge should meet the following technical requirements: The cutting edge (tool tip) should be trimmed into a straight line, and it should not be inconsistent. The blade and the inner and outer side walls of the mold should also form a straight line. The slope cannot be ground inside or outside the cutting edge to avoid increasing the punching force. The inner wall of the cutting edge cannot be ground to ensure the punching accuracy of the paper.
3, technical control of the sub-cutter, improve the accuracy of the paper stamping. There are no slitting knives in the center of both lateral sides of the die punch knife. Its role is to cut off the punched waste edge, reduce the resistance of the waste edge paper to the knife edge, and improve the accuracy of the paper cutting and cutting. This job requires that the blade of the cutting knife should be sharp and the height of the knife must be appropriate. If the cutting edge is higher than the cutting edge, it will not only affect the precision of punching, but also the edge of the marking paper after punching will produce burrs; if the cutting edge is obvious Lower than the knife edge, the waste edge is cut off too late, so that the resistance of the knife edge is semi-circular, and the knife edge is easily damaged, and the precision of punching will also be reduced. Therefore, the cutting edge of the slitting knife should be less than 0.5mm, and the punching effect is better.
Fourth, the other factors causing the blanking of blanking paper 1. Punching error caused by bad mechanical parts. When the mechanical pushing paper arm is loose, the operation is unstable, the work surface of the fence type blocking wallboard is uneven, the verticality of the vertical and horizontal parts of the paperboard is insufficient or the position is not suitable, the position of the punching platform is not coordinated with the position of the paper feeding table, etc. All will cause the paper feeding position not to be smooth and affect the precision of punching, and should be carefully observed and analyzed to take corresponding measures and be eliminated.
2. The offset error caused by different paper stacks. Some coated paper due to defects in the papermaking process, resulting in uneven thickness of the paper, when the high stack of parts of the paper due to the first contact with the knife blade, so that the paper stack during the punching process is easy to produce a slight amount of slip, causing Punching error. This should be started from the source of quality checks, from the paper to see the sample, procurement, entry into the library one by one to control the gap, the difference between the thickness of the paper is not used in the spear to avoid the quality problems caused by thick paper.
3. Imperfections caused by imposition are not allowed. The layout of the multi-sheet structure and the vertical and horizontal sizes of the cores must be accurate. This is an important condition for ensuring accurate semi-finished products. The use of artificial imposition of the film layout core, more or less will produce some deviation, so that after the crop semi-finished layout deviation. Therefore, it is best to use a computer to directly print out a single piece of film, so that the precision of semi-finished products can be better guaranteed.
4, stamping error caused by sheet deformation. In the case of variation in printing environmental conditions, printed sheets are also prone to shrinkage changes, that is, elongation occurs in humid climates, shrinkage changes occur in dry conditions, and in particular horizontal edge defects are more severe and will directly affect the score of semi-finished products. Cutting, punching precision. To prevent and reduce the chance of deformation of printed sheets, we must shut off the "moisture-proof, heat-proof, sun-protection, anti-folding or pressure-proof" of good paper so as to avoid deformation. Therefore, the unfavorable effects of moisture and deformation caused by environmental changes after production, packaging, transportation, storage, and unpacking of the paper before printing. By hanging the air, the moisture content of the paper is adapted and balanced with the temperature and humidity of the workshop, which reduces the sensitivity of the paper to the temperature and humidity of the workshop and the moisture of the layout. At the same time, it also requires that the temperature and humidity of the paper storehouse and the workshop should be correspondingly, that is, the room temperature should be controlled at 18°C-22°C, and the humidity should be maintained at about 70%. This is not only to ensure the accuracy of overprinting, but also an important measure to improve the accuracy of finished punching.
In short, through careful inspection of process technology, not only improve production efficiency, but also effectively improve product quality. (Kang Qilai) (From "China Packaging Newspaper and Print Weekly")
Beer logos are usually printed using multi-imposition structure printing. The semi-finished products need to be cut into single-format prints. The process is as follows: First, die-cutting machines are used to directly cut semi-finished products and become single-format finished products; First, the semi-finished product is cut into blanks of a single-format painting with a paper cutter, and then the horizontally-punched blanking machine is used to cut the rough-cut single-version label paper into a whole stack and cut into finished products. From the point of view of production efficiency and quality, the two slitting processes have advantages and disadvantages. The former has better accuracy in points, but the edges of the finished products are prone to burrs and cause adhesions, and do not use automated labeling, and the production efficiency is not high; while the latter punching speed Fast, clean edges make the day a monk hit a day to facilitate automatic labeling, but it is easy to produce blanking specifications. In order to achieve a smooth and automatic paste for the global brewery, our factory uses the latter process to stamp out various beer brands, and has obtained certain experience. Now we classify and analyze some problems that the process is not easy to produce.
First, the single-sheet slitting deviation caused by the squeamish paper is not suitable. The MWB-184 horizontal die-cutting machine is used to punch the beer label paper, and the large-sized semi-finished paper printing paper is first cut into several single-format sheets by a paper cutter. The semi-finished product is drawn, and then the single-sheet semi-finished product is sent to the machine for punching off the diagonal paper stock, which becomes a complete finished product paper. If a large sheet of semi-finished product is not well-trimmed, it will inevitably produce deviations. Therefore, the operation of the entire paper is very important. In other words, when picking up the paper, when both the paper edge and the side paper edge are basically tinctures, the paper stack should be lifted up and then the bite paper edge should be reclaimed to avoid red side storage. In the case of a skewed shape, when the two corners of the skewer are aligned, the skewed condition will occur when the monk knocks on the edge of the paper to make a day. This will cause deviations in the printed sheet layout with a skewed edge, resulting in finished products after trimming. Deviations will also occur. Based on this situation, if the first knife is cut, the side edge paper edge and the paper feeder of the paper cutter are aligned in parallel, and the edge of the paper edge should be aligned to the wall plate before being cut. In this way, cutting the first knife is more accurate, and afterwards, each knife is also relatively accurate. Single-cut semi-finished products can be cut accurately, and the finished product die-cutting precision can be reliably guaranteed.
Second, the poor precision of the paper cutting machine caused by the semi-finished products can not accurately identify the semi-finished products will not directly affect the accuracy of the finished product slitting, so the paper machine between the wall plate and the paper feeder angle must be adjusted to a right angle, that is 90 ° Hold state; the specification of the cut of the pusher at each stroke is absolutely the same as the cut size displayed on the machine. This requires that all moving parts of the linkage pusher should maintain high precision, and any wear and clearance should be maintained. Loosening phenomenon will directly affect the precision of semi-finished products. In addition, the work surface and the platform surface of the paper feeder must be kept in a vertical state; the paper pressure platen should be kept parallel to the surface of the platen in order to achieve a uniform and sufficient working pressure; the blade peak of the paper cutting blade must be kept sharp and the edge angle of the knife edge The size is matched with the degree of softness and hardness of the cut paper, that is, the softer blade angle of the paper is smaller, the angle of the knife blade with harder paper is smaller, and the blade with a stiffer paper blade is selected for cutting. Such as cutting offset paper with 20 ° blade angle blade, cut copperplate paper, laser paper, aluminum foil with 22 ° -25 ° blade corner blade, so that the paper stack can be cut up and down the same specifications, better avoid cutting Deflection skew or "short and long" specification error lays the foundation for improving the precision of the finished product.
Third, the adverse factors of die-cutting equipment exist, caused by the blanking error of the standard paper single-cut semi-finished products after the accurate cutting, the precision of the die-cutting of the finished product mainly depends on the technical control of the die-cutting process, if the equipment is adjusted badly Defects, etc., will affect the accuracy of the finished product, so use MWB-184 die-cutting machine die-cutting the paper, should pay attention to the technical aspects of the operation.
1. The cutting edge of the punching die and the working surface of the paper feeding platform must be adjusted into a parallel state so as to avoid errors caused by the upper and lower punching of the paper stack. When the stack of the paper is pushed by the robot arm to push the platform, the platform moves upwards to move the label toward the knife edge to achieve punching. If the tool edge is not parallel with the working surface of the platform, then when the platform is lifted and punched, the tool edge There is no comprehensive and simultaneous contact with the paper surface, but one section or one side is first contacted and pressed to the corresponding part of the paper. After the punching, the offset paper will produce the layout deviation or the deviation of the upper and lower specification paper. Therefore, in order to ensure the accuracy of punching, the edge of the die edge should be adjusted to maintain a good parallelism with the platform surface so that the entire blade can be brought into contact with the surface of the paper immediately afterwards.
2. The fault of the slitting knife can easily cause deviation of the blanking punch. Dies for die-cutting aluminum foils tend to become blunt. This is because aluminum foils are relatively hard and tough, and wear on the edge of the blade is so large that the edge of the blade is prone to chipping, that is, the blade is cracked. At the same time, the side wall of the knife edge is prone to burrs, causing the punching force to increase, resulting in punching errors. To this end, for blunt or worn dies, we should grind the dies. Without special grinding equipment, we first hold the cylinder's diamond rayon with a pistol-type drill, and the dies on the vise go along the edges. On the outer side wall, the knife edge is roughly ground once, so that the cutting edge is notched and the burr area is trimmed. Afterwards, it is finely ground with the assorted files to smooth the roughened grain. The dressing of the cutting edge should meet the following technical requirements: The cutting edge (tool tip) should be trimmed into a straight line, and it should not be inconsistent. The blade and the inner and outer side walls of the mold should also form a straight line. The slope cannot be ground inside or outside the cutting edge to avoid increasing the punching force. The inner wall of the cutting edge cannot be ground to ensure the punching accuracy of the paper.
3, technical control of the sub-cutter, improve the accuracy of the paper stamping. There are no slitting knives in the center of both lateral sides of the die punch knife. Its role is to cut off the punched waste edge, reduce the resistance of the waste edge paper to the knife edge, and improve the accuracy of the paper cutting and cutting. This job requires that the blade of the cutting knife should be sharp and the height of the knife must be appropriate. If the cutting edge is higher than the cutting edge, it will not only affect the precision of punching, but also the edge of the marking paper after punching will produce burrs; if the cutting edge is obvious Lower than the knife edge, the waste edge is cut off too late, so that the resistance of the knife edge is semi-circular, and the knife edge is easily damaged, and the precision of punching will also be reduced. Therefore, the cutting edge of the slitting knife should be less than 0.5mm, and the punching effect is better.
Fourth, the other factors causing the blanking of blanking paper 1. Punching error caused by bad mechanical parts. When the mechanical pushing paper arm is loose, the operation is unstable, the work surface of the fence type blocking wallboard is uneven, the verticality of the vertical and horizontal parts of the paperboard is insufficient or the position is not suitable, the position of the punching platform is not coordinated with the position of the paper feeding table, etc. All will cause the paper feeding position not to be smooth and affect the precision of punching, and should be carefully observed and analyzed to take corresponding measures and be eliminated.
2. The offset error caused by different paper stacks. Some coated paper due to defects in the papermaking process, resulting in uneven thickness of the paper, when the high stack of parts of the paper due to the first contact with the knife blade, so that the paper stack during the punching process is easy to produce a slight amount of slip, causing Punching error. This should be started from the source of quality checks, from the paper to see the sample, procurement, entry into the library one by one to control the gap, the difference between the thickness of the paper is not used in the spear to avoid the quality problems caused by thick paper.
3. Imperfections caused by imposition are not allowed. The layout of the multi-sheet structure and the vertical and horizontal sizes of the cores must be accurate. This is an important condition for ensuring accurate semi-finished products. The use of artificial imposition of the film layout core, more or less will produce some deviation, so that after the crop semi-finished layout deviation. Therefore, it is best to use a computer to directly print out a single piece of film, so that the precision of semi-finished products can be better guaranteed.
4, stamping error caused by sheet deformation. In the case of variation in printing environmental conditions, printed sheets are also prone to shrinkage changes, that is, elongation occurs in humid climates, shrinkage changes occur in dry conditions, and in particular horizontal edge defects are more severe and will directly affect the score of semi-finished products. Cutting, punching precision. To prevent and reduce the chance of deformation of printed sheets, we must shut off the "moisture-proof, heat-proof, sun-protection, anti-folding or pressure-proof" of good paper so as to avoid deformation. Therefore, the unfavorable effects of moisture and deformation caused by environmental changes after production, packaging, transportation, storage, and unpacking of the paper before printing. By hanging the air, the moisture content of the paper is adapted and balanced with the temperature and humidity of the workshop, which reduces the sensitivity of the paper to the temperature and humidity of the workshop and the moisture of the layout. At the same time, it also requires that the temperature and humidity of the paper storehouse and the workshop should be correspondingly, that is, the room temperature should be controlled at 18°C-22°C, and the humidity should be maintained at about 70%. This is not only to ensure the accuracy of overprinting, but also an important measure to improve the accuracy of finished punching.
In short, through careful inspection of process technology, not only improve production efficiency, but also effectively improve product quality. (Kang Qilai) (From "China Packaging Newspaper and Print Weekly")
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