Carton After Road Technology - Grasping Five Factors

If you want to improve the printing quality, you must first clarify the problems that are likely to occur during the carton printing process and the customers' use. Based on these two aspects, we conducted preliminary statistics and investigations and found that product defects and customer complaints were concentrated in: running version, inaccurate printing, large chromatic aberration, dew-white, stencil, ghosting, graphic distortions, missing strokes, Overprinted bottoms, graphic depressions, bleeding edge prints, misaligned symmetric versions, dirty plates, and more. There are a lot of problems related to the problems. To comprehensively improve the quality of carton printing, it is necessary to systematically solve people (members), machines (devices), (materials) materials, (side) methods, and environmental (environmental) And other issues.

Human factors

Human factors mainly focus on two aspects: quality awareness and technical skills.

Both of these are inseparable from the education and training work. It is very important to establish a good sense of quality and high quality. Some companies often focus on production and efficiency, neglecting the training and education of employees' quality consciousness. There are many large-scale enterprises in China that have subordinate enterprises or member companies or subsidiaries that are specialized in producing packaging for them. These packaging companies always feel that it is better to rely on the trees to enjoy the cool weather and to see the production efficiency in one eye and to see the operating profits in one eye. Defective products are also fools, employees have a good quality does not matter. With the pace of zero defects in goods, the era of zero defects in the packaging of goods will follow. Enterprises that do not raise their awareness of quality to a certain level will eventually fall into the open tender procurement and fierce competition.

Printing is a relatively special process. Actually, the technical skills of the employees are critical. It is not like the nail packing process. It is OK to learn. The difference between the novice and the old staff is only the degree of proficiency. Personnel management in the printing process must focus on skills and focus on team building. The better management solution that we have seen so far is: Each crew is divided into a class leader, a first assistant worker, and a second assistant worker according to technical skills. The team leader is responsible for organizing management, seeing samples, and adjusting machine work. The first assistant worker is responsible for hanging plates, inking, and adjusting the slitting size. The second helper, 1-2 people, is responsible for the work of boarding, carrying prints, etc. Usually the level of wages and the scale of rewards and punishments are gradually reduced by the team leader, the first assistant, and the second assistant.

Human factors are a key factor in improving product quality and are a variable factor. The role of human beings is good, and the quality of printing will be guaranteed; if the problems of people are not resolved well, it is harder to improve the quality of printing.

Machine Factors

The factors of the machine should pay attention to the timely inspection and inspection of hidden dangers, and do not take sick jobs; maintenance, maintain equipment capabilities (precision, flexibility). Carton printing equipment, the focus of inspection parts are the pusher plate is parallel, the line speed between the groups are the same, the ink roller is balanced, the anilox roller is clean, with no wear and so on.

Equipment is a weapon, and sophisticated equipment should pay more attention to maintenance. It cannot be judged only by the efficiency of production. It is necessary to let the horse run and allow the horses to graze.

Material factor

The main factors of materials are offset, corrugated board, ink, auxiliary materials (plate lining, brush, double-sided adhesive, and even wiper cloth, etc.).

The hardness, thickness, elasticity, ink amount, and graphic height of the offset plate all directly affect the quality of printing. Therefore, according to the different prints, choose the appropriate offset. If you just print a simple text, you can choose a rubber with a lower hardness and a lower price. If you print finer text or patterns, choose a rubber that is slightly more flexible and thinner. If you are printing a large area of ​​graphic, be sure to choose a good printing ink. Printing quality requirements are relatively high, the best choice for resin flexo. At the same time, the plate-making needs to be rationally adjusted according to the process requirements. For example, the height of the engraved (carved) plate and picture and the higher picture and picture will easily cause the network to expand and deform, and the picture and text are relatively low, which may easily cause the paste network.

Corrugated board flatness, paper cleanliness, smoothness and corrugated type will affect the printing effect. The warped cardboard will definitely cause printing or grooved running, and even paper feeding difficulties. If warp-printed paperboard is printed, it is necessary to fold the front end of the feed paper first, increase the suction and feed roller pressure, and adjust the printing roller and grooved roller in time according to the warpage direction. The printing union identified the direction of misalignment before and after the paper feed. If the corrugated board with a very serious warpage is warped, it is better not to print first, and then put three or five sheets of cardboard back and forth. The cardboard should be flattened and then produced, so as to avoid causing a large number of defective products. Therefore, the upper process should pay attention to the adjustment of paperboard moisture. Providing high flatness is the primary condition for improving the printing quality. At the same time, it should be noted that the trimming edge must be smooth and clean, otherwise it will produce a lot of paper, causing printing problems.

At present, there are usually two types of facial papers to choose from: one is a coated paper with a higher surface smoothness, and the other is a panel with a rough surface. When printing high-grade coated paperboards, it is necessary to reduce the pressure and reduce the speed to prevent slippage. At the same time, it is not necessary to choose inks with higher viscosity. Otherwise, it will not only cause problems with pulling the hairs, but also cause stickiness due to slow drying speed, and the use of alcohols or fast. Dry solvents are formulated. Hanging panel paper with slightly poor surface smoothness is not easy to print, resulting in problems such as whitening and pinholes. At the same time, the cardboard production line should prevent the transparent paper from absorbing water due to the strong absorption of the liner paper. In this way, the printing plate cannot fully contact with the paper, the ink cannot be fully spread, the connecting material cannot fill the paper texture, and the problem of missing printing occurs.

The good ink should be consistent with or similar to the standard sample, fine particles, proper viscosity, good affinity after adding water or alcohol solvent, no precipitation and agglomeration. Choosing a stable quality ink or a self-aligning ink with a pure color scheme is the key to reducing the chromatic aberration of prints.

The best materials will bring the highest cost, but it will not necessarily bring the best printing quality. Only the best materials will have the best printing effect.

Law factors

The main factors of the method are the pre-press design and process control and management.

Prepress design should not only strive for perfection, but more importantly, it must be consistent with the printing process. After all, carton ink printing is different from lithographic offset printing. The design of carton printing should fully consider its own equipment precision and personnel capabilities. The dot number is not as high as possible. Obviously, only 100 or 150 lines can be printed, but it is designed to be 200 lines. , it is simply not printed. The prepress design layout graphic should not be overcrowded and slender, and the lines and patterns must be rounded to avoid spiky corners, causing graphic distortion during printing. At the same time, due to the limitation of carton letterpress printing pressure on printing, large-scale real-time and fine-texture should be avoided when designing layouts. Otherwise, printing or distortion may be caused. If it is unavoidable, two plates can be made and printed on different rollers, but this will reduce the number of printing colors.

The printing operation process must strictly abide by the operating procedures. Because printing is a process in which the whole body is involved, it is very meticulous and accurate. While observing the process regulations, we must pay attention to innovation and improvement. Without innovation, there will be no progress. Without improvement, there will be no improvement. In particular, innovative ideas and suggestions for improvement of front-line staff are very practical. For example, we once had a batch of single, bleeding version designs, but due to the unsmoothness of the cardboard trimming caused by the slitting knife, the edge of the cardboard is printed at all (in fact, many packaging boxes have such bleeding or docking design ). After researching, we adopted the suggestion of downsetting proposed by the staff. We faced the version, adjusted the paper feed direction, and pressed forward from the bottom of the box. The curled up edge could be printed in place.

Ring factor

The environment is divided into two environments: the natural environment and the concept of quality atmosphere.

The natural environment is often difficult to overcome and can only be improved through certain measures. For example, the climate in the northern and southern parts of the country is dry in the winter and spring, and cardboard quickly loses moisture after it goes offline, causing warpage and bursting. The problems can be alleviated by improving the glue formulation, appropriately reducing the hot plate vapor pressure or improving the pressure lines. In summer, the climate is humid, especially in the rainy season in July and August. The cardboard is soft and the pressure resistance after printing is obviously reduced. The problem can be solved by using additives in the glue and adopting manual dehumidification.

There is also a soft environment issue with a quality atmosphere. Because of the quality of the carton, it is not enough to just grasp the printing process. Any link may affect the printing effect. Therefore, it is necessary for all processes to fully grasp the quality of work, which requires a good quality atmosphere. Some companies have very close quality links between processes, and have a very detailed quality supervision system, so that the management system is basically the same, some places are called "rejected products buy back system", and some places are called "buy buyout system" Wait. These are good ways to actively promote and promote a quality atmosphere.

Carton printing may seem complicated, but it is also simple. As long as people, machines, materials, methods, and rings are well grasped, printing good products is very realistic. It is not difficult to print a batch of products, but it is difficult for them to print well. This is exactly what the vast majority of carton peers have to study.

Source: Corrugated Box