The best choice of carton printing die cutting

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Analysis: the best choice for carton printing die cutting

flexographic printing linkage processing line has been more and more used in folding carton processing, and has become the fastest-growing printing processing method, which has brought great impetus to the development of carton processing industry. Even in some regions with the slowest growth of carton processing market, there has been a great development

up to now, there are still some processors who do not think that post press processing such as die cutting, waste discharge and molding processing is a crucial part of flexographic printing production. However, only after die cutting, waste discharge and molding processing, the carton can have actual packaging and transportation performance, and can be called a real practical packaging. Imperfect post press processing actually makes perfect printing meaningless

up to now, there are still many factors restricting the processing efficiency of carton processing plants. For example, whether to use sheet fed or web fed, whether to use circular die cutting or flat die cutting, whether to use online die cutting or offline die cutting, all directly affect the production capacity of the whole factory, the interests of the enterprise and the ability to serve customers

comparison between sheet fed paper and web paper processing

in the carton processing industry, the processing technologies that still occupy a large market share are sheet fed paper, multi machine offset processing, flat pressing and flat die cutting. Its technological process is:

paper roll sheet paper Pause Printing pause rush pause die cutting pause waste disposal after carton processing

evaluate from the aspects of capital investment and labor cost. If you still operate a carton processing plant in this mode, you will certainly face great pressure

therefore, if the existing sheet fed carton processors want to take the lead in the competition, they can only take two ways: one is to achieve the highest possible production speed with the existing equipment; Second, realize low-cost production under mass processing, such as processing a variety of cartons of different specifications together

the high equipment investment cost, time-consuming printing conversion and the difficulty of managing multiple groups of processing equipment at the same time, especially the difference in speed matching between printing and post press processing, are constantly reducing the proportion of sheet fed offset printing + flat press die cutting in carton processing

the typical flexographic printing line processing process is the mode that the web material directly enters the printing part, and then outputs the processed finished products from the other end. Its process flow is:

paper roll printing + die cutting processed cartons

obviously, this production method reduces capital investment, die cutting consumption and labor input, and shortens the time for finished products to reach customers. This is very different from the multiple processing procedures of repeatedly getting on and off the machine in the processing of sheet fed cartons

after realizing this difference and considering the requirements of processing period, the following results can be compared: offset printing requires five sets of printing equipment, while 1. The permanent deformation and temporary deformation of leaf spring after strong pressure treatment should not be greater than 0.5mm, and only one set of printing brush equipment is required for flexographic printing; Offset printing requires 6 processes, while flexographic printing requires only 2 processes; Offset printing ultimately requires 10 ~ 12 workers, while flexographic printing only requires 2 ~ 3 workers. The advantages and disadvantages of craftsmanship are obvious

comparison between round die cutting and flat die cutting

whether it is sheet fed or web printing, if flat die cutting is equipped, there will be some defects in the subsequent processing. Therefore, the choice of die-cutting process has become the second important determinant in carton processing

although the price of circular die-cutting die is still higher than that of flat die-cutting die, the gradual reduction of the price of circular die-cutting die and the gradual improvement of its reliability have expanded its popularity. So far, more and more carton processors have realized the advantages of the round pressing die-cutting processing method, which is mainly reflected in the recognition of higher average processing speed, the similarity and consistency of processing technology (rotary printing + round pressing die-cutting), lower investment and simple and fast preparation

in terms of equipment investment, the price of a flat die-cutting machine is enough to buy multiple round die-cutting machines. Although the price of the round pressing die-cutting plate is slightly higher, its investment can be postponed. Only when a special carton processing order is actually received, the mold needs to be purchased. Furthermore, the modern round pressing die-cutting plate has been manufactured very accurately, so that in order to let more industries know about this kind of material previously only used for spectacle lenses, this work is extremely large. If you suspect that the detector has caused noise, some pre press preparations are completed in the mold processing plant, and the preparation of the die-cutting plate, hollowing out, and sticking indentation strips no longer exist in the printing enterprises, Printing enterprises only need a thin piece of double-sided tape to stick the plate, which actually reduces the cost

of course, the most important of all factors is still productivity. Compared with the linkage flat die-cutting process, the production efficiency of circular die-cutting is much higher. After successfully adopting new methods such as reducing cutting blank, the successful factor of carton processing and production is the processing quantity per unit time, that is, how to improve production efficiency. Although the combination of flat die cutting and web printing process also has a higher processing speed, the higher equipment maintenance cost, the difficulty of die cutting waste discharge and the difficulty of registration make the actual processing and production capacity inferior to that of circular die cutting

of course, circular pressing and die cutting are not omnipotent. The processing and production of small cartons with large format printing still has advantages by adopting the flat pressing and die-cutting process, which in some aspects even exceeds the processing capacity of narrow width rotation + circular pressing and die-cutting process

it should be noted that there are many types of circular pressing and die-cutting equipment, which requires a wealth of knowledge to make a successful choice

solid die-cutting plate and magnetic die-cutting plate

solid die-cutting plate of steel alloy has been the most important die-cutting plate used in circular die-cutting for nearly 20 years. In the past, the price of die-cutting plates was expensive. Considering that the carton processors should continue to maintain their competitive advantage, the mold price has been significantly reduced in recent years, almost to the point that the carton processors no longer need to consider too much. The mold manufacturing and processing technology has also been advanced to the point that it can be delivered in a few days (it may take a few weeks in the past, and even a few months for large molds). The processing accuracy of the mold is also getting higher and higher, and all die cutting processing preparations have been completed before the mold is delivered

although the mold manufacturing process is constantly reducing the cost of the mold, there are still some deficiencies for some carton processors and some production conditions. In order to make up for this as soon as possible, the mold manufacturer accelerated the development of flexible die-cutting plates, namely magnetic die-cutting plates. It uses a magnetic roller to fix the die-cutting plate

the development of magnetic die-cutting plate is very rapid, mainly because of its low price. The price of a set of magnetic die-cutting plates is only about 25% - 30% of the price of a set of solid die-cutting plates. Through its application in recent years, magnetic die-cutting plate has established its position in the processing of ultra small amount of cartons. Especially when the carton processor is not sure whether a certain carton can be processed and produced in large quantities, it can be applied to the trial production of carton samples, test articles, etc. In general, if the carton processor can reasonably calculate the production of less than 8million cartons per year, it can completely use the magnetic die-cutting plate. When the output of the year is more than 8million cartons, it is more suitable to use the solid die-cutting plate

two differences should be noted here. First, the die-cutting processing of most magnetic die-cutting plates requires an auxiliary process or a waste discharge box, which is different from the processing of solid die-cutting plates. The solid die cutting plate has been equipped with an integrated pin type waste discharge part, so it has advantages in simplicity, reliability and processing speed; Second, the magnetic die-cutting plate cannot be reground after the passivation of the die-cutting blade, while the solid die-cutting plate can be reground 3 ~ 5 times after the passivation of the normal die-cutting blade. This is why we choose different die-cutting plates based on the processing quantity of 8million cartons mentioned above

future development trend

with the application of some innovative technologies, the resistance of carton processors who have been used to the old processing mode of sheet fed offset printing + flat pressing and die cutting to the new changes is the biggest obstacle to the application of flexographic printing + circular pressing and die cutting. Up to now, a considerable amount of funds have been invested in old-fashioned processing equipment and traditional carton processing 9 The gap between the oil delivery valve damping pin and the damping hole is too small, and some major equipment suppliers keep reminding each carton processor what to do. However, they often do not understand the market pressure and enterprise demand faced by carton processors. Only new technologies that meet the future needs of carton processors will urge them to carefully understand the new processing mode

flexographic printing equipment suppliers and manufacturers of round pressing and die-cutting equipment have realized that based on common long-term interests, both sides should cooperate with each other to complete the alternation and transition of new and old equipment and processes as simply and smoothly as possible. Once carton processors understand the advantages of the new production process, they will understand and learn from various channels, from learning the theory of flexographic printing processing to learning to correctly install magnetic die-cutting plates

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