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Die cutting is a key step in the processing of carton, how to ensure the quality of die-cutting is very concerned about the issue of printing. At present, the main problems faced by the carton printing factory is that the time of the printing plate is long, the printing accuracy is poor, the quality of the die cutting is not good, the paper hair is too much, the connection point is too large, the irregularity of the trace line, the production speed is slow, and the rejection rate is high. Wuhan Dongsheng paper products Co., Ltd. will solve these problems one by one for the printing plant to answer.
Problem one: change version time
Preparation before the change to do a good job. The use of the center line of the device as a benchmark, you can easily and accurately set the die cutting tools, including the full size of the die - cutting version, the pre - installed templates, etc.. At the same time, the machine is installed outside the machine, the fine-tuning of the machine also makes the adjustment time of the product is further reduced. In a good management system, usually repeat product version time, including automatic cleaning, can be completed within 30 minutes.
Problem two: the poor accuracy of printing
At present, the requirement of high quality of printed products is increasing, and the design of the packaging box is becoming more and more complex. Complex box type is also a corresponding increase in the quality of die cutting precision, error range keep + 0.15mm, you must use the die-cutting machine is qualified, and we should pay attention to the adjustment steps, especially paper and paper before the arrival of the time.
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Problem three: poor quality and paper cutting
Low quality cardboard, such as recycled cardboard, making die cutting process more difficult. In order to achieve a better die cutting quality, the operator must find out the correct method of preparation, especially the bottom of the method, can gradually increase the pressure and the region to maintain the pressure of the die cutting knife sharp. For the use of a lot of knife line products, balance knife version is very important, this can significantly reduce the pressure of time. In addition, according to the requirements of different products, such as typesetting, cardboard quality, etc., to choose different hardness of the bar.
Problem four: too much connection point
The end user of the carton always requires a smaller and smaller connection point, while the manufacturer always makes the machine run faster, thus increasing the difficulty of the operator. In order to reduce the difficulty of connection point should be in force, use wire grinding machine, the use of hard rubber or cork in the need to make the connection point of the knife edge to prevent the connection point of fracture, this connection point can be smaller and less.
Problem five: irregular traces
In view of the needs of the folding carton, the carton must have a good indentation line. More importantly, when the boxes are run on the automatic packaging machine, the power of the opening must be consistent. In this way, the selection of the appropriate type of indentation line is the basic elements. According to the thickness of the paper, select the height and width of the line, the line will be suitable for bonding on the die plate, indentation can achieve higher quality and easy to break the box.
Problem six: slow production
Many carton printing machine die cutting machine speed is relatively low, such as 2000 ~ 3000 / hour, and some of the die-cutting machine die-cutting speed can be as high as 7000 ~ 7500 hours. The use of modern automatic die cutting machine, the operator is easy to achieve the highest production speed. Optimize the production speed by using the tools recommended by the equipment manufacturer. In addition, the product can achieve high quality.
Problem seven: high rejection rate
Most of the printing waste rate is usually high. There will be some scrap at the beginning of the die cutting, which can be reduced by using the right tools and the right steps. In the process of operation, the waste is produced by stopping and blocking paper. The correct adjustment and accurate tool preparation can reduce the reject rate. In addition, the removal of waste will increase the waste rate and reduce profit margins.
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