Die cutting accuracy guarantee
Carton roller die cutting is in the upper and lower drum outside the diameter of the cutting point generated around the contact surface is very small, the drum knife and pad pressure is very large. In order to ensure the accuracy of corrugated carton die cutting, we should do the following.
Selection of equipment
The precision and efficiency is an important index to measure the rotary cutting machine, die-cutting indentation position is not accurate, is mainly due to the equipment performance and manufacturing precision caused by the irrational factors such as the selection of machining error accumulation there are operation and before operation and related materials.
Paper feeding system for domestic first generation rotary die-cutting machine is a chain manual paper feeding, cutting accuracy at 3 5mm, can only adapt to the low precision die-cutting products. The second generation semi automatic die-cutting machine, generally use the "push plate reciprocating" feeding equipment, precision die-cutting manufacturing level should be controlled in the + 1mm, but the product are "scared incision" problem. Domestic third generation automatic rotary die-cutting machine, precision control technology and equipment have greatly improved, cutting precision can be controlled within 0.5mm, can meet the high precision requirement of carton. Some equipment adopts the "forward feed" technology, which not only improves the accuracy and speed of paper feeding, but also enlarges the range of application. It can meet the requirements of "double faced cardboard" and "ultra thin cardboard" and "curved cardboard".
Rotary die cutting machine is mainly used at home to Taiwan, Europe and the United States and domestic equipment, in the selection of the equipment to find a balance between quality, price and service three, pay attention to the configuration of the machine, especially the drum bottom pad automatic repair device and line speed automatic compensation device, and the lower roller lifting pneumatic control the device configuration and not every machinery manufacturers have to purchase, repeated comparison. The machine must at the same time the machinery manufacturers customer service service system to carry out the necessary understanding, good customer service service system is to ensure the effective use of the unit factors of normal use of the machine, but also reduce the production cost and improve the efficiency.
Use a durable die cutter
The high quality of the cutting knife can not completely avoid cutting and frequent shutdown of ATC operation, the steel cutting blade closely, resilient, hard, can withstand 100 thousand blade quenching even millions of times. Choose the cutting knife not only pay attention to the brand, but also pay attention to, with the cutter tooth number and the corrugated cardboard thickness of the thicker paper, number of teeth to less, so you can make the cutting pressure required for proper cutting knife height to fit the high knife will increase unnecessary pressure, make the knife mold and bottom pad life expectancy.
Wear the bottom rubber pad
Carton printing and molding is a continuous process, the carton roller die cutting is different from lithography die cutting. Lithographic die-cutting, not much difference with the carton size of the die size, while the drum cutting is different, only in the upper and lower roller line speed, to ensure the cutting accuracy of the carton size, but the drum bottom pad is worn, is bound to have a linear velocity difference, so that the carton size small, so the bottom pad has good abrasion resistance, so as to delay the arrival of this difference.
Automatic repair and compensation device
Roller die cutting, in ideal circumstances, the surface speed of the die, the surface speed of the bottom roller and the running speed of the corrugated board should be consistent. But in the traditional roller die cutting, this situation only exists for a short time, that is, when the pad is completely free of wear and tear, the upper and lower rollers operate at the same speed as 1:1 in theory. But as the base rubber pad wears down, the diameter of the bottom roller will decrease gradually, which will cause the change of the surface speed of the bottom roller, and finally lead to the shortening of the carton length. This phenomenon in a cardboard cut of two or more when the carton is particularly evident, after a carton will Qiedebi first short. In practice, some die makers make the second version longer to compensate for the difference in size between the front and the rear. The automatic repair device of the roller bottom rubber pad and the automatic compensation device of line speed can reduce the error.
Such as DICAR through an equalizer speed control system of drum bottom surface, reduce the error, the bottom pad of the system is not directly covered on the bottom on the drum, but the first set in the bearing sleeve, regardless of bottom pad diameter changes, because the bearing can freely slide on the bottom of the drum, thereby the bottom pad surface speed completely controlled by the die, improve product precision die-cutting.
Use high quality sponge gel
The drum cutting is completed in a smaller range at around two drum and a relatively short period of time, sponges are compressed in a short period of time, which requires the drum knife mold on the rebound rubber has better elasticity and durability, but some manufacturers all rebound sizing quality is not good, the waste cleaning operation the speed of the machine, and the cutting quality is affected by. In the roller cutter, when the two blade is very close to the middle of the sponge material, more should pay attention to, because the ordinary sponge pressed, will greatly expanded to both sides, on both sides of the extruded steel blade, cutting quality and die life is affected, so the carton cutter should as far as possible choose high quality sponge glue.
Send paper accurately
In the manufacture of corrugated boxes, paper feeding process is very important, the right to transfer cardboard printing and die cutting and other issues, if the feed will produce deviation, such as printing misregister, color shades, die-cutting and creasing problems such as location deviation. Die cutting work in the equipment at high speed, corrugated cardboard and mold movement of the state, and if the trajectory is not good, it is easy to produce errors. In order to achieve the die cutting accuracy, it is difficult to achieve the quality standard without the mechanical logic of the paper feeding technology.
Basic knowledge of operating personnel should understand the mechanics, to be able to balance various forces to control the board movement in the system, so that the board in the motion trajectory of stable, keep straight, without moving with constant velocity, acceleration and deceleration and offset. To adjust and control the working state of the paper feeding system. Every production preparatory work in addition to the adjustment of the tools must be done, must carefully examine and adjust the paper feeding system, especially to be adjusted for each row of the feeder and keep it in a line, not before and after the error. Operation must be serious, focused, accurate action.
Indentation processing is the last process in the production of carton, affect the production and processing of the front line error is large, such as cardboard size error, uneven thickness, cardboard warping, board drying and printing error and other factors, these factors have some uneven thickness, such as cardboard can die machine adjustment, especially the function of configuration related to solve some problems, but only through the error adjustment before the procedure to solve. High quality carton products are the result of the whole process, and each process has problems that will affect the final quality of the product. People are the main body of production, technical level of employees, the quality is directly related to the quality of products, enterprises in addition to the introduction of high-quality technical personnel, we should focus on the strengthening of the relevant technical training for employees to improve their skills and qualities. Of course, the use of die-cutting equipment and related supporting materials is also a guarantee of high quality products.
Only the production and management to carton production as a whole, from scratch, pay attention to each link, can guarantee the processing after the road smoothly, to ensure the cutting quality, in order to produce high quality carton products.
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