Carton cutting process technology

October 29, 2019

Dust and loose fibers are terms used in flat plate and die cutting to describe the damage to the die-cut edge of a carton. In practice, the term means the production of loose particles and fragments, as well as the accumulation of fiber filaments, which adhere to the die-cut edges of the paperboard printing alliance. It should be noted that most of these particles and fibers come from die-cut cardboard surface printing tools. This raises three issues:

1. How to flatten die cutting process?

In order to accurately describe the flattening and die-cutting process using a steel die-cutting die, this process will be defined as a moving process, which consists of two progressive steps forming the printing technology. The first step is called "blast penetration" and the second step is called "blast separation" equipment consumables.

In the simultaneous die-cutting process, the full length of the die-cutting blade contacts the surface of the die-cut material in contact with the device consumables. When die-cutting, the die-cutting blade exerts pressure on the paperboard material to print in the middle. Although we describe die cutting as a cutting process, it is more accurate to say that this is a process material market in which cardboard is broken under pressure. When the tool is drilled into the cardboard to move closer to the anvil pad, the cardboard surface is squeezed, stretched, and compressed into equipment consumables. Finally, the cardboard surface was unable to withstand the effects of these pressures, thus breaking the printing technique in a "blast-through" manner.

The use of the word “blasting” to describe the breakage of the paperboard surface is most accurate, however, because the sharp edges of the paperboard cause a strong stretching and compressive force on the paperboard, thus causing the surface of the paperboard along the die cutting edge to collapse in central China. After the cardboard surface has cracked, the sharpness of the die-cutting blade is not as great as that of the previous step, because the double bevel of the cutter wedge converts the pressure in the vertical direction into the horizontal moving force printing alliance. When the tool penetrates into the board, the beveled face of the tool pushes the board vertically to both sides of central China.

Under strong fracture pressure, the cardboard was completely torn off the printing alliance before the cutter and the anvil pad contacted. This "blast separation" process is divided into surface cracking, tool wedging, and paperboard fracture in central China. Even under backward production conditions, as long as equipped with sharp steel cutters, smooth liners and optional die-cutting system, the cardboard still breaks the middle print under strong burst pressure.

2. What caused dust and loose fibers?

What causes dust and loose fibers? Dust and loose fibers are caused by damaged die cutting edges. The excess force causes the blades to hit the surface of the liner board printing market. As a result, the blade edge becomes wider, so that the pressing force and the stretching force applied to the surface of the cardboard greatly increase the equipment consumables. The cardboard is further compressed and the tension is slowly increased until the cardboard breaks the equipment consumables. This process was overpowering and produced fragments and "dust" molecular printing alliances.

As the pressure on the tool increases, further compressive forces cause the blade to dull the printing tool. The cardboard was compressed and stretched beyond the normal range and its surface was broken into three printing tools. From the description of this process, we can conclude that dust and loose fibers come from the surface of the cardboard. The reason for this is the gradual deterioration of die cutting edges.

3. How to avoid the generation of dust and loose fibers?

The way to avoid this problem is to maintain the good condition of the steel blade equipment consumables. There are several ways to choose from. Actual operation can use one of them alone, or you can use multiple methods at the same time.

These methods are: using soft or "small thickness" die-cut liners; calibrating flat-plate die cutters to prevent excessive force; calibrating and balancing die-cutting tool pressures to ensure accurate "Z-axis control" of the cutting edge The use of "floating knife" for the important tools in the production planning; Accurately integrate the double board and area repair technology into the joint repair process, so that the pressure is evenly cut in central China.

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