Corrugated cardboard box die cutting, indentation process points (in)

<Indentation Steel Wire Thickness Control >

It is important to control the actual thickness of the indented steel wire. If an indentation steel wire with a large thickness tolerance is selected, loading on the die plate will collapse on one side, causing a series of problems: the position of the indentation deviates from the design position The shape of the carton is changed; the folder of the folder is jammed; the glue on the bottom of the template is opened and displaced; the height of the indentation is reduced, and the indentation is too shallow; the indentation of the steel wire is loosened or even shedding.

<Indentation Steel Wire Height Control >

The height of the indentation steel wire is calculated based on the height of the insert and the thickness of the material being die-cut. For the paper with good tensile strength, a higher-value indentation steel wire can be used. When the paper is brittle, the pressure needs to be reduced. Trace steel wire height. In actual production, although the height of the indentation steel wire installed on the die-cut plate is strictly calculated and corrected, the indentation is always not in place, often a batch of shallow, a batch of deep, must be constantly adjusted in the die-cutting .

Circular die-cutting has a larger retractable space, making it easier to choose the height of the indented steel wire. In general, the horizontal indentation steel wire is slightly higher than the circumferential indentation steel wire.

< Indentation groove design >

The inside of the indentation groove is cut into oblique angles, and the corrugated board will not be torn, and some corrugated box packagings with anti-leakage requirements can effectively solve the bursting phenomenon caused by corrugated board indentation.

<Quality requirements for indentation>

All indentations must be neat, flat and bent, and not cracked.

The bending is closely related to the depth of the indentation. The pressure is too shallow and the bend does not come. Pressing too deep can cause fracture. The correct depth depends on the hardness of the cardboard. The impression of the male mold must be in the middle of the female impression.

The flap indentation is easy to bend and the tissue cannot be broken. The indentation of the male mold and the indentation of the female mold do not exceed ±1mm.

The indentation on the surface of the box should be flattened and bent, and it should be substantially vertical unless the inner side paper allows some cracking.

<Adjustment of layout pressure>

The proper pressure makes the cut edge of the finished product clean and free of hair, easy to remove the waste edge, and the die cutter is not easy to wear. First, roughly adjust the pressure of the machine. Insert paper under the steel plate. After the pressure test, observe whether the waste edge at the edge is easy to separate. Place paper partially in the place where the separation is not, so that the pressure of each die cutter on the layout is uniform and the balance is gradually improved. Increase the pressure on the machine. The pressure of the indentation line depends on factors such as the thickness and height of the indentation line, and the ideal pressure needs to be pressed out of the proof for inspection.

<Advantages of positive die cutting>

Front die cutting is more conducive to solving the bursting problem than back die cutting. Since corrugated cardboard is subjected to high temperature drying during creasing, the faced paper of corrugated cardboard is usually relatively simple. If there are more recycled components in this layer of paper, In the printing of large areas, it is easier to cause die-cutting. Therefore, many cardboard manufacturers have to use more expensive raw paper to process pasta, but this raises production costs.

In the case of die-cutting, most carton manufacturers are accustomed to back-die cutting. However, in this case, the use of positive die-cutting can greatly reduce the occurrence of popping, especially when it is necessary to do 180 degrees. If the folded indentation is back die-cut, popping will definitely occur.

This is because when die-cutting, the layers of the cardboard are not aggregated after being pressed, but dispersed; and the more dispersed the layers in the cardboard, the smaller the tension in the cardboard is, and the more beneficial is the crease. If a backside die cutting method is used, when the indentation is folded over 90', the layers of the pressed cardboard are re-pressed together and bursting occurs. Conversely, if the front die cutting is used, the cardboard can be kept in a dispersed state, which can effectively solve the bursting problem when the folding exceeds g0*. Therefore, in the face of die-cutting and bursting problems, in addition to improving the quality of cardboard, the use of positive die-cutting is also an effective method to solve die-cutting and bursting. In addition, the use of positive die cutting can improve the alignment during die cutting, which can effectively improve die cutting accuracy.

(to be continued)