The commonly carton box creasing issues

1. Uneven pressure issue

We know that the carton box creasing line caused by folding, extrusion or wrinkle. The entire creasing process includes: carton box structure design - Proofing - step and repeat- load plate- mat plate - Boot - finishing process. During the folding carton manufacturing process, the creasing line marks on the cardboard have controllable deformation. The creasing principle is put the cardboard in two fixed surface (male and female) for platen, the paper internal fiber structure destructed, resulting in the paper part of the hierarchical, external formation of concave and convex lines marks. When the cardboard connected to the creasing line with ninety or one hundred and eighty degrees fold, the the paper internal fiber bonding (cohesion) completely separated.

There are two cases caused the uneven pressure in the carton box creasing process: one is slightly uneven.If the pressure has a slightly uneven, it may be due to the cutting knife, the line is unevenly distributed, this time should install the balanced die line, so that platform force uniform.It also may be subject to the strike of the paper fibers, paper horizontal vertical with the die line the creasing effect better. Another is serious unevenness.If the platform back and forth into the four corners of the serious phenomenon of uneven pressure, it should to check whether the pendulum wear and tear, such as the need to replace the badly worn, otherwise need to adjust the four pressure adjustment wedges until the pressure is consistent.

2. Burst line issue

Burst line refers to carton box during die cutting or folding, the paper cracking around the creasing line, it often happens especially in the case of dry weather. when the the creasing mold (punch) pressed into the groove, there are three forces work on the cardboard: pressure, tension, and surface tension. These three forces in addition to permanent deformation of the board also reduce the cohesion between the cardboard layers of fiber. During folding the paper surface was subjected to the tension of the inner layer is subjected to the pressure, if the pressure exceeds the cohesive force between the paper fibers, will make cardboard internal fiber breakage, the paper becomes soft and easy to bend.The pressure can not be too much, when it is more than cardboard tension the carton box will have burst line. It happens under many situations such as the paper crispy, the cardboard caliper, excessive pressure of the die cutting machine etc.

3. Irregular creasing line issue

The creasing line with the process by the steel line through the imprint traces substrates pressure groove marks left conducive to bend. The main reason causes the irregular creasing line of the carton box are too wide creasing groove, less thickness of steel wire pad paper, and non-standard slotted angle, excess rounded ; row knife, solid knife tightness inappropriate, steel line is too tight etc.. The carton box irregular creasing line exclusion approach is to replace the steel wire pad of paper, the indentation groove width is appropriate; increase steel wire pad of paper thickness, trimming groove angle; adjust the template position; row knife solid knife hand many times feeling the tightness suitable prevail.

In short, the improvement of the living standards of quality requires the carton packaging is not only qualified on technical aspects such as hardness, compression, and aesthetically beautiful viewing level to continuously exceed, also requires the creasing process technique to provide more and better products.