With the improvement of the social development and people's living standard, consumers in the purchase of goods, in addition to the requirements of the intrinsic quality of the goods, but the packaging of goods also put forward higher requirements. Which includes both goods packaging design requirements, including quality requirements for packaging finishing. The local printed material is compacted, producing traces in space so that there is a certain concavity called indentation.
Indentation processing technology, originally only for paper packaging box shape, then gradually applied to the surface processing all types of printed matter, especially finishing process cartons, cardboard boxes, trademarks, artwork and other relatively high-grade surface. Now, the indentation technique is one of the important means to achieve packaging design, not only for the quality and effectiveness of the final packaging plays an important role, but also greatly improve the artistic effect prints, prints given new functions, has become an important means of print and promotional value. Therefore, more and more indentation industry's attention, range more widely used. However, in the process cutting indentation, there are often a number of issues affecting the smooth production of this paper to a horizontal platen die-cutting machine cutting indentation in the production of the common issue as an example for analysis I hope to be helpful to the actual production.
A common problem indentation
Automatic horizontal platen die-cutting machine, the feeding and the collection of paper and offset a similar principle, which is the fault not in this analysis, the following is just to die some common problems were analyzed.
Uneven pressure
We know that the indentation is a fold, pinch or crease line marks caused. Indentation of the whole process: design - Proofing - Composition - Edition - pad version - Power - finishing - finished. In the folding carton manufacturing process, the line mark is a controlled deformation of the cardboard. Indentation principle is cardboard in the middle of two fixed surface (die and punch) plate, destruction of fibers within the paper structure, causing part of the layered paper, concave and convex external form line marks. When the board is connected to ninety degrees or indentation hundred and eighty degree fold, then fibers within the paper bonding (cohesion) would be completely separated.
Uneven pressure indentation process, there are two cases: one is slightly uneven. If the pressure is slightly uneven, probably due to cutting knife, wire (steel, steel wire) are unevenly distributed, causing the moving platform at the die skew caused by force, this should be installed on the die balance knife line, make the platform even by force. There also may be affected by paper fibers to the paper vertical and lateral knife line, creasing effect is more ideal. Another serious unevenness. If the front and rear corners of the platform to appear more severe stress uneven, are mainly moving platform supporting four rod pendulum height due to the inconsistent, you should open the hood die base to check whether the pendulum wear, such as the need to replace the badly worn, otherwise need to adjust the four pressure adjustment wedges, until the pressure is consistent so far.
Blast lines (color burst)
When indentation mold (punch) steel wire pressed into the groove, paperboard by three forces: pressure, tension and surface tension. In addition to these three forces make permanent deformation of the outer cardboard cardboard layers also enables the cohesion between the fibers decreases. Folding the paper is subjected to tension while the inner surface is subjected to pressure, if the pressure exceeds the cohesion between the fibers of the paper, make cardboard fiber breakage inside the paper becomes soft and pliable in the fold. But not too much pressure, when more than cardboard outer strange tension will break (when cigarette packaging burst). With cardboard surface tension it will put pressure on the indentation on the number of board increases in die-cutting process. Explosion line refers to products in the die or finished folding, creasing of the paper cracking. This is a recurrent problem in the indentation, especially in dry weather conditions, a frequent occurrence.
