Causes and solutions of color box cutting and fluffing

With the advent of the 21st century, the demand for quality in industrial production has become higher and higher, and the environmental awareness of the public has been further enhanced. There are more and more color box packaging manufacturers that attach importance to the ISO international quality standard certification, and shoppers are more demanding on packaging. High, packaging box not only to bright colors, generous design, but also clear lines, smooth, not burst, no color, no lint, no paper dust.

However, many color box die-cutting manufacturers often have headaches for fluffing and dusting on the box. This paper analyzes the causes of fluffing and dusting on the edges of the paper and analyzes the causes and treatment methods for reference by peers.

Before you look at the effect of different papers on fluffing. Generally high-quality raw paper fibers are longer and generally have less fluffing and dusting than recycled paper. However, at this stage, most manufacturers need to reduce packaging costs and promote environmental awareness of recycled paper products. Therefore, more and more people like to use recycled paper. In this way, it is necessary to start from the use of high-quality die-cutting materials to solve the problems of fluffing and dusting on die-cut paper.

So how to use high-quality die-cut material? First of all, you should use high quality die cutters. There are many high-priced die cutters on the market, but not every one can solve the problem. In the blade of the general high-grade die cutter, we can observe many holes and flaws with a magnifying glass, that is, the blade is not very smooth, which is one of the reasons for the generation of paper dust. In particular, the cutting knife with ruled surface treatment is very sharp on the surface, but in fact it is particularly plentiful and has the most chance of dusting. Austria's Supreme Supreme knife is designed specifically for dusting or raising. It uses a special metallic paint, like the wall of the lottery, as the pores and rafts fill, slide, which greatly reduces the generation of paper dust, more suitable for die-cut recycled paper. The reduced friction between the knife and the paper edge also reduces the mechanical wear on the blade edge, making the die cutter more durable. This kind of knife is most suitable for die-cut boxes, cosmetics boxes, food boxes, cigarette packs and other long-length products that require no dust.

Another reason for the color-cutting of the color box is that the matching and installation of die-cutting knife and sponge strip are not standardized. Sponge must have enough hardness to compress the paper and allow the die cutter to cut the paper smoothly. Different types of paper should use sponges of different hardness, and the placement and height of placement are also very sophisticated.

The standard installation and material selection are as follows:

1. Rebound sponge hardness selection principle

The following principles should be followed when choosing rebound rubber:

1) If the distance between the die cutters is less than 8mm, the sponge with a hardness of HS600 should be selected.

2) If the distance between the die cutters is greater than 8mm, sponges with a hardness of HS250 (corrugated cardboard) or 350 (paper jam) should be selected.

3) If the distance between the die cutter and the steel wire is less than 10mm, the arched sponge with a hardness of HS700 should be used; if it is larger than 10mm, the sponge with a hardness of HS350 should be used.

4) The die-cutting knife uses an arch-type glue with a hardness of HS70 to protect the connecting points from being broken.

Commonly used sponge glue has the following kinds:

1) 350 breathable sponge rubber

Compression rate of 35%, die-cutting life of 1 million times, die-cutting speed of 9000 times / hour, suitable for cardboard die cutting.

2) 200 sealed arch sponge rubber

The compression rate is 50%, the die-cutting life is 250,000 times, and the die-cutting speed is 7500 times/hour, which is suitable for die-cutting corrugated cardboard.

3) 600 solid type rubber strip

Applicable to narrow parts, such as the distance between die cutters is less than 8mm.

4) 700 Arch Strips

It is used for the positions where the distance between the die cutting knife and the knife and the steel wire is less than 10mm.

2 rebound sponge installation method

The sponge strip should leave the distance of at least 1mm on both sides of the die-cutting blade body, and cannot be installed close to the blade body. Otherwise, the sponge strip can only inflate in the opposite direction of the blade body after being pressed, which will cause the failure to pull the paper on both sides. When the cutter is still cutting the paper in the future, the paper has been broken by the sponge glue, and fluffing and paper dust will occur. In addition, sponge rubber should be 1.2mm higher than the blade, and depending on the hardness of the appropriate adjustments. If sponge hardness is greater than HS350, sponge rubber should be less than 1.2mm above the blade edge. If sponge hardness is less than HS350, sponge rubber should be 1.2mm above the blade edge. In principle, the softer the sponge glue, the higher the height. The correct height of the sponge glue allows for faster die-cut production.

In the entire die-cut version, the amount, hardness, and height of the sponge should be distributed evenly at each position. Sponge should also be placed on both sides of the balance knife.

In short, the height and hardness of all materials on die-cuts, die-cutting knives, die-cutting steel wire and sponge rubber, should be balanced. This not only has a good die cutting effect, but also can increase the speed of automatic die cutting machine.

Of course, the fluffing and dusting of the color box die-cutting are also related to the precision of the die-cutting machine, the flatness of the bottom steel plate, and the pressure adjustment. If you increase the pressure indiscriminately, even the best knives and even the best sponge glue won't work. When the automatic die-cutting machine begins to adjust the pressure, it should first be adjusted to about 80% cut-through; according to different positions, make up with the make-up material; then lock this pressure to formally die-cut. This not only has a good die cutting effect, but also has a fast production speed.

Module materials not only pay attention to quality, but also pay attention to cooperation. The ingenious cooperation of high-quality materials will not only help you to solve the problem of fuzz and dust, but more importantly, it will increase production efficiency, enhance competitiveness, and make you invincible in the fierce market competition.