In general, many factories can print directly on the ri […]
In general, many factories can print directly on the ribbon without direct trimming. However, this Unilever's carton box is full of prints directly slotted out of the finished product, without the need for die-cutting, and at the same time the edge of the product does not appear to print white, then how does this do it?
When full-printing, most companies need die-cutting production. In order to ensure print quality, it is also necessary to add a certain area (such as an increase of 20mm) around the circumference of the original carton to ensure that the rolled carton does not leak out. , where the increased 20mm part is the full version trimming loss, so that the use of cardboard will increase the area, such as doing 100,000 cartons, carton length 100000 * 0.002 meters = 20 meters, then the width is 20 meters, then do 100,000 cartons will require more than 20 meters * 20 meters = 4000 square meters, according to 3 yuan per square meter, carton production line so that it will waste 12,000 yuan each time. More than worth it!
Of course, the reason for using die-cutting to produce is mainly because there is no way to guarantee that the edges of the cardboard are not whitened. In terms of production, the number of processes increases, the number of personnel is increased, and the efficiency is reduced. The cost is related to the production of die-cutting boards and the trimming of die-cutting. The entire cost is 5% higher, which is really not worth it! But in fact, we change the way to increase the amount of ink, you can not die-cutting production, do more with less!
How exactly did such a product come from? How is it guaranteed that the printing is not revealed? The following simple analysis:
1. Paperboard: Corrugated paperboard should ensure that the edge of the paperboard is smooth and the edge is not allowed to warp. If it is necessary to consider the paper feed direction, it can not be retrogradely printed, so that the paperboard edge will appear printing white phenomenon.
2. Ink: The color concentration of red ink must be high, which is often referred to as high concentration and low viscosity. If the concentration is not high, then the chance of printing whitening will be large, and it will be necessary to increase the printing pressure, and increasing the printing pressure will cause the cardboard to be crushed. Therefore, the quality of the ink must be ensured, which is also a key point.
3, printing plate: printing plate needs to be improved, the first printing plate hardness to be controlled at 34 degrees, if the printing plate hardness is too high, then the ability of the printing plate transfer ink is weakened, is bound to cause printing dew. Secondly, stick tape on the edge of the upper and lower flaps of the back side of the printing plate to increase the printing pressure on the edges of the cardboard.
4. Pressure: Measure the thickness of the board before production, adjust the thickness of the board, the gap between the feed wheel and the gap in the front baffle, and then do not print on the board to determine if the thickness of the board has been crushed.carton gluing machine The gap between the feed rollers is critical and must not be too heavy. For example, if the pressure is too high, the paperboard is crushed, any subsequent pressure needs to be increased, and the edge of the paperboard is also easy to turn over, resulting in printing whiteness. Therefore, the paper feed section adjustment is also very important. of.
Although not all full-printing can be done without trimming or die-cutting, some of the products can still be produced through production process improvements that do not require trimming, which reduces production losses and increases production capacity.