Corrugated board pressure line to solve the problem - the exact size (in)

Impacts and Corrections of Factors such as Indentation Bending in Manufacturing

â—† The effect of corrugated board indentation. In order to make the corrugated board easy to be folded into boxes after being unloaded, it is necessary to carry out indentation (also known as pressing or thread striking) according to the exact dimensions, which is to be bent in the production of the carton through the indentation (pressing line) machine. First press out a mark with a width of about 7mm. as shown in picture 2. Because the interior of the corrugated cardboard is hollow, the indentation will cause shrinkage, leading to a reduction in the length of the board. According to the relevant data and practice, it is shown that after pressing 10 indentations in parallel at a certain distance on a five-layer corrugated board, the length of the board will be shortened by 8mm. When the corrugated board is thin and the number of indentation tracks is small, the amount of shrinkage is also very small (sometimes it may not be counted). In general, the thicker the corrugated board and the greater the number of indentations, the greater the shrinkage.

◆ The effect of the thickness of corrugated board can be seen from Fig. 2. If the internal diameter is scribed with an indentation, the actual internal dimensions of the carton obtained after the corrugated board is bent at 90° are smaller than the required internal diameter by a plate thickness. (One side of the figure is half the board thickness). The thicker the corrugated board, the greater the difference between the manufactured size and the inner diameter size;

◆ Dimensional manufacturing dimensions that meet the inner diameter size requirements. The size of the carton is generally determined based on the size of the inner diameter. As described above, the length of the cardboard in the bending and indentation will be shortened. Therefore, the size of the carton needs to be increased on the basis of the inner diameter size, which is called a stretching head or a large amount. Extend amount (value). The specific extension includes the length, width, and height in three directions. The value of the extension is related to the material of the corrugated board, the shape of the crucible, the number of layers, the indentation process, the bending process, and the box type. It is difficult to make uniform values ​​for specific values. See Table 2 and Table 3. (See Table 2, Table 3)

When measuring the size of the carton in general, according to the middle of the package, tighten and then zoom in according to the tolerance coefficient to ensure that the box is not overtightened. When the box is made, the size of the manufacturing cut is calculated according to the inner diameter specification and the added value is taken into consideration. Therefore, regardless of how the outer diameter size exceeds the manufacturing size, regardless of the size of the tank face mark, or how to calculate the freight, the outer diameter size is subject to actual measurement. Therefore, the actual outer diameter size must be printed on the surface of the corrugated box.


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