Generally corrugated cardboard box needs to be well bent by molding process. Molding damages the structure of the corrugated cardboard, which will cause the inner paper to shrink and the surface paper to extend. This bending change makes the extension size of the corrugated cardboard the basic size of the corrugated box design. Therefore, the inner diameter of the corrugated box is slightly shorter than the distance between the line and the pressure line when the corrugated box is unfolded. In this way, the size of the reduced part should be added, and the added size is closely related to the thickness of the corrugated cardboard used. In the actual production of corrugated boxes, appropriate correction factors and additional dimensions should be selected according to the specific equipment used. The correction coefficient value can be obtained by looking up the table.
The production of corrugated cardboard boxes is generally designed according to the inner diameter size. Because the inner diameter size is relatively easy to determine, it is realized and determined by physical measurement or the outer diameter size of a combined set and a reasonable arrangement. However, in actual operation, whether it is the calculation of the freight or the volume in the box surface mark, the outer diameter shall prevail. Therefore, in the design of corrugated boxes, not only the manufacturing size should be determined according to the inner diameter size, but also the outer diameter size should be calculated according to the manufacturing size.
Of course, the outer diameter of the carton can also be determined according to the inner diameter of the pallet or container, so that the length, width and height of the carton can be adapted to the means of transportation, so as to realize mechanized transportation and improve transportation efficiency. Due to the different stacking methods of corrugated boxes, the vertical projected area of the stacked objects should be adapted to the size of the pallet. If the box size calculated from the inside to the outside is basically consistent with the box size calculated from the outside to the inside, the optimal corrugated box size can be obtained. Of course, the best design solution should be carried out step by step from the outside to the inside.