The manufacturing dimension of carton packaging is the blanking dimension during carton making, and the manufacturing dimension is based on the pressing line on the expansion box blank. The indentation roller on the slitter presses out a groove at the line pressing position. The line pressing is the middle line of the groove, and the distance between the two lines is the manufacturing size. Converting manufacturing dimensions to internal and external dimensions is a quick fix, but they also have their own measurement methods.

在制造过程中，纸箱包装可分为单拼接和双拼接：单拼接是一页成型箱，一般用于周长较小的产品；双拼接也称为两页箱。有些产品的周长太大，需要用两个盒子拼接一个。然而，有时制造商会用两片拼接一个不太大的纸箱，以利用生产过程中切割的剩余材料，有时用四片拼接。与一页箱相比，两页箱有一个接头，因此两者的面积计算有一些细微的差异。

In the manufacturing process, carton packaging can be divided into single splicing and double splicing: single splicing is a one page shaped box, which is generally used for products with small perimeter; Double splicing is also called a two page box. The perimeter of some products is too large, and two boxes need to be used to splice one. However, sometimes the manufacturer will use two pieces to splice a small carton to make use of the remaining materials cut in the production process, and sometimes use four pieces to splice. Compared with one page box, two page boxes have a joint, so there are some slight differences in the area calculation between the two.

根据瓦楞层数和生产工艺水平确定产品接头的制造尺寸，单瓦楞纸板35-40mm，双瓦楞纸板45-50mm，三瓦楞纸板50mm。

The manufacturing size of the product joint is determined according to the number of corrugated layers and the production process level. The single corrugated board is 35-40mm, the double corrugated board is 45-50mm, and the three corrugated board is 50mm.

在计算纸箱包装的展开面积时，需要考虑制造过程中回丝的损耗，回丝的尺寸需要根据纸板的层数来确定。一般来说是20-40毫米。在实际工作中，为了便于计算，我们采用了8加4的统一规则，即水平接头和回丝的总和定为8厘米，纵向回丝的总和定为4厘米，即需要计算的总尺寸。

When calculating the unfolding area of carton packaging, the loss of return wire in the manufacturing process should be considered, and the size of return wire should be determined according to the number of layers of cardboard. Generally speaking, it is 20-40 mm. In practice, in order to facilitate the calculation, we adopted the unified rule of 8 plus 4, that is, the sum of the horizontal joint and the return wire is determined to be 8 cm, and the sum of the longitudinal return wire is determined to be 4 cm, that is, the total size to be calculated.

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