Corrugated cardboard boxes and accessories of the shape, structure and design

October 13, 2022

1, the shape of corrugated boxes and accessories

Corrugated cartons are classified differently according to different countries in the world. The internationally accepted method is the classification of corrugated cartons and corrugated cartons proposed by the European Association of Cardboard Manufacturing Industries (FEFCO) and the European Association of Cardboard Boxes (ASSCO). International Carton Box Type Standard. The standard numbered all types of corrugated boxes, corrugated boxes, and accessories by four-digit numbers. If we usually call it a corrugated carton, the international carton box standard calls it a type 0201. This classification method has now been accepted by all countries in the world. This standard method has been adopted for the standard classification of tile cartons, corrugated boxes and accessories in China.

2, manufacturing size

The inner diameter size plus the thickness of the corrugated board used is the manufacturing size.

3, outside diameter size

The actual manufactured size is the thickness of the corrugated board used is the outer diameter size.

Corrugated paperboard is used to make corrugated boxes. In order to make corrugated paperboards well bent, we must adopt the method of pressing the wire. The structure of the corrugated paperboard will be shrunk by the pressure lines, shrinking the inner paper and extending the paper. This reflects the corrugated paperboard. The relationship between the pressure line and the size of the corrugated box.

Regardless of whether the corrugated carton is formed by a three-point or five-point press line method, the protruding portion of the bottom line of the press roller squeezes the pressed portion of the corrugated cardboard into the center of the corrugated cardboard. 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. This will add the size of the part of the Qiao Shi, which is closely related to the thickness of the corrugated board used.

When making a corrugated box, the following relationship must be satisfied between the outer diameter of the product and the inner diameter of the corrugated box:

Inner diameter of corrugated box> External diameter of inner product

The relationship between the inner diameter size and the outer diameter size of the corrugated box must meet the following relationship:

Corrugated box outer diameter size = corrugated box inner diameter size + thickness of two corrugated cardboard

Corrugated cardboard boxes in the design of the corrugated board is mostly bent into a U-shaped or L-shaped by the pressure line, and sometimes by die-cutting or flat-press processing into two high and low pressure lines, this bending change makes the corrugated board to extend the size into The basic dimensions of the corrugated box design. The basic concept of its design and basic additional dimensions. In the actual production of corrugated cartons, appropriate correction factors and additional dimensions are selected according to the specific equipment used. At present, China's use of the type of corrugated cardboard box size and Japan's use of A-type corrugated box manufacturing size correction factor.

In addition, the manufacturing size of the flaps outside the corrugated box is also a key part to pay attention to. In the box type with the butt-sealed cover of the corrugated cardboard box outside, such as 0201, 0204, 0207, etc., the theoretical value of the manufacturing width of the swing cover width should be half of the manufacturing width of the box width. However, due to the rebound effect of the inner flap, the outer flap must produce a certain gap at the butt joint. Therefore, a correction value should be added to the dimension of the outer flap width of the butt joint. This correction value is called the flap extension factor.

We made corrugated boxes based on the inner diameter dimensions. Because the inner diameter size is relatively easy to determine, it is measured and determined in physical measurements or in outer diameters in a combination of packages and a reasonable arrangement. But in actual operation, the argument is the calculation of the freight, or the volume in the face of the sign, should be based on the size of the outer diameter. Therefore, in the corrugated box design, not only the manufacturing size is determined according to the inner diameter size, but also the outer diameter size is calculated based on the manufactured size.

In short, in the structural design of corrugated boxes, it is necessary to determine the type and nature of the corrugated papers and interior products that are used according to the manufacturing equipment used and the different production processes and the different types of crucibles used. Only the design of all corrugated boxes is mastered. Only after the structure and size-related contents can the corrugated boxes protect the goods and beautify the products.