What are Packing Cases?

The packing box is mainly for the convenience of transportation, loading and unloading, and storage. Generally, wooden boxes and corrugated solid wood pallets are used, and tin or white iron drums are also used. The adopted standard is the GB / T 7284-1998 frame wooden box national standard drafting unit. According to the characteristics of the items being transported or loaded, national standards are adopted for protection. It is now obsolete on May 15, 2016 and replaced by GB / T 7284-2016.

1. Packing box: suitable for domestic or export packaging of various goods and products, economical and affordable.

2.

In many

Box type and size design of packing box

Abstract: People have higher and higher requirements for the function of packaging boxes. For a packaging box that integrates multiple functions, a reasonable box type and size design are very important. Therefore, how to design a reasonable box type and size according to relevant standards is also a question worth exploring.

Keywords: packing box type; size design

Various industries have increased the use of packaging boxes, and users have put forward higher requirements for their functions. In terms of the structural design of the carton, especially in container packing and transportation, shelf storage, reasonable size, shape and materials can not only save costs, provide the optimal packaging solution, but also ensure that the product is in the long-term freight transportation Get the most effective protection. Under such circumstances, the structure and size design of the packaging box also become increasingly important.

First, the box type standard

The size design of the carton starts with determining the nature of the product and the box type. First determine the box type to design and calculate the size of each part.

(I) International Carton Box Standard

There are two types of box standards for international packaging boxes. One is an international carton box type standard approved by the International Packaging Board Association and jointly developed by the European Packaging Board Manufacturing Industry Federation (FEFCO) and the Swiss Cardboard Association (ASSCO). One is the national standards of Japan and the United States. In the international carton box type standard, the text name of the box type is represented by a simple 4-digit to 8-digit code. Various box types can be found in the standard with a legend.

The unified serial number indicates different box structures in the same box type. The modification is a modification of the standard box type by each manufacturer. The box types represented by different manufacturers' modified suffix codes are different, but the same manufacturer should be the only one dedicated. The suffix code is convenient for building CAD / CAM library or special box library.

Such as the commonly used 02-type carton, also known as slotted carton, using a sheet of cardboard molding, the connected upper and lower flaps can close the carton. Generally, in carton factories, the joints are joined by nailing, adhesive or tape paper bonding. The length of the joining side depends on the thickness of the packaging board used, and is generally between 25 mm and 45 mm. The 02 type also has a bottom insertion structure, which is characterized by preventing the contents from leaking out from the bottom. The 02-type packing box is flat in shape during transportation, and the contents are sealed with a flap when in use, which is the most widely used.

China's packaging box code is defined by the type of packaging plate, divided into 3 categories, and each category is divided into 5 types, corresponding to the type of packaging plate. The codes, specifications and use occasions of various types of packaging boxes can be found in the national standard. Class 1 cartons are mainly used for export and transportation of valuables without B or BB corrugation; Class 2 cartons are mainly used for transportation packaging of domestic products; Class 3 is mainly used for short-distance, low-value goods packaging.

When designing or selecting packaging boxes, consideration should also be given to the selection of suitable packaging boards, including corrugated types, cardboard layers, base paper specifications, etc. This is clearly specified in relevant standards and information.

Second, the size design of the packaging box

Before determining the structural dimensions of the packaging box, we must first consider the maximum outer diameter of the interior product, the nature and the tolerance coefficient of the product itself shrinkage, and whether the interior product is a whole or a combined set. At the same time, it is necessary to consider various attachments and other accessories to protect the interior goods. This requires the design arrangement and structural layout to consider the impact of multiple factors on the structural dimensions of the packaging box.

(A) size requirements

The specifications of the carton are generally expressed by the inner diameter dimensions of the carton, such as length, width, and height, and the dimensions are given in the following order and code, in mm.

a. Length (L): the size of the long side of the bottom area of the box;

b. width (B): the size of the short side of the bottom area of the box;

c. Height (H): the size of the top surface and bottom surface of the box.

The dimensional design content of the packaging box includes the design of the inner diameter size, manufacturing size and outer diameter size. The inner diameter size is the size of the inner space after the box is completed. The outer diameter size is the outer contour size of the box after it is completed. The size can be the inner diameter plus the thickness of the packaging board used as the manufacturing size.

3.Design of joint size

The packaging box is formed by gluing and nailing the joints. The size of the joint ruler is generally determined by the number of corrugated layers and the process level of the factory. In order to keep the printing surface of the main box surface (LH surface) from being damaged, the joint should generally be connected to the LH surface. The size of single corrugated joints is generally 35 mm to 40 mm, double corrugated 45 mm to 50 mm, and three corrugated 50 mm.

Third, the size of the problem

Generally, the packaging board needs to be bent by a molding process. Molding damages the structure of the packaging board, which will cause the inner paper to shrink and the face paper to extend. This bending change makes the extension of the packaging board the basic size of the packaging box design. Therefore, the inner diameter of the packing box is slightly shorter than the distance between the line and the pressing line when the packing box is unfolded. In this way, the reduced size must be added. The added size is closely related to the thickness of the packaging board used. In the actual production of the packaging box, an appropriate correction factor and additional dimensions should be selected according to the specific equipment used. The table of correction coefficient values can be obtained.

Packaging boxes are usually designed according to the inner diameter. Because the inner diameter size is relatively easy to determine, it is realized and determined by physical measurement or by the outer diameter size of a combined set and a reasonable arrangement. However, in actual operation, whether it is the calculation of the freight rate or the volume in the box mark, the outer diameter dimension shall prevail. Therefore, in the design of the packaging box, not only the manufacturing size should be determined according to the inner diameter size, but also the outer diameter size should be calculated based on 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 transportation means to realize mechanized transportation and improve transportation efficiency. Due to the different stacking methods of the packing boxes, the vertical projection area of the stacked objects should be suitable for the size of the pallet. If the size of the box calculated from the inside to the outside of the carton can be basically matched with the size of the box calculated from the outside to the inside, the optimal packing box size can be obtained. Of course, the best design solution should be carried out step by step from outside to inside.

In actual production, customers often only provide us with the size or style of the built-in product, which requires us to calculate the outer diameter and manufacturing dimensions of the carton. Especially for products transported in containers, the calculation of the outer diameter of the carton is particularly important. When measuring the packaging box, although the specific dimensions can be directly measured with a tool, during the measurement process, due to the influence of the indentation line, the measurement results will not be accurate enough. In particular, the measurement of the size of used cardboard boxes should be strictly calculated to ensure the accuracy of dimensional design, ensure the smooth progress of pallet or container loading in the later stage, and protect the goods well. A good carton design can save a lot of cost in transportation.

Methodologies in design

The packaging structure design is based on the actual conditions of packaging and production, and the design of the packaging's external structure and internal accessories based on scientific principles. The design must ensure that the structure has sufficient strength, stiffness, and resistance to other environments. From the purpose of packaging, the following two aspects must be considered, one is to protect the primary function of the product, and the other is to meet the important characteristics of modern packaging, such as transportation and processing characteristics.

Qualified carton products start with the correct structural design. Designers must not only truly understand the customer's intentions, but also be familiar with the post-processing process. Only in this way can the customer's intention be transformed into a qualified product, and the subsequent processing can be guaranteed to proceed smoothly. The designer should understand the nature, shape, size, weight of the contents, the arrangement of the contents, the transportation method, the stacking method, the storage environment, the transportation route and time of the contents, and the carton box and production materials information.

There are some technical and guiding ideological problems in domestic carton design, and a lack of systematic analysis makes the designed packaging unable to meet the requirements of ergonomics and technical and economic rationality. This is reflected very clearly in the carton size design.

China only makes clear regulations on the carton box type, but there is no specific requirement on the size of the carton, which is mainly determined by the designer. The designer mainly considers two factors when determining the size of the carton: one is to be able to contain the contents; the other is to have sufficient strength. In fact, in addition to the contents of the package, there are many other factors that restrict the size and shape of the carton, such as ergonomics, the size of the pallet, the size of the truck compartment, the size of the container space, and the Size and so on. These factors are both independent of each other and restrict each other; both the packaging function and convenience must be considered. Therefore, only by systematically and comprehensively grasping all the constraints during design, can the size of the carton be truly and reasonably determined.

In summary, the size design of the carton is a very important work in the structural design of the packaging box. A qualified carton product must be protective and well-shaped. Especially for the carton that combines the functions of sales packaging and transportation packaging, reasonable size will be the key to carton design. Because the size change will directly affect the various performance changes of the carton. In short, in the structural design of the packaging box, it should be determined according to the manufacturing equipment used, different production processes, packaging made of different corrugated shapes, and the type and nature of the goods inside. Only after grasping the structure and size of the design packaging box can we manufacture the packaging box that protects and beautifies the product. ^[1]