Packaging of indoor unit of the most popular split

The main function of air conditioning packaging is to protect products, facilitate storage and transportation, and promote sales. Because what consumers pay attention to is that the appearance of the air conditioner is intact and can operate normally after installation and commissioning. As for whether the printed pattern of the outer package of the air conditioner is exquisite and gorgeous, it has little practical significance for consumers. Therefore, the printing pattern of air-conditioning outer packaging should strive to be simple and clear, and the packaging should have a certain protection function in the development of the industry

air conditioning packaging design

1. Pre design of air conditioning packaging size

for household appliance enterprises, transportation costs are a lot of costs, especially with the continuous rise of oil prices, transportation costs are even higher. Therefore, in the research and development of air conditioners, reasonable structural size suggestions should be given to the structural design department. If the overall size of air conditioners is designed reasonably, the space utilization of containers can be improved after packaging, so as to save transportation costs

2. Selection of cushioning materials

with the enhancement of people's awareness of environmental protection and the legislation of European countries on the requirements of packaging environmental friendly materials, the selection of environmental friendly cushioning materials for air conditioning packaging is imperative. In the air conditioning industry, common cushioning materials are: pearl cotton (EPE), expanded polystyrene (EPS), honeycomb paperboard. As the packaging of air-conditioning indoor hook up, pearl cotton is preferred because of its good cushioning performance and environmental protection, which can play a very good protective role in the painting of air-conditioning hook up panel. Of course, the defect of pearl cotton is that the material is soft, the deformation is large, and the supporting force is not enough. When stacking, the cartons are easy to deform. However, if the corrugated box can be reasonably designed and the appropriate paper corner protector can be added as the lining when necessary, it can effectively make up for the weak compressive performance of pearl cotton

3、 Corrugated box design

1) calculation of corrugated box compressive strength

the formula of corrugated box compressive strength is as follows:

f = k x (n - 1) x w

where: F - Corrugated Box compressive strength

k - plastic material with lower dielectric consumption (it is necessary to ensure that the physical properties often used are not lower than the current materials) coefficient (generally 4.5)

n - number of stacking layers

w - weight of a single package

2) factors affecting the compressive strength of corrugated boxes

factors affecting the strength of corrugated boxes can be divided into two categories. One is an inevitable basic factor, which is also the main factor determining the strength of corrugated boxes, including: base paper strength - ring compression strength of inner paper, outer paper, corrugated core paper or flat compression strength of corrugated core; Corrugated type - A, B, C, e, etc; Types of corrugated board - double sided, double core double sided, three core double sided, etc; The influence of external environment in the field of corrugated board moisture distribution

the other is the variable factors that can be avoided in the process of designing and manufacturing corrugated boxes, including: box type and box shape (size ratio); Printing area and opening position; Corrugated box manufacturing technology; Box making equipment defects; Quality management

3) choose the box type and corrugated type of corrugated box

the indoor hanging packaging of air conditioner adopts 0201 corrugated box, which is easy to produce and package in the production process. In order to select the appropriate corrugated type of corrugated box and obtain higher compressive strength of corrugated box, we have done a lot of experiments. In terms of material selection, we selected two representative corrugated boards, namely, BC corrugated board with a thickness of 7mm and ab corrugated board with a thickness of 7.5mm. The sandwich paper of the former is made of ordinary face paper, and the sandwich paper of the latter is made of pure cow card. The edge compression strength and bursting resistance of the two kinds of corrugated cardboard were tested. The experimental data are shown in Table 1 and table 2

Table 1 edge compression strength

the following conclusions can be drawn:

① under the same gram weight, the edge compression strength of BC corrugated board and ordinary vermicelli corrugated board is 3250n lower than that of AB corrugated board and pure Kraft card corrugated board

② under the same gram weight, the bursting strength of BC corrugated board and ordinary vermicelli corrugated board is 214kpa lower than that of AB corrugated board and pure Kraft card corrugated board

in order to optimize the design of cartons, China's aluminum alloy cable industry has made eye-catching progress and improve the strength of corrugated paper. AB corrugated paper and pure Kraft sandwich paper corrugated board should be used for corrugated board. By increasing a small amount of cost, higher edge compression strength and burst resistance can be obtained, which is more important and cost-effective than pure paper. Therefore, AB corrugated board and pure Kraft card sandwich paper corrugated board should be used for indoor hanging packaging of air conditioners

4) structural design of corrugated boxes

in production practice, we found that the height width ratio RH of corrugated boxes has an impact on the compressive strength of empty corrugated boxes and the amount of paperboard. The cartons are made of corrugated board with thickness of 7mm in 200/175//2bc and corrugated board with thickness of 7.5mm in 200/175//2ab respectively in 3), corrugated box of class I RH 1, l1xb1xh1 is 885x270370, corrugated box of class I RH 1, l2xb2xh2 is 885x370270. The measured data are shown in Table 3

from this, we can draw the following conclusions:

① corrugated boxes of RH 1 save materials, and the comparison is as follows:

S1 = (L1 + B1) x (H1 + B1) x 2

= (885 + 270) x (370 + 270) x 2

= 1.48nm2

S2 = (L2 + B2) x (H2 + B2) x 2

= (885 + 370) x (270 + 370) x 2

= 1.61m2

② the compression resistance of RH 1 corrugated box is lower than that of RH 1 corrugated box. In Table 3, The empty box compression capacity of AB corrugated box and pure Kraft linerboard corrugated box decreased by 3194n, while the empty box compression capacity of BC corrugated box and ordinary vermicelli corrugated box decreased by 1826n

③ on the premise that there are no restrictions on the placement of products on the opposite side, lying down and so on, you can make the following choices: for those packages that are supported by products or have high-strength inner packaging, for example, if expanded polystyrene (EPS) is selected as the cushioning material, Rh 1 corrugated box should be used, which can save a lot of paperboard, thus reducing the packaging cost. Of course, for packaging that completely depends on corrugated boxes, for example, if pearl cotton (EPE) is selected as cushioning material, it is best to use corrugated boxes of RH 1, so as to obtain higher compressive strength of cartons

author/(Yuan Wei, Liu Jiazhu)

source: Shanghai packaging