CN114313636A

CN114313636A - Packaging structure, electric appliance and design method of packaging structure

Info

Publication number: CN114313636A
Application number: CN202011066278.0A
Authority: CN
Inventors: 汪月; 吴延岐; 周宇; 雷忠琦; 唐相伟
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-12

Abstract

The application provides a packaging structure, electrical equipment and a design method of the packaging structure. The packaging structure includes: the foam plastic part comprises at least two foam plastic parts, and the density of the adjacent foam plastic parts is different, so that the foam plastic part is provided with at least two stress areas, and the adjacent stress areas are suitable for bearing different acting forces. The application provides a packaging structure has adopted the design of variable density packing, can be on original packaging structure's basis, optimizes packaging structure's density and quality, breaks through current design limit, further reduces packaging structure's overall cost to bring more economic benefits for the enterprise.

Description

Packaging structure, electric appliance and design method of packaging structure

Technical Field

The application relates to the technical field of packaging, in particular to a packaging structure, electrical equipment and a design method of the packaging structure.

Background

Foam is commonly used as a packaging material in conventional household electrical appliances. Generally, high density foams are suitable for heavier products, while low density foams are suitable for lighter products. Therefore, the existing foam plastic package reduces the cost by matching the overall density of the package, and aiming at the shape and quality of the product, the most suitable density is matched to reduce the cost. However, with further control of the packaging cost by the product end, higher packaging cost reduction requirements are addressed. However, the overall too low density may cause the strength of the packaging structure to decrease, which may affect the buffering effect, thereby causing design defects and failing to pass internal tests.

Disclosure of Invention

In order to solve at least one of the above technical problems, an object of the present application is to provide a packaging structure.

Another object of the present application is to provide an electric appliance including the above packaging structure.

It is a further object of the present application to provide a method of designing a packaging structure.

In order to achieve the above object, according to an embodiment of a first aspect of the present application, there is provided a packaging structure including: the foam plastic part comprises at least two foam plastic parts, and the density of the adjacent foam plastic parts is different, so that the foam plastic part is provided with at least two stress areas, and the adjacent stress areas are suitable for bearing different acting forces.

The embodiment of this application first aspect provides a packaging structure, has adopted the design of variable density packing, can be on original packaging structure's basis, optimizes packaging structure's density and quality, breaks through current design limit, further reduces packaging structure's overall cost to bring more economic benefits for the enterprise.

Particularly, under the working condition of falling, a region with large stress and a region with small stress always exist in the product, the region with large stress requires high foam density, sufficient strength and good buffering performance, and the region with small stress does not have the requirement. However, in the original design method, in order to ensure that the cushioning performance of the area with large stress is sufficient, the foam with the same density is designed in all the areas, so that the scheme cost is increased. The foam plastic part comprises at least two foam plastic parts, and because the densities of the adjacent foam plastic parts are different, one foam plastic part adopts a mode of combining a plurality of densities instead of the single density in the prior art, so that the foam plastic part correspondingly has a plurality of stress areas and the acting forces suitable for bearing by the adjacent stress areas are different. Therefore, the stressed area with large stress corresponds to the foam plastic part with high density, and the sufficient buffering performance of the area can be ensured so as to meet the test requirement and the use requirement; and the stress area with small stress corresponds to the foam plastic part with small density, so that the weight and the cost of the packaging structure can be reduced compared with the prior art. In other words, the variable density design mode not only ensures that the high-density stressed area has sufficient buffer performance, but also reduces the whole weight of the package, thereby reducing the whole package cost.

In addition, the packaging structure in the above technical scheme provided by the application can also have the following additional technical features:

according to an embodiment of the application, the at least two of the foam parts comprise: at least one first foam portion; at least one second foam portion, the second foam portion is connected with the first foam portion, and the density of the second foam portion is greater than that of the first foam portion.

The first foam plastic part is relatively low in density, corresponds to a stress area with low stress and is used for bearing low acting force; the second foam plastic part is relatively high in density, corresponds to a stressed area with high stress and is used for bearing high acting force. Compared with the scheme of combining three densities or even more densities, the mode of combining two densities is adopted, so that the mold is simplified, the mold cost is reduced, and the manufacturing cost of the packaging structure is further reduced.

According to an embodiment of the application, the at least two foam parts further comprise: the transition foam plastic part is positioned between the first foam plastic part and the second foam plastic part and connected with the first foam plastic part and the second foam plastic part, and the density of the transition foam plastic part is greater than that of the first foam plastic part and less than that of the second foam plastic part.

The existence of transition foam portion can play good transition effect for first foam portion and second foam portion are steady transition in structure and performance, thereby guarantee foam working of plastics overall structure's continuity, are favorable to preventing to break off between first foam portion and the second foam portion. Meanwhile, the foam plastic part can be integrally formed conveniently by molding, extruding and other modes, and the processing difficulty of the foam plastic part is reduced.

According to one embodiment of the present application, the foam element has a corner, the second foam portion forming the corner.

The overall shape of many electrical products is generally rectangular, and most of the foam pieces of the corresponding packaging structure have corners. Summarizing from the results of the product drop test, the risk of damage to the corner regions of foam parts with corners is generally high, i.e. the forces to be applied are relatively high. Therefore, establish the corner position at the foamed plastic spare with second foamed plastic portion, utilize second foamed plastic portion to construct the corner, be favorable to reducing the destruction risk of corner to be favorable to satisfying the test requirement and the packing demand of product.

According to one embodiment of the present application, the foam element has a polygonal structure, and the second foam portion forms at least a portion of the edges of the polygonal structure.

The overall shape of many electrical products is polygonal, such as rectangular. According to the summary of the results of the product drop test, the risk of damage to the edges of the foam plastic part with the polygonal structure is usually high, i.e. the applied force is relatively large. Therefore, the second foam plastic part is arranged at the edge part of the foam plastic part, and at least one part of the edge is constructed by the second foam plastic part, so that the damage risk of the edge is favorably reduced, and the test requirement and the packaging requirement of a product are favorably met.

According to one embodiment of the present application, the foam element further comprises: a hollow part, which penetrates through the foam plastic piece.

According to the results of the product drop test, the risk of damage to certain parts of the foam piece is very small, i.e. the applied force is very small. For the parts, the hollowed-out design can be carried out to form the hollowed-out part, so that the use amount of the packaging material is reduced on the basis of meeting the test requirement and the packaging requirement of the product, and the packaging cost is further reduced.

According to an embodiment of the application, the at least two plastic foam parts are located in a peripheral area of the hollowed-out part.

The plurality of foam plastic parts are positioned in the peripheral area of the hollow-out part, and the hollow-out part is positioned in the middle of the foam plastic part. According to the result summary of the product drop test, the stress of the part is usually small, the damage risk is small, and therefore the part adopts a hollow design, which is beneficial to reducing the product cost and does not influence the test requirement and the packaging requirement.

According to an embodiment of the application, this fretwork portion is enclosed to the first foamed plastic portion of this foamed plastic spare, and a plurality of second foamed plastic portions of this foamed plastic spare are arranged along the circumference of this first foamed plastic portion to link to each other with this first foamed plastic portion.

Utilize first foamed plastic portion to enclose out fretwork portion, then first foamed plastic portion is complete annular structure, and intensity and shock-absorbing capacity are all better, also are convenient for machine-shaping. And a plurality of second foamed plastic portions are arranged along the circumference of the first foamed plastic portion and connected with the first foamed plastic portion, and the density is relatively high, so that the second foamed plastic portion can play a role in reinforcement and is suitable for bearing high acting force. Meanwhile, due to the design, the second foam plastic part is positioned at the part, close to the outside, of the corner part, the edge part and the like of the foam plastic part, and the damage risk is relatively high, so that the design is reasonable.

According to one embodiment of the present application, the foam element is a polystyrene foam element.

Polystyrene foam (namely EPS) is used as a packaging material, has good buffering performance and lower production cost, is more generally applied and has a mature process. Of course, the foam member is not limited to the EPS foam member, and may be other types of foam members, such as a polyvinyl chloride foam member, a polyethylene foam member, and the like.

According to one embodiment of the present application, the foam element is a one-piece structure.

The foam plastic part is of an integrated structure, such as an integrated structure formed by molding and extrusion molding, and the continuity of the foam plastic part is favorably ensured, so that the strength and the buffering performance of the foam plastic part are improved.

According to one embodiment of the application, the number of foam elements is a plurality, which are adapted to enclose a packaging space adapted to the object to be packaged.

Utilize a plurality of foam working of plastics to enclose out the packing space, compare in the scheme of single foam working of plastics, can enough treat that the packing material provides more comprehensive protection, also be favorable to simplifying the structure of single foam working of plastics to reduce packaging structure's cost, be particularly useful for the packing material that the volume is great relatively, like electrical apparatus.

According to one embodiment of the present application, a plurality of the foam pieces are independent of each other; or at least a portion of the foam elements are interconnected.

A plurality of foam working of plastics are independent each other, can form alone respectively, are favorable to reducing the structure and the processing degree of difficulty of single foam working of plastics to packaging structure's cost.

Or at least one part of the plurality of foam plastic parts can be mutually connected, so that the strength of the packaging structure is improved, the risk of deformation of the packaging structure is reduced, and better and safer protection is provided for the object to be packaged.

According to an embodiment of the second aspect of the present application, there is provided an electric apparatus including: an electrical appliance; and a packaging structure as in any one of the embodiments of the first aspect, adapted with the appliance, for packaging the appliance.

The electric appliance provided by the embodiment of the second aspect of the present application includes the packaging structure of any one of the embodiments of the first aspect, so that the electric appliance has the beneficial effects of any one of the embodiments described above, and details are not repeated herein.

According to an embodiment of the third aspect of the present application, there is provided a method of designing a packaging structure, including: acquiring the stress distribution condition of the foam plastic part of the packaging structure in a drop test; dividing the foam plastic part into at least two stress areas according to the stress distribution condition, wherein the adjacent stress areas are different in the applied force suitable for bearing; and determining the density of the corresponding foamed plastic part according to the stress magnitude of the stress areas so that the foamed plastic part comprises at least two foamed plastic parts and the densities of the adjacent foamed plastic parts are different.

The embodiment of the third aspect of the application provides a design method of a packaging structure, has adopted the design thinking of variable density packing, optimizes packaging structure's density and quality, can break through the design limit of current single density design mode, further reduces packaging structure's overall cost to bring more economic benefits for the enterprise.

Particularly, as mentioned above, under the condition of falling, the product always has a region with large stress and a region with small stress, the region with large stress requires high foam density, sufficient strength and good cushioning performance, and the region with small stress does not have the requirement. However, in the original design method, in order to ensure that the cushioning performance of the area with large stress is sufficient, the foam with the same density is designed in all the areas, so that the scheme cost is increased. According to the design method, the foam plastic part is partitioned according to the stress condition of the foam plastic part in a drop test, and then the density of the corresponding foam plastic part is reasonably designed according to the stress of a stress area. Therefore, the stressed area with large stress corresponds to the foam plastic part with high density, and the sufficient buffering performance of the area can be ensured so as to meet the test requirement and the use requirement; and the stress area with small stress corresponds to the foam plastic part with small density, so that the weight and the cost of the packaging structure can be reduced compared with the prior art. In other words, the variable density design mode not only ensures that the high-density stressed area has sufficient buffer performance, but also reduces the whole weight of the package, thereby reducing the whole package cost.

According to an embodiment of the present application, the method of designing a packaging structure further comprises: acquiring a basic design version of the packaging structure, wherein the foam plastic part designed by the basic design version is a foam plastic part with single density; the process of determining the density of the corresponding foamed plastic part according to the stress magnitude of the stress areas so that the foamed plastic part comprises at least two foamed plastic parts and the density magnitudes of the adjacent foamed plastic parts are different comprises the following steps: the density of the stress area with relatively smaller stress in the adjacent stress area is reduced on the basis of the basic design version, so that the foam plastic part comprises at least two foam plastic parts, and the density of the adjacent foam plastic parts is different.

For existing products, which have a single density packaging structure, improvements can be made directly on the original packaging structure, namely: the density of the stressed area with small stress is reduced, while the density of the stressed area with large stress is kept unchanged, thus forming the design version with variable density. The packaging structure of the existing product can be improved by improving the basic design version, so that the design workload and the design cost of the packaging structure are reduced.

Additional aspects and advantages of the present application will be set forth in part in the description which follows, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a prior art foam plastic part mated with a package;

FIG. 2 is a perspective view of a prior art foam element;

FIG. 3 is a schematic top view of the foam element of FIG. 2;

FIG. 4 is a schematic view of the foam element of one embodiment of the present application in combination with an article to be packaged;

FIG. 5 is a schematic structural view of a foam element provided in accordance with one embodiment of the present application;

FIG. 6 is a schematic structural view of a foam element provided in accordance with one embodiment of the present application;

FIG. 7 is a perspective view of a foam element according to one embodiment of the present application;

FIG. 8 is a schematic top view of the foam element of FIG. 7;

fig. 9 is a schematic perspective view of an electrical apparatus according to an embodiment of the present application;

FIG. 10 is a schematic view of the electrical apparatus of FIG. 9 from a perspective;

FIG. 11 is a schematic view of the electrical apparatus of FIG. 9 from another perspective;

fig. 12 is a schematic flow chart of a method for designing a packaging structure according to an embodiment of the present application.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 11 is:

1 'foam plastic piece, 2' to-be-packaged material;

the correspondence between reference numerals and part names in fig. 1 to 11 is:

1 foamed plastic part, 11 foamed plastic parts, 111 first foamed plastic parts, 112 second foamed plastic parts, 113 transition foamed plastic parts, 12 corners, 13 edges, 14 hollow parts, 2 to-be-packaged objects, 3 electric appliances, 100 packaging structures and 200 electric equipment.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

The following describes a packaging structure, an electric appliance, and a design method of the packaging structure provided in some embodiments of the present application with reference to fig. 1 to 12.

An embodiment of the first aspect of the present application provides a packaging structure 100, comprising: at least one foam element 1, as shown in fig. 7. The foam element 1 comprises at least two foam parts 11, as shown in fig. 4. The density of adjacent foam sections 11 is different, as shown in figure 5, so that the foam element 1 has at least two force-bearing areas and the adjacent force-bearing areas are adapted to bear different forces.

The packaging structure 100 that the embodiment of this application first aspect provided has adopted the design of variable density packing, can be on original packaging structure 100's basis, optimizes packaging structure 100's density and quality, breaks through current design limit, further reduces packaging structure 100's overall cost to bring more economic benefits for the enterprise.

Particularly, under the working condition of falling, a region with large stress and a region with small stress always exist in the product, the region with large stress requires high foam density, sufficient strength and good buffering performance, and the region with small stress does not have the requirement. However, in the original design method, in order to ensure that the cushioning performance of the area with large stress is sufficient, the foam with the same density is designed in all the areas, as shown in fig. 1, and the cost of the scheme is increased.

The foam plastic part 1 of the scheme comprises at least two foam plastic parts 11, and because the densities of the adjacent foam plastic parts 11 are different, one foam plastic part 1 adopts a mode of combining a plurality of densities instead of the single density in the prior art, so that the foam plastic part 1 correspondingly has a plurality of stress areas, and the acting forces suitable for bearing the adjacent stress areas are different.

Therefore, the stressed area with large stress corresponds to the foam plastic part 11 with high density, and the sufficient buffering performance of the area can be ensured so as to meet the testing requirement and the using requirement. And the stressed area with small stress corresponds to the foam part 11 with small density, so that the weight and the cost of the packaging structure 100 can be reduced compared with the prior art.

In other words, the variable density design mode not only ensures that the high-density stressed area has sufficient buffer performance, but also reduces the whole weight of the package, thereby reducing the whole package cost.

The number of the foam plastic pieces 1 included in the packaging structure 100 may be one, and the number of the foam plastic pieces 1 included in the packaging structure 100 may also be multiple, specifically determined according to the packaging requirements of the matched objects to be packaged 2.

Such as: the objects to be packaged, which have relatively small volumes, such as liquid crystal displays, electronic scales, glass plates, etc., can be packaged by a single foam plastic 1.

Or, the products to be packaged, which have relatively large volumes, such as electric steamers, electric ovens, disinfection cabinets, dish-washing machines, refrigerators, air conditioners, and the like, can be packaged by adopting a plurality of foam plastic pieces 1.

In one embodiment of the present application, the at least two foam sections 11 comprise: at least one first plastic foam portion 111 and at least one second plastic foam portion 112, as shown in fig. 4 and 5.

Wherein the second plastic foam part 112 is connected to the first plastic foam part 111, and the density of the second plastic foam part 112 is greater than that of the first plastic foam part 111.

The first plastic foam part 111 has a relatively low density and is disposed corresponding to a stress area with a small stress for bearing a low acting force. The second foam portion 112 has a relatively high density and is disposed corresponding to a stressed area with a high stress for bearing a high acting force. Compared with the scheme of adopting three density combinations or even more density combinations, the scheme adopts the mode of two density combinations, which is beneficial to simplifying the production mold of the foam plastic piece, reducing the mold cost and further reducing the manufacturing cost of the packaging structure 100.

Of course, the foam member 1 may include other variable density designs having a combination of more densities, such as a third foam portion and a fourth foam portion, which have different densities than the first foam portion 111 and the second foam portion 112.

In one embodiment of the present application, the at least two foam sections 11 further comprise: a transitional foam section 113, as shown in fig. 6.

Specifically, the transitional foam portion 113 is located between the first and

second foam portions

111 and 112 and is connected to the first and

second foam portions

111 and 112. Wherein the density of the transitional foam portion 113 is greater than the density of the first foam portion 111 and less than the density of the second foam portion 112.

The existence of transition foam portion 113 can play good transition effect for first foam portion 111 and second foam portion 112 are smooth transition in structure and performance, thereby guarantee foam working 1 overall structure's continuity, are favorable to preventing to break off between first foam portion 111 and the second foam portion 112.

Meanwhile, the transition foam plastic part 113 is arranged, so that the foam plastic part 1 can be integrally formed conveniently by molding, extruding and the like, and the processing difficulty of the foam plastic part 1 is reduced.

Such as: in the manufacturing process, the first foam portion 111 is foamed based on the density thereof to form a certain shape, and then the transition foam portion 113 and the second foam portion 112 are formed by increasing the local density by means of pressing.

In one embodiment of the present application, the foam element 1 has corners 12, as shown in figure 8. The second foam portion 112 defines the corner 12.

The overall shape of many products for an electrical appliance 3 is generally rectangular, and the corresponding foam elements 1 of the packaging structure 100 mostly have corners 12. As summarized in the results of the product drop test, the risk of damage to the foam element 1 with the corners 12 is generally high, i.e. the forces to be applied are relatively high. Therefore, the second plastic foam part 112 is arranged at the corner part of the plastic foam part 1, and the corner 12 is constructed by utilizing the second plastic foam part 112, so that the damage risk of the corner 12 is favorably reduced, and the test requirement and the packaging requirement of a product are favorably met.

In one embodiment of the present application, the foam element 1 has a polygonal structure. The second foam portion 112 forms at least a portion of the edges 13 of the polygonal configuration.

The overall shape of many electrical 3 products is a polygonal structure, such as a rectangle. According to the summary of the product drop test results, the risk of damage to the edge of the foam plastic part 1 having a polygonal structure is generally high, i.e., the applied force is relatively large. Therefore, the second plastic foam part 112 is arranged at the edge part of the plastic foam part 1, and at least one part of the edge 13 is constructed by the second plastic foam part 112, so that the risk of damage of the edge is reduced, and the test requirement and the packaging requirement of the product are met.

In one embodiment of the present application, the foam element 1 further comprises: the hollowed-out portion 14 is shown in fig. 7. The cutout 14 extends through the foam element 1.

According to the results of the product drop test, the risk of damage to certain parts of the foam element 1 is minimal, i.e. the forces to be applied are minimal. For the parts, a hollow-out design can be carried out to form the hollow-out part 14, so that the use amount of the packaging material is reduced on the basis of meeting the test requirement and the packaging requirement of the product, and the packaging cost is further reduced.

In one embodiment of the present application, further, at least two foam portions 11 are located at the peripheral region of the hollowed-out portion 14, as shown in fig. 7.

The plurality of plastic foam parts 11 are located at the peripheral region of the hollow-out part 14, and the hollow-out part 14 is located at the middle part of the plastic foam part 1. According to the result summary of the product drop test, the stress of the part is usually small, the damage risk is small, and therefore the part adopts a hollow design, which is beneficial to reducing the product cost and does not influence the test requirement and the packaging requirement.

Wherein, the shape and size of the hollow-out part 14 can be reasonably designed according to the result of the drop test, such as round, square, oval and the like.

Specifically, the first foam part 111 of the foam member 1 encloses the hollow-out part 14, as shown in fig. 8. The plurality of second plastic foam parts 112 of the plastic foam part 1 are arranged along the circumferential direction of the first plastic foam part 111 and connected to the first plastic foam part 111.

Utilize first foamed plastic portion 111 to enclose out fretwork portion 14, then first foamed plastic portion 111 is complete annular structure, and intensity and shock-absorbing capacity are all better, also are convenient for machine-shaping. The plurality of second plastic foam portions 112 are arranged along the circumferential direction of the first plastic foam portion 111 and connected to the first plastic foam portion 111, and have a relatively high density, so that they can perform a reinforcing function and are suitable for receiving a high acting force. Meanwhile, due to the design, the second foam plastic part 112 is located at the positions, such as the corner position, the edge position and the like of the foam plastic part 1, which are relatively close to the outside and have relatively high damage risk, so that the design is reasonable.

In one embodiment of the present application, the foam 1 is polystyrene foam.

Polystyrene foam (namely EPS) is used as a packaging material, has good buffering performance and lower production cost, is more generally applied and has a mature process.

Of course, the foam member 1 is not limited to EPS foam members, and other types of foam members 1, such as polyvinyl chloride foam members, polyethylene foam members, and the like, may be used.

In one embodiment of the present application, the foam element 1 is a one-piece structure.

The foam plastic part 1 is of an integrated structure, such as an integrated structure formed by molding and extrusion molding, which is beneficial to ensuring the continuity of the foam plastic part 1, thereby improving the strength and the buffering performance of the foam plastic part 1.

In one embodiment of the present application, the number of the foam members 1 is plural, as shown in fig. 9. The plurality of foam elements 1 are adapted to enclose a packaging space adapted to the object 2 to be packaged.

Utilize a plurality of foam working 1 to enclose out the packing space, compare in the scheme of single foam working 1, can enough treat that packing material 2 provides more comprehensive protection, also be favorable to simplifying the structure of single foam working 1 to reduce packaging structure 100's cost, be particularly useful for the packing material that the volume is great relatively, like electrical apparatus 3.

In one embodiment of the present application, the plurality of foam elements 1 are independent of each other.

The plurality of foam plastic pieces 1 are independent of each other and can be formed separately, which is beneficial to reducing the structure and processing difficulty of a single foam plastic piece 1, thereby reducing the cost of the packaging structure 100.

Such as: the packaging structure 100 of the electric steamer comprises an upper foam plastic part 1 and a lower foam plastic part 1, as shown in fig. 9, 10 and 11, which are used for packaging, supporting and protecting the top and the bottom of the electric steamer respectively.

In another embodiment of the present application, at least some of the foam elements 1 are interconnected.

At least a part of the plurality of foam elements 1 may also be interconnected, which is advantageous for increasing the strength of the packaging structure 100 and reducing the risk of deformation of the packaging structure 100, thereby providing better and safer protection for the object 2 to be packaged.

Such as: the packing structure 100 of the washing machine includes a plurality of foam members 1 having side edges 13 in addition to the foam members 1 at the top and bottom, and is connected to the foam members 1 at the top and bottom to form a frame structure.

An embodiment of the second aspect of the present application provides an electrical device 200, as shown in fig. 9, 10 and 11, including: an appliance 3 and a packaging structure 100 as in any of the embodiments of the first aspect. Wherein the packaging structure 100 is adapted to the electrical appliance 3 for packaging the electrical appliance 3.

The electrical apparatus 200 provided in the embodiment of the second aspect of the present application includes the packaging structure 100 of any one of the embodiments of the first aspect, so that the beneficial effects of any one of the embodiments described above are achieved, and details are not repeated herein.

In particular, the types of appliances 3 include, but are not limited to: electric steam box, electric oven, microwave oven, disinfection cabinet, dish washer, water heater, electric rice cooker, electric pressure cooker, washing machine, refrigerator, air conditioner, etc.

As shown in fig. 12, an embodiment of the third aspect of the present application provides a method for designing a packaging structure 100, including:

step S302: acquiring the stress distribution condition of the foam plastic part of the packaging structure 100 in a drop test;

step S304: dividing the foam plastic part into at least two stress areas according to stress distribution conditions, wherein the adjacent stress areas are suitable for bearing different acting forces;

step S306: and determining the density of the corresponding foamed plastic parts according to the stress sizes of the stress areas, so that the foamed plastic part comprises at least two foamed plastic parts, and the densities of the adjacent foamed plastic parts are different.

The design method of the packaging structure 100 provided by the embodiment of the third aspect of the present application adopts the design idea of variable density packaging to optimize the density and quality of the packaging structure 100, and can break through the design limit of the existing single density design mode, further reduce the overall cost of the packaging structure 100, thereby bringing more economic benefits for enterprises.

Particularly, as mentioned above, under the condition of falling, the product always has a region with large stress and a region with small stress, the region with large stress requires high foam density, sufficient strength and good cushioning performance, and the region with small stress does not have the requirement. However, in the original design method, in order to ensure that the cushioning performance of the area with large stress is sufficient, the foam with the same density is designed in all the areas, so that the scheme cost is increased.

According to the design method, the foam plastic part 1 is divided according to the stress condition of the foam plastic part 1 in a drop test, and then the density of the corresponding foam plastic part 11 is reasonably designed according to the stress of a stress area.

Therefore, the stressed area with large stress corresponds to the foam plastic part 11 with high density, and the sufficient buffer performance of the area can be ensured so as to meet the test requirement and the use requirement; and the stressed area with small stress corresponds to the foam part 11 with small density, so that the weight and the cost of the packaging structure 100 can be reduced compared with the prior art.

In one embodiment of the present application, the method of designing the packaging structure 100 further comprises:

a base design version of the packaging structure 100 is obtained, the foam elements 1 of the base design version being a single density foam element 1.

Wherein, step S306 includes: the improvement is made on the basis of the basic design version, and the density of the stress area with relatively small stress in the adjacent stress area is reduced, so that the foam plastic part 1 comprises at least two foam plastic parts 11, and the density of the adjacent foam plastic parts 11 is different.

For existing products having a single density packaging structure 100, the improvement can be made directly on the original packaging structure 100, namely: the density of the stressed area with small stress is reduced, while the density of the stressed area with large stress is kept unchanged, thus forming the design version with variable density. The improvement on the basic design version can improve the packaging structure 100 of the existing product, thereby reducing the design workload and the design cost of the packaging structure 100.

Of course, for a new product without a basic design version, when designing the packaging structure 100, the foam plastic part 1 is directly partitioned according to a drop test result, and then each region is matched with a proper density.

Further, the design method further comprises: according to the drop test result, the partial hollow design of the foam plastic part 1 is carried out to form a hollow part.

Further, the design method further comprises: the foam members 1 are designed with a coupling structure so that a plurality of foam members 1 are coupled to each other through the coupling structure. Wherein the connecting structure includes but is not limited to: a clamping groove, a slot, a connecting hole and the like.

An embodiment of the packaging structure 100 of the embedded steam box will be described.

The traditional packaging materials for household electrical appliances comprise EPS foam plastics, EPE pearl cotton, paper pulp molding and the like. Among them, EPS foam is widely used as a packaging material because of its good cushioning property and lower production cost. The EPS foam packaging development process for the product comprises the steps of three-dimensional packaging design, mold manufacturing of a mold factory, production (material preparation, foaming and curing) of a foam factory and the like.

With the further control of the product end on the packaging cost, the requirement of higher packaging material cost reduction is raised. The existing EPS foam packaging cost reduction mode is characterized in that the packaging appearance is optimized and the area with small stress is hollowed, so that partial materials are saved and the packaging cost is reduced.

Generally, high density foams are suitable for heavier products and low density foams for lighter products, and therefore there is also a cost reduction by matching the overall density of the package to the most suitable density for the shape and mass of the product.

However, both EPS foam packages fall into this design and both have their design limits. For example: excessive hollowing can cause structural strength to be reduced, and the buffering effect of the structure is influenced; the same problem is caused by an overall too low density, which results in design defects and failure of internal testing.

The embodiment provides a brand-new EPS foam package design method, and through the design of variable density foam packages, the density and the weight of the packaging structure 100 can be optimized on the basis of the original packaging structure 100, the existing design limit is broken through, the overall cost of the package is further reduced, the weight of the foam package is reduced by more than 10% on the basis of the original scheme, and further the packaging cost is reduced, so that more economic benefits are brought to enterprises.

Specifically, the design method is improved on the basis of the original packaging structure 100, and the overall weight of the package is reduced under the condition of unchanged volume through designing different densities in different areas, so that the cost is reduced.

The following describes a packaging structure of a conventional steam box in comparison with the packaging structure of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of the matching between a to-be-packaged object 2 '(specifically, an embedded steam box) and a foam plastic part 1' (original packaging structure 100). Under the working condition of falling, a product always has a region with large stress and a region with small stress, the region with large stress requires high foam density, sufficient strength and good buffering performance, and the region with small stress does not have the requirement. However, in order to ensure sufficient cushioning performance of the large-stress area, the original design method designs the same density foam in all areas, which causes the cost of the scheme to be increased.

As shown in fig. 4, in order to solve the above problem, the original scheme is partitioned and the density is optimized on the basis of the original scheme. High density foam is designed in areas subjected to high forces, while low density foam is designed in areas subjected to low forces. Therefore, the continuity of the whole structure is ensured, and the sufficient buffer performance of the high-density area is ensured, so that the whole packaging cost is reduced.

Particularly, the original well-matched density is kept in a region with large stress so as to ensure that the region with large stress has sufficient buffering performance; the density is reduced in the area with small stress, so that the weight is reduced, and the purpose of reducing the cost is realized.

As shown in fig. 9, 10 and 11, the packing structure 100 of the built-in steam box includes two foam plastic members 1, which are referred to as upper foam and lower foam, respectively. In the prior art, two foams are designed in a traditional single density mode, and after actual drop tests, the areas with high damage risk are found to be four corners and edges, and the damage risk of other areas is small.

As shown in fig. 2 and 3, the following foam is taken as an example, the original scheme has been subjected to a partial hollowed-out design and a density matching design, thereby controlling a certain packaging cost, but not a cost-optimal scheme.

As shown in fig. 7 and 8, after the density-variable design, the four corners are divided, the four corner regions are designed to be the higher density foam, and the other regions are designed to be the lower density foam (specifically, the density of the other regions is reduced, and the density of the four corner regions is maintained as designed). And further entrusting a mould supplier to develop and design the mould to obtain the variable-density finished foam, and completing test and verification. The test result meets the requirements, the scheme is successfully verified, and the foam cost is reduced by 13 percent on the basis of the original scheme.

It should be noted that the density distribution of the finished foam part actually produced does not necessarily correspond to the design, and there may be a transition region between the second foam part 112 in the high density region and the first foam part 111 in the low density region, so as to ensure the continuity of the whole structure, such as the transition foam part 113 shown by the box in fig. 6.

The specific density should be designed reasonably by combining the shape and quality of the object to be packaged 2 and the current foam production technology level, so as to ensure the formability of the foam plastic part 1 and the overall performance of the foam plastic part 1.

Of course, the partition mode of the foam plastic part 1 is not limited to four-corner partition, and other partition modes can be provided, and the partition mode can be designed reasonably according to the design idea of a designer, the actual test result and the actual mold manufacturing level.

The actual variable density design is not limited to a combination of two densities, and there may be three or more density combinations, specifically taking into account the combination of the mold manufacturing level and the foam production cost.

From this, this application breaks through the limit of current EPS foam packing design to the production is urged in the design, has further optimized foam packing's cost, under the intensity that does not influence packaging structure 100 and the prerequisite of buffer performance, effectively reduces foam cost more than 10%, brings more economic benefits for the enterprise.

To sum up, the design of variable density packing has been adopted to packaging structure, electrical equipment and packaging structure's that this application provided design method, can optimize packaging structure's density and quality on original packaging structure's basis, breaks through current design limit, further reduces packaging structure's overall cost to bring more economic benefits for the enterprise. Particularly, under the working condition of falling, a region with large stress and a region with small stress always exist in the product, the region with large stress requires high foam density, sufficient strength and good buffering performance, and the region with small stress does not have the requirement. However, in the original design method, in order to ensure that the cushioning performance of the area with large stress is sufficient, the foam with the same density is designed in all the areas, so that the scheme cost is increased. The foam plastic part comprises at least two foam plastic parts, and because the densities of the adjacent foam plastic parts are different, one foam plastic part adopts a mode of combining a plurality of densities instead of the single density in the prior art, so that the foam plastic part correspondingly has a plurality of stress areas and the acting forces suitable for bearing by the adjacent stress areas are different. Therefore, the stressed area with large stress corresponds to the foam plastic part with high density, and the sufficient buffering performance of the area can be ensured so as to meet the test requirement and the use requirement; and the stress area with small stress corresponds to the foam plastic part with small density, so that the weight and the cost of the packaging structure can be reduced compared with the prior art. In other words, the variable density design mode not only ensures that the high-density stressed area has sufficient buffer performance, but also reduces the whole weight of the package, thereby reducing the whole package cost.

In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A packaging structure, comprising:

the foam plastic part comprises at least two foam plastic parts, and the density of the adjacent foam plastic parts is different, so that the foam plastic part is provided with at least two stress areas, and the adjacent stress areas are suitable for bearing different acting forces.

2. The packaging structure of claim 1, wherein the at least two foam sections comprise:

at least one first foam portion;

at least one second foam portion connected to the first foam portion and having a density greater than the density of the first foam portion.

3. The packaging structure of claim 2, wherein the at least two foam sections further comprise:

the transition foam plastic part is positioned between the first foam plastic part and the second foam plastic part and connected with the first foam plastic part and the second foam plastic part, and the density of the transition foam plastic part is greater than that of the first foam plastic part and less than that of the second foam plastic part.

4. The packaging structure according to claim 2 or 3,

the foam piece has a corner, the corner being constructed by the second foam portion.

5. The packaging structure according to claim 2 or 3,

the foam plastic part is of a polygonal structure, and at least one part of the edge of the polygonal structure is constructed by the second foam plastic part.

6. The packaging structure of any one of claims 1 to 3, wherein the foam piece further comprises:

a hollowed-out portion, the hollowed-out portion penetrating through the foam piece.

7. The packaging structure of claim 6,

the at least two foam portions are located in a peripheral region of the hollowed-out portion.

8. The packaging structure of claim 7,

the hollow-out part is arranged around the first foamed plastic part of the foamed plastic part, and the plurality of second foamed plastic parts of the foamed plastic part are arranged along the circumferential direction of the first foamed plastic part and are connected with the first foamed plastic part.

9. The packaging structure according to any one of claims 1 to 3,

the foam plastic piece is polystyrene foam plastic piece.

10. The packaging structure according to any one of claims 1 to 3,

the foam plastic part is of an integrated structure.

11. The packaging structure according to any one of claims 1 to 3,

the number of the foam plastic pieces is multiple, and the multiple foam plastic pieces are suitable for enclosing a packaging space matched with the object to be packaged.

12. The packaging structure of claim 11,

a plurality of said foam elements being independent of each other; or

At least some of the foam elements are interconnected.

13. An electrical device, comprising:

an electrical appliance; and

the packaging structure of any one of claims 1 to 12, adapted to the appliance for packaging the appliance.

14. A method of designing a packaging structure, comprising:

acquiring the stress distribution condition of the foam plastic part of the packaging structure in a drop test;

dividing the foam plastic part into at least two stress areas according to the stress distribution condition, wherein the adjacent stress areas are different in the applied force suitable for bearing;

and determining the density of the corresponding foamed plastic parts according to the stress magnitude of the stress areas, so that the foamed plastic part comprises at least two foamed plastic parts, and the densities of the adjacent foamed plastic parts are different.

15. The method of designing a packaging structure according to claim 14,

the design method of the packaging structure further comprises the following steps: acquiring a basic design version of the packaging structure, wherein the foam plastic part designed by the basic design version is a foam plastic part with single density;

the process of determining the density of the corresponding foamed plastic parts according to the stress magnitude of the stress areas so that the foamed plastic part comprises at least two foamed plastic parts and the density magnitudes of the adjacent foamed plastic parts are different comprises the following steps:

the improvement is made on the basis of the basic design version, and the density of the stress area with relatively smaller stress in the adjacent stress area is reduced, so that the foamed plastic piece comprises at least two foamed plastic parts, and the density of the adjacent foamed plastic parts is different.