A cushioning packaging structure and an electrical appliance packaging method

Abstract

This invention relates to the field of electrical appliance packaging technology, specifically to a cushioning packaging structure and a method for packaging electrical appliances. The cushioning packaging structure includes an outer layer and an inner layer, the inner layer being disposed opposite to the outer layer. A core layer is provided between the inner and outer layers. The core layer comprises polyurethane foam composed of isocyanate and polyol. When the core layer is pressed, the polyurethane foam expands and provides support between the inner and outer layers. This cushioning packaging structure can expand into a cushioning material to protect the product under pressure, offering advantages such as easy packaging and high flexibility.

Description

Technical Field

[0001] This invention relates to the field of electrical appliance packaging technology, specifically to a cushioning packaging structure and an electrical appliance packaging method. Background Technology

[0002] Cushioning packaging, also known as shockproof packaging, plays a vital role among various packaging methods. From production to use, products undergo a series of transportation, storage, stacking, and loading / unloading processes, placing them in specific environments. In any environment, forces act upon the product, potentially causing mechanical damage. To prevent damage, it's essential to minimize the impact of external forces. Cushioning packaging refers to protective measures taken to mitigate the impact and vibration on the contents, protecting them from damage.

[0003] Currently, for larger household appliances, such as large upright cabinets, the main packaging method involves adding four side foam strips, a top cover, a base, and an outermost box to the outside of the main plastic bag.

[0004] However, both the side strips and the top cover of the packaging require separate molds and foaming processes, which undoubtedly increases production costs. The increased foam volume after foaming significantly reduces transportation and storage space. The side strips are typically thin and long, making them prone to breakage during handling and packing, and their excessive length hinders packing operations. The foam protection area needs to be proportional to the foam foaming mold, resulting in oversized molds. Furthermore, the foam protection requires the use of tape for fixation, increasing the complexity of packaging operations. Summary of the Invention

[0005] One of the objectives of this invention is to overcome the shortcomings of the prior art by providing a cushioning packaging structure that can expand into a cushioning material to protect the product when pressure is applied, and has the advantages of easy packaging and high flexibility.

[0006] The second objective of this invention is to provide an electrical appliance packaging method.

[0007] To achieve one of the above objectives, the present invention provides the following technical solution:

[0008] A cushioning packaging structure is provided, comprising:

[0009] outer layer,

[0010] An inner layer is provided between the inner and outer layers, which are opposite to the outer layer.

[0011] The core layer comprises polyurethane foam, which includes component A and component B. When the core layer is pressed, components A and B in the polyurethane foam mix and expand, providing support between the inner and outer layers.

[0012] In some embodiments, the outer layer is an outer bag layer, the inner layer is an inner bag layer, the inner bag layer is fitted over the outer bag layer, the inner bag layer and the outer bag layer constitute a packaging bag, and the core layer is filled in the space between the outer bag layer and the inner bag layer.

[0013] In some embodiments, the outer side of the outer bag layer faces outward, the inner side of the outer bag layer is opposite to the outer side of the inner bag layer, and the inner side of the inner bag layer is used to cover the product.

[0014] The core layer is filled in a designated position between the outer bag layer and the inner bag layer, and the designated position is a collision-prone area.

[0015] In some embodiments, both the outer bag layer and the inner bag layer are plastic bags, and the outer surface of the outer bag layer is a plastic bubble surface;

[0016] Material A is isocyanate, and material B is polyol.

[0017] In some embodiments, the outer side of the inner bag layer is provided with a groove, and the core layer is embedded in the groove to be positioned on the outer side of the inner bag layer.

[0018] In some embodiments, the core layer is further provided with a plurality of micropores, and the isocyanate and the polyol are respectively filled in the micropores, with the isocyanate and the polyol disposed adjacent to each other.

[0019] In some embodiments, the inner bag layer is configured to conform to the shape of the product, and the outer bag layer is a cold-stretched plastic film layer.

[0020] In some embodiments, the inner bag layer and / or the outer bag layer are provided with venting holes.

[0021] The beneficial effects of the cushioning packaging structure of the present invention are as follows:

[0022] (1) The cushioning packaging structure of the present invention has a core layer between the inner layer and the outer layer. The core layer includes polyurethane foam. When pressure is applied to the polyurethane foam, the A and B components in the polyurethane foam will expand after mixing, causing the position between the inner layer and the outer layer to expand and thus produce a cushioning effect. Since the required core layer position can be arranged according to the easily impacted position, it is not necessary to fill the entire packaging structure with polyurethane foam, which can save the amount of material used to the maximum extent and reduce the cost.

[0023] (2) The cushioning packaging structure of the present invention can form the required protective area and protective configuration by adjusting the filling position, which overcomes the problem of traditional molds for producing protective configurations, improves production efficiency, avoids the problem of foaming by off-site molds, and the problem of large space occupation for turnover and storage, and can flexibly set the core layer position.

[0024] (3) The cushioning packaging structure of the present invention has a core layer (polyurethane foam) set in the inner layer and the outer layer. The inner layer, the outer layer and the polyurethane foam are not set separately. Therefore, there is no need to fix the core layer with cushioning effect separately during packaging, which improves the packaging efficiency and also overcomes the problem that the traditional packaging side strips are thin and long and easy to break.

[0025] (4) The buffer packaging structure of the present invention has a polyurethane foam material in the core layer that can expand and stretch. When the polyurethane foam material in the core layer expands, it can tightly wrap the product, reduce the need for tape to fix the packaging, and further improve the packaging efficiency.

[0026] To achieve the second objective mentioned above, the present invention provides the following technical solution:

[0027] An electrical appliance packaging method is provided, comprising the following steps:

[0028] The above-described cushioning packaging structure is adopted;

[0029] Place the packaging bag over the appliance to be packaged.

[0030] Pressing the outer bag layer causes the isocyanate and polyol in the polyurethane foam in the core layer to flow out and mix together. The polyurethane foam expands and fills the space between the outer bag layer and the inner bag layer, achieving a cushioning effect.

[0031] In some implementations, a production line is also used, on which a rotatable packaging base is provided;

[0032] A pressure plate is provided on the periphery of the packaging base;

[0033] The appliance to be packaged is placed on the packaging base. After the appliance is put into the packaging bag, the pressure plate is driven to approach the packaging bag until the pressure plate presses the outer bag layer.

[0034] After one press, rotate the packaging base so that the pressure plate presses on other parts of the packaging bag, thus expanding the entire packaging bag.

[0035] The beneficial effects of the electrical appliance packaging method of the present invention are as follows:

[0036] The present invention discloses an electrical appliance packaging method in which a packaging bag is inserted into the electrical appliance. By pressing the outer layer of the packaging bag, a reaction force is generated on the surface of the electrical appliance, causing the isocyanate and polyol in the polyurethane foam material in the core layer between the outer and inner layers of the packaging bag to mix and thus produce an expansion effect, thereby generating a cushioning effect. This overcomes the problem of the traditional method of packaging side strips separately onto the electrical appliance, which is cumbersome. Furthermore, before the packaging bag expands, it occupies less space, reducing storage space and facilitating the movement of the packaging bag. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the outer layer, core layer, and inner layer of a specific embodiment of the present invention.

[0038] Figure 2 This is a top view of the cushioning packaging structure according to a specific embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the structure of the outer bag layer in a specific embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of the inner bag layer according to a specific embodiment of the present invention.

[0041] Figure 5 yes Figure 4 A schematic diagram of the structure at point A in the middle.

[0042] Figure 6 This is a schematic diagram of the working state structure of the production line according to a specific embodiment of the present invention.

[0043] Figure 7 This is a flowchart of an electrical appliance packaging method according to a specific embodiment of the present invention.

[0044] Figure label:

[0045] 1. Outer layer; 2. Inner layer; 3. Core layer; 4. Polyurethane foam material; 41. Material A; 42. Material B; 5. Outer bag layer; 6. Inner bag layer; 7. Packaging bag; 8. Insertion groove; 9. Micropore; 11. Packaging base; 12. Press plate; 13. Production line; 14. Plastic bubble; 15. Foaming space. Detailed Implementation

[0046] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0047] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” as used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0048] Cushioning packaging, also known as shockproof packaging, plays a vital role among various packaging methods. From production to use, products undergo a series of transportation, storage, stacking, and loading / unloading processes, placing them in specific environments. In any environment, forces act upon the product, potentially causing mechanical damage. To prevent damage, it's essential to minimize the impact of external forces. Cushioning packaging refers to protective measures taken to mitigate the impact and vibration on the contents, protecting them from damage.

[0049] Currently, for larger household appliances, such as large upright cabinets, the main packaging method involves adding four side foam strips, a top cover, a base, and an outermost box to the outside of the main plastic bag.

[0050] However, both the packaging side strips and the packaging top cover require separate molds and foaming processes, which undoubtedly increases production costs. The increased foam volume after foaming significantly wastes transportation and storage space. Packaging side strips are typically thin and long, making them prone to breakage during handling and packing insertion, and their excessive length hinders packing operations. The foam protection area needs to be proportional to the foam foaming mold, resulting in excessively large mold sizes. Furthermore, the foam protection requires the use of tape for fixation, increasing the complexity of packaging operations. To address these technical problems, the following embodiments are provided.

[0051] Example 1

[0052] Please see Figure 1 The cushioning packaging structure disclosed in this embodiment includes:

[0053] Outer layer 1,

[0054] Specifically, the outer layer 1 is a surface located on the outside;

[0055] Inner layer 2, which is disposed opposite to outer layer 1, and a core layer 3 is provided between inner layer 2 and outer layer 1.

[0056] Specifically, the inner layer 2 is aligned with the outer layer 1, with a certain space between them. The core layer 3 is then placed between the inner layer 2 and the outer layer 1, so that the core layer 3 can be positioned between the inner layer 2 and the outer layer 1, thus preventing unnecessary displacement of the core layer 3.

[0057] For example, the core layer 3 can be fixedly attached between the inner layer 2 and the outer layer 1; the core layer 3 can also be filled in the position between the inner layer 2 and the outer layer 1 without being fixed, as long as there is enough space between the inner layer 2 and the outer layer 1.

[0058] In this embodiment, the core layer 3 includes polyurethane foam 4, which comprises isocyanate (component A 41) and polyol (component B 42). In practical applications, component A 41 and component B 42 can also be other components, as long as they can cause the polyurethane foam 4 to expand. When the core layer 3 is pressed, the polyurethane foam 4 expands and is supported between the inner layer 2 and the outer layer 1.

[0059] Specifically, polyurethane foam 4 is commercially available. Polyurethane foam 4 consists of two components: component A is a polyol, and component B is an isocyanate. When components A and B are mixed, they will foam and solidify within one minute. Traditionally, polyurethane foam 4 is mostly used for building insulation. In this embodiment, when pressure is applied to polyurethane foam 4, the isocyanate and polyol in polyurethane foam 4 will mix and undergo a foaming reaction. The foamed polyurethane foam 4 will expand and support itself between the inner layer 2 and the outer layer 1. Because the expanded polyurethane foam 4 has a cushioning effect, the entire cushioning packaging structure will expand when polyurethane foam 4 expands.

[0060] The aforementioned cushioning packaging structure features a core layer 3 between the inner layer 2 and the outer layer 1. The core layer 3 comprises polyurethane foam 4. When pressure is applied to the polyurethane foam 4, it expands, causing the area between the inner layer 2 and the outer layer 1 to expand and thus creating a cushioning effect. Because the core layer 3 can be positioned according to the areas prone to impact, the entire packaging structure does not need to be filled with polyurethane foam 4, maximizing material savings and reducing costs. By adjusting the filling position, the required protective area and configuration can be formed, overcoming the problem of traditional mold-based production of protective configurations, improving production efficiency, and avoiding the issues of off-site mold foaming, large space requirements for turnover and storage. The core layer 3 position can be flexibly set. The core layer 3 (polyurethane foam 4) is located within the inner layer 2 and the outer layer 1; the inner layer 2, outer layer 1, and polyurethane foam 4 are not separately installed. Therefore, there is no need to separately install a cushioning core layer 3, improving packaging efficiency and overcoming the problem of traditional packaging side strips being thin and prone to breakage. The polyurethane foam 4 in the core layer 3 can expand and shrink. When the polyurethane foam 4 in the core layer 3 expands, it can tightly wrap the product without the need for additional tape, which further improves packaging efficiency.

[0061] In addition, in order to stably connect the outer layer 1 and the inner layer 2 together, the opposite surfaces between the inner layer 2 and the outer layer 1 can be partially connected, while the remaining space between the inner layer 2 and the outer layer 1 can be filled with the core layer 3.

[0062] Example 2

[0063] Please see Figure 2 Since the inner layer 2 and the outer layer 1 merely form a buffer surface, in order for the buffer structure to better cover the product, the inner layer 2 and the outer layer 1 need to be constructed in a configuration that adapts to the product's shape. Therefore, based on Embodiment 1, this embodiment discloses that the outer layer 1 is constructed as an outer bag layer 5, the inner layer 2 is constructed as an inner bag layer 6, the inner bag layer 6 is fitted into the outer bag layer 5, the inner bag layer 6 and the outer bag layer 5 constitute a packaging bag 7, and the core layer 3 is filled in the space between the outer bag layer 5 and the inner bag layer 6.

[0064] Specifically, the inner layer 2 and the outer layer 1 are respectively constructed into corresponding bag shapes, that is, the outer layer 1 is constructed as an outer bag layer 5, and the inner layer 2 is constructed as an inner bag layer 6. At this time, by inserting the inner bag layer 6 into the outer bag layer 5, a space for filling the core layer 3 is formed between the inner bag layer 6 and the outer bag layer 5. The inner bag layer 6 and the outer bag layer 5 combined will form a packaging bag 7 structure. When it is a packaging bag 7 structure, the packaging bag 7 can directly cover the product to achieve the protective effect of the product.

[0065] Furthermore, to illustrate how to construct the inner bag layer 6 and the outer bag layer 5 that are stably connected together, by way of example, certain points on the opposite surfaces of the inner layer 2 and the outer layer 1 are now connected by using double-sided pressure-sensitive adhesive, thereby effectively fixing the inner bag layer 6 and the outer bag layer 5 together.

[0066] For example, both the inner two bags and the outer one bag are constructed as cubes for packaging cube-shaped products, such as refrigerators.

[0067] Example 3

[0068] Please see Figures 1-2 Since not all locations will experience significant collisions during transportation, areas where no collisions occur will not require cushioning. This saves material and reduces the space occupied by the overall cushioning structure. Therefore, based on Embodiment 2, this embodiment discloses that the outer surface of the outer bag layer 5 faces outward, and the inner surface of the outer bag layer 5 is opposite to the outer surface of the inner bag layer 6, with the inner surface of the inner bag layer 6 used to cover the product.

[0069] The core layer 3 is filled in a designated position between the outer bag layer 5 and the inner bag layer 6, and the designated position is a position prone to collision.

[0070] Specifically, certain locations are prone to collisions, so polyurethane foam 4 is placed at these locations. In this case, the positions in the packaging bag 7 where polyurethane foam 4 is placed will have a high anti-collision effect. That is, discontinuous buffer spaces are randomly set according to the areas that are prone to bumps during product transportation, and foam is formed to form a protective buffer. This can effectively reduce the amount of foam used and avoid the problem of large space occupation during turnover and storage.

[0071] For example, in the packaging bag 7, the four corners are generally prone to collisions. Therefore, polyurethane foam 4 is placed at the four corners of the four packaging bags 7, so that the four corners of the packaging bag 7 have a high anti-collision effect.

[0072] Example 4

[0073] Please see Figure 3 To further enhance the cushioning effect, both the inner layer 2 and the outer layer 1 can be further improved. Therefore, based on Embodiment 1, this embodiment discloses that both the outer bag layer 5 and the inner bag layer 6 are plastic bags, and the outer surface of the outer bag layer 5 is a plastic bubble 14 surface.

[0074] Specifically, both the outer bag layer 5 and the inner bag layer 6 are made of plastic bags, and the surface of both the outer bag layer 5 and the inner bag layer 6 are made of plastic bubble wrap 14, which effectively provides cushioning. Furthermore, this bubble wrap 14 is a commonly used bubble wrap surface in the market.

[0075] Example 5

[0076] Please see Figures 3-4 If the core layer 3 is simply placed between the inner layer 2 and the outer layer 1, it will easily shift. Furthermore, simply filling the space between the inner layer 2 and the outer layer 1 with the core layer 3 alone is not easy to operate; otherwise, the inner layer 2 and the outer layer 1 would need to be opened. Therefore, based on embodiment 4, this embodiment discloses that the outer surface of the inner bag layer 6 is provided with a groove 8, and the core layer 3 is embedded in the groove 8 to be positioned on the outer surface of the inner bag layer 6.

[0077] Specifically, during the injection molding of the inner bag layer 6, a groove 8 is formed on the outer surface of the inner bag layer 6. Subsequently, the core layer 3 is embedded in the groove 8. Specifically, the core layer 3 is bonded to the groove 8 with adhesive, so that the core layer 3 is positioned on the outer surface of the inner bag layer 6. When the outer surface of the inner bag layer 6 is relatively close to the inner surface of the outer bag layer 5, the core layer 3 will be located between the inner bag layer 6 and the outer bag layer 5 along with the outer surface of the inner bag layer 6, so as to achieve convenient and quick installation of the core layer 3.

[0078] For example, the outer side of the inner bag layer 6 is provided with a number of grooves 8, and the grooves 8 are aligned and arranged. At this time, the core layer 3 is strip-shaped and embedded in the grooves 8.

[0079] Example 6

[0080] Please see Figure 5 Since the polyurethane foam 4 is a two-component material, and the two components need to be mixed together to achieve expansion, in order to enable the two components in the polyurethane foam 4 to be mixed together efficiently, based on Example 5, this embodiment discloses that the core layer 3 is also provided with a plurality of micropores 9, the isocyanate and the polyol are respectively filled in the micropores 9, and the isocyanate and the polyol are arranged adjacent to each other.

[0081] Specifically, the core layer 3 is a plastic sheet layer. During injection molding of the core layer 3, several micropores 9 are formed on the core layer. Isocyanates and polyols are filled into the individual micropores 9. After filling with the isocyanates and polyols, a thin film is applied to the openings of the micropores 9. This thin film can be made of glutinous rice paste. The isocyanates and polyols are arranged adjacent to each other to facilitate rapid mixing.

[0082] For example, a core layer 3 is placed in each groove 8 on the outer side of the inner bag layer 6, and each core layer 3 has two rows of micropores 9, one row of micropores 9 being filled with isocyanate and the other row of micropores 9 being filled with polyol.

[0083] Furthermore, each six rows of micropores 9 in each core strip form a group of micropores 9, and there is a certain distance between adjacent groups of micropores 9. This distance facilitates the connection between the outer side of the inner bag layer 6 and the inner side of the outer bag layer 5.

[0084] Example 7

[0085] Please see Figure 2 In order for the packaging bag 7 to better cover the product, it is necessary to set the packaging bag 7 in a certain shape and to make the packaging bag 7 tightly cover the product. Therefore, based on Embodiment 1, this embodiment discloses that the inner bag layer 6 is constructed in a shape adapted to the product, and the outer bag layer 5 is a cold-stretched plastic film layer.

[0086] Specifically, when setting the inner bag layer 6, it is first set according to the product configuration. Therefore, the inner bag layer 6 can be bonded to the outer layer 1 to form foam spaces 15 of different shapes according to the specific product protection. The foam space 15 can be continuous or discontinuous and arbitrary, which can increase the effective buffer protection area with less foam material.

[0087] For example, the inner bag layer 6 is set in a cubic shape. Then, the outer bag layer 5 is made of cold-stretch plastic film, which facilitates the stretching and contraction of the outer bag layer 5, making it easier to tightly wrap the corresponding product. Therefore, when the polyurethane foam 4 expands, it can support the entire inner bag layer 6, allowing the inner bag layer 6 to wrap around the product according to the preset configuration. At the same time, the stretchable and puncture-resistant film of the outer bag layer 5 acts as a shrinkage agent, wrapping the entire product and improving its effectiveness.

[0088] Example 8

[0089] Because the isocyanate and polyol in the polyurethane foam 4 generate heat when mixed, and gas is expelled during the expansion process, this embodiment discloses that the inner bag layer 6 and / or the outer bag layer 5 are provided with vent holes, based on Example 1.

[0090] Specifically, certain vent holes are provided on the inner bag layer 6 and the outer bag layer 5, with the diameter of the vent holes ranging from 1 to 5 mm. The vent holes allow the gas generated during the polyurethane foaming process of the inner bag layer 6 and the outer bag layer 5 to escape, which serves two purposes: heat dissipation and preventing the entire packaging bag 7 from being crushed.

[0091] Example 9

[0092] Please see Figures 6-7 To further illustrate the application of the cushioning packaging structure of the present invention in the product packaging process, this embodiment discloses an electrical appliance packaging method based on the disclosed cushioning packaging structure, including the following steps:

[0093] The packaging adopts a cushioning structure. The outer layer 1 is constructed as an outer bag layer 5, and the inner layer 2 is constructed as an inner bag layer 6. The inner bag layer 6 is inserted into the outer bag layer 5, and the inner bag layer 6 and the outer bag layer 5 constitute a packaging bag 7. The core layer 3 is filled in the position between the outer bag layer 5 and the inner bag layer 6. The core layer 3 includes polyurethane foam 4, which is composed of isocyanate and polyol.

[0094] Place the packaging bag 7 onto the appliance to be packaged.

[0095] Pressing the outer bag layer 5 causes the isocyanate and polyol in the polyurethane foam 4 on the core layer 3 to flow out and mix together. The polyurethane foam 4 expands and fills the space between the outer bag layer 5 and the inner bag layer 6, achieving a cushioning effect.

[0096] Specifically, the robotic arm pulls the opening of the packaging bag 7, pulls the packaging bag 7 open, and puts it on the electrical appliance from top to bottom, thus covering the electrical appliance with the packaging bag 7. At this time, by pressing the packaging bag 7, the isocyanate and polyol in the polyurethane foam 4 can flow out and mix together, producing a cushioning effect.

[0097] Furthermore, the appliance in question is a refrigerator.

[0098] The above-mentioned electrical appliance packaging method involves inserting the packaging bag 7 into the electrical appliance. By pressing the outer bag layer 5 of the packaging bag 7, a reaction force is generated on the surface of the electrical appliance, causing the isocyanate and polyol in the polyurethane foam 4 in the core layer 3 between the outer bag layer 5 and the inner bag layer 6 to mix and generate an expansion effect, thereby producing a cushioning effect. This overcomes the problem of the traditional method of packaging side strips separately onto the electrical appliance, which is cumbersome in terms of packaging operation. Furthermore, before the packaging bag 7 expands, it occupies less space, reducing storage space and facilitating the movement of the packaging bag 7.

[0099] Example 10

[0100] Please see Figures 6-7 In order to realize intelligent production in one step, it is necessary to realize packaging on production line 13. Therefore, based on embodiment 9, production line 13 is also adopted, and a rotating packaging base 11 is set on production line 13.

[0101] A pressure plate 12 is provided on the periphery of the packaging base 11;

[0102] The appliance to be packaged is placed on the packaging base 11. After the appliance is put into the packaging bag 7, the pressure plate 12 is driven to approach the packaging bag 7 until the pressure plate 12 presses the outer bag layer 5.

[0103] After one press, rotate the packaging base 11 so that the pressure plate 12 presses on other parts of the packaging bag 7, thereby expanding the entire packaging bag 7.

[0104] Specifically, a packaging base 11 is installed on the moving production line 13. The packaging base 11 is rotated by a motor, and electrical appliances are placed on the packaging base 11. Since the pressure plate 12 is located on the periphery of the packaging base 11, as long as the pressure plate 12 is close to the packaging base 11, it can press the packaging bag on the product on the packaging base 11, causing the isocyanate and polyol in the polyurethane foam 4 in the core layer 3 between the outer bag layer 5 and the inner bag layer 6 to mix and produce an expansion effect, thereby generating a cushioning effect.

[0105] After one side is pressed and expanded, the packaging base 11 rotates 90°, causing the pressure plate 12 to press on other parts of the packaging bag 7, thus achieving automated operation to create a cushioning effect for the entire packaging bag 7.

[0106] For example, please refer to Figures 6-7 Perform the following packaging steps:

[0107] S1. Place the refrigerator on the packaging base 11.

[0108] S2. The cushioning packaging bag 7 is put on, and the robot arm pulls the opening of the packaging bag 7 and pulls it open to put it on the refrigerator from top to bottom; the opening of the bag is widened by the robot arm so that it is larger than the packaging base 11, the robot arm is withdrawn, and the opening of the packaging bag 7 shrinks to wrap around the packaging base 11.

[0109] S3. The production line 13 is equipped with front and rear clamping plates, which are retracted to squeeze the front and rear sides of the refrigerator.

[0110] The feed line is equipped with a steering device that drives the base to rotate. As the base rotates, the refrigerator turns 90 degrees and repeats the process, effectively protecting all four sides of the refrigerator.

[0111] S4. Pressure plates 12 are installed at the tail end and top of the production line 13 to repeat the above extrusion process and form top protection;

[0112] Before top compression, apply the packing strap. The polyurethane foam 4 will form a groove at the packing strap position to hold the packing strap in place, preventing the packing strap from damaging the polyurethane foam 4 and reducing the risk of the packing strap slipping off.

[0113] Package and store in the warehouse.

[0114] The cushioning packaging bag 7 of this application has a simple structure. It integrates various cushioning materials required for the outer layer 1 of the refrigerator. Discontinuous cushioning spaces can be set at will according to the areas prone to bumps during product transportation, and foamed into cushioning foam to form protection. It can effectively reduce the amount of foam used, increase the effective protective area, and avoid the problems of large space occupation during turnover and storage caused by off-site mold foaming.

[0115] This application discloses a cushioning packaging bag 7, comprising an outer layer 1, an inner layer 2, and a bubble layer disposed between the inner layer 2 and the outer layer 1. The outer layer 1 is a whole-machine plastic bag directly covered onto the surface of the refrigerator; the bubble layer between the inner and outer layers 1 has adjacent bubbles filled with foaming materials A and B required for polyurethane foaming at appropriate gaps; after the bubbles rupture under pressure, the A and B contacts and a foaming reaction occurs. The inner layer 2 includes N A and B bubble units according to a preset shape, forming a specific cushioning material. The cushioning packaging bag 7 of this application has a simple structure, integrating various cushioning materials required for the outer layer 1 of the refrigerator, avoiding the problems of external mold foaming and large space occupation during turnover and storage.

[0116] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0117] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0118] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0119] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0120] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cushioning packaging structure characterized by, The application relates to a buffer packaging structure, which comprises the following parts: an outer layer (1), an inner layer (2) opposite to the outer layer (1), and a core layer (3) arranged between the outer layer (1) and the inner layer (2), the core layer (3) comprises polyurethane foaming material (4) which comprises A material (41) and B material (42), when the core layer (3) is pressed, the A material (41) and the B material (42) in the polyurethane foaming material (4) are mixed, expanded and supported at a position between the inner layer (2) and the outer layer (1), the outer layer (1) is configured as an outer bag layer (5), the inner layer (2) is configured as an inner bag layer (6), the inner bag layer (6) is sleeved in the outer bag layer (5), the inner bag layer (6) and the outer bag layer (5) form a packaging bag (7), and the core layer (3) is filled in a position between the outer bag layer (5) and the inner bag layer (6), the outer bag layer (5) and the inner bag layer (6) are plastic bags, and the outer side of the outer bag layer (5) is a plastic bubble (14) surface, the A material (41) is isocyanate, and the B material (42) is polyhydric alcohol, the outer side of the inner bag layer (6) is provided with a groove (8), and the core layer (3) is embedded in the groove (8) and positioned on the outer side of the inner bag layer (6), the core layer (3) is further provided with a plurality of micropores (9), the isocyanate and the polyhydric alcohol are filled in the micropores (9) respectively, and the isocyanate and the polyhydric alcohol are arranged adjacently.

2. The cushioning packaging structure of claim 1, wherein The outer side of the outer bag layer (5) faces outward, the inner side of the outer bag layer (5) is opposite to the outer side of the inner bag layer (6), and the inner side of the inner bag layer (6) is used for wrapping products, the core layer (3) is filled in a specified position between the outer bag layer (5) and the inner bag layer (6), and the specified position is a position which is easy to collide.

3. The cushioning packaging structure of claim 1, wherein The inner bag layer (6) is configured in a shape suitable for products, and the outer bag layer (5) is a cold-stretching plastic film layer.

4. The cushioning packaging structure of claim 1, wherein The inner bag layer (6) and / or the outer bag layer (5) is provided with an exhaust hole.

5. A method of packaging an electrical appliance, characterized in that, The application further comprises the following steps: adopting the buffer packaging structure in any one of claims 2-4, sleeving the packaging bag (7) on an electric appliance to be packaged, pressing the outer bag layer (5) to make the A material (41) and the B material (42) in the polyurethane foaming material (4) on the core layer (3) flow out and mix together, and the polyurethane foaming material (4) expands and is filled in a position between the outer bag layer (5) and the inner bag layer (6).

6. The method of packaging an electrical appliance of claim 5, wherein, a production line (13) is further adopted, and a rotatable packaging base (11) is arranged on the production line (13); a pressing plate (12) is arranged on the periphery of the packaging base (11); an electric appliance to be packaged is placed on the packaging base (11), when the electric appliance is sleeved in the packaging bag (7), the pressing plate (12) is driven to approach the packaging bag (7) until the pressing plate (12) presses the outer bag layer (5); after one pressing is completed, the packaging base (11) is rotated to make the pressing plate (12) press other positions of the packaging bag (7), and the whole packaging bag (7) is expanded.

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