Packaging plate

By setting steps, grooves, or protrusions on the side of the packaging board, the cut surface is ensured to be parallel to the surface, thus solving the cutting error and inspection problems in the compressor packaging board cutting process, achieving efficient and reliable cutting flatness and simplified inspection.

CN224184804UActive Publication Date: 2026-05-01SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
Filing Date
2025-05-13
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

In the existing technology, problems such as cutting through, cutting too thin, and cutting at an angle are prone to occur during the cutting process of compressor packaging plates. Moreover, the inspection is time-consuming and prone to mis-inspection and missed inspection, making it difficult to meet the cutting size requirements of different compressor models.

Method used

A packaging board is designed with a first surface and a second surface arranged in parallel along its thickness direction. A stepped portion is provided on the side, and the end face of the stepped portion that is parallel to the surface serves as the cutting surface. By setting the stepped portion and grooves or protrusions on the side of the packaging board, the cutting surface is made parallel to the surface, simplifying the calibration and inspection of cutting dimensions.

Benefits of technology

It ensures flatness during the cutting process, reduces cutting errors, simplifies the inspection process, lowers production costs, and improves the reliability and efficiency of cutting quality.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224184804U_ABST
    Figure CN224184804U_ABST
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Abstract

The utility model provides a packaging plate, and relates to the technical field of packaging. The packaging plate is provided with a first surface and a second surface which are arranged in parallel in the thickness direction of the packaging plate, at least one side face of the packaging plate is provided with a step part, the end face, parallel to the first surface or the second surface, in the step part is a cutting face, and the packaging plate is used for cutting along the cutting face. Cutting size calibration and debugging, batch cutting and visual detection are directly carried out along the cutting face of the packaging plate, the cutting flatness can be well guaranteed, and the cutting sizes of the packaging plates corresponding to different identifications, cutting size calibration and debugging without a measuring tool and quality detection are achieved.
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Description

A type of packaging board Technical Field

[0001] This application relates to the field of packaging technology, and more specifically, to a packaging board. Background Technology

[0002] Foamed materials are very practical packaging materials for compressor packaging, transportation, and warehousing. After the compressor is bundled, the foam can ensure that the compressor does not shift, collapse, or generate violent vibrations under various transportation conditions, thus preventing damage to the compressor's components. At the same time, it can also ensure that the material will not deform during long-term static stacking, thus preventing uneven stress and damage to the compressor's shape.

[0003] The foaming of packaging compressors usually takes the form of a sheet. In actual packaging operations, the sheet needs to be cut into upper and lower fixing plates, and the compressor is fixed between the upper and lower fixing plates. However, due to the different compressor models, there are many structural forms of its base, which means that the lower fixing plate needs to be of various sizes and specifications. This involves checking and calibrating the cutting dimensions of the packaging plate for different compressor models. During the cutting process, situations such as cutting through, cutting too thin, or cutting at an angle often occur. Moreover, when detecting the above-mentioned quality problems in the cutting of the packaging plate, measuring tools are required, which is time-consuming and prone to mis-detection and omission. Summary of the Invention

[0004] The purpose of this application includes, for example, providing a packaging board for calibrating, adjusting, cutting, and visually inspecting the cutting dimensions along the cutting surface, which can better ensure the flatness of the cut and realize the cutting dimensions of the packaging board corresponding to different markings, and the cutting dimension calibration, adjustment, and quality inspection without measuring tools.

[0005] The embodiments of this application can be implemented as follows:

[0006] An embodiment of this application provides a packaging board having a first surface and a second surface arranged parallel to each other along its thickness direction. At least one side of the packaging board is provided with a stepped portion, and the end face of the stepped portion that is parallel to the first surface or the second surface is a cutting surface. The packaging board is used for cutting along the cutting surface.

[0007] Optionally, at least one side of the packaging plate is provided with a groove, the groove having an inner bottom surface and at least one of the stepped portions, the stepped portion having at least one of the cut surfaces.

[0008] Optionally, the groove has two first inner sides disposed opposite to each other and a second inner side connected to the first inner side. The second inner side is disposed at an angle to the first inner side. The second inner side is the cutting surface. The second inner side is parallel to the first surface or the second surface.

[0009] The groove also has a third inner side surface, which is not on the same straight line as the first inner side surface. The third inner side surface is connected to the second inner side surface, and the third inner side surface and the second inner side surface are set at an angle.

[0010] The first inner side, the second inner side, and the third inner side constitute the stepped portion.

[0011] Optionally, the groove has two stepped portions disposed opposite each other, and the two second inner sides are parallel to the first surface or the second surface and are equidistant from each other.

[0012] Optionally, the first inner side is connected between the first surface and the corresponding second inner side, and the inner bottom surface forms a first marking area between the first surface, the first inner side and the second inner side, and a first marking is provided in the first marking area.

[0013] The inner bottom surface forms a second marking area between the second surface, the second inner side surface, and the third inner side surface, and a second marking is provided in the second marking area.

[0014] Optionally, the groove further has a fourth inner side surface connected between the two third inner sides surface, and the second marking area is formed between the fourth inner side surface, the second inner side surface, and the third inner side surface.

[0015] Optionally, at least one side of the packaging plate is provided with a protrusion, the protrusion having an end face and at least one of the stepped portions, wherein the end face of the stepped portion parallel to the first surface or the second surface is the cutting surface.

[0016] Optionally, the vertical distance between the cutting surface and the first surface is less than the distance between the cutting surface and the second surface, and the vertical distance between the cutting surface and the first surface is 35-85 mm.

[0017] Optionally, the packaging board is made of foam material.

[0018] Optionally, the packaging plate is used to package the compressor.

[0019] The beneficial effects of the packaging board provided in this application embodiment include, for example: the packaging board has a first surface and a second surface arranged in parallel along its own thickness direction, at least one side of the packaging board is provided with a stepped portion, and the end face of the stepped portion that is parallel to the first surface or the second surface is a cutting surface, and the packaging board is used for cutting along the cutting surface.

[0020] By providing a stepped portion on at least one side of the packaging board, the stepped portion having a cutting surface, and the cutting surface being parallel to either the first surface or the second surface, the flatness of the cut can be well guaranteed by simply cutting along the cutting surface during the cutting process of the packaging board, and it is not easy to cause situations such as cutting through, cutting too thin, or cutting at an angle during the cutting process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of the packaging plate in an embodiment of this application;

[0023] Figure 2 is a schematic diagram of the upper fixing plate in an embodiment of this application;

[0024] Figure 3 is a schematic diagram showing the compressor and the lower fixed plate in an assembled state in an embodiment of this application.

[0025] Icons: 100 - Packaging plate; 110 - First surface; 120 - Second surface; 130 - Groove; 131 - Inner bottom surface; 1311 - First marking area; 1312 - Second marking area; 132 - Step; 1321 - First inner side; 1322 - Second inner side; 1323 - Third inner side; 133 - Fourth inner side; 140 - Upper fixing plate; 150 - Lower fixing plate; 200 - Compressor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing this application and simplifying the description, and 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 of this application.

[0030] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0031] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0032] As disclosed in the background section, the foaming of packaging compressors typically occurs in the form of sheet metal. In actual packaging operations, the sheet metal needs to be cut into upper and lower fixing plates, and the compressor is fixed between the upper and lower fixing plates. However, due to the different compressor models, there are many structural forms of the compressor base, resulting in various sizes and specifications for the lower fixing plate. This involves checking and calibrating the cutting dimensions of the sheet metal for different compressor models. During the cutting process, issues such as cutting through, cutting too thin, and cutting at an angle frequently occur. Furthermore, measuring tools are required to detect the aforementioned quality problems in the cutting of the packaging sheet, which is time-consuming and prone to misdetection and omission. The embodiments of this application provide a packaging sheet that at least solves the above-mentioned technical problems.

[0033] Please refer to Figures 1-3. The packaging plate 100 provided in the embodiment of this application has a first surface 110 and a second surface 120 arranged in parallel along its own thickness direction. At least one side of the packaging plate 100 is provided with a step portion 132. The end face of the step portion 132 that is parallel to the first surface 110 or the second surface 120 is a cutting surface. The packaging plate 100 is used to cut along the cutting surface.

[0034] It should be noted that after the packaging plate 100 is cut along the cutting surface, it is divided into an upper fixing plate 140 and a lower fixing plate 150. The upper fixing plate 140 is provided with a top receiving cavity, and the lower fixing plate 150 is provided with a bottom receiving cavity. When the packaging plate 100 is used to package the compressor, during the packaging process, the top of the compressor 200 is assembled into the top receiving cavity and the bottom of the compressor 200 is assembled into the bottom receiving cavity, thereby fixing the compressor 200 between the upper and lower fixing plates.

[0035] Since the first surface 110 and the second surface 120 are parallel, and the cutting surface is parallel to the first surface 110 or the second surface 120, the thickness of the upper fixing plate 140 and the lower fixing plate 150 obtained after cutting can maintain the same thickness.

[0036] In the actual cutting process, a step portion 132 is provided on at least one side of the packaging board 100. The end face of the step portion 132 that is parallel to the first surface 110 or the second surface 120 of the packaging board 100 is the cutting surface. Thus, in the actual cutting process, the operator only needs to calibrate the cutting size of the cutting equipment according to the cutting surface provided on at least one side of the packaging board 100, without having to check the cutting size of the packaging board 100 according to the product model.

[0037] During the production of packaging board 100, the step portion 132 can be pre-formed by means of mold forming, laser engraving or mechanical processing. The specific method for forming the step portion 132 can be flexibly selected according to the material of the board and the production process.

[0038] The packaging plate 100 can be either cuboid or cylindrical. When the packaging plate 100 is cuboid, the step portion 132 can be provided on two opposite sides of the packaging plate 100. When the packaging plate 100 is cylindrical, the step portion 132 can be provided at any position on the side of the packaging plate 100.

[0039] In some embodiments, at least one side of the packaging board 100 is provided with a groove 130, the groove 130 having an inner bottom surface 131 and at least one step portion 132, the end face of the step portion 132 parallel to the first surface 110 or the second surface 120 of the packaging board 100 being a cutting surface, and the step portion 132 having at least one cutting surface.

[0040] When the packaging board 100 is rectangular, it has a groove 130 on one side, or it has grooves 130 on two opposite sides, or it has grooves 130 on three sides, or it has grooves 130 on all four sides. When the packaging board 100 is cylindrical, it has at least one groove 130 at any position on its side.

[0041] The groove 130 can be formed on the side of the packaging plate 100 by molding. On the side where the groove 130 is provided, the inner bottom surface 131 of the groove 130 is parallel to the side. All the inner sides of the groove 130 are perpendicular to the inner bottom surface 131 of the groove 130. The inner side of the stepped portion 132 of the groove 130 that is parallel to the first surface 110 or the second surface 120 is a cut surface.

[0042] In other embodiments, the angle between the inner side surface of the groove 130 other than the cutting surface and the inner bottom surface 131 of the groove 130 may be greater than or less than 90 degrees, that is, the inner side surface of the groove 130 other than the cutting surface may be inclined relative to the inner bottom surface 131 of the groove 130.

[0043] In some embodiments, the groove 130 has a first inner side surface 1321 and a second inner side surface 1322 connected to the first inner side surface 1321. The second inner side surface 1322 is set at an angle to the first inner side surface 1321. The second inner side surface 1322 is a cut surface and is parallel to the first surface 110 or the second surface 120. The groove 130 also has a third inner side surface 1323. The third inner side surface 1323 is not on the same straight line as the first inner side surface 1321. The third inner side surface 1323 is connected to the second inner side surface 1322 and is set at an angle to the second inner side surface 1322. The first inner side surface 1321, the second inner side surface 1322 and the third inner side surface 1323 constitute a stepped portion 132.

[0044] In an optional embodiment, the groove 130 has two opposing stepped portions 132. In the thickness direction of the packaging plate 100, two second inner side surfaces 1322 are parallel to the first surface 110 or the second surface 120 and are equidistant from each other. That is, the two second inner side surfaces 1322 are parallel to the first surface 110 or the second surface 120, the vertical distance from one second inner side surface 1322 to the first surface 110 is equal to the vertical distance from the other second inner side surface 1322 to the first surface 110, and the vertical distance from one second inner side surface 1322 to the second surface 120 is equal to the vertical distance from the other second inner side surface 1322 to the second surface 120.

[0045] In this embodiment, the angle between the second inner side 1322 and the first inner side 1321 is 90°. In other embodiments, the angle between the second inner side 1322 and the first inner side 1321 may be greater than or less than 90°.

[0046] Furthermore, the first inner side 1321 is connected between the first surface 110 and the corresponding second inner side 1322, and the inner bottom surface 131 forms a first marking area 1311 between the first surface 110, the first inner side 1321 and the second inner side 1322, and a first marking is provided in the first marking area 1311.

[0047] The first marking area 1311 is formed between the plane where the first surface 110 is located, the plane where the two second inner sides 1322 are located, and the plane where the two first inner sides 1321 are located respectively. The first marking can be provided on the inner bottom surface 131 of the groove 130 by means of protrusion, recess, printing, label, etc. The first marking can be selected as the marking corresponding to the lower fixing plate 150, such as the code of the lower fixing plate 150.

[0048] By providing a first identifier in the first identifier area 1311, where the first identifier is the code for the lower fixed plate 150, the operator can quickly identify the lower fixed plate 150 among the two fixed plates after cutting, and can quickly use it for the bottom packaging of the compressor 200 of the corresponding compressor model.

[0049] In an optional embodiment, the groove 130 further has two opposing third inner side surfaces 1323, which are respectively connected to two second inner side surfaces 1322, and the third inner side surfaces 1323 and the second inner side surfaces 1322 are arranged at an angle; a second marking area 1312 is formed between the second surface 120, the second inner side surfaces 1322 and the third inner side surfaces 1323, and the inner bottom surface 131 is provided with a second marking in the second marking area 1312.

[0050] In this embodiment, the angle between the third inner surface 1323 and the second inner surface 1322 is 90°, and the distance between the two third inner surfaces 1323 is less than the distance between the two first inner surfaces 1321. In other embodiments, the angle between the third inner surface 1323 and the second inner surface 1322 may be greater than or less than 90°, and the distance between the two third inner surfaces 1323 may be greater than or less than the distance between the two first inner surfaces 1321.

[0051] The second marking area 1312 is formed between the plane where the second surface 120 is located, the plane where the two second inner sides 1322 are located, and the plane where the two third inner sides 1323 are located respectively. The second marking can be provided on the inner bottom surface 131 of the groove 130 by means of protrusion, recess, printing, label, etc. The second marking can be selected as the marking corresponding to the upper fixing plate 140, such as the code of the upper fixing plate 140.

[0052] By providing a second identifier in the second identifier area 1312, where the second identifier is the code for the upper fixed plate 140, the operator can quickly identify the upper fixed plate 140 among the two fixed plates after cutting, and can quickly use it for the top packaging of the compressor 200 of the corresponding compressor model.

[0053] In an optional embodiment, the groove 130 may also have a fourth inner side surface 133, which is connected between two third inner side surfaces 1323, and a second marking area 1312 is formed between the fourth inner side surface 133, the second inner side surface 1322 and the third inner side surface 1323.

[0054] The fourth inner surface 133 may be perpendicular to the inner bottom surface 131 of the groove 130. The angle between the fourth inner surface 133 and the inner bottom surface 131 of the groove 130 may be greater than or less than 90°. The second marking area 1312 is formed between the plane where the fourth inner surface 133 is located, the plane where the two second inner surfaces 1322 are located, and the planes where the two third inner surfaces 1323 are located respectively.

[0055] In some other embodiments, at least one side of the packaging plate 100 is provided with a protrusion, the protrusion having an end face and at least one step portion 132, wherein the end face of the step portion 132 parallel to the first surface or the second surface of the packaging plate is a cut surface.

[0056] When the packaging board 100 is rectangular, it has a protrusion on one side, or on two opposite sides, or on three sides, or on all four sides. When the packaging board 100 is cylindrical, it has at least one protrusion at any position on its side.

[0057] On the side with the protrusion, the end face of the protrusion is parallel to the side, and all the outer sides of the protrusion are perpendicular to the end face of the protrusion. The outer side of the stepped portion 132 of the protrusion that is parallel to the first surface 110 or the second surface 120 is a cut surface.

[0058] In other embodiments, the angle between the outer surface of the protrusion other than the cutting surface and the end face of the protrusion may be greater than or less than 90 degrees, that is, the outer surface of the protrusion other than the cutting surface may be inclined relative to the end face of the protrusion.

[0059] In this embodiment, the vertical distance between the cutting surface and the first surface 110 is less than the vertical distance between the cutting surface and the second surface 120, and the vertical distance between the cutting surface and the first surface 110 is 35-85mm.

[0060] It should be noted that, depending on the packaging requirements, the thickness of the lower fixing plate 150, which is formed after cutting the packaging plate 100, can be less than the thickness of the upper fixing plate 140. The thickness of the lower fixing plate 150 is the distance between the cut surface and the first surface 110, and the thickness of the upper fixing plate 140 is the distance between the cut surface and the second surface 120.

[0061] Since the lower fixed plate 150 needs to support the compressor 200, it is necessary to ensure that the thickness of the lower fixed plate 150 is not too thin or that there are uneven cuts or areas that are too thin. That is, the distance between the cut surface and the first surface 110 should not be too small, and the horizontal flatness of the cut surface should be maintained. If the thickness of the lower fixed plate 150 is too thin or the cut thickness is uneven, the strength of the lower fixed plate 150 will decrease, and the lower fixed plate 150 will be easily crushed when supporting the compressor 200. In addition, the lower fixed plate 150 is also easily damaged when the robot arm grasps it.

[0062] For example, the distance between the cut surface and the first surface 110 is 35mm, 45mm, 55mm, 65mm, 75mm or 85mm. It can be understood that the distance between the cut surface and the first surface 110 depends on the product packaging requirements of different compressor models, as long as the lower fixing plate 150 after cutting has good load-bearing capacity.

[0063] Of course, it is understandable that the thickness of the upper fixing plate 140 should not be too thin or there should be uneven cutting of the upper fixing plate 140 with localized thinness. Otherwise, the strength of the upper fixing plate 140 will decrease and it will be easy to break.

[0064] In this embodiment, the packaging board 100 is made of foamed material. For example, the foamed material is EPS, EPE, or EPP.

[0065] It should be noted that EPS material is a lightweight closed-cell foam material made of polystyrene beads and foaming agent, EPE material is a material formed by physical foaming of low-density polyethylene resin, and EPP material is a high-density foam material.

[0066] Taking EPS material as an example, when cutting packaging board 100, hot wire cutting is usually used. When using hot wire cutting, heated metal wire is generally used to cut EPS material, thereby forming a clean and smooth cut. This method can better ensure the flatness of the cut.

[0067] The technical effects of the packaging board 100 provided in this application embodiment include at least the following:

[0068] By providing a stepped portion 132 on at least one side of the packaging plate 100, and having an end face of the stepped portion 132 parallel to the first surface 110 or the second surface 120 of the packaging plate 100 as a cutting surface, the operator can calibrate the cutting size of the cutting equipment based on the cutting surface provided on at least one side of the packaging plate 100 during the actual cutting process, without having to check the cutting size of the packaging plate 100 according to the product model.

[0069] Operators visually inspect the upper fixing plate 140 and lower fixing plate 150 formed by trial production, calibration, and cutting of packaging plate 100. If the cutting surface exists or partially exists, the cutting dimension accuracy is calibrated; otherwise, batch cutting begins.

[0070] During batch cutting, operators only need to cut along the cutting surface to ensure the flatness of the cut. It is less likely to cause issues such as cutting through, cutting too thin, or cutting at an angle during the cutting process. This reduces the need for subsequent trimming processes, lowers production costs, and ensures that the thickness of the lower fixing plate 150 and / or the upper fixing plate 140 is not cut too thin or unevenly thin in some areas. This avoids damage caused by a decrease in the strength of the lower fixing plate 150 and / or the upper fixing plate 140.

[0071] During the calibration and testing of the cutting dimensions of the packaging board 100 and the inspection of the cutting quality, the quality inspectors do not need to use measuring tools when checking the flatness of the cutting of the packaging board 100. They can visually check whether the cut surface has disappeared to check whether the upper fixed plate 140 and the lower fixed plate 150 are qualified, which greatly reduces the complexity and time of the inspection.

[0072] By providing a first identifier in the first identifier area 1311, where the first identifier is the code for the lower fixed plate 150, the operator can quickly identify the lower fixed plate 150 among the two fixed plates after cutting, and it can be quickly used for the bottom packaging of the compressor 200 of the corresponding compressor model; by providing a second identifier in the second identifier area 1312, where the second identifier is the code for the upper fixed plate 140, the operator can quickly identify the upper fixed plate 140 among the two fixed plates after cutting, and it can be quickly used for the top packaging of the compressor 200 of the corresponding compressor model.

[0073] In summary, the packaging board 100 provided in this application has a first surface 110 and a second surface 120 arranged in parallel along its thickness direction. At least one side of the packaging board 100 is provided with a stepped portion 132. The end face of the stepped portion 132 that is parallel to the first surface 110 or the second surface 120 of the packaging board 100 is a cutting surface. The packaging board 100 is used for cutting along the cutting surface, realizing that there is no need to check the cutting size of the packaging board 100 according to the product model. The cutting size can be directly calibrated and adjusted, batch cutting and visual inspection can be performed along the cutting surface of the packaging board 100. It can better ensure the flatness of the cutting and realize the cutting size of the packaging board 100 corresponding to different markings, and the cutting size calibration and quality inspection without measuring tools.

[0074] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A packaging board, characterized in that, The packaging board (100) has a first surface (110) and a second surface (120) arranged in parallel along its own thickness direction. At least one side of the packaging board (100) is provided with a step portion (132). The end face of the step portion (132) that is parallel to the first surface (110) or the second surface (120) is a cutting surface. The packaging board (100) is used to cut along the cutting surface.

2. The packaging board according to claim 1, characterized in that, The packaging board (100) has a groove (130) on at least one side, the groove (130) having an inner bottom surface (131) and at least one step portion (132), the step portion (132) having at least one cut surface.

3. The packaging board according to claim 2, characterized in that, The groove (130) has a first inner side surface (1321) and a second inner side surface (1322) connected to the first inner side surface (1321). The second inner side surface (1322) is set at an angle to the first inner side surface (1321). The second inner side surface (1322) is the cut surface. The second inner side surface (1322) is parallel to the first surface (110) or the second surface (120). The groove (130) also has a third inner side surface (1323). The third inner side surface (1323) is connected to the second inner side surface (1322). The third inner side surface (1323) is set at an angle to the second inner side surface (1322). The first inner side surface (1321), the second inner side surface (1322), and the third inner side surface (1323) constitute the stepped portion (132).

4. The packaging board according to claim 3, characterized in that, The groove (130) has two stepped portions (132) arranged opposite to each other, and the two second inner side surfaces (1322) are parallel to the first surface (110) or the second surface (120) and are equidistant from each other.

5. The packaging board according to claim 3, characterized in that, The first inner side surface (1321) is connected between the first surface (110) and the corresponding second inner side surface (1322). The inner bottom surface (131) forms a first marking area (1311) between the first surface (110), the first inner side surface (1321) and the second inner side surface (1322), and a first marking is provided in the first marking area (1311). The inner bottom surface (131) forms a second marking area (1312) between the second surface (120), the second inner side surface (1322) and the third inner side surface (1323), and a second marking is provided in the second marking area (1312).

6. The packaging board according to claim 5, characterized in that, The groove (130) also has a fourth inner side (133) connected between the two third inner sides (1323), and the second marking area (1312) is formed between the fourth inner side (133), the second inner side (1322) and the third inner side (1323).

7. The packaging board according to claim 1, characterized in that, The packaging board (100) has a protrusion on at least one side, the protrusion having an end face and at least one step (132), the end face of the step (132) that is parallel to the first surface (110) or the second surface (120) being the cutting surface.

8. The packaging board according to claim 1, characterized in that, The vertical distance between the cutting surface and the first surface (110) is less than the vertical distance between the cutting surface and the second surface (120), and the vertical distance between the cutting surface and the first surface (110) is 35-85 mm.

9. The packaging board according to claim 1, characterized in that, The packaging board (100) is made of foam material.

10. The packaging board according to claim 1, characterized in that, The packaging plate (100) is used to package the compressor.