Concave-convex softwood cat scratching plate and manufacturing method thereof

By using a convex-concave mold to form a tightly integrated convex-concave wave-shaped support structure in the cat scratching board, the gap problem caused by the density difference between cork and corrugated paper is solved, improving the service life and comfort of the cat scratching board.

CN121003154APending Publication Date: 2025-11-25SHAANXI KORBENA CORK CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202511187545.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2025-11-25

AI Technical Summary

Technical Problem

Existing cork cat scratching boards have a shortened lifespan due to the density difference between cork and corrugated paper and the possible gaps.

Method used

The corrugated composite layer is pressed into concave shape using a concave-convex mold, while the cork layer is raised, forming a tightly integrated concave-convex wave-shaped support structure. The multi-layer corrugated composite sheet and cork layer are bonded together with polyurethane adhesive to increase density and compactness.

Benefits of technology

It significantly improves the lifespan of the cat scratching board, enhances its aesthetics and scratching angle, provides a better feel and stability, and prevents loosening and damage at the seams.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121003154A_ABST
    Figure CN121003154A_ABST
Patent Text Reader

Abstract

The invention belongs to the technical field of pet appliances, and particularly relates to a concave-convex softwood cat scratching plate which comprises a softwood scratching plate body, the softwood scratching plate body comprises a plurality of combination layers which are sequentially bonded into a whole from bottom to top, and the combination layers comprise corrugated combination layers and softwood layers which are alternately bonded into a whole from bottom to top. The corrugated combined layer can be replaced by a soft layer, the soft layer is formed by fully mixing three kinds of cork particles with different mesh numbers with polyurethane glue in proportion, and then sequentially carrying out steel mold pressing, constant-temperature curing forming and sheet polishing, and the cork particles comprise 25% of 8-mesh cork particles, 35% of 12-mesh cork particles and 40% of 30-mesh cork particles. The addition amount of the polyurethane glue is 12-15% of the total weight of the cork particles. The corrugated combined layer or the soft layer is pressed to be concave through the concave-convex mold, so that the cork layer protrudes, and a tightly-combined concave-convex wavy supporting structure is formed.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pet appliances, and particularly relates to a concave-convex cork cat scratching board and a manufacturing method thereof. BACKGROUND

[0002] The cat scratching board is a pet appliance that helps cats to grind their claws, satisfies their scratching nature, and reduces the damage to household items. The existing cork cat scratching board, such as the one disclosed in the Chinese Utility Model Patent with the authorization announcement number CN220694107U, combines cork with kraft paper and corrugated paper in a clever way, which not only enhances durability, but also effectively protects the cat's claws.

[0003] However, due to the combination of cork and corrugated paper, there is a difference in density between the cork and the corrugated paper, and there may be gaps, which to some extent shortens the service life of the existing cork cat scratching board.

[0004] In order to reduce the gap between the cork and the corrugated paper and make the cork cat scratching board more durable and scratch-resistant, it is necessary to further optimize the cork cat scratching board. SUMMARY

[0005] In order to make up for the shortcomings of the prior art and solve the problems described in the background, the present application proposes a concave-convex cork cat scratching board and a manufacturing method thereof.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a concave-convex cork cat scratching board, comprising a cork scratching board, the cork scratching board comprising a plurality of combination layers sequentially bonded in one body along a direction from bottom to top, the plurality of combination layers comprising corrugated combination layers and cork layers alternately bonded in one body along the direction from bottom to top, the corrugated combination layers comprising first corrugated combination sheets and second corrugated combination sheets sequentially bonded in one body along the direction from bottom to top, the first corrugated combination sheets and the second corrugated combination sheets each comprising first pad paper, large wave corrugated paper, second pad paper and small wave corrugated paper sequentially bonded in one body along the direction from bottom to top; the cork scratching board is subjected to a slicing treatment along a direction perpendicular to the surface of the cork scratching board, and a cork scratching board segment with a certain thickness is obtained after the slicing treatment, the cross section of which is bonded in one body with the plate layer; each cork scratching board bonded in one body with the plate layer is pressed by a concave-convex mold, the corrugated combination layers are pressed concave, and the cork layers are pressed convex, forming a concave-convex wave-shaped support structure.

[0007] Preferably, the plate layer comprises one of kraft paper, cloth, wood, paperboard, metal plate or plastic plate layer.

[0008] Preferably, the first corrugated assembly sheet and the second corrugated assembly sheet are bonded together with polyurethane adhesive at a bonding temperature of 50-60℃ and a bonding pressure of 0.5-1MPa; the first corrugated assembly sheet and the second corrugated assembly sheet are bonded together with corrugated paper of the first corrugated assembly sheet and first padding paper of the second corrugated assembly sheet; the corrugated assembly layer and the cork layer are bonded together with corrugated paper of the second corrugated assembly sheet and the cork layer.

[0009] Preferably, the large-wave corrugated paper is composed of corrugated paper with a large-wave cross-section, and the small-wave corrugated paper is composed of corrugated paper with a small-wave cross-section. The size of the large-wave shape of the cross-section of the large-wave corrugated paper is larger than the size of the small-wave shape of the cross-section of the small-wave corrugated paper. The height of the large-wave shape of the cross-section of the large-wave corrugated paper is 3-6mm, and the height of the small-wave shape of the cross-section of the small-wave corrugated paper is 1-3mm.

[0010] Preferably, the cork layer is formed by thoroughly mixing three different mesh sizes of cork particles with polyurethane adhesive in a certain proportion, followed by sequential pressing with a steel mold, constant temperature curing, and sheet polishing. The cork particles comprise 25% 8-mesh cork particles, 35% 12-mesh cork particles, and 40% 30-mesh cork particles. The amount of polyurethane adhesive added is 12%-15% of the total weight of the cork particles. The density of the cork layer after pressing with a steel mold is 230-240 kg / m³. 3 The thickness of each cork layer after polishing is 4-12mm.

[0011] Preferably, the bonding contact surface dimensions of the corrugated composite layer and the cork layer are the same, and the cross-section of the cork scraper with a certain thickness is the same as the bonding contact surface dimensions of the board layer to which it is bonded.

[0012] Preferably, the corrugated composite layer can be replaced with a flexible layer. The flexible layer is made by thoroughly mixing three different mesh sizes of cork particles with polyurethane adhesive in a certain proportion, and then pressing, curing at a constant temperature, and polishing the mixture into sheets using a steel mold. The cork particles include 25% 8-mesh cork particles, 35% 12-mesh cork particles, and 40% 30-mesh cork particles. The amount of polyurethane adhesive added is 12%-15% of the total weight of the cork particles. The density of the flexible layer after pressing with a steel mold is 180-200 kg / m³. 3 The thickness of each soft layer after polishing is 4-12mm. Compared with the cork layer 1012, the soft layer 102 has a lower density after pressing to achieve better compressibility.

[0013] A method for manufacturing a textured cork cat scratching board, characterized in that,

[0014] S1. Construct the corrugated composite layer;

[0015] S2. Making the cork layer: In the process of making the cork layer, first weigh three kinds of cork particles with different mesh sizes and mix them in a ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue by weight of the total weight of the cork particles to the mixed cork particles and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles.

[0016] Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 230-240 kg / m³. 3 To meet the density requirements of the cork layer, the pressed cork layer is placed in a constant temperature curing equipment, and the curing temperature is set to 80-100℃ and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured cork layer is then polished to obtain a cork layer with a thickness of 4-12mm per sheet.

[0017] S3. Making cork gripper: The top surface of the corrugated composite layer made in S1 is glued to the cork layer made in S2 to form a composite layer. The composite layers are then overlapped and glued to form the cork gripper.

[0018] S4. Polishing treatment: Polish the cork sling made in S3 along a direction perpendicular to the surface of the cork sling, with a polishing thickness of 4-10mm.

[0019] S5. Surface treatment: After polishing, each cork squeegee is bonded to the board layer, which includes one of the following: kraft paper, fabric, wood, cardboard, metal plate or plastic plate.

[0020] S6. Concave-convex molding: The cork scratching board bonded to the board layer is pressed using a concave-convex mold. The corrugated composite layer is pressed inward, and the cork layer is raised, forming a wavy support structure. After drying, the concave-convex cork cat scratching board is obtained. The density of the cork layer after molding is 260-280 kg / m³. 3 The molding temperature is 50-80℃, the molding pressure is 15-30MPa, and the molding time is 3-10 minutes.

[0021] Preferably, the specific steps for fabricating the corrugated composite layer in step S1 are as follows:

[0022] S11: Adhere large corrugated paper to the top surface of the first pad paper, then adhere the second pad paper to the top surface of the large corrugated paper in sequence, and then adhere small corrugated paper to the top surface of the second pad paper in sequence. The first pad paper, large corrugated paper, second pad paper and small corrugated paper are adhered in sequence from bottom to top to form the first corrugated assembly sheet. The bonding temperature is 50-60℃, the bonding pressure is 0.5-1MPa and the bonding time is 5-10 minutes.

[0023] S12: Construct the second corrugated assembly sheet using the same method as S11;

[0024] S13: The first corrugated composite sheet and the second corrugated composite sheet are stacked and bonded together to form a corrugated composite layer;

[0025] In step S6, one side of the cork cat scratching board obtained is bonded to a straight board, cylinder, corrugated board, or irregularly shaped board using polyurethane adhesive. The bonding temperature is 50-60℃, the bonding pressure is 0.5-1MPa, and the bonding time is 5-10 minutes.

[0026] Preferably, the corrugated composite layer can be replaced with a flexible layer, and the specific manufacturing method is as follows:

[0027] S1. Making the soft layer: In the process of making the soft layer, first weigh three kinds of cork particles with different mesh sizes and mix them in a ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue to the mixed cork particles and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles.

[0028] Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 180-200 kg / m³. 3 To meet the density requirements of the soft layer, the pressed soft layer is placed in a constant temperature curing equipment, and the curing temperature is set to 80-100℃ and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured soft layer is then polished to obtain a soft layer with a thickness of 4-12mm per sheet.

[0029] S2. Making the cork layer: In the process of making the cork layer, first weigh three kinds of cork particles with different mesh sizes and mix them in a ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue by weight of the total weight of the cork particles to the mixed cork particles and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles.

[0030] Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 230-240 kg / m³. 3 To meet the density requirements of the cork layer, the pressed cork layer is placed in a constant temperature curing equipment, and the curing temperature is set to 80-100℃ and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured cork layer is then polished to obtain a cork layer with a thickness of 4-12mm per sheet.

[0031] S3. Making a cork gripper: The top surface of the soft layer made in S1 is bonded to the cork layer made in S2 to form a composite layer. The composite layers are then overlapped and bonded to form a cork gripper.

[0032] S4. Polishing treatment: Polish the cork sling made in S3 along a direction perpendicular to the surface of the cork sling, with a polishing thickness of 4-10mm.

[0033] S5. Surface treatment: After polishing, each cork squeegee is bonded to the board layer, which includes one of the following: kraft paper, fabric, wood, cardboard, metal plate or plastic plate.

[0034] S6. Concave-convex molding: The cork scratching board, which is bonded to the board layer, is pressed into the soft layer using a concave-convex mold. The soft layer is pressed inward, and the cork layer is raised, forming a wavy support structure. After drying, the concave-convex cork cat scratching board is obtained. The density of the soft layer after molding is 230-250 kg / m³. 3 The density of the molded cork layer is 260-280 kg / m³. 3 The molding temperature is 50-80℃, the molding pressure is 15-30MPa, and the molding time is 3-10 minutes.

[0035] The technical effects and advantages of this invention are as follows:

[0036] (1) This invention uses a concave-convex mold to press the corrugated composite layer into a concave shape, making the cork layer convex, forming a tightly bonded concave-convex wave-shaped support structure. This design avoids the gap problem caused by density differences and thermal expansion and contraction between the cork and the corrugated layer, significantly improving the service life of the cat scratching board.

[0037] (2) The cork cat scratching board obtained by the present invention has a cork wave-shaped support structure, which not only increases the aesthetics of the cat scratching board, but also provides cats with more scratching angles and tactile sensations, further improving the cats' comfort.

[0038] (3) The first corrugated assembly sheet and the second corrugated assembly sheet of the present invention are formed by bonding the first pad paper, the large wave corrugated paper, the second pad paper and the small wave corrugated paper in sequence, so that the corrugated part is appropriately tight during the subsequent step of making the concave and convex cork cat scratching board.

[0039] (4) This invention uses a concave-convex mold to press the soft layer into a concave shape, causing the cork layer to bulge out. The cat scratching board, pressed by the mold, forms a tightly connected, undulating, wave-like support structure. This structure offers significant advantages. Firstly, the original seams are seamless due to the structural change, avoiding potential loosening or cracking. Secondly, the pressing increases the density of the cat scratching board, making the structure more compact. This makes the cat scratching board more durable, less prone to breakage during daily use by cats, and prevents crumbling, providing a more lasting and stable user experience for cats. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of a cork scratching board of an embossed cork cat scratching board according to Embodiment 1 of the present invention;

[0041] Figure 2 This is a schematic diagram of the bonding structure between the cork sizing plate after polishing and the board surface in Embodiment 1 of the present invention;

[0042] Figure 3 This is a schematic diagram of the structure of the first corrugated assembly sheet of a corrugated cat scratching board according to Embodiment 1 of the present invention;

[0043] Figure 4 This is a schematic diagram of the bonding structure of the first corrugated assembly and the second corrugated assembly of a textured cork cat scratching board according to Embodiment 1 of the present invention.

[0044] Figure 5 This is a schematic diagram of the bonding structure of the corrugated composite layer and the corrugated layer of a cork cat scratching board according to Embodiment 1 of the present invention;

[0045] Figure 6 This is a schematic diagram of the bonding structure between the soft layer and the cork layer in an embossed cork cat scratching board according to Embodiment 2 of the present invention.

[0046] Figure 7 This is a diagram showing the state of the cork gripper bonded to the board layer in Embodiment 3 of the present invention after using a concave-convex mold;

[0047] Figure 8 This is a process flow diagram of Embodiment 3 of the present invention;

[0048] Figure 9 This is a process flow diagram of Embodiment 4 of the present invention.

[0049] Legend:

[0050] 1. Cork board; 2. Board layer; 101. Composite layer; 102. Soft layer; 1011. Corrugated composite layer; 1012. Cork layer; 10111. First corrugated composite sheet; 10112. Second corrugated composite sheet; 101211. First backing paper; 101212. Large wavy corrugated paper; 101213. Second backing paper; 101214. Small wavy corrugated paper. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Specific implementation examples are given below.

[0053] Example 1

[0054] like Figures 1-5 As shown, a cork cat scratching board includes a cork scratching board 1. The cork scratching board 1 includes several composite layers 101 bonded together sequentially from bottom to top. The composite layers 101 include corrugated composite layers 1011 and cork layers 1012 alternately bonded together from bottom to top. The corrugated composite layer 1011 includes a first corrugated composite sheet 10111 and a second corrugated composite sheet 10112 bonded together sequentially from bottom to top. Both the first corrugated composite sheet 10111 and the second corrugated composite sheet 10112 include corrugated composite layers 10111 and 10112 bonded together sequentially from bottom to top. The first pad paper 101211, the large corrugated paper 101212, the second pad paper 101213, and the small corrugated paper 101214 are sequentially bonded together in the upper direction. The cork gripper 1 is polished along a direction perpendicular to the surface of the cork gripper 1. The resulting cork gripper 1 segment with a certain thickness is bonded to the board layer 2. Each cork gripper 1 bonded to the board layer 2 is pressed by a concave and convex mold. The corrugated composite layer 1011 is pressed concave, and the cork layer 1012 is pressed convex, forming a concave and convex wave-shaped support structure.

[0055] Preferably, the board layer 2 is made of kraft paper.

[0056] Preferably, the first corrugated assembly sheet 10111 and the second corrugated assembly sheet 10112 are bonded together with polyurethane adhesive at a bonding temperature of 50-60℃ and a bonding pressure of 0.5-1MPa; the first corrugated assembly sheet 10111 and the second corrugated assembly sheet 10112 are bonded together with the small corrugated paper 101214 of the first corrugated assembly sheet 10111 and the first padding paper 101211 of the second corrugated assembly sheet 10112; the corrugated assembly layer 1011 and the cork layer 1012 are bonded together with the small corrugated paper 101214 of the second corrugated assembly sheet 10112 and the cork layer 1012.

[0057] Preferably, the large-wave corrugated paper 101212 is composed of corrugated paper with a large-wave cross-section, and the small-wave corrugated paper 101214 is composed of corrugated paper with a small-wave cross-section. The size of the large-wave shape of the cross-section of the large-wave corrugated paper 101212 is larger than the size of the small-wave shape of the cross-section of the small-wave corrugated paper 101214. The height of the large-wave shape of the cross-section of the large-wave corrugated paper 101212 is 3-6mm, and the height of the small-wave shape of the cross-section of the small-wave corrugated paper 101214 is 1-3mm.

[0058] The structure of large-wave corrugated paper, small-wave corrugated paper, first pad paper, and second pad paper being bonded together is mainly to ensure that the corrugated layers are appropriately tight during the later embossing process, so that they are not too soft after molding with large-wave corrugated paper, nor too hard after molding with small-wave corrugated paper.

[0059] Preferably, the cork layer 1012 is formed by thoroughly mixing three different mesh sizes of cork particles with polyurethane adhesive in a certain proportion, and then sequentially pressing, curing at a constant temperature, and sintering. The cork particles include 25% 8-mesh cork particles, 35% 12-mesh cork particles, and 40% 30-mesh cork particles. The amount of polyurethane adhesive added is 12%-15% of the total weight of the cork particles. The density of the cork layer 1012 after pressing with a steel mold is 230-240 kg / m³. 3 After polishing, the thickness of each cork layer of 1012 is 4-12mm.

[0060] Preferably, the bonding contact surface dimensions of the corrugated composite layer 1011 and the cork layer 1012 are the same, and the cross-section of the cork gripper 1 with a certain thickness is the same as the bonding contact surface dimensions of the board layer 2 to which it is bonded.

[0061] The wafer blasting process uses a wafer blasting machine.

[0062] The cork particles are derived from the bark of the cork oak tree, and are processed through crushing, screening, and drying.

[0063] Example 2

[0064] like Figure 6 As shown, preferably, the corrugated composite layer 1011 can be replaced with a flexible layer 102. The flexible layer 102 is made by thoroughly mixing three different mesh sizes of cork particles with polyurethane adhesive in a certain proportion, and then pressing, curing and polishing them in a steel mold, and finally sizing them. The cork particles include 25% 8-mesh cork particles, 35% 12-mesh cork particles, and 40% 30-mesh cork particles. The amount of polyurethane adhesive added is 12%-15% of the total weight of the cork particles. The density of the flexible layer 102 after pressing with a steel mold is 180-200 kg / m³. 3 The thickness of each flexible layer 102 after polishing is 4-12mm.

[0065] Example 3

[0066] like Figures 7-8 As shown, a method for manufacturing a textured cork cat scratching board is described.

[0067] S1. Fabricate corrugated composite layer 1011;

[0068] S2. Making Cork Layer 1012: In the process of making cork layer 1012, first weigh three kinds of cork particles with different mesh sizes and mix them in a ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue by weight of the total weight of the cork particles to the mixed cork particles and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles.

[0069] Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 230-240 kg / m³. 3 To meet the density requirements of the cork layer 1012, the pressed cork layer 1012 is placed in a constant temperature curing device, and the curing temperature is set to 80-100℃ and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured cork layer 1012 is then polished to obtain cork layer 1012 with a thickness of 4-12mm per sheet.

[0070] S3. Making cork gripper 1: The top surface of the corrugated composite layer 1011 made in S1 is bonded to the cork layer 1012 made in S2 to form a composite layer 101. The composite layers 101 are overlapped and bonded one by one to form the cork gripper 1.

[0071] S4. Polishing treatment: The cork gripper 1 made in S3 is polished along a direction perpendicular to the surface of the cork gripper 1, and the polishing thickness is 4-10mm.

[0072] S5. Surface treatment: After polishing, each cork squeegee 1 is bonded to the board layer 2, and the board layer 2 is made of kraft paper.

[0073] S6. Concave-convex molding: Using a concave-convex mold, the cork scratching board 1 bonded to the board layer 2 is pressed inward, and the cork layer 1012 is raised, forming a wavy support structure. After drying, a concave-convex cork cat scratching board is obtained. The density of the molded cork layer 1012 is 260-280 kg / m³. 3 The molding temperature is 50-80℃, the molding pressure is 15-30MPa, and the molding time is 3-10 minutes.

[0074] A method for manufacturing a corrugated cork cat scratching board, the specific steps for manufacturing the corrugated composite layer 1011 in step S1 are as follows:

[0075] S11: A large corrugated paper 101212 is bonded to the top surface of the first pad paper 101211, a second pad paper 101213 is bonded to the top surface of the large corrugated paper 101212 in sequence, and a small corrugated paper 101214 is bonded to the top surface of the second pad paper 101213 in sequence. The first pad paper 101211, the large corrugated paper 101212, the second pad paper 101213 and the small corrugated paper 101214 bonded in sequence from bottom to top constitute the first corrugated assembly sheet 10111. The bonding temperature is 50-60℃, the bonding pressure is 0.5-1MPa and the bonding time is 5-10 minutes.

[0076] S12: Construct the second corrugated assembly sheet 10112 in the same way as S11;

[0077] S13: The first corrugated composite sheet 10111 and the second corrugated composite sheet 10112 are stacked and bonded together to form a corrugated composite layer 1011;

[0078] In step S6, one side of the cork cat scratching board layer 2 obtained is bonded to a straight board, cylinder, wavy board or irregularly shaped board with polyurethane adhesive. The bonding temperature is 50-60℃, the bonding pressure is 0.5-1MPa, and the bonding time is 5 minutes.

[0079] Using only the first corrugated sheet is too thin, and it cannot be tightly bonded to the cork layers on both sides after molding. By using the first and second corrugated sheets bonded together, the thickness of the combination is reasonably matched with the cork layers. This allows the corrugated combination after embossing to be tightly bonded to the cork layers on both sides, and the tightness is similar to the hardness of the cork layers. This makes the finished cork embossed cat scratching board more durable and beautiful.

[0080] Cork layer thickness: 4-12mm; the cork layer is made of 25% 8-mesh cork particles, 35% 12-mesh cork particles, and 40% 30-mesh cork particles, mixed with 12%-15% polyurethane adhesive, cured and pressed to a density of 230-240 kg / m³. 3 The above process makes the cork layer elastic, and the combination of particles of different sizes with the elastic cork layer is more suitable for cats to sharpen their claws.

[0081] The density of the cork layer after molding is 260-280 kg / m³. 3 During molding, the density and compactness of the corrugated part will not be too soft or too hard; and it will fit tightly to both sides of the cork layer, making the molded cork cat scratching board more durable and more beautiful.

[0082] Under the basic conditions of the manufacturing method of the cork cat scratching board in Example 3, the following are some specific implementation data for manufacturing the cork cat scratching board with corrugated composite layer:

[0083] Implementation Group 1: Corrugated composite layer thickness: 4mm;

[0084] In the cork layer fabrication process, the curing temperature is 80℃; the curing time is 24 hours; and the density of the cork layer is 230 kg / m³. 3 Thickness of each cork layer after polishing: 4mm;

[0085] Polishing thickness: 4mm;

[0086] Convex and convex molding mold: wooden; molding temperature: 50℃; molding pressure: 15MPa; molding time: 3 minutes; thickness of the corrugated composite layer after molding: 2mm; thickness of the corrugated layer after molding: 3mm; density of the corrugated layer after molding: 260kg / m³ 3 .

[0087] Implementation Group 2: Corrugated composite layer thickness: 5mm;

[0088] In the cork layer fabrication process, the curing temperature is 80℃; the curing time is 24 hours; and the density of the cork layer is 230 kg / m³. 3 Thickness of each cork layer after polishing: 5mm;

[0089] Polishing thickness: 5mm;

[0090] Convex and convex molding mold: rigid plastic; molding temperature: 50℃; molding pressure: 15MPa; molding time: 3 minutes; thickness of the corrugated composite layer after molding: 3mm; thickness of the corrugated layer after molding: 4mm; density of the corrugated layer after molding: 260kg / m³ 3 .

[0091] Implementation Group 3: Corrugated composite layer thickness: 6mm;

[0092] In the cork layer fabrication process, the curing temperature is 80℃; the curing time is 24 hours; and the density of the cork layer is 240 kg / m³. 3 Thickness of each cork layer after polishing: 6mm;

[0093] Polishing thickness: 6mm;

[0094] Convex and convex molding: Mold material: metal; Molding temperature: 60℃; Molding pressure: 20MPa; Molding time: 3 minutes; Thickness of corrugated composite layer after molding: 3.5mm; Thickness of cork layer after molding: 4.5mm; Density of cork layer after molding: 260kg / m³ 3 .

[0095] Implementation Group 4: Corrugated composite layer thickness: 7mm;

[0096] In the cork layer fabrication process, the curing temperature is 90℃; the curing time is 25 hours; and the density of the cork layer is 240 kg / m³. 3 Thickness of each cork layer after polishing: 7mm;

[0097] Polishing thickness: 7mm;

[0098] Convex and convex molding mold: PVC; molding temperature: 60℃; molding pressure: 20MPa; molding time: 4 minutes; thickness of corrugated composite layer after molding: 4mm; thickness of corrugated layer after molding: 5mm; density of corrugated layer after molding: 270kg / m³ 3 .

[0099] Implementation Group 5: Corrugated composite layer thickness: 8mm;

[0100] In the cork layer fabrication process, the curing temperature is 100℃; the curing time is 25 hours; and the density of the cork layer is 240 kg / m³. 3 Thickness of each cork layer after polishing: 8mm;

[0101] Polishing thickness: 8mm;

[0102] Convex and convex molding die: metal material; molding temperature: 70℃; molding pressure: 25MPa; molding time: 5 minutes; thickness of corrugated composite layer after molding: 5mm; thickness of corrugated layer after molding: 6mm; density of corrugated layer after molding: 280kg / m³ 3 .

[0103] The Chinese utility model patent with authorization announcement number CN220694107U discloses a cork cat scratching board that combines cork with corrugated paper. However, there is a density difference between the cork and the corrugated paper, and gaps may exist, which shortens the service life of the existing cork cat scratching board.

[0104] This invention uses a concave-convex mold to press the corrugated composite layer inward, causing the cork layer to bulge out, forming a tightly bonded, wavy support structure. This design avoids gaps between the cork and corrugated layers caused by density differences and thermal expansion and contraction, significantly improving the lifespan of the cat scratching board.

[0105] Example 4

[0106] like Figure 9 As shown, preferably, the corrugated composite layer 1011 can be replaced with a flexible layer 102, and the specific manufacturing method is as follows:

[0107] S1. Making the soft layer 102: In the process of making the soft layer 102, first weigh three kinds of cork particles with different mesh sizes, and mix them according to the ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue to the mixed cork particles and stir it thoroughly to make the polyurethane glue evenly coat the surface of the cork particles.

[0108] Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 180-200 kg / m³. 3 To meet the density requirements of the soft layer 102, the pressed soft layer 102 is placed in a constant temperature curing equipment, the curing temperature is set to 80-100℃, and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured soft layer 102 is then subjected to sheet polishing to obtain a soft layer 102 with a thickness of 4-12mm per sheet.

[0109] S2. Making cork layer 1012: In the process of making cork layer 1012, first weigh three kinds of cork particles with different mesh sizes and mix them in a ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue by weight of the total weight of the cork particles to the mixed cork particles and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles.

[0110] Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 230-240 kg / m³. 3To meet the density requirements of cork layer 1012, the pressed cork layer is placed in a constant temperature curing equipment, and the curing temperature is set to 80-100℃ and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured cork layer 1012 is then polished to obtain cork layer 1012 with a thickness of 4-12mm per sheet.

[0111] S3. Making cork gripper 1: The top surface of the soft layer 102 made in S1 is bonded to the cork layer 1012 made in S2 to form a composite layer 101. The composite layer 101 is then layered and bonded to form the cork gripper 1.

[0112] S4. Polishing treatment: The cork gripper 1 made in S3 is polished along a direction perpendicular to the surface of the cork gripper 1, and the polishing thickness is 4-10mm.

[0113] S5. Surface treatment: Each cork squeegee 1 after polishing is bonded to the board layer 2, the board layer 2 including kraft paper;

[0114] S6. Concave-convex molding: Using a concave-convex mold, the cork scratching board 1 bonded to the board layer 2 is pressed into the soft layer 102, causing the cork layer 1012 to bulge out, forming a wavy support structure. After drying, a concave-convex cork cat scratching board is obtained. The density of the molded soft layer 102 is 230-250 kg / m³. 3 The density of the molded cork layer 1012 is 260-280 kg / m³. 3 The molding temperature is 50-80℃, the molding pressure is 15-30MPa, and the molding time is 3-10 minutes.

[0115] In step S6, one side of the cork cat scratching board layer 2 obtained is bonded to a straight board, cylinder, wavy board or irregularly shaped board with polyurethane adhesive. The bonding temperature is 50-60℃, the bonding pressure is 0.5-1MPa, and the bonding time is 5 minutes.

[0116] Under the basic conditions of the manufacturing method of the embossed cork cat scratching board in Example 4, the following are some specific implementation data for manufacturing the embossed cork cat scratching board with cork layer and soft layer:

[0117] Implementation Group 6: In the process of creating the flexible layer, the curing temperature of the flexible layer is 80℃; the curing time is 24 hours; and the density of the flexible layer is 180 kg / m³. 3 Thickness of each flexible layer after polishing: 4mm;

[0118] In the cork layer fabrication process, the curing temperature is 80℃; the curing time is 24 hours; and the density of the cork layer is 230 kg / m³. 3 Thickness of each cork layer after polishing: 4mm;

[0119] Polishing thickness: 4mm;

[0120] Concave-convex molding mold: wood; molding temperature: 50℃; molding pressure: 15MPa; molding time: 3 minutes; thickness of the molded soft layer: 2.5mm; density of the molded soft layer: 230kg / m³ 3 Thickness of the molded cork layer: 3mm; Density of the molded cork layer: 260kg / m³ 3 .

[0121] Implementation Group 7: In the step of making the flexible layer, the curing temperature of the flexible layer is 80℃; the curing time is 24 hours; and the density of the flexible layer is 180 kg / m³. 3 Thickness of each flexible layer after polishing: 5mm;

[0122] In the cork layer fabrication process, the curing temperature is 80℃; the curing time is 24 hours; and the density of the cork layer is 230 kg / m³. 3 Thickness of each cork layer after polishing: 5mm;

[0123] Polishing thickness: 5mm;

[0124] Convex and convex molding mold: rigid plastic; molding temperature: 50℃; molding pressure: 15MPa; molding time: 3 minutes; thickness of the molded flexible layer: 2.5mm; density of the molded flexible layer: 230kg / m³ 3 Thickness of the molded cork layer: 4mm; Density of the molded cork layer: 260kg / m³ 3 .

[0125] Implementation Group 8: In the process of creating the flexible layer, the curing temperature of the flexible layer is 90℃; the curing time is 24 hours; and the density of the flexible layer is 190 kg / m³. 3 Thickness of each flexible layer after polishing: 6mm;

[0126] In the cork layer fabrication process, the curing temperature is 80℃; the curing time is 24 hours; and the density of the cork layer is 230 kg / m³. 3 Thickness of each cork layer after polishing: 6mm;

[0127] Polishing thickness: 6mm;

[0128] Convex and convex molding: Mold material: metal; Molding temperature: 50℃; Molding pressure: 20MPa; Molding time: 3 minutes; Soft layer thickness after molding: 4mm; Soft layer density after molding: 230kg / m³ 3 Thickness of the molded cork layer: 4.5mm; Density of the molded cork layer: 260kg / m³ 3 .

[0129] Implementation Group 9: In the process of creating the flexible layer, the curing temperature of the flexible layer is 90℃; the curing time is 24 hours; and the density of the flexible layer is 190 kg / m³. 3 Thickness of each flexible layer after polishing: 7mm;

[0130] In the cork layer fabrication process, the curing temperature is 90℃; the curing time is 24 hours; and the density of the cork layer is 230 kg / m³. 3 Thickness of each cork layer after polishing: 7mm;

[0131] Polishing thickness: 7mm;

[0132] Convex and convex molding mold: PVC; molding temperature: 60℃; molding pressure: 20MPa; molding time: 4 minutes; thickness of the molded flexible layer: 4.5mm; density of the molded flexible layer: 240kg / m³ 3 Thickness of the molded cork layer: 5.5mm; Density of the molded cork layer: 270kg / m³ 3 .

[0133] Implementation Group 10: In the process of creating the flexible layer, the curing temperature of the flexible layer is 100℃; the curing time is 25 hours; and the density of the flexible layer is 200 kg / m³. 3 Thickness of each flexible layer after polishing: 8mm;

[0134] In the cork layer fabrication process, the curing temperature is 100℃; the curing time is 25 hours; and the density of the cork layer is 240 kg / m³. 3 Thickness of each cork layer after polishing: 8mm;

[0135] Polishing thickness: 8mm;

[0136] Convex and convex molding: Mold material: metal; Molding temperature: 70℃; Molding pressure: 25MPa; Molding time: 5 minutes; Soft layer thickness after molding: 5.5mm; Soft layer density after molding: 250kg / m³ 3 Thickness of the molded cork layer: 6.5mm; Density of the molded cork layer: 280kg / m³ 3 .

[0137] This invention uses a concave-convex mold to press a soft layer into a concave shape, creating a raised cork layer. This process, combined with the pressing of the mold, forms a tightly connected, undulating, wave-like support structure in the cat scratching board. This structure offers significant advantages. Firstly, the original seams are seamless due to the structural change, avoiding potential loosening or cracking. Secondly, the pressing process increases the density of the scratching board, making the structure more compact. This makes the scratching board more durable, less prone to breakage during daily use by cats, and prevents crumbling, providing a longer-lasting and stable user experience for cats.

[0138] A textured cork cat scratching board combining a soft layer and a cork layer. The original density of the cork layer remains unchanged, while a soft layer is added. The soft layer is made of low-density cork, which can be composed of ordinary cork particles, carbonized cork particles, or directly using polished cork bark.

[0139] Materials used for making embossing molds include wood, PVC, silicone, plastic, and metal. Embossing molds are custom-made according to product design requirements. The molding pressure is adjusted based on the mold material; different materials require different pressures to create the embossed shapes. For molds with high hardness, the pressure can be reduced, while those with low hardness can be increased. The pressure value is also adjusted according to the required density after molding. For embossed cork cat scratching boards combining corrugated and cork layers, the required density of the cork layer after molding is 260-280 kg / m³. 3 For textured cork cat scratching boards with a combination of a soft layer and a cork layer, the density of the cork layer after molding must be 230-250 kg / m³. 3 The molding temperature must be heated to 50-80℃. This temperature allows the cork embossed cat scratch board to be formed well and will not bounce back.

[0140] Polyurethane adhesive has good adhesion and flexibility, which can meet the bonding requirements and ensure the stability of the cat scratching board during use.

[0141] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cork cat scratching board, characterized in that it includes a cork scratching board (1), the cork scratching board (1) comprising a plurality of composite layers (101) sequentially bonded together in a bottom-to-top direction, the plurality of composite layers (101) comprising corrugated composite layers (1011) and cork layers (1012) alternately bonded together in a bottom-to-top direction, the corrugated composite layers (10111) comprising a first corrugated composite sheet (10111) and a second corrugated composite sheet (10112) sequentially bonded together in a bottom-to-top direction, the first corrugated composite sheet (10111) and the second corrugated composite sheet (10112) both comprising corrugated composite layers (10111) sequentially bonded together in a bottom-to-top direction, the first corrugated composite sheet (10111) and the second corrugated composite sheet (10112) both comprising corrugated composite layers (10111) sequentially bonded together in a bottom-to-top direction, the corrugated composite sheet (10111) comprising corrugated composite layers (1012) alternately bonded together in a bottom-to-top direction, the corrugated composite sheet (10111) comprising corrugated composite layers (10111) sequentially bonded together in a bottom-to-top direction, the corrugated composite sheet (10111) comprising corrugated composite layers (101 ...1) sequentially bonded together in a bottom-to-top direction, the corrugated composite sheet (10111) comprising cor The first pad paper (101211), the large corrugated paper (101212), the second pad paper (101213), and the small corrugated paper (101214) are bonded together in sequence from top to bottom. The cork gripper (1) is polished along a direction perpendicular to the surface of the cork gripper (1). The resulting cork gripper (1) segment with a certain thickness is bonded to the board layer (2) with its cut surface. Each cork gripper (1) bonded to the board layer (2) is pressed by a concave and convex mold. The corrugated composite layer (1011) is concave and the cork layer (1012) is convex, forming a concave and convex wave-shaped support structure.

2. The cork cat scratching board according to claim 1, characterized in that, The board layer (2) includes one of the following: kraft paper, fabric, wood board, cardboard, metal plate or plastic board layer.

3. The cork cat scratching board according to claim 1, characterized in that, The first corrugated assembly sheet (10111) and the second corrugated assembly sheet (10112) are bonded together with polyurethane adhesive at a bonding temperature of 50-60℃ and a bonding pressure of 0.5-1MPa. The first corrugated assembly sheet (10111) and the second corrugated assembly sheet (10112) are bonded together with the small corrugated paper (101214) of the first corrugated assembly sheet (10111) and the first padding paper (101211) of the second corrugated assembly sheet (10112). The corrugated assembly layer (1011) and the cork layer (1012) are bonded together with the small corrugated paper (101214) and the cork layer (1012) of the second corrugated assembly sheet (10112).

4. The cork cat scratching board according to claim 1, characterized in that, The large-wave corrugated paper (101212) is composed of corrugated paper with a large-wave cross-section, and the small-wave corrugated paper (101214) is composed of corrugated paper with a small-wave cross-section. The size of the large-wave shape of the cross-section of the large-wave corrugated paper (101212) is larger than the size of the small-wave shape of the cross-section of the small-wave corrugated paper (101214). The height of the large-wave shape of the cross-section of the large-wave corrugated paper (101212) is 3-6mm, and the height of the small-wave shape of the cross-section of the small-wave corrugated paper (101214) is 1-3mm.

5. The cork cat scratching board according to claim 1, characterized in that: The cork layer (1012) is made by thoroughly mixing three different mesh sizes of cork particles with polyurethane adhesive in a certain proportion, and then pressing, curing and polishing them in a steel mold, followed by constant temperature curing. The cork particles include 25% 8-mesh cork particles, 35% 12-mesh cork particles, and 40% 30-mesh cork particles. The amount of polyurethane adhesive added is 12%-15% of the total weight of the cork particles. The density of the cork layer (1012) after pressing with a steel mold is 230-240 kg / m³. 3 The thickness of each cork layer (1012) after polishing is 4-12mm.

6. The cork cat scratching board according to claim 1, characterized in that, The corrugated composite layer (1011) and the cork layer (1012) have the same bonding contact surface size, and the cross-section of the cork scraper (1) of a certain thickness has the same bonding contact surface size as the board layer (2) to which it is bonded.

7. The cork cat scratching board according to claim 1, characterized in that, The corrugated composite layer (1011) can be replaced by a flexible layer (102). The flexible layer (102) is made by thoroughly mixing three different mesh sizes of cork particles with polyurethane adhesive in a certain proportion, and then pressing them through a steel mold, curing them at a constant temperature, and then polishing them into sheets. The cork particles include 25% 8-mesh cork particles, 35% 12-mesh cork particles, and 40% 30-mesh cork particles. The amount of polyurethane adhesive added is 12%-15% of the total weight of the cork particles. The density of the flexible layer (102) after being pressed by the steel mold is 180-200 kg / m³. 3 The thickness of each soft layer (102) after polishing is 4-12 mm.

8. The method for manufacturing a textured cork cat scratching board according to claim 1, characterized in that, S1. Fabricate the corrugated composite layer (1011); S2. Making the cork layer (1012): In the process of making the cork layer (1012), first weigh three kinds of cork particles with different mesh sizes and mix them in a ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue to the mixed cork particles and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles. Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 230-240 kg / m³. 3 To meet the density requirements of the cork layer (1012), the pressed cork layer (1012) is placed in a constant temperature curing equipment, the curing temperature is set to 80-100℃, and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured cork layer (1012) is then polished to obtain cork layers (1012) with a thickness of 4-12mm per sheet. S3. Making cork gripper (1): The top surface of the corrugated composite layer (1011) made in S1 is bonded to the cork layer (1012) made in S2 to form a composite layer (101). The composite layers (101) are then bonded together layer by layer to form the cork gripper (1). S4, Polishing treatment: Polish the cork gripper (1) made in S3 along a direction perpendicular to the surface of the cork gripper (1), with a polishing thickness of 4-10mm; S5. Surface treatment: Each cork slab (1) after polishing is bonded to the board layer (2), the board layer (2) including one of kraft paper, fabric, wood board, cardboard, metal plate or plastic board layer; S6. Concave-convex molding: The cork scratching board (1) bonded to the board layer (2) is pressed into the corrugated composite layer (1011) using a concave-convex mold, and the cork layer (1012) is raised, forming a convex-convex wave-like support structure. After drying, the concave-convex cork cat scratching board is obtained. The density of the cork layer (1012) after molding is 260-280 kg / m³. 3 The molding temperature is 50-80℃, the molding pressure is 15-30MPa, and the molding time is 3-10 minutes.

9. A method for manufacturing a textured cork cat scratching board according to claim 8, characterized in that, The specific steps for creating the corrugated composite layer (1011) in step S1 are as follows: S11: A large corrugated paper (101212) is bonded to the top surface of the first pad paper (101211), a second pad paper (101213) is bonded to the top surface of the large corrugated paper (101212), and a small corrugated paper (101214) is bonded to the top surface of the second pad paper (101213). The first pad paper (101211), the large corrugated paper (101212), the second pad paper (101213), and the small corrugated paper (101214) bonded in sequence from bottom to top constitute the first corrugated assembly sheet (10111). The bonding temperature is 50-60℃, the bonding pressure is 0.5-1MPa, and the bonding time is 5-10 minutes. S12: Construct the second corrugated assembly sheet (10112) using the same method as S11; S13: The first corrugated composite sheet (10111) and the second corrugated composite sheet (10112) are stacked and bonded together to form a corrugated composite layer (1011); One side of the cork cat scratching board (2) obtained in step S6 is bonded to a straight board, cylinder, corrugated board or irregularly shaped board with polyurethane glue. The bonding temperature is 50-60℃, the bonding pressure is 0.5-1MPa, and the bonding time is 5-10 minutes.

10. A method for manufacturing a textured cork cat scratching board according to claim 8, characterized in that, The corrugated composite layer (1011) can be replaced with a flexible layer (102), and the specific manufacturing method is as follows: S1. Making the soft layer (102): In the process of making the soft layer (102), first weigh three kinds of cork particles with different mesh sizes, mix them according to the ratio of 25% of 8-mesh cork particles, 35% of 12-mesh cork particles and 40% of 30-mesh cork particles, then add 12%-15% of polyurethane glue to the mixed cork particles, and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles. Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 180-200 kg / m³. 3 The density requirement of the soft layer (102) is to place the pressed soft layer (102) into a constant temperature curing equipment, set the curing temperature to 80-100℃, and the curing time to 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured soft layer (102) is then polished to obtain a soft layer (102) with a thickness of 4-12mm per sheet. S2. Making the cork layer (1012): In the process of making the cork layer (1012), first weigh three kinds of cork particles with different mesh sizes and mix them in a ratio of 25% 8-mesh cork particles, 35% 12-mesh cork particles and 40% 30-mesh cork particles. Then, add 12%-15% of polyurethane glue to the mixed cork particles and stir thoroughly to make the polyurethane glue evenly coat the surface of the cork particles. Cork granules mixed with polyurethane adhesive are transferred into a steel mold and pressed to achieve a density of 230-240 kg / m³. 3 To meet the density requirements of the cork layer (1012), the pressed cork layer (1012) is placed in a constant temperature curing equipment, the curing temperature is set to 80-100℃, and the curing time is 24-25 hours. Under these conditions, the polyurethane adhesive is fully cured. The cured cork layer (1012) is then polished to obtain cork layers (1012) with a thickness of 4-12mm per sheet. S3. Making a cork gripper (1): The top surface of the soft layer (102) made in S1 is bonded to the cork layer (1012) made in S2 to form a composite layer (101). The composite layers (101) are then bonded together layer by layer to form a cork gripper (1). S4, Polishing treatment: Polish the cork gripper (1) made in S3 along a direction perpendicular to the surface of the cork gripper (1), with a polishing thickness of 4-10mm; S5. Surface treatment: Each cork slab (1) after polishing is bonded to the board layer (2), the board layer (2) including one of kraft paper, fabric, wood board, cardboard, metal plate or plastic board layer; S6. Concave-convex molding: The cork scratching board (1) bonded to the board layer (2) is pressed with a concave-convex mold. The soft layer (102) is pressed inward, and the cork layer (1012) is raised, forming a convex-convex wave-like support structure. After drying, the concave-convex cork cat scratching board is obtained. The density of the soft layer (102) after molding is 230-250 kg / m³. 3 The density of the molded cork layer (1012) is 260-280 kg / m³. 3 The molding temperature is 50-80℃, the molding pressure is 15-30MPa, and the molding time is 3-10 minutes.

Citation Information

Patent Citations

  • Wave type pet grabs board

    CN205337194U

  • Cork cat scratching plate

    CN220694107U