A sponge abrasive block with high wear resistance
By using a sponge abrasive block with a flexible cloth hinge and a continuous convex surface design, the applicability and lifespan issues of existing sponge abrasive blocks when grinding small-sized grooves and small workpiece surfaces are solved, achieving efficient multi-size adaptation and wear resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HONGCHENG ABRASIVE MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2025-08-10
- Publication Date
- 2026-07-31
AI Technical Summary
Existing sponge abrasive blocks are difficult to insert effectively when grinding small grooves or slots, and the abrasive layer suffers severe local wear when grinding small workpiece surfaces, resulting in a shortened overall service life.
The structure employs a double sponge block design, with flexible fabric hinges and a continuous convex surface to achieve adjustable sponge blocks and multi-level width adaptation. Combined with a composite adhesive of aluminum silicate fiber and glass fiber, it improves bonding strength and heat resistance, and enhances stability.
It improves the applicability and service life of sponge abrasive blocks, effectively polishing large flat and circumferential surfaces while avoiding unnecessary wear on the abrasive layer and extending the service life.
Smart Images
Figure CN224575433U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sponge abrasive blocks, specifically a sponge abrasive block with high wear resistance. Background Technology
[0002] Sponge abrasive blocks, also known as sponge grinding blocks, are abrasive sand applied to a sponge. They are a type of polishing consumable and are mostly rectangular or cubic in shape.
[0003] An existing patent (publication number: CN220446224U) discloses a sponge abrasive block with high wear resistance, including a limiting frame. The inner cavity of the limiting frame is bonded to the sponge abrasive block body, and a handle is fixedly connected to the top of the limiting frame. The sponge abrasive block body includes a sponge base layer, a reinforcing layer on the outer surface of the sponge base layer, an adhesive layer on the side of the reinforcing layer away from the sponge base layer, and an abrasive layer on the side of the adhesive layer away from the reinforcing layer. This utility model, by setting the limiting frame and the handle, facilitates the movement of the sponge abrasive block body for grinding and polishing. By setting the sponge base layer, reinforcing layer, adhesive layer, abrasive layer, and through holes, the sponge abrasive block body can be constructed together. At the same time, the abrasive layer and through holes facilitate the entry of the debris generated by the sponge abrasive block body during grinding into the through holes. By setting the above structure, the sponge abrasive block body has the advantage of improved wear resistance during use, thereby improving the wear resistance and service life of the sponge abrasive block body.
[0004] When grinding narrow grooves or slots, even when compressed, the aforementioned abrasive blocks are difficult to effectively fit into and conform to the processing area, and the contact area cannot be effectively controlled. Secondly, during the grinding of small workpieces, some areas of the abrasive layer are prone to accelerated wear due to concentrated force, while other areas remain underutilized. When a local abrasive layer wears to failure, the remaining abrasive layer is prone to creating blind spots when grinding larger workpieces, resulting in a shortened overall service life. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides a sponge abrasive block with high wear resistance, which has advantages such as easy grinding of grooves and reasonable utilization of abrasive layers according to workpiece size, thus solving the problems mentioned in the background technology.
[0006] To achieve the above objectives, this application provides the following technical solution: a sponge abrasive block with high wear resistance, comprising two sponge blocks, each sponge block having a fixing groove on one side, the same flexible cloth being arranged inside the two fixing grooves, the flexible cloth being C-shaped to form a flexible hinge between the two sponge blocks, and abrasive discs being bonded to the outer surfaces of both sponge blocks.
[0007] The sides of the two sponge blocks that are close to each other are both designed as planes;
[0008] The two sponge blocks each have a continuous convex surface formed by multiple boundary line segments of different lengths on their opposite sides, and each abrasive pad is adapted to the surface of its adjacent sponge block.
[0009] Furthermore, the flexible fabric is bonded to the inner wall of the fixing groove by an adhesive that combines phenolic epoxy resin with aluminum silicate fiber and glass fiber.
[0010] By combining the above scheme with aluminum silicate fiber, which has a low thermal conductivity, and glass fiber, which has strong mechanical properties, the bonding strength and heat resistance can be improved simultaneously. This avoids the failure of the adhesive due to heat transfer caused by grinding and improves the overall stability.
[0011] Furthermore, the flexible fabric has multiple raised strips arranged along its length on both ends of the two fixed grooves.
[0012] Through the above solution, the raised strips enhance the bonding strength between the flexible fabric and the sponge block through mechanical locking, preventing slippage or peeling, thereby improving performance.
[0013] Furthermore, an indentation is provided at the middle bend of the flexible fabric, which guides the flexible fabric to bend correctly.
[0014] The above method allows the two sponge blocks to be opened and brought close together to form a flat surface, which facilitates rapid grinding of larger workpieces.
[0015] Furthermore, the flexible fabric is a polyester fiber fabric.
[0016] The above solution provides good tear resistance and high flexibility, allowing for unrestricted compression and deformation of the sponge block.
[0017] Furthermore, each of the two sponge blocks has a set of through holes extending to the other side on one side.
[0018] The above solution can reduce the accumulation of gas pressure generated by compressing the sponge during sanding, while improving air circulation efficiency and facilitating heat dissipation.
[0019] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0020] This high-wear-resistant sponge abrasive block achieves dual-sponge block adjustment through a C-shaped flexible cloth hinge structure. When unfolded, it forms a large flat surface that can cover the surface of a flat workpiece, enabling large-area grinding and improving grinding efficiency. At the same time, when grinding the surface of round bar materials, it can achieve the purpose of wrapping the circumference of the workpiece, improving its applicability. When folded, it forms multi-level width adaptation through continuous convex surfaces of different widths, which can penetrate into narrow grooves of different widths, solving the problems of traditional abrasive blocks that are too thick to be inserted and too thin to be easily deformed and difficult to apply force.
[0021] By using continuous convex surfaces of different widths, when grinding the flat surfaces of smaller workpieces of different sizes, it is possible to use continuous surfaces of different widths according to the size of the workpiece, avoiding wear of the abrasive pads in other areas, improving the utilization rate of the abrasive layer and the service life of the abrasive blocks. Attached Figure Description
[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ;
[0023] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 2 ;
[0024] Figure 3 This is a sectional view of the overall structure of this application from the front.
[0025] Figure 4 This is a front view of the overall structure of this application;
[0026] Figure 5 The sponge block structure of this application Figure 1 ;
[0027] Figure 6 The sponge block structure of this application Figure 2 ;
[0028] Figure 7 This is a diagram of the flexible fabric structure of this application.
[0029] In the picture:
[0030] 1. Sponge block; 101. Plane; 102. Continuous convex surface;
[0031] 2. Fixing groove;
[0032] 3. Flexible fabric; 301, raised stripe;
[0033] 4. Grinding disc; 5. Indentation; 6. Through hole. Detailed Implementation
[0034] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0035] Please see Figure 1 , Figure 3 and Figure 4This embodiment of a high-wear-resistant sponge abrasive block includes two sponge blocks 1. Each sponge block 1 has a fixing groove 2 on one side. The same flexible cloth 3 is arranged inside the two fixing grooves 2. The flexible cloth 3 is C-shaped to form a flexible hinge between the two sponge blocks 1. Abrasive discs 4 are bonded to the outer surface of each sponge block 1. The flexible cloth 3 is bonded to the inner wall of the fixing groove 2 by an adhesive composed of phenolic epoxy resin, aluminum silicate fiber, and glass fiber. The combination of aluminum silicate fiber, which has a low thermal conductivity, and glass fiber, which has strong mechanical properties, can simultaneously improve the bonding strength and heat resistance, thereby avoiding the failure of the adhesive due to heat transfer generated by abrasion and improving the overall stability.
[0036] Please see Figure 1 , Figure 3 and Figure 7 The flexible cloth 3 has multiple raised strips 301 arranged along its length on both ends of the two fixed grooves 2. The raised strips 301 enhance the bonding strength between the flexible cloth 3 and the sponge block 1 through mechanical locking, preventing slippage or peeling, thereby improving the adhesion. The flexible cloth 3 has an indentation 5 at the middle bend, which guides the flexible cloth 3 to bend correctly. After the two sponge blocks 1 are opened, the sides that bring them close to each other form a plane 101, which facilitates rapid grinding of larger workpieces. The flexible cloth 3 is made of polyester fiber cloth, which has good tear resistance and high flexibility, and can not restrict the compression deformation of the sponge block 1.
[0037] Please see Figure 1 , Figure 2 and Figure 3 The two sponge blocks 1 are both set as planes 101 with their sides close to each other. When the sponge blocks 1 are unfolded, the two sponge blocks 1 can be on the same horizontal plane 101, which increases the contact area with the workpiece, thereby increasing the area of the grinding disc 4 and improving the grinding efficiency. For rod-shaped materials, they can be included between the two sponge blocks 1 for grinding.
[0038] Please see Figure 1 , Figure 5 and Figure 6 The two sponge blocks 1 each have a continuous convex surface 102 formed by multiple boundary line segments of different lengths on their opposite sides. Each grinding disc 4 is adapted to the surface of its adjacent sponge block 1. The different widths of the convex surfaces of the sponge allow users to easily select grinding surfaces for workpieces of different sizes. At the same time, the different widths of the convex surfaces are suitable for workpieces of different widths, making it easy to insert the sponge block 1. One side of each of the two sponge blocks 1 is provided with a set of through holes 6 that extend to the other side. This can reduce the accumulation of gas pressure generated by compressing the sponge during grinding, while improving air circulation efficiency and facilitating heat dissipation.
[0039] The working principle of the above embodiment is as follows: When grinding a large flat workpiece, two sponge blocks 1 are unfolded outward along the C-shaped hinge structure of the flexible cloth 3. The indentation 5 at the middle of the flexible cloth 3 guides the correct bending, ensuring that the sides of the two sponge blocks 1 that are close to each other are on the same horizontal plane 101, forming a larger flat grinding surface 101, improving grinding efficiency. For round bar-shaped workpieces, the sponge block 1 can wrap around its circumference to achieve large-area grinding of the circumference. When grinding slots or grooves with a small width, a continuous convex surface 102 that matches its width is selected to facilitate the insertion of the sponge block 1 while maintaining sufficient contact pressure. When grinding a small flat surface of a workpiece, such as a long thin sheet, it can be ground through a continuous convex surface 102 with a matching width, reducing unnecessary wear of the grinding disc 4 in non-primary grinding areas, making reasonable use of the grinding disc 4 material, and improving the service life of the abrasive block.
[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0041] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-wear-resistant sponge sanding block comprising two sponge blocks (1), characterized in that: A fixing groove (2) is provided on one side of each of the two sponge blocks (1). The same flexible cloth (3) is provided inside the two fixing grooves (2). The flexible cloth (3) is C-shaped so that a flexible hinge is formed between the two sponge blocks (1). A polishing disc (4) is bonded to the outer surface of each of the two sponge blocks (1). The surfaces of the two sponge blocks (1) that are close to each other are both set as planes (101); The two sponge blocks (1) have a continuous convex surface (102) formed by multiple boundary line segments of different lengths on their opposite sides, and each polishing pad (4) is adapted to the surface of its adjacent sponge block (1).
2. The high wear resistant sponge sanding block of claim 1, wherein: The flexible fabric (3) is bonded to the inner wall of the fixing groove (2) by an adhesive composed of phenolic epoxy resin, aluminum silicate fiber, and glass fiber.
3. The high wear resistant sponge sanding block of claim 2, wherein: The flexible fabric (3) has multiple raised strips (301) arranged along its length on both ends of the two fixed grooves (2).
4. The high wear resistant sponge sanding block of claim 3, wherein: The flexible fabric (3) has an indentation (5) at the middle bend.
5. The high wear resistant sponge sanding block of claim 3, wherein: The flexible fabric (3) is a polyester fiber fabric.
6. The high wear resistant sponge sanding block of claim 1, wherein: Each of the two sponge blocks (1) has a set of through holes (6) extending to the other side.