Foam grinding device and method for manufacturing the same

Abstract

The invention relates to a foam grinding device (10) for grinding workpieces, comprising a base body (12) made of a foam material (14) and abrasive particles (18) fixed to the base body (12) by means of a bonding agent (16). It is proposed that the foam grinding device (10), in particular the base body (12), has a material reinforcement (22) at least partially on its surface (20). In addition, a method (200) for producing the foam grinding device (10) is proposed.

Description

Technical Field

[0001] The invention relates to a foam grinding device for grinding a workpiece and a method for producing the foam grinding device. Background Art

[0002] Foam grinding elements are known in principle from the prior art. The advantage of these grinding elements is that they adapt their shape during the grinding process to the contour of the object to be ground by elastically deforming the soft base body made of foam. Foam grinding elements are therefore the first choice when the grinding process is to be carried out on uneven objects.

[0003] No. 4,887,396 A discloses a foamed abrasive element which comprises a base body, wherein the base body has a greater foam material thickness at locations subject to increased wear.

[0004] There is a continuing need in the abrasive device industry to further improve the durability of abrasive parts, in particular foam abrasive parts, while reducing environmental impact and manufacturing costs. Summary of the invention

[0005] The invention relates to a foam grinding device for grinding workpieces, comprising a base body made of foam material and abrasive particles fixed to the base body by means of a bonding agent. It is proposed that the foam grinding device, in particular the base body, has a material reinforcement at least partially on its surface.

[0006] The foam grinding device is an abrasive piece used for grinding an object. The grinding process can be realized in the form of manual grinding and / or in the form of machine-implemented grinding. The term "grinding process" includes polishing. The foam grinding device, in particular the base body that gives the foam grinding device its basic shape, can in principle exist in different forms, for example as a block, as a disk, as a roller, as a belt, as a strip or the like. It is also conceivable to integrate the foam grinding device into a glove so that the foam grinding device forms the following surface of the glove: the surface is located on the side of the inner surface of the hand and the inner surface of the fingers. In addition, the foam grinding device can also be manufactured for use with a grinding machine such as an eccentric grinder.

[0007] The matrix of the foam grinding device includes at least one foam material. The foam material is flexible and in particular elastically deformable. The matrix composed of the foam material gives the foam grinding device its basic shape and gives the foam grinding device specific properties in terms of flexibility and stability, in particular in terms of elasticity, ductility, compressibility, shearability, breaking strength and tensile strength. These specific properties decisively characterize the manipulability and performance of the foam grinding device during the grinding process. In one embodiment of the foam grinding device, the matrix can be realized by polyurethane foam material, in particular can be composed of this polyurethane foam material. Polyurethane has favorable hardness and breaking strength. Alternatively, the matrix can also be composed of ethylene-vinyl acetate copolymer (EVA), polyethylene (PE), polypropylene (PP), acrylonitrile-butadiene rubber (nitrile rubber, AB or NBR), polystyrene (PS), polyurethane (PE) or the like.

[0008] The foam grinding device has abrasive grains on at least one surface of the matrix. The at least one surface can be selected in particular as the entire surface of the matrix. Alternatively, at least one surface can also be selected as a part of the entire surface of the matrix. Abrasive grains should be understood as the following elements: the element performs a deformation and / or leveling effect on the object to be processed, that is, the workpiece during the grinding process. The abrasive grains can be composed of metal materials and / or ceramic materials, for example, diamond, corundum, silicon carbide, boron nitride or the like. In one embodiment, the abrasive grains are realized by aluminum oxide particles, and the aluminum oxide particles have a particle size between 7μm and 300μm. The abrasive grains can have any geometric configuration that is considered meaningful by a person skilled in the art. The abrasive grains can be so-called shaped abrasive grains or broken abrasive grains. The abrasive grains cause friction and temperature development on the object to be processed, and the friction and temperature development exert a deformation and / or leveling effect on the object to be processed or in the object to be processed.

[0009] In the case of a foam grinding device, the abrasive particles are adhered to the surface of the substrate by means of a bonding agent. With the aid of the bonding agent, the abrasive particles are particularly adhered to the substrate in a desired position and distribution and are thus fixed. The bonding agent is also used to impart specific properties to the foam grinding device in terms of adhesion, ductility, fracture and tensile strength, flexibility and stability on at least one surface of the foam grinding device. In one embodiment, the bonding agent can be implemented by thermoplastic polyurethane (TPU). The term "thermoplastic polyurethane" includes all urethane-based thermoplastic elastomers and represents a solvent-free adhesive material. Advantageously, the bonding agent composed of thermoplastic polyurethane is a melt-bonding material that can be processed and applied without solvent. "Melt-bonding material" should be understood here in particular as a solvent-free hot bonding material that is essentially solid at room temperature, can be applied in a liquefied state, in particular can be cast or lubricated in a heated state, and establishes a solid connection again when cooled. Alternative bonding agents, such as resin-based bonding agents, which are known to those skilled in the art, can also be considered.

[0010] Typically, in the case of foam grinding elements, the edges and corners of the foam grinding element are subjected to particularly strong stresses during the grinding process, so that the abrasive particles located there and the foam material located thereunder are subjected to high loads. Due to the stresses, the abrasive particles - sometimes together with the adjacent foam material of the base body - are separated from the foam grinding element particularly quickly at the edges and corners and are therefore no longer usable in the further grinding process. In addition, it can happen that the abrasive particles separated in this way introduce undesired scratches or cuts into the surface of the object to be ground, because the abrasive particles move uncontrollably between the object and the foam grinding element during the grinding process. The described degradation - usually degradation of the edges - typically leads to a premature termination of the use of the foam grinding element, although the flat surface areas of the base body can usually still be used further in the grinding process.

[0011] A “material reinforcement” is to be understood in particular as a reinforcement, a hardening or a backing which has a mechanical stabilizing effect on the base body, the connection of the abrasive grain to the base body and / or on the abrasive grain. The material reinforcement is arranged on the surface of the base body. “On the surface” or “close to the surface” is to be understood as meaning that the material reinforcement is arranged outside the surface of the foam abrasive device, in particular the base body, or at least close to the surface on the surface of the foam abrasive device, in particular the base body. “Close to the surface” is to be understood as meaning that the material reinforcement is arranged inside the base body in such a way that the distance of the material reinforcement from the surface is less than 10 mm, in particular less than 5 mm, in particular less than 1 mm. Alternatively, “close to the surface” is to be understood as meaning that the material reinforcement extends to a maximum depth of the foam material which is less than ten times the average cell diameter of the foam material (diameter of the pores or cells in the region close to the surface), in particular less than five times the average cell diameter of the foam material in the region of the surface, in particular less than three times the average cell diameter of the foam material in the region of the surface. Alternatively, "close to the surface" is to be understood as meaning that the material reinforcement is arranged at a distance from the surface (relative to an edge of the base body extending substantially in the direction of the surface normal) of less than 10%, in particular less than 5%, completely, in particular less than 2% inside the base body. "At least partially having a material reinforcement" is to be understood as meaning in particular that the material reinforcement can be arranged in a spatially limited manner in or on the foam abrasive device. In one embodiment, the foam abrasive device has a material reinforcement over its entire surface. Alternatively to this, in another embodiment, the foam abrasive device can be designed with a material reinforcement only on a portion of the surface (for example only on 50% of the surface or only on the corners).

[0012] The invention is based on the recognition that the bonding of the abrasive grains and the foam material mass near the surface to the base body is improved to an unexpected degree by the targeted implementation of at least one material reinforcement on the surface of the foam grinding device, in particular on the surface of the base body. The anti-slip properties of the foam grinding device can be significantly improved. The handling of the foam grinding device can be supported in a targeted manner, for example, in that the material reinforcement causes or at least supports a certain position (haltung) of the foam grinding device and thus causes or at least supports a certain orientation of the foam grinding device. In addition, the processing speed during the grinding process can be significantly increased. Likewise, the grinding effect of corners and edges can be improved, wherein at the same time, the advantageous inherent properties of the foam grinding device, such as, in particular, its elasticity, compressibility, etc., are not lost. The service life (duration of use) of the foam grinding device can be significantly increased, and the total removal amount achieved by the foam grinding device can be increased. Tests have shown that the service life can be doubled compared to the foam grinding devices known from the prior art. The resulting surface quality of the processed workpiece can also be advantageously improved.

[0013] In one embodiment of the foam abrasive element, the material reinforcement is arranged superficially on edges and / or corners and / or faces of the foam abrasive element, in particular the base body. It is conceivable to provide the material reinforcement on all corners and / or all edges.

[0014] It is also conceivable that only some of the edges are designed with material reinforcement, for example, in the case of a cuboid foam grinding element, only along the long edges of the cuboid or along the edges at a distance of 10 mm from the corners or in a similar manner. This makes it possible to achieve targeted reinforcement of edges, corners and / or surfaces.

[0015] In one embodiment of the foamed abrasive element, the material reinforcement is achieved by an excess of adhesive, filler and / or sealant on the base body, which stabilizes the foamed abrasive element, in particular the base body. The excess of adhesive, filler and / or sealant allows the material reinforcement to be achieved in a simple manner.

[0016] Adhesive material is known in principle by prior art. Adhesive material can be, for example, a reactive adhesive material hardened by chemical reaction. Alternatively, adhesive material can be a melting adhesive material. Melting adhesive material can be a material in the list of adhesive materials, which at least includes polymers and resins and natural waxes or synthetic waxes, and the polymers are, for example, polyamides, polyethylene, amorphous polyalphaolefins, ethylene-vinyl acetate copolymers, polyester elastomers, polyurethane elastomers, reactive polyurethane-isocyanates, copolyamide-elastomers or vinylpyrrolidone copolymers / vinyl acetate copolymers, and the resins are, for example, rosin, terpenes, hydrocarbon resins. Alternatively or additionally, adhesive material can be implemented as a two-component adhesive material, which obtains its adhesive properties based on a chemical reaction, and the chemical reaction is at least partially triggered by the mixing of two components. The two components react with each other so as to produce the desired adhesive properties of the two-component adhesive material. For example, the two-component adhesive material can be selected as a two-component adhesive material based on polyurethane.

[0017] Fillers are understood to be substances that are part of the adhesive material and / or serve as additional substances in order to influence the chemical or physical properties of the bonding agent and / or the surface. Such fillers are known in principle from the prior art. For example, Latex Kitt (e.g. "DAP12108") can be used as a filler for foam abrasive elements in order to obtain a flexible but still reinforced edge on the base body.

[0018] A "sealant" is understood to be a substance which is provided to prevent the permeability of liquids or gases through the layer formed by the sealant, typically through the surface of the foam abrasive element. Such a sealant has properties similar to those of an adhesive. Such sealants are known in principle from the prior art. For example, a sealant made of synthetic rubber (e.g. "DAPUltra clear") can be used to achieve compacted and not very compressible corners on the base body of the foam abrasive element.

[0019] The adhesive, sealant and / or filler can be applied to the substrate in a liquid state, in particular, and can be accommodated from the substrate into a recess and / or cavity on or near the surface. Subsequently, the adhesive, sealant and / or filler hardens and solidifies. By hardening the adhesive, sealant and / or filler, hardening is achieved in a material-locked, force-locked and / or form-locked framework, and thus reinforcement of the area near the surface of the foam material is achieved.

[0020] In one embodiment of the foam grinding device, the base body has an open cell structure at least on its surface, which serves to accommodate the excess. In particular, the base body can have an open or open-cell structure at least partially by using a porous and / or air-permeable foam material. Holes, pores and permeable channels in the foam material serve as receptacles for the excess. Adhesives, fillers and / or sealants can penetrate into these receptacles and serve there (after hardening) as material reinforcements.

[0021] In one embodiment of the foam grinding device, the base body has at least one recess on its surface, which is particularly arranged in a targeted manner and is used to accommodate excess. Recesses of this type are material recesses in the foam grinding device, in particular in the foam material of the base body, which are accessible from the outside. The targeted arrangement of the recesses, for example holes, grooves, trenches, recesses or the like introduced into the foam material of the base body, makes it possible to introduce excess adhesive, filler and / or sealant into these receptacles in a targeted manner and use them as material reinforcement there (after hardening). In this embodiment, in particular, closed-cell foams, open-cell foams, open-cell foams with low porosity or mixed-cell foams can also be used. In addition, this embodiment of the foam grinding device can also be used for particularly high-viscosity adhesives, fillers and / or sealants, wherein these high-viscosity adhesives, fillers and / or sealants can be introduced in a simple manner into the recesses arranged in a targeted manner and dimensioned accordingly. In this way, a particularly robust and / or strong material reinforcement can be achieved, for example a particularly reinforced edge of a foam grinding element. In particular, the thickness of the material reinforcement can be adjusted by targeted adjustment of at least one recess. Smaller recesses lead to relatively weaker material reinforcements, while larger recesses lead to relatively stronger material reinforcements. In one embodiment, a particularly strong material reinforcement can be produced by providing a relatively large recess, for example to achieve a particularly hard edge of a foam grinding element.

[0022] In one embodiment of the foam grinding element, at least one recess is arranged along at least one edge of the base body. In this way, the recess can be realized particularly easily, for example by removing edge-forming material of the foam material. Furthermore, such a material-reinforced edge can be used advantageously during the grinding process, since the service life of the foam grinding element is significantly increased and at the same time the maneuverability of the foam grinding element is improved due to the improved slip resistance achieved due to the reinforced edge.

[0023] In one embodiment of the foam grinding device, the material reinforcement is realized by a fiber material (Faser-Material) and / or a filament material (Fiber-Material) applied to the matrix. "Fiber material" should be understood here as a material that is fibrous or formed by fibers. The fiber material can be realized, for example, by polypropylene material, polyethylene material, polyamide material, polyester material. "Fiber material" should be understood here as a material that is filamentous or formed by filaments. The filament material can be realized, for example, by carbon material. In an embodiment, the fiber material and / or filament material can be arranged from the outside in the region of the edge (for example, arranged around the edge), arranged in the region of the corner and / or arranged on the surface (i.e. arranged on the surface). Alternatively or additionally, the fiber material and / or filament material can be added to the foam material of the matrix in a manner close to the surface when the matrix is ​​manufactured, for example, also in the region of the edge, in the region of the corner and / or in the region of the surface. It is conceivable that the fibers of the fiber material or the filaments of the filament material are used in a manner oriented in a preferred direction or distributed in a plane or distributed in any direction over a volume. The fiber material and / or the filament material make it possible to achieve the effect of the material reinforcement in a simple manner. In addition, this can produce a particularly robust material reinforcement.

[0024] In an alternative or additional embodiment of the foam grinding device, the material reinforcement is achieved by a textile material, especially a mesh, applied to the substrate. In one embodiment, the textile material can be laminated or glued to the substrate. The glue can be implemented in particular by means of a bonding agent for fixing the abrasive particles. Alternatively, the textile material can be added to the foam material in a manner close to the surface. The textile material can be a woven ("woven") or non-woven ("non-woven") textile material. Non-woven textile materials are, for example, non-woven fabrics. Non-woven textile materials can be, for example, based on polypropylene, polyamide or polyester. Woven textile materials are generally referred to as woven or knitted fabrics. For example, such textile materials can be applied to one or all surfaces of the substrate. Alternatively or additionally, it is conceivable to apply the textile material to the substrate around the edge.

[0025] In one embodiment of the foam abrasive device, the material reinforcement is achieved by melting the foam material of the base body. In this way, the material reinforcement of the foam abrasive device can be achieved particularly easily. "Melt" means that the material of the foam material of the base body changes its shape (in particular melts) by the action of energy, in particular in the form of heat or UV light, wherein the structure of the foam material changes and thus the material reinforcement is produced. For example, pores and holes on the surface melt and form fused and thus reinforced (thicker) areas, which have enhanced mechanical properties.

[0026] In one embodiment of the foam grinding element, the material reinforcement is achieved by a higher density of the foam material of the base body. This makes it possible to provide the material reinforcement during the production of the base body, wherein post-processing (for example by melting, applying an adhesive or the like) can be omitted. The higher density of the foam material is provided in particular close to the surface.

[0027] In another aspect of the present invention, a method for manufacturing a foam abrasive device according to the present invention is provided. The method comprises at least the following method steps:

[0028] - providing a base body of foam material and subsequently providing the material reinforcement, or providing a base body of foam material with the introduced material reinforcement,

[0029] - coating the substrate with a bonding agent on the surface,

[0030] - Abrasive grains are applied to the surface and fixed by means of a bonding agent.

[0031] It is possible to provide the base body with an already included material reinforcement, for example in the form of a textile material that is already embedded in the foam material.

[0032] It is also possible to provide a base body made of foam material without material reinforcement and then to arrange at least one material reinforcement in or on the foam material close to the surface. In this case, the variants explained with respect to the foam grinding means are conceivable to realize the material reinforcement, for example:

[0033] - applying and / or introducing an excess of adhesive, filler and / or sealant onto or into the base body, for example on the surface, on edges and / or corners and / or faces of the foamed abrasive element, wherein the foamed material has an open cell structure at least on its surface, or wherein the base body has at least one recess on its surface for accommodating the excess;

[0034] - applying and / or introducing the fiber material and / or filament material onto or into the base body, for example onto the surface, onto edges and / or corners and / or onto the surface of the foam abrasive element;

[0035] - applying and / or introducing the textile material onto or into the base body, for example on the surface, on edges and / or corners and / or on the surface of the foam abrasive element;

[0036] - Melting the foam material close to the surface and forming the material reinforcement.

[0037] In this way, it is particularly possible to use typical foam material blanks (for example in the form of plates or webs or rolls made of foam material) in the method according to the invention. For example, the base body can be punched out of a foam material plate and provided for carrying out the method. In addition, in this way, it is possible to carry out a post-treatment of the base body which only affects the area of ​​the base body close to the surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The invention is explained in more detail in the following description based on the embodiments shown in the drawings. The drawings, the specification and the claims contain a large number of feature combinations. It is also practical for a person skilled in the art to observe the features individually and combine them into other meaningful combinations. The same reference numerals in the drawings represent the same elements.

[0039] It shows:

[0040] Figure 1 A schematic cross-sectional view of an embodiment of a foam grinding device according to the prior art;

[0041] Figure 2 A schematic cross-sectional view of an embodiment of a foam grinding device according to the present invention;

[0042] Figure 3 A schematic cross-sectional view of an alternative embodiment of a foam abrasive device according to the present invention;

[0043] Figure 4 A schematic cross-sectional view of another alternative embodiment of a foam abrasive device according to the present invention;

[0044] Figure 5 A schematic perspective view of a substrate for another alternative embodiment of a foam abrasive device according to the present invention;

[0045] Figure 6 One embodiment of a method for producing a foam abrasive device according to the invention. DETAILED DESCRIPTION

[0046] Figure 1 A schematic cross-sectional view of an embodiment of a foam abrasive device 100 according to the prior art is shown. In the embodiment shown, the foam abrasive device 100 has a base body 112 (cuboid) that is rectangular in cross section, and abrasive particles 118 are arranged on the entire surface 120 of the base body. The cross-sectional dimensions of the base body 112 are 70 mm×30 mm. The base body 112 is composed of a polyurethane foam material 114 having an open-cell structure. The abrasive particles 118 are fixed to the surface 120 of the base body 112 by means of a polyurethane-based binder 116.

[0047] Figure 2A schematic cross-sectional view of an embodiment of a foam abrasive device 10 according to the invention is shown. Compared to a foam abrasive device 100 according to the prior art, the foam abrasive device 10 according to the invention has a base body 12 (cuboid) which is rectangular in cross section and abrasive particles 18 are arranged on the entire surface 20 of the base body in the embodiment shown. The cross-sectional dimensions of the base body 12 are 70 mm×30 mm. The base body 12 is composed of a polyurethane foam material 14 with a closed cell structure. The foam abrasive device 10, in particular the base body 12, has a material reinforcement 22 at least partially on its surface 20. In this embodiment, the material reinforcement 22 is arranged on the surface 20 of the base body 12 at the corners 26 of the base body 12 composed of the foam material 14. For this purpose, the base body 12 has a recess 32 at least on its surface 20 at all eight corners 26 (only four corners can be seen here). The recess 32 is a purposefully introduced material depression or indentation for receiving an excess 30 of adhesive material or, in this case, bonding agent 16, wherein the excess 30 stabilizes the foamed abrasive device 10, in particular the base body 12. In this case, the excess 30 is filled into the recess 30 in this exemplary embodiment until the original cuboid shape is completed and hardened there. Thus, the base body 12 provided with the material reinforcement 22 thus forms a cuboid. The abrasive grains 18 are fixed to the surface 20 of the cuboid by means of the bonding agent 16, which comprises the base body 12 and the recess 32 filled with adhesive material (in this case, bonding agent 16).

[0048] Figure 3 A schematic cross-sectional view of an alternative embodiment of a foam abrasive device 10 according to the invention is shown. The base body 12 of this embodiment is composed of a polyurethane foam material 14 with an open cell structure 34 (only a portion of the surface 20 of the base body 12 is shown here). The foam abrasive device 10, in particular the base body 12, has a material reinforcement 22 at least partially on its surface 20. In this embodiment, the material reinforcement 22 is arranged on the surface 20 of the base body 12 on the face 28 of the base body 12. The open cell structure 34 serves to accommodate an excess 30 of adhesive material, which is here a bonding agent 16, wherein the excess 30 advantageously stabilizes the foam abrasive device 10, in particular the base body 12, on its surface 20. In other words, the excess 30 of adhesive material "wets" the open-cell material of the foam material 14 of the base body 12 close to the surface. In this embodiment, the excess 30 is applied or smeared until a substantially flat surface of the base body is formed (the roughness of the surface is, for example, 5 μm). The base body 12 thus provided with the material reinforcement 22 also forms a cuboid. The abrasive grains 18 are fixed by means of the bonding agent 16 on the surface 20 of the cuboid, which comprises the base body 12 and the pores of the open cell structure 34 filled with the bonding material.

[0049] Figure 4 A schematic cross-sectional view of another alternative embodiment of a foam abrasive device 10 according to the invention is shown. The base body 12 of this embodiment is also composed of a polyurethane foam material 14, which, however, has a closed cell structure. The roughness of the surface 20 of the base body 12 is approximately 2.0 μm (not shown enlarged in more detail here). The foam abrasive device 10, in particular the base body 12, has a material reinforcement 22 at least partially on its surface 20. In this embodiment, the material reinforcement 22 is arranged on the surface 20 of the base body 12 over the entire surface 20, that is, on all edges 24, corners 26 and faces 28 of the base body 12. The material reinforcement 22 is realized by a fiber material 36 applied to the base body 12 (alternatively or additionally by a filament material or a textile material). The fiber material 36 advantageously reinforces and strengthens the surface of the foam abrasive device 10. The fiber material 36 also forms recesses (not visible here) between the fibers, which serve to accommodate excess 30 of a bonding material (here, a bonding agent 16), wherein the fiber material 36 is filled with the bonding material until a substantially flat surface of the base body 12 is formed. The bonding material simultaneously serves to bond the fiber material 36 to the base body 12. The abrasive grains 18 are fixed by means of the bonding agent 16 to the surface of the cuboid thus formed, which comprises the base body 12 and the layer of the fiber material 36 filled with the bonding material.

[0050] Figure 5 A schematic perspective view of a base body 12 for another embodiment of a foam abrasive device 10 according to the invention is shown. The base body 12 of this embodiment is made of a polyurethane foam material 14 with a closed cell structure. The roughness of the surface 20 of the base body 12 is approximately 2.0 μm (not shown enlarged in more detail here). The foam abrasive device 10, in particular the base body 12, has a recess 32 on its surface 20, in particular along at least one edge 24. The recess 32 is realized by purposefully arranging a material recess. The recess 32 is used to accommodate excess adhesive material 30, such as in Figure 2 26. In this case, the excess 30 can be filled into the recess 30, for example, until the original cuboid shape is completed and can harden there.

[0051] Figure 6 An embodiment of a method 200 according to the present invention for manufacturing a foam abrasive device 10 according to the present invention is shown, the method comprising:

[0052] - Method step 202: providing a base body 12 consisting of a foam material 14;

[0053] - Method step 204: Arranging a material reinforcement 22 in or on the surface 20 of the base body 12 in a manner close to the surface;

[0054] - Method step 206: coating the base body 12 with the bonding agent 16 on the surface 20;

[0055] Method step 208 : applying abrasive particles 18 to the surface 20 and fixing them by means of a bonding agent 16 .

Claims

1. A foam grinding device (10) for grinding a workpiece, comprising a base body (12) made of a foam material (14) and abrasive particles (18) fixed to the base body (12) by means of a bonding agent (16), characterized in that: The base body (12) of the foam abrasive device (10) has a material reinforcement (22) at least partially on its surface (20), the material reinforcement (22) being realized by an excess portion (30) of an adhesive material, a filler and / or a sealant on the base body (12), the excess portion stabilizing the base body (12) of the foam abrasive device (10), the base body (12) having at least one recess (32) on at least its surface (20), the at least one recess being used to accommodate the excess portion (30), the at least one recess (32) being arranged along at least one edge (24) of the base body (12), the excess portion (30) being able to be filled into the recess (32) until the base body (12) is complete in shape.

2. The foam grinding device (10) according to claim 1, characterized in that: The material reinforcement (22) is arranged on the surface (20) at corners (26) and / or faces (28) of the base body (12) of the foam abrasive device (10).

3. The foam grinding device (10) according to claim 1, characterized in that: The base body (12) has an open cell structure (34) at least on its surface (20), and the open cell structure is used to accommodate the excess portion (30).

4. The foam grinding device (10) according to any one of claims 1 to 3, characterized in that: The material reinforcement (22) is realized by a textile material applied to the base body (12), which can be applied to one surface or all surfaces of the base body and / or around edges.

5. The foam grinding device (10) according to claim 4, characterized in that: The textile material is a net.

6. A method (200) for manufacturing a foam abrasive device (10) according to any one of claims 1 to 5.

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