Grinding device
By designing a flexible grinding device and utilizing a non-woven fabric carrier and toothed hole structure, the tearing problem of the grinding device during the folding process was solved, enabling effective grinding of angular areas and stable use on flat surfaces.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2026-03-27
AI Technical Summary
Existing grinding devices are prone to tearing during folding and unfolding, making it difficult to effectively grind angular areas, and their structure is not flexible enough to adapt to unevenness.
The flexible grinding device includes a flexible carrier element and a tooth hole design that penetrates the entire grinding device. The carrier element is made of non-woven fabric and the grinding element is fixed by an adhesive element. The tooth hole design avoids tearing and enhances the accessibility of the grinding corner.
It achieves stability and flexibility of the grinding device in a folded state, enabling better grinding of angular areas, and is not easily torn when used on flat surfaces, providing excellent grinding results.
Smart Images
Figure CN121752389A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The invention relates to a grinding device according to the preamble of claim 1. BACKGROUND
[0002] It is known that a grinding device has a carrier element made of a nonwoven fabric (Vliesstoff). SUMMARY
[0003] The invention is based on the task of improving a grinding device by simple structural measures.
[0004] The task is solved by a grinding device, in particular a flexible grinding device, for grinding a workpiece, having a grinding element, in particular a flexible carrier element, for arranging the grinding element on the carrier element, and having an adhesive element for holding the grinding element on the carrier element.
[0005] The invention proposes that the grinding device has a perforation, in particular extending through the entire grinding device.
[0006] The invention proposes that the carrier element consists of a nonwoven fabric.
[0007] The grinding device according to the invention is particularly advantageously flexible, whereby the grinding device can be particularly simply, in particular reversibly, folded and unfolded, in particular without the grinding device tearing. Furthermore, the grinding device can be so flexible or elastic that the grinding device can be stretched by more than 5%, in particular more than 10%, preferably more than 15%, more preferably more than 20%, without the grinding device tearing.
[0008] Thereby, in the folded state along the perforation of the grinding device, a stable grinding corner can be provided, which can better reach and grind an angularly delimited region to be ground.
[0009] The perforation facilitates the folding of the grinding device along the perforation. Thereby, the grinding device can be used on a flat surface even in the folded state.
[0010] The grinding device: In particular, the length extension or (in the case of a disc) the diameter of the grinding device is at most 500 mm, in particular at most 400 mm, preferably at most 300 mm, more preferably at most 200 mm, particularly preferably at most 170 mm, for example 150 mm or less. In particular, the thickness of the grinding device is at most 5 mm, in particular at most 3 mm, preferably at most 2 mm, more preferably at most 1 mm, particularly preferably at most 0.5 mm, for example 0.4 mm or less.
[0011] In particular, the grinding device is flexibly constructed to compensate for local unevenness and provide an optimal grinding profile. Flexibility should be understood in particular as being composed of or containing a flexible material.
[0012] The grinding device preferably has multiple grinding elements on one side, particularly on one surface, of the carrier element. The grinding elements are preferably protruding and / or confined grinding elements relative to the carrier element.
[0013] Grinding devices are preferably used for grinding or removing material from workpieces, in which the material of the workpiece is mechanically removed from the workpiece surface in the form of chips. Grinding devices are preferably composite grinding devices.
[0014] Grinding devices can exist in various packaging forms, such as as grinding discs or grinding belts, as sheets, rolls, strips, or webs of ground products (e.g., during manufacturing). Grinding products can be designed, in particular, for use with grinding machines (such as eccentric grinding machines) or for manual grinding.
[0015] Grinding components: Grinding elements are particularly configured for grinding workpieces. Grinding elements particularly have a deformation and / or removal effect on the workpiece to be processed. Grinding elements are particularly constructed as grinding bodies. Grinding elements are also known to those skilled in the art as abrasive grains. Grinding elements are particularly an element that, in the processing state, directly contacts the workpiece to be processed, and this element, in the processing state, causes the removal of abrasive material from the workpiece to be processed.
[0016] The grinding element is preferably constructed as a fragmented and / or shaped grinding element.
[0017] Grinding elements are not limited to a specific material, but can be made of, for example, corundum (in many variants, especially white corundum, semi-molten corundum, blue corundum, zirconium corundum, ceramic corundum and / or brown corundum), silicon carbide, cubic boron nitride, diamond or mixtures thereof.
[0018] Carrier element: The carrier element is preferably made of nonwoven fabric. The nonwoven fabric is preferably made of (finite length) fibers, continuous fibers (filaments), or (cut) yarns. These fibers are preferably combined into nonwoven fabrics, fiber layers, or fiber piles and interconnected in a suitable manner. The carrier element is preferably nonwoven. The carrier element preferably has a large number of fibers. These fibers are preferably cured, especially by a suitable method. The fibers are preferably cured by mechanical, chemical, and / or thermal means. The fibers are preferably cured into (fiber) composite materials. The fibers of the carrier element are preferably interconnected. The carrier element is preferably cured by mechanical, chemical, and / or thermal means. The fibers are preferably cured in a material-locking manner. The fibers are preferably cured by adhesive and / or cohesive means. The fibers are preferably made of thermoplastic materials. Fibers, especially those made from the same raw materials, are preferably connected or bonded together without additional adhesives. The fibers are preferably bonded by, especially, temporary heating and / or pressure. The fibers can preferably be cured by a heated calender or ultrasonic welding equipment. Thus, adjacent fibers can be thermofused together at their contact points. The carrier element is preferably constructed as a spunbond nonwoven fabric.
[0019] The carrier element preferably serves as a carrier layer and imparts specific properties to the grinding device regarding adhesion, elongation, tear strength and tensile strength, flexibility, and stability. The grinding element can preferably be applied to and fixed onto the carrier layer. The grinding element can preferably be arranged and / or bonded to the carrier element using adhesive elements known per se. For example, in a coated grinding device, the grinding element is attached to the carrier element by means of an adhesive element. The adhesive element can pre-fix the abrasive grains to the carrier element in a desired position and distribution. Suitable adhesive elements for attaching grinding elements to carrier elements are well known to those skilled in the art from the prior art.
[0020] The carrier element is made of a material with a unit weight between 35 g / m² and 400 g / m², especially between 50 g / m² and 150 g / m², and preferably between 50 g / m² and 75 g / m².
[0021] The carrier element is configured to be particularly flexible, allowing it to be elastically stretched by more than 15%, particularly more than 20%, more preferably more than 30%, and advantageously more than 35% in both the first direction and a second direction perpendicular to the first orientation. The carrier element and / or the fibers of the carrier element particularly have a tensile strength of at least 70 N, particularly at least 80 N, and preferably at least 100 N. In particular, the thickness of the carrier element is less than 0.4 mm, particularly less than 0.3 mm. This provides a high-temperature resistant carrier element that is resistant to deformation and shrinkage. Thus, the carrier element can be bonded to a TPU (thermoplastic polyurethane) adhesive element without deformation. The carrier element is preferably made of polyethylene terephthalate (PET) instead of polypropylene (PP) or polyethylene (PE).
[0022] Adhesive elements: The adhesive element is preferably configured to hold the grinding element on the carrier element. The adhesive element is preferably constructed as a thin film element, particularly a self-adhesive thin film element, disposed on the side of the carrier element opposite to the grinding side. The adhesive element is preferably connected to the full area of the carrier element. The adhesive element is preferably made of a base adhesive element and / or a cover adhesive element. The adhesive element is preferably configured to cover the carrier element and / or the grinding element. The base adhesive element and / or the cover adhesive element are preferably disposed as a layer on the carrier element.
[0023] Preferably, the adhesive element should be formed as a material or mixture of materials that extends over a particularly large area, arranged in the normal direction of the main extension surface of the carrier element of the grinding device, particularly directly between the surface of the carrier element and the grinding element. The adhesive element is preferably configured for a material-locking connection between the grinding element and the carrier element of the grinding device. This allows for preferred good and reliable adhesion and material-locking connection of the adhesive element on at least one surface of at least one substrate of the grinding unit.
[0024] Synthetic resins, such as phenolic resins, epoxy resins, urea-formaldehyde resins, melamine resins, and polyester resins, are particularly suitable as binder elements. The base binder element and the overlay binder element may also contain other commonly used active ingredients and / or fillers. The binder element is preferably composed of synthetic resins, especially TPU, and preferably phenolic resins. Alternatively, the binder element may comprise or consist of PU (polyurethane) dispersions, acrylates, or epoxy resins.
[0025] The adhesive element preferably possesses sufficient flexibility and stability to enable folding and grinding processes. Preferably, the elongation of the adhesive element (measured according to DIN 53504-S2 standard) is greater than 200%, particularly greater than 400%, and more preferably greater than 600%. Preferably, the melting point of the adhesive element is above 100°C, particularly above 120°C, and preferably above 140°C. For stable use of the grinding device, the operating temperature of the grinding device also needs to be above 160°C, particularly above 180°C, and preferably above 200°C. In particular, the unit weight of the adhesive element is between 80 g / m² and 300 g / m², particularly between 90 g / m² and 180 g / m², and preferably between 120 g / m² and 170 g / m². Preferably, the tear strength of the grinding device has a tear force (measured according to BS EN ISO 1798-2008 standard) preferably greater than 35 N.
[0026] Therefore, a flexible and stable grinding device can be provided. Furthermore, a grinding device can be provided in which the grinding elements can move sideways to each other in a folded state without damaging the opposing grinding elements.
[0027] Tooth holes: The toothed hole extends along the entire extension direction of the grinding device, particularly from one end to the other. The toothed hole extends particularly along the toothed hole line. The toothed hole is particularly composed of multiple slots. The slots particularly penetrate the entire grinding device, particularly extending through the thickness of the grinding device. The slots particularly extend from one side of the grinding device to the opposite side of the grinding device. The slots are particularly surrounded by the grinding device, particularly completely surrounded by the grinding device. In particular, the grinding device, particularly the carrier element and / or binder element, define the slots, particularly completely define the slots. The toothed hole is introduced into the grinding device particularly by means of stamping processes, laser processes, piercing processes (e.g., needle rollers), etc.
[0028] Smaller radii can be achieved through toothed holes, making it particularly easy to grind corners or angular areas. Furthermore, the toothed holes can be configured to prevent tearing of the grinding tool along the toothed holes.
[0029] The dependent claims provide other suitable extensions of the grinding device according to the invention.
[0030] Ideally, the tooth holes should be arranged along a tooth hole line, which extends in a straight line and / or a curved line. This optimizes grinding in hard-to-reach areas. For example, a larger grinding edge can be provided in the case of a curved tooth hole line.
[0031] It is desirable that the grinding device has another toothed hole arranged along another toothed hole line, wherein the other toothed hole line is arranged transversely to, and particularly perpendicular to, the toothed hole line. It is desirable that the toothed hole has two slots and a bridging portion defining the two slots, wherein the length of the bridging portion is less than, in particular, the length of each slot. The slots are particularly slit-like in construction. The width of the slot is particularly much smaller than its length. The distance between two adjacent slots is particularly at least 0.5 mm, particularly at least 0.8 mm, preferably at least 0.9 mm, more preferably at least 1 mm, particularly preferably at least 1.1 mm, further preferably at least 1.2 mm, and also preferably at least 1.4 mm, and / or a maximum of 2.5 mm, particularly a maximum of 2.2 mm, preferably a maximum of 1.8 mm, more preferably a maximum of 1.5 mm, further preferably a maximum of 1.2 mm, for example, 1 mm. In particular, the extension of each slot is at least 1 mm, especially at least 1.2 mm, preferably at least 1.5 mm, more preferably at least 1.8 mm, particularly preferably at least 2 mm, further preferably at least 2.2 mm, and also preferably at least 2.5 mm, and / or a maximum of 4 mm, especially a maximum of 3.5 mm, preferably a maximum of 3 mm, more preferably a maximum of 2.5 mm, further preferably a maximum of 2.2 mm, for example, 2 mm. The slots are arranged particularly along and / or tangentially to the tooth hole line. In particular, the ratio of the extension of each slot to the distance between adjacent slots is particularly configured to be at least 1 to a maximum of 3, especially at least 1.5 to a maximum of 2.5, preferably at least 2.8 to a maximum of 2.2, for example, 2. Thus, a grinding device with particularly advantageous folding characteristics can be provided. When the above ratio is higher, the grinding device can be bent more easily, thereby achieving a smaller bending radius. When the above ratio is lower, a larger bending radius can be achieved. The smaller the distance between adjacent slots, the smaller the grinding surface area, because grinding is performed between the slots while the grinding device is folded. However, the smaller the distance between adjacent slots, the lower the stability of the grinding device in the folded state.
[0032] Ideally, the carrier element is composed of a thermoplastic, particularly cohesive, nonwoven fabric. The nonwoven fabric preferably has multiple bonding sites. These bonding sites preferably form locally cured portions of the fibers of the carrier element, particularly the nonwoven fabric. The bonding sites are preferably arranged uniformly along the extension direction of the carrier element, particularly in its length and width. The bonding sites are preferably spaced apart from each other. The bonding sites are preferably arranged as close as possible to the fiber intersections. The bonding sites are preferably patterned. The bonding sites are preferably manufactured using embossing, ultrasonication, or adhesive printing methods.
[0033] Ideally, the carrier element should be composed of synthetic polymers, particularly polyester nonwoven fabrics, preferably PET nonwoven fabrics.
[0034] Ideally, the carrier element should have indentations / depressions, particularly for receiving the adhesive element. This allows for a more robust connection between the carrier element and the adhesive element.
[0035] Ideally, the carrier element has a first carrier side and a second carrier side opposite to the first carrier side, wherein an adhesive element and / or a grinding device is arranged on the first carrier side, and another adhesive element and / or another grinding device is arranged on the second carrier side. Thus, in the folded state of the grinding device, the opposing grinding elements can be embedded in the gap between the grinding elements and interlocking can be achieved. This reduces or prevents slippage between the two overlapping grinding areas of the grinding device, thereby enabling better grinding operations in the folded state using this grinding device.
[0036] Ideally, the adhesive element is disposed directly on the carrier element. Preferably, the adhesive element is disposed directly on and connected to the carrier element without the use of intermediate elements, especially intermediate layers. Preferably, the adhesive element covers the entire surface area of the carrier element. Preferably, the adhesive element is disposed on both sides of the carrier element. Preferably, the adhesive element limits the carrier element on both sides. Preferably, the adhesive element is constructed as an adhesive layer. This provides a particularly flexible and robust grinding device.
[0037] Ideally, the adhesive element is arranged substantially between the carrier element and the grinding element. Ideally, the adhesive element has a first adhesive side facing the carrier element and a second adhesive side facing away from the carrier element. In particular, the adhesive element is substantially structurally constructed on the first adhesive side. In particular, the adhesive element is substantially flat constructed on the second adhesive side. Thus, in the folded state of the grinding device, the grinding elements can be embedded in and held between the opposing adhesive elements, and will not rub against each other or become dull in the grinding state.
[0038] Ideally, the groove and the recess intersect. The recess is specifically designed to receive the adhesive element. The recess is formed, in particular, through the bonding portion of the carrier element, especially the nonwoven fabric. Thus, in the region of the recess of the carrier element, the adhesive element (especially its thickness) creates a certain height difference.
[0039] A system comprising a plurality of grinding devices according to any one of the preceding claims, characterized in that the grinding devices are interconnected through another tooth hole. Attached Figure Description
[0040] Further advantages are apparent from the following description of the accompanying drawings. Embodiments of the invention are illustrated in the drawings. The drawings, description, and claims comprise combinations of multiple features. Those skilled in the art will consider these features individually and summarize them into other meaningful combinations. This is illustrated here: Figure 1 : A view of the grinding device in its folded state during manual grinding; Figure 2 : A cross-sectional view of an exemplary grinding device; Figure 3 Another cross-sectional view of an exemplary grinding device; Figure 4 View of the grinding device; Figure 5 : Enlarged view of the carrier element; Figure 6 : A view of the grinding device in its folded state; and Figure 6 Another view of the grinding device in its folded state.
[0041] In the following figures, the same components are given the same reference numerals. Detailed Implementation
[0042] like Figure 1 As shown, the current grinding device 11 is used for manual or manual machining of the workpiece.
[0043] Figure 2 A flexible grinding device 11 for grinding a workpiece is shown, comprising a grinding element 13, a flexible carrier element 15 for arranging the grinding element 13 on the carrier element 15, and an adhesive element 17 for holding the grinding element 13 on the carrier element 15.
[0044] The grinding device 11 has a toothed hole 21 that extends through the entire grinding device 11. The carrier element 15 is made of non-woven fabric.
[0045] Currently, the grinding device 11 has multiple grinding elements 13 on the grinding side, wherein the grinding elements 13 protrude relative to the carrier element 15 and limit the carrier element 15.
[0046] The grinding device 11 is preferably used for grinding or removing material from a workpiece, in which the material of the workpiece is mechanically removed from the workpiece surface in the form of chips. The grinding device 11 is preferably a compound grinding device 11.
[0047] The grinding device 11 can exist in different packaging forms. Currently, the grinding device 11 is constructed as a rectangular portion of a grinding roll.
[0048] Currently, the grinding element 13 is configured for grinding workpieces and is constructed as a crushing and / or forming grinding element 13.
[0049] Currently, the carrier element 15 is made of nonwoven fabric and has a large number of fibers. These fibers are mechanically and / or thermally cured, especially material-locked, by suitable methods to form a (fiber) composite material, thereby correspondingly curing the carrier element 15. The fibers are cohesively cured and constitute a thermoplastic material. The carrier element 15 is constructed as a spunbond nonwoven fabric.
[0050] The carrier element 15 serves as a carrier layer, on which the grinding element 13 is applied and fixed. The grinding element 13 is arranged and bonded to the carrier element 15 by means of an adhesive element 17, which is known per se. The carrier element 15 is made of a material with a unit weight between 35 g / m² and 400 g / m², particularly between 50 g / m² and 150 g / m², and preferably between 50 g / m² and 75 g / m².
[0051] The carrier element 15 is flexibly constructed such that it can be substantially elastically stretched by more than 15%, particularly more than 20%, more preferably more than 30%, and advantageously more than 35% in a first direction and a second direction perpendicular to the first direction. The carrier element 15 and / or the fibers of the carrier element 15 have a tensile strength of at least 70 N, particularly at least 80 N, preferably at least 100 N, wherein the thickness of the carrier element 15 is less than 0.4 mm, particularly less than 0.3 mm. Currently, the carrier element 15 is made of polyethylene terephthalate (PET).
[0052] The adhesive element 17 is configured to hold the grinding element 13 on the carrier element 15 and to connect it to the carrier element 15 over its entire area. The adhesive element 17 is configured to cover the carrier element 15 and / or the grinding element 13 and is arranged as a layer on the carrier element 15.
[0053] Currently, the adhesive element 17 is configured for material locking connection between the grinding element 13 and the carrier element 15 of the grinding device 11. The adhesive element 17 is made of synthetic resin, especially TPU, preferably phenolic resin.
[0054] Currently, the toothed hole 21 extends from one end to the other along the entire extension direction of the grinding device 11. Figure 4 , 6 7). The toothed hole 21 extends along the toothed hole line 23. The toothed hole 21 consists of a plurality of slots 25. Each slot 25 extends through the entire thickness of the grinding device 11. Each slot 25 extends from one side (front) of the grinding device 11 to the opposite side (back) of the grinding device 11. The slots 25 are substantially completely surrounded by the grinding device 11. The grinding device 11, or carrier element 15 and adhesive element 17, completely delimit the slots 25.
[0055] The toothed holes 21 are arranged along a toothed hole line 21, which may extend in a straight line and / or a curved path. The grinding device 11 has another toothed hole 21 (not shown) arranged along another toothed hole line 21, which is transverse to, and particularly perpendicular to, the toothed hole line 21. Each toothed hole 21 has at least two slots 25 and a bridging portion 27 defining the two slots 25, wherein the length of the bridging portion 27 is less than the length of each slot 25. The slots 25 are slit-like. The width of each slot 25 is much smaller than its length. In particular, the distance between two adjacent slots 25 (the length of the bridging portion 27) is at least 0.9 mm and at most 1.2 mm, for example, 1 mm. Currently, the extension of each slot 25 is at least 1.8 mm and at most 2.2 mm, for example, 2 mm. The slots 25 are arranged along the toothed hole line 21. Currently, the ratio of the extension of each slot 25 to the distance between each adjacent slot 25 is configured to be approximately 2.8 to 2.2, for example, 2.
[0056] The carrier element 15 is made of thermoplastic cohesive-cured nonwoven fabric. The nonwoven fabric has multiple bonding sites 33, which form locally cured portions of the fibers of the carrier element 15, particularly the nonwoven fabric. The bonding sites 33 are uniformly arranged along the extension direction, or length and width, of the carrier element 15. The bonding sites 33 are spaced apart from each other. The bonding sites 33 are preferably arranged at the fiber intersections and form a pattern. The bonding sites 33 are preferably manufactured by embossing, ultrasonication, or adhesive printing methods.
[0057] The carrier element 15 is made of a synthetic polymer, particularly polyester nonwoven fabric, preferably PET nonwoven fabric. The carrier element 15 has an indentation / recess 35 for receiving the adhesive element 17. The indentation / recess 35 is formed through an adhesive portion 33. The carrier element 15 has a first carrier side and a second carrier side opposite to the first carrier side, wherein the adhesive element 17 and / or the grinding device 11 is arranged on the first carrier side, and wherein another adhesive element 17 and / or another grinding device 11 is arranged on the second carrier side. Figure 3 ).
[0058] The adhesive element 17 is disposed directly on the carrier element 15, i.e., without using intermediate elements, especially intermediate layers, but directly on and connected to the carrier element 15. The adhesive element 17 covers the entire surface area of the carrier element 15. The adhesive element 17 is disposed on both sides of the carrier element 15. The adhesive element 17 defines the carrier element 15 on both sides and is configured as an adhesive layer.
[0059] The adhesive element 17 is substantially arranged between the carrier element 15 and the grinding element 13. Figure 2 , Figure 3The adhesive element 17 has a first adhesive side facing the carrier element 15 and a second adhesive side facing away from the carrier element 15, wherein the adhesive element 17 is substantially structurally constructed on the first adhesive side and substantially flat on the second adhesive side.
[0060] The slot 25 intersects with the recess 35, which is configured to receive the adhesive element 17. The recess 35 is formed through the bonding portion of the carrier element 15, particularly the nonwoven fabric.
Claims
1. A grinding device (11), particularly a flexible grinding device, for grinding a workpiece, said grinding device having: Grinding element (13). A carrier element (15), particularly a flexible carrier element, for arranging the grinding element (13) on the carrier element (15), and An adhesive element (17) is used to hold the grinding element (13) on the carrier element (15). in, The carrier element (15) is made of non-woven fabric. The grinding device is characterized by having a toothed hole (21), particularly a toothed hole extending through the entire grinding device (11).
2. The grinding device according to claim 1, characterized in that, The toothed holes (21) are arranged along a toothed hole line (21), wherein the toothed hole line (21) extends in a straight line and / or in a curved manner.
3. The grinding device according to any one of the preceding claims, characterized in that, The grinding device has another tooth hole (21) arranged along another tooth hole line (21), wherein the other tooth hole line (21) is arranged laterally and particularly vertically relative to the tooth hole line (21).
4. The grinding device according to any one of the preceding claims, characterized in that, The toothed hole (21) has two slots (25) and a bridging portion (27) that limits the two slots (25), wherein the length of the bridging portion (27) is less than the length of the slots (25), especially the length of each slot.
5. The grinding device according to any one of the preceding claims, characterized in that, The carrier element (15) is composed of a thermoplastic, especially cohesive, nonwoven fabric.
6. The grinding device according to any one of the preceding claims, characterized in that, The carrier element (15) is composed of a synthetic polymer, especially a polyester nonwoven fabric, preferably a PET nonwoven fabric.
7. The grinding device according to any one of the preceding claims, characterized in that, The carrier element (15) has a recess (35) which is particularly used to receive the adhesive element (17).
8. The grinding device according to any one of the preceding claims, characterized in that, The carrier element (15) has a first carrier side and a second carrier side opposite to the first carrier side, wherein the adhesive element (17) and / or the grinding device (11) are arranged on the first carrier side, and wherein another adhesive element (17) and / or another grinding device (11) are arranged on the second carrier side.
9. The grinding device according to any one of the preceding claims, characterized in that, The adhesive element (17) is directly disposed on the carrier element (15).
10. The grinding device according to any one of the preceding claims, characterized in that, The adhesive element (17) is substantially arranged between the carrier element (15) and the grinding element (13).
11. The grinding device according to any one of the preceding claims, characterized in that, The adhesive element (17) has a first adhesive side facing the carrier element (15) and a second adhesive side facing away from the carrier element (15), wherein the adhesive element (17) is substantially structurally constructed on the first adhesive side and substantially planar on the second adhesive side.
12. The grinding device according to any one of the preceding claims, characterized in that, The groove (25) intersects with the recess (35).
13. A system comprising a plurality of grinding devices (11) according to any one of the preceding claims, characterized in that, The grinding device (11) is interconnected through the other tooth hole (21).