EP3956490A1

EP3956490A1 - Coated abrasive tool, method for producing same, and abrasive dental product

Info

Publication number: EP3956490A1
Application number: EP20720423.1A
Authority: EP
Inventors: Reinhold Riemensperger; Enrico FLADE
Original assignee: Ecocoat GmbH
Current assignee: Ecocoat GmbH
Priority date: 2019-04-18
Filing date: 2020-04-17
Publication date: 2022-02-23
Also published as: DE102019205745A1; US20220033950A1; WO2020212595A1; CN114144539A

Abstract

The invention relates to a coated abrasive tool (10) comprising a carrier (12) which has a carrier material and comprising an abrasive surface coating (14) on a surface region (12-A) of the carrier (12). The abrasive surface coating (14) has abrasive functional particles (16) and a thermoplastic binder (18) for an adhesive connection between at least some of the abrasive functional particles (16) and the carrier material. At least some of the abrasive functional particles (16) on the surface region (12-A) of the carrier (12) are partly integrated into the carrier material and are connected to the carrier material, and at least some of the abrasive functional particles (16) on the surface region (12-A) of the carrier (12) are additionally partly integrated into the thermoplastic binder (18), said thermoplastic binder (18) being connected to the abrasive functional particles (16) and the carrier material.

Description

Coated abrasive tool, method of making the same

and abrasive dental product

description

Embodiments of the present invention relate to a coated abrasive tool, to a method for producing the same, and also to an abrasive dental product. In particular, embodiments of the present invention relate to a coated abrasive tool in the form of a grinding tool, a polishing tool and / or a cleaning tool and to its production and its use in the dental field as a dental cleaning and / or grinding product.

Hard material grains that are used for grinding, i.e. for material removal by machining with bonded grain, are generally referred to as abrasives or abrasives. A distinction can be made between natural grain materials and synthetic grain materials. Abrasives applied to carrier materials are also referred to as coated abrasives, the abrasive then sitting on the surface of the carrier material. Furthermore, abrasives can also be shaped into abrasive articles. The grinding tools include z. B. cutting discs, grinding discs and diamond grinding discs etc.

In the case of the illustrated abrasives on a base or abrasive bodies, when they are used, the abrasive coating is removed from the top (= the current surface of the sanding element) downwards, so that there is continuous wear of the sanding element and thus a reduction in the abrasive and / or cleaning effect of the element comes. Furthermore, the removal of the grinding element and thus the wear of the abrasive of the grinding element is directly dependent on the pressure of the grinding element on the workpiece to be processed.

The object on which the present invention is based is thus to create an improved coated abrasive tool which has a high, reliable and defined grinding and / or cleaning effect with low wear, ie a lower abrasion of the abrasive functional particles (hard particle grains) compared to conventional grinding elements.

The present invention is also based on the object of creating an improved method for producing such a coated abrasive tool.

This object is achieved by the independent claims with the device claim 1 and the method claim 12. Further developments according to the invention are defined in the subclaims.

According to one embodiment, a coated abrasive tool comprises a carrier, which has a carrier material, and an abrasive surface covering on a surface area of the carrier, wherein the abrasive surface covering abrasive functional particles and a thermoplastic binder for an adhesive connection between at least some of the abrasive functional particles and the carrier material, at least some of the abrasive functional particles on the surface area of the carrier being partially embedded in the carrier material and connected to the carrier material, and at least some of the abrasive functional particles on the surface area of the carrier also being embedded in the thermoplastic binder or partially embedded, the thermoplastic binding agent being connected to the abrasive functional particles and the carrier material.

According to one embodiment, a method for producing a coated, abrasive tool comprises the following steps: Feeding a powder mixture to a thermal or low-thermal plasma spray device which is directed onto a surface area of a carrier to be coated, the powder mixture having abrasive functional particles and a thermoplastic binder the powder mixture has the functional particles and the thermoplastic binding material as separate powder particles, or the powder mixture has the functional particles at least partially or completely coated with the thermoplastic binding agent, and in the thermal or low-thermal plasma spray device a reduction in the viscosity of the Binder is effected, and application of the functional particles with the reduced viscosity binder to a surface area of the carrier, the thermoplastic The binder re-solidifies when applied to the surface area of the carrier and the abrasive surface coating is formed on the carrier of the abrasive tool with the functional particles and the thermoplastic binder.

The core concept of the present invention is now to provide a low-wear, coated, abrasive tool such. B. a grinding tool, a polishing tool, a cleaning body or a coated brush to provide, wherein the abrasive functional particles, d. H. the abrasive or the abrasive materials are firmly bonded to the carrier material or substrate. For this purpose, on the one hand, the abrasive functional particles are partially or at least partially embedded or anchored in the carrier material, with a thermoplastic binder or polymer also being applied to the surface area of the carrier and the abrasive functional particles, so that the abrasive functional particles are also applied to the surface area are embedded or partially embedded in the thermoplastic binder, ie the thermoplastic binder is connected to the abrasive functional particles and the carrier material in a material and / or form-fitting manner. A reliable, firmly adhering fixation of the abrasive functional particles on the carrier can thus be achieved in order to maintain the wear-resistant abrasive surface covering of the abrasive tool. The thermoplastic binder (also: thermoplastic binder) thus also serves as protection or wear protection for the embedded, abrasive functional particles or grinding particles. As a result, due to the reduced wear of the abrasive surface covering, an increased service life of the coated, abrasive tool can be achieved.

The thermoplastic binding agent can also reduce the adhesion of the removed material to the coated, abrasive tool, so that the removed material or the dead loop can be removed or sucked off relatively easily from the abrasive surface covering, for example by means of an air flow. This reduces the clogging of the tool, which leads to a longer service life.

Based on the material properties of the thermoplastic binder, both the removal behavior of the abrasive surface covering and the sliding properties of the abrasive surface covering on the workpiece to be processed can also be set or adapted to the material properties of the workpiece to be processed. The abrasive surface coating can be designed as a surface coating (= side surface coating) and / or an edge coating (= face surface coating) of the abrasive tool. The abrasive surface coating can be used for abrasive dental products, such as. B. use a dental cleaning product or a dental abrasive product, since the material removal can be adjusted extremely precisely via the materials used in the carrier, the thermoplastic binder and the abrasive functional particles (grains). In this way, abrasive dental products can be produced and provided which, on the one hand, only carry out a surface cleaning of the workpiece to be processed, such as B. the cleaning of teeth by means of a suitably designed toothbrush, and on the other hand achieve a smoothing or grinding effect on the workpiece to be processed, such. B. on a dental ceramic crown, with an appropriately designed grinding head or grinding drill.

Furthermore, the coated abrasive tool can, for example, be produced extremely efficiently using the production method described.

Preferred exemplary embodiments are explained in more detail below with reference to the accompanying drawings. Show it:

Fig. 1a is a schematic representation in a perspective top view (= 3D view) of a surface area of e.g. fully coated abrasive tool according to an embodiment;

1b shows a schematic cross-sectional view of a surface area of a coated abrasive tool according to an embodiment;

2 shows a schematic cross-sectional illustration of a surface area of a coated abrasive tool which has an open-pore substrate or carrier material, according to a further exemplary embodiment;

3 shows a schematic block diagram of a device or a system for coating a tool with an abrasive surface covering according to a further exemplary embodiment; 4 shows a schematic flow diagram of a method for producing a coated abrasive tool according to a further exemplary embodiment; 5a-b show a schematic side view and sectional view of an abrasive dental product in the form of a toothbrush head according to a further exemplary embodiment; and

6a-b show a schematic side view and sectional view of an abrasive dental product in the form of a toothbrush head according to a further exemplary embodiment.

Before exemplary embodiments of the present concept are explained in more detail below with reference to the drawings, it is pointed out that identical, functionally identical or identically acting elements, objects, functional blocks and / or method steps are provided with the same reference symbols in the different figures, so that those in different Embodiments illustrated description of these elements, objects, function blocks and / or method steps are interchangeable or can be applied to one another.

Various embodiments will now be described more fully with reference to the accompanying drawings, in which some embodiments are shown. In the figures, dimensions of elements, layers and / or areas shown may not be shown to scale for the sake of clarity.

To simplify the description of the different exemplary embodiments, the figures have a Cartesian coordinate system x, y, z, the xy plane corresponding to the main surface area of the carrier or substrate or being parallel to the same and the vertical direction being perpendicular to the xy- Is level and corresponds to the depth direction through the abrasive surface covering. In the following description, the term “lateral” means a direction in the xy plane (or parallel thereto), while the term “vertical” means a direction in the ± z direction (or parallel thereto). In the following, a coated abrasive tool 10 according to an exemplary embodiment will now be described with reference to FIGS. 1a-b. Fig. 1a shows a perspective See a view of a surface area 10-A of the coated abrasive tool 10, while FIG. 1b shows an enlarged partial section of the surface area 10-A of the coated abrasive tool 10 in a cross-sectional illustration. As shown in FIGS. 1 a-b, the coated abrasive tool 10 has a carrier or a base body 12 and an abrasive surface covering 14 on a surface region 12-A of the carrier 12. Depending on the field of application of the abrasive tool 10, the carrier 12 can have, for example, a rigid carrier material or a flexible or elastic carrier material. The surface covering 14 is therefore arranged, for example, on the surface region 12-A of the carrier 12, which is intended to act as an abrasive machining surface of the coated abrasive tool 10.

The abrasive surface covering 14 has abrasive functional particles 16 and a thermoplastic binder 18, for. B. a thermoplastic polymer material, for an adhesive connection between at least some of the abrasive functional particles 16 and the carrier 12. At least a part, e.g. B. at least 60%, 80%, 90% or 99%, the abrasive functional particles 16 is at the surface area 12-A of the carrier 12 at least partially (partially or completely) embedded or anchored in the carrier material and thus firmly adhered to the Carrier material connected. The partial embedding of the abrasive functional particles 16 in the carrier 12 thus forms, for example, a form-fitting connection. The embedded abrasive functional particles 16 are also referred to as bound grains 16. According to one embodiment, the abrasive functional particles 16 are only partially embedded in the carrier 12 and thus form the form-fitting connection, for example.

As is shown by way of example in the schematic illustration in FIG. 1 a of the abrasive surface area 14, the abrasive surface covering can be distributed according to an exemplary embodiment or also formed over the entire surface, ie the spaces between the abrasive functional particles 16 on the carrier 12 can be partially or completely, for example with the thermoplastic binder 18 and optionally one or more other applied materials 18 '(for example additive materials 18' which improve the sliding properties). Thus, a coating can be arranged as an abrasive surface covering 14 on the carrier 12, which depending on the (set) coverage or distribution density of the abrasive functional particles 16, the thermoplastic binder 18 and the additive materials 18 'over the entire surface or also distributed (spaced) the surface area 12-A is formed. The additi- Ven materials 18 ′ can also be bound or integrated into the thermoplastic binder 18. The abrasive surface covering 14 with the combination of the abrasive functional particles 16, the thermoplastic binder 18 and the optional additive materials 18 * can therefore be designed as a continuous or flat or even as a distributed monolayer. The abrasive functional particles (16) also protrude from the optional additive material 18 ', for example.

According to a further exemplary embodiment, as shown for example with reference to FIG. 1b, the abrasive surface covering 14 can also be applied “non-areally” (not completely covering) to the carrier 12, so that in a top view of the surface area 12-A surface regions of the carrier material are exposed on the carrier 12. The surface coverage by the abrasive surface covering 14 on the carrier 12 can thus be, for example, in a range from 1% (5% or 10%) to 100%.

The abrasive functional particles 16 can thus be partially or completely covered or enclosed by the thermoplastic binder 18, with the wear properties, abrasion properties, sliding properties and, via the applied amount of the thermoplastic binder 18 and thus the partial or complete coverage of the functional particles 16 / or adhesion properties for the removed material can be adjusted or matched to the material of the work piece to be processed, which nevertheless leads to a bond in the spaces between the functional particles 16. At least a part, e.g. B. at least 60%, 80%, 90% or 99%, the abrasive functional particles 16 is embedded in the surface area 12-A of the carrier 12 in the thermoplastic binder 18, the thermoplastic binder 18 with the abrasive functional particles 16 and the carrier material - and / or cohesively connected. The abrasive surface covering 14 with the combination of the abrasive functional particles 16 and the thermoplastic binder 18 can thus also be designed here as a non-area-covering (not completely covering or closed) monolayer.

In the context of the present description, a material for the abrasive functional particles is referred to as abrasive insofar as it has a rubbing or grinding effect on a workpiece to be processed (not shown in FIGS. 1 a-b), which in turn has a smoothing, cleaning or wearing effect on the workpiece to be processed.

The abrasive effect of the coated abrasive tool can also be adjusted via the embedding depth of the abrasive functional particles 16 in the carrier material, via the carrier material and / or via the material of the thermoplastic binder 18. The elasticity of the carrier material and the elasticity of the thermoplastic binder 18 can be adjusted and / or coordinated with one another. In the context of the present description, a material is referred to as elastic if the material or the material changes its shape under the action of force and can return to the original shape within the linear-elastic behavior when the acting force disappears.

For example, using the material properties of the thermoplastic binder 18 and other optionally applied additional materials, such as PTFE (polytetrafluoroethylene), graphite, ceramic and molybdenum sulfide (MoS ₂ ) as a dry lubricant, the resulting sliding properties of the coated abrasive tool 10 over the surface of the workpiece to be processed (not shown in Fig. 1a-b). In the context of the present description, thermoplastic materials (thermoplastic or plastomer) are plastic materials that can be “thermoplastically” deformed in a certain temperature range. This process is reversible, ie it can be hardened again by cooling. As long as there is no overheating of the thermoplastic material (= so-called “thermal decomposition”), the properties of the thermoplastic material before and after heating remain unchanged or are retained, ie before and after application to the coated abrasive tool 10, there the molecular chains of the thermoplastic material are not destroyed or separated. This is an essential property of the thermoplastic binder 18, in particular for the production method illustrated with reference to FIGS. 3 and 4.

In one embodiment, an additional material 18 ′ can furthermore be applied as a surface covering material to the existing abrasive surface covering 14 in order to adjust the resulting sliding properties of the coated abrasive tool 10. The additional material 18 ^* can be used simultaneously with the thermoplastic binder 18 or after can be applied to the surface area 12-A of the carrier 12 which is provided with the abrasive functional particles 16 in addition to the thermoplastic binder 18. Thus, the additional material or additional materials can also be integrated or introduced into the thermoplastic binder 18 for setting the properties of the abrasive surface covering 14. For example, by using dry lubricants such as PTFE, graphite, ceramic and molybdenum sulfide (MoS ₂ ), reduced friction can be obtained between the abrasive tool 10 and the workpiece to be machined. The carrier material of the carrier 12 can, for example, be a combination of different materials, e.g. a carrier 12 with a PUR carrier layer and an SBR cover layer, the abrasive functional particles 16, e.g. diamond, with the thermoplastic binder 18, e.g. POM, and the optional additional material 18 ', for example a lubricant (PTFE), are arranged on the carrier 12.

According to one embodiment, the abrasive functional particles 18 have a mean or average diameter d1, which is between 100 nm and 2 mm, for example. At least a part, e.g. B. at least 80%, 90% or 99%, the abrasive functional particles 18 of the abrasive surface covering 14 is embedded in an average (mean) embedment depth d2 in the carrier material, the embedment depth d2 at least 5% (or 10%) and e.g. corresponds to at most 95% (99%) of the average diameter d1 of the abrasive functional particles 18. The abrasive functional particles 16 are therefore at least partially or completely embedded or anchored in the carrier material on the surface area 12-A of the carrier 12 and are thus firmly connected to the carrier 12, i.e. for example positively connected.

In order to obtain a sufficient cleaning, grinding and / or removal effect of the abrasive surface covering 14, it is sufficient that only a small part, e.g. B. about 1 to 5% of the average diameter d1, the abrasive functional particles are exposed or exposed and protrude from the carrier material and / or the thermoplastic binder.

During an exposure, grinding or removal process, the highest pressure force is exerted on the surface of the workpiece to be machined via the abrasive functional particles 16 protruding at least slightly from the abrasive surface covering 14, the abrasive functional particles 16 in the elastic material of the thermo- plastic binding agent 18 and / or the carrier 12 are (relatively) elastically fixed and the abrasive tool 10 can follow the contour of the workpiece to be processed. An extremely effective surface treatment of the surface of the workpiece can thus be achieved with extremely little wear on the abrasive tool 10.

Arranging the abrasive functional particles as a monolayer in the abrasive surface covering 14 ensures that a very large number of abrasive functional particles 16 grip at the same time during a machining process, i.e. H. act on the workpiece to be machined, so that the cleaning, grinding and / or removal process can be carried out extremely effectively.

The combination of embedding the abrasive functional particles in the carrier material and embedding the abrasive functional particles in the thermoplastic binder results in an extremely adhesive connection or anchoring of the abrasive functional particles 16 on the carrier 12.

Depending on the materials used for the carrier material, the abrasive functional particles 16 and the thermoplastic binder 18, there is a material and / or form-fitting connection of these components for firmly adhering or anchoring the abrasive functional particles 16 to the carrier 12. In the case of "inert" abrasive functional particles 16, the partial embedding of the abrasive functional particles 16 in the carrier material essentially results in a form-fitting connection between the abrasive functional particles 16 and the carrier material of the carrier 12, with a corresponding form-fitting connection of the "inert" abrasive functional particles 16 with the thermoplastic binder 18 are present. Furthermore, depending on the materials, a material connection (for example adhesive connection) of the thermoplastic binding agent 18 with the carrier material of the carrier 12 and / or a form-locking connection (= interlocking) of the applied thermoplastic binding agent 18 with the carrier material of the carrier 12, for example a open-pored carrier material.

According to one exemplary embodiment, it is also possible, in the case of a non-inert material of the abrasive functional particles 18, that these functional particles are also materially connected to the thermoplastic binder 18 and / or the carrier material of the carrier 12. According to one embodiment, at least 60%, 80% or 90% of the area of the abrasive surface covering 14 is covered with a monolayer of the abrasive functional particles 16 on the surface area 12-A of the carrier 12, ie in one layer or in one plane. The applied and embedded, abrasive functional particles 16, together with the thermoplastic binder 18, thus form an abrasive surface covering 14 in which the abrasive functional particles 16 are arranged in a single layer or two-dimensionally (xy plane).

According to one embodiment, the applied thermoplastic binder 18 has an average thickness d4, the average thickness d4 of the applied thermoplastic binder 18 being smaller than the average diameter d1 of the abrasive functional particles 16, so that the abrasive functional particles 16 partially protrude from the thermoplastic binder 18. As shown in FIG. 1b, the majority of the abrasive functional particles 16 are arranged next to one another on the surface area 12-A of the carrier. However, a few of the applied abrasive functional particles 16 can also be arranged "on top of one another" or "clumped" on the surface area 12-A of the carrier (see Fig. 1b - far right), but this is largely avoided by the production method 300 described below can. Since the abrasive functional particles 16 are designed, for example, as a mono-layer (single-layer on the carrier material) in combination with the thermoplastic binder 18 as the abrasive surface covering 14, an extremely dimensionally stable abrasive tool 10 can be implemented which also has extremely good sliding properties on the has workpiece to be machined, d. H. the abrasive tool 10 can be guided over the surface of the workpiece to be machined with relatively little effort.

According to one embodiment, the abrasive functional particles 16 on the surface area 12-A of the carrier 12 can have an occupancy density A (= distribution of the abrasive functional particles 16 on the surface area 12-A) with A = 0.1-100%, or A = 0.1 - 10% or A = 1 - 5%, ie the abrasive functional particles 16 are distributed or also arranged over the entire surface of the treated surface area of the component. The thermoplastic binder 18 can then cover the resulting interstices of the surface area 12-A of the carrier 12 with an occupancy density B with B = 100% - A, B z 90% - A, or B z 80% - A, ie completely (B = 100%) or partially (B z 90% or B z 80%). Thus, by selecting the density or distribution density A of the abrasive functional particles 16 on the surface area 12-A of the carrier 12, the removal effect can also be set in a targeted manner. For example, an increased density A of the abrasive functional particles 16 can contribute to an increased removal effect of the abrasive tool 10.

According to one embodiment, the surface area 12-A of the carrier 12 can be (relatively) smooth or flat (as shown by way of example in FIGS. 1a-b).

According to a further exemplary embodiment, the surface region 12-A of the carrier 12 can be profiled and, for example, has knobs, a pyramid shape, a truncated pyramid shape, a cone shape, a truncated cone shape or a wave shape in cross section. By choosing the profile or the topology of the surface area 12 -A of the carrier 12, the removal effect can also be set in a targeted manner.

According to a further exemplary embodiment, the surface area 12-A of the carrier 12 provided with the abrasive surface covering 14 can also have a groove structure or a structure with spirally arranged depressions or elevations (= screw structure) of the surface area.

Since the abrasive functional particles 16 are designed as a monolayer in combination with the thermoplastic binder 18, the abrasive surface covering 14 can follow the surface contour of such a profiled carrier 12 extremely precisely, that is, a relatively fine, detailed contour of the carrier 12 remains after the abrasive has been applied Surface coating 14 obtained on surface area 12-A. Thus, for example, so-called "grinding pads" (grinding pads) can be provided by the coated abrasive tool 10, which, based on the topography of the carrier 12, can be set to specific grinding angles, such as for grinding the flanks of gears, etc. Due to the Elastic carrier material, such grinding pads 10 can also follow the 3D surface of the workpiece to be processed (object to be ground), so that slight unevenness on the workpiece to be processed does not have a negative or essentially non-negative effect with regard to the resulting grinding effect when used as a dental cleaning product (toothbrush) an advantageous property for achieving an essentially borrowed complete cleaning of the workpiece to be machined, e.g. B. the teeth when brushing your teeth.

The profiling of the surface area 12-A of the carrier 12 can also help to remove impurities, i.e. For example, removed material or grinding dust of the processed workpiece can be easily transported to the outside so that the grinding dust that is produced can be removed or sucked off more easily without clogging the grinding tool 10, so that a long service life of the grinding tool 10 can be achieved.

This surface profiling on the surface area 12-A of the carrier 12 can take place, for example, during the method 300 described below for producing a coated, abrasive tool 10 by applying the thermal or low-temperature spray device (plasma spray device) to the carrier material by thermal action desired profiling of the surface area of the carrier 12 is introduced and obtained.

According to exemplary embodiments, the geometric configuration of the surface area 12-A of the carrier 12 can essentially assume any free-form surface, which is designed, for example, as a counterpart or negative shape with respect to the workpiece to be processed, the processing being a grinding process, cleaning process, rolling process, etc. can.

If, for example, the workpiece is now spherical or spherical segment-shaped, the carrier 12 can have a surface area 12-A, which is designed as a negative shape or a counterpart to the spherical or spherical segment-shaped workpiece. Further possible geometrical configurations of the surface area 12-A of the carrier 12 can be, for example, a cylindrical shape, cone shape, truncated cone shape etc. or a thread structure in order to create the negative shape for a corresponding workpiece (= 3D body) in the form of e.g. B. a ball, a recess, a hole, a passage, a thread, etc. to form. However, these lists of 3D bodies are not to be regarded as conclusive.

By forming the surface area 12-A of the carrier 12 as a negative shape of the surface area 12-A of the workpiece 12 to be machined, a planar machining or planar loading of the abrasive tool 10 on the to be machined Surface area of the workpiece are exercised. In this way, an extremely uniform grinding, polishing and / or cleaning effect can be obtained for any 3D bodies (= workpieces to be processed). As a result of the uniform and flat machining of the workpiece, an extremely uniform grinding, polishing and / or cleaning pattern can be achieved by the abrasive tool 10 on the workpiece to be machined.

According to one embodiment, the coated abrasive tool 10 may comprise a carrier material with e.g. Cork, textile, rubber, rubber, elastomer, PVC (polyvinyl chloride), PUR (polyurethane), paper, latex, PE (polyethylene), PA (polyamide), PET (polyethylene terephthalate), PC (polycarbonate), SBR (styrene-butadiene Rubber), PTHF (polytetrahydrofuran), carbonate, with a foam material, a bristle material of a brush and / or a film material. The carrier material can, for. B. be flexible or elastic.

According to an embodiment, the abrasive functional particles 16 can be designed as hard particles or grains and e.g. Corundum, zirconium corundum, silicon carbide, bomitride, glass, minerals, e.g. Apatite, natural substances, e.g. have crushed or crushed sleeve shells, nut shells, etc., or diamond with a particle size between 100 nm and 2 mm. According to one embodiment, the abrasive functional particles 16 can comprise an inert material, e.g. a stable and under given conditions unreactive material. Via the concentration and / or hearing of the abrasive functional particles 16 in the abrasive surface covering 14, the resulting removal of the abrasive tool 10 can now also be set (with a defined pressure).

According to one embodiment, the coated abrasive tool 10 can use a thermoplastic binder 18 with a thermoplastic polymer material such as PE (polyethylene), PA (polyamide), PC (polycarbonate, ABS (acrylonitrile-butadiene-styrene), PVC (polyvinyl chloride), PET (polyethylene terephthalate) ), PEEK (polyetheretherketone), PTFE (polytetrafluoroethylene), PUR (polyurethane), PMMA (polymethyl methacrylate) or PTHF (polytetrahydrofuran). The carrier material can also be flexible or elastic, for example, with the abrasive functional particles, ie the abrasive or the abrasives, reliably adherent, e.g. positively, are connected to the same. According to one exemplary embodiment of the coated abrasive tool 10, the thermoplastic binder 18 and the carrier material 12 can have the same material or the same material composition. Through this connection or anchoring of the abrasive functional particles 16 on the carrier 12, the z. B. has an elastic carrier material, a certain freedom of movement of the abrasive functional particle (= abrasive grain) 18 can be achieved during a grinding process, so that when (increased) pressure is exerted on the coated abrasive tool 10, ie when the coated abrasive tool is pressed against it a workpiece to be machined, the embedded abrasive functional particles (= bonded abrasive grains) 16 do not break away, break out of the bond or break as in the case of conventional grinding elements, but rather an evasive movement, e.g. immersion, due to the flexibility or elasticity of the carrier material, into the carrier material and / or perform an elastic, lateral tilting. This possible vertical and / or lateral evasive movement of the embedded abrasive functional particles 16 can thus result in a type of 3D mobility of the embedded abrasive functional particles 16. In this way, the wear of the embedded, abrasive functional particles can be significantly reduced, whereby an extremely dimensionally stable coated abrasive tool can be provided.

In particular, by choosing the material of the thermoplastic binder, d. H. For example, the respective hardness of the thermoplastic binder, in coordination with the abrasive functional particles and the z. B. elastic carrier material, the removal effect, the sliding properties with respect to the workpiece to be machined and also the mechanical stability of the abrasive tool can be set in a targeted manner. For example, an increased hardness of the thermoplastic binder, i. a hard or rigid thermoplastic binder, contribute to an increased abrasive effect, improved sliding properties and increased stability of the abrasive tool.

In summary, it can thus be stated that the inventive attachment of the abrasive functional particles 16 to the carrier material, that is, on the one hand by embedding or anchoring the abrasive functional particles 16 in the carrier material and on the other hand by embedding the abrasive functional particles 16 in the thermoplastic binder 18 and the the resulting material or form-fitting connection (= adhesive connection) of the abrasive functional particles 16 on the carrier material, an extremely reliable adhesive connection between the abrasive functional particles 16, which act as cutting materials, and the carrier material of the carrier 12 can be obtained. Due to the above-described "3D mobility" of the embedded abrasive functional particles 16 on the carrier 12 and the resulting, firmly adhering connection between the abrasive functional particles 16 and the carrier 12, relatively large, abrasive functional particles 16 with an unchanged surface processing result on the workpiece to be processed Compared to conventional abrasives with the present concept, abrasive functional particles 16 with an average particle size at least twice or even three times as large can be used. Thus, with a conventional abrasive with a grain size of P3000, abrasive functional particles with an average diameter of 7 μm used while in the present inventive abrasive tool 10 with a grain size of P3000 on the flexible carrier 12 due to the 3D mobility of the abrasive functional particles 16 with an average particle size (d50) of 15-25 μm, 18-22 pm and about 20 pm can be used.

As a result of the possible use of relatively large, abrasive functional particles 16, a higher material removal and thus a faster processing speed can be achieved by the abrasive tool 10 compared to a conventional abrasive with an essentially identical surface result. Furthermore, the use of larger abrasive functional particles 16 leads to an increased service life of the abrasive tool 10, since larger functional particles 16 have a larger area for connection and thus for a firm connection with the carrier material of the carrier.

The 3-D mobility of the abrasive functional particles 16 on the carrier 12 leads in particular to a homogeneous, two-dimensional machining effect, ie to a very homogeneous grinding, bollard and / or cleaning pattern on the workpiece to be machined. In particular with conventional abrasives scratches caused by a so-called "rolling grain" can be eliminated, since the abrasive functional particles 16 can "immerse" in the flexible or open-pored carrier material of the carrier 12 when there is a high or increased force. The abrasive tool 10 according to the invention can thus effectively prevent an optical change in the machining image on the one to be machined, even with an unevenly distributed contact pressure Workpiece comes, which is particularly advantageous for machining in "manual operation". Thus, a homogeneous, recurring machining pattern, ie grinding, polishing and / or cleaning pattern, can also be realized in manual operation. Even tilting of the abrasive tool 10 on the other hand Workpiece to be processed by the operator or an operating device can be compensated for by the 3-D mobility of the abrasive functional particles 16 on the carrier 12, or the effects can at least be greatly reduced.

The size and / or concentration of the abrasive functional particles 16 in the abrasive surface area and / or the hardness of the thermoplastic binder 18 can now also be used to adjust the resulting removal of the abrasive tool 10 (with a defined pressure). Furthermore, there is relatively little wear of the abrasive tool 10, i. H. Relatively little removal of the abrasive functional particles (cutting materials) 16 can be achieved in the application, so that the coated abrasive tool 10 according to the invention can achieve considerably longer service lives than grinding elements known in the prior art.

Since the abrasive functional particles 16 are designed, for example, as a "Moho layer" in combination with the thermoplastic binder 18 as the abrasive surface covering 14, an extremely dimensionally stable abrasive tool 10 can be realized which also has extremely good sliding properties on the surface to be processed Has workpiece, ie the abrasive tool 10 can be guided with relatively little effort over the surface to be processed of the workpiece to be processed.

The applied thermoplastic binder 18 can also provide a protective effect for the carrier 12 or the carrier material, such as. B. with a foam as a carrier material.

Furthermore, the applied, thermoplastic binding agent 18 can contribute to the fact that the grinding dust, ie the material removed from the workpiece to be processed, can be removed or sucked off relatively easily, so that the abrasive grinding tool 10 is essentially not clogged, and thus a large amount Service life of the abrasive grinding tool 10 can be achieved. Furthermore, there is the possibility of a flat suction of the grinding dust using an open-pored carrier 12, e.g. a PUR foam or a flow Materials (= open-pored tissue) through the abrasive grinding tool 10. The abrasive grinding tool 10 can be arranged, for example, by means of a Velcro fastener or another air-permeable connection on a processing arrangement provided with a suction device. The abrasive grinding tool 10 can thus be designed to be permeable for an air flow and for removal particles (grinding dust).

The thickness of the open-pored carrier 12 can for example be in a range between 0.5 mm and 12 mm, the suction power generally being higher, the thinner the carrier 12 is.

The coated, abrasive tool 10 can be designed as a grinding tool, a polishing tool, a cleaning or grinding pad (wheel) or a cleaning body. Furthermore, the coated abrasive tool 10 can be designed, for example, as a brush, the abrasive surface covering being arranged on an upper or front side of a brush set (= bristles) of the brush.

The coated abrasive tool 10 can be used, for example, for grinding and polishing paint surfaces without paste, e.g. B. in the automotive sector, in boats, etc., when processing glass (especially with a flexible carrier 12), when grinding and polishing metal surfaces, when cleaning metal surfaces and / or when cleaning and processing floor coverings can be used effectively.

According to one embodiment, the coated abrasive tool 10 can also be implemented, for example, as a windshield wiper blade, the abrasive functional particles 16 with the thermoplastic binding agent 18 being arranged on the windshield wiper blade (not shown) and for improved sliding properties, less wear and a high level of abrasion, i.e. a high cleaning effect, from stubborn dirt on the windshield such as insects etc. By embedding the abrasive functional particles 16 in the abrasive surface covering 14, wear of the glass material of the windshield can be avoided.

If the abrasive tool 10 is designed as a windshield wiper blade, the abrasive surface covering 14 can be arranged, for example, on side surface areas and optionally on the wiping edge of the windshield wiper blade. For the abrasive functional particles 16 can be used, for example, materials that have a relatively low or lower hardness than the glass material of the windshield, e.g. B. Mohs hardness. For example, in addition to the materials already mentioned for the abrasive functional particles 16, minerals, for example apatite, or natural substances, for example crushed or ground husk shells, nut shells, etc., can also be used.

Furthermore, the coated abrasive tool can, for example, be produced extremely efficiently using the production method described below. According to an exemplary embodiment, the abrasive effect of the abrasive tool 10 can be adjusted via the distribution density and / or size of the abrasive functional particles 16 applied as a monolayer on the surface area 12-A of the carrier 12. FIG. 2 shows a schematic cross-sectional illustration of a surface region 12-A of a coated abrasive tool 10 according to a further exemplary embodiment, which has an open-pored substrate or carrier material 12. As shown in FIG. 2, the carrier material 12 has an open-pored surface area 12-A with an average pore diameter d3, the abrasive functional particles 16 having an average diameter or an average particle size d1 with d1 s

S 1/4 d3 have ^1/6 d3 or d1. The specified size ratios can ensure that the abrasive surface covering 14 can be designed as a coating close to the contour. By arranging the abrasive functional particles 16 with the thermoplastic binding agent 18 as a monolayer, the abrasive surface covering 14 can be arranged extremely close to the contour on the open-pored surface area 12-A of the carrier material 12, so that when a workpiece is machined with the coated abrasive tool 10, extremely many abrasive functional particles 16 can act on the surface covering of the workpiece to be machined and thus the machining process can be carried out extremely effectively.

Foam or fleece, for example, can be used as an open-pored carrier material. A typical foam material is elastic and has a compressive strength according to DIN 53577 or ISO 3386 of 20 - 60. This corresponds to a pressure of 2 - 6 kPa with 40% compression of the foam. As also shown in FIG. 2, a small number of abrasive functional particles 16 ′, for example less than 20%, 10%, 2% or 1%, of the abrasive functional particles 16 on the surface area 12-A of the carrier 12 can be in the carrier material embedded and thus anchored therein (form-fitting and firmly adhering) without a thermoplastic binding agent 18 for an additional adhesive binding being additionally present there.

This situation can occur, for example, at surface areas 12-A of the carrier material 12 which have an undercut 12-B with respect to a vertical (= z-direction in FIG. 2), such abrasive functional particles 16 'based on the kinetic energy obtained during the coating process and can be brought to the embedding position in the undercut area 12-B by means of an elastic impact (= rebound) on another embedded abrasive functional particle 16. Otherwise, the above statements with regard to the coated abrasive tool 10 from FIGS. 1 a-b are equally applicable to the coated abrasive tool 10 from FIG. 2. Further, for example, the coated abrasive tool can be manufactured extremely efficiently by the manufacturing method described below; the abrasive surface covering 14 can be designed as a contour-conforming coating.

3 shows a schematic block diagram of an apparatus or a system 100 for coating a tool 10 with an abrasive surface covering 14 according to a further exemplary embodiment.

According to an exemplary embodiment, a device 100 for conveying and metering powder 112 comprises a powder storage container 110 for storing and providing powder 112, a conveyor 120, for example a vibratory conveyor, with a conveying device 122 with an adjustable conveying rate for dispensing the powder 112 to a powder dispenser. Let 124 with the adjustable conveying rate, a line arrangement 130 for conveying the powder 112 discharged by the conveyor 120 in a conveying gas 115 as a powder-gas mixture 116 and for supplying the powder-gas mixture 116 to a powder processing device 200, with a decoupling device 132 is provided in the line arrangement 130 in order to take a defined portion PM2 of the powder 112 from the powder-gas mixture 116, a powder quantity measuring arrangement 140 for detecting the extracted powder quantity PM2 per unit of time and for providing one Powder quantity information signal S1, wherein the withdrawn or decoupled powder quantity PM2 per unit of time within a tolerance range has a predetermined ratio to the powder quantity PM1 conveyed by the conveyor 120, and a control device 150 which is designed to measure the powder quantity information signal provided by the powder quantity measuring arrangement 140 S1 to set the adjustable delivery rate of the conveyor 120 to a predetermined setpoint.

Due to the extremely exact dosage of the required amount of powder to the powder processing device, e.g. B. to a plasma coating arrangement or a plasma nozzle for plasma spraying, essentially any surface structures of the coated abrasive tool 10 can be coated extremely evenly and precisely with the one abrasive surface covering 14, the abrasive properties of the applied abrasive surface covering 14 being set and dimensioned very precisely can be. Furthermore, the applied layer structures or the abrasive surface covering can be connected to the component to be coated in a material and / or form-fitting manner or formed in one piece.

3 thus shows, in a schematic representation of the principle, a device 100 for conveying or supplying and metering powder 112 according to an exemplary embodiment. The device 100 for conveying and metering powder 112 has a powder storage container 110 for storing and providing powder 112. The device 100 further comprises a conveyor 120, e.g. a vibratory conveyor, with a conveyor device or conveyor trough 122, the conveying rate of which is adjustable for delivering the powder 112 to a powder outlet 124 in order to provide a powder quantity PM1 per unit of time (e.g. per second) at the powder outlet 124. The device 100 further comprises a line arrangement 130 for conveying the powder 112 dispensed by the conveyor 120 in a conveying gas 115 as a powder-gas mixture 116 and for feeding the powder-gas mixture 116 to an (optional) powder processing device 200 which is used for Example can be designed as a plasma coating arrangement or plasma nozzle 200 for plasma spraying in accordance with DIN 657. The line arrangement

130 further comprises a decoupling device or a bypass 132 in order to decouple or remove a defined portion or a defined powder quantity PM2 of the powder 112 from the powder-gas mixture 116. The device 100 further comprises a powder quantity measuring arrangement 140 for detecting the extracted powder amount per time unit and for providing a powder amount information signal S1 based on the extracted powder amount per time unit. The decoupling device 132 is now designed so that the withdrawn powder amount PM2 per unit of time within a tolerance range has a predefined ratio to the conveyed powder amount PM1 (total powder amount) of the conveyor 120 and thus also a predefined ratio to the powder amount PM3 (= conveyed powder amount PM3 (= conveyed) from the line arrangement 130 to the powder processing device 200 Amount of powder PM1 minus amount of powder removed PM2) per unit of time.

The device 100 further comprises a control device 150 which is designed, based on the powder quantity information signal S1 provided by the powder quantity measuring arrangement 140, to control the conveyor or vibratory conveyor 120 with a control signal S2 in order to increase the conveying rate of the conveyor 120 to a predetermined target or value Target value, ie to the target conveying rate PM1, so that the exact metering of the conveyed amount of powder PM1 and thus the amount of powder PM3 supplied to the powder processing device 200 can be obtained.

So that the control of the conveyor 120 carried out by the control device 150 to set the conveying rate of the conveyor 120 to a predetermined target conveying rate provides sufficiently good feed and metering results, a tolerance range is introduced within which the withdrawn powder quantity PM2 per unit of time that is derived from the puhzer gas Mixture is decoupled by means of the decoupling device 132, should be present in a predetermined fixed ratio to the conveyed powder amount or total powder amount PM1 of the conveyor 120. A tolerance range is therefore introduced for the predefined ratio between the amount of powder PM2 removed per unit of time and the amount of powder PM1 conveyed per unit of time by the conveyor 120. The tolerance range can thus indicate, for example, that the actual ratio of the powder amount removed per unit of time to the total amount of powder conveyed per unit of time of the conveyor 120 is less than 20%, 10%, 5%, 2%, 1% or 0.1% of the specified Ratio deviates or there is no or only a negligibly small deviation. The lower the tolerance range is assumed and can be maintained, the more precisely the control device 150 can set the adjustable delivery rate of the conveyor 120 to the predetermined target delivery rate.

The tolerance range can include, for example, changing environmental parameters, such as temperature, etc., or different physical properties of the powder, such as size and / or density of the powder particles, or changes (fluctuations) in the gas pressure or the gas temperature of the conveying gas 115 or other environmental parameters and / or influencing variables.

According to one exemplary embodiment, the decoupling device 132 is designed to extract a predefined proportion or the predetermined ratio of the powder quantity PM1 delivered by the conveyor 120 at the powder outlet 124 and transported in the line arrangement 130 in the powder-gas mixture 116. For example, the decoupling device 132 can be provided with a decoupling path 133 as a line or pipe section of the line arrangement 130. In particular, the decoupling device 132 can be subdivided into different volume areas along the flow direction of the powder-gas mixture in order to obtain a homogeneous distribution of the powder-gas mixture in the decoupling device 132 in order to achieve the predefined ratio between the removed powder quantity PM2 as precisely as possible per unit of time and the conveyed powder amount PM1 of the conveyor 120 or the powder amount PM3 supplied to the powder processing device 200. According to one embodiment, the decoupling device 132 can have an inlet area, an expansion area or suction area, a homogenization area, a decoupling or extraction area and an output or compression area in the flow direction of the powder / gas mixture.

According to one exemplary embodiment, the powder quantity measuring arrangement 140 is designed to detect or determine the weight of the extracted powder quantity PM2 per time unit based on the withdrawn or extracted powder quantity PM2 per unit of time. Based on the recorded weight of the extracted powder amount per unit of time, the powder amount information signal S1 can then be provided by the powder amount measuring arrangement 140 to the control device 150.

In one embodiment, the amount of powder measuring system 140 may be configured as a load cell or level to ^"11 to directly detect the weight (or mass) of the extracted amount of powder per time unit.

According to a further exemplary embodiment, the powder quantity measuring arrangement 140 can be designed to optically detect the number of extracted powder particles 112 and provide the powder quantity information signal S1 with the number of extracted powder particles to the control device 150. According to a further exemplary embodiment, the powder quantity measuring arrangement 140 can be configured to optically detect the number and, for example, the respective size or the average size of the extracted powder particles 112 and the powder quantity information signal S1 with the number and (respective or average) size of the extracted powder particles to be provided to the control device 150.

Based on the number and (respective or average) size of the extracted powder particles, the volume of the extracted powder amount PM2 per unit of time can be determined, based on the determined volume of extracted powder per unit of time and also the (e.g. predetermined) material density of the powder particles used the weight of the extracted powder quantity PM2 per unit of time can be determined. The determination or calculation of the volume and / or the weight of the extracted powder quantity PM2 per unit of time can take place in the powder quantity measuring arrangement 140 or also in the control device 150.

During the optical detection of the extracted powder quantity PM2, the powder quantity information signal S1 provided by the powder quantity measuring arrangement 140 can include at least the number of extracted powder particles, provided the average size and the average material density of the extracted powder particles is known and available as information. Thus, for example, the powder quantity measuring arrangement 140 or the control device 150 can perform the calculation of the weight of the extracted powder quantity PM2 per unit of time.

According to one embodiment, the control device 150 is designed to determine the current conveying rate PM1 of the conveyor 120 based on the powder quantity information signal S1 and, if the current conveying rate of the conveyor 120 deviates from the target conveying rate, then to control the conveyor 120 in order to increase the current conveying rate PM1 to set the target delivery rate PM.

During operation of the device 100 for conveying and metering powder 12, the control device 150 can thus be designed to continuously set or track the instantaneous, adjustable conveying rate of the conveyor 120 to the desired target conveying rate. The conveying device 122 of the conveyor 120 as a vibratory conveyor is excited, for example, to convey the powder or the powder particles 112 to an oscillating movement perpendicular and parallel to the conveying direction, the vibrating conveyor 120 being designed to generate an oscillating movement of the conveying device 122 with an oscillation frequency of 1 Hz to 1 Hz kHz or from 50 Hz to 300 Hz or above with an oscillation amplitude or oscillation amplitude in a range from 1 pm to 1 mm or from 5 pm to 200 pm in order to obtain the adjustable delivery rate.

According to one embodiment, the conveyor 120 can be designed as a piezoelectrically or magnetically driven conveyor device 122, i. H. the oscillation frequency and amplitude is obtained by means of piezoelectric and / or magnetic actuators.

According to an exemplary embodiment, the control device 150 can now be designed to feed the control signal S2 to the conveyor 120 based on the powder quantity information signal S1 in order to adjust the oscillating movement of the conveyor device 122 of the conveyor 120 and to obtain the target conveying rate.

According to an embodiment, the powder storage container 110 has an outlet device or an outlet valve 114 for providing the powder to the conveying device 122. For example, the delivery rate of the powder 112 or the powder amount RM0 per unit of time from the powder storage container 110 to the conveyor 122 of the vibratory conveyor 120 depends on the set distance D1 between the outlet end 114-A of the outlet 114 and the conveying surface area 122-A of the conveyor 122 .

According to one embodiment, a distance setting device (not shown in FIG. 3) for setting the distance or the gap D1 between the outlet end 114-A of the outlet device 114 and the conveying surface area 122-A of the conveying device 122 can be provided, for example in order to pre-meter or Provide coarse metering of the powder quantity RM0 provided by the powder storage container 110 to the conveying device 122 of the conveyor 120.

As has already been addressed above, the powder processing device 200 can process the powder-gas mixture 116 with the set amount of powder PM3 is made available per unit of time, for example as a plasma coating arrangement or a plasma nozzle for plasma spraying in accordance with DIN 657. The powder conveying device 100 can generally be used for all applications for the metered conveyance or supply of an aerosol to the powder processing device 200. Particles or solids conveyed in a carrier gas are referred to as aerosols, for example. In addition to plasma coating or plasma spraying applications, the powder delivery device 100 can also be used in laser deposition welding processes or laser plasma coating processes.

The overall arrangement 101 shown in Fig. 3 for the production of a layer structure 270, e.g. of the abrasive surface covering 114 on a surface region 262 of a component 260 can thus have the device 100 described above for conveying and metering powder 112 and a plasma coating arrangement 200. The plasma coating arrangement 200 can, for example, have a plasma source for introducing a plasma into a process area in order to activate the powder particles provided in the process area with the plasma, and can furthermore have an application device or outlet nozzle for applying the activated powder particles to the surface area of the component to obtain the layer structure on the surface area of the coated abrasive tool 10.

4 shows a schematic flow diagram of a method 300 for producing a coated abrasive tool 10 according to a further exemplary embodiment. The method 300 for producing a coated abrasive tool 10 can be carried out, for example, with the device 100 shown in FIG. 3 for coating a tool 10 with an abrasive surface covering 14. According to one embodiment, the method 300 for producing a coated, abrasive tool has a step 310 of supplying a powder mixture to a thermal spray device, e.g. according to DIN EN657, or a low-temperature spray device which is directed at a surface area 12-A of a carrier 12 to be coated , wherein the powder mixture has abrasive functional particles and a thermoplastic binder. The powder mixture has the functional particles 16 and the thermoplastic binding material 18 as separate powder particles, or the powder mixture has the functional particles 16 at least partially or completely coated with the thermoplastic binder 18. Furthermore, a reduction in the viscosity of the thermoplastic binder 18 is brought about in the thermal or low-thermal spray device.

Based on the required energy input in the spray device, a thermal spray device 200 or a low-thermal spray device 200 is used. The influence of the energy input of the spray device 200 is based on the size of the abrasive functional particles, the larger the functional particles 16, the more energy is required to activate the thermoplastic binding agent 18, i.e. to be transferred into the melt. In addition, the melting point of the thermoplastic binder and carrier material must be taken into account with regard to the energy input of the spray device 200, the higher the melting point of the carrier 12 or of the thermoplastic binder 18, the more energy is required to feed it into the melt convict.

In a step 320 of method 300, the abrasive functional particles 16 are applied to a surface area 12-A of the carrier 12 with the binder 18 having a reduced viscosity, the thermoplastic binder 18 solidifying again when applied to the surface area 12-A of the carrier 12 and the abrasive surface covering 14 is formed on the carrier 12 of the abrasive tool 10 with the functional particles 16 and the thermoplastic binder 18. According to one embodiment, the thermoplastic binding agent 18 and the abrasive functional particles 16 (in regions) are applied simultaneously to the surface region 12-A of the carrier 12 and bonded to the carrier material in a material and / or form-fitting manner.

According to one embodiment, when the abrasive functional particles 16 are applied 320 to the surface area 12-A of the carrier 12, at least some of the abrasive functional particles 16 are partially embedded in an embedding depth d3 of the carrier material of the carrier 12, the embedding depth d3 being at least 5 % (or 10%) and at most 95% (or 99%) of an average diameter d1 of the abrasive functional particles, with 0.95 d1 z d2 z 0.05 d1. This embedding of the abrasive functional particles 16 impinging on the carrier 12 in the carrier material takes place, for example, based on the kinetic energy of the abrasive functional particles 16 obtained during the coating process. According to one embodiment, the method 300 has a step 330 of setting the distribution density of the functional particles 16 (as mono -Layer) on the surface 12-A via the proportion of the abrasive functional particles 16 in the mixture of thermoplastic binder 18 and functional particles 16, which is fed to the spray device 200 in order to see the abrasive functional particles (16) in combination with the thermoplastic binder ( 18) as a mono-layer.

According to one exemplary embodiment, the method 300 has a step 340 of setting the powder feed rate and the feed rate over the carrier surface 12-A, so that when the abrasive functional particles 16 and the thermoplastic binder 18 are applied at least 60% of the area of the abrasive surface covering 14 as a mono Position of the abrasive functional particles 16 in combination with the thermoplastic binder (18) on the surface area 12-A of the carrier 12, ie single layer, is formed. According to one exemplary embodiment, the carrier 12 has an open-pore surface area 12-A with an average pore diameter d3, the functional particles 16 having an average diameter d1 with d1 £ 16 d3 or d1 £% d3 in order to create an adhesive connection of the abrasive surface covering that is the Topography of the open-pored surface area follows contour, to be effected as a monolayer on the open-pored carrier surface.

According to one embodiment, the carrier material comprises cork, textile, rubber, rubber, elastomer, PVC, PUR, paper, latex, PE, PA, PET, PC, SBR, PTHF, carbonate, a foam material, a bristle material of a brush and / or a film material having. According to one embodiment, the abrasive functional particles are designed as hard particles and have corundum, zirconium corundum, silicon carbide, boron nitride, glass, minerals (apatite), natural substances (sleeve shells) or diamond with a particle size between 100 nm and 2 mm, the thermoplastic binder PE , PA, PC, ABS, PVC, PET, PEEK, PTFE, PUR, PMMA or PTHF. In the present method 300 for producing a coated abrasive tool 10, the starting material for coating is first made available, the abrasive functional particles 16 (= cutting materials) being mixed with a thermoplastic binding material or polymer material 18. The abrasive functional particles can already be bound with the thermoplastic binder or, alternatively (or additionally), the abrasive functional particles 16 and the thermoplastic binder 18 (for example polymer particles) can be supplied to the spray device 200 in a homogeneously distributed manner. The concentration of the polymer material can for example be in a range between 5 and 95% (MP). The connection of the starting material, ie the abrasive functional particles 16 and the thermoplastic binding agent 18, to the carrier 12 takes place by means of a thermokinetic process. Optionally, after the abrasive surface covering 14 has been applied to the carrier 12, a thermal pressing process (for mechanical pressure exertion) can also take place at an elevated temperature.

In the following, with reference to FIGS. 5a-b and 6a-b, a plurality of configurations of the coated abrasive tool 10 as an abrasive dental product 50, e.g. B. dental cleaning product, dental grinding product or dental polishing product shown and explained. As will be explained below, the abrasive dental product 50 has the coated abrasive tool 10 as a processing element or active element.

A number of different possible implementations of the coated abrasive tool 10, e.g. B. in an abrasive dental product 50, described by way of example. In the present description of the exemplary embodiments, elements with the same technical structure and / or the same technical function have the same reference number or the same name, a detailed description of such elements not being repeated for each exemplary embodiment. The above description with regard to FIGS. 1a-b, 2, 3 and 4 is thus equally applicable to the further exemplary embodiments as described below. In the following description, the differences, e.g. B. additional elements or additional functionalities to the embodiments described above and the resulting technical effects are discussed.

FIGS. 5a-b now show a schematic side view and sectional view of an abrasive dental product 50 in the form of a dental cleaning product or toothbrush head 52 according to a further exemplary embodiment. According to the exemplary embodiment of the abrasive dental product 50, the carrier 12 can have a foam material as the carrier material, the abrasive surface covering 14 being arranged on a surface region 12-A of the foam material. The abrasive surface covering 14 in turn has the abrasive functional particles 16 and the thermoplastic binder 18, the abrasive functional particles 16 being applied as a monolayer. The foam material of the carrier 12 can, for example, be designed with open pores and can furthermore be elastically deformable. According to one exemplary embodiment, the abrasive dental product 50 is designed as a dental cleaning product, the coated abrasive tool 10 being arranged on the abrasive dental cleaning product 50 as a cleaning pad (= cleaning pad). The dental cleaning product 50 can be a toothbrush head 52 of an electric or manual toothbrush, with the coated abrasive tool 10 being arranged as a cleaning abrasive pad on the toothbrush head 52.

According to one exemplary embodiment, a support structure 12 - 1 for the carrier material of the cleaning abrasive pad 10 is provided on the dental cleaning product 50. Thus, the carrier 12 can have the support structure 12-1 on which the carrier material is arranged, the carrier material being mechanically fastened to the support structure 12-1 and surrounding the support structure 12-1 in regions or in a cap shape.

The support structure 12-1 can, for example, be made air-permeable (at least in some areas) in order to make the carrier material of the carrier 12 accessible on both sides for drying or hygiene treatment (e.g. with a disinfectant). The cleaning pad 10 can be arranged to be replaceable or permanently connected to the support structure 12-1. The support structure 12 - 1 can therefore also be provided, for example, for a fixed or also detachable, mechanical fixing of the cleaning sanding pad 10 to the dental product 50. Furthermore, the cleaning sanding pad 10 can for its part be mechanically fixed or fastened to the support structure 12-1 in a fixed or also detachable manner.

According to one embodiment, the foam material of the carrier 12 can be used as a solid foam material with a thickness of, for example, approx. 10 mm ± 1 mm (solid body - see Fig. 5a) or as an alternative, relatively thin layer with a thickness of, for example, approx. 2 mm ± 0, 2 mm (Fig. 5b). According to one embodiment, the coated abrasive tool 10 designed as a cleaning sanding pad can have, for example, a flat sanding surface 14-A or an outwardly curved (convex) sanding surface (dashed line) 14-B. With an outwardly curved (convex) grinding surface (dashed line) 14-B, the carrier 12 can also have a correspondingly adapted outwardly curved (convex) surface contour (dashed line) 12-C in order to support the carrier material.

According to one exemplary embodiment, the foam material of the carrier 12 can be designed to receive a cleaning fluid, the delivery of the cleaning fluid (i.e. a liquid or gel) being adjustable during use based on the porosity of the foam material and the viscosity of the cleaning fluid. According to an exemplary embodiment, the abrasive functional particles 16 can also have a (further) thermoplastic material, the thermoplastic material of the abrasive functional particles 16 being harder than the thermoplastic binder 18.

According to an exemplary embodiment, the abrasive surface covering 14 can have an additional material in the form of nano- or micro-particles with an antibacterial and / or antiviral effect. The antibacterial and / or antiviral nano- or micro-particles can be applied in the thermoplastic binder 18 and / or an additional antibacterial and / or antiviral layer 14 - 1 on the abrasive surface covering 14.

FIGS. 6a-b now show a schematic side view and sectional view of an abrasive dental product 50 in the form of a dental cleaning product or toothbrush head 52 according to a further exemplary embodiment.

According to one embodiment, the toothbrush head 52 can have both the cleaning sanding pad 10 and also cleaning bristles 54, which can be arranged laterally adjacent to the cleaning sanding pad 10 or laterally enclosing the cleaning sanding pad 10. The cleaning pad 10 can again be arranged to be replaceable or permanently connected to the support structure 12-1. For example, in Figure 6a, the cleaning abrasive pad has a planar abrasive surface 14-A. In Figure 6b, for example, the cleaning abrasive pad has an outwardly curved (convex) abrasive surface 14-B. According to the exemplary embodiment of the abrasive dental product 50 shown in FIGS. 5a-b and 6a-b, a dental cleaning product in the form of a toothbrush head 52 was described by way of example, some technical effects of the different configurations being described below. According to one exemplary embodiment, the toothbrush head 52 only has the cleaning wheel (cleaning or polishing pad) 10, wherein the toothbrush head 52 can furthermore optionally have bristles 54 which are arranged laterally to the cleaning pad 10. The cleaning pad 14 thus has the cleaning and smoothing function for the teeth, while the optional bristles can also be used to clean the interdental spaces.

The additional antibacterial and / or antiviral material 14-1 in the form of the nano and / or microparticles can, for example, comprise Ag, Cu, Zn particles or alloys thereof and be embedded in the thermoplastic binder 18 or arranged on it.

For example, diamonds (industrial diamonds) can be used as abrasive functional particles 16, with the grain sizes (average diameter d1) being able to be designed differently depending on the planned use of the dental cleaning product.

If the dental cleaning product 50 is designed for daily use, the grain size can be in a range from 0.5 to 5.0 μm, from 2 to 4 μm or around 3 μm ± 0.5 μm. If the dental cleaning product is to be used weekly, the grain size d1 can be in a range of 5 to 15 μm, 7 to 11 μm or 9 μm ± 1 μm. For example, if the dental cleaning product 50 is to be used monthly for cleaning teeth, the average grain size d1 can be 15 to 25 μm, 17 to 23 μm or 20 ± 2 μm.

The coated abrasive tool or cleaning pad 10 has, for example, a foam material (sponge) as the carrier material of the carrier 12, which is for example wise open-pored. Such a foam material of the cleaning pad 10 is particularly suitable for the absorption of very low-viscosity fluids, eg liquid or gel-like cleaning additives (toothpaste), and for the metered delivery or release of the same after the foam material has absorbed the fluid or has been soaked with it. A lower viscosity of the gel (compared to a conventional toothpaste) generally leads to better distribution during application. Because it is designed as a foam pad, the abrasive tool 10 can absorb any gels or liquids that can also contain fragrances, essential oils, fluorides, medicaments and / or anti-inflammatory additives.

The mean porosity of the carrier material of the carrier 12, i. H. the foam material, the delivery or dosage of the cleaning additive can be controlled, d. H. during the cleaning process for a relatively long period of time, e.g. B. be made available relatively evenly during the entire brushing process. The cleaning pad 10 thus has a double effect or double use, in that the abrasive surface covering 14 leads to a cleaning of the surfaces of the teeth, while the foam material can provide for fluid application. In particular, essentially liquid additional cleaning agents can be used, which, for example, can be hygienically taken up by a fluid dispenser essentially without contact.

As has also been explained above, the support structure 12-1 can be provided to mechanically fix the carrier 12 of the cleaning pad 10, the cleaning pad 10 being able to surround the support structure 12-1 in regions or also in a cap shape, around the flat or outwardly curved (Convex) grinding surface 14-1, 14-2 of the cleaning pad 10 to provide. The resulting hardness of the cleaning pad 10 can be adjusted by the thickness of the foam material (= carrier material 12) of the carrier 12 adjacent to the support structure 12-1, that is, the greater the thickness of the foam material adjacent to the support structure 12-1 in the area of the cleaning or cleaning area. Abrasive surface 14-1, 14-2, the softer the cleaning pad 10 is (assuming a constant foam material). Furthermore, the support structure 12 - 1 is also effective as a mechanical (fixed or detachable) holder for the cleaning pad 10. Based on the resulting hardness and the resulting deformation of the cleaning pad 10 when it is pressed against the object to be cleaned, e.g. B. the teeth, can with a small deformation, a higher cleaning effect can be obtained due to an optimal power transmission of the abrasive surface covering 14 to the object to be cleaned. Furthermore, the cleaning pad 10 can be designed to be exchangeable, that is to say can be plugged onto the support structure 12-1, or can also be designed to be mechanically fixed to the support structure, for example as a disposable item.

The relatively thin design of the foam material of the cleaning pad 10, e.g. B. in a range from 1 to 3 mm, or from 1.5 to 2.5 or from 2 ± 0.2 mm leads to the fact that after using the cleaning pad 10, the drying process runs relatively quickly and hygienically, compared to a Cleaning pad with a solid foam material (full body). Since the support structure 12-1 can also be made air-permeable in order to protect the carrier material of the carrier 12 on both sides for drying or hygiene treatment, e.g. with a disinfectant.

In addition, many thermoplastic materials are approved for medical applications, oral hygiene, etc. The abrasive dental product 50 can also be used as a polishing and / or grinding tool for dental technical reworking processes in a CNC milling machine (CMC = Computerized Numerical Control).

A summary of exemplary embodiments of the coated abrasive tool 10, the method 300 for producing the same and the abrasive dental product is shown below.

According to one aspect, a coated abrasive tool has the following features: a carrier, which has a carrier material, and an abrasive surface covering on a surface area of the carrier, wherein the abrasive surface covering abrasive functional particles and a thermoplastic binder for an adhesive bond between at least some of the abrasive Functional particles and the carrier material, wherein at least some of the abrasive functional particles on the surface area of the carrier are at least partially embedded in the carrier material and connected to the carrier material, and at least some of the abrasive functional particles on the surface area of the carrier are also embedded in the thermoplastic binder is embedded, wherein the thermoplastic binder is connected to the abrasive functional particles and the carrier material in a material and / or form-fitting manner.

According to a further aspect, the abrasive functional particles have an average borrowed diameter d1, with at least some of the abrasive functional particles of the abrasive surface covering being embedded in an embedding depth d2 of the carrier material, with the embedding depth d2 at least 5% (or 10%) and at most 95 % of the average diameter d1 of the abrasive functional particles. According to a further aspect, at least 60% of the area of the abrasive surface covering is covered with a monolayer of the abrasive functional particles on the surface area of the carrier.

According to a further aspect, the average thickness d4 of the applied thermoplastic binder is smaller than the average diameter d1 of the abrasive functional particles and the abrasive functional particles protrude from the thermoplastic binder.

According to a further aspect, the surface area of the carrier is profiled and has knobs, a pyramid shape, a truncated pyramid shape, a cone shape, a truncated cone shape, groove structure, screw structure (^ spiral structure) or a wave shape in cross section. The abrasive functional particles are designed as a monolayer in combination with the thermoplastic binder. According to a further aspect, the carrier material has an open-pored surface area with an average pore diameter d3, the functional particles having an average diameter d1 with d1 s ¹ / i d3. The abrasive functional particles are designed as a monolayer in combination with the thermoplastic binder.

According to a further aspect, the carrier material comprises cork, textile, rubber, rubber, elastomer, PVC, PUR, paper, latex, PE, PA, PET, PC, SBR, PTHF, carbonate, a foam material, a film material and / or a bristle material Brush up. According to a further aspect, the abrasive functional particles are designed as hard particles and include corundum, zirconium corundum, silicon carbide, boron nitride, glass, minerals (Apatite), natural substances (sleeve shells) or diamond with a particle size between 100 nm and 2 mm.

According to a further aspect, the thermoplastic binder comprises PE, PA, PC, ABS, PVC, PET, PEEK, PTFE, PUR, PMMA or PTHF.

According to a further aspect, the coated abrasive tool is designed as a grinding tool, a polishing tool, a cleaning body or a brush. According to a further aspect, the abrasive effect of the abrasive tool is set via the distribution density of the functional particles on the surface area of the carrier.

According to a further aspect, the coated abrasive tool has an additional surface covering material on the existing abrasive surface covering, the surface covering material having a property as a dry lubricant.

According to one aspect, a method for producing a coated, abrasive tool has the following steps: Feeding a powder mixture to a thermal [DIN EN657] or low-thermal plasma spray device which is directed onto a surface area of a carrier to be coated, the powder mixture being abrasive functional particles and comprises a thermoplastic binder, the powder mixture having the functional particles and the thermoplastic binding material as separate powder particles, or the powder mixture having the functional particles at least partially or completely coated with the thermoplastic binder, and a reduction in the thermal or low-temperature plasma spray device the viscosity of the binder is brought about, and application of the functional particles with the binder, which has a reduced viscosity, to a surface area of the carrier, the thermoplastic B by resolidifying when applied to the surface area of the carrier and forming the abrasive surface covering on the carrier of the abrasive tool with the functional particles and the thermoplastic binder. According to a further aspect, when the abrasive functional particles are applied to the surface area of the carrier, at least one is also partially embedded Part of the abrasive functional particles caused in an embedment depth d2 of the carrier material of the carrier, the embedment depth d2 corresponding to at least 5% and at most 95% of an average diameter d1 of the abrasive functional particles, with 0.95 d1 z d2 z 0.05 d1.

According to a further aspect, the method also has the following step: setting the distribution density of the functional particles on the surface via the proportion of abrasive functional particles in the mixture of thermoplastic binder and functional particles that is fed to the plasma spray device. The abrasive functional particles are formed in combination with the thermoplastic binder as a monolayer.

According to a further aspect, the method also has the following step: setting the powder feed rate and the feed rate over the carrier surface, so that when the abrasive functional particles and the thermoplastic binder are applied, at least 60% of the area of the abrasive surface covering in combination with the thermoplastic binder as a monolayer the abrasive functional particle is formed on the surface area of the carrier. According to a further aspect, the carrier has an open-pored surface area with an average pore diameter d3, wherein the functional particles have an average diameter d1 with d1 s V * d3 in order to create an adhesive connection of the abrasive surface covering, which follows the topography of the open-pored surface area, as To effect monolayer on the open-pored carrier surface.

According to a further aspect, the carrier material includes cork, textile, rubber, rubber, elastomer, PVC, PUR, paper, latex, PE, PA, PET, PC, SBR, PTHF, carbonate, a foam material, a bristle material of a brush and / or a Foil material on.

According to a further aspect, the abrasive functional particles are designed as hard particles and have corundum, zirconium corundum, silicon carbide, boron nitride, glass, minerals (apatite), natural substances (sleeve shells) or diamond with a particle size between 100 nm and 2 mm, and the thermoplastic binder has PE, PA, PC, ABS, PVC, PET, PEEK, PTFE, PUR, PMMA or PTHF. According to a further aspect, the method also has the following step: applying an additional material as a surface covering material to the existing abrasive surface covering, the additional material being applied simultaneously with the thermoplastic binder or subsequently to the thermoplastic binder on the surface area of the carrier provided with the abrasive functional particles .

According to a further aspect, the thermoplastic binder and the abrasive functional particles are applied simultaneously to the surface area of the carrier.

According to a further aspect, an abrasive dental product has the coated abrasive tool.

According to one aspect, the carrier has a foam material as the carrier material, the abrasive surface covering being arranged on a surface region of the foam material.

According to one aspect, the foam material is open-pored and elastically deformable. According to one aspect, the carrier has a support structure on which the carrier material is arranged, wherein the carrier material is mechanically attached to the support structure and surrounds the support structure in regions or in a cap shape.

According to one aspect, the coated abrasive tool is designed as a cleaning sanding pad which has a flat sanding surface or an outwardly curved (convex) sanding surface.

According to one aspect, the foam material is designed to hold a cleaning fluid, the release of the cleaning fluid during use being adjustable based on the porosity of the foam material and the viscosity of the cleaning fluid.

According to one aspect, the abrasive dental product is a dental cleaning product, wherein the coated abrasive tool is arranged as a cleaning abrasive cushion or cleaning pad on the dental cleaning product. According to one aspect, the dental cleaning product is a toothbrush head of an electric or manual toothbrush, wherein the coated abrasive tool is arranged as a cleaning abrasive pad on the toothbrush head.

According to one aspect, the toothbrush head has the cleaning abrasive pad and furthermore cleaning bristles which are arranged laterally adjacent to the cleaning abrasive pad or laterally enclosing it.

According to one aspect, the cleaning pad is arranged to be replaceable or permanently connected to the support structure.

According to one aspect, the abrasive functional particles have a thermoplastic material.

According to one aspect, the thermoplastic material of the abrasive functional particles is harder than the thermoplastic binder.

According to one aspect, the abrasive surface covering has an additional material in the form of nano- or micro-particles with an antibacterial and / or antiviral effect.

According to one aspect, the dental cleaning product is designed as a dental polisher, as a dental drill attachment with a polishing and / or smoothing surface, or as a dental polishing pin.

Although some aspects of the present disclosure have been described as features in the context of an apparatus, it is clear that such a description can also be viewed as a description of corresponding method features. Although some aspects have been described as features in connection with a method, it is clear that such a description can also be viewed as a description of corresponding features of a device or the functionality of a device.

In the foregoing detailed description, various features have been grouped together in examples in order to streamline the disclosure. This kind of disclosure should not be interpreted as the intent that they are claimed Examples have more features than are expressly stated in each claim. Rather, as the following claims reflect, subject matter may lie in less than all of the features of a single disclosed example. Accordingly, the following claims are hereby incorporated into the Detailed Description, with each claim being allowed to stand as a separate example of its own. While each claim may stand as its own separate example, it should be noted that although dependent claims in the claims refer to a specific combination with one or more other claims, other examples also include a combination of dependent claims with the subject matter of any other dependent claim or a combination of each feature with other dependent or independent claims. Such combinations are intended to be included unless it is stated that a specific combination is not intended. Furthermore, it is intended that a combination of features of a claim is also included with any other independent claim, even if that claim is not directly dependent on the independent claim.

Although specific exemplary embodiments have been illustrated and described herein, it will be apparent to a person skilled in the art that a large number of alternative and / or equivalent implementations can be substituted for the specific exemplary embodiments shown and represented there without departing from the subject matter of the present application. This application text is intended to cover all adaptations and variations of the specific embodiments described and discussed herein. Therefore, the subject matter of the present application is limited only by the wording of the claims and the equivalent embodiments thereof.

Claims

1. Coated abrasive tool (10), having the following features: a carrier (12), which has a carrier material, and an abrasive surface covering (14) on a surface region (12-A) of the carrier (12), the abrasive surface covering ( 14) has abrasive functional particles (16) and a thermoplastic binding agent (18) for a firm bond between at least some of the abrasive functional particles (16) and the carrier material, at least some of the abrasive functional particles (16) on the surface area (12-A ) of the carrier (12) is partially embedded in the carrier material and connected to the carrier material, and wherein at least some of the abrasive functional particles (16) on the surface area (12-A) of the carrier (12) are also partially embedded in the thermoplastic binder (18) ) is embedded, wherein the thermoplastic binder (18) is connected to the abrasive functional particles (16) and the carrier material.

2. The coated abrasive tool according to claim 1, wherein the abrasive functional particles (16) have an average diameter d1, wherein at least some of the abrasive functional particles (16) of the abrasive surface covering (14) are embedded in an embedment depth d2 of the carrier material, the Embedment depth d2 corresponds to at least 5% and at most 95% of the average diameter d1 of the abrasive functional particles (16).

3. The coated abrasive tool (10) according to claim 1 or 2, wherein at least 60% of the area of the abrasive surface covering (14) is covered with a monolayer of the abrasive functional particles (16) on the surface area of the carrier (12).

4. The coated abrasive tool (10) according to one of the preceding claims, wherein the average thickness d4 of the applied thermoplastic see binder (18) is smaller than the average diameter d1 of the abrasive functional particles (16) and the abrasive functional particles protrude from the thermoplastic binder (18).

5. The coated abrasive tool (10) according to any one of the preceding claims, wherein the surface area (12-A) of the carrier (12) is profiled and has knobs, a pyramid shape, a truncated pyramid shape, a cone shape, a truncated cone shape, groove structure, spiral structure or in Cross-section has a wave shape, the abrasive functional particles (16) in combination with the thermoplastic binder (18) being designed as a monolayer.

6. The coated abrasive tool (10) according to one of the preceding claims, wherein the carrier material has an open-pored surface area with an average pore diameter d3, the functional particles (16) having an average diameter d1 with d1 s Vi d3, the abrasive functional particles ( 16) in combination with the thermoplastic binder (18) are designed as a monolayer.

7. The coated abrasive tool (10) according to one of the preceding claims, wherein the carrier material is cork, textile, rubber, rubber, elastomer, PVC, PUR, paper, latex, PE, PA, PET, PC, SBR, PTHF, carbonate, comprises a foam material, a bristle material of a brush and / or a film material.

8. The coated abrasive tool (10) according to one of the preceding claims, wherein the abrasive functional particles (16) are designed as hard particles and corundum, zirconium corundum, silicon carbide, boron nitride, glass, minerals, natural substances or diamond with a particle size between 100 nm and 2 mm.

9. The coated abrasive tool (10) according to any one of the preceding claims, wherein the thermoplastic binding agent (18) has PE, PA, PC, ABS, PVC, PET, PEEK, PTFE, PUR, PMMA or PTHF.

10. The coated abrasive tool (10) according to any one of the preceding claims, wherein the coated abrasive tool (10) is designed as a grinding tool, a polishing tool, a cleaning body or a brush.

11. The coated abrasive tool (10) according to one of the preceding claims, wherein the abrasive effect of the abrasive tool (10) via the distribution density and / or size of the abrasive functional particles (16) on the surface area (12-A) of the carrier (12 ) is set.

12. The coated abrasive tool (10) according to one of the preceding claims, further with the following feature: an additional surface covering material (18 ‘) on the existing abrasive surface covering (14), wherein the additional surface covering material (18‘) has a property as a dry lubricant.

13. A method (300) for producing a coated, abrasive tool (10), comprising the following steps:

Feeding (310) a powder mixture to a thermal or low-thermal plasma spray device, which is directed at a surface area of a carrier to be coated, the powder mixture having abrasive functional particles and a thermoplastic binder, the powder mixture having the functional particles and the thermoplastic binding material as separate powder particles , or

wherein the powder mixture has the functional particles at least partially or completely coated with the thermoplastic binder, and wherein the viscosity of the binder is reduced in the thermal or low-temperature plasma spray device, and Application (320) of the functional particles with the reduced viscosity binder on a surface area of the carrier, the thermoplastic binder solidifying again when applied to the surface area of the carrier and the abrasive surface covering on the carrier of the abrasive tool with the functional particles and the thermoplastic binder is formed.

14. The method according to claim 13, wherein when the abrasive functional particles are applied to the surface area of the carrier, at least a part of the abrasive functional particles is partially embedded in an embedment depth d2 of the carrier material of the carrier, the embedment depth d2 at least 5% and at most 95% of an average diameter di of the abrasive functional particles corresponds, with 0.95 d1 z d2 z 0.05 d1.

15. The method of claim 13 or 14, further comprising the step of:

Adjustment (330) of the distribution density of the functional particles on the surface via the proportion of abrasive functional particles in the mixture of thermoplastic binder and functional particles that is fed to the plasma spray device in order to create the abrasive functional particles (16) in combination with the thermoplastic binder (18) as a mono-layer.

16. The method according to any one of claims 13 to 15, further comprising the following step:

Setting (340) the powder feed rate and the feed rate over the carrier surface, so that when the abrasive functional particles and the thermoplastic binder are applied, at least 60% of the area of the abrasive surface covering is a monolayer of the abrasive functional particles in combination with the thermoplastic binder (18) the surface area of the carrier is formed.

17. The method according to any one of claims 13 to 16, wherein the carrier has an open-pored surface area with an average pore diameter d3, wherein the functional particles have an average diameter d1 with d1 s V6 d3 in order to create an adhesive connection of the abrasive surface surface, which follows the topography of the open-pored surface area, as a mono-layer on the open-pored support surface.

18. The method according to any one of claims 13 to 17, wherein the carrier material is cork, textile, rubber, rubber, elastomer, PVC, PUR, paper, latex, PE, PA, PET, PC, SBR, PTHF, carbonate, a foam material, comprises a bristle material of a brush and / or a film material.

19. The method according to any one of claims 13 to 18, wherein the abrasive functional particles are designed as hard particles and have corundum, zirconium corundum, silicon carbide, boron nitride, glass, minerals, natural substances or diamond with a particle size between 100 nm and 2 mm, and the thermoplastic binder comprising PE, PA, PC, ABS, PVC, PET, PEEK, PTFE, PUR, PMMA or PTHF.

20. The method according to any one of claims 13 to 19, wherein the thermoplastic binder (18) and the abrasive functional particles (16) are applied simultaneously to the surface area (12-A) of the carrier (12).

21. Abrasive dental product (50) which has the coated abrasive tool (10) according to one of the preceding claims 1 to 12.

22. Abrasive dental product (50) according to claim 21, wherein the carrier (12) has a foam material as the carrier material, the abrasive surface covering (14) being arranged on a surface region (12-A) of the foam material.

23. Abrasive dental product (50) according to claim 22, wherein the foam material is open-pored and elastically deformable.

24. Abrasive dental product (50) according to one of claims 21 to 23, wherein the carrier (12) has a support structure (12-1) on which the carrier material is arranged, the carrier material being mechanically fastened to the support structure (12-1) and surrounds the support structure (12-1) in areas or in a cap shape.

25. Abrasive dental product (50) according to one of claims 21 to 24, wherein the coated abrasive tool (10) is designed as a cleaning sanding pad which has a flat sanding surface or an outwardly curved (convex) sanding surface.

26. Abrasive dental product (50) according to one of claims 21 to 25, wherein the foam material is designed to receive a cleaning fluid, the release of the cleaning fluid during use being adjustable based on the porosity of the foam material and the viscosity of the cleaning fluid.

27. Abrasive dental product (50) according to one of claims 21 to 26, wherein the abrasive dental product (50) is a dental cleaning product, wherein the coated abrasive tool (10) is arranged as a cleaning abrasive pad on the dental cleaning product.

28. Abrasive dental product (50) according to claim 27, wherein the dental cleaning product is a toothbrush head of an electric or manual toothbrush, wherein the coated abrasive tool (10) is arranged as a cleaning abrasive pad on the toothbrush head.

29. The dental cleaning product (50) according to claim 28, wherein the toothbrush head has the cleaning abrasive pad and further cleaning bristles which are arranged laterally adjacent to or laterally enclosing the cleaning abrasive pad.

30. Dental cleaning product (50) according to claim 28 or 29, wherein the cleaning abrasive pad is arranged to be replaceable or permanently connected to the support structure.

31. Dental cleaning product (50) according to one of claims 21 to 30, wherein the abrasive functional particles (16) have a thermoplastic material.

32. Dental cleaning product (50) according to claim 31, wherein the thermoplastic material of the abrasive functional particles (16) is harder than the thermoplastic binder (18).

33. Dental cleaning product (50) according to one of claims 21 to 32, wherein the abrasive surface covering (14) has an additional material in the form of nano- or micro-particles with an antibacterial and / or antiviral effect.

34. Dental cleaning product (50) according to one of claims 21 to 33, wherein the dental cleaning product (50) is designed as a dental polisher, as a dental drill attachment with a polishing and / or smoothing surface, or as a dental polishing pin.