• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a rotatable grinding instrument (1) with an instrument head (3) and with a shank (5). An embedding layer (7) and grinding bodies (9) embedded in the embedding layer (7) are arranged on a base body of the instrument head (3). The embedding layer (7) or an armor layer (17) covering the embedding layer (7) is coated with an oxide-ceramic or ceramic-organic coating (15), the coating (15) being a sol-gel layer.
    公开号:CH709829B1
    申请号:CH00925/15
    申请日:2015-06-26
    公开日:2019-07-15
    发明作者:Busch Gert；Fuhrmann Manfred
    申请人:Busch & Co Gmbh & Co Kg；
    IPC主号:
    专利说明:

    Description: The present invention relates to a rotatable grinding instrument having an instrument head and a shank, wherein an embedding layer and abrasive particles embedded in the embedding layer are arranged on the instrument head. The present invention further relates to a method for producing such a grinding instrument.
    Such grinding instruments are known for example as so-called diamond grinder, in which the grinding bodies are introduced in the form of small diamond grains in, for example, a nickel layer. Such grinding instruments can be used, for example, as dental instruments, as instruments for hand and foot care or as a fine tool for metalworking, for example in the goldsmith's trade.
    In particular, when used on the human body, it can cause problems for people who are sensitive to nickel, when the abrasive particles are worn or broken out of the embedding layer and thus creates a direct contact between the human body and the nickel layer.
    Furthermore, in such known grinding instruments often there is the problem that optically not visible to the user when there is a heavy wear of the grinding instrument.
    Finally, especially in the application of such grinding instruments as dental instruments, the problem of reliable cleaning after use. In known devices, it is often difficult to bring about a completely residue-free cleaning, as in the spaces between the diamond bodies infection-causing germs can stick.
    It is therefore the object of the present invention to develop a rotatable grinding instrument of the type mentioned, in which reduces the problem of allergic reactions and further improved cleanability is given. Furthermore, the new abrasive instrument should preferably facilitate the detection of a wear condition. It is a further object of the present invention to provide a method of making a grinding instrument.
    The invention is defined by the features of claims 1 and 10.
    In the inventive rotatable grinding instrument with an instrument head and with a shaft, wherein an embedding layer and embedded in the embedding layer abrasive bodies are arranged on a base body of the instrument head, it is provided that the embedding layer or the embedding layer covering armor layer with at least one oxide ceramic or ceramic-organic coating is coated. The coating is a sol-gel layer.
    Such a coating covers the embedding layer or the armor layer, so that a contact of the embedding layer or the armor layer can be avoided with persons and thus the risk of reactions of persons to materials of the embedding layer can be avoided.
    Furthermore, an oxide ceramic or ceramic-organic coating has an advantageous surface to be cleaned, so that the cleaning ability of such a rotatable grinding instrument is improved. The inventive oxide ceramic or ceramic-organic coating also has a very high hardness, so that an additional holding function of the grinding wheels on the instrument head is achieved by the coating, so that the durability of the inventive grinding instruments is improved.
    In the embodiment of the invention in which the embedding layer is covered with an armor layer, the armor layer has a greater hardness than the embedding layer and serves for additional stabilization of the abrasive particles in the embedding layer and the protection of the embedding layer.
    According to the invention it is further provided that the coating is a sol-gel layer. Such a layer has been found to be particularly advantageous because it can be prepared in an advantageous manner via the sol-gel process. As a result, the coating according to the invention can be applied in a simple manner to the embedding layer. Sol-gel layer is understood as meaning an inorganic or hybrid-polymeric layer produced by the sol-gel process. Such sol-gel layers are also homogeneous, nanocrystalline layers or organic-inorganic hybrid layers. The invention thus provides that the coating according to the invention can be obtained by the sol-gel process.
    The shaft may for example consist of a metallic material.
    It is preferably provided that the embedding layer and / or the armor layer are applied chemically or galvanically. The embedding layer and / or the armor layer may be a nickel layer. Such an embedding layer or the combination of embedding layer and armor layer has proven to be particularly advantageous for fixing the abrasive body.
    Under the nickel layer is understood according to the embodiment, a layer containing nickel. Of course, this layer may also comprise an alloy of nickel and other metals.
    The abrasive particles may be, for example, diamond or corundum or other particles or a mixture of these. Such abrasive bodies are particularly advantageous due to their particularly high hardness and have an advantageous wear behavior.
    In a particularly preferred embodiment of the invention it is provided that the coating has a layer thickness between 0.2 pm and 30 pm, preferably 0.2 pm to 10 pm.
    In a particularly preferred embodiment of the invention it is provided that the coating has a different color of the embedding layer or armor layer. Under different color in the context of the invention, a color difference is understood, which is perceptible to the human eye.
    It can thereby be achieved that the user can recognize when using the inventive grinding instrument when at least portions of the grinding instrument are worn, since at this the inventive coating is removed by abrasion or the chemical, thermal or mechanical stress during the cleaning process and thus, due to the difference in color, the underlying embedding layer or armor layer is recognizable. This ensures that a worn at least in some areas instrument can be replaced in good time, before people get direct contact with the example embedded nickel embedding layer or armor layer. In special embodiments of the armor layer these are designed shiny, so that wear is particularly evident, since the surrounding coating usually has a dull and different-colored surface.
    In one embodiment of the invention, it is provided that the coating has a first and a second layer of oxide ceramic or ceramic-organic material, wherein the first layer is applied to the embedding layer or the armor layer covering the embedding layer.
    This ensures that when a wear of the instrument head, in which the second, outer layer of the coating is partially removed, the first layer, which covers the embedding layer or the armor layer, remains present. As a result, contact of persons with the embedding layer or the armor layer, which may for example contain nickel, can be avoided, as these are still covered by the first layer.
    It can be provided that the first layer has a different color from the second layer. This allows the coating to be used as a wear indicator, as the user may be discerned due to the color difference of the first layer to the second layer when areas of the instrument head are worn, so that the second layer is abraded and the first layer becomes visible to the user.
    It is preferably provided that a fixing layer between the embedding layer and a base body of the instrument head is arranged. By means of the fixing layer, the grinding bodies can be prefixed to the basic body of the instrument head during the production of the instrument head, before the embedding layer is subsequently applied for the final fastening.
    The invention further provides a method for producing an abrasive instrument, a previously described abrasive instrument, comprising the following steps: applying an embedding layer to a base body of the instrument head and embedding abrasive bodies in the embedding layer, providing a sol, applying the sol on the embedding layer of the instrument head, - converting the sol into a gel, - drying the gel to an oxide ceramic or ceramic-organic coating.
    By means of such a method, a rotatable grinding instrument according to the invention can be produced in a particularly advantageous manner. In the method can be provided that the embedding layer is covered with an armor layer. The sol is thus applied either to the embedding layer or to the armor layer covering the embedding layer.
    It is preferably provided that the orders of the sol via a wet-chemical coating method, preferably via dip-coating, spin coating or spray coating occurs. The application of the embedding layer and / or the armor layer can be done chemically or galvanically.
    The abrasive particles can be fixed to the instrument head by means of a fixing layer and then the embedding layer is applied. The orders of the fixing layer can be done, for example, chemically or galvanically. Alternatively, there is the possibility that the abrasive particles are applied together with the embedding layer.
    The sol can be prepared based on metal alkoxide and / or organically modified silane. The Metallal koholat and / or the silane can be used individually or in admixture with other metal alcoholates or organically modified silanes.
    The inventive grinding instrument is particularly suitable for use in the dental field or in the skin and / or hand or pedicure area. However, use in other areas, for example in the precision machining of metals, is also possible.
    In the following the invention will be explained in more detail with reference to the following figures. It shows:
    1 is a schematic representation of a rotatable grinding instrument according to the invention,
    2 is a schematic partial sectional view of the instrument head of a first embodiment of the invention,
    Fig. 3 is a schematic partial sectional view of an instrument head according to a second embodiment of the present invention and
    Fig. 4 is a schematic partial sectional view of an instrument head of a third embodiment of the present invention.
    In Fig. 1, a rotatable grinding tool 1 according to the invention is shown schematically. The grinding instrument has an instrument head 3 and a shaft 5. The shaft 5 may for example consist of metallic material.
    As is apparent from FIGS. 2 to 4, in which different embodiments of the present invention are shown, the instrument head 3 has an embedding layer 7 with embedded in the embedding layer 7 grinding bodies 9. The grinding wheels 9 may be, for example, diamond grains.
    A metal base body 11 of the instrument head 3 is coated with a fixing layer 13. This fixing layer 13, which may be applied, for example, chemically or galvanically, is used in the manufacture of the instrument head 3 to a prefixing of the abrasive body 9. Subsequently, the embedding layer 7 is applied.
    In the embodiment shown in Fig. 2, the embedding layer 7 is coated with a coating 15 made of an oxide ceramic or ceramic-organic material. This coating 15 is preferably a sol-gel layer. This layer has the advantage that the embedding layer 7, which may contain nickel, for example, is covered by the coating 15, so that a direct contact of a person with the nickel in the use of the grinding tool 1 can be prevented. If the abrasive instrument according to the invention is used, for example, in the dental field or in skin care or hand and foot care, it is thus prevented that persons reacting sensitively to materials of the embedding layer receive direct contact with this layer.
    As is apparent from Fig. 2, this coating 15 is first applied to the grinding wheels 9. When using the instrument, however, the areas of the coating 15 covering the grinding bodies 9 are abraded very quickly, so that 9 free surfaces for grinding are produced on the grinding bodies.
    The coating 15 may have a layer thickness between 0.2 .mu.m and 30 .mu.m, preferably 0.2 .mu.m to 10 .mu.m.
    In the embodiment shown in FIG. 3, an armor layer 17 is provided between the embedding layer 7 and the coating 15. The armor layer 17 ensures a higher stability of the embedding of the grinding wheels 9 and the protection of the embedding layer. In the embodiment shown in Fig. 3, the coating 15 covers the armor layer 17, which may also contain nickel, so that contact of persons with the armor layer 17 can be avoided.
    In the exemplary embodiment illustrated in FIG. 2 or FIG. 3, it is preferably provided that the coating 15 has a different color than the embedding layer 7 or the armor layer 17. As a result, the user can recognize when, due to wear, areas of the coating 15 have been removed, so that the underlying armor layer 17 or embedding layer 7 becomes visible. This gives the user a wear indicator so that the user can exchange the grinding tool 1 in a timely manner.
    The embodiment shown in Fig. 4 corresponds substantially to the embodiment shown in Fig. 3. The difference is that the coating 15 has a first layer 15a and a second layer 15b of oxide ceramic or ceramic-organic material. It is thereby achieved that during the grinding of the second layer 15b, which is external, the embedding layer 7 and the armor layer 17 continue to be covered by the first layer 15a. It is particularly advantageous if the first layer 15a has a different color from the second layer 15b, so that the removal of the second layer 15b is optically recognizable to the user.
    The inventive coating 15 has the particular advantage that in addition to covering the embedding layer 7 or armor layer 17 containing, for example, nickel, an additional stability of embedding of the grinding bodies 9 is provided due to the great hardness. Furthermore, the coating 15 has a surface which is advantageous for cleaning, so that the risk of residues on the surfaces between the abrasive bodies is reduced after cleaning.
    权利要求:
    Claims (14)
    [1]
    claims
    1. Rotatable grinding instrument (1) with an instrument head (3) and with a shank (5), wherein an embedding layer (7) and embedded in the embedding layer (7) abrasive bodies (9) are arranged on a base body of the instrument head (3), characterized in that the embedding layer (7) or an armor layer (17) covering the embedding layer (7) is coated with an oxide-ceramic or ceramic-organic coating (15), the coating (15) being a sol-gel layer.
    [2]
    2. Grinding instrument according to claim 1, characterized in that the embedding layer and / or the armor layer (17) is applied chemically, in particular galvanically.
    [3]
    3. Grinding instrument according to claim 1 or 2, characterized in that the embedding layer (7) and / or the armor layer (17) is a nickel layer.
    [4]
    4. Grinding instrument according to one of claims 1 to 3, characterized in that the grinding bodies (9) are diamond or corundum particles or a mixture of these.
    [5]
    5. Grinding instrument according to one of claims 1 to 4, characterized in that the coating (15) has a layer thickness between 0.2 pm and 30 pm, preferably between 0.2 pm and 10 pm.
    [6]
    6. Abrasive instrument according to one of claims 1 to 5, characterized in that the coating (15) has one of the embedding layer (7) or the armor layer (17) for detecting wear different color.
    [7]
    7. Abrasive instrument according to one of claims 1 to 6, characterized in that the coating (15) has a first and a second layer (15a, 15b) of oxide ceramic or ceramic-organic material, wherein the first layer (15a) on the embedding layer (7) or on a, the embedding layer (7) covering armor layer (17) is applied.
    [8]
    8. Abrasive instrument according to claim 7, characterized in that the first layer (15a) for wear detection one of the second layer (15b) has different color.
    [9]
    9. Grinding instrument according to one of claims 1 to 8, characterized in that a fixing layer (13) between the embedding layer (7) and the base body of the instrument head (3) is arranged.
    [10]
    10. A method of manufacturing a grinding instrument according to claim 1, comprising the following steps: applying an embedding layer on a base body of the instrument head and embedding abrasive bodies in the embedding layer; - providing a sol, - applying the sol to the embedding layer (7) of the instrument head (3), - converting the sol into a gel, drying the gel to form an oxide ceramic or ceramic organic coating (15).
    [11]
    11. The method according to claim 10, characterized in that the orders of the sol via a wet-chemical coating method, preferably via dip coating, spray coating or spin coating occurs.
    [12]
    12. The method according to claim 10 or 11, characterized in that the application of the embedding layer (7) chemically, in particular galvanically takes place.
    [13]
    13. The method according to any one of claims 10 to 12, characterized in that the grinding bodies (9) are applied together with the embedding layer (7) or that the grinding body (9) on the main body of the instrument head (3) by means of a fixing layer (13). are fixed and then the embedding layer (7) is applied.
    [14]
    14. The method according to any one of claims 10 to 13, characterized in that the sol is prepared on the basis of metal alkoxide and / or organically modified silane.
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    同族专利:
    公开号 | 公开日
    DE102014212448A1|2015-12-31|
    DE102014212448B4|2016-09-22|
    CH709829A2|2015-12-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3533534A1|1985-09-20|1987-04-02|Blendax Werke Schneider Co|Dental grinding tool|
    DE19916336C2|1999-04-12|2001-03-01|Edenta Ag, Au|Rotating tool for machining workpieces|
    EP1826257A1|2006-02-24|2007-08-29|sia Abrasives Industries AG|Nano functional abrasive|
    DE102011114903A1|2011-10-05|2013-04-11|Gebr. Brasseler Gmbh & Co. Kg|dental tool|EP3266406B1|2016-07-04|2020-03-04|Coltène/Whaledent AG|Dental instrument|
    法律状态:
    2021-01-29| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014212448.4A|DE102014212448B4|2014-06-27|2014-06-27|Rotary dental grinding instrument or rotary grinding instrument for hand and foot care and method for its production|
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