Elastic abrasive tool and method for manufacturing the same

Abstract

The present invention provides an elastic abrasive tool and a manufacturing method thereof. The elastic abrasive tool comprises a base and a grinding layer fixed on the base, the grinding layer comprises a plurality of grinding blocks extending away from the base, the grinding blocks have grinding surfaces facing away from the base, and the plurality of grinding surfaces are located on the same plane or cylindrical surface; the grinding block comprises a front portion and a rear portion, and in the extending direction of the grinding block, the rear portion is away from the working surface relative to the front portion, and the raw material of the rear portion has a pore-forming agent. The manufacturing method comprises a mixing step, mixing the first raw material evenly, and mixing the second raw material evenly, the second raw material comprises the first raw material and the pore-forming agent; and a hot pressing step, putting the first raw material and the second raw material into a mold in turn and hot pressing them into a blank. The elastic abrasive tool provided by the present invention guarantees grinding performance and wear resistance in the early stage of use, and can also ensure that the sharpness of the elastic abrasive tool does not decay in the later stage of use, thereby ensuring grinding performance while extending the service life of the elastic abrasive tool.

Description

Technical Field

[0001] The invention relates to a surface polishing grinding tool, in particular to an elastic grinding tool made of diamond resin material and a manufacturing method of the elastic grinding tool. Background Art

[0002] The existing elastic abrasive tool is a diamond resin elastic abrasive tool, which is used for polishing the surface of ceramics, granite, marble and antique tiles. The existing elastic abrasive tool includes a base and a grinding layer. The base is used to be installed on the grinding head of the grinding machine. The grinding layer is formed by a mixed material of diamond and resin, and a plurality of grinding blocks extending away from the base are formed thereon, and each grinding block has a grinding surface facing away from the base.

[0003] The existing problem with this type of elastic abrasive is that after repeated use, the grinding block will be consumed, the air gap on the grinding surface will be blocked by grinding chips, the heat dissipation capacity will deteriorate, and other problems will cause the sharpness of the grinding block surface to gradually decay and the grinding performance to decline. Summary of the invention

[0004] The first object of the present invention is to provide an elastic abrasive tool which ensures that the sharpness does not decay.

[0005] A second object of the present invention is to provide a method for manufacturing an elastic abrasive tool that ensures that the sharpness does not decay.

[0006] The first object of the present invention provides an elastic grinding tool comprising a base and a grinding layer fixed on the base, the grinding layer comprising a plurality of grinding blocks extending back to the base, the grinding blocks having grinding surfaces facing back to the base, and the plurality of grinding surfaces are located on the same plane or cylindrical surface; the grinding block comprises a front portion and a rear portion, and in the extending direction of the grinding block, the rear portion is farther away from the grinding surface than the front portion; the front portion is made of a first raw material, and the rear portion is made of a second raw material; the second raw material comprises the first raw material and a pore-forming agent.

[0007] It can be seen from the above scheme that since the raw material at the rear has a pore-forming agent, when the grinding block is consumed to expose the rear, during polishing and grinding, the pore-forming agent in the rear grinding surface dissolves rapidly in water to distribute pores on the grinding surface. The pores have the effects of accommodating chips, removing chips, storing coolant, enhancing heat dissipation, and reducing blockage, thereby ensuring the grinding performance of the elastic abrasive tool. In addition, the front of the grinding block does not form a porous surface, which can improve the wear resistance of the front. Therefore, the elastic abrasive tool provided by the present invention guarantees the grinding performance and wear resistance in the early stage of use, and can also ensure that the sharpness of the elastic abrasive tool does not decay in the later stage of use, thereby ensuring the grinding performance while extending the service life of the elastic abrasive tool.

[0008] A further solution is that the first raw material includes diamond powder, white corundum powder, phenolic resin powder, zinc oxide powder, calcium carbonate powder, chromium oxide powder, magnesium oxide powder, silicon oxide powder and zinc stearate powder.

[0009] A further solution is that, by weight, the first raw material includes 5 to 12 parts of diamond powder, 5 to 12 parts of white corundum powder, 38 to 48 parts of phenolic resin powder, 12 to 25 parts of zinc oxide powder, 3 to 10 parts of calcium carbonate powder, 0.5 to 1.5 parts of chromium oxide powder, 1 to 6 parts of magnesium oxide powder, 1 to 6 parts of silicon oxide powder and 0.5 to 1.5 parts of zinc stearate powder; the second raw material includes 3 to 10 parts of pore-forming agent.

[0010] A further solution is that, by weight, the first raw material includes 5 to 7 parts of diamond powder, 7 to 9 parts of white corundum powder, 38 to 40 parts of phenolic resin powder, 20 to 25 parts of zinc oxide powder, 6 to 8 parts of calcium carbonate powder, 0.5 to 1 part of chromium oxide powder, 2 to 3 parts of magnesium oxide powder, 2 to 4 parts of silicon oxide powder and 0.5 to 1 part of zinc stearate powder; the second raw material includes 10 parts of pore-forming agent.

[0011] As can be seen from the above, the use of this component ratio can effectively ensure the grinding sharpness, further improve the brightness of the product surface during rear polishing, and improve the processing quality.

[0012] In a further embodiment, the pore-forming agent is sodium sulfate, sodium carbonate, sodium bicarbonate or sodium chloride.

[0013] A further solution is that, in the extension direction of the grinding block, the height of the rear portion is greater than or equal to the height of the front portion.

[0014] It can be seen from the above that when the grinding block is consumed to half of its height, the sharpness of the grinding surface begins to decrease. Here, the grinding surface changes to a porous structure, which can further extend the service life of the elastic abrasive tool while ensuring the grinding performance.

[0015] A further solution is that, in the extension direction of the grinding block, the cross-sectional area of ​​the grinding block gradually decreases from the extension start end to the grinding surface.

[0016] A further solution is that the grinding block is in the shape of a prism.

[0017] It can be seen from the above that this setting makes the grinding block have better mechanical properties and stronger stability when subjected to various external loads.

[0018] A further solution is that the elastic grinding tool further includes an elastic layer, the elastic layer is made of elastic material, and the elastic layer is located between the base and the grinding layer.

[0019] As can be seen from the above, the setting of the elastic layer provides a certain vibration buffering effect when the elastic abrasive tool is working, thereby effectively protecting the polishing material.

[0020] A further solution is that the grinding layer has an attachment wall attached to the surface of the elastic layer, and the plurality of grinding blocks are connected to the attachment wall.

[0021] As can be seen from the above, in this arrangement, a plurality of grinding blocks are formed on the grinding layer, and at the same time, the attachment wall provides mutual support force between the plurality of grinding blocks, thereby improving the mechanical properties of the elastic mold.

[0022] The second object of the present invention provides a method for manufacturing an elastic abrasive tool for manufacturing the above-mentioned elastic abrasive tool; the manufacturing method comprises a mixing step, mixing the first raw material evenly, and mixing the second raw material evenly, the second raw material comprising the first raw material and a pore-forming agent; a hot pressing step, placing the first raw material and the second raw material into a mold in sequence and hot pressing them into a green block.

[0023] As can be seen from the above scheme, when manufacturing an elastic abrasive tool, a pore-forming agent is mixed into the original first raw material to make a second raw material, the first raw material and the second raw material are mixed evenly respectively, and then the first raw material and the second raw material are sequentially put into a mold, and then a secondary curing step and a cooling step are sequentially performed to complete the preparation of a blank of a grinding layer. This method quickly and effectively completes the manufacture of an elastic abrasive tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the first embodiment of the elastic abrasive tool of the present invention from a first viewing angle.

[0025] Figure 2 Schematic diagram of the structure of the first embodiment of the elastic abrasive tool of the present invention from a second viewing angle.

[0026] Figure 3 FIG. 4 is a schematic structural diagram of the first embodiment of the elastic abrasive tool of the present invention from a third viewing angle.

[0027] Figure 4 It is a schematic structural diagram of the first embodiment of the elastic abrasive tool of the present invention after the front part of the grinding block is consumed.

[0028] Figure 5 FIG. 4 is a schematic structural diagram of a second embodiment of an elastic abrasive tool according to the present invention. DETAILED DESCRIPTION

[0029] First embodiment of elastic abrasive tool

[0030] See also Figures 1 to 3 , Figures 1 to 3 The schematic diagrams are respectively the first perspective, the second perspective and the third perspective of the first embodiment of the elastic abrasive tool of the present invention. The elastic abrasive tool comprises a base 1, an elastic layer 2 and a grinding layer 3 connected in sequence, the base 1 is made of plastic material, the base 1 has a dovetail-shaped clamping portion 11 for clamping to the head of the grinder, and the elastic layer 2 is fixedly bonded to the base 1 by glue.

[0031] The model layer 3 includes 30 grinding blocks 31 arranged in a rectangular array, and the 30 grinding blocks 31 are divided into 3 columns, each column includes 10 grinding blocks 31. The grinding blocks 31 extend from the elastic layer 2, and in the extending direction of the grinding blocks, the cross-sectional area of ​​the grinding blocks gradually decreases from the extension start end to the grinding surface and is prism-shaped; in the height direction of the grinding blocks 31, the grinding blocks 31 have a front portion 311 and a rear portion 312 connected in sequence; the elastic layer 2 is made of elastic material, and the grinding layer 3 is bonded to the surface side of the elastic layer 2 by glue, and the front portion 311 and the rear portion 312 are both exposed outside the elastic layer 2, and the front portion 311 is away from the elastic layer 2 relative to the rear portion 312. The extension end of the front portion 311 facing away from the elastic layer 2 has a grinding surface 301, and multiple grinding surfaces 301 are located on the same cylindrical surface. The grinding layer 3 further has an attachment wall 32 attached to the surface of the elastic layer 2 , and the 30 grinding blocks 31 are all connected to the attachment wall 32 .

[0032] The front part 311 is made of a first raw material, which is composed of diamond powder, white corundum powder, phenolic resin powder, zinc oxide powder, calcium carbonate powder, chromium oxide powder, magnesium oxide powder, silicon oxide powder and zinc stearate powder; the rear part 312 is made of a second raw material, which includes the first raw material and a pore-forming agent, and the pore-forming agent is an inorganic salt that is easily soluble in water and easily dissolved. The pore-forming agent is selected from sodium sulfate, sodium carbonate, sodium bicarbonate or sodium chloride, and the particle size of the pore-forming agent is 100 mesh. Since the second raw material contains a pore-forming agent, the rear part 312 has pore-forming agent particles distributed everywhere, and the pore-forming agent particles dissolve in water. Therefore, it can be understood that the grinding surface of the rear part 312 is a porous structure surface that is synchronously activated and formed during grinding. In the extension direction of the grinding block 31, the height of the rear part 312 is equal to the height of the front part 311.

[0033] The manufacturing method of the elastic abrasive tool provided by the present invention includes the step of preparing the blank of the grinding layer, which includes a mixing step and a hot pressing step. According to the components and the content of the components of the front part 311 and the components of the rear part 312 in Table 1 below, the mixing step is performed to evenly mix the first raw material and evenly mix the second raw material, and the hot pressing step is to sequentially mold the first raw material and the second raw material and hot press them into a blank of the grinding layer 3. The blank is sequentially cured, cooled and trimmed to obtain the grinding layer 3. In the photometric test, the photometric surface of the polished product achieved by each embodiment of the grinding layer 3 in the initial polishing use and the later polishing use exceeds the photometric requirement.

[0034] Table 1 Components, contents and photometric test results of various embodiments of the grinding layer

[0035]

[0036] Combination Figure 4 , Figure 4This is a schematic diagram of the structure of the first embodiment of the elastic abrasive tool of the present invention after the front part of the grinding block is consumed. Since the raw material of the rear part 312 contains a pore-forming agent, when the grinding block 31 is consumed to expose the rear part 312, during polishing and grinding, the pore-forming agent in the grinding surface 302 of the rear part 312 reacts with water and dissolves to distribute pores on the grinding surface 302. The pores have the effects of accommodating chips, removing chips, storing coolant, enhancing heat dissipation, and reducing blockage, thereby ensuring the grinding performance of the elastic abrasive tool. When the pore-forming agent is not added during the molding of the front part 311, the wear resistance of the grinding block 31 in the early stage of use can be improved. Therefore, the elastic abrasive tool provided by the present invention guarantees the grinding performance and wear resistance in the early stage of use, and can also ensure that the sharpness of the elastic abrasive tool does not decay in the later stage of use, thereby ensuring the grinding performance while extending the service life of the elastic abrasive tool.

[0037] Second embodiment of elastic abrasive tool

[0038] See also Figure 5 , Figure 5 Schematic diagram of the structure of the second embodiment of the elastic grinding tool of the present invention. In this embodiment, in the extension direction of the grinding block 41, the height of the rear portion 412 is greater than the height of the front portion 411; the grinding surfaces 401 of the plurality of grinding blocks 41 are located on the same plane.

[0039] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An elastic grinding tool, comprising a base and a grinding layer fixed on the base, wherein the grinding layer comprises a plurality of grinding blocks extending away from the base, wherein the grinding blocks have a grinding surface away from the base, and the plurality of grinding surfaces are located on the same plane or cylindrical surface; Features: The grinding block comprises a front portion and a rear portion, wherein in the extension direction of the grinding block, the rear portion is away from the grinding surface relative to the front portion; The front part is made of a first raw material, and the rear part is made of a second raw material; The second raw material includes the first raw material and a pore former; The first raw material includes diamond powder, white corundum powder, phenolic resin powder, zinc oxide powder, calcium carbonate powder, chromium oxide powder, magnesium oxide powder, silicon oxide powder and zinc stearate powder; In parts by weight, the first raw material includes 5 to 12 parts of diamond powder, 5 to 12 parts of white corundum powder, 38 to 48 parts of phenolic resin powder, 12 to 25 parts of zinc oxide powder, 3 to 10 parts of calcium carbonate powder, 0.5 to 1.5 parts of chromium oxide powder, 1 to 6 parts of magnesium oxide powder, 1 to 6 parts of silicon oxide powder and 0.5 to 1.5 parts of zinc stearate powder; The second raw material includes 3 to 10 parts of a pore former; The pore-forming agent is sodium sulfate, sodium carbonate, sodium bicarbonate or sodium chloride; In the extending direction of the grinding block, the height of the rear portion is greater than or equal to the height of the front portion.

2. The elastic abrasive tool according to claim 1, characterized in that: In parts by weight, the first raw material includes 5 to 7 parts of diamond powder, 7 to 9 parts of white corundum powder, 38 to 40 parts of phenolic resin powder, 20 to 25 parts of zinc oxide powder, 6 to 8 parts of calcium carbonate powder, 0.5 to 1 part of chromium oxide powder, 2 to 3 parts of magnesium oxide powder, 2 to 4 parts of silicon oxide powder and 0.5 to 1 part of zinc stearate powder; The second raw material includes 3 to 10 parts of a pore former.

3. The elastic abrasive tool according to claim 1 or 2, characterized in that: In the extending direction of the grinding block, the cross-sectional area of ​​the grinding block gradually decreases from the extending start end to the grinding surface.

4. The elastic abrasive tool according to claim 1 or 2, characterized in that: The elastic grinding tool further comprises an elastic layer, which is made of an elastic material and is located between the base and the grinding layer.

5. The elastic abrasive tool according to claim 4, characterized in that: The grinding layer has an attachment wall attached to the surface of the elastic layer, and the plurality of grinding blocks are connected to the attachment wall.

6. A method for manufacturing an elastic abrasive tool, characterized in that: The manufacturing method is used to manufacture the elastic abrasive tool according to any one of claims 1 to 5; The manufacturing method comprises: a mixing step, mixing the first raw material uniformly, and mixing the second raw material uniformly, wherein the second raw material includes the first raw material and a pore-forming agent; In the hot pressing step, the first raw material and the second raw material are sequentially put into a mold and hot pressed into a compact.

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