CN111604826A - Large-cutting ceramic brush wheel and preparation method thereof - Google Patents
Large-cutting ceramic brush wheel and preparation method thereof Download PDFInfo
- Publication number
- CN111604826A CN111604826A CN202010577192.8A CN202010577192A CN111604826A CN 111604826 A CN111604826 A CN 111604826A CN 202010577192 A CN202010577192 A CN 202010577192A CN 111604826 A CN111604826 A CN 111604826A
- Authority
- CN
- China
- Prior art keywords
- brush wheel
- cutting
- parts
- resin
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention provides a preparation method of a large-cutting ceramic brush wheel, which comprises the following steps: s1, mixing 75-92 parts of abrasive, 3-6 parts of modified epoxy resin, 8-15 parts of phenolic resin, 2-5 parts of whisker and 1-3 parts of foaming agent, uniformly stirring, and then vibrating and sieving to obtain a mixture; s2, putting the mixture into a die, carrying out hot pressing, cooling and demoulding to obtain a preformed large-cutting ceramic resin abrasive disc; s3, cleaning the surface of the pre-formed large-cutting ceramic resin grinding sheet, uniformly coating glue on the back surface of the grinding sheet, and carrying out die pressing on vulcanized rubber; and S4, cutting and processing the vulcanized grinding sheet, and then winding and bonding the grinding sheet on a supporting pipe containing an elastic porous layer to obtain the ceramic brush wheel. The ceramic brush wheel prepared by the invention has long service life, is easier to remove full-plug resin and reduce copper grinding, is not easy to generate scratches, and is more uniform in grinding; the grinding cutting force is extremely strong, can almost reach the level of abrasive belt grinding force, and is more than 65-75% larger than that of ceramic brush wheels on the market.
Description
Technical Field
The invention relates to the technical field of ceramic grinding brush preparation, in particular to a large-cutting ceramic brush wheel and a preparation method thereof.
Background
The production of the modern PCB faces the challenges of high integration of electronic elements, development of assembly technology and market competition, and promotes the development and great reformation of materials, processes, equipment, detection, standards and the like of the PCB; at present, the thick copper surface plug holes of 5G communication boards, base station boards, automobile boards and medical boards are ground, so that the requirements and standards for production and processing of PCB circuit boards are also improved.
At present, the domestic grinding of soft metal, copper plate, aluminum plate and high-end PCB circuit board mainly adopts non-woven fabric brush wheel, PVA ceramic brush wheel and abrasive belt grinding. When the non-woven fabric brush wheel is adopted to grind a high-end PCB, the cost is low, but the grinding cutting force is low, and the problems of orifice dent, chip falling and the like are easy to generate. Although the cutting force of the PVA ceramic brush wheel is improved to a certain extent compared with that of a non-woven fabric brush wheel, the cutting force of single grinding can only reach about 50% of that of abrasive belt grinding, the production process is complicated, the production period is long, the toxicity of the preparation process is high, and the environment is polluted. The abrasive belt grinding can meet the grinding force requirement on the PCB or the thick copper plate which is difficult to grind, but the grinding force is generally sufficient only in the initial stage, and the obvious problems of high one-time investment cost, scratches during grinding, frequent abrasive belt replacement, influence on production efficiency and the like exist. In view of the above, there is a need in the market for a brush wheel with superior grinding power, no scratch on the grinding plate surface, high production efficiency and no toxicity.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the invention provides a large-cutting ceramic brush wheel and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
a preparation method of a large-cutting ceramic brush wheel comprises the following steps:
s1, mixing 75-92 parts of abrasive, 3-6 parts of modified epoxy resin, 8-15 parts of phenolic resin, 2-5 parts of whisker and 1-3 parts of foaming agent, uniformly stirring, and then vibrating and sieving to obtain a mixture;
s2, putting the mixture obtained in the step S1 into a die, carrying out hot pressing, and then cooling and demoulding to obtain a preformed large-cutting ceramic resin abrasive disc;
s3, cleaning the surface of the pre-formed large cutting ceramic resin abrasive disc, uniformly coating glue on the back surface of the abrasive disc, and carrying out mould pressing on vulcanized rubber to obtain a rubber substrate ceramic resin abrasive disc;
s4, cutting and processing the ceramic resin abrasive disc on the rubber substrate, and then winding and bonding one side containing rubber on a supporting tube containing an elastic porous layer to obtain the large-cutting ceramic brush wheel; in this step, the rubber-based ceramic resin abrasive sheet may be cut into a predetermined shape such as a square or rectangle, and then joined into a band-like shape to be wound around and bonded to the support tube containing the elastic porous layer.
The rubber in the preparation method is natural rubber, preferably, the rubber is clamped butadiene acrylonitrile rubber; the elastic porous layer is made of a foam tube, preferably EVA sponge; the supporting pipe is preferably an electric wood pipe, and can also be a phenolic paper pipe.
Further, the modified epoxy resin is powdery, the gel temperature is 150 ℃, the particle size distribution is 30-150 um, and the structural formula is as follows:
the modified epoxy resin powder has average polymerization degree n greater than 2 and molecular weight greater than 900, and includes bisphenol A epoxy resin with medium molecular weight, high molecular weight and superhigh molecular weight.
Further, the abrasive is one or a mixture of two of diamond, green silicon carbide, boron carbide, white corundum, aluminum oxide and brown corundum.
Further, the phenolic resin is powder, the curing temperature of the phenolic resin is 185 ℃, and the specific gravity of the phenolic resin is 1.25g/cm3。
Further, the whisker is a silicon carbide whisker, an aluminum borate whisker or a potassium titanate whisker.
Further, the foaming agent is an AC foaming agent, a sodium lauryl sulfate foaming agent or an azodicarbonamide foaming agent or foaming microspheres or hollow microspheres.
Furthermore, the volume ratio of the abrasive particles in the abrasive disc is 60-92%.
Further, the abrasive particles have a particle size of less than 60 um.
The invention also discloses the large-cutting ceramic brush wheel obtained by the preparation method.
Compared with the prior art, the invention has the advantages that:
1. the large-cutting ceramic brush wheel manufactured by adopting the thermosetting powder mixed resin hot-pressing method process has the advantages of easier removal of full-plug resin and copper reduction grinding, less possibility of generating scratches and more uniform grinding.
2. The PCB grinding large-cutting ceramic brush wheel has long service life, can be operated continuously, does not need to change brushes frequently, and greatly improves the production efficiency.
3. The PCB grinding large-cutting ceramic brush wheel has extremely strong grinding and cutting force, can almost reach the level of abrasive belt grinding force, and is more than 65-75% larger than the ceramic brush wheel on the market.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a large-cutting ceramic brush wheel according to the present invention.
Fig. 2 is a top view of a large-sized cutting ceramic brush wheel according to the present invention.
FIG. 3 is a schematic view of the rubber-based ceramic resin abrasive disc structure according to the present invention.
In the figure: 10. grinding a ceramic resin sheet; 20. a rubber layer; 30. an elastic porous layer; 40. and (5) supporting the tube.
Detailed Description
All materials, reagents and equipment selected for use in the present invention are well known in the art, but do not limit the practice of the invention, and other reagents and equipment well known in the art may be suitable for use in the practice of the following embodiments of the invention.
Example 1
A preparation method of a large-cutting ceramic brush wheel comprises the following steps:
s1, firstly, 75 parts of green silicon carbide abrasive, 3 parts of modified epoxy resin and 8 parts of phenolic resin powder are stirred at a speed of 80r/min for 3 minutes at room temperature, so that the resin and the abrasive are uniformly mixed. Then 2 parts of silicon carbide whiskers and 1 part of AC foaming agent are added and stirred at the speed of 80r/min for 10 minutes, so that all raw materials are mixed uniformly. Then the prepared mixture is poured into a vibrating screen of 80 meshes, the vibrating and mixing materials are repeatedly sieved by vibration for 2 times, and the obtained mixture is uniformly poured into a container.
S2, weighing the mixture obtained in the step S1 according to the quantity, putting the mixture into a standard mould, and covering the upper cover plate of the mould. And then placing the mold with the mixture on a press of 150 tons, preheating to 200 ℃, flattening an upper cover plate of the mold, maintaining the pressure for 15 minutes, cooling and demolding to obtain the preformed large-cutting ceramic resin abrasive disc.
And S3, processing the prepared pre-formed large-cutting ceramic wheel resin grinding sheet into a size of 204 × 64 × 15mm, cleaning the surface of the pre-formed large-cutting ceramic wheel resin grinding sheet, uniformly coating the surface with glue, and performing mould pressing on the back surface of the grinding sheet to obtain the rubber substrate ceramic resin grinding sheet, wherein the rubber adopted in the embodiment is the butadiene acrylonitrile rubber clamped in the rubber substrate ceramic resin grinding sheet. FIG. 3 shows the rubber-based ceramic resin blade structure, wherein 10 is a ceramic resin blade layer and 20 is a rubber layer.
And S4, cutting and processing the obtained rubber-based ceramic resin abrasive disc into 13 x 13mm and then banding (see figure 3), and then winding and bonding one side containing rubber on a supporting tube containing an elastic porous layer to obtain the large-cutting ceramic brush wheel.
The structural formula of the modified epoxy resin used in this example is as follows:
wherein n is 3.
Referring to fig. 1-2, the large-sized cutting ceramic brush wheel obtained by the preparation method of the present embodiment includes a support tube 40, an elastic porous layer 30 coated on the surface of the support tube 40, a rubber layer 20 coated on the surface of the elastic porous layer 30, and a ceramic resin abrasive layer 10 coated on the surface of the rubber layer 20. Wherein, the support tube 40 is tubular with a hollow structure and is bonded with the elastic porous layer 30 through adhesive; the rubber layer 20 and the elastic porous layer 30 are bonded by an adhesive. In this embodiment, the rubber layer 20 is preferably made of nba, the elastic porous layer 30 is preferably made of EVA sponge, and the support tube 40 is preferably an electric wood tube.
Example 2
A preparation method of a large-cutting ceramic brush wheel is similar to that of example 1, and is different in steps S1 in the following specific steps: 88 parts of boron carbide abrasive, 5 parts of modified epoxy resin, 11 parts of phenolic resin powder, 3 parts of aluminum borate whisker and 2 parts of foaming microsphere. The modified epoxy resin used in this example 1 has a similar structural formula, wherein n is 5.
The structure of the large-sized cutting ceramic brush wheel obtained by the preparation method described in this example is the same as that of example 1.
Example 3
A preparation method of a large-cutting ceramic brush wheel is similar to that of example 1, and is different in steps S1 in the following specific steps: 92 parts of alumina abrasive, 6 parts of modified epoxy resin, 15 parts of phenolic resin powder, 5 parts of potassium titanate whisker and 3 parts of azodicarbonamide foaming agent. The modified epoxy resin used in this example 1 has a similar structural formula, wherein n is 8.
The structure of the large-sized cutting ceramic brush wheel obtained by the preparation method described in this example is the same as that of example 1.
Comparative example 1
A method for preparing a large-cutting ceramic brush wheel comprises the following steps similar to those of example 1, except that step S1 is slightly different:
s1: mixing and stirring 75 parts of green silicon carbide, 7 parts of phenolic resin powder, 3 parts of aluminum borate whisker and 2 parts of AC foaming agent powder uniformly in a planetary stirrer, then adding 5 parts of liquid epoxy resin, fully stirring, and finally adding 3 parts of epoxy resin curing agent, stirring until the raw materials are uniformly mixed. The resulting mixture was poured into an 80# vibrating screen and sieved twice.
The remaining steps are the same as S2 to S4 in example 1.
The structure of the large-sized cutting ceramic brush wheel obtained by the preparation method described in this example is the same as that of example 1.
Comparative example 2
A preparation method of a large-cutting ceramic brush wheel is similar to that of example 1, and is different in steps S1 in the following specific steps: 75 parts of green silicon carbide, 9 parts of modified epoxy resin, 3 parts of liquid phenolic resin, 2 parts of aluminum borate whisker and 10 parts of hollow microspheres.
The structure of the large-sized cutting ceramic brush wheel obtained by the preparation method described in this example is the same as that of example 1.
The performance tests were performed on the large-sized cut ceramic brush wheels obtained in examples 1 to 3 and comparative examples 1 to 2, and the test items, conditions and test results were as follows:
as can be seen from the above table, the large-sized cutting ceramic brush wheel manufactured by the thermosetting powder mixed resin hot-pressing method in examples 1 to 3 has the advantages of easier removal of full-plug resin, copper reduction and grinding, extremely strong grinding cutting force, higher production efficiency, less possibility of scratches, more uniform grinding and longer service life. Comparative examples 1-2 the ceramic brush wheel manufactured by the hot pressing process using the pure liquid resin or the mixture of the liquid and powder resins was easily scratched due to the agglomeration of sand during the mixing, and had a structure having a low cutting force and a short life due to the wrapping effect of the liquid resin.
The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (9)
1. The preparation method of the large-cutting ceramic brush wheel is characterized by comprising the following steps of:
s1, mixing 75-92 parts of abrasive, 3-6 parts of modified epoxy resin, 8-15 parts of phenolic resin, 2-5 parts of whisker and 1-3 parts of foaming agent, uniformly stirring, and then vibrating and sieving to obtain a mixture;
s2, putting the mixture obtained in the step S1 into a die, carrying out hot pressing, and then cooling and demoulding to obtain a preformed large-cutting ceramic resin abrasive disc;
s3, cleaning the surface of the pre-formed large cutting ceramic resin abrasive disc, uniformly coating glue on the back surface of the abrasive disc, and carrying out mould pressing on vulcanized rubber to obtain a rubber substrate ceramic resin abrasive disc;
and S4, cutting the rubber-based ceramic resin abrasive disc, and winding and bonding one side containing rubber on a supporting tube containing an elastic porous layer to obtain the large-cutting ceramic brush wheel.
2. The preparation method of the large-cutting ceramic brush wheel according to claim 1, wherein the modified epoxy resin is in a powder form, the gel temperature is 150 ℃, the particle size distribution is 30-150 um, and the structural formula is as follows:
wherein n is greater than 2.
3. The method for preparing a large cutting ceramic brush wheel according to claim 1, wherein the abrasive is one or a mixture of two of diamond, green silicon carbide, boron carbide, white corundum, alumina and brown corundum.
4. The method for preparing a large-cutting ceramic brush wheel according to claim 1, wherein the phenolic resin is in a powder form, and has a curing temperature of 185 ℃ and a specific gravity of 1.25g/cm3。
5. The method for preparing a large-cutting ceramic brush wheel according to claim 1, wherein the whiskers are silicon carbide whiskers, aluminum borate whiskers or potassium titanate whiskers.
6. The method for preparing a large-cutting ceramic brush wheel according to claim 1, wherein the foaming agent is an AC foaming agent, a sodium lauryl sulfate foaming agent, an azodicarbonamide foaming agent, foamed microspheres or hollow microspheres.
7. The method for manufacturing a large-cutting ceramic brush wheel according to claim 1, wherein the volume ratio of the abrasive grains in the grinding plate is 60-92%.
8. The method for manufacturing a large-cutting ceramic brush wheel according to claim 7, wherein the grain size of the abrasive grains is less than 60 um.
9. A large-cut ceramic brush wheel, characterized by being produced by the method for producing a large-cut ceramic brush wheel according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010577192.8A CN111604826A (en) | 2020-06-22 | 2020-06-22 | Large-cutting ceramic brush wheel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010577192.8A CN111604826A (en) | 2020-06-22 | 2020-06-22 | Large-cutting ceramic brush wheel and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111604826A true CN111604826A (en) | 2020-09-01 |
Family
ID=72194077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010577192.8A Pending CN111604826A (en) | 2020-06-22 | 2020-06-22 | Large-cutting ceramic brush wheel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111604826A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112223130A (en) * | 2020-10-16 | 2021-01-15 | 郑州恒锐磨料磨具有限公司 | Non-magnetic grinding wheel for grinding ball base surface of bearing roller and production process thereof |
| CN115366015A (en) * | 2022-09-20 | 2022-11-22 | 广东捷骏电子科技有限公司 | Preparation method of ceramic brush wheel |
| CN115366014A (en) * | 2022-09-20 | 2022-11-22 | 广东捷骏电子科技有限公司 | Ceramic brush wheel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6273082B1 (en) * | 1991-06-10 | 2001-08-14 | Ultimate Abrasive Systems, L.L.C. | Abrasive cutting tool |
| US7214126B1 (en) * | 2000-07-17 | 2007-05-08 | Kamei Tekkosho Ltd. | Abrasive material |
| CN110877303A (en) * | 2019-12-04 | 2020-03-13 | 东莞市鼎泰鑫电子有限公司 | Organic ceramic grinding brush and preparation method thereof |
-
2020
- 2020-06-22 CN CN202010577192.8A patent/CN111604826A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6273082B1 (en) * | 1991-06-10 | 2001-08-14 | Ultimate Abrasive Systems, L.L.C. | Abrasive cutting tool |
| US7214126B1 (en) * | 2000-07-17 | 2007-05-08 | Kamei Tekkosho Ltd. | Abrasive material |
| CN110877303A (en) * | 2019-12-04 | 2020-03-13 | 东莞市鼎泰鑫电子有限公司 | Organic ceramic grinding brush and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112223130A (en) * | 2020-10-16 | 2021-01-15 | 郑州恒锐磨料磨具有限公司 | Non-magnetic grinding wheel for grinding ball base surface of bearing roller and production process thereof |
| CN115366015A (en) * | 2022-09-20 | 2022-11-22 | 广东捷骏电子科技有限公司 | Preparation method of ceramic brush wheel |
| CN115366014A (en) * | 2022-09-20 | 2022-11-22 | 广东捷骏电子科技有限公司 | Ceramic brush wheel |
| CN115366015B (en) * | 2022-09-20 | 2023-08-15 | 广东捷骏电子科技有限公司 | Preparation method of ceramic brush wheel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111604826A (en) | Large-cutting ceramic brush wheel and preparation method thereof | |
| CN111673631A (en) | Soft metal grinding precision grinding wheel and preparation method thereof | |
| CN106863152B (en) | Metal bonding agent, diamond grinding wheel prepared by adopting metal bonding agent and manufacturing method of diamond grinding wheel | |
| CN103465155B (en) | A kind of epoxide resin type diamond lap pad and preparation method thereof | |
| CN1081971C (en) | Precisely shaped particles and method of making the same | |
| CN1316940A (en) | Polishing pad for semiconductor substrate | |
| CN1316939A (en) | Polishing pad for semiconductor substrate | |
| CN1258241A (en) | Polishing pad for semi-conductor substrate | |
| CN1671510A (en) | Abrasive product, method of making and using the same, and apparatus for making the same | |
| CN1145048A (en) | Method for making powder preform and abrasive articles made therefrom | |
| CN111216037B (en) | Polishing pad and preparation method thereof | |
| CN110877303B (en) | Organic ceramic grinding brush and preparation method thereof | |
| CN101148035A (en) | Soft/hard abrasive grain mixed semi-fixation abrasive grain grinding tool | |
| CN107116485A (en) | A kind of manufacture method of expansion type porous grinding wheel | |
| CN107263342B (en) | Printed wiring board grinding brush wheel resin abrasive disc and its manufacturing method | |
| CN102119202A (en) | High porosity superabrasive resin products and method of manufacture | |
| CN104786138A (en) | Resin bonding agent type diamond grinding pad and manufacturing method thereof | |
| CN113652172A (en) | Elastic abrasive and preparation method thereof | |
| CN111251175A (en) | Grinding pad and preparation method and application thereof | |
| CN109366347A (en) | A kind of grinding pad and preparation method thereof suitable for hard brittle material precise finiss | |
| CN101844333A (en) | Grinding tool and manufacturing method thereof | |
| CN218837398U (en) | Ceramic brush roller | |
| CN111592275A (en) | Radiator and preparation method thereof | |
| CN112500699A (en) | Composite heat conduction material and preparation method thereof | |
| CN115366015B (en) | Preparation method of ceramic brush wheel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200901 |