CN105234806A - Resin binder form diamond abrasive pad and preparation method thereof - Google Patents
Resin binder form diamond abrasive pad and preparation method thereof Download PDFInfo
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- CN105234806A CN105234806A CN201510634053.3A CN201510634053A CN105234806A CN 105234806 A CN105234806 A CN 105234806A CN 201510634053 A CN201510634053 A CN 201510634053A CN 105234806 A CN105234806 A CN 105234806A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/11—Lapping tools
- B24B37/20—Lapping pads for working plane surfaces
- B24B37/22—Lapping pads for working plane surfaces characterised by a multi-layered structure
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- 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
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- 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
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a resin binder form diamond abrasive pad. The resin binder form diamond abrasive pad comprises a diamond material layer, a non-woven fabric layer, a binder layer, a polyethylene terephthalate (PET) film layer and a polycarbonate (PC) plate layer with double faces attached with glue in sequence from top to bottom. The abrasive pad is fully filled without holes, the abrasion resistance and cutting efficiency of the abrasive pad are enhanced, an original tiled material layer is replaced with the flexible binder layer containing carbon nanofibers on the back layer of the abrasive pad, and fracture resistance and impact resistance of the abrasive pad are improved.
Description
Technical field
The present invention relates to optical mirror slip Roughing and fine machining technical field, especially, relate to a kind of resin-bonded formulation diamond lap pad and preparation method thereof.
Background technology
At present, most domestic optical glass producing enterprise starts to gradually adopt solidified abrasive grinding to replace traditional free abrasive dust grinding technics, solidified abrasive grinding technique has higher working (machining) efficiency and product surface quality, and converted products cutting force is stablized, and can effectively reduce production cost.Therefore, the research of solidified abrasive grinding pad has become the focus of attrition process industry, Lens Technology Co., Ltd. has applied for a kind of epoxide resin type diamond lap pad and preparation method thereof (CN201310403745.8), this preparation method is easy and simple to handle, efficiency is high, obtained grinding pad structure is simple, grinding efficiency is high, but there is the problems such as cost of material is high, fold resistance is poor, poor flatness.
Therefore, process improving to be carried out for above problem.
Summary of the invention
The object of the invention is to provide a kind of resin-bonded formulation diamond lap pad and preparation method thereof, and to solve, existing solidified abrasive grinding pad fold resistance is poor, the technical problem of poor flatness.
For achieving the above object, the invention provides a kind of resin-bonded formulation diamond lap pad, described diamond lap pad is followed successively by the PC flaggy of the diamond bed of material, nonwoven layer, adhesive layer, PET film layer, two-sided attached glue from top to bottom; The described diamond bed of material is that the square abrasive block that, gradient increased temperature hot-press solidifying shaping by die casting, precuring by following mass percent component raw material is made is formed:
Resinoid bond 40 ~ 50%;
Diamond 2 ~ 15%;
Wollastonite 35 ~ 45%;
Molybdenum bisuphide 3 ~ 8%;
Aerosil 0.5 ~ 2.5%;
Consisting of of described binding agent: carbon nano-fiber 10 ~ 20%, flexible epoxy resinoid 35 ~ 50%, acid anhydride type curing agent 35 ~ 40%, promoter 0.5 ~ 1%.
Preferably, the diameter of the carbon nano-fiber in binding agent is 50 ~ 200nm, and draw ratio is 1:50 ~ 1:200.
The preparation method of above-mentioned resin-bonded formulation diamond lap pad comprises step:
A, resinoid bond, diamond, wollastonite, molybdenum bisuphide, aerosil are mixed after be filled in mould, after being shakeout on mixed material surface populated in mould, carry out froth in vacuum process; Vacuum values is-92 ~-99Kpa;
B, to shakeout further again, carry out precuring subsequently shaping;
C, after precuring gel, gel surface pastes layer of non-woven fabric, then brush a layer binder equably on non-woven fabrics, and paste PET film, be placed in curing oven and carry out gradient increased temperature hot-press solidifying, cooling and demolding;
Consisting of of described binding agent: carbon nano-fiber 10 ~ 20%, flexible epoxy resinoid 35 ~ 50%, acid anhydride type curing agent 35 ~ 40%, promoter 0.5 ~ 1%;
D, paste on the PC plate of two-sided attached glue again, cutting and get final product.
Preferably, described in steps A, froth in vacuum is treated to: put into froth in vacuum machine process 2 ~ 5 times, each 30 ~ 50min, temperature is 50 ~ 65 DEG C.
Preferably, the precuring condition described in step B is 70 ~ 90 DEG C, keeps 1 ~ 2h.
Preferably, described in step C, the condition of gradient increased temperature hot-press solidifying is: 90 ~ 105 DEG C, keeps 0.3 ~ 0.7h; 110 ~ 120 DEG C, keep 0.3 ~ 0.7h; 125 ~ 140 DEG C, keep 1.5 ~ 3h.
The present invention has following beneficial effect:
The present invention adopts the shaping and grinding pad backing layer brush coating technique of unique precuring, obtained grinding pad inside is filled full, without cavity, greatly strengthen anti-wear performance and the stock-removing efficiency of grinding pad, the flexible adhesion oxidant layer that grinding pad backing layer one deck contains carbon nano-fiber replaces original tiling bed of material, high strength will be had, the carbon nano-fiber of the mechanical property such as high resiliency and high rigidity applies in the gum technique of grinding pad, greatly save the cost of raw material, improve the anti-folding of grinding pad, shock-resistant ability, and improve the surface quality of abrasive product, be conducive to the raising of product yield.
The grinding pad pliability that the present invention proposes, the modification method of fold resistance is easy and simple to handle, efficiency is high, cost reduces about 30%, and obtained diamond lap pad pliability is better, and its anti-folding and impact strength all have and promote significantly.
In addition, it is all cheap convenient source that the present invention also has important feature to be the raw material adopted, and source is wide, greatly reduces the cost of product; Preparation technology's technique of the present invention is simple, easy and simple to handle, low cost, is applicable to suitability for industrialized production.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the preferred embodiment of the present invention;
Fig. 2 is the schematic flow sheet of the preferred embodiment of the present invention;
Wherein, 1, diamond square abrasive block layer, 2, Buddha's warrior attendant building stones tiling layer, 3, nonwoven layer, 4, adhesive layer, 5, PET film layer, 6, the PC flaggy of two-sided attached glue.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can limit according to claim and cover is implemented.
See Fig. 1, the invention provides a kind of resin-bonded formulation diamond lap pad, be followed successively by the PC flaggy of the diamond bed of material, nonwoven layer, adhesive layer, PET film layer, two-sided attached glue from top to bottom; The described diamond bed of material is that the square abrasive block that, gradient increased temperature hot-press solidifying shaping by die casting, precuring by following mass percent component raw material is made is formed:
Resinoid bond 40 ~ 50%;
Diamond 2 ~ 15%;
Wollastonite 35 ~ 45%;
Molybdenum bisuphide 3 ~ 8%;
Aerosil 0.5 ~ 2.5%.
Wherein, the consisting of of binding agent: carbon nano-fiber 10 ~ 20%, flexible epoxy resinoid 35 ~ 50%, acid anhydride type curing agent 35 ~ 40%, promoter 0.5 ~ 1%.The diameter of carbon nano-fiber is 50 ~ 200nm, and draw ratio is 1:50 ~ 1:200.
Carbon nano-fiber (Carbonnanofibers, CNF) is the standard dimension material with carbon element of diameter between nano-sized carbon bamboo and common carbon fibers, and compact structure, has higher intensity; Its mechanical property shows that each carbon atom and surrounding 3 atoms combine with covalent bond, forms tight structure; And its two ends are closed, there is no unsettled chemical bond, make the stability of total stronger, charge forces between the carbon atom of nanoscale in addition, make carbon nano-fiber have the mechanical properties such as high strength, high resiliency and high rigidity, use these useful mechanical properties of carbon fiber in the gum technique of grinding pad, pliability and the flexural capacity of grinding pad can be significantly improved, and the draw ratio of carbon nano-fiber is larger, its pliability is better.
See Fig. 2, the modification method of resin-bonded formulation diamond abrasive tool pliability of the present invention, fold resistance, comprises the following steps:
1) batch mixing: after each powder material drying of diamond layer, sieve, selects the particle of required large small particle diameter; Each powder material screening obtained by proportioning and liquid charging stock join in material cup, and use vacuum planetary stirring machine to stir, the time is 6 ~ 12min, and mixer rotating speed is 400rpm/2 ~ 4min, 500rpm/2 ~ 4min, 600rpm/2 ~ 4min.
2) pour into a mould: by 1) raw material mixed of gained, be filled in the square groove bottom grinding pad silicon rubber mould, and surface is scraped smooth after, put into froth in vacuum machine process 2 ~ 5 times, each 30 ~ 50min, vacuum values is-92 ~-99KPa, and temperature is 50 ~ 65 DEG C, get rid of the bubble in square groove and in batch mixing, allow batch mixing be filled into completely in square groove; After froth in vacuum, further raw material surface is shakeout;
3) precuring is shaping: by 2) surface shakeout after raw material layer to carry out precuring shaping, precuring condition is 70 ~ 90 DEG C, keeps 1 ~ 2h;
4) PET film is pasted: by 3) raw material layer surface mount layer of non-woven fabric after precuring, and at uniformly brushing one deck bonding agent of non-woven fabrics, and paste PET film;
5) hot-press solidifying: 4) smoothly in the PET film that posts cover five layers of glass plate, move in curing oven and be cured, the condition of hot-press solidifying is: at 90 ~ 105 DEG C, keeps 0.3 ~ 0.7h; 110 ~ 120 DEG C, keep 0.3 ~ 0.7h; 125 ~ 140 DEG C, keep 1.5 ~ 3h; After having solidified, naturally cool to room temperature, the demoulding;
6) PC plate is pasted: 4) the grinding pad PET film layer that obtains sticks PC plate, compress with cylinder;
7) cutting: use PET film, PC plate portion that the cutting of plastic uptake die-cutting machine is unnecessary, cutting is shaping.
Specific embodiment is as follows:
Embodiment 1
1) batch mixing: take each raw material by mass percentage, resinoid bond 45%, diamond 10%, wollastonite 39%, molybdenum bisuphide 5%, aerosil 1%, wherein, diamond average grain diameter is 20 μm; Wollastonite average grain diameter 16 μm; Molybdenum bisuphide average grain diameter is 10 μm; The average grain diameter of aerosil is 100nm.Pour into disposable for each raw material taken in material cup, use vacuum planetary stirring machine to stir, the time is 6min, and mixer rotating speed is 400rpm/2min, 500rpm/2min, 600rpm/2min.
2) pour into a mould: by 1) raw material mixed of gained, be filled in the square groove bottom grinding pad silicon rubber mould, and surface is scraped smooth after, put into froth in vacuum machine process 3 times, each 30min, vacuum values is-92KPa, and temperature is 50 DEG C, get rid of the bubble in square groove and in batch mixing, allow batch mixing be filled into completely in square groove; After froth in vacuum, further raw material surface is shakeout;
3) precuring is shaping: by 2) surface shakeout after raw material layer to carry out precuring shaping, precuring condition is 80 DEG C, keeps 1h;
4) PET film is pasted: paste PET film: by 3) raw material layer surface mount layer of non-woven fabric after precuring, ensure that non-woven fabrics and the bed of material permeate completely, brush a layer binder equably and paste PET film, binding agent consists of: carbon nano-fiber 10%, epoxylite 50%, acid anhydride type curing agent 39%, promoter 1%, wherein carbon nano-fiber diameter is 100nm, and draw ratio is: 1:50;
5) hot-press solidifying: 4) the smooth glass plate of the PET film upper cover five layers that posts, move in curing oven and be cured, the condition of hot-press solidifying is: at 100 DEG C, keeps 0.5h; 120 DEG C, keep 0.5h; 130 DEG C, keep 2h; After having solidified, naturally cool to room temperature, the demoulding;
6) PC plate is pasted: 5) the grinding pad PET film layer that obtains sticks PC plate, compress with cylinder;
7) cutting: use PET film, PC plate portion that the cutting of plastic uptake die-cutting machine is unnecessary, cutting is shaping.
Embodiment 2
1) batch mixing: take each raw material by mass percentage, resinoid bond 45%, diamond 10%, wollastonite 39%, molybdenum bisuphide 5%, aerosil 1%, wherein, diamond average grain diameter is 20 μm; Wollastonite average grain diameter 16 μm; Molybdenum bisuphide average grain diameter is 10 μm; The average grain diameter of aerosil is 100nm.Pour into disposable for each raw material taken in material cup, use vacuum planetary stirring machine to stir, the time is 6min, and mixer rotating speed is 400rpm/2min, 500rpm/2min, 600rpm/2min.
2) pour into a mould: by 1) raw material mixed of gained, be filled in the square groove bottom grinding pad silicon rubber mould, and surface is scraped smooth after, put into froth in vacuum machine process 3 times, each 30min, vacuum values is-96KPa, and temperature is 50 DEG C, get rid of the bubble in square groove and in batch mixing, allow batch mixing be filled into completely in square groove; After froth in vacuum, further raw material surface is shakeout;
3) precuring is shaping: by 2) surface shakeout after raw material layer to carry out precuring shaping, precuring condition is 80 DEG C, holds 2h;
4) PET film is pasted: paste PET film: by 3) raw material layer surface mount layer of non-woven fabric after precuring, ensure that non-woven fabrics and the bed of material permeate completely, brush a layer binder equably and paste PET film, binding agent consists of: carbon nano-fiber 16%, epoxylite 44%, acid anhydride type curing agent 39%, promoter 1%, wherein carbon nano-fiber diameter is 200nm, and draw ratio is: 1:100;
5) hot-press solidifying: 4) the smooth glass plate of the PET film upper cover five layers that posts, move in curing oven and be cured, the condition of hot-press solidifying is: at 100 DEG C, keeps 0.5h; 120 DEG C, keep 0.5h; 130 DEG C, keep 2h; After having solidified, naturally cool to room temperature, the demoulding;
6) PC plate is pasted: 5) the grinding pad PET film layer that obtains sticks PC plate, compress with cylinder;
7) cutting: use PET film, PC plate portion that the cutting of plastic uptake die-cutting machine is unnecessary, cutting is shaping.
Embodiment 3:
1) batch mixing: take each raw material by mass percentage, resinoid bond 45%, diamond 10%, wollastonite 39%, molybdenum bisuphide 5%, aerosil 1%, wherein, diamond average grain diameter is 20 μm; Wollastonite average grain diameter 16 μm; Molybdenum bisuphide average grain diameter is 10 μm; The average grain diameter of aerosil is 100nm.Pour into disposable for each raw material taken in material cup, use vacuum planetary stirring machine to stir, the time is 6min, and mixer rotating speed is 400rpm/2min, 500rpm/2min, 600rpm/2min.
2) pour into a mould: by 1) raw material mixed of gained, be filled in the square groove bottom grinding pad silicon rubber mould, and surface is scraped smooth after, put into froth in vacuum machine process 3 times, each 30min, vacuum values is-94KPa, and temperature is 50 DEG C, get rid of the bubble in square groove and in batch mixing, allow batch mixing be filled into completely in square groove; After froth in vacuum, further raw material surface is shakeout;
3) precuring is shaping: by 2) surface shakeout after raw material layer to carry out precuring shaping, precuring condition is 80 DEG C, keeps 2h;
4) PET film is pasted: paste PET film: by 3) raw material layer surface mount layer of non-woven fabric after precuring, ensure that non-woven fabrics and the bed of material permeate completely, brush a layer binder equably and paste PET film, binding agent consists of: carbon nano-fiber 20%, epoxylite 39%, acid anhydride type curing agent 40%, promoter 1%, wherein carbon nano-fiber diameter is 150nm, and draw ratio is: 1:200;
5) hot-press solidifying: 4) the smooth glass plate of the PET film upper cover five layers that posts, move in curing oven and be cured, the condition of hot-press solidifying is: at 100 DEG C, keeps 0.5h; 120 DEG C, keep 0.5h; 130 DEG C, keep 2h; After having solidified, naturally cool to room temperature, the demoulding;
6) PC plate is pasted: 5) the grinding pad PET film layer that obtains sticks PC plate, compress with cylinder;
7) cutting: use PET film, PC plate portion that the cutting of plastic uptake die-cutting machine is unnecessary, cutting is shaping.
Embodiment 4:
1) batch mixing: take each raw material by mass percentage, resinoid bond 40%, diamond 15%, wollastonite 35%, molybdenum bisuphide 8%, aerosil 2%, wherein, diamond average grain diameter is 20 μm; Wollastonite average grain diameter 16 μm; Molybdenum bisuphide average grain diameter is 10 μm; The average grain diameter of aerosil is 100nm.Pour into disposable for each raw material taken in material cup, use vacuum planetary stirring machine to stir, the time is 6min, and mixer rotating speed is 400rpm/2min, 500rpm/2min, 600rpm/2min.
2) pour into a mould: by 1) raw material mixed of gained, be filled in the square groove bottom grinding pad silicon rubber mould, and surface is scraped smooth after, put into froth in vacuum machine process 3 times, each 30min, vacuum values is-99KPa, and temperature is 50 DEG C, get rid of the bubble in square groove and in batch mixing, allow batch mixing be filled into completely in square groove; After froth in vacuum, further raw material surface is shakeout;
3) precuring is shaping: by 2) surface shakeout after raw material layer to carry out precuring shaping, precuring condition is 80 DEG C, keeps 2h;
4) PET film is pasted: paste PET film: by 3) raw material layer surface mount layer of non-woven fabric after precuring, ensure that non-woven fabrics and the bed of material permeate completely, brush a layer binder equably and paste PET film, binding agent consists of: carbon nano-fiber 10%, epoxylite 49%, acid anhydride type curing agent 40%, promoter 1%, wherein carbon nano-fiber diameter is 150nm, and draw ratio is: 1:200;
5) hot-press solidifying: 4) the smooth glass plate of the PET film upper cover five layers that posts, move in curing oven and be cured, the condition of hot-press solidifying is: at 100 DEG C, keeps 0.5h; 120 DEG C, keep 0.5h; 130 DEG C, keep 2h; After having solidified, naturally cool to room temperature, the demoulding;
6) PC plate is pasted: 5) the grinding pad PET film layer that obtains sticks PC plate, compress with cylinder;
7) cutting: use PET film, PC plate portion that the cutting of plastic uptake die-cutting machine is unnecessary, cutting is shaping.
Diamond lap pad after the improvement adopting each embodiment of the present invention to prepare grinds certain glass material under identical processing conditions with the diamond lap pad of old technology, and grinding pad performance and the contrast of converted products performance parameter are as following table.
The properties of embodiment of the present invention grinding pad and old technology grinding pad contrasts
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a resin-bonded formulation diamond lap pad, described diamond lap pad is followed successively by the PC flaggy of the diamond bed of material, nonwoven layer, adhesive layer, PET film layer, two-sided attached glue from top to bottom; It is characterized in that, the described diamond bed of material is that the square abrasive block that, gradient increased temperature hot-press solidifying shaping by die casting, precuring by following mass percent component raw material is made is formed:
Resinoid bond 40 ~ 50%;
Diamond 2 ~ 15%;
Wollastonite 35 ~ 45%;
Molybdenum bisuphide 3 ~ 8%;
Aerosil 0.5 ~ 2.5%;
Consisting of of described binding agent: carbon nano-fiber 10 ~ 20%, flexible epoxy resinoid 35 ~ 50%, acid anhydride type curing agent 35 ~ 40%, promoter 0.5 ~ 1%.
2. resin-bonded formulation diamond lap pad according to claim 1, is characterized in that, the diameter of the carbon nano-fiber in binding agent is 50 ~ 200nm, and draw ratio is 1:50 ~ 1:200.
3. the preparation method of resin-bonded formulation diamond lap pad according to claim 1, is characterized in that, comprise step:
A, resinoid bond, diamond, wollastonite, molybdenum bisuphide, aerosil are mixed after be filled in mould, after being shakeout on mixed material surface populated in mould, carry out froth in vacuum process; Vacuum values is-92 ~-99Kpa;
B, to shakeout further again, carry out precuring subsequently shaping;
C, after precuring gel, gel surface pastes layer of non-woven fabric, then brush a layer binder equably on non-woven fabrics, and paste PET film, be placed in curing oven and carry out gradient increased temperature hot-press solidifying, cooling and demolding;
Consisting of of described binding agent: carbon nano-fiber 10 ~ 20%, flexible epoxy resinoid 35 ~ 50%, acid anhydride type curing agent 35 ~ 40%, promoter 0.5 ~ 1%;
D, paste on the PC plate of two-sided attached glue again, cutting and get final product.
4. preparation method according to claim 3, is characterized in that, described in steps A, froth in vacuum is treated to: put into froth in vacuum machine process 2 ~ 5 times, each 30 ~ 50min, temperature is 50 ~ 65 DEG C.
5. preparation method according to claim 3, is characterized in that, the precuring condition described in step B is 70 ~ 90 DEG C, keeps 1 ~ 2h.
6. preparation method according to claim 3, is characterized in that, described in step C, the condition of gradient increased temperature hot-press solidifying is: 90 ~ 105 DEG C, keeps 0.3 ~ 0.7h; 110 ~ 120 DEG C, keep 0.3 ~ 0.7h; 125 ~ 140 DEG C, keep 1.5 ~ 3h.
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| CN105690240A (en) * | 2016-04-01 | 2016-06-22 | 东莞市中微纳米科技有限公司 | Flexible polishing pad |
| CN108247529A (en) * | 2018-04-02 | 2018-07-06 | 上海欧柏森环境工程管理有限公司 | A kind of stone polishing, crystallization, grinding, cleaning pad |
| CN108687655A (en) * | 2018-06-01 | 2018-10-23 | 上海欧柏森环境工程管理有限公司 | A kind of combination stone polishing, grinding, cleaning pad |
| CN108857867A (en) * | 2018-06-05 | 2018-11-23 | 惠州市科伟特新材料有限公司 | Diamond lap pad and its preparation process |
| CN110922096A (en) * | 2019-12-16 | 2020-03-27 | 韶关大唐研磨材料有限公司 | Diamond gasket and preparation method thereof |
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| CN108687655A (en) * | 2018-06-01 | 2018-10-23 | 上海欧柏森环境工程管理有限公司 | A kind of combination stone polishing, grinding, cleaning pad |
| CN108857867A (en) * | 2018-06-05 | 2018-11-23 | 惠州市科伟特新材料有限公司 | Diamond lap pad and its preparation process |
| CN108857867B (en) * | 2018-06-05 | 2020-09-25 | 黄文魁 | Diamond grinding pad and preparation process thereof |
| CN110922096A (en) * | 2019-12-16 | 2020-03-27 | 韶关大唐研磨材料有限公司 | Diamond gasket and preparation method thereof |
| CN115339121A (en) * | 2021-05-12 | 2022-11-15 | 华侨大学 | Preparation method of flexible sol-gel polishing block |
| CN115339121B (en) * | 2021-05-12 | 2024-06-07 | 华侨大学 | Preparation method of flexible sol-gel polishing block |
| CN114161230A (en) * | 2021-11-29 | 2022-03-11 | 凯吉斯金刚石(广州)有限公司 | Renovation process of marble table top |
| CN114161230B (en) * | 2021-11-29 | 2024-04-12 | 凯吉斯金刚石(广州)有限公司 | Renovating process of marble table top |
| CN114193343A (en) * | 2021-12-29 | 2022-03-18 | 泉州兴启商金刚石工具有限公司 | Novel abrasive disc for diamond grinding and rapid production method thereof |
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