CN107127688A - One kind cast dry grinding sheet material - Google Patents
One kind cast dry grinding sheet material Download PDFInfo
- Publication number
- CN107127688A CN107127688A CN201710431208.2A CN201710431208A CN107127688A CN 107127688 A CN107127688 A CN 107127688A CN 201710431208 A CN201710431208 A CN 201710431208A CN 107127688 A CN107127688 A CN 107127688A
- Authority
- CN
- China
- Prior art keywords
- dry grinding
- sheet material
- cast dry
- grinding sheet
- material according
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
-
- 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
-
- 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
- B24D18/0072—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses one kind cast dry grinding sheet material, its each component and mass percent are as follows：Bonding agent 30-40%, diamond abrasive 10-15%, carborundum 5-10%, white fused alumina 5-10%, filler 20-30%, toughener 1-5%, coupling agent 0.5-2%, defoamer 0.3-1%.The present invention has the advantages that abrasive particle holds that intensity is high, heat-resist, wearability is good, and it can improve processing effect, reduce processing cost.
Description
Technical field
The present invention relates to the technical field of stone grinder, and in particular to it is good, heat-resisting that a kind of abrasive particle holds intensity height, wearability
The good diamond dry grinding disc of property.
Background technology
Cast dry grinding disc is mainly the stone material cut surface after grinding cutting, and preceding working procedure is metal saw blade, can be with after sawing
Directly using dry grinding disc grinding and polishing light, make sawing face have with surface as glossiness, dry grinding disc grinding finishes and just no longer needs
Want grinding and polishing.
At present, casting type diamond dry grinding disc for stone material grinding, but there is the following aspects in it
The problem of：1st, abrasive particle holds low intensity, and abrasive particle, which is underutilized, just to come off；2nd, what is be ground wears no resistance, and causes grinding to exist
Carcass strength is low in dry milled process, and diamond is sunk, and its grinding is not played and is used；3rd, thin dry grinding disc is in polishing process, stone
The phenomenon such as material surface discolouration and adhesion residue, makes the luminosity of stone material not increase, or even therefore the stone material of processing is scrapped；4th, dry grind
There is gross blow hole in piece surface, and gross blow hole is uncontrollable, and using the bubble removing method vacuumized, then manufacturing cost is high and is difficult to realize
The temperature control of mould.
Therefore, the present inventor makes further research to this, develops a kind of cast dry grinding sheet material, and thus this case produces.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of cast dry grinding sheet material, with abrasive particle holding intensity
The good advantage of high, heat-resist, wearability, it can improve processing effect, reduction processing cost.
In order to solve the above technical problems, the technical solution of the present invention is：
One kind cast dry grinding sheet material, its each component and mass percent are as follows：
Bonding agent 30-40%
Diamond abrasive 10-15%
Carborundum 5-10%
White fused alumina 5-10%
Filler 20-30%
Toughener 1-5%
Coupling agent 0.5-2%
Defoamer 0.3-1%
Further, bonding agent is the one or more in epoxy resin, phenolic resin, melamine resin.
Further, diamond abrasive granularity is the mesh of 50 mesh -3000.
Further, filler is the one or more in aluminum oxide, zinc oxide, ice crystal, tin oxide and cerium oxide.
Further, toughener is the one or more in LNBR, polyvinyl butyral resin and polyvinyl acetate.
Further, coupling agent is silane coupler.
Further, defoamer is one kind in polyethers defoamer and organic silicon defoamer.
One kind cast dry grinding disc, including basic unit and abrasive material working lining, the basic unit is the hair by textle layers and nylon adherent buckle
The composite layer that face or hook face are bonded together by polymeric adhesive, abrasive material working lining is arranged on the surface of textle layers,
The textle layers are any one in polyester fiber cloth, canvas, cotton or non-woven fabrics.
After such scheme, due to have simultaneously added with silane coupler, in its molecule in the formula of the present invention can and
The chemically combined reactive group of inanimate matter material, and the reactive group combined with organic matter materials chemistry, can be very good to improve
The physical and mechanical properties such as bending strength, compression strength, the shear strength of dry grinding disc carcass, and improve profit of the filler in resin
Moist and dispersiveness, so as to improve the wearability of dry grinding disc and improve processing effect；Added with toughener in formula, Ke Yigai
The fragility of kind carcass, improves the comprehensive mechanical property of product；Added with defoamer in formula, dry grinding disc surface and inside can be eliminated
Gross blow hole, can not only improve product appearance, the service life of product can also be extended.Dry grinding disc mode of production partial pressure is made
Two kinds of type and moulding by casting, most producer is by the way of compressing at present.The dry grinding disc carcass that this method is produced
Densification, internal almost pore-free, sharpness is poor in use for such carcass, and thermal diffusivity is also poor, causes sheet material table
Face is unintelligible, and luminosity does not increase.The present invention is by the way of moulding by casting, it is possible to the problem of solving above well.
Brief description of the drawings
Fig. 1 is the structural representation of present invention cast dry grinding disc.
Label declaration
The abrasive material working lining 2 of basic unit's 1 textle layers, 11 nylon adherent buckle 12
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
One kind cast dry grinding sheet material, its each component and mass percent are as follows：Bonding agent 30-40%, diamond abrasive
10-15%, carborundum 5-10%, white fused alumina 5-10%, filler 20-30%, toughener 1-5%, coupling agent 0.5-
2%, defoamer 0.3-1%.
Further, bonding agent is the one or more in epoxy resin, phenolic resin, melamine resin.Epoxy
Resin has excellent adhesive property, and cure shrinkage is small, and hardness is high, pliability preferably, to alkali and most of solvent-stable, often
As the purposes such as cast, dipping, lamination material, bonding agent, coating.Epoxy resin has most strong cohesive force, to metal, nonmetallic
There is very high cohesive force Deng multiple material.This is highly convenient for adding various inserts in grinding tool, and makes grinding tool in filling
It has higher intensity in the case of material large percentage.Secondly, epoxy resin also have certain heat resistance, epoxy resin with
There is 200-300 DEG C of heat resistance after anhydride-cured.
Phenolic resin has been widely used in grinding tool industry, with higher heat resistance, preferable toughness and wearability.In phenol
Contain substantial amounts of phenolic hydroxyl group in urea formaldehyde, highly cross-linked structure can be formed with cured epoxy resin in a heated condition.This
System is to maintain the good adhesion of epoxy resin, and the heat resistance of phenolic resin is maintained again, makes phenolic resin resin/epoxy
Resin can be used for a long time at 260 DEG C.
Melamine resin has larger chemism, and very high glue-joint strength, water-resistant capacity is high, can undergo three
Boiling water more than hour, heat endurance high and low temperature ability to cure compared with strong, good wearability, quick solidifying, be not required to reinforce agent.
Further, diamond abrasive granularity is the mesh of 50 mesh -3000.Diamond abrasive, it is extremely hard, it can play well
Ablation.Carborundum is in irregular shape, relatively more crisp, and sword is gone out during grinding and polishing soon, and enhancing can be played as the abrasive material of auxiliary diamond
Sharp effect；White fused alumina shape is more regular, can increase the abrasion resistance of dry grinding disc.
Further, filler is the one or more in aluminum oxide, zinc oxide, ice crystal, tin oxide and cerium oxide.
Further, toughener is the one or more in LNBR, polyvinyl butyral resin and polyvinyl acetate.
Further, coupling agent is silane coupler.The trade mark has a KH550, KH560, KH570, KH792, DL602, DL171 this
Several models.
Further, defoamer is polyethers defoamer (trade mark can be B-455, B-456, B-457 etc.), organic silicon defoamer
One kind in (trade mark can be DF-22, DF-103, DF-886 etc.), BYK-A555, preferably BYK-A555.
Meanwhile, dry grinding disc is poured into a mould present invention also offers one kind, it includes basic unit 1 and abrasive material working lining 2, the basic unit 1
It is the composite layer being bonded together by textle layers 11 with the hair side of nylon adherent buckle 12 or hook face by polymeric adhesive, mill
Material working lining 2 is arranged on the surface of textle layers 11, and the textle layers 11 is in polyester fiber cloth, canvas, cotton or non-woven fabrics
Any one.The each component of abrasive material working lining 2 and mass percent are as follows：Bonding agent 30-40%, diamond abrasive 10-15%,
Carborundum 5-10%, white fused alumina 5-10%, filler 20-30%, toughener 1-5%, coupling agent 0.5-2%, defoamer
0.3-1%.
Embodiment one
(1) by weight percent, grain size number is the diamond broken material 15% of 50 mesh, and grain size number is the carborundum powder of 80 mesh
Material 10%, grain size number be 200 mesh white fused aluminas 8%, aluminum oxide 13%, zinc oxide 10%, ice crystal 6%, after mechanical agitation,
Add epoxy resin (E44) 10%, liquid phenolic resin 20%, LNBR 5%, coupling agent (KH550) 2%, froth breaking
Agent (BYK-A555) 1%, stirs into uniform, viscosity suitable slurry.
(2) ready base fabric lower berth is fixed on planar working table, then mould is placed in base fabric, and use fixture
It is fixed, the slurry prepared in step (1) is injected in mould by pouring type, is stripped after slurry is struck off and semi-finished product is made.
Semi-finished product are put into after solidifying 2 hours in 160 DEG C of baking ovens, then AB glue is brushed in base fabric, adhered to one layer of nylon buckles hair side, obtain
Embodiment one pours into a mould dry grinding disc.
Embodiment two
(1) by weight percent, grain size number is the diamond broken material 13% of 200 mesh, and grain size number is the carborundum of 200 mesh
Powder 10%, grain size number is 400 mesh white fused aluminas 8%, aluminum oxide 11%, zinc oxide 12%, ice crystal 6%, by mechanical agitation
Afterwards, epoxy resin (E44) 11% is added, liquid phenolic resin 21%, LNBR 5%, coupling agent (KH550) 2% disappears
Infusion (BYK-A555) 1%, stirs into uniform, viscosity suitable slurry.
(2) ready base fabric lower berth is fixed on planar working table, then mould is placed in base fabric, and use fixture
It is fixed, the slurry prepared in step (1) is injected in mould by pouring type, is stripped after slurry is struck off and semi-finished product is made.
Semi-finished product are put into after solidifying 2 hours in 160 DEG C of baking ovens, then AB glue is brushed in base fabric, adhered to one layer of nylon buckles hair side, obtain
Embodiment two pours into a mould dry grinding disc.
Embodiment three
(1) by weight percent, grain size number is the diamond broken material 12% of 1000 mesh, and grain size number is the carbonization of 2000 mesh
Silica flour material 10%, grain size number is 2000 mesh white fused aluminas 8%, and aluminum oxide 10%, zinc oxide 12%, ice crystal 6% is stirred by machinery
After mixing, addition epoxy resin (E44) 12%, liquid phenolic resin 22%, LNBR 5%, coupling agent (KH550) 2%,
Defoamer (BYK-A555) 1%, stirs into uniform, viscosity suitable slurry.
(2) ready base fabric lower berth is fixed on planar working table, then mould is placed in base fabric, and use fixture
It is fixed, the slurry prepared in step (1) is injected in mould by pouring type, is stripped after slurry is struck off and semi-finished product is made.
Semi-finished product are put into after solidifying 1 hour in 170 DEG C of baking ovens, then AB glue is brushed in base fabric, adhered to one layer of nylon buckles hair side, obtain
Embodiment three pours into a mould dry grinding disc.
Example IV
(1) by weight percent, grain size number is the diamond broken material 10% of 2000 mesh, and grain size number is the carbonization of 3000 mesh
Silica flour material 10%, grain size number is 3000 mesh white fused aluminas 8%, and aluminum oxide 12%, zinc oxide 10%, ice crystal 6% is stirred by machinery
After mixing, epoxy resin (E44) 13% is added, liquid phenolic resin 23%, toughener 5%, coupling agent 2%, defoamer 1% is stirred
Mix uniform, viscosity suitable slurry.
(2) ready base fabric lower berth is fixed on planar working table, then mould is placed in base fabric, and use fixture
It is fixed, the slurry prepared in step (1) is injected in mould by pouring type, is stripped after slurry is struck off and semi-finished product is made.
Semi-finished product are put into after solidifying 1 hour in 170 DEG C of baking ovens, then AB glue is brushed in base fabric, adhered to one layer of nylon buckles hair side, obtain
Example IV pours into a mould dry grinding disc.
Comparative example
Trade name KODIA (South Korea), grain size number is respectively 50#, 200#, 1000#, 2000# dry grinding disc.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore the change or modification that claim under this invention and specification are done in every case, it should all belong to the scope that patent of the present invention covers
Within.
Claims (8)
1. one kind cast dry grinding sheet material, it is characterised in that：Its each component and mass percent are as follows：
2. a kind of cast dry grinding sheet material according to claim 1, it is characterised in that：Bonding agent is epoxy resin, phenolic aldehyde
One or more in resin, melamine resin.
3. a kind of cast dry grinding sheet material according to claim 1, it is characterised in that：Diamond abrasive granularity be 50 mesh-
3000 mesh.
4. a kind of cast dry grinding sheet material according to claim 1, it is characterised in that：Filler is aluminum oxide, zinc oxide, ice
One or more in spar, tin oxide and cerium oxide.
5. a kind of cast dry grinding sheet material according to claim 1, it is characterised in that：Toughener be LNBR,
One or more in polyvinyl butyral resin and polyvinyl acetate.
6. a kind of cast dry grinding sheet material according to claim 1, it is characterised in that：Coupling agent is silane coupler.
7. a kind of cast dry grinding sheet material according to claim 1, it is characterised in that：Defoamer be polyethers defoamer and
One kind in organic silicon defoamer.
8. a kind of cast dry grinding disc formed as material described in claim 1, it is characterised in that：Worked including basic unit and abrasive material
Layer, the basic unit is the composite wood that hair side by textle layers and nylon adherent buckle or hook face are bonded together by polymeric adhesive
The bed of material, abrasive material working lining is arranged on the surface of textle layers, and the textle layers is in polyester fiber cloth, canvas, cotton or non-woven fabrics
Any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431208.2A CN107127688B (en) | 2017-06-08 | 2017-06-08 | A kind of casting dry grinding sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431208.2A CN107127688B (en) | 2017-06-08 | 2017-06-08 | A kind of casting dry grinding sheet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107127688A true CN107127688A (en) | 2017-09-05 |
| CN107127688B CN107127688B (en) | 2019-06-28 |
Family
ID=59733883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710431208.2A Active CN107127688B (en) | 2017-06-08 | 2017-06-08 | A kind of casting dry grinding sheet material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107127688B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111037478A (en) * | 2020-01-11 | 2020-04-21 | 邬师荣 | Grinding tool based on chemical fermentation synthesis reaction and manufacturing method thereof |
| CN112873070A (en) * | 2021-01-21 | 2021-06-01 | 泉州众志新材料科技有限公司 | Ceramic tile chamfering abrasive disc and production method thereof |
| CN115338786A (en) * | 2022-08-22 | 2022-11-15 | 广东新劲刚金刚石工具有限公司 | Cast elastic grinding block and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133575A (en) * | 1993-10-29 | 1996-10-16 | 美国3M公司 | Abrasive article, a process of making same, and a method of using same to finish a workpiece surface |
| CN102124070A (en) * | 2008-06-30 | 2011-07-13 | 3M创新有限公司 | Coated abrasive articles and methods of making and using the same |
| CN103056788A (en) * | 2012-12-26 | 2013-04-24 | 厦门宇信金刚石工具有限公司 | Method for preparing sharp type epoxide resin binding agent diamond abrasive tool |
| CN103522208A (en) * | 2013-09-29 | 2014-01-22 | 河南华茂新材料科技开发有限公司 | Binding agent of resin dry grinding wheel, resin dry grinding wheel and method for manufacturing resin dry grinding wheel |
| CN105729316A (en) * | 2016-02-25 | 2016-07-06 | 泉州众志新材料科技有限公司 | Artificial stone grinding plate and preparation method thereof |
| CN106078540A (en) * | 2016-08-18 | 2016-11-09 | 泉州众志新材料科技有限公司 | A kind of Polished crystal tile glazing abrasive disc and preparation method thereof |
-
2017
- 2017-06-08 CN CN201710431208.2A patent/CN107127688B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133575A (en) * | 1993-10-29 | 1996-10-16 | 美国3M公司 | Abrasive article, a process of making same, and a method of using same to finish a workpiece surface |
| CN102124070A (en) * | 2008-06-30 | 2011-07-13 | 3M创新有限公司 | Coated abrasive articles and methods of making and using the same |
| CN103056788A (en) * | 2012-12-26 | 2013-04-24 | 厦门宇信金刚石工具有限公司 | Method for preparing sharp type epoxide resin binding agent diamond abrasive tool |
| CN103522208A (en) * | 2013-09-29 | 2014-01-22 | 河南华茂新材料科技开发有限公司 | Binding agent of resin dry grinding wheel, resin dry grinding wheel and method for manufacturing resin dry grinding wheel |
| CN105729316A (en) * | 2016-02-25 | 2016-07-06 | 泉州众志新材料科技有限公司 | Artificial stone grinding plate and preparation method thereof |
| CN106078540A (en) * | 2016-08-18 | 2016-11-09 | 泉州众志新材料科技有限公司 | A kind of Polished crystal tile glazing abrasive disc and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111037478A (en) * | 2020-01-11 | 2020-04-21 | 邬师荣 | Grinding tool based on chemical fermentation synthesis reaction and manufacturing method thereof |
| CN112873070A (en) * | 2021-01-21 | 2021-06-01 | 泉州众志新材料科技有限公司 | Ceramic tile chamfering abrasive disc and production method thereof |
| CN112873070B (en) * | 2021-01-21 | 2022-07-05 | 泉州众志新材料科技有限公司 | Ceramic tile chamfering abrasive disc and production method thereof |
| CN115338786A (en) * | 2022-08-22 | 2022-11-15 | 广东新劲刚金刚石工具有限公司 | Cast elastic grinding block and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107127688B (en) | 2019-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102513944A (en) | Resin-bonded grinding tool for processing sapphire crystals and preparation method for resin-bonded grinding tool | |
| CN104057403B (en) | A kind of preparation method of the epoxy resin binder diamond grinding tool with high polishing performance | |
| CN110842800B (en) | Diamond resin bonding agent abrasive disc and preparation method and application thereof | |
| CN102581780B (en) | A kind of flexible polishing sheet and manufacture method thereof | |
| EP2370231B1 (en) | Bonded abrasive article | |
| CN102814763B (en) | A kind of Polyimide Resin Bonded Diamond Grinding Wheel and preparation method thereof | |
| CN108349068A (en) | Bonded abrasive article and preparation method thereof | |
| CN103056788A (en) | Method for preparing sharp type epoxide resin binding agent diamond abrasive tool | |
| CN102343559B (en) | Resin grinding wheel and manufacturing method thereof | |
| CN101801610B (en) | Abrasive products including active fillers | |
| CN102343558A (en) | Resin abrasive cutting wheel and manufacturing method thereof | |
| CN107127688A (en) | One kind cast dry grinding sheet material | |
| CN104128894A (en) | Resin grinding wheel preparation method | |
| KR20070002089A (en) | Abrasive articles, compositions, and methods of making the same | |
| CN102814759A (en) | Diamond resin grinding wheel and preparation method thereof | |
| CN207858629U (en) | A kind of resin bonding agent diamond Elastic abrasive body | |
| CN105111673A (en) | Material of phenolic resin diamond grinding tool and preparation method of grinding tool | |
| JP6983179B2 (en) | Curable composition, polished article and its manufacturing method | |
| CN103753411A (en) | Ceramic and resin composite grinding wheel | |
| CN102814745A (en) | Fused zirconia alumina resin grinding wheel and method for preparing same | |
| CN105234842A (en) | Diamond resin grinding tool material and diamond resin grinding wheel | |
| CN110497327A (en) | Big outer diameter resin wheel and preparation method thereof | |
| CN106891271B (en) | A kind of stainless steel cut grinding wheel and preparation method thereof | |
| CN105690240A (en) | Flexible polishing pad | |
| CN104493731A (en) | Super-hard material grinding apparatus using calcium sulfate whisker as binding agent and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Pouring dry grinding piece material Effective date of registration: 20191023 Granted publication date: 20190628 Pledgee: Luojiang sub branch of Bank of China Limited Pledgor: Quanzhou Zhong Zhi new material Science and Technology Ltd. Registration number: Y2019990000331 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |