CN113546731A - Novel nanometer sand mill - Google Patents
Novel nanometer sand mill Download PDFInfo
- Publication number
- CN113546731A CN113546731A CN202110817712.2A CN202110817712A CN113546731A CN 113546731 A CN113546731 A CN 113546731A CN 202110817712 A CN202110817712 A CN 202110817712A CN 113546731 A CN113546731 A CN 113546731A
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- Prior art keywords
- discharging
- main shaft
- grinding cylinder
- ejection
- grinding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
- B02C17/184—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone
- B02C17/1845—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone with return of oversize material to crushing zone
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a novel nano sand mill, and belongs to the technical field of sand mills. The method comprises the following steps: a frame; the grinding cylinder is arranged on the rack, and a feeding hole is formed in the left end of the grinding cylinder; the separation discharging component comprises a driving mechanism, a main shaft with a discharging channel inside, a plurality of separators and a discharging grading wheel; the left end of the main shaft positioned outside the grinding cylinder is provided with a discharge hole, and the right end of the main shaft horizontally penetrates through the grinding cylinder, extends into the grinding cylinder and is driven by a driving mechanism to rotate; the discharging grading wheels are arranged at the right end of the main shaft and are communicated with each other; the discharging grading wheel is internally detachably provided with a discharging screen, and the discharging screen is positioned between the main shaft and the discharging grading wheel. The invention has the advantages of longer material grinding path, narrower particle size distribution and higher efficiency.
Description
Technical Field
The invention relates to the technical field of sand mills, in particular to a novel nanometer sand mill.
Background
There are numerous types of prior sand mills, including mills for dry primary crushing grinding, such as Raymond mills, pile mills, etc.; also included are micron-size wet mills, such as ball-and-disk mills, colloid mills, air-jet mills, ultrasonic mills, agitator mills, homogenizers, emulsifiers, tumbling mills, and the like.
In modern production and life, materials produced by a sand mill are required to be subjected to superfine grinding and smashing again for multiple working procedures. Patent application number is CN109201288A discloses nanometer is grinding equipment and two intelligent nanometer sand mills of sealing for sand mill to and current sand mill have following defect:
(1) traditional machine that grinds is mostly the multichannel ejection of compact, makes the route of material grinding shorter, and the particle size distribution is wide, and efficiency is lower, and the energy consumption is higher.
(2) The discharging design is dispersed, so that the grinding path of the material is short, the particle size of the ground material cannot be kept consistent, and the condition of net blocking is easily caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a novel nano sand mill, which has the advantages of longer material grinding path, narrower particle size distribution and higher efficiency.
One of the purposes of the invention is realized by adopting the following technical scheme: a novel nano-sand mill, comprising:
the rack is used for providing integral stable support;
the grinding cylinder is arranged on the rack, the rack supports the grinding cylinder, a feed port is formed in the left end of the grinding cylinder, and the feed port ensures the possibility of feeding;
the separation discharging component comprises a driving mechanism, a main shaft with a discharging channel inside, a plurality of separators and a discharging grading wheel; a discharge hole is formed in the left end of the main shaft, which is positioned outside the grinding cylinder, and the right end of the main shaft horizontally penetrates through the grinding cylinder, extends into the grinding cylinder and is driven by the driving mechanism to rotate; the separators are positioned in the grinding cylinder and sleeved on the main shaft, the discharging grading wheel is positioned on the right sides of the separators, and the discharging grading wheels are arranged on the right end of the main shaft and communicated with each other; the discharging grading wheel is internally detachably provided with a discharging screen, and the discharging screen is positioned between the main shaft and the discharging grading wheel.
Furthermore, a plurality of notches are formed in the circumferential direction of the discharging grading wheel, and a plurality of through grooves are formed in the circumferential direction of the discharging screen.
Further, the aperture of the notch is larger than that of the through groove, a gap is formed between the discharging screen and the discharging grading wheel, the through groove penetrates through the side wall of the discharging screen, and the notch penetrates through the side wall of the grading wheel.
Furthermore, the driving mechanism is positioned on one side of the grinding cylinder and comprises a motor, a driving belt wheel, a belt and a driven belt wheel; the motor is positioned on one side of the grinding cylinder and fixed on the frame, and the driving belt wheel is sleeved on the power output end of the motor and is movably connected with the driven belt wheel sleeved on the main shaft through the belt;
the main shaft sleeve is provided with a front bearing and a rear bearing, the front bearing and the rear bearing are both positioned on the left side of the grinding cylinder, and the front bearing and the rear bearing are fixed on the rack.
Further, the left end of grinding vessel is provided with the feeding end cover, the feed inlet sets up on the feeding end cover, the right-hand member of grinding vessel is provided with ejection of compact end cover, ejection of compact end cover is provided with and adds zirconium pearl mouth and feed opening.
Furthermore, a cooling water inlet and a cooling water outlet are respectively arranged on the grinding cylinder; and a cooling cavity is arranged on the side wall of the grinding cylinder and is respectively communicated with the cooling water inlet and the cooling water outlet.
Furthermore, the discharge end cover is provided with a cooling channel, the discharge end cover is provided with a water inlet end and a water outlet end respectively, and the cooling channel is communicated with the water inlet end and the water outlet end respectively.
Furthermore, the left end of the main shaft is sleeved with a mechanical seal, and the mechanical seal is arranged at the discharge port.
Furthermore, the separators are uniformly distributed on the main shaft, and a spacer sleeve is arranged between every two adjacent separators.
Further, the separator is a turbine.
Compared with the prior art, the invention has the beneficial effects that:
the right end of the invention is used for discharging by a grading turbine, the main shaft is provided with a plurality of separators, and the rightmost end of the main shaft is provided with a discharging grading wheel, so that the path for grinding materials is longer, the particle size distribution is narrower, the efficiency is higher, and the energy consumption is lower. The discharge grading turbine structure is specially designed through hydrodynamics, the discharge screen is very convenient to disassemble, and the discharge screen can be disassembled as long as the discharge end cover is opened. The discharging grading wheel is designed at the rightmost end of the main shaft, namely the tail end, so that the grinding path of the material is lengthened, the particle size consistency of the ground material is good, and the screen is less prone to blocking.
Drawings
FIG. 1 is a schematic structural diagram of a novel nano-sand mill provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an auxiliary material cleaning assembly in the novel nano-sand mill according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of the other side of an auxiliary material cleaning assembly in the novel nano sand mill according to the specific embodiment of the invention.
In the figure: 1. a frame; 2. a grinding cylinder; 3. a drive mechanism; 4. a main shaft; 5. a separator; 6. a discharging grading wheel; 7. a feed inlet; 8. a discharging screen; 9. a discharge port; 10. a front bearing; 11. a rear bearing; 12. a feed end cap; 13. a discharge end cover; 131. adding zirconium bead openings; 132. a feeding port; 14. a cooling water inlet; 15. a cooling water outlet; 16. a water inlet end; 17. a water outlet end; 18. mechanical sealing; 19. an auxiliary material cleaning component; 191. rotating the handle; 192. an outer cover; 193. an inner rotating disc; 194. a cleaning rod; 195. an internal gear; 196. a pinion gear; 197. a toothed disc.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1 to 3, a novel nano sand mill comprises: the rack 1, the function of the rack 1 provides the integral stable support;
the grinding cylinder 2 is arranged on the rack 1, the rack 1 supports the grinding cylinder 2, a feeding hole 7 is formed in the left end of the grinding cylinder 2, and the feeding hole 7 ensures the possibility of feeding;
the separation discharging assembly comprises a driving mechanism 3, a main shaft 4, a plurality of separators 5 and a discharging grading wheel 6, wherein the driving mechanism 3 provides overall power for the separation discharging assembly, and the main shaft 4 is internally provided with a discharging channel; a discharge port 9 is formed in the left end of the main shaft 4 positioned outside the grinding cylinder 2, the discharge port 9 provides a material discharging function, and the right end of the main shaft 4 horizontally penetrates through the grinding cylinder 2 and extends into the grinding cylinder 2 and is driven to rotate by the driving mechanism 3; the separators 5 are positioned in the grinding cylinder 2 and sleeved on the main shaft 4, the discharging grading wheel 6 is positioned on the right side of the separators 5, and the discharging grading wheel 6 is arranged on the right end of the main shaft 4 and communicated with each other; can dismantle in the ejection of compact grading wheel 6 and be provided with ejection of compact screen cloth 8, ejection of compact screen cloth 8 can conveniently dismantle it, and ejection of compact screen cloth 8 is located between main shaft 4 and the ejection of compact grading wheel 6, ensures the isolation effect of screen cloth.
The right end of the invention is used for discharging by a grading turbine, the main shaft 4 is provided with a plurality of separators 5, and the rightmost end of the main shaft 4 is provided with a discharging grading wheel 6, so that the path for grinding materials is longer, the particle size distribution is narrower, the efficiency is higher, and the energy consumption is lower. The discharge grading turbine structure is specially designed through hydrodynamics, the discharge screen 8 is very convenient to disassemble, and the discharge screen 8 can be disassembled only by opening the discharge end cover 13. The discharging grading wheel 6 is designed at the rightmost end, namely the tail end, of the main shaft 4, so that the grinding path of the materials is lengthened, the particle size consistency of the ground materials is good, and the net is less prone to blocking. The left end through main shaft 4 sets up to discharge gate 9, and the left end of grinding vessel 2 is feed inlet 7, and main shaft 4 drives the mill and grinds the ejection of compact grading wheel 6 through the right-hand member after refining the processing to the material from left to right, carries to the discharge gate 9 outside through the discharging channel of main shaft 4 at last, accomplishes the output of grinding material. In addition, a plurality of grinding lugs can be arranged on the inner cylinder, namely the inner wall of the grinding cylinder 2, so that the grinding effect is improved. The zirconium bead adding opening 131 is arranged to facilitate the addition of zirconium beads, and the feed opening 132 can discharge the zirconium beads or retain the remaining materials. Need place zirconium pearl cooperation separator 5 in grinding vessel 2 and stir the grinding material to improve grinding effect and efficiency.
A plurality of notches are circumferentially formed in the discharging grading wheel 6, the discharging effect is improved through the notches, a plurality of through grooves are circumferentially formed in the discharging screen 8, and the uniform reliability of efficient discharging is ensured. The discharging grading wheel 6 is arranged in the circumferential direction, namely the outer wall can be provided with a plurality of notches, the discharging screen 8 is arranged in the circumferential direction, namely the outer wall of the machine can be provided with a plurality of through grooves, and in addition, the tail end of the optional discharging grading wheel 6, namely the right end face, is provided with the notches;
the aperture of notch is greater than the aperture that leads to the groove, and wherein, has the clearance between ejection of compact screen cloth 8 and the ejection of compact grading wheel 6, leads to the lateral wall that the groove runs through ejection of compact screen cloth 8, and the notch runs through the lateral wall of grading wheel. In this embodiment, ejection of compact screen cloth 8 is the tube-shape cover and locates on main shaft 4, through breach and ejection of compact screen cloth 8 intercommunication on the main shaft 4, ejection of compact screen cloth 8, ejection of compact grading wheel 6 and main shaft 4 are together rotatory, and the bore of notch is greater than the bore that leads to the groove and carries out the branch material in grades, avoids blockking up and guarantees that enough thin material just is enough to fall into logical groove.
The driving mechanism 3 is positioned at one side of the grinding cylinder 2, and the driving mechanism 3 comprises a motor, a driving belt wheel, a belt and a driven belt wheel; the motor is positioned on one side of the grinding cylinder 2 and fixed on the frame 1, and the driving belt wheel is sleeved on the power output end of the motor and is movably connected with the driven belt wheel sleeved on the main shaft 4 through a belt; the main shaft 4 is sleeved with a front bearing 10 and a rear bearing 11, the front bearing 10 and the rear bearing 11 are both positioned on the left side of the grinding cylinder 2, and the front bearing 10 and the rear bearing 11 are fixed on the frame 1. The front bearing 10 and the rear bearing 11 are arranged to ensure the rotation precision of the main shaft 4, the motor is arranged above the main shaft 4 and is arranged on the frame 1, the motor drives the main shaft 4 to rotate through belt transmission, and the main shaft 4 drives the separator 5 to stir and grind materials in the grinding cylinder 2. The motor, the driving pulley, the belt and the driven pulley are not shown by reference numerals, but the positions of the components and the connection mode can be obviously obtained in the figure.
The left end of grinding vessel 2 is provided with feeding end cover 12, and feed inlet 7 sets up on feeding end cover 12, and the right-hand member of grinding vessel 2 is provided with ejection of compact end cover 13, and ejection of compact end cover 13 is provided with adds zirconium pearl mouth 131 and feed opening 132. The zirconium bead adding opening 131 is arranged to facilitate the addition of zirconium beads, and the feed opening 132 can discharge the zirconium beads or retain the remaining materials.
The grinding cylinder 2 is respectively provided with a cooling water inlet 14 and a cooling water outlet 15; the side wall of the grinding cylinder 2 is provided with a cooling cavity which is respectively communicated with a cooling water inlet 14 and a cooling water outlet 15. A cooling water inlet 14 is arranged for introducing cooling water, and the cooling water flows through the cooling cavity and cools the heat of the grinding cylinder 2 and then is discharged through a cooling water outlet 15.
The discharge end cover 13 is provided with a cooling channel, the discharge end cover 13 is provided with a water inlet end 16 and a water outlet end 17 respectively, and the cooling channel is communicated with the water inlet end 16 and the water outlet end 17 respectively. The water inlet end 16 is arranged to allow cold water to enter the cooling channel in the discharge end cover 13 and to flow through the water outlet end 17 to be discharged, thereby facilitating cooling of the discharge end cover 13.
The left end of the main shaft 4 is sleeved with a mechanical seal 18, and the mechanical seal 18 is arranged at the discharge hole 9. The mechanical seal 18 is arranged for connection with a discharge device, such as a power device such as a material pump, for facilitating discharge.
The separators 5 are respectively and uniformly distributed on the main shaft 4, and a spacer sleeve is arranged between every two adjacent separators 5. The separator 5 is convenient to mount by arranging the spacing sleeve, and the separator 5 is arranged on the outer wall of the main shaft 4 at equal intervals, so that the grading grinding effect is more uniform.
The separator 5 is a turbine, so that the discharging effect is improved.
The auxiliary material cleaning assembly 19 comprises an outer sealing cover 192, an inner rotary disc 193 is rotatably arranged at the center of the outer sealing cover 192, a rotating handle 191 is fixedly arranged on the surface of the inner rotary disc 193, the rotating handle 191 is positioned on the edge surface of the inner rotary disc 193, a toothed disc 197 is fixedly arranged on the surface of the outer sealing cover 192, which is away from the inner rotary disc 193, the inner rotary disc 193 is connected with an inner gear 195, a plurality of small gears 196 are rotatably arranged between the inner gear 195 and the toothed disc 197, a cleaning rod 194 is fixedly arranged on each small gear 196, and the small gears 196 are meshed with the inner gear 195 and the toothed disc 197;
when the whole device is used, the discharging end cover 13 is detached, the auxiliary cleaning component 19 is installed, the rotating handle 191 is rotated, the rotating handle 191 drives the inner gear 195 to integrally rotate, the inner gear 195 and the toothed disc 197 are meshed and rotate through the pinion 196, and the rotation of the pinion 196 drives the cleaning rod 194 to roll, so that the inside of the cleaning rod is wiped.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (8)
1. A novel nanometer sand mill is characterized by comprising: the grinding machine comprises a rack (1), wherein a grinding cylinder (2) is fixedly arranged on the surface of the rack (1), a feeding hole (7) is formed in one side of the grinding cylinder (2), and a separation discharging assembly is arranged on the surface of the rack (1) and positioned inside the grinding cylinder (2);
the separation discharging component comprises a main shaft (4), a discharging channel is formed in the main shaft (4), a plurality of separators (5) are arranged on the surface of one end of the main shaft (4), a discharging grading wheel (6) is fixedly arranged on the main shaft (4) and is in the same end with the separators (5), a discharging port (9) is formed in the surface of one side, away from the separators (5), of the grinding cylinder (2), a detachable discharging screen (8) is arranged on the surface of the discharging grading wheel (6).
2. The new nano sand mill as claimed in claim 1, wherein: a plurality of notch has been seted up to ejection of compact grading wheel (6) circumference, a plurality of logical groove has been seted up to ejection of compact screen cloth (8) circumference, the bore of notch is greater than the bore that leads to the groove, the clearance has between ejection of compact screen cloth (8) and ejection of compact grading wheel (6), lead to the lateral wall that the groove runs through ejection of compact screen cloth (8), the lateral wall that the notch runs through ejection of compact grading wheel (6).
3. The new nano sand mill as claimed in claim 1, wherein: the surface of the rack (1) is provided with a driving mechanism (3), the driving mechanism (3) comprises a motor, a driving belt wheel, a belt and a driven belt wheel, and the main shaft (4) is connected through the driving belt wheel, the belt and the driven transmission on the driving mechanism (3);
the grinding machine is characterized in that a front bearing (10) and a rear bearing (11) are sleeved on the surface of the main shaft (4), the front bearing (10) and the rear bearing (11) are located on the left side of the grinding cylinder (2), and the front bearing (10) and the rear bearing (11) are fixed on the rack (1).
4. The new nano sand mill as claimed in claim 1, wherein: the left end of grinding vessel (2) is provided with feeding end cover (12), feed inlet (7) set up on feeding end cover (12), the right-hand member of grinding vessel (2) is provided with ejection of compact end cover (13), be provided with on ejection of compact end cover (13) with zirconium pearl mouth (131) and feed opening (132).
5. The new nano sand mill as claimed in claim 1, wherein: the grinding cylinder (2) is provided with a cooling water inlet (14) and a cooling water outlet (15) respectively; the side wall of the grinding cylinder (2) is provided with a cooling cavity, and the cooling cavity is respectively communicated with a cooling water inlet (14) and a cooling water outlet (15).
6. The novel nano-sand mill as claimed in claim 4, wherein: the discharging end cover (13) is provided with a cooling channel, the discharging end cover (13) is provided with a water inlet end (16) and a water outlet end (17) respectively, and the cooling channel is communicated with the water inlet end (16) and the water outlet end (17) respectively.
7. The new nano sand mill as claimed in claim 2, wherein: the left end of the main shaft (4) is sleeved with a mechanical seal (18), and the mechanical seal (18) is arranged at the discharge hole (9).
8. The new nano sand mill as claimed in claim 1, wherein: the separators (5) are uniformly distributed on the main shaft (4), a spacer sleeve is arranged between every two adjacent separators (5), and each separator (5) is a turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110817712.2A CN113546731A (en) | 2021-07-20 | 2021-07-20 | Novel nanometer sand mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110817712.2A CN113546731A (en) | 2021-07-20 | 2021-07-20 | Novel nanometer sand mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113546731A true CN113546731A (en) | 2021-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110817712.2A Pending CN113546731A (en) | 2021-07-20 | 2021-07-20 | Novel nanometer sand mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN113546731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130485A (en) * | 2021-11-25 | 2022-03-04 | 东莞市华汇精密机械有限公司 | Double-convex-pin-type nano sand mill |
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| CN104959196A (en) * | 2015-06-29 | 2015-10-07 | 广州派勒机械设备有限公司 | Super sand mill with double-separation system |
| CN107520025A (en) * | 2017-07-31 | 2017-12-29 | 昆明理工大学 | A kind of portable mill for Chinese medicine |
| EP3441144A1 (en) * | 2016-05-09 | 2019-02-13 | Boyee (Shenzhen) Industrial Technology Co., Ltd. | Stirring-type grinding separator and grinding device |
| CN209631373U (en) * | 2018-12-24 | 2019-11-15 | 天津盛达新材料有限公司 | Coating flour mill |
| CN209885912U (en) * | 2019-04-11 | 2020-01-03 | 东莞市纳隆机械设备有限公司 | Improved sand mill |
| CN111389525A (en) * | 2020-04-25 | 2020-07-10 | 东莞市华汇精密机械有限公司 | Trapezoidal laminated nano sand mill |
| CN112121931A (en) * | 2020-07-24 | 2020-12-25 | 湖南南国设备科技有限公司 | Reflective grinding barrel, grinding system and grinding machine |
| CN112517156A (en) * | 2020-11-16 | 2021-03-19 | 苏州皇冠涂料科技发展有限公司 | Vertical sand mill of water based paint |
-
2021
- 2021-07-20 CN CN202110817712.2A patent/CN113546731A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1499013A (en) * | 1974-04-01 | 1978-01-25 | Matsumoto K | Apparatus and method for pulverizing and sorting municipal waste |
| CN104959196A (en) * | 2015-06-29 | 2015-10-07 | 广州派勒机械设备有限公司 | Super sand mill with double-separation system |
| EP3441144A1 (en) * | 2016-05-09 | 2019-02-13 | Boyee (Shenzhen) Industrial Technology Co., Ltd. | Stirring-type grinding separator and grinding device |
| CN107520025A (en) * | 2017-07-31 | 2017-12-29 | 昆明理工大学 | A kind of portable mill for Chinese medicine |
| CN209631373U (en) * | 2018-12-24 | 2019-11-15 | 天津盛达新材料有限公司 | Coating flour mill |
| CN209885912U (en) * | 2019-04-11 | 2020-01-03 | 东莞市纳隆机械设备有限公司 | Improved sand mill |
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| CN112121931A (en) * | 2020-07-24 | 2020-12-25 | 湖南南国设备科技有限公司 | Reflective grinding barrel, grinding system and grinding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130485A (en) * | 2021-11-25 | 2022-03-04 | 东莞市华汇精密机械有限公司 | Double-convex-pin-type nano sand mill |
| CN114130485B (en) * | 2021-11-25 | 2022-06-14 | 东莞市华汇精密机械有限公司 | Double-convex-pin-type nano sand mill |
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Application publication date: 20211026 |
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| RJ01 | Rejection of invention patent application after publication |