CN111530555A - Grinding device machine for quartz sand - Google Patents
Grinding device machine for quartz sand Download PDFInfo
- Publication number
- CN111530555A CN111530555A CN202010410782.1A CN202010410782A CN111530555A CN 111530555 A CN111530555 A CN 111530555A CN 202010410782 A CN202010410782 A CN 202010410782A CN 111530555 A CN111530555 A CN 111530555A
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- Prior art keywords
- grinding
- quartz sand
- machine body
- rotating shaft
- disc
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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
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
- B02C7/08—Crushing or disintegrating by disc mills with coaxial discs with vertical axis
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/02—Feeding devices
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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
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/16—Driving mechanisms
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a grinding device machine for quartz sand, which comprises a machine body, wherein a grinding structure is arranged on the machine body; the abrasive structure includes: the device comprises a driving part, a first rotating shaft, a receiving disc and a grinding part; the quartz sand grinding machine has the advantages that the upper grinding disc and the lower grinding disc are driven by the rotating motor to grind quartz sand, the framework is simple, operation of workers is facilitated, production cost and maintenance cost are reduced, the upper grinding disc and the lower grinding disc rotate simultaneously, grinding efficiency is improved, and grinding work of the quartz sand is completed simply and conveniently.
Description
Technical Field
The invention relates to the technical field of quartz sand production, in particular to a quartz sand grinding device.
Background
Quartz sand is a nonmetallic mineral, is a hard, wear-resistant, chemically stable silicate mineral, and has SiO2 as the main mineral component.
The color of the quartz sand is milky white or colorless and semitransparent, the hardness is 7, the quartz sand is an important industrial mineral raw material and a non-chemical dangerous product, and the quartz sand is widely used in the industries of glass, casting, ceramics and refractory materials, smelting ferrosilicon, metallurgical flux, metallurgy, building, chemical industry, plastics, rubber, grinding materials and the like.
The quartz sand needs to be ground firstly when in use, the existing quartz sand grinding device is too complex in structure, too high in production cost, inconvenient to maintain and maintain for workers, high in operation difficulty, low in production efficiency, unobvious in grinding effect of a common grinding device and high in operation difficulty, and therefore a grinding device capable of solving the problems is urgently needed.
Disclosure of Invention
The invention aims to solve the problems, designs a grinding device machine for quartz sand, and solves the problems that the existing quartz sand grinding device is too complex in structure, too high in production cost, inconvenient for maintenance and repair of workers, high in operation difficulty, low in production efficiency, unobvious in grinding effect of a common grinding device and high in operation difficulty.
The technical scheme of the invention for realizing the aim is as follows: a grinding device machine for quartz sand comprises a machine body, wherein a grinding structure is arranged on the machine body;
the abrasive structure includes: the device comprises a driving part, a first rotating shaft, a receiving disc and a grinding part;
the grinding part is fixedly arranged on the first rotating shaft and movably connected to the driving part respectively.
Preferably, the grinding part includes: the grinding device comprises a lower grinding disc, a grinding table, two second bearings, a second rotating shaft, an upper grinding disc and a feeding assembly;
the lower grinding disc is fixed on the first rotating shaft, the grinding table is fixed on the lower grinding disc, the two second bearings are respectively arranged at the upper end inside the machine body and on the grinding table, the two ends of the second rotating shaft are respectively fixed on the two second bearings, the upper grinding disc is fixed on the second rotating shaft, and the feeding assembly is arranged at the upper end of the machine body.
Preferably, the driving part includes: the device comprises a rotating motor, a third bearing, a third rotating shaft, two first gears and a second gear;
the rotating motor is arranged on the left side in the machine body, the third bearing is arranged on the upper end of the left side of the machine body, two ends of the third rotating shaft are respectively fixed to the driving end of the rotating motor and the third bearing, the two first gears are respectively sleeved on the third rotating shaft, the second gear is arranged on the upper end inside the machine body through a fourth bearing, and the second gear is meshed with one of the two first gears.
Preferably, the feeding assembly comprises: a hopper and a control valve;
the hopper runs through the upper end of the machine body, and the control valve is arranged at the lower end of the hopper.
Preferably, a stabilizing frame is arranged at the joint of the hopper and the machine body.
Preferably, a plurality of first through holes are formed in the lower grinding disc, first clamping teeth are formed in the outer wall surface of the lower grinding disc, a plurality of second through holes are formed in the upper grinding disc, and second clamping teeth are formed in the outer wall surface of the upper grinding disc.
Preferably, the first latch is engaged with one of the two first gears.
Preferably, the second latch is engaged with the second gear.
Preferably, the upper end face of the upper grinding disc is provided with a first limit strip and a second limit strip.
Preferably, a protective cover is installed outside the rotating electric machine.
According to the grinding device machine for the quartz sand, which is manufactured by the technical scheme of the invention, the upper grinding disc and the lower grinding disc are driven by the rotating motor to grind the quartz sand, the structure is simple, the operation of workers is facilitated, the production cost and the maintenance cost are reduced, the upper grinding disc and the lower grinding disc rotate simultaneously, the grinding efficiency is improved, and the grinding work of the quartz sand is simply and conveniently completed.
Drawings
FIG. 1 is a schematic sectional view of a quartz sand grinder according to the present invention.
FIG. 2 is a schematic front view of a quartz sand grinder according to the present invention.
FIG. 3 is a schematic diagram of a right side view of the grinding apparatus for quartz sand according to the present invention.
FIG. 4 is a schematic top view of an upper grinding disc of the quartz sand grinder of the present invention.
FIG. 5 is a schematic top view of a lower grinding disc of the quartz sand grinder of the present invention.
In the figure: 1. a body; 2. a first rotating shaft; 3. a take-up pan; 4. a lower grinding disc; 5. grinding a platform; 6. a second bearing; 7. a second rotating shaft; 8. an upper grinding disc; 9. a rotating electric machine; 10. a third bearing; 11. a third rotating shaft; 12. a first gear; 13. a second gear; 14. a hopper; 15. a control valve; 16. a stabilizing frame; 17. a first through hole; 18. a first latch; 19. a second through hole; 20. a second latch; 21. a first limit strip; 22. a second limit strip; 23. a protective cover.
Detailed Description
The invention will be described in detail with reference to the accompanying drawings, and as shown in fig. 1-5, a grinding device for quartz sand comprises a machine body 1, wherein a grinding structure is arranged on the machine body 1; the abrasive structure includes: the device comprises a driving part, a first rotating shaft 2, a receiving disc 3 and a grinding part; the drive division is settled on organism 1, first pivot 2 is settled in 1 lower extreme of organism through first bearing, take-up (stock) pan 3 runs through first pivot 2 and settles in 1 lower extreme of organism, grinding portion is fixed settling respectively in first pivot 2 and swing joint in drive division, grinding portion includes: the grinding device comprises a lower grinding disc 4, a grinding table 5, two second bearings 6, a second rotating shaft 7, an upper grinding disc 8 and a feeding assembly; the lower grinding disc 4 is fixed on the first rotating shaft 2, the grinding table 5 is fixed on the lower grinding disc 4, the second bearings 6 are respectively arranged at the upper end inside the machine body 1 and on the grinding table 5, the two ends of the second rotating shaft 7 are respectively fixed on the second bearings 6, the upper grinding disc 8 is fixed on the second rotating shaft 7, the feeding assembly is arranged at the upper end of the machine body 1, and the driving part comprises: a rotating electrical machine 9, a third bearing 10, a third rotating shaft 11, two first gears 12 and a second gear 13; the rotating electrical machine 9 is arranged on the left side of the machine body 1, the third bearing 10 is arranged on the upper end of the left side of the machine body 1, two ends of the third rotating shaft 11 are respectively fixed on the driving end of the rotating electrical machine 9 and the third bearing 10, the two first gears 12 are respectively sleeved on the third rotating shaft 11, the second gear 13 is arranged on the upper end of the inner part of the machine body 1 through a fourth bearing, the second gear 13 is meshed with one of the first gears 12 of the two first gears 12, and the feeding assembly comprises: a hopper 14 and a control valve 15; the hopper 14 penetrates through the upper end of the machine body 1, the control valve 15 is arranged at the lower end of the hopper 14, a stabilizing frame 16 is arranged at the joint of the hopper 14 and the machine body 1, a plurality of first through holes 17 are formed in the lower grinding disc 4, a first clamping tooth 18 is formed in the outer wall surface of the lower grinding disc 4, a plurality of second through holes 19 are formed in the upper grinding disc 8, a second clamping tooth 20 is formed in the outer wall surface of the upper grinding disc 8, the first clamping tooth 18 is meshed with one of the two first gears 12, the second clamping tooth 20 is meshed with the second gear 13, a first limiting strip 21 and a second limiting strip 22 are arranged on the upper end surface of the upper grinding disc 8, and a protective cover 23 is arranged on the outer side of the rotating motor 9.
The embodiment is characterized by comprising a machine body, wherein a grinding structure is arranged on the machine body; the grinding structure includes: the device comprises a driving part, a first rotating shaft, a receiving disc and a grinding part; the grinding part is fixedly arranged on the first rotating shaft and movably connected to the driving part respectively; the upper grinding disc and the lower grinding disc are driven by the rotating motor to grind the quartz sand, the structure is simple, the operation of workers is facilitated, the production cost and the maintenance cost are reduced, the upper grinding disc and the lower grinding disc rotate simultaneously, the grinding efficiency is improved, and the grinding work of the quartz sand is simply and conveniently completed.
All the electrical components in the present application are connected with the power supply adapted to the electrical components through the wires, and an appropriate controller should be selected according to actual conditions to meet the control requirements, and specific connection and control sequences should be obtained.
Example (b): a grinding device machine for quartz sand comprises a machine body 1, wherein a grinding structure is arranged on the machine body 1;
referring to fig. 1-5, in an embodiment, a polishing structure comprises: the device comprises a driving part, a first rotating shaft 2, a receiving disc 3 and a grinding part; the connection relationship is as follows:
the drive division is settled on organism 1, and first pivot 2 is settled in 1 lower extreme of organism through first bearing, and take-up (stock) pan 3 runs through first pivot 2 and settles in 1 lower extreme of organism, and grinding portion is fixed settling respectively in first pivot 2 and swing joint in drive division.
In the specific implementation process, it should be specifically noted that the grinding part includes: the grinding device comprises a lower grinding disc 4, a grinding table 5, two second bearings 6, a second rotating shaft 7, an upper grinding disc 8 and a feeding assembly; the connection relationship is as follows:
In the specific implementation process, it is specifically pointed out that the driving part comprises: a rotating electrical machine 9, a third bearing 10, a third rotating shaft 11, two first gears 12 and a second gear 13; the connection relationship is as follows:
rotating electrical machines 9 settle in the left side in organism 1, and third bearing 10 settles in organism 1 left side upper end, and on the drive end that rotating electrical machines 9 and third bearing 10 were fixed in respectively at the both ends of third pivot 11, two first gears 12 suit respectively on third pivot 11, and second gear 13 settles in organism 1 inside upper end through the fourth bearing, and second gear 13 meshes on one of them first gear 12 of two first gears 12.
In a specific implementation process, it should be noted that the feeding assembly includes: a hopper 14 and a control valve 15; the connection relationship is as follows:
the hopper 14 penetrates the upper end of the machine body 1, and the control valve 15 is arranged at the lower end of the hopper 14.
From the above general situation it follows that: firstly, during operation, a worker puts quartz sand into the hopper 14, then opens the control valve 15, the quartz sand falls into the upper millstone 8, preferably, further, the upper millstone 8 is provided with a plurality of second through holes 19, the quartz sand falls through the plurality of second through holes 19 and falls onto the lower millstone 4, at the same time, the rotating motor 9 rotates to drive the third rotating shaft 11 to rotate through the third bearing 10, the two first gears 12 rotate, preferably, further, the outer wall surface of the lower millstone 4 is provided with a first latch 18, the first latch 18 is engaged with one of the first gears 12, one of the first gears 12 drives the lower millstone 4 and the grinding table 5 on the lower millstone 4 to rotate through the first rack, preferably, further, the outer wall surface of the upper millstone 8 is provided with a second latch 20, the second latch 20 is engaged with the second gear 13, the other first gear 12 drives the second gear 13 to rotate, the second rotation rotates along with the second latch 20, at this time, the upper grinding disc 8 and the grinding table 5 of the lower grinding disc 4 rotate in opposite directions, when the upper grinding disc 8 rotates, preferably, the upper end surface of the upper grinding disc 8 is provided with a first limit strip 21 and a second limit strip 22, the first limit strip 21 and the second limit strip 22 are used for limiting the lower end of the hopper 14, quartz sand is prevented from scattering around when falling from the hopper 14, as the quartz sand falls into the inner side of the lower grinding disc 4 through the second through hole 19, the upper grinding disc 8 and the lower grinding disc 4 rotate in opposite directions to grind the quartz sand, and as the upper grinding disc 8 and the lower grinding disc 4 rotate, crushed quartz sand after grinding enters the material receiving disc 3 through the plurality of first through holes 17, because the inclined plane is arranged on the inner side of the receiving disc 3, the inclined plane is convenient for the ground quartz sand to slide downwards and then collected by workers.
Preferably, a fixing frame 16 is further installed at the connection position of the hopper 14 and the machine body 1, and the fixing frame 16 is used for fixing the hopper 14.
Preferably, the lower grinding disc 4 is provided with a plurality of first through holes 17, the outer wall surface of the lower grinding disc 4 is provided with a first latch 18, the upper grinding disc 8 is provided with a plurality of second through holes 19, and the outer wall surface of the upper grinding disc 8 is provided with a second latch 20.
Preferably, the first latch 18 is engaged with one of the first gears 12 of the two first gears 12.
14 the second latch 20 is in engagement with the second gear wheel 13.
14 upper grinding disc 8 up end installs first spacing strip 21 and second spacing strip 22, and first spacing strip 21 and second spacing strip 22 are used for spacing the lower extreme of hopper 14, prevent that the quartz sand from scattering to everywhere when falling from hopper 14.
14 a protective cover 23 is mounted on the outer side of the rotating electric machine 9, and the protective cover 23 is used for protecting the rotating electric machine 9.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (10)
1. A grinding device machine for quartz sand comprises a machine body (1), and is characterized in that a grinding structure is arranged on the machine body (1);
the abrasive structure includes: the device comprises a driving part, a first rotating shaft (2), a receiving disc (3) and a grinding part;
the grinding machine is characterized in that the driving portion is arranged on the machine body (1), the first rotating shaft (2) is arranged at the lower end of the machine body (1) through a first bearing, the material receiving disc (3) penetrates through the first rotating shaft (2) to be arranged at the lower end of the machine body (1), and the grinding portion is fixedly arranged on the first rotating shaft (2) and movably connected to the driving portion.
2. The quartz sand grinding apparatus according to claim 1, wherein the grinding part comprises: the grinding device comprises a lower grinding disc (4), a grinding table (5), two second bearings (6), a second rotating shaft (7), an upper grinding disc (8) and a feeding assembly;
the lower grinding disc (4) is fixed on the first rotating shaft (2), the grinding table (5) is fixed on the lower grinding disc (4), the two second bearings (6) are respectively arranged at the upper end inside the machine body (1) and on the grinding table (5), the two ends of the second rotating shaft (7) are respectively fixed on the two second bearings (6), the upper grinding disc (8) is fixed on the second rotating shaft (7), and the feeding assembly is arranged at the upper end of the machine body (1).
3. The quartz sand grinding apparatus according to claim 1, wherein the driving part comprises: a rotating motor (9), a third bearing (10), a third rotating shaft (11), two first gears (12) and a second gear (13);
the rotating motor (9) is arranged on the left side of the machine body (1), the third bearing (10) is arranged on the upper end of the left side of the machine body (1), two ends of the third rotating shaft (11) are respectively fixed to the driving end of the rotating motor (9) and the third bearing (10), the two first gears (12) are respectively sleeved on the third rotating shaft (11), the second gear (13) is arranged on the upper end of the inner portion of the machine body (1) through the fourth bearing, and the second gear (13) is meshed with one of the two first gears (12) of the first gears (12).
4. The quartz sand grinding apparatus of claim 2, wherein the loading assembly comprises: a hopper (14) and a control valve (15);
the hopper (14) penetrates through the upper end of the machine body (1), and the control valve (15) is arranged at the lower end of the hopper (14).
5. A quartz sand grinding device machine according to claim 4, characterized in that a stabilizing frame (16) is installed at the connection of the hopper (14) and the machine body (1).
6. The quartz sand grinding machine according to claim 2, wherein the lower grinding disc (4) is provided with a plurality of first through holes (17), the outer wall surface of the lower grinding disc (4) is provided with a first latch (18), the upper grinding disc (8) is provided with a plurality of second through holes (19), and the outer wall surface of the upper grinding disc (8) is provided with a second latch (20).
7. A quartz sand grinding apparatus according to claim 6, wherein said first latch (18) is intermeshed with one (12) of said first gears (12).
8. A quartz sand grinding apparatus according to claim 6, wherein said second latch (20) is engaged with said second gear (13).
9. A quartz sand grinder as claimed in claim 2, wherein said upper grinding disk (8) is provided with a first stop strip (21) and a second stop strip (22) on its upper end surface.
10. A quartz sand grinding apparatus according to claim 3, wherein a protective cover (23) is attached to the outside of said rotating electric machine (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410782.1A CN111530555A (en) | 2020-05-15 | 2020-05-15 | Grinding device machine for quartz sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410782.1A CN111530555A (en) | 2020-05-15 | 2020-05-15 | Grinding device machine for quartz sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111530555A true CN111530555A (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010410782.1A Pending CN111530555A (en) | 2020-05-15 | 2020-05-15 | Grinding device machine for quartz sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111530555A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112044521A (en) * | 2020-08-26 | 2020-12-08 | 邵阳县神山综合开发实业有限公司 | Rapeseed oil processing equipment |
| CN112553939A (en) * | 2020-12-11 | 2021-03-26 | 江门市新会中新造纸网厂有限公司 | Grinding disc for papermaking |
| CN112718107A (en) * | 2020-12-19 | 2021-04-30 | 安徽儒特实业有限公司 | Multifunctional grinding equipment for pharmacy and use method thereof |
| CN112742566A (en) * | 2020-12-22 | 2021-05-04 | 绩溪智旭智能化技术开发有限公司 | Traditional chinese medicine grinding robot based on thing networking |
| CN113145225A (en) * | 2021-03-01 | 2021-07-23 | 江苏新达石英有限公司 | Quartz sand grinding equipment capable of reducing grinding plate loss and working method thereof |
| CN116764743A (en) * | 2023-08-17 | 2023-09-19 | 哈尔滨瀚邦医疗科技有限公司 | Pharmaceutical powder grinding device and grinding method |
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| CN104841511A (en) * | 2015-04-14 | 2015-08-19 | 屈松杰 | Electric Chinese medical stone mill |
| CN207385590U (en) * | 2017-09-05 | 2018-05-22 | 浙江中兴粮油有限公司 | A kind of brown rice milling device |
| CN109499674A (en) * | 2018-09-28 | 2019-03-22 | 河南格皓特农业科技有限公司 | A kind of Wheat Production that grinding effect is good processing grinding device |
| CN208912194U (en) * | 2018-09-30 | 2019-05-31 | 深圳市恒荣晟电子有限公司 | A kind of PCB resin slicer grinder |
| CN209020478U (en) * | 2018-08-03 | 2019-06-25 | 南通瑞隆新材料有限公司 | It is a kind of for grinding the grinder of graphite powder |
| CN210159659U (en) * | 2019-05-30 | 2020-03-20 | 连云港晶沁石英制品有限公司 | Milling equipment is used in fused quartz manufacturing |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104841511A (en) * | 2015-04-14 | 2015-08-19 | 屈松杰 | Electric Chinese medical stone mill |
| CN207385590U (en) * | 2017-09-05 | 2018-05-22 | 浙江中兴粮油有限公司 | A kind of brown rice milling device |
| CN209020478U (en) * | 2018-08-03 | 2019-06-25 | 南通瑞隆新材料有限公司 | It is a kind of for grinding the grinder of graphite powder |
| CN109499674A (en) * | 2018-09-28 | 2019-03-22 | 河南格皓特农业科技有限公司 | A kind of Wheat Production that grinding effect is good processing grinding device |
| CN208912194U (en) * | 2018-09-30 | 2019-05-31 | 深圳市恒荣晟电子有限公司 | A kind of PCB resin slicer grinder |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112044521A (en) * | 2020-08-26 | 2020-12-08 | 邵阳县神山综合开发实业有限公司 | Rapeseed oil processing equipment |
| CN112553939A (en) * | 2020-12-11 | 2021-03-26 | 江门市新会中新造纸网厂有限公司 | Grinding disc for papermaking |
| CN112718107A (en) * | 2020-12-19 | 2021-04-30 | 安徽儒特实业有限公司 | Multifunctional grinding equipment for pharmacy and use method thereof |
| CN112742566A (en) * | 2020-12-22 | 2021-05-04 | 绩溪智旭智能化技术开发有限公司 | Traditional chinese medicine grinding robot based on thing networking |
| CN112742566B (en) * | 2020-12-22 | 2022-10-25 | 嘉兴东方国药饮片股份有限公司 | Traditional chinese medicine grinding robot based on thing networking |
| CN113145225A (en) * | 2021-03-01 | 2021-07-23 | 江苏新达石英有限公司 | Quartz sand grinding equipment capable of reducing grinding plate loss and working method thereof |
| CN113145225B (en) * | 2021-03-01 | 2023-09-26 | 江苏新达石英有限公司 | Quartz sand grinding equipment capable of reducing grinding disc loss and working method thereof |
| CN116764743A (en) * | 2023-08-17 | 2023-09-19 | 哈尔滨瀚邦医疗科技有限公司 | Pharmaceutical powder grinding device and grinding method |
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Application publication date: 20200814 |
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