CN113664146A - Molding sand screening and cleaning device for well lid casting - Google Patents
Molding sand screening and cleaning device for well lid casting Download PDFInfo
- Publication number
- CN113664146A CN113664146A CN202110902484.9A CN202110902484A CN113664146A CN 113664146 A CN113664146 A CN 113664146A CN 202110902484 A CN202110902484 A CN 202110902484A CN 113664146 A CN113664146 A CN 113664146A
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- cleaning device
- wall
- well lid
- molding sand
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- 238000012216 screening Methods 0.000 title claims abstract description 118
- 238000004140 cleaning Methods 0.000 title claims abstract description 61
- 238000005266 casting Methods 0.000 title claims abstract description 47
- 239000003110 molding sand Substances 0.000 title claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 230000003028 elevating effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 20
- 239000012535 impurity Substances 0.000 description 12
- 238000013016 damping Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007528 sand casting Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/06—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sieving or magnetic separating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
- B08B9/0808—Cleaning containers having tubular shape, e.g. casks, barrels, drums by methods involving the use of tools, e.g. by brushes, scrapers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention relates to a molding sand screening and cleaning device for well lid casting, which belongs to the technical field of casting sand processing equipment and comprises an operation table, wherein lifting devices are symmetrically arranged on the end surface of the top of the operation table, a screening box is arranged above the operation table, a fixing plate is arranged above the screening box, and a cleaning device is arranged between the fixing plate and the screening box; according to the invention, the lifting device is arranged, the speed of the bevel gear is adjusted by using the speed adjusting motor, so that the lifting height of the lifting rod is adjusted, the height of the cleaning device can be adjusted in real time, the cleaning efficiency of the cleaning device on the inner wall of the screening barrel is increased, the cleaning device is arranged, the driving motor is used for driving the rotary table to rotate, and the inner wall of the screening barrel is cleaned by the brush on the cleaning plate after the cleaning plate falls into the screening box, so that the cleaning effect of the screening barrel is better.
Description
Technical Field
The invention belongs to the technical field of casting sand processing equipment, and relates to a molding sand screening and cleaning device for well lid casting.
Background
The well lid casting processing field can often adopt the sand casting, and the material of sand casting is simple cheap, and casting effect is good, and simple process easily operates, is the mainstream technology in well lid casting processing field always, and the basic raw materials of sand casting are casting sand and sand type binder, only wherein casting sand need sieve before using, sieves out the bold granule and the metal granule in the casting sand.
Present similar casting sand screening cleaning device is when using, adopts artifical manual filling in batches casting sand to sieve basket inside usually, leads to impurity to remain on the sieve basket inner wall, is difficult to the clearance.
Disclosure of Invention
The invention aims to provide a molding sand screening and cleaning device for well lid casting.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a well lid casting is with molding sand screening cleaning device, includes the operation panel, operation panel top terminal surface symmetry is provided with elevating gear, the operation panel top is provided with the screening case, screening case top is provided with the fixed plate, be provided with cleaning device between fixed plate and the screening case.
As a preferred technical scheme of the sand screening and cleaning device for well lid casting, the lifting device comprises a fixed column, the outer end face of the bottom of the fixed column is fixedly connected with an operation table, a lifting rod is movably arranged in the fixed column, one end of the lifting rod extends out of the upper portion of the fixed column, a plurality of conical tooth blocks are arranged on one side wall of the lifting rod, which is located in the fixed column, the inner wall of the fixed column is located behind the lifting rod, a speed regulating motor is installed on the rear side of the lifting rod through a motor installation seat, a conical gear is sleeved on an output shaft of the speed regulating motor, and the conical gear is meshed with the conical tooth blocks.
According to the preferable technical scheme of the molding sand screening and cleaning device for well lid casting, the front inner side wall and the rear inner side wall of the fixed column are fixedly provided with the fixed blocks, and the two side walls of the lifting rod are in sliding connection with the fixed blocks.
According to the preferable technical scheme of the sand screening and cleaning device for well lid casting, two ends of the fixed plate are fixedly connected with two side walls of the lifting rod, the cleaning device comprises a rotary table, a driving motor is mounted on the end surface of the top of the fixed plate through a motor mounting seat, an output shaft of the driving motor penetrates through the lower portion of the fixed plate and is fixedly connected with the rotary table, a plurality of cleaning plates are fixedly connected onto the side walls of the rotary table, the overlooking cross sections of the cleaning plates are of arc structures, and a brush is mounted on one end surface, far away from the rotary table, of each cleaning plate.
According to the preferable technical scheme of the molding sand screening and cleaning device for well lid casting, the screening box is of a hollow structure, the screening barrel is movably arranged inside the screening box, the cross section of the screening barrel is of a circular structure, a plurality of filtering holes are formed in the bottom of the screening barrel, and a plurality of damping mechanisms are arranged between the screening barrel and the inner wall of the screening box.
According to the preferable technical scheme of the molding sand screening and cleaning device for well lid casting, the damping mechanism comprises a connecting rod, one end of the connecting rod is fixedly connected with the side wall of the screening barrel, a plurality of grooves are formed in the inner wall of the screening box corresponding to the connecting rod, the other end of the connecting rod extends into the grooves, and springs are fixedly arranged in the grooves.
According to the preferable technical scheme of the molding sand screening and cleaning device for well lid casting, the two side walls of one end, located in the groove, of the connecting rod are symmetrically and fixedly connected with the sliding blocks, the sliding grooves are formed in the positions, corresponding to the sliding blocks, of the inner wall of the groove, and the sliding blocks are connected with the sliding grooves in a sliding mode.
According to the preferable technical scheme of the molding sand screening and cleaning device for well lid casting, a vibrating motor is fixedly arranged on the outer side wall of the screening box.
According to the preferable technical scheme of the molding sand screening and cleaning device for well lid casting, the outer walls of the two sides of the screening box are symmetrically and rotatably connected with the electric rotating shafts, one ends of the two electric rotating shafts, which are far away from the screening box, are rotatably connected with the fixed column, and the joint of the two electric rotating shafts is provided with the bearing.
According to the preferable technical scheme of the sand screening and cleaning device for well lid casting, a collecting box is movably arranged on the end face of the top of an operating platform in a penetrating mode and corresponds to the lower portion of a screening box, a channel is formed in the operating platform, a jacking spring is fixedly arranged in the channel, an ejector rod is fixedly connected to one end, away from the inner wall of the channel, of the jacking spring, a first clamping groove is formed in the front side wall of the collecting box, the ejector rod is connected with the first clamping groove in a clamping mode, a clamping rod is fixedly connected to the rear side wall of the collecting box, located in the operating platform, of the inner wall of the operating platform, a second clamping groove is formed in the position, located in the clamping rod, of the inner wall of the operating platform, and the clamping rod is connected with the second clamping groove in a clamping mode.
The invention has the beneficial effects that:
(1) according to the invention, the lifting device is arranged, and the speed of the conical gear is adjusted by using the speed adjusting motor, so that the lifting height of the lifting rod is adjusted, the height of the cleaning device can be adjusted in real time, and the cleaning efficiency of the cleaning device on the inner wall of the screening barrel is increased.
(2) According to the invention, the cleaning device is arranged, the driving motor is used for driving the rotary table to rotate, and the hairbrush on the cleaning plate cleans the inner wall of the screening barrel after the cleaning plate falls into the screening box, so that the cleaning effect of the screening barrel is better.
(3) According to the invention, the vibration motor is used for generating vibration to the screening box by arranging the damping mechanism, so that the connecting rod moves back and forth in the groove, the shaking frequency is increased, and the screening effect of the casting sand is better.
(4) According to the invention, the clamping rod and the ejector rod are arranged, so that the collection box can be disassembled, the collection of casting sand and impurities can be exchanged, and the screening and cleaning efficiency of the casting sand is accelerated.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the construction of the screening box of the present invention;
FIG. 3 is a schematic view of the interior of the groove of the present invention;
FIG. 4 is a perspective view of a cleaning plate according to the present invention;
FIG. 5 is a schematic view of the interior of the fixing post in the front view;
FIG. 6 is a side view of the inner structure of the fixing post of the present invention;
FIG. 7 is a schematic view of the top view of the collection chamber of the present invention;
fig. 8 is a front view of the inside of the collecting box according to the present invention.
In the figure: 1. an operation table; 2. screening the box; 3. a fixing plate; 4. fixing a column; 5. a lifting rod; 6. a speed-regulating motor; 7. a fixed block; 8. a turntable; 9. a drive motor; 10. cleaning the plate; 11. a screening barrel; 12. a connecting rod; 13. a groove; 14. a slider; 15. a chute; 16. a vibration motor; 17. an electric rotating shaft; 18. a collection box; 19. a channel; 20. a top rod; 21. a first card slot; 22. a clamping rod; 23. and a second card slot.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1-8, the molding sand screening and cleaning device for well lid casting comprises an operation table 1, wherein lifting devices are symmetrically arranged on the top end face of the operation table 1, a screening box 2 is arranged above the operation table 1, a fixing plate 3 is arranged above the screening box 2, and a cleaning device is arranged between the fixing plate 3 and the screening box 2.
Specifically, elevating gear includes fixed column 4, 4 bottom outer terminal surfaces of fixed column and 1 fixed connection of operation panel, 4 inside activities of fixed column are provided with lifter 5, the one end of lifter 5 stretches out fixed column 4 top, lifter 5 is located and is provided with a plurality of toper tooth piece on 4 inside lateral walls of fixed column, 4 inner walls of fixed column are located 5 rear sides of lifter and install buncher 6 through the motor mount pad, the output shaft of buncher 6 has cup jointed conical gear, conical gear and toper tooth piece meshing.
Specifically, fixed block 7 is fixed to be equipped with on the inside wall around the fixed column 4, the both sides wall and the fixed block 7 sliding connection of lifter 5.
In this embodiment, sieve remaining impurity and large granule impurity and remain inside screening bucket 11, start buncher 6, buncher 6 output shaft rotates, through the meshing of toper tooth piece and conical gear, when lifter 5 descends, the both sides of lifter 5 slide on fixed block 7 to clean board 10 descends.
Specifically, the both ends of fixed plate 3 all with two 5 lateral wall fixed connection of lifter, cleaning device includes carousel 8, driving motor 9 is installed through the motor mount pad to 3 top terminal surfaces of fixed plate, driving motor 9's output shaft run through to 3 below of fixed plate and with 8 fixed connection of carousel, the clean board 10 of fixedly connected with a plurality of on the 8 lateral walls of carousel, the overlooking cross-section of clean board 10 is the arc structure, install the brush on the terminal surface that carousel 8 was kept away from to clean board 10.
In this embodiment, start driving motor 9, driving motor 9's output shaft all rotates, and inside cleaning plate 10 was put into screening case 2, the brush cleaned 2 inner walls of screening case on driving cleaning plate 10 when carousel 8 was rotatory, and the impurity after the cleanness remains at the terminal surface in screening case 2 bottom.
Specifically, screening case 2 is inside to be hollow structure, screening case 2 is inside activity to be provided with screening bucket 11, screening bucket 11's cross-section is circular structure, a plurality of filtration pore has been seted up to screening bucket 11 bottom, be provided with a plurality of damper between the inner wall of screening bucket 11 and screening case 2.
Specifically, damper includes connecting rod 12, the one end and the 11 lateral walls fixed connection of screening bucket of connecting rod 12, 2 inner walls of screening case correspond connecting rod 12 department and have seted up a plurality of recess 13, the other end of connecting rod 12 stretches into in the recess 13, recess 13 inside is fixed and is equipped with the spring.
Specifically, the connecting rod 12 is located symmetrical fixedly connected with slider 14 on the one end both sides wall in recess 13, recess 13 inner wall corresponds slider 14 department and has seted up spout 15, slider 14 and spout 15 sliding connection.
Specifically, a vibration motor 16 is fixedly arranged on the outer side wall of the screening box 2.
In this embodiment, pour into the casting sand that well lid casting was used from screening case 2 top, start vibrating motor 16, vibrating motor 16 produces the vibration to screening case 2, make screening bucket 11 shake, connecting rod 12 extrusion spring on the screening bucket 11 lateral wall, spring rebound extrusion force, when connecting rod 12 moves in recess 13 business turn over, slider 14 also moves back and forth in spout 15, make screening bucket 11 shake in screening case 2 and carry out the screening of casting sand, the casting sand that sieves out falls into in collecting box 18 through the filtration pore screening.
Specifically, screening case 2 both sides outer wall symmetry is rotated and is connected with electronic pivot 17, two the one end that screening case 2 was kept away from to electronic pivot 17 all rotates with fixed column 4 to be connected, and the junction is provided with the bearing.
In this embodiment, a new collection box 18 is loaded, and the electric rotating shaft 17 rotates to turn the sieving box 2 forward or backward, so that impurities are poured into the new collection box 18, thereby completing the impurity removal process.
Specifically, the top end face of the operating platform 1 is movably provided with a collecting box 18 corresponding to the lower portion of the screening box 2 in a penetrating mode, a channel 19 is formed in the operating platform 1, a jacking spring is fixedly arranged in the channel 19, one end, far away from the inner wall of the channel 19, of the jacking spring is fixedly connected with an ejector rod 20, the front side wall of the collecting box 18 is located in the operating platform 1 and provided with a first clamping groove 21, the ejector rod 20 is connected with the first clamping groove 21 in a clamping mode, the rear side wall of the collecting box 18 is located in the operating platform 1 and fixedly connected with a clamping rod 22, the inner wall of the operating platform 1 is located at the clamping rod 22 and provided with a second clamping groove 23, and the clamping rod 22 is connected with the second clamping groove 23 in a clamping mode.
In this embodiment, the driving motor 9 is then turned off, the speed-regulating motor 6 is adjusted, the lifting rod 5 is raised, the cleaning plate 10 is pulled away from the screening box 2, the collecting box 18 is pushed to the front side at the bottom, the clamping rod 22 is disengaged from the second clamping groove 23, the collecting box 18 is moved downwards, the ejector rod 20 is disengaged from the first clamping groove 21, and the collection box 18 is detached.
When the invention is used:
(1) pouring casting sand for well lid casting from the top of the screening box 2, starting the vibration motor 16, vibrating the screening box 2 by the vibration motor 16 to enable the screening barrel 11 to shake, enabling the connecting rod 12 on the side wall of the screening barrel 11 to extrude the spring, enabling the spring to rebound and extrude force, enabling the sliding block 14 to move back and forth in the sliding groove 15 when the connecting rod 12 moves in and out of the groove 13, enabling the screening barrel 11 to shake in the screening box 2 to screen the casting sand, and enabling the screened casting sand to fall into the collecting box 18 through a filtering hole;
(2) screening residual impurities and large-particle impurities to remain in a screening barrel 11, starting a speed regulating motor 6 and a driving motor 9, enabling output shafts of the speed regulating motor 6 and the driving motor 9 to rotate, enabling two sides of a lifting rod 5 to slide on a fixing block 7 when the lifting rod 5 descends through meshing of a conical tooth block and a conical gear, enabling a cleaning plate 10 to descend, enabling the cleaning plate 10 to be placed into a screening box 2, driving a brush on the cleaning plate 10 to clean the inner wall of the screening box 2 while a rotary table 8 rotates, and enabling the cleaned impurities to remain on the inner end face of the bottom of the screening box 2;
(3) then the driving motor 9 is turned off, the speed regulating motor 6 is adjusted to enable the lifting rod 5 to ascend, so that the cleaning plate 10 is pulled away from the screening box 2, the collecting box 18 is pushed to the front side at the bottom, the clamping rod 22 is separated from the second clamping groove 23, the collecting box 18 is moved downwards, the ejector rod 20 is separated from the first clamping groove 21, the collection box 18 is disassembled, then the new collecting box 18 is installed, the electric rotating shaft 17 rotates, the screening box 2 is turned forwards or backwards, impurities are poured into the new collecting box 18, and the impurity removing process is completed.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a well lid casting is with molding sand screening cleaning device, includes operation panel (1), its characterized in that: operating panel (1) top terminal surface symmetry is provided with elevating gear, operating panel (1) top is provided with screening case (2), screening case (2) top is provided with fixed plate (3), be provided with cleaning device between fixed plate (3) and screening case (2).
2. The molding sand screening and cleaning device for well lid casting of claim 1, wherein: the lifting device comprises a fixing column (4), the outer end face of the bottom of the fixing column (4) is fixedly connected with an operating platform (1), a lifting rod (5) is movably arranged inside the fixing column (4), one end of the lifting rod (5) extends out of the top of the fixing column (4), a plurality of conical tooth blocks are arranged on one side wall, located inside the fixing column (4), of the lifting rod (5), the inner wall of the fixing column (4) is located on the rear side of the lifting rod (5), a speed regulating motor (6) is installed through a motor installing seat, a conical gear is sleeved on an output shaft of the speed regulating motor (6), and the conical gear is meshed with the conical tooth blocks.
3. The molding sand screening and cleaning device for well lid casting of claim 2, characterized in that: fixed blocks (7) are fixedly arranged on the front inner side wall and the rear inner side wall of the fixed column (4), and two side walls of the lifting rod (5) are connected with the fixed blocks (7) in a sliding mode.
4. The molding sand screening and cleaning device for well lid casting of claim 2, characterized in that: the both ends of fixed plate (3) all with two lifter (5) lateral wall fixed connection, cleaning device includes carousel (8), driving motor (9) are installed through the motor mount pad to fixed plate (3) top terminal surface, the output shaft of driving motor (9) run through to fixed plate (3) below and with carousel (8) fixed connection, clean board (10) of fixedly connected with a plurality of on carousel (8) lateral wall, overlook the cross-section of clean board (10) and be the arc structure, install the brush on the terminal surface that carousel (8) were kept away from in clean board (10).
5. The molding sand screening and cleaning device for well lid casting of claim 1, wherein: screening case (2) is inside to be hollow structure, the inside activity of screening case (2) is provided with screening bucket (11), the cross-section of screening bucket (11) is circular structure, a plurality of filtration pore has been seted up to screening bucket (11) bottom, be provided with a plurality of damper between the inner wall of screening bucket (11) and screening case (2).
6. The molding sand screening and cleaning device for well lid casting of claim 5, wherein: damper includes connecting rod (12), the one end and screening bucket (11) lateral wall fixed connection of connecting rod (12), a plurality of recess (13) have been seted up to screening case (2) inner wall corresponding connecting rod (12) department, the other end of connecting rod (12) stretches into in recess (13), recess (13) inside is fixed and is equipped with the spring.
7. The molding sand screening and cleaning device for well lid casting of claim 6, wherein: connecting rod (12) are located symmetry fixedly connected with slider (14) on the one end both sides wall in recess (13), recess (13) inner wall corresponds slider (14) department and has seted up spout (15), slider (14) and spout (15) sliding connection.
8. The molding sand screening and cleaning device for well lid casting of claim 1, wherein: and a vibration motor (16) is fixedly arranged on the outer side wall of the screening box (2).
9. The molding sand screening and cleaning device for well lid casting of claim 2, characterized in that: screening case (2) both sides outer wall symmetry is rotated and is connected with electronic pivot (17), two the one end that screening case (2) were kept away from in electronic pivot (17) all rotates with fixed column (4) to be connected, and the junction is provided with the bearing.
10. The molding sand screening and cleaning device for well lid casting of claim 1, wherein: the top end face of the operating platform (1) corresponds to the screening box (2) and is movably provided with a collecting box (18) in a penetrating mode, a channel (19) is formed in the operating platform (1), a jacking spring is fixedly arranged in the channel (19), one end, far away from the inner wall of the channel (19), of the jacking spring is fixedly connected with an ejector rod (20), the front side wall of the collecting box (18) is located in the operating platform (1) and is provided with a first clamping groove (21), the ejector rod (20) is connected with the first clamping groove (21) in a clamping mode, the rear side wall of the collecting box (18) is located in the operating platform (1) and is fixedly connected with a clamping rod (22), the inner wall of the operating platform (1) is located in the clamping rod (22) and is provided with a second clamping groove (23), and the clamping rod (22) is connected with the second clamping groove (23) in a clamping mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110902484.9A CN113664146B (en) | 2021-08-06 | 2021-08-06 | Molding sand screening and cleaning device for well lid casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110902484.9A CN113664146B (en) | 2021-08-06 | 2021-08-06 | Molding sand screening and cleaning device for well lid casting |
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| CN113664146B CN113664146B (en) | 2023-08-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114082358A (en) * | 2021-11-23 | 2022-02-25 | 麻阳海创新材料有限责任公司 | A clearance system that is arranged in emulsion paint production to attach wall base-material |
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