CN116460281A - Automatic pouring device for nodular cast iron well lid - Google Patents
Automatic pouring device for nodular cast iron well lid Download PDFInfo
- Publication number
- CN116460281A CN116460281A CN202310252301.2A CN202310252301A CN116460281A CN 116460281 A CN116460281 A CN 116460281A CN 202310252301 A CN202310252301 A CN 202310252301A CN 116460281 A CN116460281 A CN 116460281A
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- CN
- China
- Prior art keywords
- pouring
- pipe
- cast iron
- storage box
- fixedly provided
- 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.)
- Withdrawn
Links
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
- B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D33/00—Equipment for handling moulds
- B22D33/02—Turning or transposing moulds
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The invention relates to the technical field of well lid production, and discloses an automatic pouring device for a nodular cast iron well lid, which comprises a conveying frame, wherein a conveying belt is arranged in the conveying frame, and a pouring die is arranged on the surface of the conveying belt; the top of the conveying frame is provided with a storage box, the side wall of the storage box is fixedly provided with a feeding pipe, the bottom of the storage box is fixedly provided with a supporting rod, the lower end of the supporting rod is fixedly connected with the top of the conveying frame, the center of the bottom of the storage box is fixedly provided with a first pouring pipe, the lower end of the first pouring pipe is fixedly provided with a connecting pipe, and the lower end of the connecting pipe is fixedly provided with a second pouring pipe; the bottom both sides of storage case are all fixed and are equipped with the cylinder, and the piston rod end of two cylinders is fixed jointly and is equipped with the push plate. This an automatic pouring device for nodular cast iron well lid can insert the pouring pipe inside the pouring gate of mould, can avoid pouring liquid to spill the phenomenon, has improved the production efficiency of nodular cast iron well lid.
Description
Technical Field
The invention relates to the technical field of well lid production, in particular to an automatic pouring device for a nodular cast iron well lid.
Background
The main casting material of the iron well cover is ball-cast iron with the general QT500-7, and the ball-cast iron well cover is widely applied to various parks such as municipal roads, highways, communication, electric power, tap water, communities, schools and the like.
The utility model discloses a nodular cast iron well lid pouring device, including the pouring platform, the horizontal movable mounting in pouring platform up end center has the pouring conveyer belt, two sets of cylinders are installed respectively to pouring conveyer belt medial surface both sides, two sets of the cylinder lateral surface coaxial arrangement respectively has two sets of motors, and two sets of motor leading flank center pivot run through respectively in two sets of cylinder centers inside, equidistant movable mounting of pouring conveyer belt up end has a plurality of groups pouring moulds, two sets of pouring brackets are installed respectively in the middle of the both sides face around the pouring conveyer belt, two sets of pouring bracket medial surface fixed mounting has the pouring hopper, terminal surface movable mounting has the pouring mouth under the pouring hopper.
In the scheme, the pouring hopper and the pouring opening are adopted to pour raw materials into the pouring opening of the die, the die is transported on the conveyor belt, pouring operation can be completed when the die moves to the lower part of the pouring opening, but a certain distance is found between the pouring opening and the die in the actual use process, and the phenomenon of pouring liquid leakage is easily caused, so that raw materials are wasted. For this purpose, an automatic casting device for spheroidal graphite cast iron manhole covers is proposed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an automatic pouring device for a spheroidal graphite cast iron well lid, which can insert a pouring pipe into the pouring opening of a die, can avoid the phenomenon of pouring liquid leakage, improves the production efficiency of the spheroidal graphite cast iron well lid, and solves the problem that the pouring liquid leakage occurs in the existing scheme to cause raw material waste.
In order to achieve the above purpose, the present invention provides the following technical solutions: an automatic pouring device for a nodular cast iron well lid comprises a conveying frame, wherein a conveying belt is arranged in the conveying frame, and a pouring die is placed on the surface of the conveying belt;
the top of the conveying frame is provided with a storage box, the side wall of the storage box is fixedly provided with a feeding pipe, the bottom of the storage box is fixedly provided with a supporting rod, the lower end of the supporting rod is fixedly connected with the top of the conveying frame, the center of the bottom of the storage box is fixedly provided with a first pouring pipe, the lower end of the first pouring pipe is fixedly provided with a connecting pipe, and the lower end of the connecting pipe is fixedly provided with a second pouring pipe;
the two sides of the bottom of the storage box are fixedly provided with air cylinders, the tail ends of piston rods of the two air cylinders are fixedly provided with pushing plates together, and the pipe wall of the second pouring pipe is fixedly arranged in the middle of the pushing plates;
the inside of storage box is fixed and is equipped with the collecting hopper, the bottom of collecting hopper is equipped with the discharge gate, and the inside of discharge gate is equipped with the shutoff piece, the upper end of first pouring tube is fixed and is equipped with the receiving hopper, the fixed connecting rod that is equipped with in top of shutoff piece, and be equipped with elastic mechanism between the top of connecting rod and the top of storage box, the fixed arm-tie that is equipped with in bottom of shutoff piece, the upper surface both sides of impeller are all fixed and are equipped with the pull rod, two the upper end of pull rod extends to the both sides of arm-tie respectively, and the upper end of two pull rods is all fixed and is equipped with the pull piece, the pull piece is aligned with the arm-tie position and is set up.
Further preferably, the elastic mechanism comprises two slide bars, a slide block and a spring, the two slide bars are symmetrically and fixedly arranged on the inner wall of the top of the storage box, the slide block is slidably arranged between the two slide bars, one end of the spring is fixedly connected with the top of the slide block, the other end of the spring is fixedly connected with the inner wall of the top of the storage box, and the upper end of the connecting rod is fixedly connected with the bottom of the slide block.
Further preferably, the lower ends of the two sliding rods are fixedly provided with anti-falling stop blocks for limiting the sliding blocks.
Further preferably, the plugging block is a truncated cone-shaped block, and the discharge port is an opening matched with the side wall of the plugging block.
Further preferably, the two sides of the supporting rod are provided with timing control switches fixedly on the rod walls, and the timing control switches are electrically connected with the air cylinders through controllers.
Further preferably, the connecting pipe is a metal bellows.
Further preferably, the storage box is formed by welding a stainless steel metal heat-insulating plate.
Further preferably, a plurality of evenly distributed weeping holes are formed in the upper surface of the pulling plate.
Compared with the prior art, the invention provides an automatic pouring device for a nodular cast iron well lid, which has the following beneficial effects:
1. this an automatic pouring device for nodular cast iron well lid, through the storage case that is equipped with, first pouring pipe, connecting pipe, second pouring pipe, cylinder and pushing plate, the cylinder is when stretching out the action, can make the pushing plate move down, and the pushing plate can promote the second pouring pipe and move down for take place to remove and tensile connecting pipe between second pouring pipe and the first pouring pipe, can insert the second pouring pipe at the pouring gate inside of casting mould this moment, effectively avoid pouring in-process liquid to spill the phenomenon.
2. This an automatic pouring device for nodular cast iron well lid, through the arm-tie that is equipped with, pull rod and pull block, the promotion board is when being pushed down, can make pull rod and pull block by the downward pulling for the both sides of pull block pulling arm-tie because the arm-tie is connected with the shutoff piece can make the shutoff piece shift out from the inside of discharge gate, and the inside liquid of collecting hopper then can flow out and collect in the inside of receiving hopper this moment, and liquid is poured into in casting die's inside along first pouring tube, connecting pipe and second pouring tube.
3. This an automatic pouring device for nodular cast iron well lid, through slide bar, slider and the spring that is equipped with, when the promotion board was upwards promoted by the cylinder, the piece can be separated with the arm-tie this moment, and the spring can apply elasticity for the slider passes through the connecting rod upwards pulling shutoff piece, thereby can make the shutoff piece block up the discharge gate, avoids the inside liquid of collecting hopper to spill.
Drawings
FIG. 1 is a schematic diagram of an automatic casting device for a well lid of spheroidal graphite cast iron;
FIG. 2 is a schematic view of the internal structure of the tank of FIG. 1;
FIG. 3 is an enlarged view of the portion A of FIG. 2;
fig. 4 is a top view of the closure plate and pulling plate of fig. 2.
In the figure: 1. a carriage; 2. a conveyor belt; 3. casting a mold; 4. a storage bin; 5. a support rod; 6. a first pour tube; 7. a connecting pipe; 8. a second pouring tube; 9. a cylinder; 10. a pushing plate; 11. a collecting hopper; 12. a block; 13. a connecting rod; 14. a receiving hopper; 15. pulling a plate; 16. a pull rod; 17. pulling blocks; 18. a feed pipe; 19. a slide bar; 20. a slide block; 21. a spring; 22. an anti-falling stop block; 23. a timing control switch; 24. and a liquid leakage hole.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, an automatic pouring device for a spheroidal graphite cast iron well lid comprises a conveying frame 1, wherein a conveying belt 2 is arranged in the conveying frame 1, a pouring die 3 is arranged on the surface of the conveying belt 2, the pouring die 3 passes through, and the conveying belt 2 carries out distance conveying; the top of the conveying frame 1 is provided with a storage box 4, the side wall of the storage box 4 is fixedly provided with a feed pipe 18, the storage box 4 is formed by welding stainless steel metal heat-insulating plates, and the heat-insulating effect of the storage box 4 on casting liquid can be improved; the bottom of the storage box 4 is fixedly provided with a supporting rod 5, the lower end of the supporting rod 5 is fixedly connected with the top of the conveying frame 1, a first pouring pipe 6 is fixedly arranged at the center of the bottom of the storage box 4, a connecting pipe 7 is fixedly arranged at the lower end of the first pouring pipe 6, a second pouring pipe 8 is fixedly arranged at the lower end of the connecting pipe 7, and the connecting pipe 7 is a metal corrugated pipe; the cylinder 9 is fixed to both sides of the bottom of the storage box 4, the pushing plates 10 are fixed to the tail ends of piston rods of the two cylinders 9 together, the pipe wall of the second pouring pipe 8 is fixedly arranged in the middle of the pushing plates 10, the rod walls of the support rods 5 on both sides are fixedly provided with the timing control switch 23, the timing control switch 23 is electrically connected with the cylinder 9 through a controller, the timing control switch 23 can control the upward extending time length of the cylinder 9, accordingly, the amount of liquid to be discharged can be ensured, the pushing plates 10 can be enabled to move downwards when the cylinder 9 extends, the pushing plates 10 can push the second pouring pipe 8 to move downwards, the connecting pipe 7 is enabled to move and stretch between the second pouring pipe 8 and the first pouring pipe 6 until the second pouring pipe 8 is inserted into a pouring opening of the pouring mold 3, and the phenomenon that liquid leaks in the pouring process is effectively avoided.
The inside of storage box 4 is fixed and is equipped with collecting hopper 11, the bottom of collecting hopper 11 is equipped with the discharge gate, and the inside of discharge gate is equipped with shutoff piece 12, shutoff piece 12 adopts round platform shape piece, the discharge gate adopts with the lateral wall assorted opening of shutoff piece 12, the fixed hopper 14 that connects that is equipped with of upper end of first pouring tube 6, the fixed connecting rod 13 that is equipped with in top of shutoff piece 12, and be equipped with elastic mechanism between the upper end of connecting rod 13 and the top of storage box 4, elastic mechanism includes two slide bars 19, slider 20 and spring 21, two slide bars 19 are the symmetry fixed setting on the top inner wall of storage box 4, slider 20 slides and sets up between two slide bars 19, the one end of spring 21 and the top fixed connection of slider 20, and the other end of spring 21 and the top inner wall fixed connection of storage box 4, the upper end of connecting rod 13 and the bottom fixed connection of slider 20, the lower extreme of two slide bars 19 is all fixed and is equipped with the anti-drop dog 22 spacing with slider 20, the bottom fixed of shutoff piece 12 is equipped with arm-tie 15, a plurality of evenly distributed drain holes 24 have been seted up on the upper surface of arm-tie 15, can guarantee that the pouring spout is permeated to the inside of two slide bars 16, can flow into the top wall 16 through the slider 16, and the fixed position of the slider 16 is equipped with two slide bars 16, when the plug 16 is equipped with the top of the slider 16, and the plug 16 can be stretched out to the both sides, and the plug 16 can be fixed through the fixed position of the top of the slider 16, and the plug 16, and can be stretched out through the top of the plug plate 16, and the plug is made and the plug 16, and can be connected.
In summary, this automatic pouring device for spheroidal graphite cast iron well lid, when using, the staff pours the pouring liquid from inlet pipe 18 into the inside of storage case 4 at first and stores, then put pouring mould 3 on the surface of conveyer belt 2, carry pouring mould 3 to the below of storage case 4 and with second pouring tube 8 position alignment through conveyer belt 2, open cylinder 9 work at this moment, cylinder 9 can make push plate 10 move down when stretching out the action, push plate 10 can promote second pouring tube 8 and move down, make second pouring tube 8 take place to move and stretch connecting pipe 7 with first pouring tube 6, until second pouring tube 8 inserts in the pouring orifice inside of pouring mould 3, effectively avoid the phenomenon that liquid spills in the pouring process, push plate 10 when being pushed down, can make pull rod 16 and pull block 17 pulled down, make pull block 17 pull both sides of pull plate 15, because pull plate 15 and shutoff piece 12 are connected, can make shutoff piece 12 remove from the inside of the discharge orifice, pouring hopper 11 flow out and liquid then collect in the inside of pouring hopper and connect pipe 7 with second pouring tube 7, pouring tube 7 is poured into inside of pouring tube 3; when the pushing plate 10 is pushed upwards by the air cylinder to 9, the pull block 17 is separated from the pull plate 15 at this time, the spring 21 can apply elasticity to the sliding block 20, so that the sliding block 20 can pull the blocking block 12 upwards through the connecting rod 13, and the blocking block 12 can block a discharge hole, so that liquid in the collecting hopper 11 is prevented from leaking, and the pouring operation of pouring liquid is stopped at this time.
It should be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An automatic pouring device for a nodular cast iron well lid, comprises a conveying frame (1), and is characterized in that: a conveying belt (2) is arranged in the conveying frame (1), and a casting mold (3) is arranged on the surface of the conveying belt (2);
the top of the conveying frame (1) is provided with a storage box (4), the side wall of the storage box (4) is fixedly provided with a feeding pipe (18), the bottom of the storage box (4) is fixedly provided with a supporting rod (5), the lower end of the supporting rod (5) is fixedly connected with the top of the conveying frame (1), the center of the bottom of the storage box (4) is fixedly provided with a first pouring pipe (6), the lower end of the first pouring pipe (6) is fixedly provided with a connecting pipe (7), and the lower end of the connecting pipe (7) is fixedly provided with a second pouring pipe (8);
the two sides of the bottom of the storage box (4) are fixedly provided with air cylinders (9), the tail ends of piston rods of the two air cylinders (9) are fixedly provided with pushing plates (10) together, and the pipe wall of the second pouring pipe (8) is fixedly arranged in the middle of the pushing plates (10);
the inside of storage case (4) is fixed and is equipped with collecting hopper (11), the bottom of collecting hopper (11) is equipped with the discharge gate, and the inside of discharge gate is equipped with shutoff piece (12), the upper end of first pouring pipe (6) is fixed and is equipped with connects hopper (14), the fixed connecting rod (13) that is equipped with in top of shutoff piece (12), and be equipped with elastic mechanism between the upper end of connecting rod (13) and the top of storage case (4), the fixed arm-tie (15) that are equipped with in bottom of shutoff piece (12), the upper surface both sides of pushing plate (10) are all fixed and are equipped with pull rod (16), two the upper end of pull rod (16) extends to the both sides of arm-tie (15) respectively, and the upper end of two pull rods (16) is all fixed and is equipped with pull block (17), pull block (17) and arm-tie (15) position alignment setting.
2. An automatic casting device for spheroidal graphite cast iron well covers according to claim 1, wherein: the elastic mechanism comprises two slide bars (19), a slide block (20) and a spring (21), wherein the two slide bars (19) are symmetrically and fixedly arranged on the inner wall of the top of the storage box (4), the slide block (20) is slidably arranged between the two slide bars (19), one end of the spring (21) is fixedly connected with the top of the slide block (20), the other end of the spring (21) is fixedly connected with the inner wall of the top of the storage box (4), and the upper end of the connecting rod (13) is fixedly connected with the bottom of the slide block (20).
3. An automatic casting device for spheroidal graphite cast iron well covers according to claim 2, wherein: the lower ends of the two sliding rods (19) are fixedly provided with anti-falling stop blocks (22) for limiting the sliding blocks (20).
4. An automatic casting device for spheroidal graphite cast iron well covers according to claim 1, wherein: the plugging block (12) is a truncated cone-shaped block, and the discharge port is an opening matched with the side wall of the plugging block (12).
5. An automatic casting device for spheroidal graphite cast iron well covers according to claim 1, wherein: the two sides of the supporting rod (5) are respectively and fixedly provided with a timing control switch (23), and the timing control switches (23) are electrically connected with the air cylinder (9) through a controller.
6. An automatic casting device for spheroidal graphite cast iron well covers according to claim 1, wherein: the connecting pipe (7) is a metal corrugated pipe.
7. An automatic casting device for spheroidal graphite cast iron well covers according to claim 1, wherein: the storage box (4) is formed by welding stainless steel metal heat-insulating plates.
8. An automatic casting device for spheroidal graphite cast iron well covers according to claim 1, wherein: the upper surface of the pull plate (15) is provided with a plurality of evenly distributed liquid leakage holes (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310252301.2A CN116460281A (en) | 2023-03-16 | 2023-03-16 | Automatic pouring device for nodular cast iron well lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310252301.2A CN116460281A (en) | 2023-03-16 | 2023-03-16 | Automatic pouring device for nodular cast iron well lid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116460281A true CN116460281A (en) | 2023-07-21 |
Family
ID=87184839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310252301.2A Withdrawn CN116460281A (en) | 2023-03-16 | 2023-03-16 | Automatic pouring device for nodular cast iron well lid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116460281A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116984568A (en) * | 2023-09-26 | 2023-11-03 | 鸡泽县金诚精密铸造有限公司 | Mould is used in nodular cast iron well lid manufacturing |
| CN118455486A (en) * | 2024-07-12 | 2024-08-09 | 大连亚明汽车部件股份有限公司 | A high-precision automotive metal bracket die-casting equipment |
-
2023
- 2023-03-16 CN CN202310252301.2A patent/CN116460281A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116984568A (en) * | 2023-09-26 | 2023-11-03 | 鸡泽县金诚精密铸造有限公司 | Mould is used in nodular cast iron well lid manufacturing |
| CN116984568B (en) * | 2023-09-26 | 2023-12-01 | 鸡泽县金诚精密铸造有限公司 | Mould is used in nodular cast iron well lid manufacturing |
| CN118455486A (en) * | 2024-07-12 | 2024-08-09 | 大连亚明汽车部件股份有限公司 | A high-precision automotive metal bracket die-casting equipment |
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| 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230721 |
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| WW01 | Invention patent application withdrawn after publication |