CN116618613A - Casting device for low-pressure casting - Google Patents
Casting device for low-pressure casting Download PDFInfo
- Publication number
- CN116618613A CN116618613A CN202211225804.2A CN202211225804A CN116618613A CN 116618613 A CN116618613 A CN 116618613A CN 202211225804 A CN202211225804 A CN 202211225804A CN 116618613 A CN116618613 A CN 116618613A
- Authority
- CN
- China
- Prior art keywords
- fixed
- support column
- sliding block
- sliding
- mounting plate
- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000001125 extrusion Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 11
- 239000000498 cooling water Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 abstract description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile 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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model discloses a casting device for low-pressure casting, which comprises a support column, wherein the outer surface of the bottom end of the support column is slidably connected with a first limiting sliding sleeve, the top end of the first limiting sliding sleeve is fixedly provided with a placing platform, the bottom end of the placing platform is fixedly provided with a hydraulic cylinder, the top end of the placing platform is fixedly provided with a crucible, one end of the placing platform, which is far away from the crucible, is fixedly provided with an extrusion column, the inside of the crucible penetrates through and is fixedly provided with a riser tube, the left side of the top end of the crucible penetrates through and is fixedly provided with an air inlet tube, the outer surface of the middle part of the support column is fixedly provided with a sliding platform, and after molten metal is poured into a mould, the hydraulic cylinder, the placing platform, the extrusion column, a left mounting plate, a right mounting plate, a liquid lifting opening, a blocking piece, a second rack and a second gear are designed so that the liquid lifting opening can be closed through the blocking piece and then the left mounting plate is closed, thereby preventing the molten metal in the mould from flowing back, and the defect of the product can not occur.
Description
Technical Field
The utility model relates to the technical field of casting equipment, in particular to a casting device for low-pressure casting.
Background
The low-pressure casting machine is a general device for low-pressure casting of aluminum alloy, can be widely applied to production of aluminum alloy castings in automobiles, motorcycles, instruments, textile machinery and aerospace industry, and consists of a main machine, a hydraulic system, a molten pool type heat preservation furnace, a liquid level pressurizing device, an electric control system, a mold cooling system and the like which are arranged on a frame, a low-pressure casting mold is arranged on the low-pressure casting machine, a pouring gate of the low-pressure casting mold is positioned at the bottom of the mold and communicated with a smelting furnace arranged below the low-pressure casting mold through a liquid lifting pipe, aluminum alloy liquid in the smelting furnace is pressurized by the liquid level pressurizing device to enter a forming cavity in the mold through the liquid lifting pipe, and alloy liquid in the forming cavity is cooled by the cooling system to form a product and then taken out.
The utility model with the publication number of CN211052487U discloses a low-pressure casting device, which comprises a base, a crucible, a liquid lifting pipe, a connecting block and an automatic hydraulic rod, wherein the crucible is fixed on the surface of the base, the liquid lifting pipe is fixed on the upper surface of the base, a chute is formed in the base, the connecting block is arranged on the surface of the chute, a rotating shaft is arranged on the surface of the connecting block, a first spring is fixed on the surface of the connecting block, a blocking block is arranged on the surface of the rotating shaft, a protective layer is arranged on the upper surface of the blocking block, a second spring is fixed on the lower surface of the blocking block, a supporting rod is fixed on the upper surface of the base, the automatic hydraulic rod is welded on the lower surface of the supporting rod, and a fixing plate is fixed on the lower end of the automatic hydraulic rod. In the application, the metal liquid is introduced into the mold groove by the pressure of the pressing block in the using process, and the metal liquid can be caused to reflow into the crucible again in the separating process, so that the defect can occur in the product in the unfilled later stage.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a casting device for low-pressure casting, which solves the problems in the prior art. In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a casting device for low pressure casting, includes the support column, the bottom surface sliding connection of support column has first spacing sliding sleeve, the top of first spacing sliding sleeve is fixed with the place platform, the bottom mounting of place platform has the pneumatic cylinder, the top of place platform is fixed with the crucible, the one end that the crucible was kept away from to the place platform is fixed with the extrusion post, the inside of crucible runs through and is fixed with the stalk, the top left side of crucible runs through and is fixed with the intake pipe, the top right side of crucible runs through and is fixed with the outlet duct, the middle part external surface of support column is fixed with slide bracket, slide bracket's inside runs through and sliding connection has the mounting panel, the bottom mounting of mounting panel has first connecting rod, the bottom mounting of first connecting rod has the sliding block, slide bracket's top is fixed with the bottom plate, the top sliding connection of support column has the second spacing sliding sleeve, the external surface mounting of second spacing sliding sleeve has the fixed plate, the bottom mounting plate is fixed with the fixed block, the inside of second spacing sliding sleeve is fixed with first stalk, the right side is provided with the intake pipe, the right side is provided with the first rack and pinion, the inside is provided with the rack, the inside is provided with the connecting rod, the left side is fixed with the second rack, the outside is provided with the connecting rod.
Preferably, the mounting plate is divided into a left mounting plate and a right mounting plate, and the top ends of the right mounting plate and the left mounting plate are respectively fixed with a first spring, and the top ends of the first springs are fixed on the inner wall of the sliding platform.
Preferably, the sliding block is divided into a left sliding block and a right sliding block, and the bottom ends of the right sliding block and the left sliding block are fixed with a second spring.
Preferably, the bottom of the right sliding block and the bottom of the left sliding block, which are close to one end of each other, are provided with extrusion grooves, and the shape of each extrusion groove is the shape of the top end of each extrusion column.
Preferably, the first gear is meshed with the first rack, the second rack is meshed with the second gear, the internal transmission of the first gear is connected with a transmission belt, and the other end of the transmission belt is connected with the outer surface of the second gear in a transmission manner.
Preferably, the hydraulic rod penetrates through and is fixed on the right side wall of the water storage tank, and the movable plate is connected inside the water storage tank in a sliding mode.
Preferably, the number of the extrusion columns is two, and the two extrusion columns are uniformly distributed on the left side and the right side of the top end of the placement platform.
Preferably, the number of the first connecting rods is two, and the bottom ends of the left mounting plate and the right mounting plate are both fixed with the first connecting rods.
Preferably, the number of the limiting sliding grooves is two, and the inside of the limiting sliding groove is connected with a left sliding block and a right sliding block in a sliding manner.
The utility model provides a casting device for low-pressure casting. The beneficial effects are as follows:
(1) This a casting device for low pressure casting through pneumatic cylinder, place platform, extrusion post, left mounting panel, right mounting panel, rises liquid mouth, sprue, design of second rack and second gear can be earlier through the sprue with rise liquid mouth and close rethread left mounting panel and right mounting panel closure so that prevent that the molten metal in the mould can produce the backward flow and can not make the product defect appear after filling molten metal into the mould.
(2) This a casting device for low pressure casting is through pneumatic cylinder, hydraulic stem, movable plate, storage water tank, connecting water pipe and condenser tube's design when carrying out the infusion in the mould simultaneously to the outside condenser tube in pour into rivers and carry out quick cooling to the mould.
Drawings
FIG. 1 is a schematic view showing a casting apparatus for low-pressure casting according to the present utility model;
FIG. 2 is a schematic rear view of a casting apparatus for low pressure casting according to the present utility model;
FIG. 3 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;
FIG. 4 is an enlarged schematic view of the mounting plate of the present utility model;
fig. 5 is an enlarged schematic view of the sliding block according to the present utility model.
In the figure: 1. a support column; 2. a hydraulic cylinder; 3. the first limiting sliding sleeve; 4. placing a platform; 5. a crucible; 6. an extrusion column; 7. a lift tube; 8. an air inlet pipe; 9. an air outlet pipe; 10. a sliding platform; 11. a mounting plate; 12. a first connecting rod; 13. limiting sliding grooves; 14. a sliding block; 15. a bottom plate; 16. the second limiting sliding sleeve; 17. a fixing plate; 18. a fixed block; 19. a first rack; 20. a first gear; 21. a rotating handle; 22. a transmission belt; 23. a liquid lifting port; 24. blocking; 25. a second connecting rod; 26. a second rack; 27. a second gear; 28. a hydraulic rod; 29. a moving plate; 30. a water storage tank; 31. connecting a water pipe; 32. a cooling water pipe; 111. a right mounting plate; 112. a left mounting plate; 113. a first spring; 141. a right slider; 142. a left slider; 143. an extrusion groove; 144. and a second spring.
Detailed Description
The following description of the embodiments of the present utility model 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 utility model, but not all embodiments.
Referring to fig. 1-5, the present utility model provides a technical solution: the utility model provides a casting device for low pressure casting, including support column 1, the bottom surface sliding connection of support column 1 has first spacing sliding sleeve 3, the top of first spacing sliding sleeve 3 is fixed with platform 4, can control the reciprocates of platform 4 through first spacing sliding sleeve 3, the bottom mounting of platform 4 has pneumatic cylinder 2, the top of platform 4 is fixed with crucible 5, the one end that platform 4 kept away from crucible 5 is fixed with extrusion post 6, extrusion post 6 is totally two, and two extrusion posts 6 evenly distributed are in the left and right sides on platform 4 top, extrusion groove 143 has been seted up to the bottom that left sliding block 142 is close to each other one end with right sliding block 141, and the shape of extrusion groove 143 is the shape on extrusion post 6 top, can open the inside mounting panel 11 of sliding platform 10 through extrusion post 6 and be convenient for rise liquid, the inside of crucible 5 runs through and is fixed with lift pipe 7, the left side of the top end of the crucible 5 is penetrated and fixed with an air inlet pipe 8, the air pressure is increased to the inside of the crucible 5 through the air inlet pipe 8 so that internal molten metal can enter the die, the right side of the top end of the crucible 5 is penetrated and fixed with an air outlet pipe 9, the outer surface of the middle part of the support column 1 is fixed with a sliding platform 10, the inside of the sliding platform 10 is penetrated and connected with a mounting plate 11 in a sliding manner, the mounting plate 11 is divided into a left mounting plate 112 and a right mounting plate 111, the top ends of the right mounting plate 111 and the left mounting plate 112 are respectively fixed with a first spring 113, the top ends of the first springs 113 are fixed on the inner wall of the sliding platform 10, the bottom ends of the mounting plate 11 are respectively fixed with a first connecting rod 12, the bottom ends of the left mounting plate 112 and the right mounting plate 111 are respectively fixed with a first connecting rod 12, the bottom ends of the first connecting rod 12 are fixed with a sliding block 14, the sliding block 14 is divided into a left sliding block 142 and a right sliding block 141, the bottom ends of the right sliding block 141 and the left sliding block 142 are fixed with a second spring 144, two limiting sliding grooves (13) are respectively arranged, the left sliding block 142 and the right sliding block 141 are slidably connected in the limiting sliding groove 13, the top end of the sliding platform 10 is fixed with a bottom plate 15, a die can be placed above the bottom plate 15, the top end of the supporting column 1 is slidably connected with a second limiting sliding sleeve 16, the outer surface of the second limiting sliding sleeve 16 is fixed with a fixing plate 17, the bottom end of the fixing plate 17 is fixed with a fixing block 18, the pressing force of the fixing block 18 to the die can be controlled through the movement of the second limiting sliding sleeve 16, a first rack 19 is fixed in the second limiting sliding sleeve 16, a first gear 20 is arranged on the right side of the first rack 19, a rotating handle 21 is fixed on the outer surface of the first gear 20, the height of the fixing plate 17 can be adjusted through rotating the rotating handle 21, the inside of the bottom plate 15 is provided with a liquid lifting port 23, the inside of the bottom plate 15 is connected with a second connecting rod 25 in a sliding way, the left side of the second connecting rod 25 is fixedly provided with a blocking block 24, the beginning and the end of the liquid lifting in the die can be controlled through the opening and the closing of the blocking block 24, the right side of the second connecting rod 25 is fixedly provided with a second rack 26, the top end of the second rack 26 is provided with a second gear 27, the liquid lifting port 23, the blocking block 24 and the second rack 26 can be closed through the blocking block 24 after the die is filled with metal liquid, the metal liquid in the die can be prevented from flowing back through the left mounting plate 112 and the right mounting plate 111 without causing defects, the first gear 20 is meshed with the first rack 19, the second rack 26 is meshed with the second gear 27, the transmission belt 22 is connected to the inner transmission of the first gear 20, the other end of the transmission belt 22 is connected to the outer surface of the second gear 27 in a transmission manner, the hydraulic rod 28 is arranged on the left side of the hydraulic cylinder 2, the water storage tank 30 is arranged on the left side of the support column 1, the cooling water pipe 32 is fixed on the outer surface of the support column 1, the hydraulic rod 28 penetrates through and is fixed on the right side wall of the water storage tank 30, the movable plate 29 is slidably connected to the inner portion of the water storage tank 30, and water is poured into the cooling water pipe 32 from the outer portion to rapidly cool the mold through the design of the hydraulic cylinder 2, the hydraulic rod 28, the movable plate 29, the water storage tank 30 and the connecting water pipe 31 and the cooling water pipe 32 when transfusion is carried out in the mold.
Working principle: when the mold is used, the mold is placed on the bottom plate 15, then the rotating handle 21 drives the second limiting sliding sleeve 16 to move downwards and simultaneously drives the fixing block 18 to fix the mold, the blocking block 24 is driven by the driving belt 22 to be separated from the liquid lifting opening 23, the hydraulic cylinder 2 placing platform 4 is opened to move upwards, the limiting sliding chute 13 is extruded by the extruding column 6 to enable the sliding block 14 to move so as to drive the mounting plate 11 to move, the liquid lifting pipe 7 can enter the liquid lifting opening 23, the metal liquid in the crucible 5 is pressurized inwards through the air inlet pipe 8 to enter the mold, the hydraulic cylinder 2 is driven to move upwards while the hydraulic cylinder 28 is driven to push the moving plate 29 to move, the mold is cooled by water delivery in the cooling water pipe 32 through the connecting water pipe 31, the fixing block 18 is separated from the fixing of the mold by the rotating handle 21 after the delivery is finished, the blocking block 24 is closed again to the liquid lifting opening 23, and then the hydraulic cylinder 2 is closed.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (9)
1. Casting device for low pressure casting, comprising a support column (1), characterized in that: the utility model discloses a support column, including support column (1) and support column, bottom surface sliding connection of support column (1) has first spacing sliding sleeve (3), the top of first spacing sliding sleeve (3) is fixed with place platform (4), the bottom mounting of place platform (4) has pneumatic cylinder (2), the top of place platform (4) is fixed with crucible (5), the one end that crucible (5) was kept away from to place platform (4) is fixed with extrusion post (6), the inside of crucible (5) runs through and is fixed with lift tube (7), the top left side of crucible (5) runs through and is fixed with intake pipe (8), the top right side of crucible (5) runs through and is fixed with outlet duct (9), the middle part surface mounting of support column (1) is fixed with slide table (10), the inside of slide table (10) runs through and is connected with mounting panel (11) in a sliding manner, the bottom mounting panel (11) is fixed with head rod (12), the bottom mounting panel (14) of head rod (12), the top of slide table (10) is fixed with bottom plate (15), the top of support column (1) is fixed with lift tube (16), the fixed with second surface mounting panel (17), the inside of second spacing sliding sleeve (16) is fixed with first rack (19), the right side of first rack (19) is provided with first gear (20), the surface mounting of first gear (20) has changeing handle (21), liquid lifting port (23) have been seted up to the inside of bottom plate (15), the inside sliding connection of bottom plate (15) has second connecting rod (25), the left side of second connecting rod (25) is fixed with sprue (24), the right side of second connecting rod (25) is fixed with second rack (26), the top of second rack (26) is provided with second gear (27), the left side of pneumatic cylinder (2) is provided with hydraulic stem (28), the left side of support column (1) is provided with storage water tank (30), the surface mounting of support column (1) has cooling water pipe (32).
2. A casting device for low pressure casting according to claim 1, characterized in that: the mounting plate (11) is divided into a left mounting plate (112) and a right mounting plate (111), a first spring (113) is fixed at the top ends of the right mounting plate (111) and the left mounting plate (112), and the top ends of the first springs (113) are fixed on the inner wall of the sliding platform (10).
3. A casting device for low pressure casting according to claim 1, characterized in that: the sliding block (14) is divided into a left sliding block (142) and a right sliding block (141), and a second spring (144) is fixed at the bottom ends of the right sliding block (141) and the left sliding block (142).
4. A casting device for low pressure casting according to claim 3, characterized in that: the bottom of the right sliding block (141) and the bottom of the left sliding block (142) close to one end of the right sliding block are provided with extrusion grooves (143), and the shape of each extrusion groove (143) is the shape of the top end of each extrusion column (6).
5. A casting device for low pressure casting according to claim 1, characterized in that: the first gear (20) is meshed with the first rack (19), the second rack (26) is meshed with the second gear (27), a driving belt (22) is connected to the first gear (20) in a driving mode, and the other end of the driving belt (22) is connected to the outer surface of the second gear (27) in a driving mode.
6. A casting device for low pressure casting according to claim 1, characterized in that: the hydraulic rod (28) penetrates through and is fixed to the right side wall of the water storage tank (30), and the moving plate (29) is connected to the inside of the water storage tank (30) in a sliding mode.
7. A casting device for low pressure casting according to claim 1, characterized in that: the number of the extrusion columns (6) is two, and the two extrusion columns (6) are uniformly distributed on the left side and the right side of the top end of the placement platform (4).
8. A casting device for low pressure casting according to claim 1, characterized in that: the number of the first connecting rods (12) is two, and the first connecting rods (12) are fixed at the bottom ends of the left mounting plate (112) and the right mounting plate (111).
9. A casting device for low pressure casting according to claim 1, characterized in that: the two limiting sliding grooves (13) are respectively arranged, and a left sliding block (142) and a right sliding block (141) are connected inside the limiting sliding grooves (13) in a sliding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211225804.2A CN116618613A (en) | 2022-10-09 | 2022-10-09 | Casting device for low-pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211225804.2A CN116618613A (en) | 2022-10-09 | 2022-10-09 | Casting device for low-pressure casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116618613A true CN116618613A (en) | 2023-08-22 |
Family
ID=87608726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211225804.2A Pending CN116618613A (en) | 2022-10-09 | 2022-10-09 | Casting device for low-pressure casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116618613A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6196294B1 (en) * | 1996-04-04 | 2001-03-06 | Gustav Ohnsmann | Casting plant and method of producing castings |
| CN2569948Y (en) * | 2002-09-30 | 2003-09-03 | 福州华镁新技术开发有限公司 | Magnesium alloy low-pressure die-casting machine |
| DE20122418U1 (en) * | 2000-07-12 | 2005-09-01 | Hydro Aluminium Deutschland Gmbh | Bottom casting plant for light alloys has closure plate fitted with two sliding plates which produce staggered connection between furnace and mold when opened |
| CN104959573A (en) * | 2015-07-07 | 2015-10-07 | 清华大学 | Integrated low-pressure mould-filling and squeezing solidification casting device and method |
| CN107498027A (en) * | 2017-09-05 | 2017-12-22 | 哈尔滨工业大学 | Large ship rises liquid method with the automatic cut-off of copper alloy propeller antigravity casting |
| CN212042615U (en) * | 2020-04-20 | 2020-12-01 | 景德镇中达航空铸造有限公司 | Fixing structure of low-pressure casting device |
| CN114871402A (en) * | 2021-12-17 | 2022-08-09 | 刘明 | Novel die casting machine, pressure casting method, and method and device for switching on and off of cavity opening |
-
2022
- 2022-10-09 CN CN202211225804.2A patent/CN116618613A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6196294B1 (en) * | 1996-04-04 | 2001-03-06 | Gustav Ohnsmann | Casting plant and method of producing castings |
| DE20122418U1 (en) * | 2000-07-12 | 2005-09-01 | Hydro Aluminium Deutschland Gmbh | Bottom casting plant for light alloys has closure plate fitted with two sliding plates which produce staggered connection between furnace and mold when opened |
| CN2569948Y (en) * | 2002-09-30 | 2003-09-03 | 福州华镁新技术开发有限公司 | Magnesium alloy low-pressure die-casting machine |
| CN104959573A (en) * | 2015-07-07 | 2015-10-07 | 清华大学 | Integrated low-pressure mould-filling and squeezing solidification casting device and method |
| CN107498027A (en) * | 2017-09-05 | 2017-12-22 | 哈尔滨工业大学 | Large ship rises liquid method with the automatic cut-off of copper alloy propeller antigravity casting |
| CN212042615U (en) * | 2020-04-20 | 2020-12-01 | 景德镇中达航空铸造有限公司 | Fixing structure of low-pressure casting device |
| CN114871402A (en) * | 2021-12-17 | 2022-08-09 | 刘明 | Novel die casting machine, pressure casting method, and method and device for switching on and off of cavity opening |
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