CN218836048U - Low-pressure casting device - Google Patents
Low-pressure casting device Download PDFInfo
- Publication number
- CN218836048U CN218836048U CN202223444571.3U CN202223444571U CN218836048U CN 218836048 U CN218836048 U CN 218836048U CN 202223444571 U CN202223444571 U CN 202223444571U CN 218836048 U CN218836048 U CN 218836048U
- Authority
- CN
- China
- Prior art keywords
- liquid
- heat
- mould
- preservation
- pressure casting
- 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.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The utility model provides a low pressure casting device, including mould lower mould and mould upper mould, the heat preservation liquid carrying case is installed at the top of mould upper mould, through a plurality of wear-resisting thermal-insulated mold inserts intercommunication between heat preservation liquid carrying case and the mould upper mould, the sealed apron that keeps warm is installed at the top of heat preservation liquid carrying case, be provided with admission line and liquid feeding pipeline on the sealed apron that keeps warm, the equal vertical downward installation of a plurality of flexible drive arrangement is on the sealed apron that keeps warm, every flexible drive arrangement bottom all corresponds installs the liquid seal mold insert, the bottom of liquid seal mold insert runs through behind the heat preservation liquid carrying case extensible to the wear-resisting thermal-insulated mold insert that corresponds. This low pressure casting device adopts top-down's feed liquor mode, and make full use of aluminium liquid self gravity fills the type to can open or close through the order of controllable flexible drive arrangement control liquid seal mold insert, can flow to cast product aluminium liquid and fill the type order and carry out effective control, satisfy the casting requirement of large-scale foundry goods.
Description
Technical Field
The utility model relates to a casting technical field, concretely relates to low pressure casting device.
Background
Low-pressure casting technology appears in China from the 50 th century, has undergone technical development for decades, benefits from the development of automobile industry and the adoption of vigorous new technology, and in recent years, low-pressure casting technology is rapidly developed in China, and a large amount of low-pressure casting equipment is put into factories. The prior art low-pressure casting technology comprises a casting technology based on gas pressurization and a casting technology based on electromagnetic pump conveying conductive molten metal. Because of the cost factor, the prior art adopts the gas pressurization casting technology. The gas-pressurized low-pressure casting technique is characterized in that molten metal is filled from bottom to top under the action of lower gas pressure, and then is solidified under the action of pressure to obtain a casting. The gas pressurizing low pressure casting apparatus includes crucible, riser pipe installed on the crucible, and the riser pipe has one end extending to the bottom of the crucible and the other end outside the crucible. When dry gas is applied to a metal sheet surface of the sealed crucible, the gas pressure casting rises, the molten metal in the crucible tends to rise along a high-temperature-resistant riser tube in the molten metal and flows into a mold cavity above the crucible, and the pressurization is stopped when the molten metal is completely solidified from the upper part of the casting mold to a pouring gate; and demolding and taking the part after the molten metal in the liquid lifting pipe flows back to the crucible.
For example, chinese patent publication No. CN215315639U discloses a low pressure casting system, which includes a table, an upper mold, a lower mold, a crucible, and a riser tube; the upper die and the lower die are both positioned on the workbench; a product cavity for accommodating a product to be cast is formed between the upper die and the lower die; the crucible is positioned below the workbench, and the liquid lifting pipe is positioned in the crucible; the crucible is used for containing a metal solution to be subjected to low-pressure casting; one end of the liquid lifting pipe is communicated with the product cavity, and the other end of the liquid lifting pipe is communicated with the metal solution in the crucible; the side wall of the crucible is provided with an inlet of compressed air; a sensor is arranged at the position where the metal solution finally reaches in the filling process of the product cavity corresponding to the upper die; the sensor is connected with the external pressurization control system of the low-pressure casting system through an electric signal. The pressurization signal of the low-pressure casting system is fed back in time, and the pressurization can be realized in time. Meanwhile, the low-pressure casting system can reduce labor intensity, enables operators to easily learn and operate, and improves the yield of low-pressure cast products.
However, the above-mentioned low-pressure casting technique using gas pressurization type, in which the molten metal is filled from bottom to top under the action of relatively low gas pressure and then solidified under pressure to obtain a casting, has several major drawbacks:
(1) The liquid lifting sequence of different liquid lifting pipes cannot be controlled to carry out sequential liquid filling, and the method is only suitable for casting of castings with simple structures and is difficult to meet the requirement that the flowing and mold filling sequence in the aluminum liquid of large casting products is effectively controlled;
(2) The riser can not be fed, and the casting is easy to have shrinkage defects;
(3) The dead head needs to be cut off manually, so that the workload is increased;
(4) Molten aluminum is easily remained at the pouring gate position, so that the pouring gate position is difficult to separate from the casting.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a low pressure casting device adopts top-down's feed liquor mode, and the gravity of make full use of aluminium liquid self fills the type to can open or close through the order of controllable flexible drive arrangement control liquid seal mold insert, can fill the type order to the inside flow of casting product aluminium liquid and carry out effective control, satisfy the casting requirement of large-scale foundry goods.
The utility model provides a low pressure casting device, include: the mould is arranged below the mould, a mould upper mould is correspondingly arranged above the mould lower mould, a sand mould is placed between the mould lower mould and the mould upper mould, a heat-preservation liquid carrying box is installed at the top of the mould upper mould, the heat-preservation liquid carrying box is communicated with the mould upper mould through a plurality of wear-resistant heat-insulation inserts, a heat-preservation sealing cover plate is installed at the top of the heat-preservation liquid carrying box, an air inlet pipeline and a liquid adding pipeline which are communicated with the heat-preservation liquid carrying box are arranged on the heat-preservation sealing cover plate, a plurality of telescopic driving devices are vertically and downwards installed on the heat-preservation sealing cover plate, a liquid seal insert is correspondingly installed at the bottom of each telescopic driving device, the top of each liquid seal insert is connected with each telescopic driving device, and the bottom of each liquid seal insert can extend into the corresponding wear-resistant heat-insulation insert after penetrating through the heat-preservation liquid carrying box.
In the technical scheme, the low-pressure casting system operates according to the following method:
(1) Opening the upper mold and the lower mold, placing a sand mold in a mold cavity formed by the upper mold and the lower mold, and then closing the upper mold and the lower mold;
(2) The air inlet pipeline fills inert gas into the heat-preservation liquid carrying tank, so that the internal pressure of the heat-preservation liquid carrying tank reaches a set target pressure value of the sensor;
(3) The casting machine control circuit system sends out a system control instruction, and the telescopic driving device receives the system instruction and sequentially drives the liquid seal insert to move upwards;
(4) Opening the wear-resistant heat-insulation insert at the position of the sprue, injecting molten aluminum into a mold cavity formed by the upper mold and the lower mold of the mold under the action of the internal pressure of the heat-insulation liquid-carrying box, and continuously supplementing inert gas into the gas inlet pipeline to keep the internal of the heat-insulation liquid-carrying box in a constant pressure state;
(5) After the mold cavity is filled, the air inlet pipeline still continuously provides pressure for the heat-preservation carrier liquid tank in the solidification process of the casting so that the molten aluminum in the mold cavity reaches a pressure-maintaining state;
(6) When the feeding head is close to solidification in a molten state, a casting machine control circuit system sends a system control instruction, a telescopic driving device receives the system instruction to drive the liquid seal insert to move downwards, and the wear-resistant heat insulation insert enters a pouring gate to be closed;
(7) Opening the upper mold and the lower mold of the mold, and taking out the solidified casting;
(8) The aluminum liquid in the heat-preservation liquid carrying box is less than the set lower limit of the sensor, and the liquid adding pipeline adds the aluminum liquid to the heat-preservation liquid carrying box so as to achieve the set upper limit of the sensor in the heat-preservation liquid carrying box;
(9) Repeating steps 1 to 8.
Preferably, a heating rod is installed at the center of each liquid seal insert.
Preferably, the outer side of the heat-preservation liquid-carrying box is wrapped with a heat-preservation heat-insulation plate.
Preferably, a feeding head is arranged at the butt joint of the bottom of the wear-resistant heat-insulating insert and a mold cavity of the upper mold of the mold.
Preferably, the telescopic driving device is an air cylinder or a hydraulic cylinder, and the top of the liquid seal insert is fixed on a telescopic shaft of the air cylinder or the hydraulic cylinder.
Preferably, the air outlet of the air inlet pipeline is always positioned above the liquid level of the aluminum liquid in the heat-preservation liquid-carrying box.
This low pressure casting device's beneficial effect does:
(1) The low-pressure casting device can control the telescopic driving device, so that the opening and closing sequence of different liquid seal inserts can be set according to a system, the flowing and mold filling sequence inside molten aluminum of a cast product can be effectively controlled, the low-pressure casting device is particularly suitable for large cast products with complex structures, and the forming quality of the large cast products can be remarkably improved.
(2) The low-pressure casting device adopts a liquid inlet mode from top to bottom, fully utilizes the gravity of the aluminum liquid to fill the mold, can directly fill the mold cavity by using the liquid seal insert, can seal the pouring position after the completion, reduces the use of a flow passage in gravity/low-pressure casting, and greatly reduces the weight of a casting blank.
(3) The low-pressure casting device directly performs feeding on the dead head, so that the feeding capacity of the dead head is improved, the shrinkage defect of a casting is reduced, and the workload of casting blank flow channels and dead head cutting is reduced.
(4) This low pressure casting device feed liquor is accomplished the back and is sealed into the runner through liquid seal mold insert, is favorable to advancing the separation of runner and product, is convenient for realize production process automation, shortens foundry goods product forming cycle.
(5) This novel low die-casting system is easy control system's temperature and pressure invariant, guarantees the fashioned uniformity of multicavity, has improved the appearance precision of foundry goods.
Drawings
FIG. 1 is an assembly schematic view of the working structure of the present invention;
FIG. 2 is a schematic view of the assembly of the three-dimensional structure of the middle part structure of the present invention;
FIG. 3 is a perspective sectional view of the middle part of the structure of the present invention;
FIG. 4 is an exploded view of a part of the structure of the present invention;
fig. 5 is a sectional view of an assembly structure of a middle part structure of the present invention.
In the figure: 1. an air intake duct; 2. a liquid feeding pipeline; 3. a telescopic driving device; 4. a heat-preserving sealing cover plate; 5. a heat-preservation liquid-carrying box; 6. a wear-resistant heat-insulating insert; 7. liquid sealing the insert; 8. a heating rod; 9. aluminum liquid; 10. a heat insulation plate; 11. molding on a mold; 12. molding the die; 13. feeding a riser; 14. casting; 15. and (5) sand molding.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.
Example (b): a low-pressure casting apparatus.
Referring to fig. 1 to 5, a low pressure casting apparatus includes: a lower mold 12, an upper mold 11 correspondingly arranged above the lower mold 12, a casting mold cavity correspondingly arranged between the lower mold 12 and the upper mold 11, a sand mold 15 placed between the lower mold 12 and the upper mold 11, the sand mold 15 being a casting mold cavity made of raw sand, adhesive and other auxiliary materials in the casting production process, which can improve the appearance of the casting product,
the top of the upper die 11 of the die is provided with a heat-preservation liquid-carrying box 5, the heat-preservation liquid-carrying box 5 is used for loading molten aluminum 9, the outer side of the heat-preservation liquid-carrying box 5 is wrapped by a heat-preservation heat-insulation plate 10, the heat-preservation heat-insulation plate 10 is used for improving the heat-preservation effect of the heat-preservation liquid-carrying box 5, the heat-preservation liquid-carrying box 5 is communicated with the upper die 11 of the die through a plurality of wear-resistant heat-insulation inserts 6, the wear-resistant heat-insulation inserts 6 are used as the inlet gates of the molten aluminum 9 in the heat-preservation liquid-carrying box 5 and flow into the upper die 11 of the die, the butt joint of the bottoms of the wear-resistant heat-insulation inserts 6 and the die cavity of the upper die 11 of the die is provided with feeding risers 13, feeding can be directly carried out on the feeding by arranging the feeding risers 13, so that the feeding capability of the risers is improved, the shrinkage defect of the castings is reduced, and the workload of the blank runners and the cutting of the risers is reduced;
the top of the heat-preservation liquid-carrying box 5 is provided with a heat-preservation sealing cover plate 4, the heat-preservation sealing cover plate 4 is provided with an air inlet pipeline 1 and a liquid adding pipeline 2 which are communicated with the heat-preservation liquid-carrying box 5, an air outlet of the air inlet pipeline 1 is always positioned above the liquid level of aluminum liquid 9 in the heat-preservation liquid-carrying box 5, the air inlet pipeline 1 is used for filling inert gas into the heat-preservation liquid-carrying box 5 to keep the pressure in the heat-preservation liquid-carrying box 5 constant, and the liquid adding pipeline 2 is used for supplementing the aluminum liquid 9 into the heat-preservation liquid-carrying box 5;
the multiple telescopic driving devices 3 are vertically and downwards installed on the heat-preservation sealing cover plate 4, the bottom of each telescopic driving device 3 is correspondingly provided with a liquid sealing insert 7, the center of each liquid sealing insert 7 is provided with a heating rod 8 which can regulate and control the temperature of molten aluminum 9 in the heat-preservation liquid carrying box 5 and can ensure the temperature stability of the liquid sealing insert 7 and the wear-resistant heat insulation insert 6, the top of each liquid sealing insert 7 is connected with each telescopic driving device 3, the bottom of each liquid sealing insert 7 penetrates through the heat-preservation liquid carrying box 5 and then can extend into the corresponding wear-resistant heat insulation insert 6, each wear-resistant heat insulation insert 6 is correspondingly provided with one liquid sealing insert 7 and is controlled by one independent telescopic driving device 3, in the embodiment, each telescopic driving device 3 can be an air cylinder or a hydraulic cylinder and is used for independently controlling the liquid sealing insert 7 to move upwards or downwards, when the telescopic driving devices 3 drive the liquid sealing inserts 7 to move upwards, the liquid sealing inserts 7 are pulled out of the wear-resistant heat insulation inserts 6, and the heat insulation inserts 6 are used as a pouring gate for conveying the wear-resistant molten aluminum liquid 9 in the heat-preservation liquid carrying box 5 into a mold cavity 11 on a mold; when the telescopic driving device 3 drives the liquid seal insert 7 to move downwards, the liquid seal insert 7 can be inserted into the wear-resistant heat-insulation insert 6, so that the wear-resistant heat-insulation insert 6 is closed, the low-pressure casting device can control the telescopic driving device 3 to enable the opening and closing sequence of different liquid seal inserts 7 to be set according to a system, the flowing and mold filling sequence inside molten aluminum of a cast product can be effectively controlled, the low-pressure casting device is particularly suitable for large cast products with complex structures, and the forming quality of the large cast products can be remarkably improved.
The low-pressure casting system operates according to the following method:
s1, opening an upper mold 11 and a lower mold 12, placing a sand mold 15 in a mold cavity formed by the upper mold 11 and the lower mold 12, and then closing the upper mold 11 and the lower mold 12;
s2, filling inert gas into the heat-preservation liquid-carrying box 5 through the gas inlet pipeline 1, and enabling the internal pressure of the heat-preservation liquid-carrying box 5 to reach a set target pressure value of the sensor;
s3, the casting machine control circuit system sends out a system control instruction, and the telescopic driving device 3 receives the system instruction and sequentially drives the liquid seal insert 7 to move upwards;
s4, opening the inlet of the wear-resistant heat-insulation insert 6, injecting aluminum liquid 9 into a mold cavity formed by an upper mold 11 and a lower mold 12 under the action of the internal pressure of the heat-insulation liquid-carrying box 5, and continuously supplementing inert gas into the air inlet pipeline 1 to keep the internal pressure of the heat-insulation liquid-carrying box in a constant pressure state;
s5, after the mold cavity is filled, in the solidification process of the casting, the air inlet pipeline 1 still continuously provides pressure for the heat preservation liquid carrying box 5 to enable the molten aluminum in the mold cavity to reach a pressure maintaining state;
s6, when the feeding head 13 is close to solidification in a molten state, the casting machine control circuit system sends a system control instruction, the telescopic driving device 3 receives the system instruction to drive the liquid seal insert 7 to move downwards, and the wear-resistant heat insulation insert 6 enters a pouring gate to be closed;
s7, opening the upper mold 11 and the lower mold 12 of the mold, and taking out the solidified casting 14;
s8, when the aluminum liquid in the heat-preservation liquid-carrying box 5 is less than the set lower limit of the sensor, the liquid adding pipeline 2 adds the aluminum liquid to the heat-preservation liquid-carrying box 5 so as to achieve the set upper limit of the sensor in the heat-preservation liquid-carrying box 5;
and S9, repeating the steps S1 to S8.
The low-pressure casting device adopts a liquid inlet mode from top to bottom, fully utilizes the gravity of the aluminum liquid to fill the mold, can directly fill the mold cavity by using the liquid seal insert, can seal the pouring position after the completion, reduces the use of a flow passage in gravity/low-pressure casting, and greatly reduces the weight of a casting blank. And simultaneously, the workload of cutting off a casting blank runner and a riser is reduced. The low-pressure casting device can control the telescopic driving device 3, so that the opening and closing sequence of different liquid seal inserts 7 can be set according to a system, the flowing and mold filling sequence in molten aluminum of a cast product can be effectively controlled, the low-pressure casting device is particularly suitable for large cast products with complex structures, and the forming quality of the large cast products can be obviously improved.
The low-pressure casting device directly performs feeding on the dead head, so that the feeding capacity of the dead head is improved, the shrinkage defect of a casting is reduced, and the workload of casting blank flow channels and dead head cutting is reduced. This low pressure casting device feed liquor is accomplished the back and is sealed into the runner through liquid seal mold insert, is favorable to advancing the separation of runner and product, is convenient for realize production process automation, shortens foundry goods product forming cycle.
This novel low die-casting system is easy control system's temperature and pressure invariant, guarantees the fashioned uniformity of multicavity, has improved the appearance precision of foundry goods.
The above description is a preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the accompanying drawings, and therefore, all equivalents and modifications that can be accomplished without departing from the spirit of the present invention are within the protection scope of the present invention.
Claims (6)
1. A low-pressure casting apparatus characterized by comprising: the mould is arranged below the mould, a mould upper mould is correspondingly arranged above the mould lower mould, a sand mould is placed between the mould lower mould and the mould upper mould, a heat-preservation liquid-carrying box is installed at the top of the mould upper mould, the heat-preservation liquid-carrying box is communicated with the mould upper mould through a plurality of wear-resistant heat-insulation inserts, a heat-preservation sealing cover plate is installed at the top of the heat-preservation liquid-carrying box, an air inlet pipeline and a liquid feeding pipeline which are communicated with the heat-preservation liquid-carrying box are arranged on the heat-preservation sealing cover plate, a plurality of telescopic driving devices are vertically and downwards installed on the heat-preservation sealing cover plate, the bottom of each telescopic driving device is correspondingly provided with a liquid seal insert, the top of each liquid seal insert is connected with each telescopic driving device, and the bottom of each liquid seal insert can extend into the corresponding wear-resistant heat-insulation insert after penetrating through the heat-preservation liquid-carrying box.
2. The low pressure casting apparatus as claimed in claim 1, wherein: and a heating rod is arranged at the center of each liquid seal insert.
3. The low pressure casting apparatus of claim 1, wherein: and the outer side of the heat-preservation liquid-carrying tank is wrapped with a heat-preservation heat-insulation plate.
4. The low pressure casting apparatus of claim 1, wherein: and a feeding head is arranged at the butt joint of the bottom of the wear-resistant heat-insulation insert and a mold cavity of the upper mold of the mold.
5. The low pressure casting apparatus as claimed in claim 1, wherein: the telescopic driving device is an air cylinder or a hydraulic cylinder, and the top of the liquid seal insert is fixed on a telescopic shaft of the air cylinder or the hydraulic cylinder.
6. The low pressure casting apparatus as claimed in claim 1, wherein: and the air outlet of the air inlet pipeline is always positioned above the liquid level of the aluminum liquid in the heat-preservation liquid-carrying box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223444571.3U CN218836048U (en) | 2022-12-22 | 2022-12-22 | Low-pressure casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223444571.3U CN218836048U (en) | 2022-12-22 | 2022-12-22 | Low-pressure casting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218836048U true CN218836048U (en) | 2023-04-11 |
Family
ID=87303948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223444571.3U Active CN218836048U (en) | 2022-12-22 | 2022-12-22 | Low-pressure casting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218836048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115846623A (en) * | 2022-12-22 | 2023-03-28 | 广东鸿兴精密科技股份有限公司 | Novel low pressure casting system |
-
2022
- 2022-12-22 CN CN202223444571.3U patent/CN218836048U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115846623A (en) * | 2022-12-22 | 2023-03-28 | 广东鸿兴精密科技股份有限公司 | Novel low pressure casting system |
| CN115846623B (en) * | 2022-12-22 | 2023-08-11 | 广东鸿兴精密科技股份有限公司 | Low pressure casting system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102728791B (en) | A kind of aluminum alloy wheel gravity casting die | |
| CN101269414B (en) | Casting method for large-scale overpressure resistant aluminum housing | |
| CN113524394B (en) | Multi-station automatic hot-press casting device | |
| CN218836048U (en) | Low-pressure casting device | |
| CA3053411C (en) | Method and apparatus for counter-gravity mold filling | |
| CN205217919U (en) | Core assembly molding sand mould structure of transmission housing foundry goods | |
| CN110976814B (en) | Semi-continuous antigravity pouring method for aluminum alloy automobile frame | |
| CN204122724U (en) | The mould that a kind of heat dissipation metal housing semisolid pressure casting is shaping | |
| CN201644754U (en) | Heat insulation liquid guide system for casting and low-pressure casting machine | |
| CN215746356U (en) | Multi-material-chamber casting equipment | |
| CN114054721A (en) | Mold casting device | |
| CN106914606B (en) | A kind of casting compression solidification semi-successive cultivation device and method | |
| CN205763772U (en) | Full-automatic low pressure casting production line | |
| CN210334308U (en) | Feed-back system and extrusion die-casting machine | |
| CN115846623B (en) | Low pressure casting system | |
| CN106626231A (en) | In-mold decoration molding integrated injection mold | |
| CN102527994A (en) | Low-pressure casting device | |
| CN114247866A (en) | Die casting mechanism for aluminum alloy die casting machine facilitating separation of molding material and molding die | |
| CN106626256A (en) | In-mould decoration injection moulding mould | |
| CN208772425U (en) | A kind of three-in-one counter-pressure casting machine of new-energy automobile aluminium alloy | |
| CN202934103U (en) | Casting mould of pressure-resistant cast aluminum cover plate used for high-voltage switch | |
| CN208214282U (en) | A kind of air injection machine | |
| CN106392023B (en) | Metallic composite molding machine and technique | |
| CN206405415U (en) | A kind of sand mold low pressure casting tooling device of length, Large scale nonferrous metals casting | |
| CN114083765B (en) | Large thin-wall injection mold with complex core-pulling hot runner of shell and injection molding process of large thin-wall injection mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |