A casting device for producing a high-strength metal casting

Abstract

The application discloses a casting device for high-strength metal casting production and relates to the technical field of casting devices.The casting device comprises a mold, a material pocket is fixedly connected to the top of the mold, a piston plate is slidably connected to the inner side of the material pocket, a supporting seat is fixedly connected to the top of the material pocket, a hydraulic cylinder is installed at the top of the supporting seat, a connecting rod is fixedly connected to the inner side of the supporting seat and penetrates through the output end of the hydraulic cylinder, and the bottom of the connecting rod is fixedly connected with the top of the piston plate.A stepped pressure-increasing mechanism is arranged, the stepped spring pre-tightening force adjustment of the piston plate is realized, the opening pressure of the air vent groove is gradually increased, the progressive exhaust process is formed, the inherent shortcomings of the traditional constant-pressure exhaust are solved, the core forming defects such as casting pores, shrinkage holes and shrinkage porosity can be completely eliminated, the casting performance and the yield are improved, the mold impact and the production safety risk are avoided, and the batch consistency of products is ensured.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, specifically a casting equipment for producing high-strength metal castings. Background Technology

[0002] High-strength metal castings are core components in high-end equipment manufacturing, new energy vehicles, construction machinery, aerospace, and other fields. Their internal density, mechanical properties, forming accuracy, and batch consistency directly determine the operational reliability, service life, and core performance limits of the final equipment. As high-end manufacturing continues to demand higher load-bearing capacity, fatigue resistance, and lightweight properties from castings, traditional gravity casting processes can no longer meet the needs of large-scale production of high-strength, high-reliability metal castings. Pressure-controlled extrusion casting and low-pressure casting, with their advantages in optimizing casting quality, have become the mainstream technologies for the production of high-strength metal castings.

[0003] In the pressure casting process, the venting efficiency of the mold cavity, the controllability of the pressurization process, and the stability of pressure holding and feeding are the three core factors that determine the final quality of the casting. Currently, most conventional casting equipment in the industry adopts a natural venting structure with venting grooves and venting plugs at the mold parting surface and the end of the cavity. This relies on the liquid flow thrust during the filling process of the molten metal to expel the gas in the cavity. Natural venting relies on passive venting during molten metal filling, resulting in extremely poor venting completeness and process controllability. Free air in the cavity, gases trapped in the molten metal, and dissolved gases precipitated from the molten metal cannot be completely expelled, which can easily lead to fatal molding defects such as porosity, cold shuts, and incomplete filling in the casting, significantly reducing the casting yield and mechanical properties. Summary of the Invention

[0004] The purpose of this invention is to provide a casting device for producing high-strength metal castings, in order to solve the problem that the passive natural venting structure conventionally used in pressure casting has extremely poor controllability and thoroughness of venting, and cannot completely remove various gases from the mold cavity, which easily leads to fatal forming defects such as porosity and cold shuts in the castings.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a casting device for producing high-strength metal castings, comprising: a mold, a material hopper fixedly connected to the top of the mold, a piston plate slidably connected to the inner side of the material hopper, a support base fixedly connected to the top of the material hopper, a hydraulic cylinder mounted on the top of the support base, the output end of the hydraulic cylinder extending through to the inner side of the support base and fixedly connected to a connecting rod, and the bottom of the connecting rod being fixedly connected to the top of the piston plate; and a stepped pressurization mechanism, the stepped pressurization mechanism being disposed on the inner side of the piston plate. The stepped pressurization mechanism is used to increase the pressure inside the material bag in a stepwise manner. It includes a ventilator fixedly connected to the inside of the material bag, with two connecting strips fixedly connected to the ventilator. A pressure block is slidably connected to the outer wall of each connecting strip. Four ventilator slots are provided inside the ventilator. A synchronous change component is also provided inside the ventilator to synchronously change the size of the ventilator slots. Finally, a locking component is provided on one side of the ventilator to fix the pressure block when the material bag is being fed.

[0006] As a further embodiment of the present invention: the stepped pressurization mechanism further includes a sliding block slidably connected to the outer wall of the two connecting strips, a compression spring is installed between the pressing block and the sliding block, and a power component is provided at the top of the ventilator.

[0007] As a further embodiment of the present invention: the power assembly includes a drive rod rotatably connected to the inner side of the ventilator, and a sliding block threadedly connected to the outer wall of the drive rod; a sleeve is fixedly connected to the inner side of the support base, and a limiting groove is formed on the inner side of the sleeve; one end of the drive rod extends through to the top of the ventilator and is fixedly connected to the sliding block.

[0008] As a further embodiment of the present invention: a limiting groove is provided on the inner side of the sleeve, the limiting groove is composed of three arc-shaped grooves and four rectangular grooves, and the arc-shaped grooves and rectangular grooves are arranged in an alternating manner, and the sliding block is slidably connected to the inner side of the limiting groove.

[0009] As a further embodiment of the present invention: the synchronous change component includes a second rotating plate rotatably connected to the inner side of the ventilating groove, and the inner side of the second rotating plate is provided with a plurality of straight grooves, and a sealing block is slidably connected to the top of each straight groove.

[0010] As a further embodiment of the present invention: the synchronous sliding assembly further includes a first rotating plate rotatably connected to the inner side of the venting groove, the inner side of the first rotating plate is provided with a plurality of driving grooves, and the top of each of the plurality of sealing blocks is fixedly connected with a small cylinder, each of the small cylinders being slidably connected to the inner side of one of the driving grooves, and the top of the first rotating plate is provided with a synchronous driving unit.

[0011] As a further embodiment of the present invention: the synchronous drive unit includes a spur gear fixedly connected to the top of the first rotating plate, a spur gear plate fixedly connected to the outer wall of the drive rod, and four sets of locking teeth are provided on the outer wall of the spur gear plate, with four locking teeth in each set, and the four spur gears mesh with one set of locking teeth.

[0012] As a further embodiment of the present invention: the locking assembly includes a piston cylinder fixedly connected to the outer wall of the ventilator, a second piston rod slidably connected to the inner side of the piston cylinder, and the second piston rod extending through the inner side of the ventilator, a connecting plate fixedly connected to the inner side of the piston cylinder, and a return spring installed between the connecting plate and the second piston rod, and a first piston rod fixedly connected to the inner side of the material bag, and the diameter of the first piston rod is the same as the inner diameter of the piston cylinder.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By coordinating components such as the piston plate, the piston plate continuously descends to compress the cavity space, actively establishing a controllable positive pressure. This forces the gas inside the cavity to be directionally discharged through the venting groove. The thoroughness and controllability of venting are far superior to traditional natural venting methods. This structure can eliminate casting defects such as porosity, cold shuts, and incomplete pouring at the source. At the same time, the continuous positive pressure in the cavity can prevent backflow of external air, avoid secondary oxidation of the high-temperature molten metal, and significantly reduce oxide inclusion defects. With precise pressure holding by PLC, active feeding can be achieved during the solidification and shrinkage stage of the casting, effectively suppressing shrinkage cavities and porosity, and significantly improving the density, mechanical properties, yield, and batch production quality consistency of the casting. 2. By setting up a stepped pressurization mechanism, the stepped spring preload adjustment of the piston plate downward mechanical linkage is realized, so that the opening pressure of the venting groove increases step by step, forming a progressive exhaust process. This completely solves the inherent shortcomings of traditional constant pressure exhaust, can completely eliminate core forming defects such as casting porosity, shrinkage cavities and porosity, improve casting performance and yield, and at the same time avoid mold impact and production safety risks, and ensure product batch consistency. 3. By setting up a synchronous change component, this structure achieves synchronous reduction of the venting groove diameter as the cavity pressure increases through a transmission mechanism linked with the drive rod. In conjunction with the stepped pressure regulating structure, it is adapted to the entire process of venting and pressure holding, completely solving the inherent pain points of the fixed diameter venting structure. It can completely eliminate various forming defects in castings and greatly improve casting performance and production efficiency. 4. By setting a locking component, the internal air pressure of the piston cylinder drives the second piston rod to extend, forming a rigid mechanical lock on the pressure block. This completely counteracts the opening force caused by the impact of molten metal and the fluctuation of air pressure in the cavity, fundamentally preventing the backflow of molten metal and blockage of the exhaust channel caused by the accidental opening of the pressure block, ensuring smooth exhaust throughout the entire process. After pouring, the piston cylinder and the first piston rod automatically disengage and depressurize as the pressurizing mechanism descends. The second piston rod automatically retracts and unlocks under the action of the return spring. The entire locking and unlocking action is passively triggered by the mechanism linkage, precisely matching the timing of the pouring, pressurizing and venting processes, with no response delay. It can seamlessly connect to subsequent processes, operates stably and reliably, and is highly adaptable to the needs of automated continuous mass production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the stepped booster mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is an exploded view of the material bag and piston plate parts of the present invention; Figure 6 This is a partial structural diagram of the stepped booster mechanism of the present invention; Figure 7 This is a schematic diagram of the sleeve structure of the present invention; Figure 8 This is a schematic diagram of the pressing block structure of the present invention; Figure 9 This is a partial structural diagram of the locking component of the present invention; Figure 10 This is a partial structural diagram of the synchronous change component of the present invention; Figure 11 This is an exploded view of the first rotating plate, the second rotating plate, and the sealing block of the present invention.

[0015] In the diagram: 1. Mold; 2. Material bag; 3. Piston plate; 4. Support base; 5. Hydraulic cylinder; 6. Connecting rod; 7. Sleeve; 8. Drive rod; 9. First piston rod; 10. Vent cylinder; 11. Limiting groove; 12. Sliding block; 13. Connecting strip; 14. Pressing block; 15. Sliding block; 16. Compression spring; 17. Second piston rod; 18. Piston cylinder; 19. Connecting plate; 20. Return spring; 21. Straight gear plate; 22. Vent groove; 23. First rotating plate; 24. Second rotating plate; 25. Spur gear; 26. Drive groove; 27. Straight groove; 28. Sealing block; 29. ​​Small cylinder. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0018] Please see Figures 1 to 11This embodiment provides a casting device for producing high-strength metal castings, including: a mold 1, a material hopper 2 fixedly connected to the top of the mold 1, a piston plate 3 slidably connected to the inner side of the material hopper 2, a support base 4 fixedly connected to the top of the material hopper 2, a hydraulic cylinder 5 mounted on the top of the support base 4, a connecting rod 6 fixedly connected to the output end of the hydraulic cylinder 5 through the inner side of the support base 4, and the bottom of the connecting rod 6 fixedly connected to the top of the piston plate 3; a stepped pressurization mechanism, the stepped pressurization mechanism is disposed inside the piston plate 3, used to stepwise increase the pressure inside the material hopper 2, the stepped pressurization mechanism includes a venting cylinder 10 fixedly connected to the inner side of the material hopper 2, two connecting strips 13 fixedly connected to the venting cylinder 10, a pressing block 14 slidably connected to the outer wall of the two connecting strips 13, and the inner side of the venting cylinder 10... The device has four ventilation slots 22; the stepped pressurization mechanism also includes a sliding block 15 slidably connected to the outer wall of the two connecting bars 13, a compression spring 16 is installed between the pressing block 14 and the sliding block 15, and a power assembly is provided at the top of the ventilation cylinder 10; the power assembly includes a drive rod 8 rotatably connected to the inner side of the ventilation cylinder 10, and the sliding block 15 is threadedly connected to the outer wall of the drive rod 8; a sleeve 7 is fixedly connected to the inner side of the support base 4, and a limiting groove 11 is opened on the inner side of the sleeve 7; one end of the drive rod 8 passes through to the top of the ventilation cylinder 10 and is fixedly connected to a sliding block 12; the limiting groove 11 is opened on the inner side of the sleeve 7, and the limiting groove 11 is composed of three arc-shaped grooves and four rectangular grooves, and the arc-shaped grooves and rectangular grooves are arranged alternately; the sliding block 12 is slidably connected to the inner side of the limiting groove 11; The outer wall of the piston plate 3 is provided with a first sealing gasket, which can reliably seal the inside of the material bag 2 and ensure the sealing performance of the mating parts. Hydraulic cylinder 5 is precisely controlled by a PLC controller, enabling intermittent start-stop actions linked to the pouring process. After molten metal is poured into the cavity of mold 1 through the inlet of material bag 2, the PLC controller immediately triggers hydraulic cylinder 5 to start, driving connecting rod 6 downwards and simultaneously moving piston plate 3 downwards. When piston plate 3 reaches the position completely blocking the inlet of material bag 2, it continues to descend, compressing the sealed space inside material bag 2, causing the internal air pressure to continuously increase. When the internal pressure reaches a set threshold, the air pressure pushes the pressure block 14 upwards, opening the venting groove 22. Gas in material bag 2 and the connected mold cavity can then be directionally discharged outwards through the venting groove 22. This structure, by compressing the sealed space of material bag with the piston plate, actively establishes a controllable positive pressure inside the cavity, forcibly discharging gas in material bag 2 and the connected mold cavity through the venting groove 22. The thoroughness and process controllability of venting are far superior to traditional natural venting methods. It can eliminate casting defects such as porosity, cold shuts, and incomplete pouring from the root, greatly improve the density and mechanical properties of castings, and significantly increase the product yield. After the feed port is completely blocked, the material bag 2 and the mold cavity form a closed cavity that can only be unidirectionally connected by the venting groove 22. During the pressurization and pressure holding process, the cavity is continuously maintained under positive pressure, which can completely isolate the backflow of external air and avoid secondary oxidation caused by the contact between high-temperature molten metal and oxygen. This greatly reduces the probability of the formation of oxide inclusion defects in castings. At the same time, after the gas inside the cavity is vented, the hydraulic cylinder can be controlled by the PLC controller to achieve precise pressure holding. The continuous and stable positive pressure can be directly applied to the molten metal to achieve active feeding during the solidification and shrinkage stage of the casting, effectively suppressing the formation of shrinkage cavities and porosity defects in castings, and further improving the casting forming quality and batch production consistency. During the downward movement of the piston plate 3, the sliding block 12 moves downward synchronously. When the sliding block 12 contacts the first arc-shaped surface inside the limiting groove 11, the sliding block 12 continues to move downward and rotates circumferentially under the guidance of the arc-shaped surface. This, in turn, drives the sliding block 15 to rotate synchronously via the drive rod 8, compressing the compression spring 16 and increasing the preload pressure of the compression spring 16 on the pressure block 14. When the sliding block 12 disengages from the first arc-shaped surface, the sliding block 15 stops rotating. The sliding block 15 restarts its rotation when it contacts the second arc-shaped surface, repeating this cycle. This causes the preload pressure of the compression spring 16 on the pressure block 14 to increase in a stepwise manner with the downward stroke of the piston plate 3, thereby increasing the internal pressure of the material bag 2. The pressure gradually increases to ensure the priority and full discharge of gas inside the mold cavity during the initial stage of casting. This structure, through the step-type spring preload adjustment mechanically linked to the downward stroke of the piston plate 3, allows the opening pressure threshold of the venting groove 22 to gradually increase with the pressurization process, forming a progressive venting process of low-pressure high-flow coarse venting → medium-pressure fine venting → high-pressure sealed pressure locking. This fundamentally avoids the inherent shortcomings of traditional constant-pressure venting structures. In the initial low-pressure venting stage, the preload of the compression spring 16 on the pressure block 14 is minimal, and the opening pressure threshold of the venting groove 22 is extremely low. In the initial stage after the piston plate completes the sealing of the feed port and starts pressurization, the pressure block can be pushed open under low pressure, allowing for rapid and high-flow discharge of most of the free air in the material pocket 2 and the mold cavity, as well as the surface gas trapped during the casting process. The low-pressure, stable venting system avoids forcibly injecting gas into the high-temperature molten metal, preventing defects such as subcutaneous pores and dissolved pores. It also prevents excessively fast airflow from entraining molten metal and blocking the venting channels, ensuring a smooth and thorough venting process. During the step-by-step pressure-increasing venting stage, as the piston plate 3 continues to descend, the preload of the compression spring 16 increases in stages, and the opening pressure threshold of the venting groove 22 increases synchronously. Each pressure increase forces out trace amounts of residual gas adhering to the cavity dead corners and the surface of the molten metal, as well as dissolved gas precipitated from the molten metal during the pressure increase. The stable gradient pressure increase avoids the problem of reverse gas dissolution caused by a single high pressure, ensuring that gas at different pressure thresholds is fully discharged, guaranteeing thorough venting. Far superior to traditional constant pressure venting structures, it eliminates fatal molding defects such as porosity, cold shuts, and incomplete pouring in castings at their source. During the high-pressure holding and feeding stage, the low opening pressure in the early stage ensures the full and unobstructed discharge of gas inside the cavity. After the pre-tightening force is gradually increased to the rated peak value in the later stage, a stable high-pressure sealed cavity can be quickly established and maintained after the gas is discharged. With the PLC controller controlling the pressure holding of the hydraulic cylinder, the continuous and stable positive pressure can be directly applied to the molten metal, achieving strong active feeding during the solidification and shrinkage stage of the casting. This effectively suppresses shrinkage cavities and porosity defects, significantly improving the density and mechanical properties of the casting. At the same time, the smooth step-by-step pressure increase can avoid the impact load formed on mold 1 by the sudden pressure increase, eliminate the safety risks of mold expansion and mold bursting, and ensure the batch consistency of casting dimensional accuracy.

[0019] Please see Figures 2-8 The synchronous change component is located inside the ventilator 10 and is used to synchronously change the size of the ventilator groove 22. The synchronous change component includes a second rotating plate 24 rotatably connected to the inside of the ventilator groove 22. The inner side of the second rotating plate 24 has multiple straight grooves 27, and the top of each straight groove 27 is slidably connected to a sealing block 28. The synchronous sliding component also includes a first rotating plate 23 rotatably connected to the inside of the ventilator groove 22. The inner side of the first rotating plate 23 has multiple driving grooves 26, and the top of each of the multiple sealing blocks 28 is fixedly connected to a small cylinder 29. Each small cylinder 29 is slidably connected to the inside of a driving groove 26. The top of the first rotating plate 23 is provided with a synchronous driving unit. The synchronous driving unit includes a spur gear 25 fixedly connected to the top of the first rotating plate 23. The outer wall of the drive rod 8 is fixedly connected to a spur gear plate 21, and the outer wall of the spur gear plate 21 is provided with four sets of teeth. Each set of teeth has four teeth, and the four spur gears 25 mesh with one set of teeth. While the drive rod 8 rotates, it can drive the spur gear plate 21 to rotate synchronously. At this time, when the teeth on the outer wall of the spur gear plate 21 contact the outer wall of the spur gear 25, it can drive the spur gear 25 to rotate, thereby driving the first rotating plate 23 to rotate. Under the action of the drive groove 26, the sealing block 28 is driven to move laterally along the inner side of the straight groove 27. Under the combined action of multiple sealing blocks 28, the diameter of the venting groove 22 gradually decreases. This increases the downward pressure inside the material bag 2 while the diameter of the venting groove 22 decreases simultaneously. The venting groove 22 maintains its maximum diameter. With the lowest opening pressure of the compression spring 16, it achieves high-flow, unobstructed, and rapid venting. It can quickly remove most of the free air and surface gas trapped in the casting from the material bag 2 and the mold cavity, greatly shortening the venting time, increasing the production cycle, and avoiding the problems of poor venting and gas residue in the low-pressure stage of the small-diameter structure. In the medium-pressure step-by-step fine venting stage, the venting groove 22... The diameter decreases in a stepwise manner as the internal pressure increases. Combined with the progressively increasing opening pressure of the compression spring 16, a controllable throttling and venting effect is achieved. This ensures that trace amounts of residual gas adhering to the surface of the molten metal and dissolved gases precipitated from the molten metal after pressure increases are fully and smoothly discharged from each pressure plateau. It also avoids the problems of sudden pressure drops and gas back dissolving into the molten metal caused by a fixed large diameter, thus eliminating microscopic subcutaneous porosity defects in the casting at their source. During the high-pressure holding and feeding stage, the diameter of the vent groove 22 is reduced to its minimum. Combined with the pre-tightening force of the peak compression spring 16, this not only achieves the final discharge of trace residual gas inside the cavity but also quickly establishes and maintains a stable high-pressure sealed cavity. This completely solves the pain points of difficulty in holding pressure and insufficient feeding effect during the high-pressure stage of a fixed large-diameter structure. Combined with the pressure holding of the PLC hydraulic cylinder, it can strongly support active feeding during the solidification and shrinkage stage of the casting, effectively suppressing shrinkage cavities and porosity defects, and significantly improving the density and mechanical properties of the casting.

[0020] Please see Figures 6 to 11 The locking component is located on one side of the ventilator 10 and is used to fix the pressure block 14 when the material bag 2 is fed. The locking component includes a piston cylinder 18 fixedly connected to the outer wall of the ventilator 10. A second piston rod 17 is slidably connected to the inner side of the piston cylinder 18 and extends through the inner side of the ventilator 10. A connecting plate 19 is fixedly connected to the inner side of the piston cylinder 18, and a return spring 20 is installed between the connecting plate 19 and the second piston rod 17. A first piston rod 9 is fixedly connected to the inner side of the material bag 2, and the diameter of the first piston rod 9 is the same as the inner diameter of the piston cylinder 18. The bottom end of the first piston rod 9 is equipped with a second sealing gasket. When the first piston rod 9 is inserted into the inner cavity of the piston cylinder 18, the inner cavity of the piston cylinder 18 can be reliably sealed by the second sealing gasket, effectively preventing the gas inside the piston cylinder 18 from leaking out, ensuring the continuous stability of the gas pressure in the cavity, and providing a stable gas pressure driving force for the locking action of the second piston rod 17. During the process of the operator pouring molten metal into the inner cavity of the material hopper 2, the second piston rod 17 extends to the top of the pressure block 14 under the drive of the air pressure inside the piston cylinder 18, forming a rigid limit lock on the pressure block 14. This locking structure can effectively prevent the pressure block 14 from being accidentally opened due to the static pressure generated by the air pressure fluctuation in the mold cavity and the impact of the molten metal during the pouring process, thus eliminating the problem of molten metal flowing back into the vent cylinder 10 and causing blockage of the exhaust channel. After the molten metal is poured, the vent cylinder 10 moves downward with the piston plate pressurization mechanism, synchronously driving the piston cylinder 18 to move downward, so that the first piston rod 9 gradually disengages from the piston cylinder 18. When the first piston rod 9 is completely separated from the piston cylinder 18, the internal cavity of the piston cylinder 18 is depressurized, and the second piston rod... Under the reset pull of the reset spring 20, 17 retracts to the right, automatically releasing the lock on the pressure block 14. This structure extends the second piston rod 17 through air pressure to form a rigid mechanical lock, which can completely offset the axial opening force caused by the impact of molten metal and the fluctuation of air pressure in the cavity. No matter what fluctuations occur in the pouring conditions, it can ensure that the pressure block 14 will not open unexpectedly during the entire pouring process, completely avoiding the risk of molten metal backflow and ensuring the smoothness of the exhaust channel throughout the entire process cycle. At the same time, the locking and unlocking actions are passively triggered by the mechanism linkage, which is precisely matched with the timing of the pouring, pressurizing and venting processes. The unlocking action responds promptly without delay and can seamlessly connect to the subsequent pressurizing and venting processes. The overall operation is stable and reliable, and it is highly adaptable to the production needs of automated continuous mass production.

[0021] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A casting apparatus for producing high-strength metal castings, characterized in that, include: A mold (1) is fixedly connected to a material bag (2) at the top of the mold (1). A piston plate (3) is slidably connected to the inner side of the material bag (2). A support base (4) is fixedly connected to the top of the material bag (2). A hydraulic cylinder (5) is installed on the top of the support base (4). The output end of the hydraulic cylinder (5) extends through to the inner side of the support base (4) and is fixedly connected to a connecting rod (6). The bottom of the connecting rod (6) is fixedly connected to the top of the piston plate (3). A stepped pressurization mechanism is provided on the inner side of the piston plate (3) to step up the pressure inside the material hopper (2). The stepped pressurization mechanism includes a ventilator (10) fixedly connected to the inner side of the material hopper (2). The ventilator (10) is fixedly connected to two connecting strips (13). A pressure block (14) is slidably connected to the outer wall of the two connecting strips (13). Four ventilator grooves (22) are provided on the inner side of the ventilator (10). A synchronous change component is disposed inside the ventilator (10) and is used to synchronously change the size of the ventilator groove (22); A locking component is provided on one side of the vent (10) for fixing the pressure block (14) when the material bag (2) is feeding.

2. The casting apparatus for producing high-strength metal castings according to claim 1, characterized in that, The stepped pressurization mechanism also includes a sliding block (15) slidably connected to the outer wall of the two connecting bars (13), a compression spring (16) is installed between the pressing block (14) and the sliding block (15), and a power assembly is provided on the top of the vent (10).

3. The casting apparatus for producing high-strength metal castings according to claim 2, characterized in that, The power assembly includes a drive rod (8) rotatably connected to the inside of the ventilator (10), and a sliding block (15) threadedly connected to the outer wall of the drive rod (8). A sleeve (7) is fixedly connected to the inside of the support base (4), and a limiting groove (11) is opened on the inside of the sleeve (7). One end of the drive rod (8) extends through to the top of the ventilator (10) and is fixedly connected to a sliding block (12).

4. The casting apparatus for producing high-strength metal castings according to claim 3, characterized in that, The sleeve (7) has a limiting groove (11) on its inner side. The limiting groove (11) is composed of three arc-shaped grooves and four rectangular grooves, and the arc-shaped grooves and rectangular grooves are arranged in an alternating manner. The sliding block (12) is slidably connected to the inner side of the limiting groove (11).

5. A casting apparatus for producing high-strength metal castings according to claim 4, characterized in that, The synchronous change component includes a second rotating plate (24) rotatably connected to the inner side of the venting groove (22). The inner side of the second rotating plate (24) is provided with a plurality of straight grooves (27), and a sealing block (28) is slidably connected to the top of each straight groove (27).

6. A casting apparatus for producing high-strength metal castings according to claim 5, characterized in that, The synchronous change component also includes a first rotating plate (23) rotatably connected to the inner side of the venting groove (22). The inner side of the first rotating plate (23) is provided with a plurality of driving grooves (26), and the top of the plurality of sealing blocks (28) is fixedly connected with a small cylinder (29). Each small cylinder (29) is slidably connected to the inner side of a driving groove (26). The top of the first rotating plate (23) is provided with a synchronous driving unit.

7. A casting apparatus for producing high-strength metal castings according to claim 6, characterized in that, The synchronous drive unit includes a spur gear (25) fixedly connected to the top of the first rotating plate (23), and a spur gear plate (21) fixedly connected to the outer wall of the drive rod (8). The outer wall of the spur gear plate (21) is provided with four sets of locking teeth, each set of locking teeth having four teeth, and the four spur gears (25) mesh with one set of locking teeth.

8. A casting apparatus for producing high-strength metal castings according to claim 7, characterized in that, The locking assembly includes a piston cylinder (18) fixedly connected to the outer wall of the ventilator (10), a second piston rod (17) slidably connected to the inner side of the piston cylinder (18), and the second piston rod (17) extends through the inner side of the ventilator (10). A connecting plate (19) is fixedly connected to the inner side of the piston cylinder (18), and a return spring (20) is installed between the connecting plate (19) and the second piston rod (17). A first piston rod (9) is fixedly connected to the inner side of the material bag (2), and the diameter of the first piston rod (9) is the same as the inner diameter of the piston cylinder (18).

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