Rapid die casting equipment for aluminum alloy die castings

Abstract

The invention discloses rapid die casting equipment for aluminum alloy die castings, and relates to the technical field of aluminum alloy die casting, the rapid die casting equipment comprises an injection molding support and an injection molding device arranged on the injection molding support, a mold forming part is arranged in the injection molding support, and a driving part used for driving the mold forming part to be opened and closed is further arranged on the injection molding support; the mold forming part comprises a movable mold, a fixed mold, a built-in fixed mold and a built-in movable mold, the built-in fixed mold is arranged at the press-fit end of the movable mold, the built-in movable mold is arranged at the press-fit end of the fixed mold in an attached mode, flow channels are formed in the movable mold and the fixed mold, a vent groove is formed in the built-in movable mold, and the built-in movable mold is arranged in the vent groove. Meanwhile, mechanical ejection and vibration demolding are achieved, the demolding efficiency and the success rate are remarkably improved, pneumatic demolding is achieved, deformation or damage caused by too large local stress can be effectively prevented, and the demolding success rate is greatly increased through the synergistic effect of mechanical vibration and pneumatic stripping.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy die casting technology, and in particular to a rapid die casting equipment for aluminum alloy die castings. Background Technology

[0002] During the production of aluminum alloy die casting, some large flat and thin-walled structural parts are die-cast. Due to their inherent structural characteristics, such parts have a relatively large surface area to volume ratio, relatively low rigidity, and a wide contact area with the mold cavity, which leads to many problems during the demolding process.

[0003] Traditional ejection systems, such as ejector pins or ejector rods, typically rely on limited point or line contact to apply ejection force. For large planar parts, this concentrated ejection force can easily generate excessive stress in localized areas, leading to plastic deformation, warping, or even irreversible damage such as puncture or white marks, severely reducing product yield.

[0004] Furthermore, after thin-walled parts cool and solidify, they exert significant clamping forces and vacuum adsorption effects on the mold cavity, especially the deep cavities. Simple mechanical ejection often requires enormous ejection forces to overcome the initial static friction, which not only places higher demands on the strength of the ejection system and the mold, but also exacerbates the wear of the ejector pins and mold core, shortening the mold life. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid die-casting equipment for aluminum alloy die-casting parts, which has the advantages of mechanical ejection and vibration demolding, significantly improving demolding efficiency and success rate, and also has pneumatic demolding, which can effectively prevent deformation or damage caused by excessive local stress. The synergistic effect of mechanical vibration and pneumatic peeling greatly improves the demolding success rate.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rapid die casting equipment for aluminum alloy die castings, comprising an injection support and an injection molding machine disposed thereon, wherein a mold forming part is disposed inside the injection support, and a driving component for driving the mold forming part to open and close is also disposed on the injection support; The mold forming part includes a moving mold, a fixed mold, an inner fixed mold, and an inner moving mold. The inner fixed mold is disposed at the pressing end of the moving mold, and the inner moving mold is fitted to the pressing end of the fixed mold. Both the moving mold and the fixed mold are provided with flow channels inside, and the inner moving mold is provided with a ventilation groove inside. The fixed mold is provided with an ejection mechanism, which includes an elastic element, an impact element, and a linkage element. The built-in fixed mold has an inner groove for accommodating the elastic element and the impact element. When the mold is opened, the driving component drives the moving mold away from the fixed mold and squeezes the elastic component to shrink it, while simultaneously pushing the built-in moving mold out. When the linkage component moves to unlock the elastic component, the elastic component resets and drives the impact component to impact the built-in moving mold. At the same time, the venting groove connects with the flow channel, and gas enters the venting groove through the flow channel.

[0007] Furthermore, the four corners of both the moving mold and the fixed mold are fitted onto the injection molding bracket.

[0008] Furthermore, one end of the flow channel is connected to an air pump for injecting cooling gas into the flow channel.

[0009] Furthermore, the ejection mechanism also includes an ejection plate connected to the moving mold via a support rod, and a compression rod that engages with the elastic element is provided on the ejection plate.

[0010] Furthermore, the elastic element includes a spring and a pressure plate, with one end of the spring connected to the pressure plate and the other end of the spring connected to the impact element.

[0011] Furthermore, the rear end of the built-in moving mold is provided with an extension seat, which is inserted into the inner groove of the built-in fixed mold.

[0012] Furthermore, the impact member includes a top block and a limiting plate. The upper and lower end faces of the top block are connected to the limiting plate, and the upper and lower end faces of the extension seat are provided with grooves for limiting the sliding of the limiting plate.

[0013] Furthermore, the extension seat has two slots along its length, namely slot A and slot B. When the moving mold and the fixed mold are in the pressing state, slot A is aligned with the flow channel. When the internal moving mold is in the ejection state, slot B is aligned with the flow channel. Slot B is connected to the ventilation slot in a split flow manner.

[0014] Furthermore, the ejection mechanism also includes an ejector rod connected to the ejector plate, and a sleeve that movably engages with the ejector rod is provided on the rear end face of the built-in moving mold.

[0015] Furthermore, the linkage component includes a rotating rod connected to the inner groove wall at both ends by torsion springs, and side abutments and a linkage gear respectively sleeved on the upper and lower ends of the rotating rod. The sleeve side end is indirectly provided with teeth that limit and engage with one side of the linkage gear, and the sleeve is also provided with a rack that movably meshes with one side of the linkage gear.

[0016] The technical effects and advantages of this invention are as follows: This invention achieves pneumatic demolding by cooperating with the flow channels inside the moving and fixed molds and the ventilation grooves on the built-in moving mold. This effectively reduces the adhesion between the casting and the mold. The ejection mechanism, through the synergistic action of elastic elements, impact elements, and linkage elements, achieves mechanical ejection and vibration demolding in stages during the mold opening process, significantly improving demolding efficiency and success rate. It is especially suitable for deep-cavity, thin-walled, or complex aluminum alloy die-castings. The overall structure is compact, and the demolding methods are diverse, combining the advantages of pneumatic and mechanical vibration. The advantage of pneumatic demolding is that its force is uniform, non-contact, and has no directional restrictions, which can perfectly supplement areas that mechanical ejection and vibration may not be able to reach. Especially for large flat surfaces and thin-walled parts, it can effectively prevent deformation or damage caused by excessive local stress. The synergistic effect of mechanical vibration and pneumatic stripping greatly improves the demolding success rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the mold forming part of the present invention; Figure 3 This is a schematic diagram of the mold opening structure of the molded part of the present invention; Figure 4 This is a half-sectional view of the fixed mold structure of the present invention; Figure 5 This is a schematic diagram of the ejection mechanism of the present invention; Figure 6 This is a schematic diagram of the elastic element and impact element structure of the present invention; Figure 7 This is a partial cross-sectional view of the built-in moving mold structure of the present invention; Figure 8 This is a schematic diagram of the linkage and impact components of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point A.

[0018] In the picture: 1. Injection molding bracket; 11. Drive component; 2. Injection molding machine; 3. Mold forming component; 31. Moving mold; 32. Fixed mold; 321. Runner; 33. Internal fixed mold; 34. Internal moving mold; 341. Vent groove; 342. Extension seat; 3421. Slide groove; 3422. Slot A; 3423. Slot B; 343. Sleeve; 3431. Tooth; 3432. Rack; 4. Ejection mechanism; 41. Elastic component; 411. Spring; 412. Pressure plate; 42. Impact component; 421. Ejector block; 4211. Side baffle; 422. Limiting plate; 43. Linkage component; 431. Rotating rod; 4311. Side stop plate; 4312. Linkage gear; 44. Ejector plate; 441. Compression rod; 45. Ejector rod. Detailed Implementation

[0019] 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.

[0020] Reference Figure 1 - Figure 9 This invention provides a rapid die-casting equipment for aluminum alloy die-casting parts, including an injection support 1 and an injection molding machine 2 mounted thereon. The injection support 1 contains a mold forming part 3. As the basic load-bearing and installation platform of the entire equipment, the robust structure of the injection support 1 provides an extremely stable mechanical environment for the high-pressure injection of the injection molding machine 2 and the precise opening and closing of the mold forming part 3, effectively avoiding the slight deformation or vibration that may occur in the equipment under high-speed and high-pressure working conditions.

[0021] The injection molding bracket 1 is also provided with a driving component 11 for driving the mold forming part 3 to open and close. The driving component 11 serves as a power source, and its stable integration with the injection molding bracket 1 ensures the accuracy and efficiency of the mold opening and closing action, providing an accurate time and space starting point for the subsequent demolding sequence.

[0022] The mold forming component 3 includes a moving mold 31, a fixed mold 32, an internal fixed mold 33, and an internal moving mold 34. The internal fixed mold 33 is disposed at the pressing end of the moving mold 31, and the internal moving mold 34 is fitted to the pressing end of the fixed mold 32. As core components that directly form the cavity, the internal fixed mold 33 and the internal moving mold 34 can be made of higher-grade mold steel with better heat fatigue resistance, thereby improving the forming accuracy and mold rigidity.

[0023] Both the moving mold 31 and the fixed mold 32 are equipped with flow channels 321. One end of the flow channel 321 is connected to an air pump for injecting cooling gas into the flow channel 321. By injecting forced cooling gas into the flow channel 321 through the air pump, efficient, uniform and active cooling can be achieved for the moving mold 31 and the fixed mold 32, especially the areas with built-in moving mold 34 and built-in fixed mold 33. Compared with traditional cooling water circuits, gas cooling can avoid the potential corrosion risk of water vapor condensation to the mold. Moreover, the cooling intensity can be easily and precisely adjusted by the flow rate and pressure of the air pump, thereby enabling more precise control of the mold temperature field and ensuring that the aluminum alloy liquid achieves the optimal solidification sequence and shrinkage compensation effect in the cavity.

[0024] A ventilation slot 341 is provided inside the built-in moving mold 34; The fixed mold 32 is provided with an ejection mechanism 4, which includes an elastic element 41, an impact element 42 and a linkage element 43. The built-in fixed mold 33 has an inner groove for accommodating the elastic element 41 and the impact element 42. When the mold is opened, the driving member 11 drives the moving mold 31 away from the fixed mold 32 and squeezes the elastic member 41 to shrink it, while simultaneously pushing the built-in moving mold 34 out. When the linkage member 43 moves to unlock the elastic member 41, the elastic member 41 resets and drives the impact member 42 to impact the built-in moving mold 34 to achieve vibration demolding. At the same time, the venting groove 341 connects with the flow channel 321, and gas enters the venting groove 341 through the flow channel 321 to achieve pneumatic demolding.

[0025] By cooperating with the flow channel 321 set inside the moving mold 31 and the fixed mold 32 and the ventilation groove 341 on the built-in moving mold 34, the pneumatic demolding function is realized, which effectively reduces the adhesion between the casting and the mold. The ejection mechanism 4 achieves mechanical ejection and vibration demolding in stages during the mold opening process through the coordinated action of the elastic element 41, the impact element 42 and the linkage element 43, which significantly improves the demolding efficiency and success rate. It is especially suitable for aluminum alloy die castings with deep cavities, thin walls or complex structures. The overall structure is compact, the demolding method is diverse, and it has the advantages of both pneumatic and mechanical vibration.

[0026] During the mold opening process, the power of the driving component 11 is efficiently transmitted and distributed, serving not only as the power for mold opening but also as the initial power for demolding. While driving the moving mold 31 away from the fixed mold 32, the pushing action compresses the elastic component 41, causing it to contract and store energy, like a fully drawn bowstring, reserving the necessary elastic potential energy for subsequent explosive actions. Simultaneously, it synchronously pushes the built-in moving mold 34 to perform a preliminary ejection action. This action is smooth and controlled, aiming to create initial loosening between the die-cast part and the cavity, breaking the initial static friction and possible vacuum adsorption effects. The ingenuity of the entire process lies in the timing control; that is, as the initial ejection stroke of the built-in moving mold 34 nears its end, the casting is basically loosened but may still be subject to further loosening due to… When there is a risk of adhesion due to clamping force or minor burrs, the linkage 43 unlocks the elastic element 41. At this time, the compressed elastic element 41 instantly releases its stored energy, driving the impact element 42 to impact the built-in moving mold 34 with extremely high acceleration. This short, high-frequency mechanical impact generates a powerful vibration wave, which is transmitted to the entire die casting through the built-in moving mold 34. The advantage of vibration demolding is that it can effectively overcome the non-uniform clamping force caused by complex geometry, deep ribs, and minor undercuts, and shatter any possible surface adhesion points, allowing the casting to separate from the mold surface at a microscopic level. For aluminum alloy die castings with high surface quality requirements and complex structures, this avoids hard scratches and reduces ejection deformation.

[0027] At the same time as mechanical vibration demolding, the pneumatic demolding system is also activated. When the moving mold 31 and the fixed mold 32 separate to a specific distance, the ventilation groove 341 inside the moving mold 34 precisely aligns with the pre-set flow channels 321 inside the moving mold 31 and the fixed mold 32. High-pressure gas rushes into the ventilation groove 341 through the flow channel 321 and is ejected at high speed from the outlet of the ventilation groove 341, acting on the tiny gap between the die casting and the mold cavity. This airflow generates a uniform peeling force in the direction of demolding on the entire contact surface. Its effect is like an invisible air cushion, blowing the casting away from the mold surface. The advantages of pneumatic demolding are that its force is uniform, non-contact, and has no directional limitations. It can perfectly supplement areas that mechanical ejection and vibration may not be able to reach. Especially for large flat surfaces and thin-walled parts, it can effectively prevent deformation or damage caused by excessive local stress. The synergistic effect of mechanical vibration and pneumatic peeling greatly improves the demolding success rate.

[0028] The four corners of the moving mold 31 and the fixed mold 32 are all fitted onto the injection support 1.

[0029] The ejection mechanism 4 also includes an ejection plate 44 connected to the moving mold 31 via a support rod. When the moving mold 31 opens, the ejection plate 44 moves together with it via the support rod. When the moving mold 31 opens under the drive of the drive component 11, the ejection plate 44 moves in the same direction synchronously via the support rod. This mechanical linkage method does not require an additional independent hydraulic or electric ejection system, and at the same time ensures strict synchronization between the ejection action and the mold opening process, eliminating the risk of action interference caused by control signal delay or asynchrony. The ejector plate 44 is provided with a compression rod 441 that mates with the elastic element 41. The elastic element 41 includes a spring 411 and a pressure plate 412. One end of the spring 411 is connected to the pressure plate 412, and the other end of the spring 411 is connected to the impact element 42. The elastic element 41 adopts a combination of spring 411 and pressure plate 412. The pressure plate 412 provides a large and uniform force-bearing surface, ensuring that the force of the compression rod 441 can be smoothly and without impact transmitted to the spring 411. When the ejector plate 44 moves, the compression rod 441 compresses... The pressure plate 412 compresses the spring 411. The compression rod 441 on the ejector plate 44 serves as a trigger mechanism for energy storage. As it moves with the plate, it precisely squeezes the pressure plate 412 of the elastic element 41, thereby pushing the pressure plate 412 to force the spring 411 to compress and deform. This is a smooth and continuous energy accumulation process. The degree of compression of the spring 411 is in a precise proportional relationship with the mold opening stroke, making the energy storage controllable and predictable, thus preparing for the subsequent instantaneous release. The rear end of the built-in moving mold 34 is provided with an extension seat 342, which is inserted into the inner groove of the built-in fixed mold 33. The extension seat 342, which is extended from the rear end of the moving mold 34, not only serves to lengthen the guide and enhance the structural stability, but its design of being inserted into the inner groove of the built-in fixed mold 33 provides a precise, stable and wear-resistant motion guide for the entire ejection and vibration process, ensuring that the built-in moving mold 34 always moves along the correct axis during ejection and resetting, and ensuring the accuracy of the demolding action.

[0030] The impact member 42 includes a top block 421 and a limiting plate 422. The upper and lower end faces of the top block 421 are connected to the limiting plate 422. The upper and lower end faces of the extension seat 342 are provided with grooves 3421 for limiting the sliding of the limiting plate 422. When the inner moving mold 34 is ejected, the top block 421 is limited by the linkage member 43 and cannot move together. When the inner moving mold 34 moves, the limiting plate 422 slides in the groove 3421. The top block 421 of the impact member 42 is the component that directly transmits impact energy, while the limiting plate 422 connected to the upper and lower end faces... The grooves 3421 on the upper and lower end faces of the plate 422 and the extension seat 342 form a perfect sliding pair. The sliding of the limiting plate 422 in the groove 3421 strictly restricts the movement direction of the impact member 42, so that it can only move along a predetermined straight path, completely eliminating any possibility of rotation or offset. This ensures that the direction of the impact force is always perpendicular to the demolding direction of the built-in moving mold 34, thereby efficiently transmitting the vibration energy to the casting that needs to be demolded, avoiding energy dispersion and ineffective loss.

[0031] The ejection mechanism 4 also includes an ejector rod 45 connected to the ejector plate 44, and a sleeve 343 that is movably inserted into the rear end face of the built-in moving mold 34 is provided.

[0032] When the built-in moving mold 34 begins to eject, the linkage 43 acts as a stop block. Due to the limiting effect of the linkage 43 on the top block 421, the impact member 42 is fixed and cannot move. At this time, the built-in moving mold 34 continues to move under the push of the ejector rod 45, causing the extension seat 342 to be displaced relative to the stationary impact member 42. Specifically, the limiting plate 422 slides smoothly relative to the slide groove 3421. This relative motion process is the process of accumulating relative potential energy for the final impact. When the linkage 43 moves to a specific position and releases the constraint on the elastic member 41, the compressed spring 411 instantly releases its stored elastic potential energy and violently pushes the top block 421 of the impact member 42 to impact the corresponding part of the extension seat 342 or the built-in moving mold 34, which is now relatively stationary. The strong vibration wave generated can effectively break the adhesion between the casting and the mold cavity caused by the clamping force, vacuum adsorption or slight burrs, greatly improving the demolding success rate and reliability of complex deep cavity aluminum alloy die castings.

[0033] The extension base 342 has two slots along its length, namely slot A3422 and slot B3423. When the moving mold 31 and the fixed mold 32 are in the pressing state, slot A3422 is aligned with the flow channel 321. When the built-in moving mold 34 is in the ejection state, slot B3423 is aligned with the flow channel 321. Slot B3423 is connected to the venting groove 341 in a split manner. A sealing rod is provided in the venting groove 341. The fixed mold 32 has a slot for the sealing rod to be inserted. When the moving mold 31 and the fixed mold 32 are closed, the sealing rod is used to block the venting groove 341. When the moving mold 31 and the fixed mold 32 are opened, the sealing rod moves to the end of the venting groove 341 and is locked, so that the venting groove 341 is connected to the slot B3423. The sealing rod slides with the built-in moving mold 34 in the slot of the fixed mold 32.

[0034] The two independent slots A3422 and B3423 on the extension seat 342 constitute an intelligent air path switching valve. Through the relative movement of the extension seat 342 and the built-in moving mold 34, the switching between cooling and demolding air path modes is automatically and precisely achieved. When the moving mold 31 and the fixed mold 32 are in the pressing state, slot A3422 and the flow channel 321 are precisely aligned. At this time, the cooling gas injected from the air pump can be introduced into the mold through the flow channel 321 and slot A3422, achieving efficient cooling of key areas such as the built-in moving mold 34, ensuring that the casting obtains optimal solidification conditions during the forming stage. When the mold opening action is initiated and the built-in moving mold 34 is ejected to the predetermined position, the movement of the extension seat 342 causes slot B3423 to align with the flow channel 321. Since slot B3423 is interconnected with the venting groove 341 in a diversion manner, the high-pressure gas is instantly switched to... The demolding air path, ejected through the venting groove 341, acts on the surface of the casting and the cavity, forming a uniform pneumatic peeling force. The automatic switching of functions can be achieved solely through a precision-machined mechanical structure. The sealing rod set in the venting groove 341 is the key component for sealing and opening the air path. Its insertion design with the inner hole groove of the fixed mold 32 ensures that when the moving mold 31 and the fixed mold 32 are closed, the sealing rod reliably seals the venting groove 341 under the action of spring force or mechanical pressure. This completely prevents the high-temperature molten metal from flowing back into the precision air path system under the injection pressure during the die casting process, avoiding blockage and damage, and ensuring the long-term unobstructed flow and functional integrity of the air path. When the mold is opened, with the ejection movement of the built-in moving mold 34, the sealing rod is released from the sealing state of the venting groove 341. At this time, the venting groove 341 and the slot B3423 are interconnected, creating a channel for the spraying of high-pressure demolding gas.

[0035] The ejection mechanism 4 also includes an ejector rod 45 connected to the ejection plate 44. The rear end face of the built-in moving mold 34 is provided with a sleeve 343 that is movably inserted with the ejector rod 45. By adding the ejector rod 45 connected to the ejection plate 44 and the sleeve 343 provided at the rear end face of the built-in moving mold 34, the ejection mechanism 4 forms a direct power transmission path for primary ejection. The movable insertion of the ejector rod 45 and the sleeve 343 ensures the centering and stability of the ejection force, providing the built-in moving mold 34 with an initial and stable mechanical ejection force, so that the casting is initially loosened.

[0036] The linkage 43 includes a rotating rod 431 connected to the inner groove wall at both ends by torsion springs, and a side abutment plate 4311 and a linkage gear 4312 respectively sleeved on the upper and lower ends of the rotating rod 431. A tooth 3431 that is limited and engaged with one side of the linkage gear 4312 is indirectly provided on the side end of the sleeve 343. A rack 3432 that is movably engaged with one side of the linkage gear 4312 is also provided on the sleeve 343. A side baffle 4211 that is movably engaged with the side abutment plate 4311 is provided on the side end of the top block 421. The rotating rod 431 is connected to the inner groove wall by torsion springs at both ends, so that it has the function of automatic return. The side abutment plate 4311 and the linkage gear 4312 sleeved on the upper and lower ends of the rotating rod 431 interact with different components to realize timing control. The side baffle 4211 provided on the side end of the top block 421 is movably engaged with the side abutment plate 4311. The working process is as follows: In the initial ejection stage, the ejector plate 44 ejects, driving the compression rod 441 and the ejector rod 45 to move. The compression rod 441 drives the spring 411 to contract, and a cavity is reserved in the sleeve 343 for the movement of the ejector rod 45. When the ejector rod 45 moves to the top of the sleeve 343, the ejector rod 45 continues to eject, which in turn drives the built-in moving mold 34 to eject. Because the teeth 3431 initially engage and limit one side of the linkage gear 4312, the rotating rod 431 remains temporarily stationary. When the sleeve 343 moves with the ejector rod 45, the multiple teeth 3431 move and engage with the linkage gear. The wheel 4312 is driven by intermittent reverse rotation to ensure that the side abutment 4311 always blocks the side baffle 4211, keeping the impact member 42 stationary. At this time, the spring 411 is continuously compressed and stored by the compression rod 441. When the built-in moving mold 34 is fully ejected, the meshing motion of the rack 3432 and the linkage gear 4312 causes the rotating rod 431 to rotate to a specific angle, causing the side abutment 4311 to rotate and thus release the jamming of the side baffle 4211. At the same time, the compressed spring 411 is released instantly, driving the impact member 42 to violently impact the extension seat 342, completing the vibration demolding.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rapid injection-molding apparatus for aluminum alloy die castings, comprising an injection-molding support (1) and an injection-molding machine (2) arranged thereon, characterized in that: The injection support (1) is provided with a mold forming part (3), and the injection support (1) is further provided with a driving part (11) for driving the mold forming part (3) to open and close; The mold forming part (3) comprises a movable mold (31), a fixed mold (32), an embedded fixed mold (33) and an embedded movable mold (34), the embedded fixed mold (33) is arranged at the pressing end of the movable mold (31), the embedded movable mold (34) is arranged at the pressing end of the fixed mold (32), and flow channels (321) are arranged in the movable mold (31) and the fixed mold (32), and a ventilation groove (341) is arranged in the embedded movable mold (34). The fixed mold (32) is provided with an ejection mechanism (4), the ejection mechanism (4) comprises an elastic part (41), a striking part (42) and a linkage part (43), and the embedded fixed mold (33) is provided with an inner groove for accommodating the elastic part (41) and the striking part (42). When the mold is opened, the driving part (11) drives the movable mold (31) to move away from the fixed mold (32), extrudes the elastic part (41) to make it shrink, and at the same time pushes the embedded movable mold (34) to be ejected, when the linkage part (43) moves to unlock the elastic part (41), the elastic part (41) resets and drives the striking part (42) to strike the embedded movable mold (34); at the same time, the ventilation groove (341) is connected with the flow channel (321), and the gas enters the ventilation groove (341) through the flow channel (321).

2. The rapid die casting apparatus for aluminum alloy die castings according to claim 1, characterized by The movable mold (31) and the fixed mold (32) are sleeved on the injection support (1).

3. The rapid die casting apparatus for aluminum alloy die castings according to claim 1, characterized by One end of the flow channel (321) is connected with a gas pump for injecting cooling gas into the flow channel (321).

4. The rapid die casting apparatus for aluminum alloy die castings according to claim 1, characterized by The ejection mechanism (4) further comprises an ejection plate (44) connected with the movable mold (31) through a supporting rod, and the ejection plate (44) is provided with a compression rod (441) connected with the elastic part (41).

5. The rapid die casting apparatus for aluminum alloy die castings according to claim 1, characterized by The elastic part (41) comprises a spring (411) and a pressing plate (412), one end of the spring (411) is connected with the pressing plate (412), and the other end of the spring (411) is connected with the striking part (42).

6. The rapid die casting apparatus for aluminum alloy die castings according to claim 1, characterized by The embedded movable mold (34) is provided with an extension seat (342) at the rear end, and the extension seat (342) is inserted into the inner groove of the embedded fixed mold (33).

7. A rapid die casting apparatus for aluminum alloy die castings according to claim 6, wherein The striking part (42) comprises a top block (421) and a limiting plate (422), the top block (421) is connected with the limiting plate (422) at the upper and lower ends, and the extension seat (342) is provided with a sliding groove (3421) for limiting the sliding of the limiting plate (422) at the upper and lower ends.

8. A rapid die casting apparatus for aluminum alloy die castings according to claim 7, wherein Two grooves are arranged along the length of the extension seat (342), which are groove A (3422) and groove B (3423) respectively. When the movable die (31) and the fixed die (32) are in the pressing state, the groove A (3422) is aligned with the flow channel (321). When the built-in movable die (34) is in the ejection state, the groove B (3423) is aligned with the flow channel (321), and the groove B (3423) is communicated with the vent groove (341) in a shunt manner.

9. The rapid die casting apparatus for aluminum alloy die castings according to claim 4, characterized by The ejection mechanism (4) further comprises a ejector rod (45) connected with the ejector plate (44), and the rear end surface of the built-in movable die (34) is provided with a sleeve (343) movably inserted with the ejector rod (45).

10. A rapid die casting apparatus for aluminum alloy die castings according to claim 9, wherein The linkage (43) comprises a rotating rod (431) connected with the inner groove wall through a torsion spring at both ends, and a side stop plate (4311) and a linkage gear (4312) respectively sleeved on the upper and lower ends of the rotating rod (431). The side end of the sleeve (343) is indirectly provided with a gear tooth (3431) limiting and clamping on one side of the linkage gear (4312), and the sleeve (343) is further provided with a rack (3432) movably engaged on one side of the linkage gear (4312).

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