A new energy automobile part die casting device with replaceable mold core

Abstract

The application discloses a new energy automobile part die casting device with replaceable mold core, which comprises a die casting die, a static mold base is arranged on the die casting die, a dynamic mold base is arranged on the upper side of the static mold base, assembly grooves are arranged in the dynamic mold base and the static mold base, and assembly mold cores are arranged in the assembly grooves, a composite ejection mechanism is arranged at the bottom of the die casting die, and a compression type feeding assembly is arranged on the upper side of the die casting die, the compression type feeding assembly comprises a feeding pipe arranged on the dynamic mold base, and a hopper is arranged on the sidewall of the feeding pipe. When it is needed to produce parts of other sizes, the ejection cylinder does not need to be replaced, the whole ejection mechanism does not need to be redesigned, and only the secondary lever or the interference seat needs to be simply adjusted, so that the device can be quickly adapted, the operation of the production change is greatly facilitated, and the equipment modification cost and the production preparation time are reduced.

Description

Technical Field

[0001] This invention relates to the field of die-casting equipment, specifically to a die-casting equipment for new energy vehicle parts that facilitates mold core replacement. Background Technology

[0002] Die casting is a precision casting method that uses high pressure to force molten metal into a complex-shaped metal mold. The casting equipment and molds are expensive, so die casting is generally only used for mass production of large quantities of products. Manufacturing die-cast parts is relatively easy, generally requiring only four main steps, with very low incremental costs per item. It is particularly suitable for manufacturing large quantities of small and medium-sized castings. Therefore, die casting can be used extensively in the production of metal parts for automobiles.

[0003] Regarding patents related to die-casting devices for automotive parts, a search revealed Chinese patent CN117505804B, which discloses a die-casting device for metal parts of new energy vehicles. The device includes a workbench with a base fixedly mounted on its upper surface. A mold-closing assembly is located on the upper left side of the base, and a collection mechanism for collecting leaked molten metal is located in the middle of the upper side of the base. A collection box for storing the metal parts is located below the collection mechanism. In this die-casting device for metal parts of new energy vehicles, when the fixed container pushes two movable rods towards each other, the support rod drives the spray gun to rotate. When the spray switch contacts the U-shaped plate, lubricating oil is automatically sprayed into the container cavity.

[0004] While the aforementioned device can improve safety during use, the ejection stroke of the ejector rod is fixed during the ejection process of the molded parts. This makes it difficult to be compatible with the die-casting production of new energy vehicle parts of different models and sizes, resulting in low equipment versatility and inconvenience for model changeover. Summary of the Invention

[0005] The purpose of this invention is to provide a die-casting device for new energy vehicle parts that facilitates mold core replacement, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, a die-casting device for new energy vehicle parts that facilitates mold core replacement is provided. The device includes a die-casting mold, a stationary mold base on the die-casting mold, and a moving mold base on the upper side of the stationary mold base. Both the moving mold base and the stationary mold base have assembly slots, and assembly mold cores are provided in the assembly slots. The bottom of the die-casting mold is provided with a composite ejection mechanism, and the upper side of the die-casting mold is provided with a compression feeding assembly. The compression feeding assembly includes an injection pipe installed on the moving mold base, and a hopper is provided on the side wall of the injection pipe.

[0007] Furthermore, both sides of the assembly mold core are provided with alignment seats, and both sides of the assembly groove are provided with alignment tracks. The dimensions of the alignment tracks and the alignment seats are matched, and the alignment seats are inserted into the interior of the alignment tracks.

[0008] Furthermore, both the alignment track and the alignment seat have a dovetail-shaped structure, and the assembly mold cores in the moving mold seat and the stationary mold seat are detachable structures.

[0009] Furthermore, the product formed in the stationary mold base is ejected a second time through a composite ejection mechanism. The composite ejection mechanism includes multiple sets of ejector rods inserted in the stationary mold base, and the bottom of the multiple sets of ejector rods is connected to a secondary ejector plate. At the same time, a primary ejector plate is provided at the bottom of the secondary ejector plate. Both the primary and secondary ejector plates are rectangular in structure and are distributed in parallel.

[0010] 5. Furthermore, the secondary top plate is provided with limiting rods on both sides of its bottom, and the limiting rods are inserted into the limiting holes opened on the primary top plate. The composite ejection mechanism also includes an ejection cylinder fixed to the bottom of the die-casting mold, and the output end of the ejection cylinder is connected to the primary top plate.

[0011] Furthermore, the primary top plate is provided with secondary levers on both sides, and a fulcrum shaft is provided in the middle of the secondary levers. The secondary levers are rotatably connected to the primary top plate through the fulcrum shaft in the middle. The primary top plate is also provided with guide seats on both sides, and guide rods are inserted in the guide seats. The guide rods are fixed to the bottom of the die-casting mold.

[0012] Furthermore, the secondary lever has an "L" shaped structure, and one end of the secondary lever is rotatably connected to a passive wheel A, while the other end of the secondary lever is rotatably connected to a passive wheel B. The composite ejection mechanism also includes interference seats fixed on both sides of the bottom of the stationary mold base, and the interference seats and the passive wheel B are distributed opposite to each other.

[0013] Furthermore, the ejector rod performs a first demolding of the die-casting mold via the ejector cylinder, and the ejector rod performs a second demolding of the die-casting mold via a secondary lever.

[0014] Furthermore, the compression feeding assembly also includes a compression column that is movably inserted into the injection tube, and a piston is provided at the end of the compression column. The piston is slidably connected to the inner wall of the injection tube. The piston is a cylindrical structure made of high-temperature resistant rubber, and a compression plate is provided on one side of the piston.

[0015] Furthermore, a force-bearing seat is provided on the inner wall of the injection tube, and a pressure seat is provided on the upper side of the force-bearing seat. The pressure seat is fixed on the outside of the compression column, and a return spring is provided between the force-bearing seat and the compression column. The return spring is sleeved on the outside of the compression column, and the compression plate moves downward to compact the material entering the die-casting mold.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution utilizes the secondary lever and interference seat in the composite ejection mechanism to generate an independently adjustable secondary ejection displacement while keeping the ejection cylinder stroke fixed. This allows the total ejection stroke of the ejector rod to be no longer limited by the inherent stroke of the ejection cylinder. Instead, the secondary ejection distance can be flexibly changed by replacing the secondary lever with a different lever arm ratio or adjusting the installation position of the interference seat. This enables compatibility with new energy vehicle parts of different thicknesses, draft angles, and ejection requirements, significantly improving the versatility of die-casting molds. When it is necessary to change the production of parts of other sizes, there is no need to replace the ejection cylinder or redesign the entire ejection mechanism. Simply adjusting the secondary lever or interference seat is sufficient for quick adaptation, greatly facilitating changeover operations and reducing equipment modification costs and production preparation time.

[0017] 2. This solution achieves rapid plug-in replacement of the mold core by setting assembly slots with dovetail-shaped alignment tracks in the static and moving mold bases, and cooperating with the alignment seats on the assembly mold core. Simultaneously, the composite ejection mechanism employs a graded transmission structure of limit rods and secondary levers between the primary and secondary ejection plates. This ensures the stability of conventional primary ejection while achieving secondary ejection without increasing the ejection cylinder stroke. This avoids problems such as product puncture due to excessive ejection stroke or product failure to detach from the mold due to insufficient stroke. Furthermore, the passive wheels A and B at both ends of the secondary lever reduce frictional resistance, ensuring smooth and reliable secondary ejection. Ultimately, this allows the entire die-casting device to quickly respond to the production needs of different new energy vehicle parts, improving equipment flexibility while ensuring the complete demolding quality of the molded product and reducing the scrap rate caused by poor demolding. It has significant practical value and economic benefits. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is a schematic diagram of the moving mold base connection structure of the present invention; Figure 5 This is a schematic diagram of the assembly mold core connection structure of the present invention; Figure 6 This is a schematic diagram of the assembly groove structure of the present invention; Figure 7 This is a schematic diagram of the composite ejection mechanism of the present invention; Figure 8 This is a schematic diagram of the secondary lever structure of the present invention; Figure 9This is a schematic diagram of the connection structure of the compression feeding assembly of the present invention.

[0019] The diagram is labeled as follows: 100, Die-casting mold; 200, Static mold base; 201, Moving mold base; 21, Assembly slot; 22, Assembly mold core; 23, Alignment seat; 24, Alignment track; 202, Drive seat; 203, Drive cylinder; 300, Compound ejection mechanism; 31, Ejector rod; 32, Compression spring; 33, Secondary ejector plate; 34, Ejection cylinder; 35, Limit rod; 36, Primary ejector plate; 37, Guide seat; 38, Guide rod; 39, Secondary lever; 390, Interference seat; 391, Passive wheel A; 392, Passive wheel B; 393, Pivot shaft; 400, Compression feeding assembly; 41, Hopper; 42, Injection pipe; 43, Compression column; 44, Pressure seat; 45, Return spring; 46, Force-bearing seat; 47, Piston; 48, Compression plate. Detailed Implementation

[0020] Please see Figures 1-9 This invention provides a die-casting device for new energy vehicle parts that facilitates mold core replacement. The device includes a die-casting mold 100, a stationary mold base 200 on the die-casting mold 100, and a moving mold base 201 on the upper side of the stationary mold base 200. Both the moving mold base 201 and the stationary mold base 200 have assembly slots 21, and assembly mold cores 22 are provided in the assembly slots 21. The bottom of the die-casting mold 100 is provided with a composite ejection mechanism 300, and the upper side of the die-casting mold 100 is provided with a compression feeding assembly 400. The compression feeding assembly 400 includes an injection pipe 42 installed on the moving mold base 201, and a hopper 41 is provided on the side wall of the injection pipe 42.

[0021] As a preferred embodiment, the assembly mold core 22 is provided with alignment seats 23 on both sides, and the assembly groove 21 is provided with alignment tracks 24 on both sides. The dimensions of the alignment tracks 24 and the alignment seats 23 are matched, and the alignment seats 23 are inserted into the interior of the alignment tracks 24.

[0022] Both the alignment track 24 and the alignment seat 23 have a dovetail-shaped structure, and the assembly mold core 22 in the moving mold seat 201 and the stationary mold seat 200 are detachable structures.

[0023] like Figure 1-6As shown: Both the alignment track 24 and the alignment seat 23 have a dovetail-shaped structure, and the assembly mold cores 22 in the moving mold seat 201 and the stationary mold seat 200 are detachable structures. The dovetail fit can achieve self-centering and self-locking. When subjected to huge mold closing forces and lateral impact forces during the die casting process, the dovetail structure can effectively prevent the assembly mold core 22 from shifting or loosening, ensuring the precise alignment of the mold core and the mold cavity. At the same time, the dovetail track has a large contact area and guide length, which makes the mold core slide smoothly and wear less during disassembly and assembly, and can maintain high repeatability positioning accuracy even after long-term use. In addition, the detachable structure allows the same set of die casting molds 100 to quickly replace assembly mold cores 22 of different specifications without replacing the moving mold seat 201 and the stationary mold seat 200 as a whole, which greatly reduces changeover time and cost. It is especially suitable for the production needs of multi-variety and small-batch new energy vehicle parts, and significantly improves the versatility and flexibility of the equipment.

[0024] By designing the assembly mold core 22 as a detachable structure, and cooperating with the dovetail-shaped alignment track 24 and alignment seat 23, the same set of die-casting molds 100 can quickly replace assembly mold cores 22 with different cavity shapes. This allows for the production of new energy vehicle parts of different shapes and sizes without replacing the entire moving mold base 201 and stationary mold base 200, greatly improving the mold's versatility and flexible production capabilities. The dovetail structure enables precise guidance and self-centering during assembly and disassembly, ensuring that the assembly mold core 22 maintains a high degree of alignment accuracy with the mold cavity after each replacement, avoiding misalignment or gap problems caused by repeated assembly and disassembly. This ensures the dimensional consistency and molding quality of different parts. In addition, the dovetail-shaped mating surface has a large contact area and self-locking characteristics. When subjected to the impact of high-pressure molten metal during die casting, it can effectively prevent the assembly mold core 22 from shifting or loosening, ensuring long-term production stability. This design allows companies to prepare only a few sets of low-priced assembly mold cores 22 without investing in multiple complete molds, which greatly reduces the mold cost in the multi-variety, small-batch production mode. At the same time, the mold changeover time is shortened from several hours to several minutes, which significantly improves the changeover efficiency of the production line and meets the production needs of rapid iteration and diverse models of new energy vehicle parts.

[0025] The product formed in the stationary mold base 200 is ejected a second time through the composite ejection mechanism 300. The composite ejection mechanism 300 includes multiple sets of ejector rods 31 inserted in the stationary mold base 200, and the bottom of the multiple sets of ejector rods 31 is connected to a secondary ejector plate 33. At the same time, a primary ejector plate 36 is provided at the bottom of the secondary ejector plate 33. Both the primary ejector plate 36 and the secondary ejector plate 33 are rectangular in structure, and the primary ejector plate 36 and the secondary ejector plate 33 are distributed in parallel.

[0026] The secondary top plate 33 is provided with limiting rods 35 on both sides of the bottom, and the limiting rods 35 are inserted into the limiting holes opened on the primary top plate 36. The composite ejection mechanism 300 also includes an ejection cylinder 34 fixed to the bottom of the die-casting mold 100, and the output end of the ejection cylinder 34 is connected to the primary top plate 36.

[0027] The primary top plate 36 is provided with secondary levers 39 on both sides, and the secondary levers 39 are provided with a fulcrum shaft 393 in the middle. The secondary levers 39 are rotatably connected to the primary top plate 36 through the fulcrum shaft 393 in the middle. The primary top plate 36 is also provided with guide seats 37 on both sides, and guide rods 38 are inserted in the guide seats 37. The guide rods 38 are fixed to the bottom of the die-casting mold 100.

[0028] The secondary lever 39 has an "L" shaped structure, and one end of the secondary lever 39 is rotatably connected to the passive wheel A391, while the other end of the secondary lever 39 is rotatably connected to the passive wheel B392. The compound ejection mechanism 300 also includes interference seats 390 fixed on both sides of the bottom of the stationary mold base 200, and the interference seats 390 and the passive wheel B392 are distributed relative to each other.

[0029] The ejector rod 31 performs a first demolding of the die-casting mold 100 through the ejector cylinder 34, and the ejector rod 31 performs a second demolding of the die-casting mold 100 through the secondary lever 39.

[0030] like Figure 7-8 As shown: By setting an L-shaped secondary lever 39 rotatably connected on the primary ejector plate 36, and cooperating with the interference seat 390 fixed at the bottom of the stationary mold base 200, during the process of the ejector cylinder 34 driving the primary ejector plate 36 to rise, the passive wheel B392 contacts the interference seat 390 and forces the secondary lever 39 to rotate around the fulcrum axis 393, thereby causing the passive wheel A391 at its other end to push the secondary ejector plate 33 upward. Since the limiting rods 35 on both sides of the bottom of the secondary ejector plate 33 are inserted into the limiting holes of the primary ejector plate 36, the secondary ejector plate 33 generates an additional upward displacement relative to the primary ejector plate 36, thereby realizing the secondary ejection of the ejector rod 31; without increasing the stroke of the ejector cylinder 34 or adding an additional power source, two-stage ejection is achieved by pure mechanical linkage, avoiding This invention addresses the issues of excessive ejection stroke leading to product puncture or deformation, and insufficient stroke preventing product from detaching from the mold. Furthermore, by replacing the secondary lever 39 with different lever arm ratios or adjusting the installation position of the interference seat 390, the distance and timing of the secondary ejection can be flexibly changed, adapting to new energy vehicle parts of varying thicknesses and demolding resistances. This significantly improves the versatility of the die-casting mold 100 and the convenience of changeover production. In addition, the passive wheels A391 and B392 reduce sliding friction during lever rotation, ensuring smooth and reliable secondary ejection. The cooperation between the guide rod 38 and the guide seat 37 ensures the verticality and stability of the primary ejector plate 36 and the secondary ejector plate 33 during their movement. The overall structure is compact, low-cost, and easy to maintain.

[0031] The compression feeding assembly 400 also includes a compression column 43 that is movably inserted into the injection tube 42, and a piston 47 is provided at the end of the compression column 43. The piston 47 is slidably connected to the inner wall of the injection tube 42. The piston 47 is a cylindrical structure made of high temperature resistant rubber, and a compression plate 48 is provided on one side of the piston 47.

[0032] A force-bearing seat 46 is provided on the inner wall of the injection tube 42, and a pressure seat 44 is provided on the upper side of the force-bearing seat 46. The pressure seat 44 is fixed on the outside of the compression column 43, and a return spring 45 is provided between the force-bearing seat 46 and the compression column 43. The return spring 45 is sleeved on the outside of the compression column 43. The compression plate 48 moves downward to compact the material entering the die-casting mold 100.

[0033] like Figure 9 As shown: By setting a movable compression column 43 and its end piston 47 and compression plate 48 inside the injection tube 42, in conjunction with a force-bearing seat 46 fixed on the inner wall of the injection tube 42 and a pressure seat 44 fixed on the outer side of the compression column 43, and a return spring 45 sleeved between the force-bearing seat 46 and the compression column 43, the integrated action of feeding and compaction is realized. When the compression column 43 moves downward, the compression plate 48 actively compacts the material entering the die-casting mold 100, effectively eliminating casting defects such as porosity and shrinkage caused by loose material, and significantly improving the internal quality and density of new energy vehicle parts; Meanwhile, the return spring 45 automatically pushes the compression column 43 upward to reset after compaction, eliminating the need for an additional power source, simplifying the structure and reducing energy consumption; the piston 47 adopts a cylindrical structure made of high-temperature resistant rubber, which not only ensures long-term stable sealing in the high-temperature die-casting environment, but also avoids hard friction between the metal piston and the inner wall of the injection tube 42, extending its service life; in addition, this component completes compaction directly in the feeding channel, without occupying additional mold space, and the compaction action and feeding action are continuous, shortening the die-casting cycle and improving production efficiency.

[0034] Working principle: When the die-casting device for new energy vehicle parts is working, it first selects the corresponding assembly mold core 22 according to the model and size of the part to be produced. By inserting the dovetail-shaped alignment seats 23 on both sides of the assembly mold core 22 into the dovetail-shaped alignment tracks 24 on both sides of the assembly groove 21 in the stationary mold base 200 and the moving mold base 201, the mold core can be quickly and easily disassembled and installed.

[0035] After the mold is closed, the material enters the injection pipe 42 from the hopper 41. The compression column 43 drives the piston 47 and the compression plate 48 to move downward. The compression plate 48 compacts the material entering the die-casting mold 100. At the same time, the return spring 45 is sleeved on the outside of the compression column 43 and is compressed between the force seat 46 and the pressure seat 44 to store energy for the next material feeding. After molding, the composite ejection mechanism 300 begins to work: the ejection cylinder 34 pushes the primary ejector plate 36 upward, and the primary ejector plate 36 drives the secondary ejector plate 33 and multiple sets of ejector rods 31 to rise synchronously, performing a first demolding of the molded product in the stationary mold base 200. During this process, the "L"-shaped secondary levers 39 rotatably connected on both sides of the primary ejector plate 36 rise together with the primary ejector plate 36. When the driven wheel B392 at the end of the secondary lever 39 contacts the interference seat 390 fixed at the bottom of the stationary mold base 200, the interference seat 390 forces the secondary lever 39 to rise. The lever 39 rotates around the fulcrum 393 in its middle, causing the passive wheel A391 at the other end of the secondary lever 39 to push the secondary top plate 33 upward. Since the limiting rods 35 on both sides of the bottom of the secondary top plate 33 are inserted into the limiting holes of the primary top plate 36, the secondary top plate 33 has an additional upward displacement relative to the primary top plate 36, which in turn drives the ejector rod 31 to complete the secondary demolding. The guide rod 38 is fixed to the bottom of the die-casting mold 100 and passes through the guide seats 37 on both sides of the primary top plate 36 to ensure the verticality and stability of the ejection movement.

[0036] 1. This solution utilizes the cooperation between the secondary lever 39 and the interference seat 390 in the composite ejection mechanism 300. Under the premise that the stroke of the ejection cylinder 34 remains fixed, it uses the lever principle to generate an independent and adjustable secondary ejection displacement. This means that the total ejection stroke of the ejector rod 31 is no longer limited by the inherent stroke of the ejection cylinder 34. Instead, the secondary ejection distance can be flexibly changed by replacing the secondary lever 39 with different lever arm ratios or adjusting the installation position of the interference seat 390. This allows for compatibility with new energy vehicle parts of different thicknesses, different draft angles, and different ejection requirements, significantly improving the versatility of the die-casting mold 100. When it is necessary to change the production of parts of other sizes, there is no need to replace the ejection cylinder 34 or redesign the entire ejection mechanism. Simply adjusting the secondary lever 39 or the interference seat 390 is sufficient for quick adaptation, greatly facilitating changeover operations and reducing equipment modification costs and production preparation time.

[0037] 2. This solution achieves rapid plug-in replacement of the mold core by setting assembly slots 21 with dovetail-shaped alignment rails 24 in the static mold base 200 and the moving mold base 201, and cooperating with the alignment seat 23 on the assembly mold core 22. At the same time, the primary ejector plate 36 and the secondary ejector plate 33 in the compound ejection mechanism 300 adopt a graded transmission structure of limit rod 35 and secondary lever 39, which not only ensures the stability of conventional primary ejection, but also achieves secondary ejection without increasing the stroke of the ejection cylinder 34. This avoids the problem of the product being punctured due to excessive ejection stroke or unable to detach from the mold due to insufficient stroke. Moreover, the passive wheels A391 and B392 set at both ends of the secondary lever 39 reduce frictional resistance and ensure the smoothness and reliability of the secondary ejection action. Ultimately, the entire die-casting device can quickly respond to the production needs of different new energy vehicle parts. While improving the flexibility of the equipment, it ensures the complete demolding quality of the molded product and reduces the scrap rate caused by poor demolding. It has significant practical value and economic benefits.

[0038] like Figure 9 As shown: The compression column 43 drives the compression plate 48 to move downwards within the injection tube 42, actively compacting the material entering the die-casting mold 100. This compaction process forces air bubbles trapped during feeding or present in the molten material to be expelled upwards. Because the material's volume is reduced under the compression of the compression plate 48, the lower gas density escapes from the upper end of the injection tube 42 or the mold venting groove, thus significantly reducing defects such as porosity and shrinkage cavities inside the molded product. Simultaneously, the piston 47 is made of high-temperature resistant rubber and slides and seals against the inner wall of the injection tube 42, ensuring the compaction process... During the process, the material will not leak from the side of the compression column 43, preventing air from being re-inhaled; the force seat 46 and the pressure seat 44, together with the return spring 45, enable the compression plate 48 to automatically reset after compaction, facilitating the degassing and compaction again during the next feeding, thus achieving air bubble removal treatment of the material in each mold; compared with the traditional method of pushing material by gravity or injection head, this structure pre-completes degassing before the material enters the cavity, which is especially suitable for new energy vehicle parts with high airtightness requirements, such as housings and brackets, effectively improving the internal quality and mechanical properties of the product.

Claims

1. A die-casting device for new energy vehicle parts with easy mold core replacement, comprising a die-casting mold (100), characterized in that: The die-casting mold (100) is provided with a stationary mold base (200), and a moving mold base (201) is provided on the upper side of the stationary mold base (200). Both the moving mold base (201) and the stationary mold base (200) are provided with assembly slots (21), and assembly mold cores (22) are provided in the assembly slots (21). The bottom of the die-casting mold (100) is provided with a composite ejection mechanism (300), and the upper side of the die-casting mold (100) is provided with a compression feeding assembly (400). The compression feeding assembly (400) includes an injection pipe (42) installed on the moving mold base (201), and a hopper (41) is provided on the side wall of the injection pipe (42).

2. The die-casting device for new energy vehicle parts with easy mold core replacement according to claim 1, characterized in that: The assembly mold core (22) is provided with alignment seats (23) on both sides, and the assembly groove (21) is provided with alignment tracks (24) on both sides. The dimensions of the alignment tracks (24) and the alignment seats (23) are compatible, and the alignment seats (23) are inserted into the interior of the alignment tracks (24).

3. The die-casting device for new energy vehicle parts with easy mold core replacement according to claim 2, characterized in that: The alignment track (24) and alignment seat (23) are both dovetail-shaped structures, and the assembly mold core (22) in the moving mold seat (201) and the stationary mold seat (200) are both detachable structures.

4. The die-casting device for new energy vehicle parts with easy mold core replacement according to claim 1, characterized in that: The product formed in the stationary mold base (200) is ejected a second time by a composite ejection mechanism (300). The composite ejection mechanism (300) includes multiple sets of ejector rods (31) inserted in the stationary mold base (200), and the bottom of the multiple sets of ejector rods (31) is connected to a secondary ejector plate (33). At the same time, a primary ejector plate (36) is provided at the bottom of the secondary ejector plate (33). The primary ejector plate (36) and the secondary ejector plate (33) are both rectangular in structure, and the primary ejector plate (36) and the secondary ejector plate (33) are distributed in parallel.

5. A die-casting device for new energy vehicle parts with easy mold core replacement according to claim 4, characterized in that: The secondary top plate (33) is provided with limiting rods (35) on both sides of the bottom, and the limiting rods (35) are inserted into the limiting holes opened on the primary top plate (36). The composite ejection mechanism (300) also includes an ejection cylinder (34) fixed to the bottom of the die-casting mold (100), and the output end of the ejection cylinder (34) is connected to the primary top plate (36).

6. A die-casting device for new energy vehicle parts with easy mold core replacement according to claim 4, characterized in that: The primary top plate (36) is provided with secondary levers (39) on both sides, and the secondary levers (39) are provided with a fulcrum shaft (393) in the middle. The secondary levers (39) are rotatably connected to the primary top plate (36) through the fulcrum shaft (393) in the middle. The primary top plate (36) is also provided with guide seats (37) on both sides, and guide rods (38) are inserted in the guide seats (37). The guide rods (38) are fixed to the bottom of the die-casting mold (100).

7. A die-casting device for new energy vehicle parts with easy mold core replacement according to claim 6, characterized in that: The secondary lever (39) has an "L" shaped structure, and one end of the secondary lever (39) is rotatably connected to a passive wheel A (391), while the other end of the secondary lever (39) is rotatably connected to a passive wheel B (392). The composite ejection mechanism (300) also includes interference seats (390) fixed on both sides of the bottom of the stationary mold base (200), and the interference seats (390) and the passive wheel B (392) are distributed relative to each other.

8. A die-casting device for new energy vehicle parts with easy mold core replacement according to claim 6, characterized in that: The ejector rod (31) demolds the die-casting mold (100) once through the ejector cylinder (34), and the ejector rod (31) demolds the die-casting mold (100) a second time through the secondary lever (39).

9. A die-casting device for new energy vehicle parts with easy mold core replacement according to claim 1, characterized in that: The compression feeding assembly (400) also includes a compression column (43) that is movably inserted into the injection tube (42), and a piston (47) is provided at the end of the compression column (43). The piston (47) is slidably connected to the inner wall of the injection tube (42). The piston (47) is a cylindrical structure made of high temperature resistant rubber, and a compression plate (48) is provided on one side of the piston (47).

10. A die-casting device for new energy vehicle parts with easy mold core replacement according to claim 9, characterized in that: The inner wall of the injection tube (42) is provided with a force-bearing seat (46), and a pressure seat (44) is provided on the upper side of the force-bearing seat (46). The pressure seat (44) is fixed on the outside of the compression column (43), and a return spring (45) is provided between the force-bearing seat (46) and the compression column (43). The return spring (45) is sleeved on the outside of the compression column (43). The compression plate (48) moves downward to compact the material entering the die-casting mold (100).

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