Aluminum alloy automobile booster motor cover die-casting die

Abstract

The present application relates to die casting mould technical field, specifically to a kind of aluminium alloy automobile booster motor cover die casting mould, including lower mould and upper mould;Lower mould top is equipped with female mould core;Upper mould bottom is equipped with male mould core;Lower mould lifting activity is equipped with first lower top plate, second lower top plate and third lower top plate;First lower top plate is equipped with first lower ejector pin;Second lower top plate is equipped with second lower ejector pin;Third lower top plate is equipped with third lower ejector pin;Upper mould lifting activity is equipped with first upper top plate and second upper top plate;First upper top plate is equipped with first upper ejector pin;Second upper top plate is equipped with second upper ejector pin;First upper ejector pin and second upper ejector pin are all worn in male mould core.The present application is set by multiple top plate, ejector pin and spring in split type, can realize slag ladle, die casting and material head step-by-step orderly ejection in mold opening process, need not additional set subsequent cutting process, streamline production process, reduce special cutting equipment and manual input, adapt to the demand of automobile parts scale production.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, specifically to a die-casting mold for an aluminum alloy automotive power steering motor cover. Background Technology

[0002] With the rapid development of the new energy vehicle industry, aluminum alloys have become the core material for safety structural components such as power steering motor covers due to their advantages of being lightweight, high-strength, easy to form, and corrosion-resistant. High-pressure die casting is the mainstream forming process for such parts.

[0003] Existing die-casting molds for aluminum alloy power steering motor covers generally employ a synchronous ejection structure. After die casting, only the die-cast part, the slag head, and the slag bag can be ejected from the mold cavity simultaneously, making it impossible to effectively separate the three within the mold. In actual production, a dedicated cutting process must be set up to separate the slag head, slag bag, and die-cast part through secondary processing. This not only increases production steps, equipment investment, and labor costs, and prolongs the production cycle, but also easily causes surface scratches and edge deformation of the die-cast part during the cutting process, affecting product dimensional accuracy and yield.

[0004] Meanwhile, the scrap heads that can be directly recycled after being ejected are mixed with slag bags containing oxide impurities that cannot be directly recycled. They need to be sorted and purified before they can be recycled, which greatly reduces the efficiency of material reuse, increases raw material loss and production costs, and makes it difficult to meet the needs of large-scale, high-precision and low-cost mass production of automotive parts. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing an aluminum alloy automotive power steering motor cover die-casting mold.

[0006] The objective of this invention is achieved through the following technical solution: a die-casting mold for an aluminum alloy automotive power steering motor cover, comprising a lower mold and an upper mold; the top of the lower mold is provided with a concave mold core; the bottom of the upper mold is provided with a convex mold core that cooperates with the concave mold core; The lower mold is provided with a receiving cavity; a first lower top plate, a second lower top plate, and a third lower top plate are movably mounted within the receiving cavity; the first lower top plate is provided with a first lower ejector pin; the first lower ejector pin passes through the concave mold core and is used to abut against the bottom surface of the slag bag; the second lower top plate is provided with a second lower ejector pin; the second lower ejector pin passes through the concave mold core and is used to abut against the bottom surface of the die casting; the third lower top plate is provided with a third lower ejector pin; the third lower ejector pin passes through the concave mold core and is used to abut against the bottom surface of the slag head; The upper mold is provided with a first upper receiving groove and a second upper receiving groove; a first upper top plate is movably mounted in the first upper receiving groove; a second upper top plate is movably mounted in the second upper receiving groove; a first upper ejector pin is provided in the first upper top plate; a second upper ejector pin is provided in the second upper top plate; both the first and second upper ejector pins pass through the punch core; the first upper ejector pin is used to abut against the second lower ejector pin after passing through the die casting; the second upper ejector pin is used to abut against the top surface of the die head.

[0007] The present invention is further configured such that a first lower spring is provided between the bottom of the first lower top plate and the receiving cavity; a second lower spring is provided between the bottom of the second lower top plate and the receiving cavity; and a third lower spring is provided between the bottom of the third lower top plate and the receiving cavity.

[0008] The present invention is further configured such that a first upper spring is provided between the top of the first upper top plate and the first upper receiving groove; and a second upper spring is provided between the top of the second upper top plate and the second upper receiving groove.

[0009] The present invention is further configured such that the stiffness of the second upper spring is greater than the stiffness of the third lower spring; the stiffness of the third lower spring is greater than the stiffness of the first upper spring; the stiffness of the first upper spring is greater than the stiffness of the second lower spring; and the stiffness of the second lower spring is greater than the stiffness of the first lower spring.

[0010] The present invention is further configured such that the second lower ejector pin is movably inserted through the first lower top plate; and the third lower top plate is movably inserted through the first lower top plate.

[0011] The present invention is further configured such that a feeding rack is provided on one side of the lower mold; a feeding tray is movably provided on the feeding rack; a drive frame is provided on one side of the upper mold; and the drive frame is used to drive the feeding tray to move.

[0012] The present invention is further configured such that the feeding tray is provided with a hinged boss and a limiting boss; the hinged boss is rotatably mounted on the feeding frame; the feeding frame is provided with an arc-shaped limiting groove; and the limiting boss is movably mounted on the arc-shaped limiting groove.

[0013] The present invention is further configured such that the drive frame is provided with a drive groove extending along the height direction; the feed tray is provided with a drive boss; and the drive boss is movably disposed in the drive groove.

[0014] The present invention is further configured such that the driving groove includes a first straight segment, a second straight segment, and an inclined segment disposed between the first straight segment and the second straight segment.

[0015] The present invention is further configured such that the lower mold is provided with a guide post; the upper mold is movably inserted through the guide post.

[0016] The beneficial effects of the present invention are as follows: By setting multiple top plates, multiple ejector pins and multiple springs in a split manner, the present invention can realize the step-by-step orderly ejection of slag bag, die casting and material head during the mold opening process, without the need for additional subsequent cutting process, thus simplifying the production process, reducing the input of special cutting equipment and manpower, and adapting to the needs of large-scale mass production of automotive parts. Attached Figure Description

[0017] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a structural schematic diagram from another perspective of the present invention; Figure 4 This is a schematic diagram of the structure of the present invention in conjunction with the aluminum alloy automotive power steering motor cover; Figure 5 This is a cross-sectional view of the present invention in conjunction with an aluminum alloy automotive power steering motor cover; Figure 6 This is a cross-sectional view of the present invention in conjunction with an aluminum alloy automotive power steering motor cover; Wherein: 1. Lower mold; 11. Cavity core; 12. Receiving cavity; 13. Guide post; 2. First lower ejector plate; 21. First lower ejector pin; 22. First lower spring; 3. Second lower ejector plate; 31. Second lower ejector pin; 32. Second lower spring; 4. Third lower ejector plate; 41. Third lower ejector pin; 42. Third lower spring; 5. Upper mold; 51. Punch core; 52. First upper receiving groove; 62. Second upper receiving groove; 71. First upper ejector plate; 7 2. First upper ejector pin; 73. First upper spring; 74. Second upper ejector plate; 75. Second upper ejector pin; 76. Second upper spring; 81. Unloading rack; 811. Arc-shaped limiting groove; 82. Unloading tray; 821. Hinge boss; 822. Limiting boss; 823. Drive boss; 83. Drive frame; 831. First straight section; 832. Inclined section; 833. Second straight section; 91. Slag bag; 92. Die casting; 93. Material head. Detailed Implementation

[0019] The present invention will be further described in conjunction with the following embodiments.

[0020] Depend on Figures 1 to 6As can be seen, the aluminum alloy automotive power steering motor cover die casting mold described in this embodiment includes a lower mold 1 and an upper mold 5; the top of the lower mold 1 is provided with a concave mold core 11; the bottom of the upper mold 5 is provided with a convex mold core 51 that cooperates with the concave mold core 11; in the mold closing process, the upper mold 5 moves vertically downward, and the convex mold core 51 and the concave mold core 11 are precisely aligned and closed to form a closed die casting cavity that is completely matched with the automotive power steering motor cover product, the matching slag bag 91, and the pouring head 93; after the molten aluminum alloy liquid is injected into the closed cavity through the gating system, it is held under pressure and cooled in the cavity to form an integrated die casting part 92 with the pouring head 93 and the slag bag 91; The lower mold 1 is provided with a receiving cavity 12; a first lower top plate 2, a second lower top plate 3, and a third lower top plate 4 are movably mounted within the receiving cavity 12; the first lower top plate 2 is provided with a first lower ejector pin 21; the first lower ejector pin 21 passes through the concave mold core 11 and is used to abut against the bottom surface of the slag bag 91; the second lower top plate 3 is provided with a second lower ejector pin 31; the second lower ejector pin 31 passes through the concave mold core 11 and is used to abut against the bottom surface of the die-cast part 92; the third lower top plate 4 is provided with a third lower ejector pin 41; the third lower ejector pin 41 passes through the concave mold core 11 and is used to abut against the bottom surface of the sprue 93; mold closed forming state. Below, the first lower ejector plate 2, the second lower ejector plate 3, and the third lower ejector plate 4 are all in the initial downward position of the accommodating cavity 12. The top surfaces of the first lower ejector pin 21, the second lower ejector pin 31, and the third lower ejector pin 41 are flush with the bottom surfaces of the forming cavities of the slag pack 91, the die casting 92, and the sprue 93 in the concave mold core 11, respectively. During the mold opening process, the first lower ejector plate 2, the second lower ejector plate 3, and the third lower ejector plate 4 can move upward independently within the accommodating cavity 12, respectively driving the first lower ejector pin 21, the second lower ejector pin 31, and the third lower ejector pin 41 to perform ejection actions individually, thereby realizing the step-by-step independent ejection of the slag pack 91, the die casting 92, and the sprue 93. The upper mold 5 is provided with a first upper receiving groove 52 and a second upper receiving groove 62; a first upper top plate 71 is movably mounted in the first upper receiving groove 52; a second upper top plate 74 is movably mounted in the second upper receiving groove 62; the first upper top plate 71 is provided with a first upper ejector pin 72; the second upper top plate 74 is provided with a second upper ejector pin 75; both the first upper ejector pin 72 and the second upper ejector pin 75 pass through the punch core 51; the first upper ejector pin 72 is used to pass through the die casting part 92 and abut against the second lower ejector pin 31; the second upper ejector pin 75 is used to abut against the top surface of the sprue 93; in the mold closed state, the first upper ejector pin 72 passes through the punch core 51 and the die casting part 92. The through hole of part 92 abuts against the top surface of the second lower ejector pin 31, forming a bidirectional clamping and limiting of the die casting part 92. After the second upper ejector pin 75 passes through the punch core 51, the bottom surface of the second upper ejector pin 75 abuts tightly against the top surface of the sprue 93, forming a vertical limiting of the sprue 93. During the mold opening process, when the upper mold 5 moves upward, the first upper ejector plate 71 and the second upper ejector plate 74 can independently maintain the downward position in the corresponding first upper receiving groove 52 and the second upper receiving groove 62, respectively, so that the corresponding first upper ejector pin 72 and the second upper ejector pin 75 continuously limit the die casting part 92 and the sprue 93. With the ejection action of the lower ejector pin, the precise timing control of the step-by-step ejection is achieved.

[0021] This embodiment, by separately setting multiple top plates, multiple ejector pins and multiple springs, can realize the step-by-step orderly ejection of slag bag 91, die casting part 92 and material head 93 during the mold opening process, without the need for additional subsequent cutting process, thus simplifying the production process, reducing the input of special cutting equipment and manpower, and adapting to the needs of large-scale mass production of automotive parts.

[0022] This embodiment describes a die-casting mold for an aluminum alloy automotive power steering motor cover. A first lower spring 22 is provided between the bottom of the first lower top plate 2 and the accommodating cavity 12; a second lower spring 32 is provided between the bottom of the second lower top plate 3 and the accommodating cavity 12; and a third lower spring 42 is provided between the bottom of the third lower top plate 4 and the accommodating cavity 12. In the mold-closed state, the first lower spring 22, the second lower spring 32, and the third lower spring 42 are all in a compressed, energy-storing state. During mold opening, when the upper limit constraint of the corresponding ejector pin is released, the corresponding spring releases its elastic potential energy, pushing the corresponding lower top plate upwards, causing the corresponding ejector pin to complete the ejection action of the corresponding component. When the mold is closed and reset, the upper mold 5 moves downwards, and the corresponding ejector pin moves downwards under pressure from the cavity side, causing the corresponding lower top plate to compress the corresponding spring, returning to the initial energy-storing state, completing a single work cycle.

[0023] This embodiment describes a die-casting mold for an aluminum alloy automotive power steering motor cover. A first upper spring 73 is provided between the top of the first upper top plate 71 and the first upper receiving groove 52; a second upper spring 76 is provided between the top of the second upper top plate 74 and the second upper receiving groove 62. In the closed state, both the first upper spring 73 and the second upper spring 76 are in a compressed, energy-storing state. In the initial stage of mold opening, when the upper mold 5 moves upward, the first upper spring 73 and the second upper spring 76 release elastic potential energy, respectively pushing the first upper top plate 71 and the second upper top plate 74 to maintain a downward position, causing the first upper ejector pin 72 and the second upper ejector pin 75 to continuously abut against the die-cast part 92 and the sprue 93, achieving continuous limiting of both. When the first upper top plate 71 and the second upper top plate 74 move upward to the end of the stroke of the first upper receiving groove 52 and the second upper receiving groove 62, respectively, they move upward synchronously with the upper mold 5, releasing the limiting constraints on the corresponding components.

[0024] In this embodiment, an aluminum alloy automotive power steering motor cover die-casting mold is described, wherein the stiffness of the second upper spring 76 is greater than the stiffness of the third lower spring 42; the stiffness of the third lower spring 42 is greater than the stiffness of the first upper spring 73; the stiffness of the first upper spring 73 is greater than the stiffness of the second lower spring 32; and the stiffness of the second lower spring 32 is greater than the stiffness of the first lower spring 22. During the mold opening process, based on the gradient difference in stiffness of each spring, the elastic force decreases step by step in the order of the second upper spring 76, the third lower spring 42, the first upper spring 73, the second lower spring 32, and the first lower spring 22. When the mold moves upward, the first lower spring 22 with the least stiffness releases its elastic potential energy first, pushing the first lower ejector plate 2 upward to eject the slag bag 91. Then, the second lower spring 32 with the next less stiffness moves, pushing the second lower ejector plate 3 upward to eject the die casting 92. Finally, the third lower spring 42 moves to eject the sprue head 93. At the same time, the upper spring with greater stiffness can ensure that the corresponding upper ejector pin remains in a limited position within the preset stroke until the corresponding lower spring completes the ejection action.

[0025] In this embodiment, an aluminum alloy automotive power steering motor cover die-casting mold is described, wherein the second lower ejector pin 31 is movably inserted through the first lower top plate 2; and the third lower top plate 4 is movably inserted through the first lower top plate 2. When the first lower top plate 2 independently moves upward to eject the slag bag 91, the second lower ejector pin 31 and the third lower top plate 4 can move freely within the through hole of the first lower top plate 2, unaffected by the movement of the first lower top plate 2; when the second lower top plate 3 and the third lower top plate 4 subsequently move upward independently, they will not cause structural interference with the first lower top plate 2, ensuring that the movements of the three sets of ejection structures are completely independent and do not interfere with each other.

[0026] This embodiment describes a die-casting mold for an aluminum alloy automotive power steering motor cover. The lower mold 1 has a feeding rack 81 on one side; the feeding rack 81 is movably equipped with a feeding disc 82; the upper mold 5 has a drive frame 83 on one side; the drive frame 83 drives the feeding disc 82 to move. When the mold opens, the upper mold 5 moves upward, causing the drive frame 83 to move synchronously upward. During this upward movement, the drive frame 83 drives the feeding disc 82 to rotate on the feeding rack 81, causing the feeding disc 82 to rotate to a receiving position to receive the slag bag 91, die-cast part 92, and slag head 93 that have been ejected in stages. When the mold closes, the upper mold 5 moves downward, causing the drive frame 83 to move synchronously downward, driving the feeding disc 82 to rotate in the opposite direction and reset.

[0027] This embodiment describes a die-casting mold for an aluminum alloy automotive power steering motor cover. The unloading tray 82 is provided with a hinged boss 821 and a limiting boss 822. The hinged boss 821 is rotatably mounted on the unloading frame 81. The unloading frame 81 is provided with an arc-shaped limiting groove 811. The limiting boss 822 is movably mounted in the arc-shaped limiting groove 811. When the drive frame 83 drives the unloading tray 82 to move, the unloading tray 82 rotates about the hinged boss 821 as the center of rotation on the unloading frame 81, while the limiting boss 822 slides along the arc-shaped limiting groove 811 on the unloading frame 81. When the limiting boss 822 slides to both ends of the arc-shaped limiting groove 811, the unloading tray 82 stops rotating.

[0028] This embodiment of the aluminum alloy automotive power steering motor cover die-casting mold includes a drive frame 83 with a drive groove extending along the height direction; a feed tray 82 with a drive boss 823; and the drive boss 823 movably disposed in the drive groove. The drive groove includes a first straight segment 831, a second straight segment 833, and an inclined segment 832 disposed between the first straight segment 831 and the second straight segment 833. Specifically, the drive groove moves vertically and linearly in sync with the drive frame 83 and the upper mold 5. The drive boss 823 is embedded in the drive groove and forms a sliding fit with the inner wall of the drive groove. When the drive frame 83 moves vertically, the inner wall of the drive groove applies a lateral driving force to the drive boss 823, causing the drive boss 823 to move along the preset trajectory of the drive groove. This transforms the vertical linear motion of the upper mold 5 into the rotational motion of the unloading plate 82 around the hinged boss 821. Especially in the inclined section 832 of the drive groove, the continuous upward motion of the upper mold 5 is transformed into the continuous fixed-axis rotation of the unloading plate 82, so that the unloading plate 82 and the step-by-step ejection sequence form a synchronous angle change, thereby realizing the partitioned unloading of the slag bag 91, the die casting 92 and the material head 93.

[0029] This embodiment describes a die-casting mold for an aluminum alloy automotive power steering motor cover. The lower mold 1 is equipped with a guide post 13, and the upper mold 5 is movably inserted through the guide post 13. The precise guiding design of the guide post 13 ensures the mold closing accuracy between the upper mold 5 and the lower mold 1, avoids misalignment between the concave mold core 11 and the convex mold core 51, and ensures the forming dimensional accuracy of the die-cast part 92.

[0030] Specifically, the overall working process of the aluminum alloy automotive power steering motor cover die-casting mold described in this embodiment is as follows: During the mold closing and die casting stages, the upper mold 5 descends precisely vertically along the guide post 13, and the punch core 51 and the concave mold core 11 align and close, forming a closed die casting cavity that perfectly matches the aluminum alloy automotive power steering motor cover product, the matching slag bag 91, and the casting head 93. After mold closing, the molten aluminum alloy is injected into the closed cavity through the gating system. After pressure holding and cooling processes, it is formed in the cavity into an integrated motor cover die casting 92 with the casting head 93 and the slag bag 91. In this state, the first... The top surfaces of the first ejector pin 21, the second ejector pin 31, and the third ejector pin 41 are flush with the bottom surfaces of the slag pack 91, the die casting 92, and the sprue 93 in the die core 11, respectively. The first upper ejector pin 72 passes through the through hole of the die casting 92 and precisely abuts against the top surface of the second ejector pin 31, forming a bidirectional clamping of the die casting 92. The bottom surface of the second upper ejector pin 75 abuts tightly against the top surface of the sprue 93, forming a vertical limit on the sprue 93. All springs are in a compressed and stored energy state.

[0031] Then, during mold opening, the upper mold 5 moves upward along the guide post 13. In the initial stage of the upper mold 5's upward movement, the punch core 51 first separates synchronously with the top surface of the sprue 93, slag bag 91, and die casting 92. At this time, the second upper spring 76, which has the greatest stiffness, and the second largest first upper spring 73, continuously release elastic potential energy, pushing the first upper ejector pin 72 and the second upper ejector pin 75 to maintain their downward position, continuously vertically limiting the die casting 92 and sprue 93, keeping them stationary. Meanwhile, the first lower spring 22, which has the least stiffness, releases elastic potential energy first, pushing... The first lower top plate 2 moves upward, driving the first lower ejector pin 21 to push the slag bag 91, which has lost its top surface support, upward, realizing the in-situ separation of the slag bag 91 from the die casting 92 and the material head 93; during this process, the drive boss 823 moves upward with the upper mold 5 and enters the starting end of the inclined section 832 of the drive groove, driving the material unloading plate 82 to rotate to the first preset inclined angle, and after the ejected slag bag 91 falls into the material unloading plate 82, it slides down along the first preset inclined angle to the dedicated collection area of ​​the slag bag 91, completing the independent partitioning and unloading of the slag bag 91.

[0032] As the upper mold 5 continues to move upward, the first upper spring 73 reaches its travel limit, and the first upper top plate 71 moves upward synchronously with the upper mold 5, causing the first upper ejector pin 72 to exit the through hole of the die-casting part 92, thus releasing the vertical restriction on the die-casting part 92. At this time, the second lower spring 32, which has the next highest stiffness, releases its elastic potential energy, pushing the second lower top plate 3 upward, causing the second lower ejector pin 31 to push the die-casting part 92 upward, achieving in-situ separation of the die-casting part 92 from the material head 93. During this process, the second upper spring 76 maintains elastic support, and the second upper ejector pin 75 continues to press against the top surface of the material head 93, keeping the material head 93 stationary. During this process, the drive boss 823 continues to move upward along the inclined section 832 of the drive groove, causing the unloading plate 82 to rotate to the second preset inclination angle. After the finished die-casting part 92 is ejected and falls into the unloading plate 82, it slides down along the second preset inclination angle to the finished product collection area, completing the independent partitioning and unloading of the die-casting part 92.

[0033] As the upper mold 5 continues to move upward, the second upper spring 76 reaches its travel limit, and the second upper top plate 74 moves upward synchronously with the upper mold 5, causing the second upper ejector pin 75 to separate from the top surface of the material head 93, thus releasing the vertical restriction on the material head 93. At this time, the third lower spring 42 releases its elastic potential energy, pushing the third lower top plate 4 upward, causing the third lower ejector pin 41 to push the material head 93 upward, completing the independent discharge of the material head 93. During this process, the drive boss 823 moves upward along the inclined section 832 of the drive groove to the end, causing the material tray 82 to rotate to the third preset inclined angle, ejecting the fallen material head 93. After falling into the material tray 82, the material head 93 slides down along the third preset inclined angle to the dedicated recycling area for the material head 93, completing the independent partitioned discharge of the material head 93. At this time, the drive boss 823 enters the second straight section 833 of the drive groove, and the material tray 82 remains stationary at the third preset angle, completing all partitioned discharge actions.

[0034] After a single die-casting cycle is completed, the upper mold 5 moves down along the guide post 13 to close the mold, and the drive frame 83 moves down accordingly. The drive boss 823 moves in the opposite direction along the drive groove, causing the unloading plate 82 to rotate in the opposite direction and reset to the initial position. During the downward movement, each ejector pin is subjected to the reverse pressure on the cavity side, which causes the corresponding ejector plate to compress the corresponding spring. All ejector plates and ejector pins return to the initial position of mold closing, completing a single working cycle and preparing for the next die-casting molding.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A die-casting mold for an aluminum alloy automotive power steering motor cover, characterized in that: It includes a lower mold (1) and an upper mold (5); the lower mold (1) is provided with a concave mold core (11) at the top; the upper mold (5) is provided with a convex mold core (51) at the bottom that cooperates with the concave mold core (11); The lower mold (1) is provided with a receiving cavity (12); the receiving cavity (12) is provided with a first lower top plate (2), a second lower top plate (3) and a third lower top plate (4) that can be raised and lowered; the first lower top plate (2) is provided with a first lower ejector pin (21); the first lower ejector pin (21) passes through the concave mold core (11) and is used to abut against the bottom surface of the slag bag (91); the second lower top plate (3) is provided with a second lower ejector pin (31); the second lower ejector pin (31) passes through the concave mold core (11) and is used to abut against the bottom surface of the die casting (92); the third lower top plate (4) is provided with a third lower ejector pin (41); the third lower ejector pin (41) passes through the concave mold core (11) and is used to abut against the bottom surface of the slurry head (93); The upper mold (5) is provided with a first upper receiving groove (52) and a second upper receiving groove (62); a first upper top plate (71) is movably mounted in the first upper receiving groove (52); a second upper top plate (74) is movably mounted in the second upper receiving groove (62); a first upper ejector pin (72) is provided in the first upper top plate (71); a second upper ejector pin (75) is provided in the second upper top plate (74); both the first upper ejector pin (72) and the second upper ejector pin (75) pass through the punch core (51); the first upper ejector pin (72) is used to pass through the die casting (92) and abut against the second lower ejector pin (31); the second upper ejector pin (75) is used to abut against the top surface of the sprue (93); A first lower spring (22) is provided between the bottom of the first lower top plate (2) and the accommodating cavity (12); a second lower spring (32) is provided between the bottom of the second lower top plate (3) and the accommodating cavity (12); a third lower spring (42) is provided between the bottom of the third lower top plate (4) and the accommodating cavity (12). A first upper spring (73) is provided between the top of the first upper top plate (71) and the first upper receiving groove (52); a second upper spring (76) is provided between the top of the second upper top plate (74) and the second upper receiving groove (62); The stiffness of the second upper spring (76) is greater than that of the third lower spring (42); the stiffness of the third lower spring (42) is greater than that of the first upper spring (73); the stiffness of the first upper spring (73) is greater than that of the second lower spring (32); the stiffness of the second lower spring (32) is greater than that of the first lower spring (22). The second lower ejector pin (31) is movably inserted through the first lower top plate (2); the third lower top plate (4) is movably inserted through the first lower top plate (2).

2. The die-casting mold for an aluminum alloy automotive power steering motor cover according to claim 1, characterized in that: The lower mold (1) is provided with a feeding rack (81) on one side; the feeding rack (81) is movably provided with a feeding tray (82); the upper mold (5) is provided with a drive frame (83) on one side; the drive frame (83) is used to drive the feeding tray (82) to move.

3. The die-casting mold for an aluminum alloy automotive power steering motor cover according to claim 2, characterized in that: The feeding tray (82) is provided with a hinged boss (821) and a limiting boss (822); the hinged boss (821) is rotatably mounted on the feeding frame (81); the feeding frame (81) is provided with an arc-shaped limiting groove (811); the limiting boss (822) is movably mounted in the arc-shaped limiting groove (811).

4. The die-casting mold for an aluminum alloy automotive power steering motor cover according to claim 3, characterized in that: The drive frame (83) is provided with a drive groove extending along the height direction; the feed tray (82) is provided with a drive boss (823); the drive boss (823) is movably disposed in the drive groove.

5. The aluminum alloy automotive power steering motor cover die-casting mold according to claim 4, characterized in that: The drive groove includes a first straight segment (831), a second straight segment (833), and an inclined segment (832) disposed between the first straight segment (831) and the second straight segment (833).

6. The die-casting mold for an aluminum alloy automotive power steering motor cover according to claim 1, characterized in that: The lower mold (1) is provided with a guide post (13); the upper mold (5) is movably inserted through the guide post (13).

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