An ejector mechanism for automobile engine casting molds

Abstract

This invention provides an ejector mechanism for an automotive engine casting mold, belonging to the field of metal casting technology. The ejector mechanism includes a frame and a platform above the frame. A pressing mechanism is provided on the upper surface of the platform. When the pressing mechanism closes, it forms a mold cavity for casting. A support plate that can slide up and down is provided on the frame, and an ejector rod is mounted on the support plate. A through hole is provided on the platform, and a guide hole communicating with the through hole is provided on the pressing mechanism. The ejector rod passes through the guide hole and the through hole, penetrating the platform and the pressing mechanism to the interior of the mold cavity, for demolding the casting. The support plate drives the ejector rod to move up and down, sending cold air into the cavity through a flow channel to cool the bottom of the casting and the ejector rod, preventing deformation of the casting bottom when the ejector rod ejects the casting and preventing deformation of the ejector rod due to frequent heating.

Description

Technical Field

[0001] This invention belongs to the field of metal casting technology, and specifically relates to an ejector mechanism for automobile engine casting molds. Background Art

[0002] The ejector mechanism of an automotive engine casting mold is one of the core components in casting production. Its role is involved in the entire process of casting, demolding, and subsequent processing, directly affecting the quality of the casting, production efficiency, and mold life.

[0003] Chinese patent CN118287661B discloses a refractory metal casting mold and casting method, including a casting table. The top of the casting table has several mounting holes, and a lower casting mold is fixedly connected to each mounting hole. An upper casting mold is located above the lower casting mold. The casting table is equipped with a lifting unit that cooperates with the upper casting molds. A first rotating shaft is located above the casting table, and a driver that cooperates with the first rotating shaft is installed on the casting table. This method eliminates the need for workers to constantly monitor whether the ejector rod is ejecting the casting; the casting can be directly moved to the unloading station, ensuring efficient unloading. It also reduces the workload of workers by eliminating the need for them to maintain a high level of concentration.

[0004] However, the above-mentioned technical solution still has the following problems. When the required casting metal is ejected from the mold, due to the different complexity of the mold and the casting structure design, the ejector rod of the ejector mechanism is easily deformed by frequent heating because the metal has not been completely cooled during ejection. It may also deform or even puncture the contact surface of the casting. In addition, the casting is easy to stick to the ejector rod when it is ejected, resulting in some metal remaining on the top of the ejector rod when it is removed, which leads to an increase in defective products and a shortened life of the ejector rod. Summary of the Invention

[0005] The purpose of this invention is to provide an ejector mechanism for automobile engine casting molds, which aims to solve the problems in the prior art where the ejector rod is frequently heated and deformed when the casting is ejected by the ejector mechanism, and the contact surface of the casting is deformed or even punctured.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ejector mechanism for an automobile engine casting mold, comprising: a frame and a platform located above the frame; a pressing mechanism is provided on the upper surface of the platform; when the pressing mechanism closes, it can form a mold cavity for casting; a support plate that can slide up and down is provided on the frame; an ejector rod is installed on the support plate; a through hole is provided on the platform; a guide hole communicating with the through hole is provided on the pressing mechanism; the ejector rod passes through the platform and the pressing mechanism through the guide hole and the through hole to the interior of the mold cavity for demolding the casting; a flow channel is formed between the guide hole and the through hole and the ejector rod; and the top of the guide hole has a constriction; a conical block that cooperates with the constriction and can seal the flow channel is provided on the top of the ejector rod; the cavity in the cooling mechanism is connected to the flow channel; when the conical block disengages from the constriction, the flow channel opens, allowing cold air inside the cooling mechanism to enter the mold cavity.

[0007] A further technical solution of the present invention is that the push rod is rotatably mounted on the support plate, a spiral groove is provided on the push rod along its length direction, a lifting plate is provided above the support plate, a through hole is provided on the lifting plate, the push rod slides up and down in the through hole, a sliding column adapted to the spiral groove is provided on the inner wall of the through hole, and a fourth hydraulic cylinder is provided on the support plate to drive the lifting plate to slide on the push rod. When the lifting plate moves up and down relative to the push rod, it drives the push rod to rotate.

[0008] A further technical solution of the present invention is that the molding mechanism includes a plurality of side molds perpendicular to the table surface, a top mold is provided above the side molds, a bottom mold is provided below the side molds, the bottom mold is fixed on the table surface, a first hydraulic cylinder is provided on the table surface to drive the side molds to move closer or further away from each other, and a second hydraulic cylinder is provided on the top of the frame to drive the top mold to move closer or further away from the bottom mold. When the top mold, side molds and bottom molds come together, an injection molding cavity can be formed.

[0009] A further technical solution of the present invention is that a slider is provided below the side mold, and the slider extends through a long groove to the bottom of the table. A first inclined block and a second inclined block are arranged sequentially from top to bottom at the bottom of the slider. The bottom surface of the first inclined block is parallel to the upper surface of the support plate. A third hydraulic cylinder is installed at the bottom of the frame to drive the support plate away from or towards the table. When the support plate moves downward away from the table, the support plate contacts the inclined surface of the second inclined block and pushes the side mold away from the support plate.

[0010] A further technical solution of the present invention is that the cooling mechanism is provided with an air inlet hole, which is connected to the cavity. The cooling mechanism has air holes on its upper and lower bottom surfaces. The air holes on the lower bottom surface have the same diameter as the top rod, which ensures sealing when the top rod slides. There is a gap between the air holes on the upper bottom surface and the top rod, and the air holes on the upper bottom surface are connected to the flow channel.

[0011] A further technical solution of the present invention is that the side mold is provided with a square cavity, and a square block that slides along the square cavity is provided on the first hydraulic cylinder.

[0012] A further technical solution of the present invention is that a guide groove is provided on the support plate, and a limiting block that can move along the guide groove is provided at the bottom of the lifting plate.

[0013] A further technical solution of the present invention is that one end of the top rod is provided with a protrusion, the protrusion is close to the support plate and is cylindrical, and the upper surface of the support plate is provided with a limiting groove for restricting the movement of the protrusion. When the limiting block slides up and down along the guide groove, the lifting plate can slide on the top rod, so that the top rod rotates along the fixed axis of the limiting groove.

[0014] A further technical solution of the present invention is that the cooling mechanism is configured as a cooling pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The support plate drives the ejector pin to move up and down, sending cold air into the cavity through the flow channel to cool the bottom of the casting and the ejector pin. This ensures that the bottom of the casting is completely cooled and solidified, preventing deformation of the bottom of the casting when the ejector pin ejects the casting and preventing deformation of the ejector pin due to frequent heating. At the same time, it ensures the air pressure balance inside and outside the mold cavity, facilitating demolding.

[0017] 2. Before the lifting plate moves up and down, it rotates the lifting rod to separate the lifting rod from the bottom surface of the casting. This prevents the two from sticking together when the casting is removed directly, thus avoiding the need for frequent cleaning of the lifting rod and ensuring higher forming quality of the casting. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention;

[0020] Figure 2 This is an overall transverse isometric sectional view of a specific embodiment of the present invention;

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0022] Figure 4 This is a schematic diagram of a specific embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the side mold structure in a specific embodiment of the present invention;

[0024] Figure 6 This is a transverse isometric sectional view of a specific embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the top material mechanism structure in a specific embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the support plate and top rod in a specific embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the lifting plate in a specific embodiment of the present invention;

[0028] Figure 10 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0029] In the diagram: 1. Frame; 11. Table; 111. First hydraulic cylinder; 1111. Square block; 112. Long groove; 113. Through hole; 12. Second hydraulic cylinder; 13. Third hydraulic cylinder; 2. Pressing mechanism; 21. Bottom mold; 211. Guide hole; 22. Top mold; 23. Side mold; 231. Slider; 2311. First inclined block; 2312. Second inclined block; 232. Square cavity; 3. Ejection mechanism; 31. Support plate; 311. Guide groove; 312. Fourth hydraulic cylinder; 313. Limiting groove; 32. Ejector rod; 321. Spiral groove; 322. Protrusion; 323. Conical block; 33. Lifting plate; 331. Limiting block; 332. Through hole; 3321. Sliding column; 4. Cooling mechanism; 41. Cavity; 42. Air inlet; 43. Air hole. Detailed Implementation

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Please see Figures 1-9 The present invention provides the following technical solution: an ejector mechanism for an automobile engine casting mold, comprising a frame 1, a pressing mechanism 2, an ejector mechanism 3, and a cooling mechanism 4;

[0032] The frame 1 is placed horizontally on the ground. The molding mechanism 2 is mounted on the frame 1. When casting the engine, the molding mechanism 2 is first closed and sealed. After closure, molten metal is introduced into the molding mechanism 2 and cast into the engine structure. After the metal solidifies, the molding mechanism 2 is opened, at which point the metal surface has completely solidified. The ejector mechanism 3 is mounted on the frame 1 and positioned below the molding mechanism 2. When the molding mechanism 2 is opened, the ejector mechanism 3 lifts the already cast engine part placed on the molding mechanism 2 upwards, completely detaching it from the molding mechanism 2.

[0033] The cooling mechanism 4 is installed on the frame 1, located between the pressing mechanism 2 and the ejector mechanism 3. When the ejector mechanism 3 lifts the engine casting, the cooling mechanism 4 vents and cools the lower surface of the engine casting and the ejector mechanism 3 to prevent the lower surface from being deformed due to incomplete cooling and hardening of the casting when it is lifted upwards. At the same time, it prevents the temperature at the contact point between the ejector mechanism 3 and the casting from being too high and deformed due to excessive pressure.

[0034] Please see Figure 2 , Figure 4 , Figure 5 and Figure 6 The frame 1 is provided with a platform 11. The molding mechanism 2 includes a bottom mold 21 installed on the upper surface of the platform 11. A top mold 22 is provided above the bottom mold 21. The top mold 22 and the bottom mold 21 are parallel to each other. A side mold 23 is provided between the top mold 22 and the bottom mold 21. The side mold 23 is perpendicular to the bottom mold 21. In this embodiment, four side molds 23 are provided. When the top mold 22 and the side molds 23 move towards the bottom mold 21, they can dock with each other and completely close to form a mold cavity for casting the engine. The top mold 22 is provided with a liquid injection port for injecting liquid metal into the mold.

[0035] A first hydraulic cylinder 111, matching the number of side molds 23, is installed above the platform 11. The output end of the first hydraulic cylinder 111 is connected to the side of the side mold 23 away from the bottom mold 21. The first hydraulic cylinder 111 drives the side molds 23 to move closer or further away from each other. When they move closer, they can form a complete mold cavity. Multiple sets of long grooves 112 are provided on the platform 11 along the moving direction of the side molds 23. The long grooves 112 penetrate the platform 11 vertically. Two sliders 231 are provided at the bottom of the side molds 23, penetrating the long grooves 112 and slidingly connected along their length. The two sliders 231 are symmetrically arranged on both sides of the bottom of the side molds 23, ensuring that the sliders 231 can move back and forth along the length of the long grooves 112. When the sliders 231 are close to the bottom mold 21, they form a closed cavity. When they are far away from the bottom mold 21, the mold is opened. A second hydraulic cylinder 12 is installed on the top of the frame 1. The output end of the second hydraulic cylinder 12 is connected to the side of the top mold 22 away from the bottom mold 21. The top mold 22 is driven away from or closer to the bottom mold 21 by the second hydraulic cylinder 12 to achieve mold closing or mold opening.

[0036] Please see Figure 2 , Figure 6 and Figure 7 The ejector mechanism 3 includes a support plate 31, an ejector rod 32, and a lifting plate 33. The support plate 31 is located below the table 11 and parallel to the bottom mold 21. Two third hydraulic cylinders 13 are installed at the bottom of the frame 1, and the output end of the third hydraulic cylinder 13 is connected to the side of the support plate 31 away from the table 11. The two third hydraulic cylinders 13 are symmetrically arranged on both sides of the bottom surface of the support plate 31 and can synchronously control the up and down movement of the support plate 31. The ejector rod 32 is installed on the upper surface of the support plate 31 and can rotate along its axial direction. After the engine casting is cast, it is lifted by the ejector rod 32. Multiple sets of ejector rods 32 are evenly arranged to ensure that the engine casting receives a uniform upward thrust. The lifting plate 33 is installed above the support plate 31. The ejector rod 32 passes through the lifting plate 33 and causes the lifting plate 33 to slide along the length of the ejector rod 32. The lifting plate 33 slides on the ejector rod 32, causing the ejector rod 32 to rotate.

[0037] See Figures 7-10 The support plate 31 has a guide groove 311. A limiting block 331, capable of moving up and down along the guide groove 311, is installed at the bottom of the lifting plate 33. A fourth hydraulic cylinder 312 is installed at the bottom of the support plate 31, and its output end is connected to the limiting block 331. The limiting block 331 is driven to move up and down along the guide groove 311 by the fourth hydraulic cylinder 312. The lifting plate 33 has multiple through holes 332, the diameter of which matches that of the push rod 32. The lifting plate 33 passes through the through hole 332, allowing the lifting plate 33 to slide freely up and down along the main body of the top rod 32. The outer wall of the top rod 32 is provided with a spiral groove 321, which is spirally arranged along the length of the top rod 32. The inner wall of the through hole 332 is provided with a sliding column 3321 that slides freely along the spiral groove 321. This design ensures that when the lifting plate 33 slides on the top rod 32, the sliding column 3321 moves up and down along the spiral groove 321, driving the top rod 32 to rotate on a fixed axis.

[0038] The push rod 32 has a protrusion 322 near the support plate 31. The protrusion 322 is cylindrical and its diameter is slightly larger than that of the push rod 32. The upper surface of the support plate 31 has a limiting groove 313. The limiting groove 313 can cooperate with the push rod 32 and the protrusion 322 and limit them, so that the push rod 32 can only rotate along the limiting groove 313. When the lifting plate 33 slides on the push rod 32 and drives the push rod 32 to rotate, the top of the push rod 32 begins to rotate and causes it to detach from the contact position with the bottom surface of the engine casting. Shear force is generated between the top of the push rod 32 and the metal bottom surface, which breaks its adhesion. The contact area between the top of the push rod 32 and the air increases, which accelerates heat dissipation, reduces the temperature of the contact area, and prevents re-adhesion when it is ejected.

[0039] See Figure 2 and Figure 3 The cooling mechanism 4 is located at the bottom of the platform 11. It has an internal cavity 41 and an air inlet 42 on its side. Cold air enters the cavity 41 through the air inlet 42. The air inlet 42 is connected to the internal cavity 41 of the cooling mechanism 4. The cooling mechanism 4 has air holes 43 on its upper and lower sides. The number of air holes 43 is matched with the number of top rods 32. The bottom air holes 43 are the same diameter as the main body of the top rod 32 and coincide with it. The bottom air holes 43 are sealed by the top rod 32 to prevent gas leakage due to poor sealing when the top rod 32 slides on the bottom air holes 43. In this embodiment, the cooling mechanism 4 is set as a cooling pipe.

[0040] The bottom mold 21 has guide holes 211, which are the same number as the ejector pins 32 and are coaxially arranged with them. The platform 11 has multiple through holes 113, which have the same lower diameter as the guide holes 211, are located at the same position, and are interconnected. The diameter of the air hole 43 on the upper bottom surface is the same as the diameter of the through holes 113 and coincides with it, meaning that the air hole 43 on the upper bottom surface is larger than the air hole 43 on the lower bottom surface. There are gaps between the guide holes 211, the through holes 113, and the air hole 43 on the upper bottom surface and the ejector pins 32, forming an annular flow channel.

[0041] The ejector pin 32 passes through the cavity 41, the platform 11, and the bottom mold 21 via the air hole 43, the through hole 113, and the guide hole 211 into the interior of the mold cavity, and is flush with the inner bottom wall of the mold cavity. A conical block 323 is provided at the top of the ejector pin 32, the upper surface of which is flush with the bottom surface of the mold cavity of the bottom mold 21, and the top diameter of the conical block 323 is larger than the bottom diameter. The top of the guide hole 211 is provided with a constriction, which works in conjunction with the conical block 323. When the conical block 323 is located at the constriction, it can seal the top of the guide hole 211 to prevent liquid leakage. When the conical block 323 is located above or below the constriction, the flow channel is opened, and the gas from the cooling mechanism 4 can enter the interior of the mold cavity through the flow channel.

[0042] After the lifting plate 33 slides along the top rod 32 to rotate the top rod 32 by a certain angle, the third hydraulic cylinder 13 drives the support plate 31 and the top rod 32 to move downward. When the conical block 323 moves downward and disengages from the constriction, the guide hole 211 connects with the interior of the mold cavity and cold air is introduced into the cavity 41 through the air inlet 42. At this time, the cold air directly contacts the engine casting through the flow channel, which accelerates the cooling of the bottom surface of the casting and the top rod 32, and prevents the bottom surface of the casting from deforming at the lifted position or the top rod 32 from deforming due to excessive temperature and excessive force when the casting is lifted upward. Then, drive the push rod 32 to move upward. When the conical block 323 extends fully upward through the through hole 113, the casting has already been pushed upward a certain distance. Continue to introduce cold air into the middle of the bottom surface of the casting and the mold cavity of the bottom mold 21 to accelerate the cooling of the bottom surface of the casting. At the same time, prevent the deep cavity or cross hole structure on the bottom mold 21 from forming negative pressure when the casting moves upward, which would cause the part to stick to the mold core, making it difficult to demold or requiring a larger pushing force to demold.

[0043] Please see Figures 4-6 The bottom of the slider 231 is provided with a first inclined block 2311 and a second inclined block 2312 from top to bottom. The bottom surface of the first inclined block 2311 is parallel to the upper surface of the support plate 31, and after the mold is closed, it is located above the support plate 31 and in contact with its upper surface. The first inclined block 2311 and the second inclined block 2312 are spaced apart by a distance, so that the support plate 31 can be locked between the first inclined block 2311 and the second inclined block 2312. When the side mold 23 closes to the bottom mold 21, the slider 231 moves towards the support plate 31. When the side mold 23 and the bottom mold 21 are completely closed, the first inclined block 2311 moves above the support plate 31, and the second inclined block 2312 moves below the support plate 31. The bottom plane of the first inclined block 2311 can restrict the upward movement of the support plate 31, preventing the casting from being damaged before the ejector mechanism 3 opens. When the support plate 31 moves downward, the support plate 31 contacts the inclined surface of the second inclined block 2312 and pushes the slider 231 to move away from the support plate 31.

[0044] The side mold 23 has a square cavity 232 near the first hydraulic cylinder 111. A square block 1111, which slides within the square cavity 232, is located at the output end of the first hydraulic cylinder 111. The square block 1111 reciprocates within the square cavity 232 along the direction of movement of the side mold 23. Before the ejector rod 32 rotates and moves downward, the first hydraulic cylinder 111 drives the square block 1111 to move a certain distance away from the support plate 31 along the inside of the square cavity 232, then stops, allowing for initial demolding of the side mold 23. Subsequently, the third hydraulic cylinder 13 drives the support plate 31 to move downward. At this time, the support plate 31 contacts the upper inclined surface of the second inclined block 2312 and presses the slider 231 to move away from the support plate 31, completing demolding from the side of the casting and preventing deformation of the casting due to asynchronous movement of the side mold 23 during side demolding. After the support plate 31 moves downward a certain distance, the first hydraulic cylinder 111 begins to drive the side mold 23 to move away from the casting, ensuring normal subsequent demolding of the casting.

Claims

1. An ejector mechanism for an automobile engine casting mold, comprising: The frame (1) and the platform (11) located above the frame (1) are characterized in that a molding mechanism (2) is provided on the upper surface of the platform (11), the molding mechanism (2) includes a plurality of side molds (23) perpendicular to the platform (11), and when the molding mechanism (2) closes, it can form a mold cavity for casting. A support plate (31) that can slide up and down is provided on the frame (1), and a push rod (32) is installed on the support plate (31). A through-hole is opened on the platform (11). Hole (113), the pressing mechanism (2) has a guide hole (211) that communicates with the through hole (113), the ejector rod (32) passes through the guide hole (211) and the through hole (113) to the inside of the mold cavity through the table (11) and the pressing mechanism (2) to demold the casting. A flow channel is formed between the guide hole (211) and the through hole (113) and the ejector rod (32), and the top of the guide hole (211) has a narrowing. The top of the ejector rod (32) is provided with There is a conical block (323) that cooperates with the constriction and can seal the flow channel. The cavity (41) in the cooling mechanism (4) is connected to the flow channel. When the conical block (323) disengages from the constriction, the flow channel opens, allowing the cold air inside the cooling mechanism (4) to enter the mold cavity. A slider (231) is provided below the side mold (23). The slider (231) passes through the long groove (112) to the bottom of the table (11). At the bottom of the slider (231) from top to bottom... The machine frame (1) is provided with a first inclined block (2311) and a second inclined block (2312) in sequence. The bottom surface of the first inclined block (2311) is parallel to the upper surface of the support plate (31). A third hydraulic cylinder (13) is installed at the bottom of the frame (1) to drive the support plate (31) away from or near the table (11). When the support plate (31) moves downward away from the table (11), the support plate (31) contacts the inclined surface of the second inclined block (2312) and pushes the side mold (23) away from the support plate (31).

2. The ejector mechanism for an automobile engine casting mold according to claim 1, characterized in that: The top rod (32) is rotatably mounted on the support plate (31). A spiral groove (321) is provided on the top rod (32) along its length direction. A lifting plate (33) is provided above the support plate (31). A through hole (332) is provided on the lifting plate (33). The top rod (32) slides up and down in the through hole (332). A sliding column (3321) adapted to the spiral groove (321) is provided on the inner wall of the through hole (332). A fourth hydraulic cylinder (312) is provided on the support plate (31) to drive the lifting plate (33) to slide on the top rod (32). When the lifting plate (33) moves up and down relative to the top rod (32), it drives the top rod (32) to rotate.

3. The ejector mechanism for an automobile engine casting mold according to claim 1, characterized in that: A top mold (22) is provided above the side mold (23), and a bottom mold (21) is provided below the side mold (23). The bottom mold (21) is fixed on the table (11). A first hydraulic cylinder (111) is provided on the table (11) to drive the side molds (23) to move closer or further away from each other. A second hydraulic cylinder (12) is provided on the top of the frame (1) to drive the top mold (22) to move closer or further away from the bottom mold (21). When the top mold (22), the side mold (23) and the bottom mold (21) come together, they can form an injection cavity.

4. The ejector mechanism for an automobile engine casting mold according to claim 1, characterized in that: The cooling mechanism (4) is provided with an air inlet (42), which is connected to the cavity (41). The cooling mechanism (4) has air holes (43) on its upper and lower bottom surfaces. The air hole (43) on the lower bottom surface has the same diameter as the top rod (32) to ensure sealing when the top rod (32) slides. There is a gap between the air hole (43) on the upper bottom surface and the top rod (32). The air hole (43) on the upper bottom surface is connected to the flow channel.

5. The ejector mechanism for an automobile engine casting mold according to claim 3, characterized in that: The side mold (23) is provided with a square cavity (232), and a square block (1111) is provided on the first hydraulic cylinder (111) to slide along the square cavity (232).

6. The ejector mechanism for an automobile engine casting mold according to claim 2, characterized in that: The support plate (31) is provided with a guide groove (311), and the bottom of the lifting plate (33) is provided with a limiting block (331) that can move along the guide groove (311).

7. The ejector mechanism for an automobile engine casting mold according to claim 6, characterized in that: One end of the top rod (32) is provided with a protrusion (322), which is close to the support plate (31) and is cylindrical. The upper surface of the support plate (31) is provided with a limiting groove (313) for restricting the movement of the protrusion (322). When the limiting block (331) slides up and down along the guide groove (311), the lifting plate (33) can slide on the top rod (32), so that the top rod (32) rotates along the limiting groove (313) on a fixed axis.

8. The ejector mechanism for an automobile engine casting mold according to claim 4, characterized in that: The cooling mechanism (4) is configured as a cooling pipe.

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