Ejecting mechanism for automobile engine casting mold

Abstract

The invention provides a material ejecting mechanism for an automobile engine casting mold, and belongs to the technical field of metal casting, the material ejecting mechanism for the automobile engine casting mold comprises a rack and a table top located above the rack, a mold pressing mechanism is arranged on the upper surface of the table top, and when the mold pressing mechanism is closed, a mold cavity for pouring can be formed; a supporting plate capable of sliding up and down is arranged on the rack, an ejector rod is mounted on the supporting plate, a through hole is formed in the table top, a guide hole communicated with the through hole is formed in the mold pressing mechanism, and the ejector rod penetrates through the table top and the mold pressing mechanism through the guide hole and the through hole to reach the interior of the mold cavity and is used for demolding a casting; the ejector rod is driven by the supporting plate to move up and down, cold air is fed into the cavity through the circulation channel, the bottom of the casting and the ejector rod are cooled, and the situation that the bottom of the casting deforms when the ejector rod ejects the casting and the ejector rod deforms due to frequent heating is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of metal casting, and in particular relates to a material ejecting mechanism for a casting mould of an automobile engine. Background Art

[0002] The ejector mechanism of the automobile engine casting mold is one of the core components in casting production. Its function runs through the entire process of casting molding, demolding and subsequent processing, directly affecting the casting quality, production efficiency and mold life.

[0003] A Chinese patent with authorization announcement number CN118287661B discloses a refractory metal casting mold and a casting molding method, including a casting table, a top of which is provided with a plurality of mounting holes, a casting lower mold being fixedly connected in the mounting holes, a casting upper mold being provided above the casting lower mold, and a lifting unit being installed on the casting table that cooperates with the plurality of casting upper molds; a first rotating shaft is provided above the casting table, and a driver is installed on the casting table that cooperates with the first rotating shaft; the staff does not need to keep a close eye on whether the ejector rod ejects the casting, and the casting can be moved directly to the unloading station, thereby ensuring unloading efficiency and eliminating the need for the staff to maintain a high level of concentration, thereby reducing the staff's work intensity.

[0004] However, the above technical solution still has the following problems. When the required cast metal is ejected from the mold, due to the different levels of structural design complexity of the mold and the casting, the metal has not yet completely cooled during ejection, which can easily cause the ejector pin of the ejection mechanism to be frequently heated and deformed, or the contact surface of the casting may be deformed or even penetrated. In addition, the casting is easily adhered to the ejector pin when being ejected, resulting in some metal remaining on the top of the ejector pin when it is removed, resulting in an increase in defective products and a shortened service life of the ejector pin. Summary of the Invention

[0005] The purpose of the present invention is to provide a ejection mechanism for an automobile engine casting mold, aiming to solve the problems in the prior art in which the ejector rod is frequently heated and deformed when the casting is ejected through the ejection mechanism, and the contact surface of the casting is deformed or even penetrated by the ejection.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a material ejecting mechanism for an automobile engine casting mold, comprising: a frame and a table located above the frame, a die pressing mechanism being provided on the upper surface of the table, and a mold cavity for pouring being formed when the die pressing mechanism is closed, a support plate which can slide up and down is provided on the frame, a ejector rod is mounted on the support plate, a through hole is provided on the table, a guide hole connected to the through hole is provided on the die pressing mechanism, the ejector rod passes through the table and the die pressing mechanism to the interior of the mold cavity through the guide hole and the through hole, and is used to demold the casting, a circulation channel is formed between the guide hole and the through hole and the ejector rod, and a neck is provided at the top of the guide hole, a conical block which cooperates with the neck and can seal the circulation channel is provided at the top of the ejector rod, the cavity in the cooling mechanism is connected to the circulation channel, and when the conical block is separated from the neck, the circulation channel is opened, so that the cold air inside the cooling mechanism can enter the interior of the mold cavity.

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

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

[0009] A further technical solution of the present invention is that a slider is provided under the side mold, and the slider passes through a long groove to the bottom of the table top. A first inclined block and a second inclined block are provided at the bottom of the slider from top to bottom. 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 close to the table top. When the support plate moves downward away from the table top, 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 an air inlet is provided on the cooling mechanism, the air inlet is connected to the cavity, and air holes are provided on the upper and lower bottom surfaces of the cooling mechanism. The air holes on the lower bottom surface have the same diameter as the push rod, ensuring sealing when the push rod slides. There is a gap between the air holes on the upper bottom surface and the push rod, and the air holes on the upper bottom surface are connected to the circulation channel.

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

[0012] A further technical solution of the present invention is that a guide groove is provided on the support plate, and a limit 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 a protrusion is provided at one end of the push rod, the protrusion is close to the support plate and is cylindrical, and a limiting groove is provided on the upper surface of the support plate for limiting the movement of the protrusion. When the limiting block slides up and down along the guide groove, the lifting plate can slide on the push rod, causing the push rod to rotate 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: 1. The support plate drives the ejector pin to move up and down, and sends cold air into the cavity through the circulation channel to cool the bottom of the casting and the ejector pin, ensuring that the bottom of the casting is completely cooled and solidified, preventing the bottom of the casting from being deformed when the ejector pin is ejected, and preventing the ejector pin from being deformed due to frequent heating. At the same time, the air pressure inside and outside the mold cavity is balanced to facilitate demolding.

[0016] 2. The lifting plate is used to rotate the ejector pin before it moves up and down, so that the ejector pin and the bottom surface of the casting are separated from each other. This prevents the ejector pin from sticking together when it is directly removed, which requires frequent cleaning of the ejector pin. At the same time, it ensures that the casting has a higher molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2 It is an overall transverse axonometric cross-sectional view of a specific embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure at center A; Figure 4 It is a structural schematic diagram of a specific embodiment of the present invention; Figure 5 It is a structural schematic diagram of the side mold in a specific embodiment of the present invention; Figure 6 It is a transverse axonometric cross-sectional view of a specific embodiment of the present invention; Figure 7 This is a schematic structural diagram of a material ejection mechanism according to a specific embodiment of the present invention; Figure 8A schematic structural diagram of a support plate and a push rod in a specific embodiment of the present invention; Figure 9 This is a structural diagram of a lifting plate in a specific embodiment of the present invention; Figure 10 for Figure 6 A magnified schematic diagram of the structure at point B.

[0018] In the figure: 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. die pressing mechanism; 21. bottom die; 211. guide hole; 22. top die; 23. side die; 231. slider; 2311. first oblique block; 2312. second oblique block; 232. square cavity; 3. ejecting 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 DESCRIPTION

[0019] 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.

[0020] See also Figures 1-9 , the present invention provides the following technical solutions: a material ejection mechanism for a casting mold of an automobile engine, comprising a frame 1, a die pressing mechanism 2, a material ejection mechanism 3 and a cooling mechanism 4; The frame 1 is placed horizontally on the ground, with the die mechanism 2 mounted on it. When casting an engine, the die mechanism 2 is first closed and sealed. After closing, liquid metal is introduced into the die mechanism 2 to form the engine structure. Once the metal has solidified, the die mechanism 2 is opened, at which point the metal surface is completely solidified. The ejector mechanism 3 is mounted on the frame 1 and positioned below the die mechanism 2. When the die mechanism 2 is opened, it lifts the already cast engine part placed on the die mechanism 2 upward, completely freeing it from the die mechanism 2.

[0021] The cooling mechanism 4 is installed on the frame 1 and is located between the die mechanism 2 and the ejection mechanism 3. When the ejection mechanism 3 lifts the engine casting, the lower surface of the engine casting and the ejection mechanism 3 are ventilated and cooled through the cooling mechanism 4 to prevent the lower surface of the engine casting from being deformed due to the incomplete cooling and hardening of the casting when the engine casting is lifted upward. At the same time, it prevents the temperature at the contact position between the ejection mechanism 3 and the casting from being too high and being affected by large pressure, resulting in deformation.

[0022] See also Figure 2 、 Figure 4 、 Figure 5 and Figure 6 A table 11 is provided on the frame 1, and the die pressing mechanism 2 includes a bottom die 21 installed on the upper surface of the table 11, and a top die 22 is provided above the bottom die 21. The top die 22 and the bottom die 21 are parallel to each other, and a side die 23 is provided between the top die 22 and the bottom die 21. The side die 23 is perpendicular to the bottom die 21. In this embodiment, four side die 23 are provided. When the top die 22 and the side die 23 move toward the bottom die 21, they can dock with each other and completely close to form a mold cavity for casting an engine. A liquid injection port is provided on the top die 22 for injecting liquid metal into the mold.

[0023] A first hydraulic cylinder 111 is installed above the table 11, which is adapted to the number of side molds 23. 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 side molds 23 are driven to move closer to or away from each other by the first hydraulic cylinder 111. When they are close to each other, they can form a complete mold cavity. A plurality of long grooves 112 are provided on the table 11 along the moving direction of the side mold 23. The long grooves 112 pass through the table 11 up and down. Two sliders 231 are provided at the bottom of the side mold 23, which pass through the long grooves 112 and are slidably connected along the length direction thereof. The two sliders 231 are symmetrically arranged on both sides of the bottom of the side mold 23 to ensure that the sliders 231 can move back and forth along the length direction of the long grooves 112. When the sliders 231 are close to the bottom mold 21, they are combined into a closed cavity, and when they are 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 second hydraulic cylinder 12 drives the top mold 22 away from or close to the bottom mold 21 to achieve mold closing or mold opening.

[0024] See also Figure 2 、 Figure 6 and Figure 7The ejection mechanism 3 includes a support plate 31, an ejector rod 32, and a lifting plate 33. The support plate 31 is arranged 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 axis. After the engine casting is cast, it is lifted by the ejector rod 32. There are multiple groups of ejector rods 32 evenly arranged to ensure that the engine casting is subjected to uniform upward thrust. A lifting plate 33 is installed above the support plate 31. The ejector rod 32 passes through the lifting plate 33 and slides along the length direction of the ejector rod 32. The ejector rod 32 slides on the ejector rod 32 through the lifting plate 33, driving the ejector rod 32 to rotate.

[0025] See Figure 7-10 The support plate 31 is provided with a guide groove 311, and a limit block 331 which can move 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 the output end of the fourth hydraulic cylinder 312 is connected to the limit block 331. The limit block 331 is driven by the fourth hydraulic cylinder 312 to move up and down along the guide groove 311. A plurality of through holes 332 are provided on the lifting plate 33, and the through holes 332 match the diameter of the push rod 32. The push rod 32 is The through hole 332 passes through the lifting plate 33, so that the lifting plate 33 can slide freely up and down along the main body of the push rod 32. The outer wall of the push rod 32 is provided with a spiral groove 321, which is spirally arranged along the length direction of the push rod 32. The inner wall of the through hole 332 is provided with a sliding post 3321 that slides freely along the spiral groove 321. This design ensures that when the lifting plate 33 slides on the push rod 32, the sliding post 3321 moves up and down along the spiral groove 321, driving the push rod 32 to rotate on a fixed axis.

[0026] One end of the ejector pin 32, near the support plate 31, is provided with a cylindrical protrusion 322, slightly larger in diameter than the ejector pin 32. A retaining groove 313 is provided on the upper surface of the support plate 31. The retaining groove 313 cooperates with the ejector pin 32 and the protrusion 322 to limit their position, so that the ejector pin 32 can only rotate along a fixed axis along the retaining groove 313. When the lifting plate 33 slides over the ejector pin 32, causing it to rotate, the top of the ejector pin 32 begins to rotate, breaking its contact with the bottom surface of the engine casting. This generates shear force between the top of the ejector pin 32 and the metal bottom, destroying their adhesion. This increases the contact area between the top of the ejector pin 32 and the air, accelerating heat dissipation and reducing the temperature of the contact area, thus preventing further adhesion during ejection.

[0027] See Figure 2 and Figure 3The cooling mechanism 4 is arranged at the bottom of the table 11, and a cavity 41 is provided inside it. An air inlet 42 is provided on the side. Cold air enters the cavity 41 through the air inlet 42. The air inlet 42 is communicated with the cavity 41 inside the cooling mechanism 4. Air holes 43 are provided on the upper and lower sides of the cooling mechanism 4. The number of air holes 43 is adapted to the ejector rod 32, and the air holes 43 on the lower bottom surface have the same diameter as the main body of the ejector rod 32 and just coincide with each other. The air holes 43 on the lower bottom surface are sealed by the ejector rod 32 to prevent gas leakage due to poor sealing when the ejector rod 32 slides on the air holes 43 on the lower bottom surface. In this embodiment, the cooling mechanism 4 is arranged as a cooling pipe.

[0028] The bottom mold 21 is provided with guide holes 211, which are the same number as the ejector pins 32 and are coaxially arranged with them. The table 11 is provided with multiple through-holes 113, which have the same diameter as the lower sections of the guide holes 211, overlap in position, and interpenetrate each other. The upper bottom surface air holes 43 have the same diameter as the through-holes 113 and exactly overlap, meaning that the upper bottom surface air holes 43 are larger than the lower bottom surface air holes 43. A gap exists between the guide holes 211, through-holes 113, and the upper bottom surface air holes 43 and the ejector pins 32, forming an annular flow channel.

[0029] The ejector pin 32 passes through the cavity 41, the table 11, and the bottom mold 21 through the air hole 43, the through hole 113, and the guide hole 211 to the interior of the mold cavity, and is flush with the inner bottom wall of the mold cavity. A conical block 323 is provided on the top of the ejector pin 32. The upper surface of the conical block 323 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. A conical block 323 is provided on the top of the guide hole 211 for use with the conical block 323. When the conical block 323 is located at the conical block, 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 conical block, the circulation channel is opened, and the gas from the cooling mechanism 4 can enter the mold cavity through this circulation channel.

[0030] After the lifting plate 33 slides along the push rod 32 to rotate the push rod 32 to a certain angle, the third hydraulic cylinder 13 drives the support plate 31 and the push rod 32 to move downward. When the conical block 323 moves downward and disengages from the necking, the guide hole 211 is connected to 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 circulation channel, accelerating the cooling of the bottom surface of the casting and the push rod 32, and preventing the bottom surface of the casting from being deformed by the lifted position when the casting is lifted upward, or the push rod 32 from being deformed due to excessive temperature and excessive force. Then the push rod 32 is driven to move upward. When the conical block 323 is fully extended upward from the through hole 113, the casting has been pushed up for a distance. Cold air is continued to be introduced between the bottom surface of the casting and the cavity of the bottom mold 21 to accelerate the cooling of the bottom surface of the casting. At the same time, it prevents the deep cavity or cross hole structure on the bottom mold 21 from forming negative pressure when the casting moves upward, causing the part to stick to the mold core, making it difficult to demold or requiring a larger push force to demold.

[0031] See also Figure 4-Figure 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. After the mold is closed, it is located above the support plate 31 and contacts its upper surface. There is a distance between the first inclined block 2311 and the second inclined block 2312, so that the support plate 31 can be stuck between the first inclined block 2311 and the second inclined block 2312. When the side mold 23 is closed toward the bottom mold 21, the slider 231 moves toward 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 limit the upward movement of the support plate 31, preventing the ejection mechanism 3 from starting to move upward before the mold is opened, which may cause damage to the casting. 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 in a direction away from the support plate 31 .

[0032] The side mold 23 is provided with a square cavity 232 near the first hydraulic cylinder 111. The output end of the first hydraulic cylinder 111 is provided with a square block 1111 that slides along the square cavity 232. The square block 1111 reciprocates within the square cavity 232 along the direction of movement of the side mold 23. Before the push rod 32 rotates and moves downward, the first hydraulic cylinder 111 drives the square block 1111 to move a distance along the inside of the square cavity 232 away from the support plate 31 before stopping, clearing some distance for the initial demolding of the side mold 23. The third hydraulic cylinder 13 then drives the support plate 31 downward. At this point, the support plate 31 contacts the upper inclined surface of the second inclined block 2312 and presses the slider 231 away from the support plate 31, completing the demolding of the side of the casting and preventing deformation of the casting due to asynchronous movement of the side mold 23 during demolding. After the support plate 31 moves downward for a distance, the first hydraulic cylinder 111 begins to drive the side mold 23 away from the casting, ensuring normal demolding of the subsequent casting.

Claims

1. A material ejection mechanism for an automobile engine casting mold, comprising: A machine frame (1) and a table (11) located above the machine frame (1), characterized in that a die pressing mechanism (2) is provided on the upper surface of the table (11), and when the die pressing mechanism (2) is closed, a mold cavity for casting can be formed, a support plate (31) capable of sliding up and down is provided on the machine frame (1), a push rod (32) is installed on the support plate (31), a through hole (113) is provided on the table (11), a guide hole (211) connected to the through hole (113) is provided on the die pressing mechanism (2), and the push rod (32) passes through the guide hole (211) and the through hole ( 113) penetrates the table (11) and the die pressing mechanism (2) to the interior of the mold cavity and is used to demold the casting. A circulation 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 necking. The top of the ejector rod (32) is provided with a conical block (323) that cooperates with the necking and can seal the circulation channel. The cavity (41) in the cooling mechanism (4) is connected to the circulation channel. When the conical block (323) is separated from the necking, the circulation channel is opened, allowing the cold air inside the cooling mechanism (4) to enter the interior of the mold cavity.

2. The ejector mechanism for an automobile engine casting mold according to claim 1, characterized in that: The push rod (32) is rotatably arranged on the support plate (31), a spiral groove (321) is provided on the push 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 push 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), and a fourth hydraulic cylinder (312) capable of driving the lifting plate (33) to slide on the push rod (32) is provided on the support plate (31), and when the lifting plate (33) moves up and down relative to the push rod (32), the push rod (32) is driven to rotate.

3. The ejector mechanism for an automobile engine casting mold according to claim 1, characterized in that: The die pressing mechanism (2) comprises a plurality of side molds (23) perpendicular to the table (11), a top mold (22) is arranged above the side molds (23), a bottom mold (21) is arranged below the side molds (23), the bottom mold (21) is fixed on the table (11), a first hydraulic cylinder (111) is arranged on the table (11) for driving the side molds (23) to move closer to or away from each other, and a second hydraulic cylinder (12) is arranged on the top of the frame (1) for driving the top mold (22) to move closer to or away from the bottom mold (21). When the top mold (22), the side molds (23) and the bottom mold (21) move closer to each other, an injection molding chamber can be formed.

4. The ejector mechanism for an automobile engine casting mold according to claim 3, characterized in that: A slider (231) is provided below the side mold (23), and the slider (231) passes through the long slot (112) to the bottom of the table (11). A first inclined block (2311) and a second inclined block (2312) are provided at the bottom of the slider (231) from top to bottom. 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) for driving the support plate (31) away from or close to 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).

5. 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 hole (42), which is communicated with the cavity (41). The cooling mechanism (4) is provided with air holes (43) on the upper and lower bottom surfaces. The air holes (43) on the lower bottom surface have the same diameter as the ejector rod (32), ensuring sealing when the ejector rod (32) slides. A gap exists between the air holes (43) on the upper bottom surface and the ejector rod (32), and the air holes (43) on the upper bottom surface are communicated with the circulation channel.

6. The ejector mechanism for an automobile engine casting mold according to claim 4, characterized in that: The side mold (23) is provided with a square cavity (232), and the first hydraulic cylinder (111) is provided with a square block (1111) that slides along the square cavity (232).

7. The ejector mechanism for an automobile engine casting mold according to claim 2, characterized in that: A guide groove (311) is provided on the support plate (31), and a limit block (331) capable of moving along the guide groove (311) is provided at the bottom of the lifting plate (33).

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

9. The ejector mechanism for an automobile engine casting mold according to claim 5, characterized in that: The cooling mechanism (4) is configured as a cooling pipe.

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