Aluminum alloy part die casting device for automobile production

Abstract

This invention relates to the field of pressure casting technology, specifically to a die-casting device for aluminum alloy parts in automobile production. It includes a worktable and a guide column fixedly connected to the top of the worktable; a top plate is fixedly connected to the top of the guide column; a movable plate is slidably mounted on the guide column; the movable plate is fixedly connected to the top plate via a hydraulic cylinder; a lower mold is fixedly connected to the upper surface of the worktable; lower mold cavities are evenly distributed on the upper surface of the lower mold; a frame surrounding the lower mold cavities protrudes from the upper surface of the lower mold; an upper mold is located directly above the lower mold. This invention, by directly pouring molten aluminum alloy into the lower mold cavity inside the frame, and coordinating with the downward extrusion of the upper mold, allows the gas in the cavity to be quickly discharged and filled with molten aluminum alloy. Compared to existing die-casting methods using injection channels, this invention can handle the die-casting of multiple independent cavities that are scattered and fragmented, ensuring smooth die-casting while improving the quality of the die-cast products.

Description

Technical Field

[0001] This invention relates to the field of pressure casting technology, specifically to a die-casting apparatus for aluminum alloy parts used in automobile production. Background Technology

[0002] Pressure casting is a method of producing castings by rapidly filling molten metal into a metal mold cavity and solidifying it under pressure. It is the fastest of all casting methods. It can produce metal parts with complex shapes, clear contours, thin walls, and deep cavities. Currently, pressure casting is widely used in industrial production and has become an important, even essential, production method for many components in the automotive, motorcycle, aerospace, electrical instrumentation, communication equipment, medical machinery, and daily necessities industries.

[0003] Die-casting equipment includes a fixed mold with a fixed cavity and a moving mold with a moving cavity. After the fixed mold and moving mold are closed, the fixed mold cavity and moving mold cavity combine to form a mold cavity, which is connected to the injection channel. The aluminum alloy solution is injected into the mold cavity along the injection channel. For die-casting of some scattered parts, the injection channel needs to be connected to all the scattered multiple mold cavities. This means that the path of the injection channel is relatively long. As a result, the time taken for the aluminum alloy solution to fill multiple scattered independent mold cavities is relatively long. The long time will cause the aluminum alloy solution in the injection channel to begin to cool and solidify, affecting the fluidity of the aluminum alloy solution and thus affecting the injection of the aluminum alloy solution. This is especially noticeable in some small parts of the injection channel, and may even make it difficult to fill the mold cavity with aluminum alloy solution. However, if the aluminum alloy solution is poured into the fixed mold cavity of the fixed mold, the excess aluminum alloy solution will flow out and spill from the fixed mold cavity. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a die-casting device for aluminum alloy parts in automobile production. This invention directly pours molten aluminum alloy into the lower mold cavity inside the frame, and with the upper mold moving downward to squeeze, the gas in the cavity can be quickly discharged and filled with molten aluminum alloy. Compared with the existing die-casting method that uses injection channels, this invention can be used for die-casting of multiple independent cavities that are scattered and fragmented, ensuring smooth die-casting while improving the quality of die-cast products.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: An aluminum alloy parts die-casting device for automobile production, as described in the present invention, includes a worktable and a guide column fixedly connected to the top of the worktable; a top plate is fixedly connected to the top of the guide column; a movable plate is slidably sleeved on the guide column; the movable plate is fixedly connected to the top plate via a hydraulic cylinder; a lower mold is fixedly connected to the upper surface of the worktable; lower mold cavities are uniformly arranged on the upper surface of the lower mold; a frame surrounding the lower mold cavities protrudes from the upper surface of the lower mold; an upper mold is located directly above the lower mold; upper mold cavities corresponding to the lower mold cavities are uniformly arranged on the lower surface of the upper mold; the upper mold cavities and lower mold cavities merge to form a mold cavity; the outer surface of the lower mold is movably sealed to the inner side of the frame; a stepped hole is provided through the upper side of the upper mold cavity; a pressure block is slidably sealed within the stepped hole; a pressure rod is fixedly connected to the upper surface of the pressure block; the pressure rod passes through the stepped hole and is fixedly connected to the lower surface of the movable plate; an overflow groove is provided through the stepped hole.

[0006] Preferably, a pressure-boosting spring is sleeved on the outside of the pressure bar; the pressure-boosting spring is fixedly connected between the lower surface of the movable plate and the upper surface of the upper mold.

[0007] Preferably, a baffle frame is fixedly connected to the outer wall of the upper mold; a storage groove is recessed on the upper surface of the baffle frame; the front and rear storage grooves are independently disconnected.

[0008] Preferably, the upper surface of the lower mold is provided with a surrounding groove corresponding to the surrounding frame; the surrounding groove is slidably and sealed to the surrounding frame; the bottom of the surrounding groove is connected to the outside through a vent hole; the lower end of the surrounding frame is connected to the bottom of the surrounding groove by a lower spring; the upper surface of the lower mold is provided with a lower mesh groove; a lower mesh strip is slidably and sealed to the lower mesh groove; the bottom of the lower mesh groove is connected to the surrounding groove through a lifting groove; a lifting strip is rotatably connected to the lifting groove.

[0009] Preferably, the rotation point of the rocker bar is located away from the surrounding groove.

[0010] Preferably, the lower surface of the upper mold is provided with a mesh groove; a mesh strip is slidably and sealed within the mesh groove; the specifications and position of the mesh groove correspond to the specifications and position of the lower mesh groove; the upper end of the mesh strip is fixedly connected to the upper inner wall of the mesh groove by an upper spring.

[0011] Preferably, the lower surface of the retaining frame is provided with a sealing groove corresponding to the upper end of the surrounding frame; the cross-section of the sealing groove is adapted to the surrounding frame.

[0012] Preferably, the vertical height of the overflow trough decreases as it moves away from the middle section; the thickness of the pressure block increases as the vertical height of the overflow trough decreases.

[0013] Preferably, the upper spring, lower spring, and pressure spring are all made of high-temperature resistant materials.

[0014] The beneficial effects of this invention are as follows: 1. This invention directly pours molten aluminum alloy into the lower mold cavity inside the frame, and then extrudes it by moving the upper mold downwards. This allows the gas in the cavity to be quickly discharged and filled with molten aluminum alloy. Compared with the existing die casting method that uses injection channels, this invention can be used for die casting of multiple independent cavities that are scattered and fragmented, ensuring smooth die casting while improving the quality of die-cast products.

[0015] 2. In this invention, the lower mesh strip moves upward and presses against the lower surface of the upper mold, thereby breaking the aluminum alloy solution between the upper and lower molds, avoiding the connection of the formed aluminum alloy semi-finished products, making the formed semi-finished products loose and easy to transport. It can also unload the semi-finished products in the independent cavities in sequence during the unloading process, avoiding the problem of difficulty in unloading the whole.

[0016] 3. In this invention, the upper wire mesh is squeezed and moves upward, overcoming the upper spring. After the upper wire mesh moves upward, it creates space for the lower wire mesh to move upward. After the lower wire mesh moves upward, it completely separates the semi-finished products in the two adjacent cavities. The upper wire mesh also separates each cavity, so that each cavity is independently compressed during the die casting process. This improves the die casting quality of the semi-finished products and avoids the situation where uneven pressure distribution during the die casting process affects the die casting effect. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 A stereoscopic image from another perspective; Figure 4 yes Figure 3 Enlarged view of point B in the middle; Figure 5 This is a perspective view of the upper and lower molds in this invention; Figure 6 This is a perspective view of the network strip in this invention; Figure 7 This is a perspective view of the lower mesh strip in this invention; Figure 8 This is a cross-sectional view of the present invention; Figure 9 yes Figure 8 Enlarged view of point C in the middle; Figure 10 This is a cross-sectional view of the overflow channel in this invention.

[0019] In the diagram: Workbench 1, Guide Post 11, Top Plate 12, Movable Plate 13, Hydraulic Cylinder 14, Lower Mold 2, Lower Mold Cavity 21, Surrounding Groove 22, Vent Hole 23, Lower Spring 24, Lower Mesh Groove 25, Lower Mesh Strip 26, Warping Groove 27, Warping Strip 28, Surrounding Frame 3, Upper Mold 4, Upper Mold Cavity 41, Step Hole 42, Pressure Block 43, Pressure Rod 44, Overflow Groove 45, Pressure Spring 46, Mesh Groove 47, Mesh Strip 48, Upper Spring 49, Baffle Frame 5, Storage Groove 51, Sealing Groove 52. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 10 As shown, the present invention includes the following embodiments: Example 1: A die-casting device for aluminum alloy parts in automobile production, comprising a worktable 1 and a guide column 11 fixedly connected to the top of the worktable 1; a top plate 12 is fixedly connected to the top of the guide column 11; a movable plate 13 is slidably sleeved on the guide column 11; the movable plate 13 is fixedly connected to the top plate 12 via a hydraulic cylinder 14; a lower mold 2 is fixedly connected to the upper surface of the worktable 1; lower mold cavities 21 are evenly arranged on the upper surface of the lower mold 2; a frame 3 protruding from the upper surface of the lower mold 2 surrounds the lower mold cavities 21; and a frame 3 is provided directly above the lower mold 2. An upper mold 4 is provided; the lower surface of the upper mold 4 is uniformly provided with upper mold cavities 41 corresponding to the lower mold cavity 21; the upper mold cavity 41 and the lower mold cavity 21 are combined to form a cavity; the outer surface of the lower mold 2 is movably sealed to the inner side of the frame 3; a stepped hole 42 is provided through the upper side of the upper mold cavity 41 facing upward; a pressure block 43 is slidably sealed and connected in the stepped hole 42; a pressure rod 44 is fixedly connected to the upper surface of the pressure block 43; the pressure rod 44 passes through the stepped hole 42 and is fixedly connected to the lower surface of the movable plate 13; an overflow groove 45 is provided through the stepped hole 42 from front to back.

[0022] Aluminum ingots, along with other metals and auxiliary materials, are melted in a furnace to form an aluminum alloy solution. Initially, the hydraulic cylinder 14 is shortened, causing the movable plate 13 to move upward. During this upward movement, the movable plate 13 slides upward along the guide post 11, causing the fixedly connected pressure rod 44 to move upward. The diameter of the lower half of the stepped hole 42 is larger than that of the upper half. The pressure block 43 is slidably sealed to the lower half of the stepped hole 42, while the pressure rod 44 passes through the upper half of the stepped hole 42. An exhaust gap is left between the outer wall of the pressure rod 44 and the inner wall of the upper half of the stepped hole 42. As the movable plate 13 moves the pressure rod 44 and the pressure block 43 upward, the pressure block 43 slides along the inner side of the lower half of the stepped hole 42, eventually becoming stuck in the lower half of the stepped hole 42. At the location where the upper part connects, the pressure block 43 will cross the overflow groove 45, exposing the overflow groove 45. As the pressure block 43 continues to move upward, it will cause the upper mold 4 to move upward. During the upward movement of the upper mold 4, it will detach from the contact with the lower mold 2. After the upper mold 4 continues to move upward, it will move out from the inside of the frame 3, exposing both the lower mold cavity 21 and the upper mold cavity 41. Then, a release agent is sprayed. The release agent is applied to the lower surface of the upper mold 4, the upper mold cavity 41, the overflow groove 45, the stepped hole 42, the upper surface of the lower mold 2, the inside of the frame 3, and the lower mold cavity 21. The spraying of the release agent facilitates subsequent demolding. Then, the molten aluminum alloy solution is poured into multiple upper mold cavities 41. The liquid level of the aluminum alloy solution inside the frame 3 is higher than the upper surface of the lower mold 2. Excess aluminum alloy solution is absorbed by the inside of the frame 3. The interception and enclosure prevent the aluminum alloy solution from flowing out. Then, the hydraulic cylinder 14 extends, causing the movable plate 13 to slide downwards along the guide post 11. During the downward movement of the movable plate 13, the pressure bar 44 and pressure block 43 move downwards simultaneously. During the downward movement of the pressure block 43, the upper mold 4 moves downwards. After moving downwards, the upper mold 4 enters the inner side of the enclosure 3. The lower surface of the upper mold 4 squeezes the aluminum alloy solution on the upper surface of the lower mold 2 within the enclosure 3. The aluminum alloy solution on the upper surface of the lower mold 2, located inside the enclosure 3, is squeezed and enters the upper mold cavity 41. The gas between the lower and upper surfaces of the upper mold 4 enters the upper mold cavity 41 and eventually flows away along the stepped hole 42 and the overflow groove 45. The lower surface of the upper mold 4 eventually contacts the upper surface of the lower mold 2. The overflow groove 45... The outflow of molten aluminum alloy indicates that there is sufficient molten aluminum alloy in the cavity. The movable plate 13 then continues to move downwards. During this downward movement, the pressure rod 44 and the pressure block 43 move downwards as well. The pressure block 43 slides along the stepped hole 42, compressing the molten aluminum alloy within the stepped hole 42. This creates pressure on the molten aluminum alloy in the cavity. Since the weight of the upper mold 4 is much greater than the pressure on the molten aluminum alloy in the cavity, the upper mold 4 will not move upwards and detach from the lower mold 2. The molten aluminum alloy in the cavity becomes more compact under pressure. Cooling channels (not shown in the figure) are provided inside the upper mold 4 and the lower mold 2. The flowing coolant in the cooling channels carries away heat, thus cooling and solidifying the molten aluminum alloy in the cavity.After the aluminum alloy solution has solidified, it forms a semi-finished product. Then, the movable plate 13 is moved upwards. During this upward movement, the pressure bar 44 and pressure block 43 move upwards, and the pressure block 43 moves upwards, causing the upper mold 4 to move upwards. The upper mold 4 eventually moves out of the frame 3 and detaches from the lower mold 2. Because a release agent is sprayed into the stepped hole 42 and the upper mold cavity 41, the semi-finished product detaches from the upper mold cavity 41 and is placed in the lower mold cavity 21. The semi-finished product is then removed from the lower mold cavity 21. Finally, the aluminum alloy slag in the overflow tank 45 is removed. The semi-finished product after die casting undergoes machining to shape the die-cast aluminum alloy parts into the approximate shape of the product. Finally, burrs and flash are removed, electroplating is performed, and assembly is carried out. This invention directly pours molten aluminum alloy into the lower mold cavity 21 inside the frame 3, and with the upper mold 4 moving downward to squeeze, the gas in the cavity can be quickly discharged and filled with molten aluminum alloy. Compared with the existing die casting method that uses injection channels, this invention can be used for die casting of some scattered and independent cavities, ensuring smooth die casting while improving the quality of die-cast products.

[0023] Example 2: A pressure spring 46 is sleeved on the outside of the pressure bar 44; the pressure spring 46 is fixedly connected between the lower surface of the movable plate 13 and the upper surface of the upper mold 4.

[0024] After the upper mold 4 and the lower mold 2 are closed, the movable plate 13 is driven to continue moving downward. During the downward movement of the movable plate 13, the pressure bar 44 and the pressure block 43 will also move downward. During the downward movement of the pressure block 43, the residual aluminum alloy solution in the stepped hole 42 will be squeezed, thereby transferring the pressure to the aluminum alloy solution in the cavity. During the downward movement of the movable plate 13, the pressure spring 46 will also be squeezed. The pressure spring 46 will transfer the elastic force to the upper mold 4, thereby increasing the force of the upper mold 4 pressing against the upper surface of the lower mold 2, thus making the die casting more stable after the upper mold 4 and the lower mold 2 are closed. During the demolding process, after the upper mold 4 is separated from the lower mold 2, the upper mold 4 will move away from the movable plate 13 under the push of the pressure spring 46 and the action of its own gravity.

[0025] Example 3: The upper mold 4 is fixedly connected to the outer wall of the baffle frame 5; the upper surface of the baffle frame 5 is provided with a recessed storage groove 51; the front and rear storage grooves 51 are independently disconnected.

[0026] Excess aluminum alloy solution flowing out of overflow tank 45 will flow into storage tank 51 and be collected. Baffle 5 can block excess aluminum alloy solution. The aluminum alloy solution flowing out of overflow tank 45 will flow into two independent and disconnected storage tanks 51 to prevent the aluminum alloy solution in the two storage tanks 51 from solidifying and clumping together, affecting the removal. This reduces the difficulty of removing the solidified aluminum alloy in overflow tank 45. Release agent can be sprayed into overflow tank 45 in advance.

[0027] Example 4: The upper surface of the lower mold 2 is provided with a groove 22 corresponding to the frame 3; the groove 22 is slidably and sealed to the frame 3; the bottom of the groove 22 is connected to the outside through a vent 23; the lower end of the frame 3 is connected to the bottom of the groove 22 by a lower spring 24; the upper surface of the lower mold 2 is provided with a lower mesh groove 25; a lower mesh strip 26 is slidably and sealed to the lower mesh groove 25; the bottom of the lower mesh groove 25 is connected to the groove 22 through a rocker groove 27; a rocker bar 28 is rotatably connected to the rocker groove 27.

[0028] In this embodiment, the rotation point of the rocker bar 28 is located away from the surrounding groove 22.

[0029] The specifications of the lower wire mesh strip 26 are the same as those of the lower wire mesh groove 25. Initially, the upper end of the lower wire mesh strip 26 is flush with the upper end of the lower wire mesh groove 25. As the upper mold 4 enters the inner side of the frame 3, the upper mold 4 will cause the baffle 5 to contact the upper end of the frame 3. The frame 3 will be squeezed downwards by the baffle 5. During the downward movement of the frame 3, the gas in the groove 22 will be discharged along the vent hole 23. The downward movement of the frame 3 will also squeeze the end of the rocker bar 28 located in the groove 22, causing the rocker bar 28 to flip within the rocker groove 27, moving the end of the rocker bar 28 away from the groove 22 upwards. The end of the rocker bar 28 away from the groove 22 will push the lower wire mesh strip 26 upwards. After the lower wire mesh strip 26 moves upwards, it presses against the upper... The lower surface of mold 4 disconnects the molten aluminum alloy between the upper mold 4 and the lower mold 2, preventing the semi-finished aluminum alloy products from connecting after molding. This makes the semi-finished products loose and easy to transport. It also allows for the sequential unloading of semi-finished products in independent cavities during the unloading process, avoiding the problem of difficulty in unloading the whole. After the upper mold 4 moves away from the lower mold 2, the baffle 5 disengages from the frame 3. The frame 3 moves upward under the push of the lower spring 24, releasing the pressure on the rocker bar 28. The lower mesh bar 26 will move down and reset into the lower mesh groove 25. Setting the rotation point of the rocker bar 28 away from the groove 22 makes it easier for the frame 3 to rock the lower mesh bar 26 upward using the rocker bar 28, achieving the purpose of saving effort and energy.

[0030] Example 5: The lower surface of the upper mold 4 is provided with a mesh groove 47; a mesh strip 48 is slidably and sealed inside the mesh groove 47; the specifications and position of the mesh groove 47 correspond to the specifications and position of the lower mesh groove 25; the upper end of the mesh strip 48 is fixedly connected to the upper inner wall of the mesh groove 47 by an upper spring 49.

[0031] As the upper mold 4 enters the inner side of the frame 3, the lower end of the mesh strip 48 is flush with the lower surface of the upper mold 4, so the molten aluminum alloy inside the frame 3 will not enter the mesh tray 47. As the frame 3 is pushed down by the baffle 5, the baffle 5 will push one end of the rocker bar 28, causing the rocker bar 28 to rotate. Under the rocker bar 28, the lower mesh strip 26 moves up along the lower mesh tray 25. The upper end of the lower mesh strip 26 will enter the mesh tray 47 and push the mesh strip 48 in the mesh tray 47. The mesh strip 48 moves up under the pressure and overcomes the upper spring 49. After the mesh strip 48 moves up, it makes room for the lower mesh strip 26 to move up. After the lower wire mesh strip 26 moves upward, it completely separates the semi-finished products in the two adjacent cavities. The upper wire mesh strip 26 also separates each cavity, so that each cavity is independently pressurized during the die casting process, which improves the die casting quality of the semi-finished products and avoids the situation where uneven pressure distribution during the die casting process affects the die casting effect. After the upper mold 4 moves out from the inside of the frame 3, the upper wire mesh strip 48 will move downward along the wire mesh groove 47 under the push of the upper spring 49. The lower end of the upper wire mesh strip 48 will be flush with the lower surface of the upper mold 4 again, and the upper end of the lower wire mesh strip 26 will retract back into the lower wire mesh groove 25. The upper end of the lower wire mesh strip 26 will return to the state of being flush with the upper surface of the lower mold 2.

[0032] Example 6: The lower surface of the baffle 5 is provided with a sealing groove 52 corresponding to the upper end of the frame 3; the cross-section of the sealing groove 52 is adapted to the frame 3.

[0033] During the process of the upper mold 4 entering the inner side of the frame 3, the upper mold 4 will drive the baffle 5 to move downward. During the downward movement, the baffle 5 will contact the upper end of the frame 3. Since the lower surface of the baffle 5 is provided with a sealing groove 52 corresponding to the upper end of the frame 3, the upper end of the baffle 5 will enter the sealing groove 52, increasing the sealing surface between the frame 3 and the upper mold 4, and improving the sealing effect of the frame 3 on the inner aluminum alloy solution. During the upward movement of the upper mold 4, the baffle 5 will move away from the frame 3, and the upper end of the frame 3 will move out of the sealing groove 52 on the lower surface of the baffle 5.

[0034] Example 7: The vertical height of the overflow trough 45 is set to decrease as it moves away from the middle section; the thickness of the pressure block 43 increases as the vertical height of the overflow trough 45 decreases.

[0035] The height of the middle section of the overflow groove 45 is higher than the height of the front and rear ends of the overflow groove 45. Therefore, the aluminum alloy solution flowing out from the stepped hole 42 can flow smoothly out along the overflow groove 45, reducing the amount of aluminum alloy solution remaining in the overflow groove 45. In addition, the thickness of the pressure block 43 increases as the height of the overflow groove 45 decreases, so that the position where the stepped hole 42 connects to the overflow groove 45 can be blocked as the pressure block 43 moves down. This allows the aluminum alloy solution in multiple cavities to be die-cast simultaneously, improving the consistency of die casting.

[0036] Example 8: The upper spring 49, lower spring 24, and pressure-boosting spring 46 are all made of high-temperature resistant materials. Because the upper spring 49, lower spring 24, and pressure-boosting spring 46 are all made of high-temperature resistant materials, they can withstand the temperature transferred from the aluminum alloy molten metal to the upper mold 4 and lower mold 2. Insulating materials can also be applied to the surfaces of the upper spring 49, lower spring 24, and pressure-boosting spring 46 to ensure their smooth operation. The upper spring 49 can be detachably connected to the mesh strip 48 and mesh groove 47; the detachment method is existing technology and will not be elaborated further. The lower spring 24 is detachably connected to the surrounding groove 22 and surrounding frame 3; the detachment method is existing technology and will not be elaborated further. The pressure-boosting spring 46 is detachably connected to the movable plate 13 and upper mold 4; the detachment method is existing technology and will not be elaborated further. The upper spring 49, lower spring 24, and pressure-boosting spring 46 can be selectively replaced according to usage.

[0037] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A die-casting apparatus for aluminum alloy parts in automobile production, comprising a worktable and a guide column fixedly connected to the top of the worktable; a top plate fixedly connected to the top of the guide column; a movable plate slidably mounted on the guide column; the movable plate being fixedly connected to the top plate via a hydraulic cylinder; characterized in that: The lower mold is fixedly connected to the upper surface of the worktable; the upper surface of the lower mold has uniformly arranged lower mold cavities; the upper surface of the lower mold has a protruding frame that surrounds the lower mold cavities; an upper mold is located directly above the lower mold; the lower surface of the upper mold has uniformly arranged upper mold cavities corresponding to the lower mold cavities; the upper mold cavities and the lower mold cavities merge to form a mold cavity; the outer surface of the lower mold is movably sealed to the inner side of the frame; a stepped hole is provided through the inner side of the upper mold cavity facing upward; a pressure block is slidably sealed to the stepped hole; a pressure rod is fixedly connected to the upper surface of the pressure block; the pressure rod passes through the stepped hole and is fixedly connected to the lower surface of the movable plate; an overflow groove is provided through the stepped hole from front to back.

2. The die-casting apparatus for aluminum alloy parts in automobile production according to claim 1, characterized in that: A pressure-boosting spring is sleeved on the outside of the pressure bar; the pressure-boosting spring is fixedly connected between the lower surface of the movable plate and the upper surface of the upper mold.

3. The die-casting apparatus for aluminum alloy parts in automobile production according to claim 1, characterized in that: The upper mold outer wall is fixedly connected to a baffle frame; the upper surface of the baffle frame is recessed and provided with a storage groove; the front and rear storage grooves are independently disconnected.

4. The die-casting apparatus for aluminum alloy parts in automobile production according to claim 3, characterized in that: The upper surface of the lower mold is provided with a groove corresponding to the surrounding frame; the groove is slidably and sealed to the surrounding frame; the bottom of the groove is connected to the outside through a vent hole; the lower end of the surrounding frame is connected to the bottom of the groove by a lower spring; the upper surface of the lower mold is provided with a lower mesh groove; a lower mesh strip is slidably and sealed to the lower mesh groove; the bottom of the lower mesh groove is connected to the surrounding groove through a rocker groove; a rocker bar is rotatably connected to the rocker groove.

5. The die-casting apparatus for aluminum alloy parts in automobile production according to claim 4, characterized in that: The rotation point of the rocker arm is set away from the surrounding groove.

6. The die-casting apparatus for aluminum alloy parts in automobile production according to claim 4, characterized in that: The upper mold has a mesh groove on its lower surface; a mesh strip is slidably and sealed inside the mesh groove; the specifications and position of the mesh groove correspond to the specifications and position of the lower mesh groove; the upper end of the mesh strip is fixedly connected to the upper inner wall of the mesh groove by an upper spring.

7. The die-casting apparatus for aluminum alloy parts in automobile production according to claim 3, characterized in that: The lower surface of the retaining frame is provided with a sealing groove corresponding to the upper end of the frame; the cross-section of the sealing groove is adapted to the frame.

8. The die-casting apparatus for aluminum alloy parts in automobile production according to claim 1, characterized in that: The vertical height of the overflow trough decreases as it moves away from the middle section; the thickness of the pressure block increases as the vertical height of the overflow trough decreases.

9. A die-casting apparatus for aluminum alloy parts in automobile production according to claim 6, characterized in that: The upper spring, lower spring, and pressure-boosting spring are all made of high-temperature resistant materials.

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