Aluminum alloy support die-casting device for automobile suspension system

Abstract

The invention relates to the technical field of aluminum alloy support die-casting, and discloses an aluminum alloy support die-casting device for an automobile suspension system, which comprises a first die seat and a second die seat which are arranged on a die-casting machine, the top of the first mold base is provided with an air exhaust column used for vacuumizing the mold cavity in a communicating mode. A lifting column is arranged in the air exhaust column in a sliding mode, a plugging seat is fixed to the bottom end of the lifting column, a sealing ring used for being connected with the plugging seat in a sealed mode is fixed to the inner wall of the air exhaust column, and the air exhaust column is opened and closed through lifting of the plugging seat. According to the technical scheme, the mold cavity is vacuumized before the aluminum alloy support is subjected to die-casting forming, air in the mold cavity can be effectively exhausted, the air is prevented from entering molten aluminum in the molten aluminum pouring process, air holes are prevented from being formed, the air hole defect of a workpiece is remarkably reduced, and the casting performance is improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy bracket die casting technology, specifically to an aluminum alloy bracket die casting device for automotive suspension systems. Background Technology

[0002] Aluminum alloy brackets, as structural support components made of aluminum alloy, are widely used in numerous fields due to their unique material properties and excellent overall performance. Aluminum alloys themselves have significant advantages in terms of low density and high strength, which allows aluminum alloy brackets to effectively reduce overall weight while ensuring sufficient load-bearing capacity, facilitating transportation, installation, and use. They are widely used in the automotive, electronics, and machinery industries.

[0003] Aluminum alloy bracket die casting is a forming process in which molten aluminum alloy is pressed into a mold cavity under high pressure and high speed, and then cooled and solidified to obtain bracket-type parts. In the existing aluminum alloy bracket die casting process, because the mold cavity contains gas, when aluminum alloy brackets are formed by ordinary die casting, air is easily trapped inside the aluminum alloy bracket, forming pores. This increases the porosity of the finished casting, thereby reducing the mechanical properties of the casting and resulting in a decline in quality. Summary of the Invention

[0004] This invention provides a die-casting device for aluminum alloy brackets for automotive suspension systems. By performing a vacuum treatment on the mold cavity before die-casting the aluminum alloy bracket, the air inside the mold cavity can be effectively discharged. This solves the problem mentioned in the background art that air is easily trapped inside the aluminum alloy bracket, forming pores, which increases the porosity of the finished casting, thereby reducing the mechanical properties of the casting and causing a decline in quality.

[0005] The present invention provides the following technical solution: a die-casting device for an aluminum alloy bracket for an automotive suspension system, comprising a first mold seat and a second mold seat mounted on a die-casting machine, wherein both the first mold seat and the second mold seat are provided with a mold cavity, and the top of the first mold seat is connected to an air extraction column for evacuating the mold cavity; The suction column has a sliding lifting column inside, and a sealing seat is fixed at the bottom end of the lifting column. A sealing ring for sealing connection with the sealing seat is fixed on the inner wall of the suction column. The suction column is opened and closed by the lifting and lowering of the sealing seat, and the sealing seat cleans the bottom wall of the suction column by rotating.

[0006] As an optional embodiment of the die-casting device for aluminum alloy brackets in automotive suspension systems described in this invention, the lifting column is elastically provided with a core column inside, and a first sliding groove is provided on the outer surface of the lifting column. A sliding plate is slidably provided in the first sliding groove, and a scraper is provided on the surface of the sliding plate. The scraper scrapes away impurities on the bottom wall of the suction column by extending outward.

[0007] As an optional embodiment of the die-casting device for aluminum alloy brackets in automotive suspension systems described in this invention, a second sliding groove is provided on the core column, a sliding rod is slidably arranged in the second sliding groove, one end of the sliding rod is fixed to the sliding plate, and a first sliding protrusion is fixed to the other end of the sliding rod. An inclined groove for the first sliding protrusion to slide is provided on the inner wall of the second sliding groove.

[0008] As an optional embodiment of the die-casting device for the aluminum alloy bracket of the automotive suspension system described in this invention, a round rod is fixed to the top of the core column, a first spring is fixed between the top of the core column and the inner wall of the lifting column, the first spring is movably sleeved on the round rod, a crossbar is fixed to the top of the round rod, a third sliding groove is provided on the lifting column for the crossbar to slide, and a limiting ring for contacting the crossbar is fixed to the inner wall of the suction column.

[0009] As an optional embodiment of the die-casting device for aluminum alloy brackets in automotive suspension systems according to the present invention, a connecting plate is fixed on the surface of the core column, a fourth sliding groove is provided inside the lifting column for the connecting plate to slide, a slide rail is fixed on the outer surface of the sliding plate, the scraper is slidably disposed on the slide rail, a transmission rod is fixed on the surface of the scraper, and the top end of the transmission rod is slidably connected to the connecting plate.

[0010] As an optional embodiment of the die-casting device for aluminum alloy brackets in automotive suspension systems described in this invention, a limit ball is fixed at the end of the transmission rod, and a limit groove is provided inside the connecting plate for the limit ball to slide.

[0011] As an optional embodiment of the die-casting device for aluminum alloy brackets in automotive suspension systems described in this invention, the lifting column has an air chamber inside, a piston plate is elastically arranged inside the air chamber, an air blowing head communicating with the air chamber is fixed on the outer surface of the scraper, and an abutment rod for lifting the piston plate is elastically connected to the core column.

[0012] As an optional embodiment of the die-casting device for the aluminum alloy bracket of the automobile suspension system described in this invention, the lifting column is provided with a fifth sliding groove for the sliding of the abutment rod, the surface of the abutment rod is fixed with a second sliding protrusion, and the interior of the fifth sliding groove is provided with a trajectory groove for the sliding of the second sliding protrusion.

[0013] As an optional embodiment of the die-casting device for aluminum alloy brackets of automotive suspension systems described in this invention, the track groove includes a rising part, an inclined part, a descending part, and a horizontal part that are connected in a manner, and a limit plate is elastically provided at the connection between the inclined part and the descending part.

[0014] As an optional embodiment of the die-casting device for aluminum alloy brackets in automotive suspension systems described in this invention, a fixing frame is fixed inside the suction column, an electric push rod is fixed on the lower surface of the fixing frame, a mounting plate is fixed to the output end of the electric push rod, a servo motor is fixed to the lower surface of the mounting plate, and the output end of the servo motor is fixed to the lifting column.

[0015] The present invention has the following beneficial effects: 1. The aluminum alloy bracket die-casting device for the automotive suspension system can perform vacuum treatment on the mold cavity before the aluminum alloy bracket is die-cast, which can effectively remove the air inside the mold cavity and prevent gas from entering the aluminum liquid during the pouring process and forming pores, thereby significantly reducing the porosity defects of the workpiece and improving the performance of the casting.

[0016] 2. The aluminum alloy bracket die-casting device used in this automotive suspension system can rotate when the sealing seat moves downward to open the suction column, thus facilitating preliminary rotational cleaning of the bottom wall of the suction column. When the sealing seat moves downward, it drives the scraper to pass through the sealing ring and become flush with the S-section of the suction column. Then, through the outward extension of the scraper, the scraper contacts the inner wall of the S-section of the suction column. Combined with the rotation of the lifting column, the scraper rotates, causing the scraper to rotate and scrape the inner wall of the S-section of the suction column, further efficiently removing impurities attached to the inner wall and significantly improving the impurity cleaning effect.

[0017] 3. The aluminum alloy bracket die-casting device used in this automotive suspension system ensures that the scraper's position remains unchanged as it extends outward. This is achieved by connecting the scraper plate and driving the transmission rod to maintain the same position, allowing the scraper to move only horizontally. As a result, the scraper remains flush with the suction column S-section throughout its outward extension, enabling thorough cleaning of the inner wall of the suction column S-section, effectively reducing cleaning dead zones, and significantly improving the thoroughness of the cleaning.

[0018] 4. The aluminum alloy bracket die-casting device used in this automotive suspension system allows the air chamber to draw in air as the scraper extends outward and the piston plate moves upward. Then, when the scraper contacts the inner wall of the suction column S section, the piston plate moves downward and resets, blowing the gas inside the air chamber out through the air blower. The air blower then blows the gas toward the scraper, thereby blowing away residual impurities on its surface during cleaning, ensuring the cleanliness of the scraper and improving the cleaning effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional view of the model cavity and the suction column of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the air extraction column in this invention.

[0022] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the air extraction column in this invention.

[0023] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle.

[0024] Figure 6 This is a cross-sectional view of the internal structure of the air extraction column in this invention.

[0025] Figure 7 For the present invention Figure 6 Enlarged view of section B in the middle.

[0026] Figure 8 For the present invention Figure 6 Enlarged view of point C in the middle.

[0027] Figure 9 For the present invention Figure 6 Enlarged view of point D in the middle.

[0028] Figure 10 This is a schematic diagram of the trajectory groove portion in this invention.

[0029] Figure 11 This is a cross-sectional view of the limiting plate portion in this invention.

[0030] In the diagram: 1. Die-casting machine; 2. First mold base; 3. Second mold base; 4. Mold cavity; 5. Evacuation column; 6. Lifting column; 7. Sealing seat; 8. Sealing ring; 9. Core column; 10. First slide groove; 11. Slide plate; 12. Scraper; 13. Second slide groove; 14. Slide rod; 15. First sliding protrusion; 16. Inclined groove; 17. Round rod; 18. First spring; 19. Crossbar; 20. Air blowing hole; 21. Third slide groove; 22. Limiting ring; 23. Connecting plate; 24. Fourth slide groove; 25. Slide rail; 26. Transmission rod; 27. Limiting ball; 28. Limiting groove; 29. ​​Air chamber; 30. Piston plate; 31. Air blowing head; 32. Abutting rod; 33. Fifth slide groove; 34. Second sliding protrusion; 35. Track groove; 351. Rising part; 352. Inclining part; 353. Falling part; 354. Horizontal part; 355. Limiting plate; 356. Rotating groove; 357. Rotating rod; 358. Torsion spring; 359. First protrusion; 3510. Second protrusion; 36. Fixing bracket; 37. Electric push rod; 38. Mounting plate; 39. Servo motor; 40. Air inlet; 41. Air outlet; 42. Air guide pipe; 43. Air extraction pipe; 44. Second spring; 45. Third spring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1, please refer to Figures 1-11 A die-casting device for an aluminum alloy bracket for an automotive suspension system includes a first mold seat 2 and a second mold seat 3 mounted on a die-casting machine 1. Both the first mold seat 2 and the second mold seat 3 have a mold cavity 4. The top of the first mold seat 2 is connected to an air extraction column 5 for evacuating the mold cavity 4. A lifting column 6 is slidably installed inside the suction column 5. A sealing seat 7 is fixed at the bottom end of the lifting column 6. A sealing ring 8 is fixed on the inner wall of the suction column 5 for sealing connection with the sealing seat 7. The suction column 5 is opened and closed by the lifting of the sealing seat 7, and the sealing seat 7 cleans the bottom wall of the suction column 5 by rotating. An internal mounting bracket 36 is fixed to the air extraction column 5, and an electric push rod 37 is fixed to the lower surface of the mounting bracket 36.

[0033] In this technical solution, during the die casting of the aluminum alloy bracket, the first mold base 2 and the second mold base 3 are first engaged, so that the mold cavity 4 on the first mold base 2 and the second mold base 3 are engaged to form a sealed space. The first mold base 2 is provided with a liquid injection hole for pouring molten aluminum into the mold cavity 4. Then, molten aluminum is poured into the mold cavity 4 through the liquid injection hole until the mold cavity 4 is filled. After the molten aluminum cools down, the molten aluminum forms an aluminum alloy bracket in the mold cavity 4. Then, the first mold base 2 and the second mold base 3 are separated, and the die-cast aluminum alloy bracket is taken out, thus completing the die casting process of the aluminum alloy bracket. During the die-casting process of the aluminum alloy bracket, if there is air inside the mold cavity 4, the gas will enter the molten aluminum, causing pores to form inside the workpiece, increasing porosity defects and reducing the performance of the casting. Therefore, an extraction pipe 43 is connected to the top of the extraction column 5, and the other end of the extraction pipe 43 is connected to a vacuum pump. Figure 2 and Figure 3 As shown, before pouring molten aluminum into the mold cavity 4, the lifting column 6 is pushed downward by the electric push rod 37. The lifting column 6 drives the sealing seat 7 downward, separating the sealing seat 7 from the sealing ring 8. The sealing seat 7 is then removed from the vacuum column 5, thus connecting the mold cavity 4 with the vacuum column 5. A vacuum pump is used to evacuate the gas inside the mold cavity 4 through the vacuum column 5 and the vacuum pipe 43, thereby maintaining a vacuum state inside the mold cavity 4. Then, the electric push rod 37 is reset, bringing the sealing block into contact with the sealing ring 8, and the vacuum column 5 is closed again, thus performing the die casting process of the aluminum alloy bracket under vacuum. In this technical solution, the die-casting machine 1, the first mold base 2, the second mold base 3, and the vacuum pump are all existing technologies and are not the innovations of this application, so they will not be described in detail.

[0034] In Example 2, after the aluminum alloy bracket is die-cast, some impurities formed by molten aluminum may remain between the bottom of the sealing seat 7 and the bottom wall of the suction column 5. If these impurities are not removed in time, they may affect the ventilation effect when the sealing seat 7 descends and opens the suction column 5. Moreover, when the sealing seat 7 is reset, the impurities will also affect the sealing effect between the sealing seat 7 and the sealing ring 8. To address this issue, this example is an improvement based on Example 1. For details, please refer to Example 1. Figures 1-11 The output end of the electric push rod 37 is fixed with a mounting plate 38, and the lower surface of the mounting plate 38 is fixed with a servo motor 39. The output end of the servo motor 39 is fixed with the lifting column 6. The lifting column 6 has a core column 9 elastically installed inside, and a first sliding groove 10 is opened on the outer surface of the lifting column 6. A sliding plate 11 is slidably installed in the first sliding groove 10. A scraper 12 is provided on the surface of the sliding plate 11. The scraper 12 scrapes away impurities on the bottom wall of the suction column 5 by extending outward. The core post 9 has a second sliding groove 13, and a sliding rod 14 is slidably arranged in the second sliding groove 13. One end of the sliding rod 14 is fixed to the sliding plate 11, and the other end of the sliding rod 14 is fixed to a first sliding protrusion 15. An inclined groove 16 for the first sliding protrusion 15 to slide is provided on the inner wall of the second sliding groove 13. A round rod 17 is fixed to the top of the core column 9. A first spring 18 is fixed between the top of the core column 9 and the inner wall of the lifting column 6. The first spring 18 is movably sleeved on the round rod 17. A crossbar 19 is fixed to the top of the round rod 17. A third sliding groove 21 is provided on the lifting column 6 for the crossbar 19 to slide. A limiting ring 22 for contacting the crossbar 19 is fixed to the inner wall of the suction column 5.

[0035] In this technical solution, when the lifting column 6 moves downward, the servo motor 39 first drives the lifting column 6 to rotate, and the lifting column 6 drives the sealing seat 7 to rotate. As the sealing seat 7 moves downward, it rotates and can initially clean the bottom wall of the suction column 5, making it easier to remove impurities. To enhance the cleaning effect on the bottom wall of the suction column 5, when the lifting column 6 moves downward, it drives the core column 9 downward. When the sealing seat 7 moves out from the bottom end of the suction column 5, the lifting column 6 drives the scraper 12 to pass through the sealing ring 8 and move to the bottom wall of the suction column 5 (i.e., Figure 3 (segment S in the middle), at this time, the lifting column 6 drives the horizontal bar 19 downward to contact the limiting ring 22, and then the lifting column 6 continues to move downward. Due to the contact of the limiting ring 22 with the horizontal bar 19, the horizontal bar 19 cannot continue to move downward, thus fixing the round bar 17 and the core column 9. This causes the lifting column 6 to move downward relative to the core column 9, compressing and storing the first spring 18. Subsequently, the core column 9 returns to its original position, as... Figure 7 As shown, the lifting column 6 moves downward, causing the sliding rod 14 to move downward along the second sliding groove 13. The sliding rod 14 causes the first sliding protrusion 15 to slide along the inclined groove 16, so that the first sliding protrusion 15 causes the sliding rod 14 to move to the left. The sliding rod 14 causes the sliding plate 11 to move to the left along the first sliding groove 10. The sliding plate 11 causes the scraper 12 to move to the left, so that the scraper 12 contacts the S-section of the suction column 5. Then, in conjunction with the rotation of the lifting column 6, the scraper 12 rotates and cleans the inner wall of the S-section of the suction column 5, thereby further removing impurities on the inner wall and achieving a better impurity removal effect. In this technical solution, the upper end face of the sealing seat 7 is provided with an inclined structure, which makes it easy for scraped impurities to slide down along the inclined surface, avoiding the problem of the accumulated material causing the impurities to be difficult to discharge.

[0036] In Example 3, when the scraper 12 moves to section S of the suction column 5, it moves outward while simultaneously moving downward a certain distance along with the lifting column 6. This results in the scraper 12 not completely covering the length of section S, but rather becoming misaligned with it. Consequently, the scraper 12 cannot adequately clean the inner wall of section S of the suction column 5, creating cleaning dead zones. This example addresses this problem by improving upon Example 2. For details, please refer to [link to example 2]. Figures 1-11 A connecting plate 23 is fixed on the surface of the core column 9. A fourth sliding groove 24 for the connecting plate 23 to slide is opened inside the lifting column 6. A slide rail 25 is fixed on the outer surface of the slide plate 11. The scraper 12 is slidably disposed on the slide rail 25. A transmission rod 26 is fixed on the surface of the scraper 12. The top end of the transmission rod 26 is slidably connected to the connecting plate 23. A limiting ball 27 is fixed at the end of the transmission rod 26, and a limiting groove 28 is provided inside the connecting plate 23 for the limiting ball 27 to slide.

[0037] In this technical solution, when the scraper 12 moves to be flush with the S-section of the suction column 5, the scraper 12 moves outward to contact the inner wall of the S-section of the suction column 5. The scraper 12 drives the transmission rod 26 to move, and the transmission rod 26 drives the limiting ball 27 to slide along the limiting groove 28. During this process, since the core column 9 cannot continue to move downward, when the lifting column 6 continues to move downward, the connecting plate 23 slides upward relative to the fourth sliding groove 24. The connecting plate 23 drives the transmission rod 26 to move upward, and the transmission rod 26 drives the scraper 12 to move upward along the slide rail 25, so that the scraper 12 moves upward relative to the first sliding groove 10. Thus, the position of the scraper 12 relative to the core column 9 remains unchanged. Therefore, during the outward extension of the scraper 12, it can be ensured that the scraper 12 always remains flush with the S-section of the suction column 5, so that the scraper 12 can fully clean the inner wall of the S-section of the suction column 5, reduce the cleaning dead angle, and further improve the thoroughness of cleaning. In this technical solution, the limiting ball 27 can only slide left and right along the limiting groove 28 and will not slide out of the limiting groove 28, and the scraper 12 can only slide up and down along the slide rail 25 and will not separate from the slide rail 25, thereby ensuring the stable movement of the structure.

[0038] In Example 4, when the scraper 12 scrapes and cleans the inner wall of section S of the suction column 5, some of the scraped impurities remain on the surface of the scraper 12, making them difficult to remove and resulting in a poor cleaning effect. To address this problem, this example is an improvement based on Example 3. For details, please refer to... Figures 1-11 The lifting column 6 has an air chamber 29 inside, and a piston plate 30 is elastically arranged inside the air chamber 29. An air blowing head 31 communicating with the air chamber 29 is fixed on the outer surface of the scraper 12. An abutment rod 32 for lifting the piston plate 30 is elastically connected to the core column 9. The lifting column 6 has a fifth sliding groove 33 for the sliding of the abutment rod 32. The surface of the abutment rod 32 is fixed with a second sliding protrusion 34. The interior of the fifth sliding groove 33 has a track groove 35 for the sliding of the second sliding protrusion 34. The track groove 35 includes an ascending part 351, an inclined part 352, a descending part 353 and a horizontal part 354 that are connected together, and a limit plate 355 is elastically provided at the connection between the inclined part 352 and the descending part 353.

[0039] In this technical solution, when the core column 9 can no longer move downward, the lifting column 6 moves downward relative to the core column 9. When the scraper 12 extends outward, the contact rod 32 moves upward along the fifth slide groove 33. The contact rod 32 drives the piston plate 30 to move upward, causing the air chamber 29 to draw in air. A second spring 44 is fixed between the piston plate 30 and the top of the air chamber 29. The piston plate 30 moves upward to compress the second spring 44, causing the second spring 44 to store force until the scraper 12 moves to contact the inner wall of the s section of the suction column 5. The air chamber 29 then completes the air intake. When the scraper 12 rotates to clean, the contact rod 32 releases the restriction on the piston plate 30, and the second spring 44 releases its force, allowing the gas inside the air chamber 29 to be discharged through the air blower head 31. The air blower head 31 has an air blowing hole 20 for blowing air to the end of the scraper 12, which facilitates the removal of impurities remaining on the surface of the scraper 12 during cleaning, thereby ensuring the cleanliness of the scraper 12 and improving the cleaning effect. When the abutment rod 32 moves upward, it first causes the second sliding protrusion 34 to slide along the rising portion 351 of the track groove 35, thus enabling the abutment rod 32 to drive the piston plate 30 to move upward. Figure 9 As shown, when the second sliding protrusion 34 slides along the inclined portion 352, the second sliding protrusion 34 drives the abutment rod 32 to move to the right. The movement of the second sliding protrusion 34 to the right drives the abutment rod 32 to move to the right. A third spring 45 is fixed between the abutment rod 32 and the inner wall of the core column 9. The movement of the abutment rod 32 to the right compresses the third spring 45, causing the third spring 45 to store force. When the second sliding protrusion 34 slides to the top of the descending portion 353, the abutment rod 32 moves out from the lower surface of the piston plate 30, thereby releasing the restriction on the piston plate 30. At this time, the second spring 44 resets, causing the piston plate 30 to move downward and expel the gas inside the air chamber 29. Then, during the reset, the second sliding protrusion 34 slides downward along the descending portion 353 until it slides to the horizontal portion 354. At this time, the third spring 45 stores force, causing the second sliding protrusion 34 to slide to the left along the horizontal portion 354, while causing the abutment rod 32 to move to the left and reset. like Figure 10 and Figure 11As shown, the lifting column 6 has a rotating groove 356 inside, and a rotating rod 357 is rotatably mounted inside the rotating groove 356. A limiting plate 355 is fixedly sleeved on the circumference of the rotating rod 357. A torsion spring 358 is movably sleeved on the circumference of the rotating rod 357. One end of the torsion spring 358 is fixed to the inner wall of the rotating groove 356, and the other end of the torsion spring 358 is fixed to the surface of the limiting plate 355. A first protrusion 359 is fixed to the inner wall of the rotating groove 356, and the surface of the limiting plate 355... A second protrusion 3510 is fixed to the surface; when the second sliding protrusion 34 slides from the inclined portion 352 to the descending portion 353, the second sliding protrusion 34 abuts against the limiting plate 355, causing the limiting plate 355 to rotate clockwise, and at the same time, the torsion spring 358 stores force. When the second sliding protrusion 34 slides to the top of the descending portion 353, the second sliding protrusion 34 separates from the limiting plate 355, the limiting plate 355 loses its abutment, the torsion spring 358 releases force, and the limiting plate 355 returns to its original position. Figure 10 In this state, when the second sliding protrusion 34 moves downward, the limiting plate 355 cannot be pressed due to the abutment of the first protrusion 359 against the second protrusion 3510. Figure 10 The state rotates counterclockwise, causing the limiting plate 355 to block the second sliding protrusion 34, so that the second sliding protrusion 34 can only slide down along the descending part 353 and will not slide into the inclined part 352 again, thereby realizing the cyclic movement of the second sliding protrusion 34 along the track groove 35.

[0040] In this technical solution, the bottom of the air chamber 29 is provided with an air inlet 40 and an air outlet 41. An air guide pipe 42 is provided between the air outlet 41 and the air blowing head 31. A first one-way valve is provided in the air inlet 40 and a second one-way valve is provided in the air outlet 41. The first one-way valve allows air to enter only from the air inlet 40 and not to exit from the air inlet 40. The second one-way valve allows air to exit only from the air outlet 41 and not to enter from the air outlet 41.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A die-casting device for an aluminum alloy bracket for an automotive suspension system, comprising a first mold base (2) and a second mold base (3) mounted on a die-casting machine (1), characterized in that: Both the first mold base (2) and the second mold base (3) have a mold cavity (4). The top of the first mold base (2) is connected to a vacuum column (5) for evacuating the mold cavity (4). A lifting column (6) is slidably arranged inside the vacuum column (5). A sealing seat (7) is fixed at the bottom end of the lifting column (6). A sealing ring (8) is fixed on the inner wall of the vacuum column (5) for sealing connection with the sealing seat (7). The vacuum column (5) is opened and closed by the lifting of the sealing seat (7), and the sealing seat (7) cleans the bottom wall of the vacuum column (5) by rotating.

2. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 1, characterized in that: The lifting column (6) has a core column (9) elastically arranged inside. The outer surface of the lifting column (6) is provided with a first sliding groove (10). A sliding plate (11) is slidably arranged in the first sliding groove (10). A scraper (12) is provided on the surface of the sliding plate (11). The scraper (12) scrapes away impurities on the bottom wall of the suction column (5) by extending outward.

3. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 2, characterized in that: The core column (9) is provided with a second sliding groove (13), and a sliding rod (14) is slidably arranged in the second sliding groove (13). One end of the sliding rod (14) is fixed to the sliding plate (11), and the other end of the sliding rod (14) is fixed with a first sliding protrusion (15). An inclined groove (16) is provided on the inner wall of the second sliding groove (13) for the first sliding protrusion (15) to slide.

4. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 3, characterized in that: A round rod (17) is fixed to the top of the core column (9). A first spring (18) is fixed between the top of the core column (9) and the inner wall of the lifting column (6). The first spring (18) is movably sleeved on the round rod (17). A crossbar (19) is fixed to the top of the round rod (17). A third sliding groove (21) is provided on the lifting column (6) for the crossbar (19) to slide. A limiting ring (22) for contacting the crossbar (19) is fixed to the inner wall of the suction column (5).

5. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 4, characterized in that: The core column (9) has a connecting plate (23) fixed on its surface. The lifting column (6) has a fourth sliding groove (24) for the connecting plate (23) to slide inside. The outer surface of the sliding plate (11) has a slide rail (25) fixed on it. The scraper (12) is slidably mounted on the slide rail (25). The surface of the scraper (12) has a transmission rod (26) fixed on it. The top end of the transmission rod (26) is slidably connected to the connecting plate (23).

6. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 5, characterized in that: The end of the transmission rod (26) is fixed with a limiting ball (27), and the inside of the connecting plate (23) is provided with a limiting groove (28) for the limiting ball (27) to slide.

7. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 6, characterized in that: The lifting column (6) has an air chamber (29) inside, and a piston plate (30) is elastically arranged inside the air chamber (29). The outer surface of the scraper (12) is fixed with an air blowing head (31) that communicates with the air chamber (29). The core column (9) is elastically connected with an abutment rod (32) for lifting the piston plate (30).

8. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 7, characterized in that: The lifting column (6) has a fifth sliding groove (33) for sliding the abutment rod (32). The surface of the abutment rod (32) is fixed with a second sliding protrusion (34). The interior of the fifth sliding groove (33) has a track groove (35) for sliding the second sliding protrusion (34).

9. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 8, characterized in that: The track groove (35) includes an ascending part (351), an inclined part (352), a descending part (353) and a horizontal part (354) connected in series, and a limit plate (355) is elastically provided at the connection between the inclined part (352) and the descending part (353).

10. The die-casting device for aluminum alloy brackets in automotive suspension systems according to claim 9, characterized in that: The suction column (5) is fixed with a fixing frame (36) inside. An electric push rod (37) is fixed on the lower surface of the fixing frame (36). An installation plate (38) is fixed on the output end of the electric push rod (37). A servo motor (39) is fixed on the lower surface of the installation plate (38). The output end of the servo motor (39) is fixed to the lifting column (6).

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