Automatic die-casting equipment for automobile aluminum alloy accessories

Abstract

The invention relates to the technical field of die-casting equipment, in particular to automatic die-casting equipment for automobile aluminum alloy accessories. Comprising a bottom frame; the mounting frame is connected to the top of the bottom frame; the female die is connected to the mounting frame; the male die is connected to the mounting frame in a sliding manner; the hydraulic cylinder is mounted on the side face of the mounting frame, and a telescopic rod of the hydraulic cylinder is connected with the male die; the feeding pipe is connected to the side face of the female die and keeps communicating with the female die. The liquid spraying pipe is respectively connected to the female die and the male die and is communicated with the female die and the male die; and the liquid storage tank is connected to the interior of the bottom frame. Through cooperation of the preheating assembly and the heat exchange plate in the die, accurate control over the temperature of the die can be achieved, specifically, a first infusion pump pumps high-temperature oil liquid preheated through a heating pipe in a liquid storage tank into a female die and a male die through a first flow dividing pipe, the high-temperature oil liquid is fully preheated, and the temperature of the die is controlled; and the problems of molten metal fluidity reduction, insufficient filling and the like caused by overlarge die temperature difference in the initial stage of die casting can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the technical field of die-casting equipment, and more particularly to an automatic die-casting equipment for automotive aluminum alloy parts. Background Technology

[0002] In modern automotive manufacturing, lightweighting has become a key development direction for improving fuel efficiency, reducing emissions, and enhancing vehicle performance. Aluminum alloys, due to their low density, high specific strength, and good corrosion resistance, are widely used in the production of automotive parts, such as engine blocks, transmission housings, and suspension system components. Die casting, as a highly efficient and precise metal forming process, has become one of the core technologies for the large-scale production of automotive aluminum alloy parts. However, in the actual die casting process, precise control of the mold temperature has a decisive impact on the quality of the final product.

[0003] Currently used die-casting equipment for automotive aluminum alloy parts still has significant shortcomings in mold temperature management. Before die-casting begins, if the mold is not sufficiently preheated, a drastic temperature difference occurs when the cold mold comes into contact with the high-temperature molten aluminum alloy. This causes the surface of the molten metal to cool and solidify rapidly, drastically reducing its fluidity and making it difficult to completely fill the cavity. This easily leads to surface and internal defects such as incomplete filling, cold shuts, and flow marks, severely affecting the appearance quality and structural integrity of the casting. After die-casting, if the mold cooling rate is too slow, the aluminum alloy will experience coarse grain growth during solidification, reducing the material's density and mechanical properties, such as failing to meet tensile strength and hardness standards. Simultaneously, the slow cooling process causes the feeding channels to close prematurely, resulting in insufficient feeding. This leads to macroscopic shrinkage cavities or microscopic shrinkage porosity in thicker parts of the casting, severely affecting the airtightness and load-bearing capacity of the parts, increasing the difficulty of subsequent processing and the product scrap rate. Summary of the Invention

[0004] In view of this, the present invention provides an automatic die-casting equipment for automotive aluminum alloy parts, which can overcome the shortcomings of existing die-casting equipment that do not preheat the mold before die-casting begins and have a slow mold cooling rate after die-casting, which affects the appearance quality and performance of the castings.

[0005] The technical solution is as follows: An automatic die-casting equipment for automotive aluminum alloy parts includes: a base frame; a mounting bracket connected to the top of the base frame; a die cavity connected to the mounting bracket; a punch slidably connected to the mounting bracket; a hydraulic cylinder mounted on the side of the mounting bracket, with the telescopic rod of the hydraulic cylinder connected to the punch; a feed pipe connected to the side of the die cavity and maintaining communication; a liquid spraying pipe connected to both the die cavity and the punch and maintaining communication; a liquid storage tank connected to the inside of the base frame; a heating pipe installed inside the liquid storage tank; an overflow pipe connected to the side of the liquid storage tank and maintaining communication, with the end of the overflow pipe extending out of the side of the base frame; and a preheating assembly disposed inside the base frame for preheating the die cavity and the punch.

[0006] Optionally, the preheating assembly includes: a first liquid pump, installed inside the base frame, with its inlet connected to and maintaining communication with a storage tank; a first diverter pipe, connected to and maintaining communication with the outlet of the first liquid pump, with its ends connected to and maintaining communication with the sides of the die and punch respectively; a second liquid pump, installed inside the base frame, with its outlet connected to and maintaining communication with the storage tank; and a second diverter pipe, connected to and maintaining communication with the inlet of the second liquid pump, with its ends connected to and maintaining communication with the sides of the die and punch respectively.

[0007] Optionally, it also includes: a hollow tube, which is symmetrically slidably connected to the inside of the die and the punch respectively; a push block, which is connected to one end of the hollow tube and keeps in communication, and the push block is circumferentially spaced with air holes; a moving mechanism, which is respectively disposed on the die and the punch, for driving the hollow tube to move; and an air supply mechanism, which is disposed on the bottom frame, for supplying air to the hollow tube.

[0008] Optionally, the moving mechanism includes: a mounting plate, respectively connected to the sides of the die and the punch; a lead screw, symmetrically rotatably connected to the mounting plate; a connecting plate, connected to the hollow tube, and the connecting plate is threadedly connected to the lead screw; a drive motor, mounted on the side of the mounting plate, and the output shaft of the drive motor is connected to the end of one of the lead screws; and a pulley assembly, through which the two lead screws are driven.

[0009] Optionally, the air supply mechanism includes: an air pump, installed on the top of the base frame; and a third branch pipe, connected to the air outlet of the air pump and kept in communication, with one end of the third branch pipe connected to the other end of the hollow tube and kept in communication.

[0010] Optionally, it also includes: a three-way valve, installed on the third diverter pipe; a connecting pipe, connected to the three-way valve and kept in contact; and a control valve, installed on the connecting pipe.

[0011] Optionally, the assembly also includes a bonding component, comprising: a sliding seat symmetrically and slidably connected to the side of the punch; a sliding rod symmetrically and slidably connected to the inside of the punch, and the sliding rod is slidably connected to the sliding seat; a connecting spring, with its two ends connected to the sliding seat and the sliding rod respectively; a baffle plate connected to the end of the sliding rod, and the side of the die having a groove with a shape matching the baffle plate; a rotating locking rod rotatably connected to the sliding seat; a torsion spring, with its two ends connected to the rotating locking rod and the sliding seat respectively; an electromagnet mounted on the sliding seat; an iron sheet connected to the rotating shaft of the rotating locking rod, and the electromagnet attracts the iron sheet by magnetic force; an electric push rod mounted on the die; and a push plate connected to the telescopic rod of the electric push rod, and the push plate is in contact with the rotating locking rod.

[0012] Optionally, it may also include: a swing frame, rotatably connected to the inside of the hollow tube; and a striking block, connected to the swing frame, and the striking block making contact with the inner wall of the hollow tube.

[0013] The beneficial effects of this invention are as follows: 1. This invention achieves precise control of mold temperature through the coordinated operation of the preheating component and the heat exchange plate inside the mold. Specifically, the first pump pumps the high-temperature oil preheated by the heating pipe in the storage tank into the cavity and punch through the first diversion pipe, so that it is fully preheated. This can effectively avoid problems such as reduced fluidity of molten metal and insufficient filling caused by excessive temperature difference in the mold during the initial stage of die casting. After die casting is completed, the second pump pump pumps the high-temperature oil in the mold back to the storage tank through the second diversion pipe. At the same time, the spray pipe injects low-temperature oil for rapid cooling, which significantly improves the solidification quality of the casting, reduces defects such as shrinkage cavities and cold shuts, and ensures the appearance integrity and mechanical properties of the product.

[0014] 2. This invention utilizes the linkage design of hollow tube, push block and air supply mechanism to achieve efficient and uniform demolding of castings. During demolding, the drive motor in the moving mechanism drives the connecting plate through the lead screw and pulley assembly to move the hollow tube and push block towards each other, so that the push block slightly squeezes the casting and exposes the air hole. Then the air pump injects air into the hollow tube through the third diversion pipe. The airflow acts evenly on the gap between the casting and the mold through the air hole. Combined with the vibration of the push block, it can effectively avoid the casting damage or sticking problem caused by traditional demolding methods, and improve demolding efficiency and yield.

[0015] 3. This invention ensures the sealing of the cavity during mold closing by tightly fitting the components and the baffle. Before mold closing, the electromagnet is energized to attract the iron sheet, causing the rotating clamping rod to extend outward. After mold closing, the electromagnet is de-energized, and the torsion spring drives the rotating clamping rod to engage the cavity. Subsequently, the electric push rod pushes the push plate, causing the sliding seat and slide rod to move to the right, so that the baffle is embedded in the groove of the cavity and, under the continuous pressure of the connecting spring, it is tightly attached to the outside of the cavity, effectively preventing molten metal from overflowing. This design not only improves the stability of mold closing but also ensures the forming accuracy of the casting edge, reducing the difficulty of subsequent processing and the scrap rate. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the installation of the feed pipe and spray pipe of the present invention.

[0018] Figure 3 This is a schematic diagram of the installation of the preheating component of the present invention.

[0019] Figure 4 This is a schematic diagram showing the installation of the hollow tube, pusher block, and moving mechanism of the present invention.

[0020] Figure 5This is a schematic diagram of the specific structure of the gas supply mechanism, three-way valve, connecting pipe and control valve of the present invention.

[0021] Figure 6 This is a schematic diagram of the installation of the bonding component of the present invention.

[0022] Figure 7 This is a schematic diagram of the specific structure of the electromagnet and iron sheet of the present invention.

[0023] Figure 8 This is a schematic diagram of the installation of the swing frame and striking block of the present invention.

[0024] The markings in the attached diagram are: 1-base frame, 2-mounting bracket, 3-die, 4-punch, 5-hydraulic cylinder, 6-feed pipe, 7-spray pipe, 8-storage tank, 9-heating pipe, 10-overflow pipe, 11-first pump, 12-first distributor pipe, 13-second pump, 14-second distributor pipe, 15-hollow tube, 16-push block, 1601-vent, 17-mounting plate, 18-lead screw, 19-connecting plate 20-Drive motor, 21-Pulley assembly, 22-Air pump, 23-Third diverter pipe, 24-Three-way valve, 25-Connecting pipe, 26-Control valve, 27-Sliding seat, 28-Slide rod, 29-Connecting spring, 30-Baffle, 31-Groove, 32-Rotating lever, 33-Torsion spring, 34-Electromagnet, 35-Iron sheet, 36-Electric push rod, 37-Push plate, 38-Swing frame, 39-Striking block. Detailed Implementation

[0025] 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.

[0026] Example: An automatic die-casting equipment for automotive aluminum alloy parts, such as... Figures 1-3As shown, the assembly includes a base frame 1, a mounting bracket 2, a die 3, a punch 4, a hydraulic cylinder 5, a feed pipe 6, a spray pipe 7, a storage tank 8, a heating pipe 9, an overflow pipe 10, and a preheating component. The mounting bracket 2 is connected to the top of the base frame 1. The die 3 is connected to the right side of the mounting bracket 2, and the punch 4 is slidably connected to the left side of the mounting bracket 2. The punch 4 is horizontally aligned with the die 3. Heat exchange plates are installed inside both the die 3 and the punch 4. The hydraulic cylinder 5 is installed on the left side of the mounting bracket 2. The telescopic rod of 5 is connected to the punch 4. The rear middle of the die 3 is connected to the feed pipe 6 and kept in communication. The upper inside of both the die 3 and the punch 4 is connected to the spray pipe 7. The left inside of the bottom frame 1 is connected to the liquid storage tank 8. The liquid storage tank 8 is equipped with a heating pipe 9. The upper left side of the liquid storage tank 8 is connected to the overflow pipe 10 and kept in communication. The left end of the overflow pipe 10 extends out of the left side of the bottom frame 1. The bottom frame 1 is equipped with a preheating component for preheating the die 3 and the punch 4.

[0027] like Figure 3 As shown, the preheating assembly includes a first liquid pump 11, a first diversion pipe 12, a second liquid pump 13, and a second diversion pipe 14. The first liquid pump 11 is installed on the front middle side inside the bottom frame 1, and the inlet of the first liquid pump 11 is connected to and maintains communication with the storage tank 8. The outlet of the first liquid pump 11 is connected to and maintains communication with the first diversion pipe 12. The first diversion pipe 12 is a three-way pipe, and the other two ends of the first diversion pipe 12 are respectively connected to and maintain communication with the front upper part of the concave mold 3 and the convex mold 4. The second liquid pump 13 is installed on the rear middle side inside the bottom frame 1, and the outlet of the second liquid pump 13 is connected to and maintains communication with the storage tank 8. The inlet of the second liquid pump 13 is connected to and maintains communication with the second diversion pipe 14. The second diversion pipe 14 is also a three-way pipe, and the other two ends of the second diversion pipe 14 are respectively connected to and maintain communication with the front lower part of the concave mold 3 and the convex mold 4.

[0028] Initially, the storage tank 8 contains a suitable amount of oil, and the rear end of the spray pipe 7 is connected to the oil. When the equipment is needed, the heating pipe 9 is first started to heat the oil in the storage tank 8. Then, the release agent is sprayed onto the concave mold 3 and the convex mold 4. After the oil in the storage tank 8 is heated to the specified temperature, the first pump 11 is controlled to extract the oil from the storage tank 8 and deliver it to the concave mold 3 and convex mold 4 through the first diversion pipe 12. The interiors of die 3 and punch 4 are filled with high-temperature oil. Heat exchange plates inside die 3 and punch 4 preheat them respectively. Then, hydraulic cylinder 5 drives punch 4 to move to the right, causing it to fit against die 3 for mold closing. Molten metal is then supplied through feed pipe 6 between punch 4 and die 3, and the second pump 13 draws oil from inside die 3 and punch 4 through the second diversion pipe 14. The oil is returned to the storage tank 8. Simultaneously, the spray pipe 7 sprays the low-temperature oil into the interior of the die 3 and the punch 4. The oil inside the die 3 and the punch 4 is then transported to the storage tank 8 by the second pump 13, allowing the low-temperature oil to flow within the die 3 and the punch 4. Through the heat exchange plates inside the die 3 and the punch 4, the die 3 and the punch 4 are rapidly cooled, allowing the molten metal between the die 3 and the punch 4 to form quickly. After the casting is formed, it is driven by the hydraulic cylinder 5. The moving punch 4 moves to the left to reset, so that the punch 4 separates from the die 3. Then, the castings adhering to the punch 4 or die 3 are removed, and the release agent is sprayed onto the die 3 and the punch 4 respectively. The above operation is repeated to perform die casting again. As the usage time increases, the oil in the storage tank 8 will gradually increase. When the liquid level in the storage tank 8 is higher than the overflow pipe 10, the excess oil in the storage tank 8 will be discharged out through the overflow pipe 10 for unified collection and recycling.

[0029] like Figure 4 and Figure 5As shown, it also includes hollow tubes 15, push blocks 16, a moving mechanism, and an air supply mechanism. Hollow tubes 15 are symmetrically slidably connected to the upper and lower sides of the cavity 3 and the punch 4. There are eight hollow tubes 15, and two hollow tubes 15 are grouped together. Push blocks 16 are connected to the opposite ends of the hollow tubes 15 on the left and right sides and keep them connected. Each push block 16 has circumferentially spaced air holes 1601. The sides of the push blocks 16 on the left and right sides are flush with the sides of the cavity 3 and the punch 4, respectively. The cavity 3 and the punch 4 are provided with a moving mechanism for driving the hollow tubes 15 to move. The bottom frame 1 is provided with an air supply mechanism for supplying air into the hollow tubes 15. The moving mechanism includes a mounting plate 17, a lead screw 18, a connecting plate 19, a drive motor 20, and a pulley assembly 21. The mounting plate 17 is connected to the middle of the opposite side of the cavity 3 and the punch 4. Each of the two mounting plates 17 is symmetrically connected to a lead screw 18. A connecting plate 19 is connected between the two hollow tubes 15 in the same group. The connecting plate 19 corresponds to the lead screw 18 one by one, and the connecting plate 19 is threadedly connected to its corresponding lead screw 18. A drive motor 20 is installed on the upper part of the opposite side of each of the two mounting plates 17, and the output shaft of the drive motor 20 is connected to the end of the lead screw 18 on the upper side. The pulley assembly 21 consists of two pulleys and a flat belt. Each lead screw 18 is connected to a pulley, and a flat belt is wound between the two corresponding pulleys. The air supply mechanism includes an air pump 22 and a third diversion pipe 23. An air pump 22 is installed on the top left side of the bottom frame 1. The air outlet of the air pump 22 is connected to the third diversion pipe 23 and kept in communication. The opposite ends of the hollow tubes 15 on the left and right sides are connected to the end of the third diversion pipe 23 and kept in communication.

[0030] When demolding of the casting is required, the upper lead screw 18 is first driven to rotate by the drive motor 20. Through the transmission action of the pulley assembly 21, the lower lead screw 18 is driven to rotate. The lead screw 18 drives the connecting plates 19 on the left and right sides to move to opposite sides. The connecting plates 19 drive the hollow tubes 15 and push blocks 16 on the left and right sides to move to opposite sides. The push blocks 16 will cause slight compression to the casting adhering to the punch 4 or the die 3, so that the pores 1601 are exposed in the die 3 and the die 4 respectively. On the side of the punch 4, the air pump 22 controls the air pump to inject air into the hollow tube 15 through the third diversion pipe 23. The air in the hollow tube 15 can enter the gap between the casting and the mold through the air hole 1601. The air pressure can be used to demold the casting evenly. After demolding, the screw 18 is driven to reverse through the cooperation of the drive motor 20 and the pulley assembly 21. The screw 18 drives the connecting plates 19 on the left and right sides, the hollow tube 15 and the push block 16 to move to the opposite side to reset.

[0031] like Figure 5As shown, it also includes a three-way valve 24, a connecting pipe 25, and a control valve 26. The left side of the third diversion pipe 23 is connected to the three-way valve 24, and the connecting pipe 25 is connected to the three-way valve 24 and kept in contact. The connecting pipe 25 is used to connect the mold release agent, and the control valve 26 is installed on the connecting pipe 25. During the demolding process, the control valve 26 can be opened manually so that the mold release agent can enter the third diversion pipe 23 through the connecting pipe 25. The mold release agent in the third diversion pipe 23 can move with the airflow to the air hole 1601 and be evenly sprayed on the surface of the punch 4 and the die 3 through the air hole 1601 to prepare for the next die casting. After the mold release agent is sprayed, the control valve 26 is closed.

[0032] like Figure 6 and Figure 7 As shown, it also includes a bonding assembly, which includes a sliding seat 27, a sliding rod 28, a connecting spring 29, a baffle 30, a rotating locking rod 32, a torsion spring 33, an electromagnet 34, an iron sheet 35, an electric push rod 36, and a push plate 37. Multiple sliding seats 27 are symmetrically and slidably connected to the left side of the punch 4. Multiple sliding rods 28 are slidably connected to the upper and lower sides of the inside of the punch 4. Each sliding rod 28 corresponds to and is slidably connected to a sliding seat 27. A connecting spring 29 connects the sliding seat 27 and the sliding rod 28. A baffle 30 connects the right ends of the multiple sliding rods 28. The die 3... On the left side, there is a groove 31 whose shape matches the baffle 30. Each sliding seat 27 is rotatably connected to a rotating rod 32, which is L-shaped. A torsion spring 33 connects the rotating rod 32 and the sliding seat 27. An electromagnet 34 is installed on the left side of each sliding seat 27. An iron plate 35 is connected to the rotating shaft of each rotating rod 32. The electromagnet 34 can attract the iron plate 35 by magnetic force. An electric push rod 36 is installed on the upper part of the die 3. A push plate 37 is connected to the telescopic rod of the electric push rod 36, and the push plate 37 is in contact with the rotating rod 32.

[0033] Before the die 3 and punch 4 are closed, the electromagnet 34 needs to be energized. The electromagnet 34 attracts the iron sheet 35 through magnetic energy, causing the iron sheet 35 to rotate around the rotation axis of the rotating lever 32, which in turn drives the rotating levers 32 on both the upper and lower sides to rotate outward and open (e.g. Figure 6As shown), the torsion spring 33 deforms. After the die 3 and the punch 4 are closed, the electromagnet 34 needs to be de-energized so that it no longer attracts the iron sheet 35. The torsion spring 33 will return to its original shape, causing the rotating locking rods 32 on both sides to rotate inward and close, so that the rotating locking rods 32 are locked onto the die 3. Then, the electric push rod 36 drives the push plate 37 to move to the right. When the push plate 37 contacts the rotating locking rod 32, the push plate 37 will push the rotating locking rod 32 and the sliding seat 27 to move to the right. The sliding seat 27 drives the sliding rod 28 and the baffle 30 to move to the right, so that the right half of the baffle 30 is embedded in the groove 31. At this time, the baffle 30 stops moving to the right. The sliding seat 27 will continue to move to the right, and the connecting spring 29 will be compressed. Under the elastic force of the connecting spring 29, the baffle 30 can be pressed into the groove 31, so that the inner side of the baffle 30 blocks the outer side of the forming space between the die 3 and the punch 4. When the molten metal is injected into the forming space between the die 3 and the punch 4, the baffle 30 can prevent the molten metal from overflowing and ensure the appearance quality of the casting. After the casting is formed, the push plate 37 is driven to move to the left to reset by the electric push rod 36, so that the push plate 37 is disengaged from the rotating clamp 32. Then, the rotating clamp 32 is controlled to rotate outward to open, so that the die 3 and the punch 4 can be separated.

[0034] like Figure 8 As shown, it also includes a swing frame 38 and a striking block 39. The swing frame 38 is rotatably connected inside each hollow tube 15, and the striking block 39 is connected to the swing frame 38. The striking block 39 is in contact with the inner wall of the hollow tube 15. When the air pump 22 injects air into the hollow tube 15 through the third diversion pipe 23, the swing frame 38 will swing up and down due to the airflow, which will drive the striking block 39 to swing up and down and strike the inner wall of the hollow tube 15, causing the hollow tube 15 and the push block 16 to vibrate. The vibration of the push block 16 can help the casting to better separate from the mold.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic die-casting equipment for automotive aluminum alloy parts, comprising: a base frame (1); a mounting bracket (2) connected to the top of the base frame (1); a die cavity (3) connected to the mounting bracket (2); a punch (4) slidably connected to the mounting bracket (2); a hydraulic cylinder (5) mounted on the side of the mounting bracket (2), and the telescopic rod of the hydraulic cylinder (5) being connected to the punch (4); and a feed pipe (6) connected to the side of the die cavity (3) and maintaining communication; characterized in that, It also includes: a spray pipe (7), which is connected to the die (3) and the punch (4) respectively and keeps them connected; a storage tank (8), which is connected to the inside of the bottom frame (1); a heating pipe (9), which is installed inside the storage tank (8); an overflow pipe (10), which is connected to the side of the storage tank (8) and keeps them connected, and the end of the overflow pipe (10) extends out of the side of the bottom frame (1); and a preheating assembly, which is set inside the bottom frame (1) and is used to preheat the die (3) and the punch (4).

2. The automatic die-casting equipment for automotive aluminum alloy parts according to claim 1, characterized in that, The preheating assembly includes: a first pump (11), installed inside the bottom frame (1), with the inlet of the first pump (11) connected to and in communication with the storage tank (8); a first diverter pipe (12), connected to and in communication with the outlet of the first pump (11), with the ends of the first diverter pipe (12) connected to and in communication with the sides of the concave mold (3) and the convex mold (4); a second pump (13), installed inside the bottom frame (1), with the outlet of the second pump (13) connected to and in communication with the storage tank (8); and a second diverter pipe (14), connected to and in communication with the inlet of the second pump (13), with the ends of the second diverter pipe (14) connected to and in communication with the sides of the concave mold (3) and the convex mold (4).

3. The automatic die-casting equipment for automotive aluminum alloy parts according to claim 1, characterized in that, It also includes: a hollow tube (15), which is symmetrically slidably connected to the inside of the die (3) and the punch (4); a push block (16), which is connected to one end of the hollow tube (15) and keeps in communication, and the push block (16) has air holes (1601) spaced apart circumferentially; a moving mechanism, which is respectively set on the die (3) and the punch (4) for driving the hollow tube (15) to move; and an air supply mechanism, which is set on the bottom frame (1) for supplying air to the hollow tube (15).

4. The automatic die-casting equipment for automotive aluminum alloy parts according to claim 3, characterized in that, The moving mechanism includes: a mounting plate (17) connected to the sides of the die (3) and the punch (4); a lead screw (18) symmetrically rotatably connected to the mounting plate (17); a connecting plate (19) connected to the hollow tube (15), and the connecting plate (19) is threadedly connected to the lead screw (18); a drive motor (20) mounted on the side of the mounting plate (17), and the output shaft of the drive motor (20) is connected to the end of one of the lead screws (18); and a pulley assembly (21) through which the two lead screws (18) are driven.

5. The automatic die-casting equipment for automotive aluminum alloy parts according to claim 3, characterized in that, The gas supply mechanism includes: an air pump (22) installed on the top of the bottom frame (1); a third diversion pipe (23) connected to the air outlet of the air pump (22) and kept in communication, and the end of the third diversion pipe (23) is connected to the other end of the hollow pipe (15) and kept in communication.

6. The automatic die-casting equipment for automotive aluminum alloy parts according to claim 5, characterized in that, It also includes: a three-way valve (24), installed on the third diversion pipe (23); a connecting pipe (25), connected to the three-way valve (24) and kept in contact; and a control valve (26), installed on the connecting pipe (25).

7. The automatic die-casting equipment for automotive aluminum alloy parts according to claim 1, characterized in that, It also includes a bonding assembly, which includes: a sliding seat (27), symmetrically and slidably connected to the side of the punch (4); a sliding rod (28), symmetrically and slidably connected to the inside of the punch (4), and the sliding rod (28) is slidably connected to the sliding seat (27); a connecting spring (29), with its two ends connected to the sliding seat (27) and the sliding rod (28) respectively; a baffle (30), connected to the end of the sliding rod (28), and the side of the die (3) has a groove (31) whose shape matches the baffle (30); a rotating latch (32) The torsion spring (33) is rotatably connected to the sliding seat (27); the two ends of the torsion spring (33) are respectively connected to the rotating clamp (32) and the sliding seat (27); the electromagnet (34) is installed on the sliding seat (27); the iron sheet (35) is connected to the rotating shaft of the rotating clamp (32), and the electromagnet (34) attracts the iron sheet (35) by magnetic force; the electric push rod (36) is installed on the die (3); the push plate (37) is connected to the telescopic rod of the electric push rod (36), and the push plate (37) is in contact with the rotating clamp (32).

8. The automatic die-casting equipment for automotive aluminum alloy parts according to claim 3, characterized in that, It also includes: a swing frame (38), which is rotatably connected to the inside of the hollow tube (15); and a striking block (39), which is connected to the swing frame (38) and the striking block (39) is in contact with the inner wall of the hollow tube (15).

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