Die-casting forming die for automobile thin-wall parts

Abstract

The invention discloses a die-casting forming die for automobile thin-wall parts, relates to the field of die-casting forming dies, and solves the problem that an existing machining die is difficult to discharge excess materials. The die comprises a base, a die body and a driving machine case, and the die body and the driving machine case are installed at the top of the base; a feeding screw rod is arranged on the inner side of the injection oil cylinder, a granulation tank is mounted at the top of the injection oil cylinder, and an injection connecting pipe is fixedly mounted at one end of the injection oil cylinder; the material cleaning mechanism is used for enabling the injection oil cylinder to discharge materials in an inclined manner, and the material cleaning mechanism is mounted at the top of the base; by means of the material cleaning mechanism, after the injection oil cylinder conveys raw materials to the mold body for a long time, the injection oil cylinder can swing downwards, the injection connecting pipe and the mold body are separated, the raw materials remaining in the injection oil cylinder are discharged along with rotation of the feeding screw, and the problem that remaining materials can be cleaned only through frequent disassembly is solved; therefore, the convenience of cleaning the excess materials of the injection oil cylinder is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of die casting mold, in particular to a die casting mold for automobile thin-wall parts. BACKGROUND

[0002] Non-ferrous metals include aluminum, and aluminum materials are widely used in automobile thin-wall parts. In the field of automobile manufacturing, thin-wall parts are widely used in core parts such as vehicle body and chassis due to their lightweight and high-strength characteristics. The forming quality of the thin-wall parts directly affects the overall performance and safety of the automobile. At present, the die casting process is often used to produce automobile thin-wall parts. This process relies on the cooperation of the mold and the injection system to inject molten metal raw materials into the mold cavity. After cooling, the required parts are obtained. However, the existing die casting mold has obvious technical pain points in long-term use. On the one hand, the injection cylinder, as the core component for transporting raw materials, has residual metal materials inside that are difficult to effectively remove. The traditional cleaning method requires frequent disassembly of the injection cylinder and the mold connection structure, which is not only cumbersome and time-consuming, but also prone to mold precision decline due to collision and wear during disassembly, increasing equipment maintenance costs. In addition, if the metal residue inside the injection pipe is not cleaned in time, it will gradually accumulate and solidify, causing the subsequent raw material delivery channel to be blocked, affecting production continuity, and even causing equipment failure, which restricts the improvement of production efficiency. SUMMARY

[0003] The purpose of the present application is to provide a die casting mold for automobile thin-wall parts to solve the problems raised in the background.

[0004] To achieve the above purpose, the present application provides the following technical scheme: A die casting mold for automobile thin-wall parts, comprising: a base, a mold body and a drive machine box fixedly installed on the top of the base, an injection cylinder provided between the mold body and the drive machine box, a feeding screw provided inside the injection cylinder, a granulating tank fixedly installed on the top of the injection cylinder, and an injection pipe fixedly installed on one end of the injection cylinder close to the mold body; further comprising: a material cleaning mechanism for tilting and discharging the injection cylinder, the material cleaning mechanism being installed on the top of the base; a material scraping mechanism for cleaning the residual raw materials inside the injection pipe, the material scraping mechanism being installed on the inside of the injection pipe; a sealing mechanism for sealing between the mold body and the injection pipe, the sealing mechanism being installed on the outside of the mold body.

[0005] Preferably, the material clearing mechanism includes a support plate fixedly installed on the top of the base. An electric cylinder is hinged between the outer side of the support plate and the bottom of the injection cylinder. An installation cylinder is fixedly installed at the end of the injection cylinder near the drive housing. Two symmetrically distributed connecting plates are fixedly installed at the end of the installation cylinder away from the injection cylinder. A hinge seat is fixedly installed on the top of the support plate. The hinge seat has a U-shaped structure, and its two ends are respectively hinged to the two connecting plates. A drive rod is rotatably installed on the side of the drive housing near the installation cylinder. A rotating block is slidably installed on the inner side of the installation cylinder. A universal joint is fixedly installed between the rotating block and the drive rod. A prismatic insert rod is fixedly installed at the end of the rotating block away from the universal joint. A feeding screw has a cavity for the prismatic insert rod to be inserted and limited at the end near the rotating block. A discharge box is fixedly installed on the top of the base. The discharge box is located directly below the injection connector. A discharge valve is fixedly installed on the outer side of the discharge box.

[0006] Preferably, the scraping mechanism includes a movable slip ring slidably mounted inside the mounting cylinder. The end of the feeding screw near the rotating block extends to the inside of the mounting cylinder. The inner side of the movable slip ring is fixedly connected to the outer side of the feeding screw. A first spring is fixedly mounted between the side of the movable slip ring away from the rotating block and the inner side of the mounting cylinder. Two symmetrically distributed abutment rods are fixedly mounted on the outer side of the movable slip ring. An elongated groove for limiting the sliding of the abutment rods is opened on the outer side of the mounting cylinder. Two symmetrically distributed mounting plates are fixedly mounted on the side of the support plate away from the drive housing. An arc-shaped sliding groove for limiting the sliding of the two abutment rods is opened on the outer side of each of the two mounting plates. The center of the arc-shaped sliding groove is offset from the center of the center ball on the universal joint. A plurality of centrally symmetrically distributed spiral scrapers are fixedly mounted on the end of the feeding screw away from the movable slip ring. The outer side of the spiral scraper is in contact with the inner side of the injection connector.

[0007] Preferably, the sealing mechanism includes a feed pipe fixedly installed on the mold body near the injection connector side, a ball is slidably installed on the outer side of the feed pipe, a feed cavity is formed on the inner side of the ball, an mounting plate is fixedly installed on the outer side of the feed pipe, a second spring is fixedly installed between the mounting plate and the ball, the side of the ball away from the second spring contacts the end of the injection connector, a slide cylinder is fixedly installed on the side of the ball near the second spring, a moving rod is fixedly installed on the inner side of the slide cylinder, a moving groove is formed on the outer side of the feed pipe for the moving rod to slide in a limited manner, a sealing ball is fixedly installed on the outer side of the moving rod, the sealing ball is located on the inner side of the feed pipe, a sealing retaining ring is fixedly installed on the outer side of the feed pipe, the inner diameter of the sealing retaining ring is smaller than the outer diameter of the sealing ball, and the sealing ball is smaller than the inner diameter of the feed pipe.

[0008] Preferably, the injection cylinder has two symmetrically distributed positioning pulleys rotating at the end away from the mounting cylinder, and two symmetrically distributed guide slides are fixedly installed on the top of the base. The outer sides of the two guide slides are respectively provided with guide grooves for limiting the sliding of the two positioning pulleys.

[0009] Preferably, a guide plate is fixedly installed on the top of the discharge box, and the guide plate has a U-shaped structure.

[0010] Preferably, the bottom of the discharge box has an arc-shaped structure.

[0011] Preferably, a limiting ring is fixedly installed on the inner side of the mounting cylinder, and the inner diameter of the limiting ring is larger than the outer diameter of the first spring.

[0012] Preferably, a protective sleeve is fixedly installed on the outer side of the mounting plate, and the inner side of the protective sleeve is in contact with the outer side of the ball.

[0013] Preferably, a sealing ring is fixedly installed at the end of the slide cylinder away from the ball.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention, through a material cleaning mechanism, enables the injection cylinder to swing downwards after it has been supplying raw materials to the mold body for an extended period. This separates the injection connector from the mold body, and as the feeding screw rotates, the residual raw materials inside the injection cylinder are discharged. This solves the problem of needing to frequently disassemble the cylinder to clean up residual materials, thereby improving the convenience of cleaning residual materials from the injection cylinder.

[0015] This invention utilizes a scraping mechanism that allows the push rod to move along an arc-shaped groove on the mounting plate during the downward swing of the injection cylinder. By exploiting the distance difference between the center of the arc-shaped groove and the center of the central ball on the universal joint, the push rod pushes the moving slip ring, thereby moving the feeding screw. This allows the feeding screw to seal the injection cylinder, and the spiral scraper extends to the outside of the injection connector, enabling it to scrape out the residual material inside the injection connector, thus improving the cleaning efficiency of the residual material.

[0016] This invention, through a sealing mechanism, enables the injection cylinder to move the injection connector away from the abutment ball. Utilizing the rebound force of the second spring, the abutment ball, through the slide cylinder, drives the sealing ball to press against the sealing ring, thereby sealing the feed pipe and preventing impurities from entering the feed pipe during cleaning of the injection connector, thus achieving a sealing and protective effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the injection cylinder and discharge box structure in this invention; Figure 3 This is a schematic diagram of the feeding screw and mounting cylinder structure in this invention; Figure 4 for Figure 3 Enlarged structural diagram of area A in the middle; Figure 5 This is a schematic diagram of the abutment and movable slip ring structure in this invention; Figure 6 This is a schematic diagram of the prismatic insert and universal joint structure in this invention; Figure 7 This is a schematic diagram of the material conveying pipe and the ball-stopping structure in this invention; Figure 8 This is a schematic diagram of the sealing ball and sealing retaining ring structure in this invention.

[0018] In the diagram: 1. Base; 2. Mold body; 3. Drive housing; 4. Injection cylinder; 5. Feed screw; 6. Granulation tank; 7. Injection connector; 8. Support plate; 9. Electric cylinder; 10. Mounting cylinder; 11. Connecting plate; 12. Hinge seat; 13. Drive rod; 14. Rotary block; 15. Universal joint; 16. Prismatic insert rod; 17. Discharge box; 18. Discharge valve; 19. Moving slip ring; 20. First spring; 21. Abutment rod; 22. Mounting plate; 23. Spiral scraper; 24. Conveyor pipe; 25. Abutment ball; 26. Mounting plate; 27. Second spring; 28. Slide cylinder; 29. ​​Moving rod; 30. Sealing ball; 31. Sealing retaining ring; 32. Positioning pulley; 33. Guide slide plate; 34. Guide plate; 35. Limiting ring; 36. Protective sleeve; 37. Sealing ring. Detailed Implementation

[0019] 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.

[0020] Example 1: Please refer to Figures 1-8 The figure shows a die-casting mold for thin-walled automotive parts, including a base 1, a mold body 2 and a drive housing 3 fixedly installed on the top of the base 1, an injection cylinder 4 between the mold body 2 and the drive housing 3, a feeding screw 5 inside the injection cylinder 4, a granulation tank 6 fixedly installed on the top of the injection cylinder 4, the granulation tank 6 feeding raw materials into the injection cylinder 4, and an injection connector 7 fixedly installed at the end of the injection cylinder 4 near the mold body 2, so that the feeding screw 5 injects raw materials into the mold body 2 through the injection connector 7; it also includes a cleaning mechanism for tilting the injection cylinder 4 to discharge material, the cleaning mechanism being installed on the top of the base 1.

[0021] The cleaning mechanism includes a support plate 8 fixedly mounted on the top of the base 1. An electric cylinder 9 is hinged between the outer side of the support plate 8 and the bottom of the injection cylinder 4. When the electric cylinder 9 operates, it can pull the injection cylinder 4 downward. A mounting cylinder 10 is fixedly mounted on the end of the injection cylinder 4 near the drive housing 3. Two symmetrically distributed connecting plates 11 are fixedly mounted on the end of the mounting cylinder 10 away from the injection cylinder 4. A hinge seat 12 is fixedly mounted on the top of the support plate 8. The hinge seat 12 has a U-shaped structure, and its two ends are respectively hinged to the two connecting plates 11, so that when the electric cylinder 9 operates, it can... The injection cylinder 4 is able to swing downwards around the hinge point between the hinge seat 12 and the connecting plate 11. A drive rod 13 is rotatably mounted on the side of the drive housing 3 near the mounting cylinder 10, and the drive housing 3 can drive the drive rod 13 to rotate. A rotating block 14 is slidably mounted on the inner side of the mounting cylinder 10. A universal joint 15 is fixedly mounted between the rotating block 14 and the drive rod 13, so that when the injection cylinder 4 drives the mounting cylinder 10 to swing downwards synchronously, the drive rod 13 can drive the inclined rotating block 14 to rotate through the universal joint 15. A prismatic insert rod 16 is fixedly mounted on the end of the rotating block 14 away from the universal joint 15. The feeding screw 5 is close to the rotating block. One end of the rotating block 14 has a cavity for the insertion of the rhomboid rod 16, allowing the rotating block 14 to drive the feeding screw 5 to rotate via the rhomboid rod 16, thereby conveying and discharging the raw material. A discharge box 17 is fixedly installed on the top of the base 1, located directly below the injection connector 7, so that when the injection connector 7 is tilted downwards, the remaining material in the injection connector 7 can fall into the discharge box 17. A discharge valve 18 is fixedly installed on the outside of the discharge box 17. The bottom of the discharge box 17 has an arc-shaped structure, which facilitates the discharge of the remaining material along the arc surface of the bottom of the discharge box 17 from the discharge valve 18. A guide is fixedly installed on the top of the discharge box 17. The guide plate 34 has a U-shaped structure. During the tilting and swinging of the injection connector 7, the remaining material in the injection connector 7 can fall into the discharge box 17 along the guide plate 34. The end of the injection cylinder 4 away from the mounting cylinder 10 has two symmetrically distributed positioning pulleys 32. The top of the base 1 is fixedly installed with two symmetrically distributed guide slide plates 33. The outer sides of the two guide slide plates 33 are respectively provided with guide grooves for the two positioning pulleys 32 to slide in a limited manner, so that the injection cylinder 4 can drive the positioning pulleys 32 to move along the guide grooves on the guide slide plates 33, thereby improving the stability of the movement of the injection cylinder 4.

[0022] Example 2: Please refer to Figures 1-6This embodiment further illustrates Example 1. The scraping mechanism shown in the figure includes a movable slip ring 19 slidably mounted inside the mounting cylinder 10. One end of the feeding screw 5 near the rotating block 14 extends to the inside of the mounting cylinder 10. The inner side of the movable slip ring 19 is fixedly connected to the outer side of the feeding screw 5, so that when the movable slip ring 19 moves, it can drive the feeding screw 5 to move along the outer side of the prismatic insert 16, so that the end of the feeding screw 5 abuts against the inner side of the injection connector 7, thereby sealing the injection connector 7. A first spring 20 is fixedly mounted between the side of the movable slip ring 19 away from the rotating block 14 and the inner side of the mounting cylinder 10, which facilitates the movement and reset of the movable slip ring 19. Two symmetrically distributed abutment rods 21 are fixedly mounted on the outer side of the movable slip ring 19. An elongated groove is provided on the outer side of the mounting cylinder 10 for the abutment rods 21 to slide in a limited manner. Two symmetrically distributed mounting plates 22 are fixedly mounted on the side of the support plate 8 away from the drive housing 3. The outer sides of the two mounting plates 22 are respectively provided for the two abutment rods 21 to slide in a limited manner. The limiting sliding arc-shaped groove, with its center offset from the center of the central ball on the universal joint 15, allows the injection cylinder 4 to swing, driving the two abutment rods 21 to move along the arc-shaped grooves on the corresponding mounting plates 22. Utilizing the distance difference between the center of the arc-shaped groove and the center of the central ball on the universal joint 15, the abutment rods 21 can move along the elongated groove on the mounting cylinder 10 during movement, thus realizing the movement of the sliding ring 19. A limiting ring 35 is fixedly installed on the inner side of the mounting cylinder 10. The inner diameter of the limiting ring 35 is larger than the outer diameter of the first spring 20, which provides a limit for the movement of the moving slip ring 19, prevents the feeding screw 5 from pressing too hard on the injection connector 7, and ensures the normal rotation of the feeding screw 5. A plurality of spiral scrapers 23 are fixedly installed at the end of the feeding screw 5 away from the moving slip ring 19, and the outer side of the spiral scraper 23 contacts the inner side of the injection connector 7, so that the feeding screw 5 can clean the residual material on the inner side of the injection connector 7 through the spiral scraper 23.

[0023] Example 3: Please refer to Figures 1-8This embodiment further illustrates other embodiments. The sealing mechanism shown in the figure includes a feed pipe 24 fixedly installed on the side of the mold body 2 near the injection connector 7, allowing raw materials to be injected into the mold body 2 through the feed pipe 24. A ball bearing 25 is slidably installed on the outer side of the feed pipe 24, and a feed cavity is opened on the inner side of the ball bearing 25. A mounting plate 26 is fixedly installed on the outer side of the feed pipe 24, and a second spring 27 is fixedly installed between the mounting plate 26 and the ball bearing 25. The side of the ball bearing 25 away from the second spring 27 contacts the end of the injection connector 7. The elasticity of the second spring 27 causes the ball bearing 25 to press against the end of the injection connector 7, allowing the injection connector 7 to inject raw materials into the feed cavity of the ball bearing 25, and then into the feed pipe 24 from the feed cavity, thus sending the raw materials into the mold body 2. A slide cylinder 28 is fixedly installed on the side of the ball bearing 25 near the second spring 27, and a moving rod 29 is fixedly installed on the inner side of the slide cylinder 28. A sliding limit is opened on the outer side of the feed pipe 24 for the moving rod 29 to slide. The moving groove and the sliding cylinder 28 provide a seal for the moving groove. A sealing ball 30 is fixedly installed on the outside of the moving rod 29. The sealing ball 30 is located inside the conveying pipe 24. A sealing retaining ring 31 is fixedly installed on the outside of the conveying pipe 24. The inner diameter of the sealing retaining ring 31 is smaller than the outer diameter of the sealing ball 30, and the outer diameter of the sealing ball 30 is smaller than the inner diameter of the conveying pipe 24. This allows the raw material to pass through the sealing retaining ring 31 and enter the conveying pipe 24 when the sealing ball 30 is away from the sealing retaining ring 31. Thus, the abutment ball 25 is away from the injection... When the connecting pipe 7 is connected, the rebound force of the second spring 27 is used to make the ball 25 drive the sealing ball 30 on the moving rod 29 to press against the sealing ring 31, thereby sealing the conveying pipe 24. A protective sleeve 36 is fixedly installed on the outside of the mounting plate 26. The inside of the protective sleeve 36 is in contact with the outside of the ball 25, providing guidance for the movement of the ball 25. A sealing ring 37 is fixedly installed at the end of the slide cylinder 28 away from the ball 25 to prevent outside air from entering the conveying pipe 24 from the inside of the slide cylinder 28.

[0024] Working principle: First, the operator starts the electric cylinder 9, which pulls the injection cylinder 4 downward. The injection cylinder 4 drives the mounting cylinder 10 to move synchronously, causing the mounting cylinder 10 to swing downward around the connection point between the hinge seat 12 and the connecting plate 11. The injection pipe 7 can also swing downward synchronously. At this time, the injection cylinder 4 drives the injection pipe 7 away from the ball 25. Using the rebound force of the second spring 27, the ball 25 moves along the inner side of the protective sleeve 36. The ball 25 drives the slide cylinder 28 along the conveying pipe. The outward movement of 24 causes the sealing ball 30 on the sliding cylinder 28, which in turn moves the moving rod 29, to contact the sealing retaining ring 31 on the inner side of the conveying pipe 24, thus sealing the conveying pipe 24. Simultaneously, the injection connector 7 drives the feeding screw 5 to swing synchronously, and the mounting cylinder 10 drives the two abutment rods 21 on the outer side of the moving slip ring 19 to swing synchronously downwards, causing the abutment rods 21 to move along the arc-shaped groove on the mounting plate 22. Utilizing the distance difference between the center of the arc-shaped groove and the center of the central ball on the universal joint 15, the abutment rods 21 move... During the process, it can move along the long groove on the mounting cylinder 10. The push rod 21 can drive the moving slip ring 19 to move along the inner side of the mounting cylinder 10. The moving slip ring 19 can push the feeding screw 5 to move along the inner side of the injection cylinder 4, so that the end of the feeding screw 5 can abut against the inner side of the injection connector 7, and the spiral scraper 23 extends to the outer side of the injection connector 7. At this time, the end of the injection connector 7 faces the top of the discharge box 17. The operator starts the drive housing 3, so that the drive housing 3 drives the drive rod 13 to rotate. The drive rod 13 drives the rotating block 14 to rotate via the universal joint 15. The rotating block 14 drives the feeding screw 5 to rotate via the prismatic insert rod 16. The feeding screw 5 drives the spiral scraper 23 to make a circular motion along the inner side of the injection connector 7. Finally, as the spiral scraper 23 rotates, it scrapes out the remaining material in the injection connector 7 and pushes it into the discharge box 17, thus cleaning the remaining material. There is no need to disassemble the injection cylinder 4, which improves the durability of the injection cylinder 4 and achieves the effect of safe material cleaning.

[0025] 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.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold for thin-walled automotive parts, characterized in that, include: The base (1) is installed on the top of the base (1) and the mold body (2) and the drive housing (3). An injection cylinder (4) is provided between the mold body (2) and the drive housing (3). A feeding screw (5) is provided on the inner side of the injection cylinder (4). A granulation tank (6) is installed on the top of the injection cylinder (4). An injection connector (7) is fixedly installed at one end of the injection cylinder (4). Also includes: A material clearing mechanism is used to tilt the injection cylinder (4) to discharge material. The material clearing mechanism is installed on the top of the base (1). A scraping mechanism is used to clean the raw material remaining inside the injection connector (7), and the scraping mechanism is installed inside the injection connector (7); A sealing mechanism is used to seal between the mold body (2) and the injection nozzle (7), and the sealing mechanism is installed on the outside of the mold body (2).

2. The die-casting mold for thin-walled automotive parts according to claim 1, characterized in that: The cleaning mechanism includes a support plate (8) mounted on the top of the base (1). An electric cylinder (9) is hinged between the outer side of the support plate (8) and the bottom of the injection cylinder (4). An installation cylinder (10) is fixedly mounted on one end of the injection cylinder (4). Two connecting plates (11) are fixedly mounted on one end of the installation cylinder (10). A hinge seat (12) is mounted on the top of the support plate (8). The two ends of the hinge seat (12) are respectively hinged to the two connecting plates (11). In the assembly, a drive rod (13) is rotatably mounted on one side of the drive housing (3), a rotating block (14) is slidably mounted on the inner side of the mounting cylinder (10), a universal joint (15) is installed between the rotating block (14) and the drive rod (13), a prismatic insert rod (16) is fixedly mounted on one end of the rotating block (14), a cavity is opened at one end of the feeding screw (5) for the prismatic insert rod (16) to be limited and inserted, and a discharge box (17) is fixedly mounted on the top of the base (1).

3. The die-casting mold for thin-walled automotive parts according to claim 2, characterized in that: The scraping mechanism includes a movable slip ring (19) slidably installed inside the mounting cylinder (10). One end of the feeding screw (5) extends to the inside of the mounting cylinder (10). The inside of the movable slip ring (19) is fixedly connected to the outside of the feeding screw (5). A first spring (20) is fixedly installed between one side of the movable slip ring (19) and the inside of the mounting cylinder (10). Two abutment rods (21) are fixedly installed on the outside of the movable slip ring (19). A long groove for limiting the sliding of the abutment rods (21) is opened on the outside of the mounting cylinder (10). Two mounting plates (22) are fixedly installed on one side of the support plate (8). Arc-shaped grooves for limiting the sliding of the two abutment rods (21) are opened on the outside of the two mounting plates (22). The center of the arc-shaped grooves is offset from the center of the center ball on the universal joint (15). A plurality of spiral scraper blades (23) are fixedly installed on one end of the feeding screw (5).

4. The die-casting mold for thin-walled automotive parts according to claim 3, characterized in that: The sealing mechanism includes a material conveying pipe (24) installed on one side of the mold body (2). A ball (25) is slidably installed on the outer side of the material conveying pipe (24). A material conveying cavity is opened on the inner side of the ball (25). An installation plate (26) is fixedly installed on the outer side of the material conveying pipe (24). A second spring (27) is fixedly installed between the installation plate (26) and the ball (25). One side of the ball (25) is in contact with the end of the injection connector (7). The ball (25) is close to the second spring (27). A slide cylinder (28) is fixedly installed on one side of the 7), and a moving rod (29) is fixedly installed on the inner side of the slide cylinder (28). A moving groove for the moving rod (29) to be limited and slid is opened on the outer side of the conveying pipe (24). A sealing ball (30) is fixedly installed on the outer side of the moving rod (29), and a sealing retaining ring (31) is fixedly installed on the outer side of the conveying pipe (24). The inner diameter of the sealing retaining ring (31) is smaller than the outer diameter of the sealing ball (30), and the sealing ball (30) is smaller than the inner diameter of the conveying pipe (24).

5. The die-casting mold for thin-walled automotive parts according to claim 1, characterized in that: One end of the injection cylinder (4) has two symmetrically distributed positioning pulleys (32) rotating. The top of the base (1) is equipped with two guide slide plates (33). The outer sides of the two guide slide plates (33) are respectively provided with guide grooves for limiting the sliding of the two positioning pulleys (32).

6. The die-casting mold for thin-walled automotive parts according to claim 2, characterized in that: The top of the discharge box (17) is equipped with a guide plate (34), which has a U-shaped structure.

7. The die-casting mold for thin-walled automotive parts according to claim 2, characterized in that: The bottom of the discharge box (17) has an arc-shaped structure.

8. The die-casting mold for thin-walled automotive parts according to claim 3, characterized in that: A limiting ring (35) is fixedly installed on the inner side of the mounting cylinder (10), and the inner diameter of the limiting ring (35) is larger than the outer diameter of the first spring (20).

9. The die-casting mold for thin-walled automotive parts according to claim 4, characterized in that: A protective sleeve (36) is fixedly installed on the outer side of the mounting plate (26), and the inner side of the protective sleeve (36) is in contact with the outer side of the ball (25).

10. A die-casting mold for thin-walled automotive parts according to claim 4, characterized in that: A sealing ring (37) is fixedly installed at one end of the slide (28).

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