Aluminum die casting mold for motorcycle shock absorber cylinder

Abstract

The utility model discloses a motorcycle shock attenuation cylinder die casting die, including fixed module, the fixed module inboard is fixed with fixed mould core, and the fixed mould core inside is provided with the upper mould cavity, and the fixed module below is equipped with the movable module who is matched with it, and the movable module inboard is fixed with movable mould core, and the movable mould core inboard is provided with the lower mould cavity who is matched with the upper mould cavity, and the movable module bottom both sides are fixed with the mould foot, and the mould foot between both sides is equipped with the top rod, and the top rod top is fixed with a plurality of thimble, and the top rod bottom is fixed with a plurality of bottom plate, and the thimble inserts movable module with movable mould core inboard and with movable module and movable mould core sliding connection, and the movable module both sides are equipped with first core pulling mechanism and second core pulling mechanism respectively. The utility model is through the process of die casting forming to shock attenuation cylinder body and carries out die casting forming, and compared with traditional pouring forming process production cycle is fast, and the qualified rate is greatly improved, and the shock attenuation cylinder body precision after forming is higher, and the surface is more smooth, and the strength is higher, and is suitable for mass production.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle shock absorber aluminum cylinder manufacturing technology, and in particular to a motorcycle shock absorber cylinder die casting mold. Background Technology

[0002] As a key load-bearing component of a motorcycle, the shock absorber must possess both high strength and lightweight characteristics.

[0003] Traditional processes generally employ gravity casting using metal molds, which can be divided into solid casting and hollow casting. Molten aluminum fills the mold cavity by gravity and solidifies naturally upon cooling.

[0004] Because the aluminum cylinder of a motorcycle shock absorber is long and the wall is thin, the traditional casting process generally has a low success rate in casting. In addition, after casting, it is necessary to perform processes such as sawing the inner sprue and rough drilling the inner hole, which are quite complicated.

[0005] Based on this, those skilled in the art have proposed a motorcycle shock absorber die-casting mold, which provides a new solution to the above-mentioned technical problems. Utility Model Content

[0006] Therefore, it is necessary to provide a motorcycle shock absorber die-casting mold to address the problems raised in the background art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] The aforementioned motorcycle shock absorber die-casting mold specifically includes a fixed module, a fixed mold core fixed inside the fixed module, an upper cavity inside the fixed mold core, a matching moving module below the fixed module, a moving mold core fixed inside the moving module, a lower cavity matching the upper cavity inside the moving mold core, mold feet fixed on both sides of the bottom of the moving module, a push rod between the mold feet on both sides, a plurality of ejector pins fixed on the top of the push rod, a plurality of base plates fixed on the bottom of the push rod, the ejector pins inserting into the moving module and the inner side of the moving mold core and slidingly connecting the moving module and the moving mold core; a first core-pulling mechanism and a second core-pulling mechanism are respectively provided on both sides of the moving module.

[0009] Preferably, a sprue is provided on the fixed mold core between the upper cavities on both sides, a sprue sleeve is fixed on the fixed mold core at the end of the sprue, a guide block is fixed on the inner side of the moving mold core below the sprue, a runner is provided on both sides of the guide block near the lower cavity, a transverse sprue is provided on both sides of the top of the moving mold core along the runner, and a plurality of ingates are provided on the moving mold core on the side of the lower cavity near the same side as the transverse sprue, and the sprue, the runner, the transverse sprue, and the plurality of ingates are interconnected with the corresponding lower cavity.

[0010] Preferably, the moving mold core has a plurality of first overflow grooves on the side of the lower cavity away from the horizontal runner, and the first overflow grooves are connected to the internal space of the lower cavity on the same side.

[0011] Preferably, a third overflow groove is provided on the inner side of the moving mold core and the fixed mold core and at the end of the lower cavity near the guide block, and a second overflow groove is provided on the inner side of the moving mold core and the fixed mold core and at the end of the lower cavity away from the guide block. Both the third overflow groove and the second overflow groove are connected to the internal space of the corresponding lower cavity and the upper cavity.

[0012] Preferably, the first overflow groove, the second overflow groove, the third overflow groove, the horizontal runner, the flow channel, and the inner runner are all provided with ejector pin holes that are adapted to the corresponding ejector pins, and a plurality of ejector pins are respectively inserted into the corresponding ejector pin holes.

[0013] Preferably, the first core-pulling mechanism includes drive slant rods fixed on both sides of the fixed module near the end of the third overflow groove. The bottom of the drive slant rods is inclined outward. The moving module has slide rails fixed inside both sides near the end of the drive slant rods. A second slider is slidably connected to the inside of the slide rails. The drive slant rods are inserted into and slidably connected to the corresponding second slider. A second core-pulling rod is fixed to the end of the second slider near the corresponding lower cavity. The moving mold core and the fixed mold core have second core-pulling cavities on both sides of the end of the moving mold core and the end of the fixed mold core near the second core-pulling rod, which match the second core-pulling rod. The second core-pulling rods are inserted into and slidably connected to the inside of the corresponding second core-pulling cavity. The second core-pulling cavity is interconnected with the inner space of the corresponding third overflow groove.

[0014] Preferably, the second core-pulling mechanism includes a mounting bracket fixed to the end of the moving module away from the third overflow groove. A core-pulling cylinder is mounted on the end of the mounting bracket away from the moving module. A first slider is fixedly connected to the output end of the core-pulling cylinder. The first slider is slidably connected to the inner side of the mounting bracket. First core-pulling rods are fixed on both sides of the first slider near the lower cavity. The moving mold core and the fixed mold core have first core-pulling cavities adapted to the first core-pulling rods on both sides of the inner side of the end near the first core-pulling rods. The first core-pulling rods are inserted into and slidably connected to the inner side of the corresponding first core-pulling cavity. The first core-pulling cavity is in communication with the inner space of the corresponding second overflow groove.

[0015] Preferably, a positioning rod is slidably connected to the top of the mounting bracket and above the core-pulling cylinder. A connecting plate is fixed to one end of the positioning rod near the mounting bracket. The connecting plate is fixedly sleeved on the output end of the core-pulling cylinder. A displacement control block is fixed to the outside of the positioning rod. Limit switches are installed on the top of the mounting bracket and on both sides of the displacement control block.

[0016] Preferably, the fixed mold core and the moving mold core are fixed with a third core-pulling rod on the inner side of the end near the second core-pulling rod, and when the fixed mold core and the moving mold core are closed, the opposite ends of the two third core-pulling rods are attached to the outer surface of the second core-pulling rod, and the central axes of the two third core-pulling rods are collinear and coincide with the central axis of the second core-pulling rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention describes a process for die-casting the shock absorber body. Compared to the traditional casting process, this method has a faster production cycle, a significantly higher pass rate, and produces a shock absorber body with higher precision, a smoother surface, and higher strength, making it suitable for mass production.

[0019] This invention allows for the treatment of the external gating system only in subsequent processes after the shock absorber body is formed, which greatly reduces the complexity of subsequent processes, lowers production costs, and reduces the labor required for subsequent processing. Attached Figure Description

[0020] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the shock absorber body of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the fixed panel and the movable panel of this utility model;

[0023] Figure 3 This is a schematic diagram of the axial view structure of this utility model;

[0024] Figure 4 This is a top view of the structure of this utility model;

[0025] Figure 5 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the first core-pulling mechanism and the second core-pulling mechanism of this utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the moving mold core of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the fixed mold core of this utility model.

[0029] The markings in the diagram are explained as follows:

[0030] 1. Shock absorber body; 2. Fixed panel; 3. Moving panel; 4. Fixed module; 5. Moving module; 6. Mold foot; 7. Base plate; 8. Ejector rod; 9. Ejector pin; 10. Mounting bracket; 11. Core-pulling cylinder; 12. First slider; 13. First core-pulling rod; 14. Positioning rod; 15. Connecting plate; 16. Displacement control block; 17. Limit switch; 18. Drive slant rod; 19. Second slider; 20. Second core-pulling rod; 21. Slide rail; 22. Fixed mold core; 23. Moving mold core; 24. Third core-pulling rod; 25. Lower cavity; 26. Guide block; 27. Horizontal runner; 28. Inner runner; 29. ​​First overflow groove; 30. First core-pulling cavity; 31. Second overflow groove; 32. Second core-pulling cavity; 33. Third overflow groove; 34. Upper cavity; 35. Straight runner; 36. Sprue sleeve. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0032] Please refer to Figure 1-8This utility model provides a motorcycle shock absorber die-casting mold, including a fixed module 4. A fixed panel 2 is fixed to the top of the fixed module 4 by pins. The fixed panel 2 is typically fixedly installed on the die-casting machine near the metal injection port. A fixed mold core 22 is fixed inside the fixed module 4, and an upper cavity 34 is formed inside the fixed mold core 22. A matching moving module 5 is provided below the fixed module 4. A moving mold core 23 is fixed inside the moving module 5, and a lower cavity 25 matching the upper cavity 34 is formed inside the moving mold core 23. Mold feet 6 are fixed on both sides of the bottom of the moving module 5. A moving panel 3 is fixed below the mold feet 6 on both sides for mounting the mold feet 6 and supporting the mold feet 6 and the moving module 5. A push rod 8 is provided between the mold feet 6 on both sides. Several ejector pins 9 are fixed to the top of the push rod 8, and a... Several base plates 7 and ejector pins 9 are inserted into the inner side of the moving module 5 and the moving mold core 23 and are slidably connected to the moving module 5 and the moving mold core 23. The moving module 5 is provided with a first core pulling mechanism and a second core pulling mechanism on both sides. The upper cavity 34 and the lower cavity 25 together form a cavity that matches the shock absorber body 1. The fixed mold core 22 or the moving mold core 23 is fixed to the inner side of the corresponding fixed module 4 or the moving module 5 by positioning pins or positioning screws. The inner side of the shock absorber body 1 is hollow, and the end is provided with mutually perpendicular horizontal holes and vertical holes. The central axes of the horizontal holes and vertical holes are perpendicular to each other and coincide. The first core pulling mechanism is used to form the horizontal holes, and the second core pulling mechanism is used to form the hollow space inside the shock absorber body 1. The lower cavity 25 and the upper cavity 34 are used to form the outer shell shape of the shock absorber body 1.

[0033] It should be noted that the principle of controlling the displacement movement of ejector rod 8 and ejector pin 9 on the die-casting machine is existing technology. The movement principle of ejector pin 9 belongs to the demolding mechanism principle, which is used to eject the molded shock absorber body 1 from the lower cavity 25 and the upper cavity 34 after die casting, to prevent the shock absorber body 1 from sticking to the mold. When the mold is closed, the top end face of ejector pin 9 is flush with the inner end of the lower cavity 25. The driving force for the movement of ejector pin 9 is usually achieved by hydraulic drive or mechanical drive. Hydraulic drive is the most common method. The ejector rod 8 is pushed by a hydraulic cylinder, which in turn drives the ejector pin 9. The hydraulic system can precisely control the ejection force, speed and stroke. Mechanical drive uses mechanical linkage during mold opening, such as inclined guide pillars, connecting rods or crank mechanisms, to convert the mold opening and closing movement into the ejection and resetting of ejector pin 9.

[0034] Please refer to Figure 4-8A sprue 35 is provided on the fixed mold core 22 between the upper cavities 34 on both sides. The sprue 35 is adapted to the nozzle of the die-casting machine. A sprue sleeve 36 is fixed on the fixed module 4 at the end of the sprue 35. The sprue sleeve 36 is used for the installation and positioning of the fixed module 4. A guide block 26 is fixed inside the moving mold core 23 below the sprue 35. The guide block 26 has runners on both sides at the end near the lower cavity 25. Horizontal runners 27 are provided on both sides of the top of the moving mold core 23 along the runners. The flow channel on the guide block 26 is used to distribute the molten metal to the horizontal runner 27 of each cavity. Several ingates 28 are provided on the moving mold core 23 and on the side of the lower cavity 25 near the horizontal runner 27. The sprue 35, the flow channel, the horizontal runner 27, and the several ingates 28 are interconnected with the corresponding lower cavity 25. After the molten metal is injected from the nozzle, it flows through the flow channel, the horizontal runner 27, and each ingate 28 in sequence before entering the corresponding lower cavity 25 and the inner side of the third core pull rod 24 for molding.

[0035] Please refer to Figure 7 A number of first overflow grooves 29 are provided on the moving mold core 23 and on the side of the lower cavity 25 away from the horizontal runner 27. The first overflow grooves 29 are connected to the internal space of the lower cavity 25 on the same side. The first overflow grooves 29 are provided to collect cold metal and gas, reduce defects after the shock absorber body 1 is die-cast, and can also perform auxiliary venting.

[0036] Please refer to Figure 7 A third overflow groove 33 is provided on the inner side of the moving mold core 23 and the fixed mold core 22, and at the end of the lower cavity 25 near the guide block 26. A second overflow groove 31 is provided on the inner side of the moving mold core 23 and the fixed mold core 22, and at the end of the lower cavity 25 away from the guide block 26. Both the third overflow groove 33 and the second overflow groove 31 are connected to the internal space of the corresponding lower cavity 25 and upper cavity 34. The second overflow groove 31 and the third overflow groove 33 serve as overflow grooves at both ends of the shock absorber body 1 during molding. They can guide the low-temperature metal into the overflow grooves during molding to prevent it from mixing into the casting body and causing incomplete fusion or surface defects. On the other hand, when the molten metal passes through the second overflow groove 31 or the third overflow groove 33 at the end of filling, it drives the gas outward, reducing the internal porosity and surface bubbles of the casting. At the same time, by increasing the flow resistance at the end, the filling speed and pressure of the molten metal can be balanced, so that the molten metal fills the cavity more smoothly and evenly, reducing turbulence and air entrapment.

[0037] Please refer to Figure 4-8The first overflow groove 29, the second overflow groove 31, the third overflow groove 33, the horizontal runner 27, the runner and the ingate 28 are all provided with ejector pin holes that are adapted to the corresponding ejector pins 9. Several ejector pins 9 are respectively inserted into the corresponding ejector pin holes. The ejector pin holes are located inside the first overflow groove 29, the second overflow groove 31, the third overflow groove 33, the horizontal runner 27, the runner and the ingate 28 to avoid defects when the top end face of the ejector pin 9 is ejected from the product surface, and improve the aesthetics of the product appearance.

[0038] Please refer to Figure 2-6 The first core-pulling mechanism includes drive slant rods 18 fixed on both sides of the inner side of the fixed module 4 near the third overflow groove 33. The bottom of the drive slant rods 18 is inclined outward. Slide rails 21 are fixed inside the moving module 5 near the drive slant rods 18. A second slider 19 is slidably connected inside the slide rails 21. The drive slant rods 18 are inserted into and slidably connected to the corresponding second slider 19. A second core-pulling rod 20 is fixed at the end of the second slider 19 near the corresponding lower cavity 25. The moving mold core 23 and the fixed mold core 22 have second core-pulling cavities 32 on both sides of the inner side of the end near the second core-pulling rod 20, which match the second core-pulling rod 20. The second core-pulling rod 20 is inserted into and slidably connected inside the corresponding second core-pulling cavity 32. The second core-pulling cavity 32 and the inner space of the corresponding third overflow groove 33 are mutually... When the fixed mold core 22 and the moving mold core 23 are joined together, the drive slant rod 18 is inserted into the inner side of the second slider 19. At this time, the second core-pulling rod 20 is inserted into the inner side of the second core-pulling cavity 32. When the shock absorber body 1 is formed, the molten metal is formed on the outer periphery of the second core-pulling rod 20. After the shock absorber body 1 is formed, the fixed module 4 and the moving module 5 are separated, that is, the fixed mold core 22 and the moving mold core 23 are separated. At this time, the drive slant rod 18 is gradually pulled away from the inner side of the second slider 19. During the upward movement of the drive slant rod 18, since the drive slant rod 18 is inclined, the second slider 19 will gradually slide outward. At this time, the second core-pulling rod 20 follows the second slider 19 and gradually slides outward, so that the second core-pulling rod 20 is gradually pulled away from the inner side of the end of the shock absorber body 1, forming a transverse hole at the end of the shock absorber body 1.

[0039] Please refer to Figure 2-8The second core-pulling mechanism includes a mounting bracket 10 fixed to the end of the moving module 5 away from the third overflow groove 33. A core-pulling cylinder 11 is mounted on the end of the mounting bracket 10 away from the moving module 5. A first slider 12 is fixedly connected to the output end of the core-pulling cylinder 11. The first slider 12 is slidably connected to the inner side of the mounting bracket 10. First core-pulling rods 13 are fixed on both sides of the end of the first slider 12 near the lower cavity 25. The moving mold core 23 and the fixed mold core 22 have first core-pulling cavities 30 on both sides of the end near the first core-pulling rod 13, which are adapted to the first core-pulling rod 13. The first core-pulling rod 13 is inserted into and slidably connected to the inner side of the corresponding first core-pulling cavity 30. The first core-pulling cavity 30 and the corresponding... The inner spaces of the corresponding second overflow groove 31 are interconnected. When the fixed mold core 22 and the moving mold core 23 are combined, the core-pulling cylinder 11 is activated to drive the first core-pulling rod 13 to be inserted into the inner side of the lower cavity 25 and the upper cavity 34. When the shock absorber body 1 is formed, the molten metal is formed on the outer periphery of the second core-pulling rod 20 and the driving inclined rod 18 simultaneously on the inner side of the lower cavity 25 and the upper cavity 34. After the shock absorber body 1 is formed, the core-pulling cylinder 11 is activated to drive the first slider 12 and the first core-pulling rod 13 to move away from the shock absorber body 1, so that the first core-pulling rod 13 is pulled out from the inner side of the shock absorber body 1, thereby forming the inner space of the shock absorber body 1.

[0040] Please refer to Figure 3-6 A positioning rod 14 is slidably connected to the top of the mounting bracket 10 and above the core-pulling cylinder 11. A connecting plate 15 is fixed to one end of the positioning rod 14 near the mounting bracket 10. The connecting plate 15 is fixedly sleeved on the output end of the core-pulling cylinder 11. A displacement control block 16 is fixed to the outside of the positioning rod 14. Limit switches 17 are installed on the top of the mounting bracket 10 and on both sides of the displacement control block 16. The limit switches 17 are used to detect whether the piston rod of the core-pulling cylinder 11 has reached the set target position, and can limit the extension and retraction distance of the output end of the core-pulling cylinder 11. They are electrically connected to a controller through wires. The controller receives the signal from the limit switches 17, processes it, and issues a control command. The controller is electrically connected to a solenoid valve via a wire to receive control command signals from the controller. The solenoid valve is electrically connected to the core-pulling cylinder 11 via a wire. According to the control signal, the air path direction is switched to control the extension and retraction of the core-pulling cylinder 11. When the core-pulling cylinder 11 is started, it will drive the positioning rod 14 to move along with its output end through the connecting plate 15. When the positioning rod 14 moves, the displacement control block 16 will move along with it. When the displacement control block 16 moves to the input end of the contact limit switch 17, the core-pulling cylinder 11 stops moving. It should be noted that the process of controlling the extension and retraction of the cylinder through the limit switch is existing technology and will not be described in detail here.

[0041] Please refer to Figure 5The fixed mold core 22 and the moving mold core 23 are fixed with a third core-pulling rod 24 on the inner side of one end near the second core-pulling rod 20. When the fixed mold core 22 and the moving mold core 23 are closed, the opposite ends of the two third core-pulling rods 24 are attached to the outer surface of the second core-pulling rod 20. The central axes of the two third core-pulling rods 24 are collinear and coincide with the central axis of the second core-pulling rod 20. The third core-pulling rod 24 is used to form the vertical hole at the end of the shock absorber body 1 near the second core-pulling rod 20. When the fixed mold core 22 and the moving mold core 23 are separated, the third core-pulling rod 24 is pulled out from the inner side of the formed shock absorber body 1 to form the vertical hole at its end.

[0042] The specific working principle of the motorcycle shock absorber die-casting mold provided by this utility model is as follows:

[0043] During the die casting of the shock absorber body 1, the fixed mold core 22 and fixed module 4 are fixedly mounted on the die casting machine along with the fixed panel 2. The moving mold core 23, moving module 5, mold foot 6, ejector rod 8, and ejector pin 9 are mounted on the die casting machine along with the moving panel 3 and move relative to the fixed panel 2. During the die casting process, the die casting machine drives the fixed mold core 22 and the moving mold core 23 to close together. During this process, the drive bar 18 moves the second slider 19 and the second core-pulling rod 20 inward. At the same time, the two third core-pulling rods 24 are attached to the top and bottom of the second core-pulling rod 20. Simultaneously, the core-pulling cylinder 11 is activated, driving the first core-pulling rod 13 to move to the inside of the lower cavity 25 and the upper cavity 34. Then, the molten metal enters through the sprue sleeve 36, passes through the runner, enters the inside of the horizontal runner 27, and flows into the inner runner 28. Inside the corresponding lower cavity 25 and upper cavity 34, the molten metal covers the outer sides of the second core-pulling rod 20, the third core-pulling rod 24, and the first core-pulling rod 13, and fills the inner sides of the lower cavity 25 and upper cavity 34 for molding. After molding, the core-pulling cylinder 11 is activated to pull the first core-pulling rod 13 away from the inside of the shock-absorbing cylinder body 1. At the same time, the die-casting machine moves the moving mold core 23 away from the fixed mold core 22. During this process, the third core-pulling rod 24 is gradually pulled away from the inside of the shock-absorbing cylinder body 1. At the same time, the drive bar 18 gradually pulls the second core-pulling rod 20 away from the inside of the shock-absorbing cylinder body 1. Meanwhile, the hydraulic cylinder or mechanical linkage structure on the die-casting machine moves the base plate 7 toward the direction closer to the fixed mold core 22, thereby ejecting the molded shock-absorbing cylinder body 1 from the inside of the lower cavity 25 through the ejector pin 9 to complete the demolding work.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A die-casting mold for a motorcycle shock absorber, characterized in that, The system includes a fixed module (4), a fixed mold core (22) fixed inside the fixed module (4), an upper cavity (34) inside the fixed mold core (22), a matching moving module (5) below the fixed module (4), a moving mold core (23) fixed inside the moving module (5), a lower cavity (25) matching the upper cavity (34) inside the moving mold core (23), mold feet (6) fixed on both sides of the bottom of the moving module (5), an ejector rod (8) between the mold feet (6) on both sides, a number of ejector pins (9) fixed on the top of the ejector rod (8), a number of base plates (7) fixed on the bottom of the ejector rod (8), and the ejector pins (9) are inserted into the moving module (5) and the moving mold core (23) and are slidably connected to the moving module (5) and the moving mold core (23); a first core-pulling mechanism and a second core-pulling mechanism are respectively provided on both sides of the moving module (5).

2. The motorcycle shock absorber die-casting mold according to claim 1, characterized in that, A sprue (35) is provided on the fixed mold core (22) between the upper cavities (34) on both sides. A sprue sleeve (36) is fixed on the fixed mold core (4) at the end of the sprue (35). A guide block (26) is fixed inside the moving mold core (23) below the sprue (35). A flow channel is provided on both sides of the guide block (26) near the lower cavity (25). A horizontal sprue (27) is provided on both sides of the top of the moving mold core (23) along the flow channel. Several ingates (28) are provided on the moving mold core (23) near the lower cavity (25) on the same side as the horizontal sprue (27). The sprue (35), the flow channel, the horizontal sprue (27), and the several ingates (28) are interconnected with the corresponding lower cavity (25).

3. The motorcycle shock absorber die-casting mold according to claim 2, characterized in that, The moving mold core (23) is provided with a plurality of first overflow grooves (29) on the side of the lower cavity (25) away from the horizontal runner (27), and the first overflow grooves (29) are connected to the internal space of the lower cavity (25) on the same side.

4. A motorcycle shock absorber die-casting mold according to claim 3, characterized in that, A third overflow groove (33) is provided on the inner side of the moving mold core (23) and the fixed mold core (22) and at the end of the lower cavity (25) near the guide block (26). A second overflow groove (31) is provided on the inner side of the moving mold core (23) and the fixed mold core (22) and at the end of the lower cavity (25) away from the guide block (26). The third overflow groove (33) and the second overflow groove (31) are both connected to the internal space of the corresponding lower cavity (25) and upper cavity (34).

5. A motorcycle shock absorber die-casting mold according to claim 4, characterized in that, The first overflow groove (29), the second overflow groove (31), the third overflow groove (33), the horizontal runner (27), the flow channel and the inner runner (28) are all provided with ejector pin holes that are adapted to the corresponding ejector pins (9), and a plurality of ejector pins (9) are respectively inserted into the corresponding ejector pin holes.

6. A motorcycle shock absorber die-casting mold according to claim 5, characterized in that, The first core-pulling mechanism includes drive slant rods (18) fixed on both sides of the inner side of the fixed module (4) near the end of the third overflow groove (33). The bottom of the drive slant rods (18) is inclined outward. The moving module (5) has slide rails (21) fixed inside both sides near the end of the drive slant rods (18). The inner side of the slide rails (21) is slidably connected to a second slider (19). The drive slant rods (18) are inserted into the inner side of the corresponding second slider (19) and slidably connected to it. (19) A second core-pulling rod (20) is fixed at one end near the corresponding lower cavity (25). The moving mold core (23) and the fixed mold core (22) have a second core-pulling cavity (32) on both sides of the end near the second core-pulling rod (20) that matches the second core-pulling rod (20). The second core-pulling rod (20) is inserted and slidably connected to the inner side of the corresponding second core-pulling cavity (32). The second core-pulling cavity (32) is connected to the inner space of the corresponding third overflow groove (33).

7. A motorcycle shock absorber die-casting mold according to claim 6, characterized in that, The second core-pulling mechanism includes a mounting bracket (10) fixed to the end of the moving module (5) away from the third overflow groove (33). A core-pulling cylinder (11) is installed at the end of the mounting bracket (10) away from the moving module (5). A first slider (12) is fixedly connected to the output end of the core-pulling cylinder (11). The first slider (12) is slidably connected to the inner side of the mounting bracket (10). A first core-pulling rod (13) is fixed on both sides of the first slider (12) near the lower cavity (25). The moving mold core (23) and the fixed mold core (22) have a first core-pulling cavity (30) on both sides of the inner side of the end near the first core-pulling rod (13) that is adapted to the first core-pulling rod (13). The first core-pulling rod (13) is inserted and slidably connected to the inner side of the corresponding first core-pulling cavity (30). The first core-pulling cavity (30) is connected to the inner space of the corresponding second overflow groove (31).

8. A motorcycle shock absorber die-casting mold according to claim 7, characterized in that, A positioning rod (14) is slidably connected to the top of the mounting bracket (10) and above the core-pulling cylinder (11). A connecting plate (15) is fixed to one end of the positioning rod (14) near the mounting bracket (10). The connecting plate (15) is fixedly sleeved on the output end of the core-pulling cylinder (11). A displacement control block (16) is fixed to the outside of the positioning rod (14). Limit switches (17) are installed on the top of the mounting bracket (10) and on both sides of the displacement control block (16).

9. A motorcycle shock absorber die-casting mold according to claim 8, characterized in that, The fixed mold core (22) and the moving mold core (23) are fixed with a third core-pulling rod (24) on the inner side of one end of the second core-pulling rod (20) respectively. When the fixed mold core (22) and the moving mold core (23) are closed, the opposite ends of the two third core-pulling rods (24) are attached to the outer surface of the second core-pulling rod (20), and the central axes of the two third core-pulling rods (24) are collinear and coincide with the central axis of the second core-pulling rod (20).

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