Aluminum alloy part die casting mold

Abstract

The application relates to the technical field of die-casting molds, and discloses an aluminum alloy part die-casting mold which comprises a lower mold, a female die is arranged in the inner side of the lower mold, an exhaust runner is arranged on the parting surface of the female die at the top of the lower mold, and a guide hole is vertically arranged in the lower mold and corresponds to the exhaust runner; an upper mold is arranged on the top of the lower mold and is driven to move up and down by external force, a male die is fixedly arranged on the bottom of the upper mold and corresponds to the female die, a cavity for forming an aluminum alloy casting is formed between the male die and the female die; a top rod is arranged in the inner side of the lower mold and slides along the axial direction of the guide hole, and the top rod is driven to rotate by external force. The aluminum alloy part die-casting mold can effectively solve the problem that the inner wall of the exhaust pipe is cleaned in the form of scraping, and the cleaning effect is reduced due to structural wear.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, and specifically to a die-casting mold for aluminum alloy parts. Background Technology

[0002] Aluminum alloy die casting is a highly efficient forming process that involves filling a mold cavity with liquid or semi-liquid aluminum alloy at high speed under high pressure, and then cooling and solidifying it under pressure to form a casting. The resulting aluminum alloy parts are widely used in industries such as aerospace and automotive. In the die casting of high-strength, lightweight aluminum alloy parts, to ensure the internal density of the casting and reduce defects such as porosity, the mold typically needs to be equipped with venting channels or venting plugs around the cavity to allow air to be expelled from the cavity during the filling process.

[0003] In related technologies, a common practice is to open venting channels on the parting surface or edge of the mold cavity, or to assemble replaceable venting plugs to lead out the gas through gaps. For example, the prior art patent with publication number CN117862463B provides a positioning ejection mold for aluminum alloy die casting. During the reset of the ejection mechanism, the device can scrape the inner wall of the venting pipe under the action of the ejection mechanism and the limiting mechanism, thereby preventing the aluminum alloy solution from stagnating in the inner cavity of the venting pipe and causing blockage. Furthermore, under the action of the transmission mechanism, the one-way mechanism and the rotation mechanism, the position of the ejection mechanism is changed during several lifting and scraping operations, thereby improving the cleaning effect of the venting pipe.

[0004] Although the existing technical solutions mentioned above can achieve the effect of scraping and cleaning the inner wall of the exhaust pipe during the lifting process by setting up the pop-out mechanism and the limiting mechanism, the scraping and cleaning process will cause friction with the inner wall of the exhaust pipe. Long-term use will easily lead to friction wear, resulting in insufficient cleaning of the inner wall of the exhaust pipe. If the wear problem is not detected in time, the exhaust port may be blocked at any time, resulting in insufficient exhaust and affecting the die-casting quality of aluminum alloy. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an aluminum alloy die-casting mold, which can effectively solve the problem that the cleaning effect is easily reduced due to structural wear when cleaning the inner wall of the exhaust pipe by scraping.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a die-casting mold for aluminum alloy parts, comprising: The lower mold has a concave mold on its inner side, and an exhaust channel is provided on the top of the lower mold corresponding to the parting surface of the concave mold. A guide hole is provided vertically inside the lower mold corresponding to the exhaust channel. An upper mold is set on top of a lower mold. A punch is provided at the bottom of the upper mold corresponding to the concave mold. In the closed state, a cavity for forming aluminum alloy castings is formed between the concave mold and the punch. The ejector pin is disposed on the inner side of the lower mold along the guide hole, and an exhaust channel is provided on the outer side of the ejector pin; the ejector pin can be driven to rotate within the guide hole, and the ejector pin can be driven to move vertically along the guide hole.

[0007] Furthermore, it also includes an ejector plate, which is disposed below the lower mold to drive the ejector rod to move; Among them, several exhaust channels are provided on the outer periphery of the aluminum alloy casting to form slag pockets during the die casting process; The push rod is provided with several exhaust channels. All push rods are rotatably set on the top of the ejector plate. In the non-ejected state, the top of the push rod is flush with the bottom of the corresponding exhaust channel.

[0008] Furthermore, the exhaust channel includes a longitudinal exhaust groove disposed at the upper end of the top rod; and The longitudinal exhaust groove is provided on the outer side of the top rod.

[0009] Furthermore, a support plate frame is fixedly provided at the bottom of the lower mold; Each of the top rods has a connecting ring slidably mounted on its outer side, and the connecting rings are all located at the top of the support plate frame; a pin is fixedly mounted at the top of the connecting ring corresponding to the exhaust seam, and the pin is located inside the exhaust seam.

[0010] Furthermore, each of the top rods has a cooling medium channel on its inner side for connecting to an external cooling system; The inner side of the upper mold is provided with a clamping member corresponding to the exhaust channel, and a first elastic member is fixedly provided at the top of the clamping member; The first elastic element is connected to a mounting plate on the side away from the clamping element, and the mounting plate is connected to the top of the upper mold.

[0011] Furthermore, a fixing frame is fixedly provided at the bottom of the ejector substrate, and a sealing joint is provided on the inner side of the fixing frame corresponding to the ejector rod. The ejector rods are all rotatably connected to the top of the corresponding sealing joint, and the other end of the sealing joint is connected to the external cooling system. A one-way inlet valve is fixedly installed inside the mounting plate corresponding to the cooling medium channel.

[0012] Furthermore, a force-bearing seat is fixedly provided at the bottom of the lower mold, and a striking component is provided inside the force-bearing seat. The striking component includes: The reciprocating slide plate is slidably set inside the force-bearing seat, and the reciprocating slide plate can move back and forth toward the force-bearing seat; The striking hammer is located on the outer side of both ends of the reciprocating slide plate.

[0013] Furthermore, a U-shaped support plate is provided on the top of the top substrate corresponding to the force-bearing seat, and the striking assembly also includes a turntable rotatably disposed on the top of the U-shaped support plate, and an eccentric shaft is fixedly disposed on the top of the turntable; The inner side of the reciprocating slide plate is provided with a sliding hole corresponding to the eccentric shaft. The length direction of the sliding hole is perpendicular to the sliding direction of the reciprocating slide plate, and the eccentric shaft is disposed in the corresponding sliding hole.

[0014] Furthermore, a drive sprocket is rotatably provided at the bottom of the ejector plate, and the drive sprocket drives the ejector rod to rotate through several driven sprockets; A centrifugal clutch is coaxially mounted on the top of the drive sprocket, and a toothed sleeve is connected to the outside of the centrifugal clutch; The turntable is mounted on the top of the U-shaped support plate via a vertical shaft. A gear is mounted on the outside of the vertical shaft, and the gear meshes with the outside of the gear sleeve.

[0015] Furthermore, the bottom of the die cavity is provided with an ejection assembly, the ejection assembly includes an ejection inverted cone, the bottom of the ejection inverted cone is connected to a top post, and the bottom of the top post is connected to a top block; A second elastic element is provided on the outer side of the top column between the lower mold and the top block, and the top block is driven to move upward by the U-shaped support plate.

[0016] The technical solution provided by this invention has the following advantages compared with the prior art: This invention uses a longitudinal exhaust channel as an exhaust structure. When the molten metal fills the cavity from bottom to top, the gas can be discharged through the exhaust channel. After the aluminum alloy casting is formed in the cavity, the ejector rod is driven to rotate inside the guide hole. The ejector rod, through the horizontal shearing force generated by the torsion, breaks off the part of the slag bag that has entered the guide hole from the bottom. By driving the ejector rod to move downward, the ejector rod moves the waste material inside the exhaust channel and between the ejector rod and the guide hole to the bottom of the mold until it is removed from the inside of the guide hole. This allows the waste material inside the exhaust channel and outside the ejector rod to automatically detach, preventing wear and tear on the structure caused by continuous rotation and friction, which would affect the cleaning effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the lower mold and the upper mold according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the lower mold and the upper mold according to an embodiment of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 for Figure 3 Enlarged structural diagram at point B; Figure 6 for Figure 3 Enlarged structural diagram at point C Figure 7 This is an exploded structural diagram of the mold according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the bottom structure of the mold in an embodiment of the present invention; Figure 9 This is an exploded structural diagram of the mold in an embodiment of the present invention; Figure 10 This is a schematic diagram of the assembly structure of the striking component and the U-shaped support plate according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the exploded structure of the striking component according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the bottom structure of the ejector substrate according to an embodiment of the present invention.

[0019] The labels in the diagram represent: 100, aluminum alloy casting; 101, slag bag; 1. Lower mold; 11. Cavity mold; 12. Venting channel; 13. Guide hole; 14. Limiting rod; 15. First mounting block; 16. Support plate frame; 17. Limiting post; 18. Force bearing seat; 19. Inverted conical hole; 2. Upper mold; 21. Punch; 22. Mounting hole; 23. Second mounting block; 24. Injection joint; 25. Angled surface; 3. Push rod; 31. Longitudinal exhaust groove; 32. Exhaust slot; 33. Driven sprocket; 34. Connecting ring; 35. Push pin; 36. Cooling medium channel; 37. First mating surface; 4. Ejector base plate; 41. Drive sprocket; 42. Chain; 43. Gearbox; 44. Motor; 45. Centrifugal clutch; 46. Gear sleeve; 47. U-shaped support plate; 48. Slide rod; 49. Fixing frame; 410. Sealing joint; 411. Housing; 412. Hydraulic cylinder; 5. Clamping element; 51. First elastic element; 52. Mounting plate; 53. One-way liquid inlet valve; 54. Second mating surface; 55. Conical sleeve; 56. Frustum; 6. Striking assembly; 61. Reciprocating slide; 62. Elastic hammer; 63. Turntable; 64. Eccentric shaft; 65. Sliding hole; 66. Vertical shaft; 67. Gear; 7. Ejector assembly; 71. Ejector inverted cone; 72. Ejector column; 73. Ejector block; 74. Second elastic element. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Please see Figures 1-12 This invention provides a technical solution: a die-casting mold for aluminum alloy parts, such as... Figure 1 , Figure 2 and Figure 3 As shown, the mold includes a lower mold 1, an upper mold 2, and an ejector pin 3. A cavity 11 is provided on the inner side of the lower mold 1. An exhaust channel 12 is provided on the top of the lower mold 1 corresponding to the parting surface of the cavity 11. A guide hole 13 is vertically provided inside the lower mold 1 corresponding to the exhaust channel 12. The upper mold 2 is driven to move up and down and is located on the top of the lower mold 1 by external force. A punch 21 is fixedly provided at the bottom of the upper mold 2 corresponding to the cavity 11. A cavity for forming the aluminum alloy casting 100 is formed between the punch 21 and the cavity 11. The ejector pin 3 is slidably provided on the inner side of the lower mold 1 along the axial direction of the guide hole 13. The ejector pin 3 is driven to rotate by external force. An exhaust channel is provided on the outer side of the ejector pin 3. The exhaust channel includes a longitudinal exhaust groove 31 opened on the outer side of the upper end of the ejector pin 3 and an exhaust slit 32 opened on the bottom of the longitudinal exhaust groove 31 on the outer side of the ejector pin 3. The ejector pin 3 is driven to move up and down inside the guide hole 13 by external force to clean the inner wall of the guide hole 13 and trigger the auxiliary ejection action of the aluminum alloy casting 100.

[0023] Specifically, limit rods 14 are fixedly installed at the four corners of the lower mold 1 for sliding installation of the upper mold 2; first mounting blocks 15 are fixedly installed on both sides of the lower mold 1 for installing the lower mold 1 on the production station of the die casting equipment; second mounting blocks 23 are fixedly installed on the outside of the upper mold 2 for installing the upper mold 2 on the drive end of the die casting equipment; and an injection joint 24 is fixedly installed on the top of the upper mold 2 for injecting molten aluminum alloy into the cavity.

[0024] By setting the drive end of the die casting equipment to control the upper mold 2 to move downward along the limit rod 14, the upper mold 2 and the lower mold 1 are closed. At this time, the punch 21 at the bottom of the upper mold 2 cooperates with the concave mold 11 on the inner side of the lower mold 1 to form a cavity. When the aluminum alloy melt is injected into the cavity through the injection joint 24, the molten metal will fill the cavity from bottom to top. The gas inside is forced into the venting channel 12 on the outside of the parting surface and enters the venting slot 32 through the longitudinal venting groove 31 on the outside of the ejector rod 3 to be discharged outward. The overflowing molten metal will enter the venting channel 12 to form a slag bag 101.

[0025] To ensure exhaust performance, such as Figure 3 and Figure 4 As shown, the top opening of the longitudinal venting groove 31 is larger than the bottom opening (contracting downwards), which may cause some molten metal to enter the inner side of the longitudinal venting groove 31 and between the guide hole 13 and the ejector rod 3. After the aluminum alloy casting 100 is formed in the cavity, the ejector rod 3 is driven to rotate inside the guide hole 13, so that the ejector rod 3, through the horizontal shearing force generated by the torsion, breaks off the part of the slag bag 101 that has entered the guide hole 13. At this time, the broken scrap is located inside the longitudinal venting groove 31. Then, by driving the ejector rod 3 to move downwards, the ejector rod 3 drives the scrap inside the longitudinal venting groove 31 and between the ejector rod 3 and the guide hole 13 to move to the bottom of the mold 1 until it is removed from the interior of the guide hole 13, so that the scrap inside the longitudinal venting groove 31 and outside the ejector rod 3 automatically detaches.

[0026] Subsequently, the push rod 3 is moved upward and pushes the slag bag 101. By using the slag bag 101 as the push position when the aluminum alloy casting 100 is demolded, it is convenient for the aluminum alloy casting 100 to be demolded and removed from the inside of the cavity mold 11. Finally, the push rod 3 is moved downward to the venting position to carry out the next die casting operation. Then, the waste material entering the longitudinal venting groove 31 is separated by shearing force. Then, the waste material is driven out of the guide hole 13 by axial movement to prevent the structure from being worn due to continuous rotation and scraping, which would affect the cleaning effect.

[0027] To ensure sufficient exhaust of gas from the mold cavity, multiple venting structures are typically installed around the parting surface; furthermore, as... Figure 1 As shown, it also includes an ejector plate 4 that is driven to move up and down by external force, used to drive the ejector rods 3 to move up and down; several exhaust channels 12 are opened on the outer periphery of the aluminum alloy casting 100, used to form slag pockets 101 during the die casting process; several ejector rods 3 are provided corresponding to the exhaust channels 12, and several ejector rods 3 are rotatably set on the top of the ejector plate 4, with the top of the ejector rods 3 flush with the bottom of the exhaust channels 12. Specifically, a housing 411 is fixedly installed on the outside of the ejector plate 4, and a hydraulic cylinder 412 is fixedly installed on the outside of the housing 411, with the driving end of the hydraulic cylinder 412 fixedly connected to the support plate frame 16.

[0028] The gas inside each exhaust channel 12 is discharged through the longitudinal exhaust grooves 31 on the outer side of several ejector rods 3, ensuring sufficient and smooth exhaust. The slag pockets 101 formed by the multiple exhaust channels 12 can serve as multiple push positions, making the force on the outer periphery of the aluminum alloy casting 100 more uniform when assisting in demolding. When it is necessary to drive the ejector rods 3 to move up and down, the hydraulic cylinder 412 drives the support plate frame 16, and the reaction force drives the ejector plate 4 to move up and down relative to the support plate frame 16. The ejector plate 4 simultaneously drives several ejector rods 3 to move up and down inside the guide hole 13, ensuring the synchronicity of the movement of each ejector rod 3.

[0029] To achieve the rotation of the drive rod 3, as follows: Figure 12 As shown, driven sprockets 33 are fixedly installed at the bottom of the push rod 3, and a drive sprocket 41 is rotatably installed at the bottom of the ejector plate 4. The drive sprocket 41 and several driven sprockets 33 are linked together by a chain 42. The drive sprocket 41 is driven to rotate at the bottom of the ejector plate 4 by an external force. Specifically, a gearbox 43 is fixedly installed at the bottom of the ejector plate 4. The drive end of the gearbox 43 is coaxially connected to the drive sprocket 41, and a motor 44 is fixedly installed on the outside of the gearbox 43.

[0030] When cleaning up waste, the starting motor 44 drives the drive sprocket 41 of the gearbox 43 to rotate at the bottom of the ejector plate 4. The drive sprocket 41 drives several driven sprockets 33 to rotate synchronously through the chain 42. The driven sprockets 33 drive the corresponding push rods 3 to rotate inside the guide hole 13. It should be noted that the chain 42 can accommodate the linkage of driven sprockets 33 at different positions on the same horizontal plane, and has sufficient strength to drive the push rods 3 to rotate inside the guide hole 13. At the same time, the push rods 3 have sufficient strength and power to shear the waste through rotation.

[0031] To ensure the smooth discharge of waste material from the outer side of the push rod 3 and the inner side of the longitudinal venting groove 31, such as... Figure 10 and Figure 11 As shown, a support plate frame 16 is fixedly installed at the bottom of the lower mold 1. Limiting posts 17 are fixedly installed at the four corners of the support plate frame 16. The limiting posts 17 are slidably installed on the inner side of the ejector plate 4. Connecting rings 34 are slidably installed on the outer side of the ejector rods 3. Ejector pins 35 are fixedly installed on the top of the connecting rings 34 corresponding to the venting seams 32. The ejector pins 35 are located on the inner side of the venting seams 32, and their outer circumference is smaller than the inner circumference of the venting seams 32. The connecting rings 34 are all located on the top of the support plate frame 16.

[0032] When the ejector plate 4 moves the ejector rod 3 up and down, it slides along the outside of the limit post 17 to ensure the alignment accuracy between the ejector rod 3 and the guide hole 13. As the ejector rod 3 gradually moves down, the bottom of the longitudinal exhaust groove 31 gradually approaches the top of the ejector pin 35. Finally, the ejector pin 35 ejects the waste material inside the longitudinal exhaust groove 31 or exhaust slot 32. At this time, the longitudinal exhaust groove 31 is located outside the guide hole 13. The ejected waste material is not restricted by the inner wall of the guide hole 13 and can fall off by itself, preventing insufficient discharge of waste material inside the longitudinal exhaust groove 31, which would affect the subsequent exhaust work.

[0033] To prevent the ejector pin 3 from changing its assembly clearance with the guide hole 13 due to thermal deformation during die casting (such as jamming), specifically, as follows: Figure 3 , Figure 4 , Figure 5 and Figure 9 As shown, cooling medium channels 36 are provided on the inner side of the push rod 3 for connecting to an external cooling system; mounting holes 22 for accommodating the clamping member 5 are provided on the inner side of the upper mold 2 corresponding to the exhaust channel 12; a first elastic member 51 is fixedly provided on the top of the clamping member 5. In this embodiment, the first elastic member 51 is a spring. A mounting plate 52 is fixedly provided on the top of the first elastic member 51 and is fixedly provided on the top of the upper mold 2. A frustum 56 is fixedly provided on the bottom of the clamping member 5 corresponding to the exhaust channel 12; a slope 25 is provided on the inner side of the bottom of the mounting hole 22. The frustum 56 and the slope 25 are adapted to each other. The clamping member 5 is ejected from the bottom of the mounting hole 22 by the action of the first elastic member 51.

[0034] By setting a cooling medium channel 36 inside the ejector rod 3, it is convenient to connect the ejector rod 3 to the cooling system for real-time cooling, so as to prevent the ejector rod 3 from deforming due to heat and getting stuck in the guide hole 13. In addition, to prevent the slag bag 101 from putting too much pressure on the top of the ejector rod 3 under the pressure of the lower mold 1 and the upper mold 2, which would cause the ejector rod 3 to be overloaded or even stuck, after the aluminum alloy casting 100 is formed, the upper mold 2 is driven upward by the die-casting equipment to move a certain distance, so that the upper mold 2 drives the punch 21 away from the formed aluminum alloy casting 100. At this time, the clamping part 5 inside the mounting hole 22 extends out of the bottom of the upper mold 2 under the action of the first elastic part 51 and applies a certain pressure to the slag bag 101. Then, the ejector rod 3 is driven to rotate to shear the scrap. At this time, the slag bag 101 will shake slightly when the ejector rod 3 rotates, and the clamping part 5 will press down to ensure the integrity of the slag bag 101, preventing the slag bag 101 from being torn and damaged by the ejector rod 3 when shearing the scrap.

[0035] To enable the connection of push rod 3 to the cooling system, again... Figure 3 , Figure 4 and Figure 5As shown, a fixing frame 49 is fixedly installed at the bottom of the ejector base plate 4. A sealing joint 410 is fixedly installed on the inner side of the fixing frame 49 corresponding to the ejector rod 3. The sealing joint 410 is rotatably connected to the ejector rod 3. The other end of the sealing joint 410 is connected to an external liquid supply device. A first adapter surface 37 is opened on the top of the ejector rod 3 corresponding to the cooling medium channel 36. The first adapter surface 37 is inverted conical. A one-way liquid inlet valve 53 is fixedly installed on the inner side of the mounting plate 52 corresponding to the cooling medium channel 36. The bottom end of the one-way liquid inlet valve 53 cooperates with the first adapter surface 37. A second adapter surface 54 is provided on the inner side of the clamping member 5. The second adapter surface 54 is inverted conical. A cone sleeve 55 is fixedly installed on the outer side of the one-way liquid inlet valve 53 corresponding to the second adapter surface 54. When the one-way liquid inlet valve 53 is sealed with the first adapter surface 37, the truncated pyramid 56 and the inclined surface 25 and the second adapter surface 54 and the cone sleeve 55 are sealed simultaneously.

[0036] When the upper mold 2 moves downward to the closed state, the clamping member 5 compresses the first elastic member 51 under the pressure of the upper mold 2, and the truncated pyramid 56 at the bottom of the clamping member 5 presses against the bottom of the exhaust channel 12. At the same time, the truncated pyramid 56 and the inclined surface 25 cooperate to ensure the sealing of the outer side of the clamping member 5. Furthermore, the second mating surface 54 on the inner side of the clamping member 5 cooperates with the tapered sleeve 55 on the outer side of the one-way inlet valve 53 to ensure the sealing between the one-way inlet valve 53 and the clamping member 5. Simultaneously, the upper mold 2 drives the bottom end of the one-way inlet valve 53 to contact the top of the cooling medium channel 36. The first mating surface 37 is engaged to ensure the sealing between the cooling medium channel 36 and the one-way inlet valve 53. Then, coolant is supplied to the inside of the sealing joint 410 through the external liquid supply device. The coolant enters the one-way inlet valve 53 through the cooling medium channel 36 inside the ejector rod 3 and flows back into the cooling system, achieving the effect of circulating cooling. When the upper mold 2 drives the one-way inlet valve 53 away from the top of the lower mold 1, the one-way inlet valve 53 and the cooling medium channel 36 are separated. At this time, the coolant inside the one-way inlet valve 53 will not flow downward, so as to facilitate continuous mold opening and closing actions.

[0037] Based on the above embodiments, in order to make the aluminum alloy casting 100 more stable during demolding and blanking, such as Figure 7 and Figure 10 As shown, it also includes a striking assembly 6 disposed on the top of the ejector plate 4. The striking assembly 6 includes a set of reciprocating slide plates 61. Elastic hammers 62 are fixedly disposed on the outer sides of both ends of the reciprocating slide plates 61. The reciprocating slide plates 61 are driven to move back and forth by external force to trigger the striking action of the elastic hammers 62. When the drive sprocket 41 rotates at high speed, it drives the reciprocating slide plates 61 to move back and forth. A force-bearing seat 18 is fixedly disposed at the bottom of the lower mold 1 corresponding to the elastic hammers 62.

[0038] Specifically, such as Figure 7 , Figure 9 and Figure 10As shown, a U-shaped support plate 47 is fixedly installed on the top of the ejector base plate 4 corresponding to the inner side of the force-bearing seat 18. The striking assembly 6 also includes a turntable 63 rotatably installed on the top of the U-shaped support plate 47. An eccentric shaft 64 is fixedly installed on the top of the turntable 63. A sliding hole 65 is opened on the inner side of the reciprocating slide plate 61 corresponding to the eccentric shaft 64. The length direction of the sliding hole 65 is perpendicular to the moving direction of the reciprocating slide plate 61. Both ends of the reciprocating slide plate 61 are slidably installed on the outer side of the slide rod 48. The slide rod 48 is fixedly installed on the outer side of the U-shaped support plate 47. A centrifugal clutch 45 is coaxially installed on the top of the drive sprocket 41. A gear sleeve 46 is fixedly installed on the outer side of the centrifugal clutch 45. The turntable 63 is rotatably installed on the top of the U-shaped support plate 47 via the vertical shaft 66. A gear 67 is fixedly installed on the outer side of the vertical shaft 66. The gear 67 is meshed on the outer side of the gear sleeve 46.

[0039] When the push rod 3 rotates, the drive sprocket 41 rotates at low speed, allowing the drive sprocket 41 to rotate independently. At this time, the striking assembly 6 is stationary, allowing for independent venting and waste removal before demolding. After the waste is removed and the push rod 3 is reset inside the guide hole 13, the drive sprocket 41 rotates at high speed, causing the drive sprocket 41 to drive the driven part of the centrifugal clutch 45 to rotate. This, in turn, drives the outer gear 67 to rotate through the gear sleeve 46 on the outside of the centrifugal clutch 45. The gear 67 then drives the vertical shaft 66 to rotate synchronously, and the rotation of the vertical shaft 66 causes the turntable 63 and the top eccentric shaft 64 to rotate together. Since the length direction of the sliding hole 65 on the inner side of the reciprocating slide plate 61 is perpendicular to the moving direction of the reciprocating slide plate 61, the eccentric shaft 64 will generate a horizontal thrust on the reciprocating slide plate 61 when it slides in the sliding hole 65, causing the reciprocating slide plate 61 to make reciprocating linear motion along the outer side of the slide rod 48. As the reciprocating slide plate 61 moves back and forth, the elastic hammers 62 on both sides of its outer side will continuously strike the force seat 18 at the bottom of the lower mold 1 periodically. The vibration generated by this striking can effectively reduce the adhesion between the aluminum alloy casting 100 and the inner wall of the mold cavity, avoid workpiece deformation or jamming caused by uneven demolding resistance, and at the same time, the vibration can also cause the residual small waste to fall off, further improving the smoothness and stability of the demolding process, and ensuring that the aluminum alloy casting 100 maintains good structural integrity after leaving the mold. It should be noted that the waste material between the push rod 3 and the guide hole 13 has been cleared at this time, so that when the push rod 3 rotates at a relatively high speed, it will not experience external wear against the inner wall of the guide hole 13. The centrifugal clutch 45 includes a driving component coaxially connected to the driving sprocket 41, a centrifugal body located outside the driving component, and a driven component located outside the centrifugal body. For the sake of existing technology, these details will not be elaborated here.

[0040] To ensure a more even force distribution during the ejection of the aluminum alloy casting 100, such as Figure 3 and Figure 6As shown, it also includes an ejection assembly 7 disposed at the bottom of the die 11. The ejection assembly 7 includes an ejection inverted cone 71, a top post 72 fixedly disposed at the bottom of the ejection inverted cone 71, and a top block 73 fixedly disposed at the bottom of the top post 72. An inverted cone hole 19 is opened at the bottom of the die 11, and the ejection inverted cone 71 is correspondingly disposed on the inner side of the inverted cone hole 19. A second elastic element 74 is disposed on the outer side of the top post 72 between the lower die 1 and the top block 73. In this embodiment, the second elastic element 74 is a spring element. The top block 73 is driven by the U-shaped support plate 47 to move upward and trigger the ejection action.

[0041] After the striking component 6 at the top of the U-shaped support plate 47 knocks and demolds the lower mold 1, the ejector plate 4 continues to move upward, causing the ejector plate 4 to push the U-shaped support plate 47 closer to the top block 73 until the top block 73 compresses the second elastic member 74, causing the top column 72 to push the ejector inverted cone 71 away from the inside of the inverted cone hole 19. At this time, the ejector inverted cone 71 pushes the aluminum alloy casting 100 inside the cavity 11 upward. By adding bottom thrust and the thrust applied to the outer periphery of the aluminum alloy casting 100 by the ejector rod 3, the local and outer sides of the aluminum alloy casting 100 are pushed out simultaneously, ensuring the stability of the ejection and unloading.

[0042] In summary, when using the aluminum alloy die-casting mold described in this application embodiment, firstly, the upper mold 2 is controlled to move downward along the limit rod 14 by setting the drive end of the die-casting equipment, thereby realizing the mold closing action of the upper mold 2 and the lower mold 1. At this time, the punch 21 at the bottom of the upper mold 2 cooperates with the concave mold 11 on the inner side of the lower mold 1 to form a cavity; and, under the pressure of the upper mold 2, the clamping member 5 compresses the first elastic member 51, so that the truncated pyramid 56 at the bottom of the clamping member 5 is pressed against the bottom of the exhaust channel 12. At the same time, the truncated pyramid 56 and the inclined surface 25 cooperate with each other to ensure the sealing of the outer side of the clamping member 5; the second mating surface 54 on the inner side of the clamping member 5 and the single The tapered sleeve 55 on the outside of the liquid inlet valve 53 cooperates with each other to ensure the sealing between the one-way liquid inlet valve 53 and the clamping part 5. At the same time, the upper mold 2 drives the bottom end of the one-way liquid inlet valve 53 to cooperate with the first mating surface 37 on the top of the cooling medium channel 36 to ensure the sealing between the cooling medium channel 36 and the one-way liquid inlet valve 53. Then, coolant is supplied to the inside of the sealing joint 410 through the external liquid supply equipment. The coolant enters the interior of the one-way liquid inlet valve 53 through the cooling medium channel 36 inside the push rod 3 and flows back to the cooling system, realizing the effect of circulating cooling to prevent the push rod 3 from deforming due to heat and the guide hole 13 from getting stuck.

[0043] Then, the molten aluminum alloy is injected into the cavity through the injection joint 24. The molten metal fills the cavity from bottom to top, and the gas inside is forced into the venting channel 12 on the outside of the parting surface. It then enters the venting slot 32 through the longitudinal venting groove 31 on the outside of the ejector rod 3 and is discharged outward. The overflowing molten metal enters the venting channel 12 to form a slag bag 101. In order to ensure the venting effect, the top opening of the longitudinal venting groove 31 is larger than the bottom opening, which may cause some molten metal to enter the inner side of the longitudinal venting groove 31 and between the guide hole 13 and the ejector rod 3.

[0044] After the aluminum alloy casting 100 is formed in the cavity, the upper mold 2 is moved upward a certain distance by the drive end of the die casting equipment, so that the upper mold 2 moves the punch 21 away from the formed aluminum alloy casting 100. At this time, the clamping part 5 inside the mounting hole 22 extends out of the bottom of the upper mold 2 under the action of the first elastic part 51, and applies a certain pressure to the slag bag 101 to prevent the slag bag 101 from causing too much pressure on the top of the ejector rod 3 under the pressure of the lower mold 1 and the upper mold 2, so as to cause the ejector rod 3 to have a large load or even jam. Then, the starting motor 44 drives the drive sprocket 41 of the gearbox 43 to rotate at the bottom of the ejector plate 4, so that the drive sprocket 41 drives several driven sprockets 33 to rotate synchronously through the chain 42. The driven sprockets 33 drive the corresponding ejector rod 3 to rotate inside the guide hole 13. The ejector rod 3 disconnects the part of the bottom of the slag bag 101 that enters the guide hole 13 by the horizontal shearing force generated by the torsion.

[0045] At this point, the disconnected waste material is located inside the longitudinal venting groove 31. Then, the hydraulic cylinder 412 drives the support plate frame 16, and the reaction force drives the ejector plate 4 to rise and fall relative to the support plate frame 16. The ejector plate 4 simultaneously drives several ejector rods 3 to move downward inside the guide hole 13. The ejector rods 3 drive the waste material inside the longitudinal venting groove 31 and between the ejector rods 3 and the guide hole 13 to move to the bottom of the mold 1 until it is removed from the inside of the guide hole 13. During the movement, the bottom of the longitudinal venting groove 31 gradually approaches the top of the ejector pin 35. Finally, the ejector pin 35 ejects the waste material inside the longitudinal venting groove 31 or the venting slot 32. At this time, the longitudinal venting groove 31 is located outside the guide hole 13. The ejected waste material is not restricted by the inner wall of the guide hole 13 and can fall down by itself, preventing insufficient discharge of waste material inside the longitudinal venting groove 31, which would affect the subsequent venting work.

[0046] After the waste is cleaned up, the push rod 3 is driven upward to the exhaust position, and the drive sprocket 41 is driven to rotate at high speed. The drive sprocket 41 drives the driven part of the centrifugal clutch 45 to rotate, which in turn drives the outer gear 67 to rotate through the gear sleeve 46 on the outside of the centrifugal clutch 45. The gear 67 drives the vertical shaft 66 to rotate synchronously. The rotation of the vertical shaft 66 drives the turntable 63 and the eccentric shaft 64 at the top to rotate together. Since the length direction of the sliding hole 65 on the inner side of the reciprocating slide plate 61 is perpendicular to the moving direction of the reciprocating slide plate 61, the eccentric shaft 64 will exert a horizontal force on the reciprocating slide plate 61 when it slides in the sliding hole 65. The thrust in the direction causes the reciprocating slide plate 61 to reciprocate linearly along the outer side of the slide bar 48. As the reciprocating slide plate 61 moves back and forth, the elastic hammers 62 on both sides of its outer side continuously strike the force seat 18 at the bottom of the lower mold 1 periodically. The vibration generated by this striking can effectively reduce the adhesion between the aluminum alloy casting 100 and the inner wall of the mold cavity, avoid workpiece deformation or jamming caused by uneven demolding resistance, and at the same time, the vibration can also cause residual small waste materials to fall off, further improving the smoothness and stability of the demolding process, and ensuring that the aluminum alloy casting 100 maintains good structural integrity after leaving the mold.

[0047] After the striking component 6 at the top of the U-shaped support plate 47 knocks and demolds the lower mold 1, the ejector plate 4 continues to move upward, causing the ejector plate 4 to push the U-shaped support plate 47 closer to the top block 73 until the top block 73 compresses the second elastic member 74, causing the top column 72 to push the ejector inverted cone 71 away from the inside of the inverted cone hole 19. At this time, the ejector inverted cone 71 pushes the aluminum alloy casting 100 inside the cavity 11 upward. By adding bottom thrust and the thrust applied to the outer periphery of the aluminum alloy casting 100 by the ejector rod 3, the part and the outer side of the aluminum alloy casting 100 are pushed out simultaneously.

[0048] It is worth noting that, compared with the prior art, the aluminum alloy die-casting mold described in this application embodiment has the following advantages: Through multi-directional sealing design, including the fit between the truncated pyramid 56 at the bottom of the clamping member 5 and the bottom of the exhaust channel 12, the fit between the truncated pyramid 56 and the inclined surface 25, and the fit between the second fitting surface 54 and the conical sleeve 55, the sealing performance of the cavity and related components is effectively guaranteed, preventing leakage of molten aluminum alloy, and ensuring the stability of the die casting process and the quality of the castings.

[0049] The circulating cooling system provides coolant to the sealing joint 410 via an external liquid supply device and allows it to flow back through the cooling medium channel 36 into the one-way inlet valve 53. This system can promptly remove the heat generated by the ejector rod 3, preventing the ejector rod 3 from deforming due to heat and jamming with the guide hole 13. This extends the service life of the mold components and ensures the continuity of the die casting operation.

[0050] By setting the longitudinal venting groove 31 and venting slit 32 as venting structures, when the molten metal fills the cavity from bottom to top, the gas can be discharged through the longitudinal venting groove 31 into the venting slit 32. The top opening of the longitudinal venting groove 31 is larger than the bottom opening, which not only ensures the venting effect, but also facilitates the subsequent processing of the molten metal entering the inner side of the longitudinal venting groove 31 and between the guide hole 13 and the push rod 3, reducing the generation of defects such as porosity.

[0051] The waste removal mechanism is highly efficient. By driving the active sprocket 41 to rotate, it drives the driven sprocket 33 to rotate the ejector rod 3, generating shearing force to break the waste. Then, the hydraulic cylinder 412 drives the support plate frame 16 to make the ejector plate 4 move down, which in turn moves the ejector rod 3 down. Combined with the ejector pin 35, the waste is ejected, which effectively avoids the impact of waste residue on subsequent venting work and improves the automated cleaning capability of the mold.

[0052] The vibration design during demolding utilizes the high-speed rotation of the drive sprocket 41 to drive components such as the centrifugal clutch 45, gear sleeve 46, gear 67, and vertical shaft 66, causing the eccentric shaft 64 to slide within the sliding hole 65, driving the reciprocating slide plate 61 to reciprocate. Vibration is generated by the elastic hammer 62 striking the force seat 18, reducing the adhesion between the aluminum alloy casting 100 and the inner wall of the cavity, preventing workpiece deformation or jamming, and simultaneously promoting the shedding of small scrap materials, ensuring the smoothness of the demolding process and the structural integrity of the casting.

[0053] The application of the dual ejection mechanism allows the aluminum alloy casting 100 to be ejected after the hammering component 6 knocks the mold. The ejection base plate 4 pushes the U-shaped support plate 47 to compress the second elastic element 74 by the ejector block 73. This, in turn, allows the ejector column 72 to push the ejector inverted cone 71 to eject the aluminum alloy casting 100. Combined with the pushing force of the ejector rod 3 on the outer periphery of the aluminum alloy casting 100, the simultaneous local and outer pushing is achieved, ensuring that the aluminum alloy casting 100 can be smoothly removed from the mold, thus improving the demolding efficiency and success rate.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A die-casting mold for aluminum alloy parts, characterized in that, include: The lower mold has a concave mold on its inner side, and an exhaust channel is provided on the top of the lower mold corresponding to the parting surface of the concave mold. A guide hole is provided vertically inside the lower mold corresponding to the exhaust channel. An upper mold is set on top of a lower mold. A punch is provided at the bottom of the upper mold corresponding to the concave mold. In the closed state, a cavity for forming aluminum alloy castings is formed between the concave mold and the punch. The ejector pin is disposed on the inner side of the lower mold along the guide hole, and an exhaust channel is provided on the outer side of the ejector pin; the ejector pin can be driven to rotate within the guide hole, and the ejector pin can be driven to move vertically along the guide hole.

2. The die-casting mold for aluminum alloy parts according to claim 1, characterized in that, It also includes an ejector plate, which is disposed below the lower mold to drive the ejector rod to move; Among them, several exhaust channels are provided on the outer periphery of the aluminum alloy casting to form slag pockets during the die casting process; The push rod is provided with several exhaust channels. All push rods are rotatably set on the top of the ejector plate. In the non-ejected state, the top of the push rod is flush with the bottom of the corresponding exhaust channel.

3. The die-casting mold for aluminum alloy parts according to claim 1, characterized in that, The exhaust channel includes a longitudinal exhaust groove disposed at the upper end of the top rod; and The longitudinal exhaust groove is provided on the outer side of the top rod.

4. The die-casting mold for aluminum alloy parts according to claim 3, characterized in that, A support frame is fixedly installed at the bottom of the lower mold; Each of the top rods has a connecting ring slidably mounted on its outer side, and the connecting rings are all located at the top of the support plate frame; a pin is fixedly mounted at the top of the connecting ring corresponding to the exhaust seam, and the pin is located inside the exhaust seam.

5. The die-casting mold for aluminum alloy parts according to claim 2, characterized in that, The inner side of each top rod is provided with a cooling medium channel for connecting to an external cooling system; The inner side of the upper mold is provided with a clamping member corresponding to the exhaust channel, and a first elastic member is fixedly provided at the top of the clamping member; The first elastic element is connected to a mounting plate on the side away from the clamping element, and the mounting plate is connected to the top of the upper mold.

6. The die-casting mold for aluminum alloy parts according to claim 5, characterized in that, A fixing frame is fixedly installed at the bottom of the ejector substrate. A sealing joint is provided on the inner side of the fixing frame corresponding to the ejector rod. The ejector rod is rotatably connected to the top of the corresponding sealing joint. The other end of the sealing joint is connected to the external cooling system. A one-way inlet valve is fixedly installed inside the mounting plate corresponding to the cooling medium channel.

7. The die-casting mold for aluminum alloy parts according to claim 2, characterized in that, A force-bearing seat is fixedly provided at the bottom of the lower mold, and a striking component is provided inside the force-bearing seat. The striking component includes: The reciprocating slide plate is slidably set inside the force-bearing seat, and the reciprocating slide plate can move back and forth toward the force-bearing seat; The striking hammer is located on the outer side of both ends of the reciprocating slide plate.

8. The die-casting mold for aluminum alloy parts according to claim 7, characterized in that, A U-shaped support plate is provided on the top of the top substrate corresponding to the force-bearing seat. The striking assembly also includes a turntable rotatably disposed on the top of the U-shaped support plate, and an eccentric shaft is fixedly disposed on the top of the turntable. The inner side of the reciprocating slide plate is provided with a sliding hole corresponding to the eccentric shaft. The length direction of the sliding hole is perpendicular to the sliding direction of the reciprocating slide plate, and the eccentric shaft is disposed in the corresponding sliding hole.

9. The die-casting mold for aluminum alloy parts according to claim 8, characterized in that, The bottom of the ejector plate is rotatably equipped with a drive sprocket, which drives the ejector rod to rotate through several driven sprockets; A centrifugal clutch is coaxially mounted on the top of the drive sprocket, and a toothed sleeve is connected to the outside of the centrifugal clutch; The turntable is mounted on the top of the U-shaped support plate via a vertical shaft. A gear is mounted on the outside of the vertical shaft, and the gear meshes with the outside of the gear sleeve.

10. The die-casting mold for aluminum alloy parts according to claim 8, characterized in that, The bottom of the die cavity is provided with an ejection assembly, the ejection assembly includes an ejection inverted cone, the bottom of the ejection inverted cone is connected to a top post, and the bottom of the top post is connected to a top block; A second elastic element is provided on the outer side of the top column between the lower mold and the top block, and the top block is driven to move upward by the U-shaped support plate.

Images