Metal powder injection molding device and method

Abstract

The invention provides a metal powder injection molding device and method, and belongs to the technical field of metal powder injection molding devices. The first supporting block is fixedly connected to the top of the machine box, the top of the machine box is fixedly connected with a second supporting block, the second supporting block is located on one side of the first supporting block, and a hollow die sleeve is arranged between the first supporting block and the second supporting block; the multiple mold frames are arranged between the first supporting block and the second supporting block, in the daily maintenance process of the mold, the multiple mold frames are used for containing the multiple forming mold blocks, the multiple screw sleeves are used for containing the multiple bolts, the multiple forming mold blocks are spliced to form a mold cavity, and the mold cavity is used for molding metal powder; the adjusting mechanism is connected with the multiple mold frames and used for moving the multiple forming modules, the forming mold is disassembled, the size and weight of the disassembled single forming mold are reduced, and then the daily maintenance difficulty of the forming mold is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of metal powder injection molding apparatus, specifically relating to a metal powder injection molding apparatus and method. Background Technology

[0002] Metal powder is a finely granulated or powdered substance made from metals or alloys through specific processes. This powder can be composed of one or more metallic elements, such as iron, copper, aluminum, zinc, and titanium, or it can be an alloy of these metals. There are various methods for its preparation, including mechanical crushing, physicochemical methods, and electrolysis.

[0003] Injection molding is an important step in the die casting process. It involves injecting molten metal into a mold cavity under high pressure and then cooling and solidifying it under pressure to form a part or assembly of the desired shape. The basic principle of injection molding includes three main steps: injection, molten metal flow, and cooling and solidification.

[0004] Publication number "CN112589100A" describes "a pressure-injection chemical metal powder injection molding machine and its injection method. The device includes a lower fixed mold body, an upper movable mold body, and a guide tube. The upper movable mold body is spliced ​​on the upper side of the lower fixed mold body. An injection hole is opened at the right end of the docking position of the lower fixed mold body and the upper movable mold body. An injection needle is horizontally fixedly connected to the left end of the guide tube, and the injection needle is inserted into the injection hole. A metal powder storage cylinder is provided on the upper side of the guide tube near the right end. In this invention, the end of the linkage rotating plate lifts a metal weight, which facilitates the intake of air into the elastic corrugated airbag. Then, under the action of gravity, the metal weight, along with the top plate, falls downward and impacts the connecting plate at the upper end of the elastic corrugated airbag. This causes the elastic corrugated airbag to be compressed by the instantaneous impact force, thereby pushing the internal air into the injection needle tube with instantaneous high pressure."

[0005] In the aforementioned patent, whenever the end of the linkage rotating plate abuts against the lower right side of the metal weight, the linkage rotating plate lifts the metal weight upward. At this time, the elastic corrugated airbag expands due to the elasticity of its own material and draws in air. When the end of the linkage rotating plate detaches from the metal weight, the metal weight falls downward with the top plate under the action of gravity and hits the connecting plate at the upper end of the elastic corrugated airbag. This causes the elastic corrugated airbag to be compressed by the instantaneous impact force, thereby pushing the internal air into the injection needle tube with instantaneous high pressure. This promotes the powder material in the injection needle tube to rush into the inner space of the lower fixed mold body and the upper movable mold body with greater instantaneous pressure, pressurizing the material that has gathered together. This process is repeated to continuously generate greater instantaneous high pressure. However, due to the pressure-resistant design of the molding mold itself, the molding mold is large and heavy, and daily maintenance is difficult. In particular, when changing molds is required to produce different workpieces, mold replacement is time-consuming and labor-intensive, resulting in a reduction in the overall production efficiency of metal powder injection molding. Therefore, we propose a metal powder injection molding device and method. Summary of the Invention

[0006] The purpose of this invention is to provide a metal powder injection molding apparatus and method, which aims to reduce the volume and weight of a single molding die by disassembling the molding die, thereby reducing the difficulty of daily maintenance of the molding die, saving time and effort when changing molding dies between different workpieces, and improving the overall production efficiency of metal powder injection molding.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A metal powder injection molding apparatus, comprising a housing; A first support block is fixedly connected to the top of the chassis, and a second support block is fixedly connected to the top of the chassis. The second support block is located on one side of the first support block, and a hollow mold sleeve is provided between the first support block and the second support block. A mold frame, comprising multiple mold frames disposed between a first support block and a second support block, located on one side of a hollow mold sleeve, with threaded sleeves fixedly connected to the inner walls of each mold frame, and multiple molding modules fixed to the inner walls of the mold frames by bolts, the multiple molding modules forming a cavity; and An adjustment mechanism is provided, which is disposed between the first support block and the second support block. The adjustment mechanism is connected to multiple mold frames and is used to move multiple molding modules.

[0008] In a preferred embodiment of the present invention, the adjusting mechanism includes a driving component, a limiting component, a deflection component, a guiding component, a sleeve component, and a sliding component. The driving component is disposed between the inner walls of the sleeve and is connected to multiple molding modules. The limiting component is disposed between the inner walls of the sleeve and is connected to the driving component. The deflection component is disposed between the inner walls of the sleeve and is connected to multiple molding modules. Multiple sets of guiding components are provided and connected to multiple molding modules. The sleeve component is disposed between a first support block and a second support block and corresponds to multiple molding modules. The sliding component is disposed between the first support block and the second support block and is connected to the sleeve component and the hollow mold sleeve.

[0009] In a preferred embodiment of the present invention, the driving assembly includes a partition, a shaft, a turntable, a rotating hole, a driven gear, a driving gear, a stepper motor, and a motor mounting hole. The rotating hole is located at the side end of the hollow mold sleeve and communicates with the inner wall of the hollow mold sleeve. The turntable is rotatably connected to the inner wall of the rotating hole. The shaft is fixedly connected to the side end of the turntable and is located between the inner walls of the hollow mold sleeve, and the shaft passes through the partition. The driven gear is fixedly connected to the circumferential surface of the turntable and is located between the inner walls of the hollow mold sleeve, and the driven gear is located on one side of the partition. The motor mounting hole is located on one side of the hollow mold sleeve and communicates with the hollow mold sleeve. The stepper motor is fixedly connected inside the motor mounting hole, and the output end of the stepper motor extends to the inner wall of the hollow mold sleeve. The driving gear is located between the inner walls of the hollow mold sleeve and is fixedly connected to the output end of the stepper motor. The driving gear meshes with the driven gear.

[0010] In a preferred embodiment of the present invention, the limiting assembly includes a ratchet, a pawl, an arc groove, and an electric push rod. The ratchet is fixedly connected to the circumferential surface of the shaft and is located on the other side of the partition. The pawl is rotatably connected to the inner wall of the hollow mold sleeve and engages with the ratchet. The arc groove is formed on one side of the hollow mold sleeve and communicates with the inner wall of the hollow mold sleeve, and the arc groove corresponds to the pawl. The electric push rod is fixedly connected to one side of the hollow mold sleeve, and the output end of the electric push rod slides between the inner walls of the arc groove, and the output end of the electric push rod is rotatably connected to the pawl.

[0011] In a preferred embodiment of the present invention, the deflection assembly includes a rotating cavity, a rotating hole, a deflection shaft, a rotating frame, a worm gear, a worm wheel, and a servo motor. Multiple rotating cavities are provided, each located within a turntable and arranged circumferentially. Multiple rotating holes are provided, located at the side ends of the turntable and communicating with the rotating cavities. Multiple deflection shafts are provided, rotatably connected between the inner circumferential walls of the multiple rotating holes. One end of each deflection shaft extends between the inner walls of the multiple rotating cavities, and the other end of each deflection shaft connects to multiple rotating cavities. Each mold frame is connected to another mold frame. Multiple worm gears are fixedly connected to the circumferential surfaces of multiple deflection shafts. Multiple rotating frames are fixedly connected to the inner walls of rotating cavities and are located on one side of the worm gears. Multiple worms are rotatably connected between the inner walls of the rotating frames via rotating shafts. Each worm meshes with a worm gear. Multiple servo motors are fixedly connected to the inner walls of the rotating cavities, and their output ends are connected to the rotating shafts of the worms.

[0012] As a preferred embodiment of the present invention, each set of the guiding components includes an arc-shaped groove and a slider. The arc-shaped groove is formed at the side end of the turntable and is connected to the rotating cavity. The slider slides between the inner walls of the arc-shaped groove and is connected to the mold frame.

[0013] In a preferred embodiment of the present invention, the sliding assembly includes a slide rod, a spring, and a spring groove. Multiple slide rods are provided, and the multiple slide rods are fixedly connected between a first support block and a second support block. The multiple slide rods penetrate the hollow mold sleeve. Multiple spring grooves are provided, and the multiple spring grooves are formed at the side ends of the hollow mold sleeve. Multiple springs are provided, and the multiple springs are fixedly connected between the inner walls of the multiple spring grooves. All of the multiple springs are sleeved on the circumferential surface of the multiple slide rods.

[0014] In a preferred embodiment of the present invention, the sleeve assembly includes a sliding sleeve, a first push-pull rod, a sealing gasket, and a second push-pull rod. The sliding sleeve is sleeved on the circumferential surface of a plurality of sliding rods and is located on one side of a plurality of molding modules. The first push-pull rod is rotatably connected to the bottom of the sliding sleeve, and the second push-pull rod is rotatably connected to the inner wall of the housing. The other end of the second push-pull rod is rotatably connected to the first push-pull rod. The sealing gasket is fixedly connected to the side end of the sliding sleeve, and the sealing gasket corresponds to the gap between the turntable and the rotating hole.

[0015] As a preferred embodiment of the present invention, the side end of the sliding sleeve is fixedly connected to two sealing interfaces, and cooling pipes are provided in the sliding sleeve, multiple mold frames and multiple molding modules, with the two ends of the cooling pipes connected to the two sealing interfaces.

[0016] A method for metal powder injection molding includes the following steps: S1, Precision Molding: During metal powder injection molding, the output end of the hydraulic cylinder is extended by energizing it, pushing the hollow mold sleeve closer to the first support block. This causes multiple molding modules to fit into the first support block, sealing the cavity with the nozzle of the heated injection molding machine. The nozzle of the heated injection molding machine injects a mixture of metal powder and binder into the cavity at high temperature. Cooling water flows unidirectionally into the cooling pipe through two sealed interfaces, thereby cooling and solidifying the molten mixture in the cavity. By using multiple molding modules to divide the cavity corresponding to the complex structure workpiece, the molding difficulty of the complex structure workpiece is reduced, and the precise molding of the complex structure workpiece is achieved. S2, Quick Demolding: After the complex structure workpiece in the cavity cools and solidifies, the output end of the hydraulic cylinder retracts to pull the hollow mold sleeve back to its original position. Multiple springs buffer the impact force generated by the hollow mold sleeve. The hollow mold sleeve drives multiple mold frames to reset, indirectly pulling multiple mold frames out from the inner wall of the sliding sleeve. Then, multiple servo motors are started by powering on. The output ends of the multiple servo motors drive multiple worm gears to rotate. The multiple worm gears drive multiple worm wheels to rotate through meshing with multiple worm wheels. The multiple worm wheels drive multiple deflection shafts to rotate. The multiple deflection shafts drive multiple mold frames to rotate. In turn, the multiple mold frames rotate around the multiple deflection shafts as rotation axes. The multiple mold frames drive multiple forming modules to unfold in a circumferential distribution, causing the cavity to split. This makes it easier to remove the complex structure workpiece from the cavity, achieving rapid demolding of the complex structure workpiece. S3, Close docking: During precision molding, as multiple mold frames approach the first support block, they are inserted between the inner circumferential walls of the sliding sleeve. The sliding sleeve is slowly fitted onto the circumferential surfaces of the multiple mold frames, allowing them to precisely align towards the center. This splices the multiple molding modules into a single mold, reducing the gap between the multiple molding modules and preventing the molten mixture in the cavity from overflowing from the gaps between the multiple molding modules. This avoids burrs on the surface of complex workpieces and achieves precise alignment between the multiple molding modules. S4. Replace the module: During routine mold maintenance, the hydraulic cylinder retracts to pull the hollow mold sleeve, completely removing multiple mold frames and molding modules from the inner circumference of the sliding sleeve. The second push-pull rod, through a hinge with the first push-pull rod, restricts the sliding sleeve to the side near the first support block. The hollow mold sleeve does not reset and stops between the sealing gasket and the second support block. Power is applied to start multiple servo motors, whose outputs drive multiple worm gears to rotate. These worm gears, through meshing with multiple worm wheels, drive multiple worm wheels to rotate. These worm wheels drive multiple deflection shafts to rotate, which in turn drive multiple mold frames to rotate. This causes the mold frames to rotate around the deflection shafts, resulting in multiple molding modules unfolding in a circumferential distribution. Then, power is applied to start the electric push rod, whose output extends to push the ratchet... The pawl moves away from the ratchet, releasing the engagement between the pawl and the ratchet, which in turn releases the lock on the shaft rotation. Finally, the stepper motor is powered on and started. The output of the stepper motor drives the drive gear to rotate. The drive gear, through meshing with the driven gear, drives the shaft, turntable, multiple mold frames, and multiple molding modules to rotate, so that the multiple molding modules are one by one in a horizontal position on one side of the chassis. This makes it easy to unscrew the multiple bolts from the multiple screw sleeves one by one. Then, multiple molding modules with different cavities are used to replace the multiple molding modules in the multiple mold frames. The bolts of the multiple molding modules with different cavities are fixed in the multiple mold frames. Then, multiple servo motors are powered on and started to reset the multiple mold frames and multiple molding modules with different cavities. The output of the electric push rod retracts and pulls the pawl to engage with the ratchet, locking the rotation of the shaft and turntable. Finally, the replacement module of multiple molding modules is completed.

[0017] Compared with the prior art, the beneficial effects of the present invention are: In this solution, during the daily maintenance of the mold, multiple mold frames are used to accommodate multiple molding modules, multiple screw sleeves are used to accommodate multiple bolts, multiple molding modules are spliced ​​to form a cavity, the cavity is used to shape metal powder, and the adjustment mechanism is connected to multiple mold frames to move multiple molding modules. By disassembling the molding mold, the volume and weight of a single molding mold after disassembly are reduced, thereby reducing the difficulty of daily maintenance of the molding mold.

[0018] In this solution, the electric push rod deflects the pawl by extending and retracting the output end. When the output end of the electric push rod extends, it pushes the pawl to deflect, causing the pawl to disengage from the ratchet, thereby releasing the lock on the rotation of multiple molding modules. When the output end of the electric push rod retracts, it pulls the pawl to engage with the ratchet, restricting the rotation of the shaft, and thus locking the rotation of multiple molding modules. By extending and retracting the output end of the electric push rod and controlling the rotation of the ratchet and pawl, the rotation of multiple molding modules and the mold frame is controlled. This allows multiple molding modules to stop one by one on one side of the machine housing, enabling the individual disassembly and replacement of multiple molding modules. This saves time and effort when changing molding dies between different workpieces, improving the overall production efficiency of metal powder injection molding.

[0019] In this scheme, when deflecting multiple molding modules and mold frames, multiple servo motors are powered on and started. The output ends of the multiple servo motors drive multiple worm gears to rotate. The multiple worm gears mesh with multiple worm wheels, which in turn drive multiple deflection shafts to rotate. The multiple deflection shafts drive multiple mold frames to rotate, thereby causing the multiple mold frames to rotate around the multiple deflection shafts. The multiple mold frames drive multiple molding modules to unfold in a circumferential distribution, causing the cavity to split. This facilitates the removal of complex structural workpieces from the cavity, achieving rapid demolding of complex structural workpieces and improving the demolding efficiency of the metal powder injection molding device for complex structural workpieces.

[0020] In this solution, during the unfolding and docking of multiple molding modules, multiple sliders guide the deflection of multiple mold frames and molding modules through sliding cooperation with multiple arc-shaped grooves, thereby ensuring the precise offset of multiple molding modules and improving the processing accuracy of the metal powder injection molding device.

[0021] In this solution, during precise molding, as multiple mold frames approach the first support block, they are inserted between the inner circumferential walls of the sliding sleeve. The sliding sleeve is slowly fitted onto the circumferential surfaces of the multiple mold frames, allowing them to precisely align towards the center. This assembles the multiple molding modules into a single mold, reducing the gaps between them and preventing the molten mixture in the cavity from overflowing from the gaps. This avoids burrs on the surface of complex workpieces, achieves precise alignment between the multiple molding modules, and improves the yield of complex workpieces. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a first-view perspective perspective view of a metal powder injection molding apparatus according to the present invention; Figure 2 This is a second perspective view of a metal powder injection molding apparatus according to the present invention; Figure 3 This is a first half-sectional view of a metal powder injection molding apparatus according to the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a perspective view of the adjustment mechanism of a metal powder injection molding apparatus according to the present invention; Figure 6 This is a first half-sectional view of the adjustment mechanism of a metal powder injection molding apparatus according to the present invention; Figure 7 This is a second half-sectional view of the adjustment mechanism of a metal powder injection molding apparatus according to the present invention; Figure 8 This is a third half-sectional view of the adjustment mechanism of a metal powder injection molding apparatus according to the present invention; Figure 9 This invention relates to a metal powder injection molding apparatus. Figure 8 Enlarged view of point B; Figure 10 This is a fourth half-sectional view of the adjustment mechanism of a metal powder injection molding apparatus according to the present invention; Figure 11 This is a fifth half-sectional view of the adjustment mechanism of a metal powder injection molding apparatus according to the present invention; Figure 12 This is an exploded view of the first-view adjustment mechanism of a metal powder injection molding apparatus according to the present invention; Figure 13 This is an exploded view of the second perspective adjustment mechanism of a metal powder injection molding apparatus according to the present invention.

[0023] In the diagram: 1. Chassis; 2. Heated injection molding machine; 3. Hydraulic cylinder; 4. First support block; 5. Second support block; 6. Slide rod; 7. Slide sleeve; 8. Hollow mold sleeve; 9. Spring; 10. Spring groove; 11. Partition plate; 12. Shaft; 13. Turntable; 14. Arc-shaped slide groove; 15. Rotary hole; 16. Deflection shaft; 17. Rotating frame; 18. Worm gear; 19. Worm wheel; 20. Servo motor; 21. Slider; 22. Mold base ; 23. Screw sleeve; 24. Molding module; 25. Cavity; 26. Rotating hole; 27. Driven gear; 28. Drive gear; 29. ​​Stepper motor; 30. Motor mounting hole; 31. First push-pull rod; 32. Sealing interface; 33. Cooling pipe; 34. Sealing gasket; 35. Ratchet; 36. Pawl; 37. Arc groove; 38. Electric push rod; 39. Second push-pull rod; 40. Air pressure relief pipe; 41. Rotating cavity. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1 - Figure 13 A metal powder injection molding apparatus, comprising: Chassis 1; The first support block 4 is fixedly connected to the top of the chassis 1. The top of the chassis 1 is fixedly connected to the second support block 5, which is located on one side of the first support block 4. A hollow mold sleeve 8 is provided between the first support block 4 and the second support block 5. Multiple mold frames 22 are provided and are positioned between the first support block 4 and the second support block 5. The multiple mold frames 22 are located on one side of the hollow mold sleeve 8. Screw sleeves 23 are fixedly connected to the inner walls of each of the multiple mold frames 22. Multiple molding modules 24 are bolted together to the inner walls of the multiple mold frames 22, forming cavities 25. An adjustment mechanism is located between the first support block 4 and the second support block 5. The adjustment mechanism is connected to multiple mold frames 22 and is used to move multiple molding modules 24.

[0026] In this invention, the housing 1 is used to support and fix the heating injection molding machine 2, the hydraulic cylinder 3, the first support block 4, the second support block 5, and the second push-pull rod 39. The first support block 4 and the second support block 5 are used to support and fix multiple sliding rods 6. The hollow mold sleeve 8 is used to accommodate the drive assembly, the limiting assembly, and the swing assembly. Multiple mold frames 22 are used to accommodate multiple molding modules 24. Multiple screw sleeves 23 are used to accommodate multiple bolts. Multiple molding modules 24 are spliced ​​to form a cavity 25. The cavity 25 is used to shape metal powder. The adjustment mechanism is connected to multiple mold frames 22 to move multiple molding modules 24. By disassembling the molding mold, the volume and weight of a single molding mold after disassembly are reduced, thereby reducing the difficulty of daily maintenance of the molding mold.

[0027] The adjustment mechanism includes a drive component, a limiting component, a deflection component, a guide component, a sleeve component, and a sliding component. The drive component is disposed between the inner walls of the sliding sleeve 7 and is connected to multiple molding modules 24. The limiting component is disposed between the inner walls of the sliding sleeve 7 and is connected to the drive component. The deflection component is disposed between the inner walls of the sliding sleeve 7 and is connected to multiple molding modules 24. Multiple sets of guide components are provided and are connected to multiple molding modules 24. The sleeve component is disposed between the first support block 4 and the second support block 5 and corresponds to multiple molding modules 24. The sliding component is disposed between the first support block 4 and the second support block 5 and is connected to the sleeve component and the hollow mold sleeve 8.

[0028] In this invention, the driving component provides torque for the rotation of multiple molding modules 24, the limiting component restricts the rotation of multiple molding modules 24, the deflection component deflects multiple molding modules 24, multiple sets of guiding components guide the deflection of multiple mold frames 22, the sleeve component sleeves multiple mold frames 22 and molding modules 24, and the sliding component supports the sliding of the sliding sleeve 7 and the hollow mold sleeve 8.

[0029] The drive assembly includes a partition 11, a shaft 12, a turntable 13, a rotating hole 26, a driven gear 27, a driving gear 28, a stepper motor 29, and a motor mounting hole 30. The rotating hole 26 is located at the side end of the hollow mold sleeve 8 and communicates with the inner wall of the hollow mold sleeve 8. The turntable 13 is rotatably connected between the inner walls of the rotating hole 26. The shaft 12 is fixedly connected to the side end of the turntable 13 and is located between the inner walls of the hollow mold sleeve 8, and the shaft 12 passes through the partition 11. The driven gear 27 is fixedly connected to the circumference of the turntable 13. On the side, the driven gear 27 is located between the inner walls of the hollow mold sleeve 8 and is located on one side of the partition plate 11. The motor mounting hole 30 is opened on one side of the hollow mold sleeve 8 and is connected to the hollow mold sleeve 8. The stepper motor 29 is fixedly connected in the motor mounting hole 30 and the output end of the stepper motor 29 extends to the inner walls of the hollow mold sleeve 8. The driving gear 28 is located between the inner walls of the hollow mold sleeve 8 and is fixedly connected to the output end of the stepper motor 29. The driving gear 28 meshes with the driven gear 27.

[0030] In this invention, partition 11 is used to divide the inner wall space of the hollow mold sleeve 8, rotation hole 26 is used to accommodate the rotation of turntable 13, turntable 13 is used to support multiple deflection shafts 16, shaft 12 rotates synchronously with turntable 13, driven gear 27 is used to drive turntable 13 to rotate, motor mounting hole 30 is used to accommodate stepper motor 29, stepper motor 29 is used to drive driven gear 27 to rotate, driving gear 28 to rotate through meshing with driven gear 27, during the rotation of multiple mold frames 22 and molding module 24, stepper motor 29 is started by power-on. The output end of 29 drives the drive gear 28 to rotate. The drive gear 28 drives the driven gear 27 to rotate through meshing with the driven gear 27. The driven gear 27 drives the turntable 13 to rotate. The turntable 13 drives the shaft 12 and multiple deflection shafts 16 to rotate. The deflection shafts 16 drive multiple mold frames 22 and molding modules 24 to rotate. By rotating the multiple molding modules 24, the multiple mold frames 22 and molding modules 24 are positioned one by one on one side of the machine box 1, which makes it convenient for the staff to disassemble and replace the molding modules 24, effectively reducing the maintenance difficulty of the metal powder injection molding device.

[0031] The limiting assembly includes a ratchet 35, a pawl 36, an arc groove 37, and an electric push rod 38. The ratchet 35 is fixedly connected to the circumferential surface of the shaft 12 and is located on the other side of the partition 11. The pawl 36 is rotatably connected between the inner walls of the hollow mold sleeve 8 and engages with the ratchet 35. The arc groove 37 is formed on one side of the hollow mold sleeve 8 and communicates with the inner wall of the hollow mold sleeve 8. The arc groove 37 corresponds to the pawl 36. The electric push rod 38 is fixedly connected to one side of the hollow mold sleeve 8. The output end of the electric push rod 38 slides between the inner walls of the arc groove 37 and is rotatably connected to the pawl 36.

[0032] In this invention, the ratchet 35 rotates synchronously with the shaft 12, the pawl 36 engages with the ratchet 35, and the arc groove 37 accommodates the sliding of the output end of the electric push rod 38. The electric push rod 38 deflects the pawl 36 by extending and retracting its output end. When the output end of the electric push rod 38 extends, it pushes the pawl 36 to deflect, causing the pawl 36 to release its engagement with the ratchet 35, thereby releasing the lock on the rotation of the multiple molding modules 24. When the output end of the electric push rod 38 retracts, the output of the electric push rod 38... The output end pulls the pawl 36 to engage with the ratchet 35, restricting the rotation of the shaft 12, and then locking the rotation of multiple molding modules 24. By extending and retracting the output end of the electric push rod 38, the rotation of multiple molding modules 24 and mold frame 22 is controlled by whether the ratchet 35 and pawl 36 rotate. This makes it convenient for multiple molding modules 24 to be placed one by one on one side of the machine box 1, realizing the disassembly and replacement of multiple molding modules 24 one by one. This makes it time-saving and labor-saving to change molding molds between different workpieces, and improves the overall production efficiency of metal powder injection molding.

[0033] The deflection assembly includes a rotating cavity 41, rotating holes 15, deflection shafts 16, a rotating frame 17, a worm gear 18, a worm wheel 19, and a servo motor 20. Multiple rotating cavities 41 are provided, located within a turntable 13, and are arranged circumferentially. Multiple rotating holes 15 are provided, located on the side of the turntable 13, and are all connected to the rotating cavities 41. Multiple deflection shafts 16 are provided, rotatably connected between the inner circumferential walls of the multiple rotating holes 15. One end of each deflection shaft 16 extends between the inner walls of the multiple rotating cavities 41, and the other end connects to multiple mold frames 20. The system is connected in two phases. Multiple worm gears 19 are fixedly connected to the circumferential surface of multiple deflection shafts 16. Multiple rotating frames 17 are fixedly connected to the inner wall of the rotating cavity 41 and are located on one side of the multiple worm gears 19. Multiple worms 18 are rotatably connected between the inner walls of the multiple rotating frames 17 via rotating shafts. All worms 18 mesh with the multiple worm gears 19. Multiple servo motors 20 are fixedly connected to the inner wall of the multiple rotating cavities 41, and the output ends of the multiple servo motors 20 are connected to the rotating shafts of the multiple worms 18.

[0034] In this invention, a plurality of air pressure relief pipes 40 are provided inside the turntable 13. These air pressure relief pipes 40 are connected to a plurality of rotating cavities 41, which are also connected to the inner wall of the hollow mold sleeve 8. The rotating cavities 41 accommodate a plurality of deflection shafts 16, a rotating frame 17, worm gears 18, worm wheels 19, and servo motors 20. A plurality of rotating holes 15 accommodate a plurality of deflection shafts 16, which support and fix a plurality of mold frames 22. A plurality of worm wheels 19 drive the plurality of deflection shafts 16 to rotate. A plurality of rotating frames 17 support a plurality of worm gears 18, which, through engagement with the plurality of worm wheels 19, drive the plurality of worm wheels 19 to rotate. A plurality of servo motors 20 drive the plurality of worm gears 18 to rotate. This process is repeated for each mold frame 22. When the molding module 24 and the mold base 22 deflect, multiple servo motors 20 are powered on. The output ends of the multiple servo motors 20 drive multiple worm gears 18 to rotate. The multiple worm gears 18 mesh with multiple worm wheels 19 to drive multiple worm wheels 19 to rotate. The multiple worm wheels 19 drive multiple deflection shafts 16 to rotate. The multiple deflection shafts 16 drive multiple mold bases 22 to rotate. In turn, the multiple mold bases 22 drive multiple molding modules 24 to unfold in a circumferential distribution, causing the cavity 25 to split. This facilitates the removal of complex structure workpieces from the cavity 25, achieving rapid demolding of complex structure workpieces and improving the demolding efficiency of the metal powder injection molding device for complex structure workpieces.

[0035] Each set of guide components includes an arc-shaped slide 14 and a slider 21. The arc-shaped slide 14 is opened at the side end of the turntable 13 and is connected to the rotating cavity 41. The slider 21 slides between the inner walls of the arc-shaped slide 14 and is connected to the mold frame 22.

[0036] In this invention, the arc-shaped groove 14 is provided to accommodate the sliding of the slider 21. The slider 21 limits the maximum and minimum deflection angles of the mold frame 22 and the forming module 24 by sliding with the arc-shaped groove 14, thereby limiting the deflection angle of the forming module 24. When multiple forming modules 24 are unfolded and docked, multiple sliders 21 guide the deflection of multiple mold frames 22 and forming modules 24 by sliding with multiple arc-shaped grooves 14, thereby ensuring the precise offset of multiple forming modules 24 and improving the processing accuracy of the metal powder injection molding device.

[0037] The sliding assembly includes a slide rod 6, a spring 9, and a spring groove 10. Multiple slide rods 6 are provided and are fixedly connected between the first support block 4 and the second support block 5. Multiple slide rods 6 pass through the hollow mold sleeve 8. Multiple spring grooves 10 are provided and are opened at the side end of the hollow mold sleeve 8. Multiple springs 9 are provided and are fixedly connected between the inner walls of the multiple spring grooves 10. All multiple springs 9 are sleeved on the circumferential surface of the multiple slide rods 6.

[0038] In this invention, multiple sliding rods 6 are used to support the sliding of multiple hollow mold sleeves 8, and multiple spring grooves 10 are used to accommodate multiple springs 9. The multiple springs 9 are used to buffer the impact of the hollow mold sleeves 8 on the second support block 5. During the parallel movement of the hollow mold sleeves 8, during the reset process of the hollow mold sleeves 8, the hollow mold sleeves 8 slide and engage with the multiple sliding rods 6. The hollow mold sleeves 8 push the multiple springs 9 to impact the second support block 5. The expansion and contraction deformation of the multiple springs 9 buffers the impact damage of the hollow mold sleeves 8 and the second support block 5. At the same time, the multiple springs 9 prevent the stepper motor 29, the electric push rod 38 and the second support block 5 from collision damage.

[0039] The fitting assembly includes a sliding sleeve 7, a first push-pull rod 31, a sealing gasket 34, and a second push-pull rod 39. The sliding sleeve 7 is fitted onto the circumferential surface of multiple sliding rods 6 and is located on one side of multiple molding modules 24. The first push-pull rod 31 is rotatably connected to the bottom of the sliding sleeve 7, and the second push-pull rod 39 is rotatably connected to the inner wall of the housing 1. The other end of the second push-pull rod 39 is rotatably connected to the first push-pull rod 31. The sealing gasket 34 is fixedly connected to the side end of the sliding sleeve 7, and the sealing gasket 34 corresponds to the gap between the turntable 13 and the rotating hole 26.

[0040] In this invention, the sliding sleeve 7 is used to accommodate multiple mold frames 22 and multiple forming modules 24. The first push-pull rod 31 is used to restrict the movement of the sliding sleeve 7, and the second push-pull rod 39 is used to pull the first push-pull rod 31. The sealing gasket 34 is used to seal the gap between the turntable 13 and the rotating hole 26. During precise forming, as the multiple mold frames 22 approach the first support block 4, the multiple mold frames 22 are inserted between the inner circumferential walls of the sliding sleeve 7. The sliding sleeve 7 is slowly fitted onto the circumferential surface of the multiple mold frames 22, so that the multiple mold frames 22 are precisely aligned towards the center, splicing the multiple forming modules 24 into a whole mold. This reduces the gap between the multiple forming modules 24, thereby preventing the molten mixture in the cavity 25 from overflowing from the gap between the multiple forming modules 24, thus avoiding burrs on the surface of the complex structure workpiece, achieving precise alignment between the multiple forming modules 24, and improving the yield of the complex structure workpiece.

[0041] Two sealing interfaces 32 are fixedly connected to the side end of the sliding sleeve 7. Cooling pipes 33 are provided inside the sliding sleeve 7, multiple mold frames 22 and multiple molding modules 24. The two ends of the cooling pipes 33 are connected to the two sealing interfaces 32.

[0042] In this invention, two sealed interfaces 32 are used for the inlet and outlet of cooling water, and the cooling pipe 33 is used for the flow of cooling water. The cooling water is used to quickly cool the complex structure workpiece in the cavity 25, thereby accelerating the processing efficiency of the metal powder injection molding device.

[0043] A method for metal powder injection molding includes the following steps: S1, Precision Molding: During the metal powder injection molding process, the output end of the hydraulic cylinder 3 is extended by energizing it, pushing the hollow mold sleeve 8 closer to the first support block 4. This causes multiple molding modules 24 to fit into the first support block 4, making the cavity 25 seal and connect with the nozzle of the heated injection molding machine 2. The nozzle of the heated injection molding machine 2 injects a mixture of metal powder and binder into the cavity 25 at high temperature. Cooling water flows unidirectionally into the cooling pipe 33 through two sealed interfaces 32, thereby cooling and solidifying the molten mixture in the cavity 25. Multiple molding modules 24 are used to divide the cavity 25 corresponding to the complex structure workpiece, reducing the molding difficulty of the complex structure workpiece and achieving precise molding of the complex structure workpiece. S2, Quick Demolding: After the complex structure workpiece in the cavity 25 cools and forms, the output end of the hydraulic cylinder 3 retracts and pulls the hollow mold sleeve 8 to reassemble. Multiple springs 9 buffer the impact force generated by the hollow mold sleeve 8. The hollow mold sleeve 8 drives multiple mold frames 22 to reset, indirectly pulling the multiple mold frames 22 out from the inner wall of the sliding sleeve 7. Then, multiple servo motors 20 are started by powering on. The output ends of the multiple servo motors 20 drive multiple worm gears 18 to rotate. The multiple worm gears 18 drive multiple worm wheels 19 to rotate through meshing with multiple worm wheels 19. The multiple worm wheels 19 drive multiple deflection shafts 16 to rotate. The multiple deflection shafts 16 drive multiple mold frames 22 to rotate. Then, the multiple mold frames 22 rotate around the multiple deflection shafts 16 as the rotation axis. The multiple mold frames 22 drive multiple forming modules 24 to unfold in a circumferential distribution, causing the cavity 25 to split, making it easier to remove the complex structure workpiece in the cavity 25 and realize the rapid demolding of the complex structure workpiece. S3, Close docking: During precision molding, as the multiple mold frames 22 approach the first support block 4, the multiple mold frames 22 are inserted between the inner circumferential walls of the sliding sleeve 7. The sliding sleeve 7 is slowly fitted onto the circumferential surface of the multiple mold frames 22, so that the multiple mold frames 22 are precisely aligned towards the center, and the multiple molding modules 24 are spliced ​​into a whole mold, which reduces the gap between the multiple molding modules 24, thereby preventing the molten mixture in the cavity 25 from overflowing from the gap between the multiple molding modules 24, thus avoiding burrs on the surface of the complex structure workpiece, and achieving precise alignment between the multiple molding modules 24. S4. Replace the module: During routine mold maintenance, the output end of the hydraulic cylinder 3 retracts to pull the hollow mold sleeve 8, completely pulling out multiple mold frames 22 and multiple molding modules 24 from the inner circumference of the sliding sleeve 7. The second push-pull rod 39, through its hinge with the first push-pull rod 31, restricts the sliding sleeve 7 to the side near the first support block 4. The hollow mold sleeve 8 does not reset and stops between the sealing gasket 34 and the second support block 5. Power is applied to start multiple servo motors 20, whose output ends drive multiple worm gears 18 to rotate. The multiple worm gears 18, through meshing with multiple worm wheels 19, drive multiple worm wheels 19 to rotate. The multiple worm wheels 19 drive multiple deflection shafts 16 to rotate, which in turn drive multiple mold frames 22 to rotate. Consequently, the multiple mold frames 22 rotate around the multiple deflection shafts 16 as rotation axes, causing the multiple mold frames 22 to unfold in a circumferential distribution. Then, power is applied to start the electric push rod 38, whose output end extends to push the pawl 36 away from the ratchet 35. The pawl 36 is released from engagement with the ratchet 35, thereby releasing the lock on the rotation of the shaft 12. Finally, the stepper motor 29 is powered on and started. The output of the stepper motor 29 drives the drive gear 28 to rotate. The drive gear 28, through meshing with the driven gear 27, drives the shaft 12, turntable 13, multiple mold frames 22, and multiple molding modules 24 to rotate, so that the multiple molding modules 24 are positioned one by one in a horizontal position on one side of the machine housing 1, making it convenient to screw the multiple bolts out of the multiple screw sleeves 23 one by one. Then, multiple molding modules 24 with different cavities 25 are used to replace multiple molding modules 24 in multiple mold frames 22. The multiple molding modules 24 with different cavities 25 are bolted to the multiple mold frames 22. Then, multiple servo motors 20 are powered on to reset the multiple mold frames 22 and the multiple molding modules 24 with different cavities 25. The output end of the electric push rod 38 retracts and pulls the pawl 36 to engage with the ratchet 35, locking the rotation of the shaft 12 and the turntable 13. Finally, the replacement module of multiple molding modules 24 is completed.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal powder injection molding device, characterized in that: include; Chassis (1); A first support block (4), the first support block (4) being fixedly connected to the top of the chassis (1), the top of the chassis (1) being fixedly connected to a second support block (5), the second support block (5) being located on one side of the first support block (4), and a hollow mold sleeve (8) being provided between the first support block (4) and the second support block (5); A mold frame (22), wherein a plurality of mold frames (22) are provided, the plurality of mold frames (22) are provided between the first support block (4) and the second support block (5), the plurality of mold frames (22) are located on one side of the hollow mold sleeve (8), a screw sleeve (23) is fixedly connected between the inner walls of the plurality of mold frames (22), a plurality of molding modules (24) are fixed between the inner walls of the plurality of mold frames (22) by bolts, and the plurality of molding modules (24) form a mold cavity (25); and An adjustment mechanism, wherein the adjustment mechanism is arranged between the first support block (4) and the second support block (5), and the adjustment mechanism is connected to the plurality of mold frames (22) to move the plurality of molding modules (24).

2. A metal powder injection molding device according to claim 1, characterized in that: The adjustment mechanism comprises a driving component, a limiting component, a deflection component, a guiding component, a sleeve component and a sliding component. The driving component is arranged between the inner walls of the sliding sleeve (7), and the driving component is connected to a plurality of molding modules (24). The limiting component is arranged between the inner walls of the sliding sleeve (7), and the limiting component is connected to the driving component. The deflection component is arranged between the inner walls of the sliding sleeve (7), and the deflection component is connected to a plurality of molding modules (24). The guiding component is provided in a plurality of groups, and a plurality of groups of the guiding components are connected to a plurality of molding modules (24). The sleeve component is arranged between the first support block (4) and the second support block (5), and the sleeve component corresponds to the plurality of molding modules (24). The sliding component is arranged between the first support block (4) and the second support block (5), and the sliding component is connected to the sleeve component and the hollow mold sleeve (8).

3. A metal powder injection molding device according to claim 2, characterized in that: The driving assembly comprises a partition (11), a shaft (12), a rotating disk (13), a rotating hole (26), a driven gear (27), a driving gear (28), a stepping motor (29) and a motor mounting hole (30), wherein the rotating hole (26) is formed at a side end of the hollow mold sleeve (8), the rotating hole (26) is communicated with an inner wall of the hollow mold sleeve (8), the rotating disk (13) is rotatably connected between the inner walls of the rotating hole (26), the shaft (12) is fixedly connected to the side end of the rotating disk (13), the shaft (12) is located between the inner walls of the hollow mold sleeve (8), and the shaft (12) passes through the partition (11), and the driven gear (27) is fixedly connected to the inner wall of the rotating disk (13). The driven gear (27) is located between the inner walls of the hollow mold sleeve (8), and the driven gear (27) is located on one side of the partition plate (11). The motor mounting hole (30) is opened on one side of the hollow mold sleeve (8), and the motor mounting hole (30) is communicated with the hollow mold sleeve (8). The stepping motor (29) is fixedly connected in the motor mounting hole (30), and the output end of the stepping motor (29) extends between the inner walls of the hollow mold sleeve (8). The driving gear (28) is arranged between the inner walls of the hollow mold sleeve (8), and the driving gear (28) is fixedly connected to the output end of the stepping motor (29). The driving gear (28) is meshed with the driven gear (27).

4. A metal powder injection molding device according to claim 3, characterized in that: The limiting assembly comprises a ratchet (35), a pawl (36), an arc groove (37) and an electric push rod (38); the ratchet (35) is fixedly connected to the circumferential surface of the shaft (12); the ratchet (35) is located on the other side of the partition (11); the pawl (36) is rotatably connected between the inner walls of the hollow mold sleeve (8); the pawl (36) is engaged with the ratchet (35); the arc groove (37) is opened on one side of the hollow mold sleeve (8); the arc groove (37) is connected to the inner wall of the hollow mold sleeve (8); the arc groove (37) corresponds to the pawl (36); the electric push rod (38) is fixedly connected to one side of the hollow mold sleeve (8); the output end of the electric push rod (38) slides between the inner walls of the arc groove (37); and the output end of the electric push rod (38) is rotatably connected to the pawl (36).

5. A metal powder injection molding device according to claim 4, characterized in that: The deflection assembly comprises a rotating chamber (41), a rotating hole (15), a deflection shaft (16), a rotating frame (17), a worm (18), a worm wheel (19) and a servo motor (20). A plurality of the rotating chambers (41) are provided, and the plurality of the rotating chambers (41) are opened in the rotating disk (13). The plurality of the rotating chambers (41) are distributed in a circumferential manner. A plurality of the rotating holes (15) are provided, and the plurality of the rotating holes (15) are opened at the side end of the rotating disk (13). The plurality of the rotating holes (15) are all connected to the rotating chamber (41). A plurality of the deflection shafts (16) are provided, and the plurality of the deflection shafts (16) are rotatably connected between the circumferential inner walls of the plurality of rotating holes (15). One end of the plurality of the deflection shafts (16) extends between the inner walls of the plurality of rotating chambers (41), and the other end of the plurality of the deflection shafts (16) is connected to the plurality of rotating chambers (41). The mold frame (22) is connected, a plurality of worm wheels (19) are provided, and the plurality of worm wheels (19) are fixedly connected to the circumferential surfaces of the plurality of deflection shafts (16); a plurality of rotating frames (17) are provided, and the plurality of rotating frames (17) are fixedly connected to the inner wall of the rotating cavity (41), and the plurality of rotating frames (17) are located on one side of the plurality of worm wheels (19); a plurality of worm screws (18) are provided, and the plurality of worm screws (18) are rotatably connected between the inner walls of the plurality of rotating frames (17) through rotating shafts, and the plurality of worm screws (18) are all meshed with the plurality of worm wheels (19); a plurality of servo motors (20) are provided, and the plurality of servo motors (20) are fixedly connected to the inner walls of the plurality of rotating cavities (41), and the output ends of the plurality of servo motors (20) are connected to the rotating shafts of the plurality of worm screws (18).

6. A metal powder injection molding device according to claim 5, characterized in that: Each group of the guide components comprises an arc-shaped slide groove (14) and a slider (21), wherein the arc-shaped slide groove (14) is provided at a side end of the turntable (13), the arc-shaped slide groove (14) is connected to the rotating cavity (41), the slider (21) slides between the inner walls of the arc-shaped slide groove (14), and the slider (21) is connected to the mold frame (22).

7. A metal powder injection molding device according to claim 6, characterized in that: The sliding assembly comprises a sliding rod (6), a spring (9) and a spring groove (10); a plurality of the sliding rods (6) are provided, and the plurality of the sliding rods (6) are fixedly connected between the first support block (4) and the second support block (5); a plurality of the sliding rods (6) penetrate the hollow mold sleeve (8); a plurality of the spring grooves (10) are provided, and the plurality of the spring grooves (10) are opened at the side end of the hollow mold sleeve (8); a plurality of the springs (9) are provided, and the plurality of the springs (9) are fixedly connected between the inner walls of the plurality of spring grooves (10), and the plurality of the springs (9) are all sleeved on the circumferential surfaces of the plurality of sliding rods (6).

8. The metal powder injection molding device according to claim 7, characterized in that: The sleeve assembly comprises a sliding sleeve (7), a first push-pull rod (31), a sealing gasket (34) and a second push-pull rod (39); the sliding sleeve (7) is sleeved on the circumferential surface of a plurality of sliding rods (6); the sliding sleeve (7) is located on one side of a plurality of forming modules (24); the first push-pull rod (31) is rotatably connected to the bottom of the sliding sleeve (7); the second push-pull rod (39) is rotatably connected to the inner wall of the chassis (1); the other end of the second push-pull rod (39) is rotatably connected to the first push-pull rod (31); the sealing gasket (34) is fixedly connected to the side end of the sliding sleeve (7); the sealing gasket (34) corresponds to the gap between the turntable (13) and the rotating hole (26).

9. A metal powder injection molding device according to claim 8, characterized in that: The side ends of the sliding sleeve (7) are fixedly connected to two sealing interfaces (32); a cooling pipeline (33) is provided inside the sliding sleeve (7), the plurality of mold frames (22) and the plurality of molding modules (24); and the two ends of the cooling pipeline (33) are connected to the two sealing interfaces (32).

10. A metal powder injection molding method, characterized in that: A metal powder injection molding device as claimed in any one of claims 1 to 9, comprising the following steps: S1. Precision molding: During the injection molding of metal powder, the output end of the hydraulic cylinder (3) is powered on to extend and push the hollow mold sleeve (8) toward the first support block (4), thereby making the plurality of molding modules (24) fit the first support block (4), so that the mold cavity (25) is sealed and docked with the nozzle of the heated injection molding machine (2), and the nozzle of the heated injection molding machine (2) injects the metal powder and binder mixture into the mold cavity (25) at high temperature, and cools and solidifies the molten mixture in the mold cavity (25) by unidirectionally flowing cooling water into the cooling pipe (33) through two sealing interfaces (32). The mold cavity (25) corresponding to the complex structure workpiece is divided by using the plurality of molding modules (24), thereby reducing the difficulty of molding the complex structure workpiece and achieving accurate molding of the complex structure workpiece; S2, quick demoulding: When the complex structure workpiece in the cavity (25) is cooled and formed, the output end of the hydraulic cylinder (3) contracts to pull the hollow mold sleeve (8) to reset, and the plurality of springs (9) buffer the impact force generated by the hollow mold sleeve (8). The hollow mold sleeve (8) drives the plurality of mold frames (22) to reset, and indirectly pulls the plurality of mold frames (22) out of the inner wall of the sliding sleeve (7). Then, the plurality of servo motors (20) are powered on and started. The output ends of the plurality of servo motors (20) drive the plurality of worms (18) to rotate. The plurality of worms (18) rotate by interlocking with the plurality of worm wheels ( The meshing of the plurality of worm gears (19) drives the plurality of worm gears (19) to rotate, the plurality of worm gears (19) drives the plurality of deflection shafts (16) to rotate, the plurality of deflection shafts (16) drives the plurality of mold frames (22) to rotate, and then the plurality of mold frames (22) rotate with the plurality of deflection shafts (16) as rotating shafts, the plurality of mold frames (22) drives the plurality of molding modules (24) to spread out in a circular distribution, so that the mold cavity (25) is split, which facilitates the removal of a complex structure workpiece in the mold cavity (25), thereby realizing rapid demoulding of the complex structure workpiece; S3, close connection: During precise molding, when the plurality of mold frames (22) are approaching the first support block (4), the plurality of mold frames (22) are inserted between the circumferential inner walls of the sliding sleeve (7), and the sliding sleeve (7) is slowly sleeved on the circumferential surface of the plurality of mold frames (22), so that the plurality of mold frames (22) are precisely butted toward the center, and the plurality of molding modules (24) are spliced ​​into an integral mold, so that the gaps between the plurality of molding modules (24) are reduced, thereby preventing the molten mixture in the mold cavity (25) from overflowing from the gaps between the plurality of molding modules (24), thereby avoiding burrs on the surface of a workpiece with a complex structure, and achieving precise butt joint between the plurality of molding modules (24); S4. Replace module: During routine maintenance of the mold, the output end of the hydraulic cylinder (3) contracts and pulls the hollow mold sleeve (8), so that the multiple mold frames (22) and the multiple molding modules (24) are completely pulled out from the inner wall of the sliding sleeve (7). The second push-pull rod (39) is hinged with the first push-pull rod (31) to restrict the sliding sleeve (7) to the side close to the first support block (4). The hollow mold sleeve (8) does not reset and stops between the sealing pad (34) and the second support block (5). The multiple servo motors (20) are powered on and started. The output ends of the multiple servo motors (20) drive the multiple worm gears (18) to move. The plurality of worms (18) are engaged with the plurality of worm wheels (19) to drive the plurality of worm wheels (19) to rotate, the plurality of worm wheels (19) drive the plurality of deflection shafts (16) to rotate, the plurality of deflection shafts (16) drive the plurality of mold frames (22) to rotate, and then the plurality of mold frames (22) are rotated with the plurality of deflection shafts (16) as rotation shafts, the plurality of mold frames (22) drive the plurality of molding modules (24) to spread out in a circular distribution, and then power is turned on to start the electric push rod (38), the output end of the electric push rod (38) extends to push the pawl (36) away from the ratchet wheel (35), and the release The ratchet pawl (36) is engaged with the ratchet wheel (35), and then the rotation lock of the shaft (12) is released. Finally, the stepper motor (29) is powered on to start the stepper motor (29). The output end of the stepper motor (29) drives the driving gear (28) to rotate. The driving gear (28) drives the shaft (12), the turntable (13), the plurality of mold frames (22) and the plurality of molding modules (24) to rotate by meshing with the driven gear (27), so that the plurality of molding modules (24) are in a horizontal position on one side of the chassis (1), so that the plurality of bolts can be spirally removed from the plurality of screw sleeves (23) one by one, and then the plurality of bolts can be spirally removed from the plurality of screw sleeves (23) one by one. Multiple molding modules (24) of the same cavity (25) are used to replace multiple molding modules (24) in multiple mold frames (22), and multiple molding modules (24) of different cavities (25) are bolted into multiple mold frames (22). Then, multiple servo motors (20) are powered on to reset the multiple mold frames (22) and the multiple molding modules (24) of different cavities (25). The output end of the electric push rod (38) contracts and pulls the ratchet (36) to engage with the ratchet (35), thereby locking the rotation of the shaft (12) and the turntable (13), and finally forming a replacement module for the multiple molding modules (24) in pairs.

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