Metal powder injection molding device and method

Abstract

The present invention provides a metal powder injection molding device and method, belonging to the technical field of metal powder injection molding devices, which comprises a chassis; a first support block, the first support block is fixedly connected to the top of the chassis, the top of the chassis is fixedly connected to a second support block, the second support block is located on one side of the first support block, and a hollow mold sleeve is arranged between the first support block and the second support block; a mold frame, a plurality of mold frames are arranged, and the plurality of mold frames are arranged between the first support block and the second support block. During the daily maintenance of the mold, the plurality of mold frames are used to accommodate a plurality of molding modules, the plurality of screw sleeves are used to accommodate a plurality of bolts, the plurality of molding modules are spliced ​​to form a cavity, the cavity is used to shape the metal powder, the adjustment mechanism is connected to the plurality of mold frames, and is used to move the plurality of molding modules, and the volume and weight of a single molding mold after the split are reduced by splitting the molding mold, thereby reducing the difficulty of daily maintenance of the molding mold.

Description

Technical Field

[0001] The invention belongs to the technical field of metal powder injection molding devices, and in particular relates to a metal powder injection molding device and method. Background Art

[0002] Metal powder is a tiny particle or powdered substance made of metal or alloy through a specific process. This powder can be composed of one or more metal elements, such as iron, copper, aluminum, zinc, titanium, etc., or an alloy composed of these metals. There are many ways to prepare it, including mechanical crushing, physical and chemical methods, and electrolysis.

[0003] Injection molding is an important part of the die casting process, which involves injecting molten metal into the mold cavity under high pressure and allowing it to cool and solidify under pressure to form parts or components of the desired shape. The basic principle of injection molding includes three main steps: pressing, metal liquid flow and cooling and solidification.

[0004] Publication number "CN112589100A" records "a chemical metal powder injection molding device with pressure-collecting injection and an injection method thereof, the device comprises a lower fixed mold body, an upper movable mold body and a material guide transverse tube, the upper movable mold body is spliced ​​on the upper side of the lower fixed mold body, an injection hole is provided at the right end of the docking position between the lower fixed mold body and the upper movable mold body, an injection needle is horizontally fixedly connected to the left end of the material guide transverse tube, and the injection needle is inserted into the injection hole, and a metal powder storage barrel is provided on the upper side of the material guide transverse tube near the right end. The end of the linkage rotating plate of the present invention lifts up the metal weight block to facilitate the elastic corrugated airbag to inhale air, and then the metal weight block 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, causing the elastic corrugated airbag to be compressed by the instantaneous impact force, thereby pushing the internal air into the injection needle tube with instantaneous strong pressure."

[0005] In the above-mentioned patent, whenever the end of the linkage rotating plate contacts the lower right end surface of the metal weight, the linkage rotating plate pushes the metal weight upward. At this time, the elastic corrugated airbag is expanded by the elastic force of its own material, and air is sucked in from the inside. When the end of the linkage rotating plate is separated 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, causing the elastic corrugated airbag to be compressed by the instantaneous impact force, thereby pushing the internal air into the injection needle tube with instantaneous strong pressure, promoting 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 gathered materials, and repeating this process to continuously generate greater instantaneous strong pressure. However, due to the pressure-resistant design of the molding mold itself, the molding mold is large in size and heavy in weight, and is difficult to maintain on a daily basis. In particular, when the mold needs to be replaced when producing different workpieces, the mold replacement is time-consuming and labor-intensive, resulting in a decrease in the overall production efficiency of metal powder injection molding. For this reason, we propose a metal powder injection molding device and method. Summary of the invention

[0006] The purpose of the present invention is to provide a metal powder injection molding device and method, which aims to reduce the volume and weight of a single molding mold by splitting the molding mold, thereby reducing the difficulty of daily maintenance of the molding mold, saving time and effort in replacing the molding mold between the production of different workpieces, and improving the overall production efficiency of metal powder injection molding.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A metal powder injection molding device, comprising a chassis;

[0009] A first support block, wherein the first support block is fixedly connected to the top of the chassis, the top of the chassis is fixedly connected to a second support block, the second support block is located at one side of the first support block, and a hollow mold sleeve is provided between the first support block and the second support block;

[0010] A mold frame, wherein a plurality of mold frames are provided, the plurality of mold frames are provided between the first support block and the second support block, the plurality of mold frames are located on one side of the hollow mold sleeve, the inner walls of the plurality of mold frames are fixedly connected with screw sleeves, the inner walls of the plurality of mold frames are fixed with a plurality of molding modules by bolts, and the plurality of molding modules form a mold cavity; and

[0011] The adjusting mechanism is arranged between the first supporting block and the second supporting block, and the adjusting mechanism is connected to the plurality of mold frames to move the plurality of molding modules.

[0012] As a preferred solution of the present invention, the adjustment 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 arranged between the inner walls of the sleeve, and the driving component is connected to multiple forming modules. The limiting component is arranged between the inner walls of the sleeve, and the limiting component is connected to the driving component. The deflection component is arranged between the inner walls of the sleeve, and the deflection component is connected to multiple forming modules. The guiding component is provided in multiple groups, and multiple groups of the guiding components are connected to multiple forming modules. The sleeve component is arranged between the first support block and the second support block, and the sleeve component corresponds to multiple forming modules. The sliding component is arranged between the first support block and the second support block, and the sliding component is connected to the sleeve component and the hollow mold sleeve.

[0013] As a preferred solution of the present invention, the driving assembly includes a partition, an axle, a turntable, a rotating hole, a driven gear, a driving gear, a stepping motor and a motor mounting hole, the rotating hole is opened at the side end of the hollow mold sleeve, the rotating hole is communicated with the inner wall of the hollow mold sleeve, the turntable is rotatably connected between the inner walls of the rotating hole, the axle is fixedly connected to the side end of the turntable, the axle is located between the inner walls of the hollow mold sleeve, and the axle passes through the partition, the driven gear is fixedly connected to the circumferential surface of the turntable, the driven gear 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 opened on one side of the hollow mold sleeve, the motor mounting hole is communicated with the hollow mold sleeve, the stepping motor is fixedly connected in the motor mounting hole, the output end of the stepping motor extends between the inner walls of the hollow mold sleeve, the driving gear is arranged between the inner walls of the hollow mold sleeve, the driving gear is fixedly connected to the output end of the stepping motor, and the driving gear is meshed with the driven gear.

[0014] As a preferred solution 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 rod, the ratchet is located on the other side of the partition, the pawl is rotatably connected between the inner walls of the hollow mold sleeve, the pawl is engaged with the ratchet, the arc groove is opened on one side of the hollow mold sleeve, the arc groove is connected to 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, 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.

[0015] As a preferred solution of the present invention, the deflection assembly includes a rotating cavity, a rotating hole, a deflection shaft, a rotating frame, a worm, a worm wheel and a servo motor, wherein a plurality of the rotating cavities are provided, and a plurality of the rotating cavities are opened in a rotating disk, and a plurality of the rotating cavities are distributed in a circle, a plurality of the rotating holes are provided, and a plurality of the rotating holes are opened at the side end of the rotating disk, and a plurality of the rotating holes are connected to the rotating cavity, a plurality of the deflection shafts are provided, and a plurality of the deflection shafts are rotatably connected between the circumferential inner walls of a plurality of rotating holes, one end of a plurality of the deflection shafts extends between the inner walls of a plurality of rotating cavities, and the other end of a plurality of the deflection shafts is connected to a plurality of The plurality of worm gears are connected to the mold frames, a plurality of worm gears are provided, and the plurality of worm gears are fixedly connected to the circumferential surfaces of the plurality of deflection shafts, a plurality of rotating frames are provided, and the plurality of rotating frames are fixedly connected to the inner wall of the rotating cavity, and the plurality of rotating frames are located on one side of the plurality of worm gears, a plurality of worm screws are provided, and the plurality of worm screws are rotatably connected between the inner walls of the plurality of rotating frames through rotating shafts, and the plurality of worm screws are meshed with the plurality of worm gears, a plurality of servo motors are provided, and the plurality of servo motors are fixedly connected to the inner walls of the plurality of rotating cavities, and the output ends of the plurality of servo motors are connected to the rotating shafts of the plurality of worm screws.

[0016] As a preferred solution of the present invention, each group of the guide components includes an arc-shaped slide groove and a slider, the arc-shaped slide groove is opened at the side end of the turntable, the arc-shaped slide groove is connected to the rotating cavity, the slider slides between the inner walls of the arc-shaped slide groove, and the slider is connected to the mold frame.

[0017] As a preferred solution of the present invention, the sliding assembly includes a sliding rod, a spring and a spring groove, wherein a plurality of the sliding rods are provided, and a plurality of the sliding rods are fixedly connected between the first support block and the second support block, and a plurality of the sliding rods penetrate the hollow mold sleeve, and a plurality of the spring grooves are provided, and a plurality of the spring grooves are opened at the side end of the hollow mold sleeve, and a plurality of the springs are provided, and a plurality of the springs are fixedly connected between the inner walls of a plurality of the spring grooves, and a plurality of the springs are all sleeved on the circumferential surface of a plurality of sliding rods.

[0018] As a preferred solution 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 multiple sliding rods, and the sliding sleeve is located on one side of multiple forming 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 chassis. The other end of the second push-pull rod is rotatably connected to the first push-pull rod, and 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.

[0019] As a preferred solution of the present invention, the side end of the sliding sleeve is fixedly connected to two sealing interfaces, and cooling pipes are opened in the sliding sleeve, multiple mold frames and multiple molding modules, and both ends of the cooling pipes are connected to the two sealing interfaces.

[0020] A metal powder injection molding method comprises the following steps:

[0021] S1. Precision molding:

[0022] When metal powder is injection molded, the output end of the hydraulic cylinder is powered on to extend and push the hollow mold sleeve toward the first support block, so that the multiple molding modules fit the first support block, so that the cavity is sealed and docked with the nozzle of the heated injection molding machine. The nozzle of the heated injection molding machine injects the metal powder and binder mixture into the cavity at high temperature, and cools and solidifies the molten mixture in the cavity through two sealing interfaces. The cavity corresponding to the complex structure workpiece is divided by multiple molding modules, which reduces the difficulty of molding the complex structure workpiece and realizes the precise molding of the complex structure workpiece.

[0023] S2, quick demoulding:

[0024] After the complex structure workpiece in the cavity is cooled and formed, the output end of the hydraulic cylinder contracts and pulls the hollow mold sleeve to reset, multiple springs buffer the impact force generated by the hollow mold sleeve, and the hollow mold sleeve drives multiple mold frames to reset, and indirectly pulls multiple mold frames out from the inner wall of the sliding sleeve circumference, and then energizes and starts multiple servo motors, and the output ends of the multiple servo motors drive multiple worms to rotate, and the multiple worms drive multiple worm gears to rotate by meshing with multiple worm gears, and the multiple worm gears drive multiple deflection shafts to rotate, and the multiple deflection shafts drive multiple mold frames to rotate, and then the multiple mold frames rotate with the multiple deflection shafts as the rotating shafts, and the multiple mold frames drive multiple forming modules to be distributed in a circular manner, so that the cavity is split, which is convenient for taking out the complex structure workpiece in the cavity, and realizing the rapid demolding of the complex structure workpiece;

[0025] S3, close docking:

[0026] During precise molding, when the multiple mold frames approach the first support block, the multiple mold frames are inserted between the circumferential inner walls of the sliding sleeve, and the sliding sleeve is slowly sleeved on the circumferential surfaces of the multiple mold frames, so that the multiple mold frames are precisely docked toward the center, and the multiple molding modules are spliced ​​into an integral mold, so that the gaps between the multiple molding modules are reduced, and then the molten mixture in the cavity is prevented from overflowing from the gaps between the multiple molding modules, thereby avoiding burrs on the surface of the complex structure workpiece and achieving precise docking between the multiple molding modules;

[0027] S4. Replace module:

[0028] During the daily maintenance of the mold, the output end of the hydraulic cylinder contracts and pulls the hollow mold sleeve, and the multiple mold frames and multiple molding modules are completely pulled out from the inner wall of the sliding sleeve. The second push-pull rod limits the sliding sleeve to the side close to the first support block through the hinge between the second push-pull rod and the first push-pull rod. The hollow mold sleeve does not reset and stops between the sealing pad and the second support block. The multiple servo motors are powered on and started. The output ends of the multiple servo motors drive the multiple worms to rotate. The multiple worms drive the multiple worm gears to rotate by meshing with the multiple worm gears. The multiple worm gears drive the multiple deflection shafts to rotate. The multiple deflection shafts drive the multiple mold frames to rotate, and then the multiple mold frames rotate with the multiple deflection shafts as the rotating shafts. The multiple mold frames drive the multiple molding modules to be distributed in a circular manner, and then the electric push rod is powered on and started. The output end of the electric push rod extends to push the ratchet The pawl moves away from the ratchet, releasing the engagement between the pawl and the ratchet, and then releasing the lock of the shaft rotation, and finally powering on the stepper motor, the output end of the stepper motor drives the driving gear to rotate, and the driving gear drives the shaft, the turntable, the multiple mold frames and the multiple molding modules to rotate by meshing with the driven gear, so that the multiple molding modules are in a horizontal position on one side of the chassis one by one, which is convenient for taking out the multiple bolts from the multiple screw sleeves one by one, and then replacing the multiple molding modules in the multiple mold frames with the multiple molding modules of different cavities, and fixing the multiple molding modules of different cavities with bolts in the multiple mold frames, and then powering on the multiple servo motors to reset the multiple mold frames and the multiple molding modules of different cavities, the output end of the electric push rod contracts to pull the pawl to engage with the ratchet, lock the rotation of the shaft and the turntable, and finally form a replacement module for the multiple molding modules.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 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 the metal powder, and the adjustment mechanism is connected to the multiple mold frames to move the multiple molding modules. By splitting the molding mold, the volume and weight of a single molding mold after the split is reduced, thereby reducing the difficulty of daily maintenance of the molding mold.

[0031] In this solution, the electric push rod is deflected by the telescopic push-pull pawl at the output end. When the output end of the electric push rod is extended, the output end of the electric push rod pushes the pawl to deflect, so that the pawl is released from the engagement with the ratchet, thereby releasing the lock on the rotation of multiple molding modules. When the output end of the electric push rod is contracted, the output end of the electric push rod pulls the pawl to engage with the ratchet, restricting the rotation of the shaft rod, thereby locking the rotation of multiple molding modules. By extending and retracting the output end of the electric push rod and utilizing whether the ratchet and pawl rotate, the rotation of multiple molding modules and mold frames is controlled, so that multiple molding modules can be stopped one by one on one side of the chassis conveniently, and multiple molding modules can be disassembled and replaced one by one, which saves time and effort in replacing molding molds between the production of different workpieces, thereby improving the overall production efficiency of metal powder injection molding.

[0032] In this scheme, when deflecting multiple forming modules and mold frames, multiple servo motors are powered on and started, and the output ends of the multiple servo motors drive the multiple worms to rotate, and the multiple worms drive the multiple worm gears to rotate by meshing with the multiple worm gears, and the multiple worm gears drive the multiple deflection shafts to rotate, and the multiple deflection shafts drive the multiple mold frames to rotate, and then the multiple mold frames rotate with the multiple deflection shafts as the rotating shafts, and the multiple mold frames drive the multiple forming modules to be distributed in a circular manner, so that the cavity is split, which is convenient for taking out the complex structure workpiece in the cavity, realizing the rapid demolding of the complex structure workpiece, and improving the demolding efficiency of the metal powder injection molding device for the complex structure workpiece.

[0033] In this solution, when multiple forming modules are unfolded and docked, multiple sliders guide the deflection of multiple mold frames and forming modules by sliding with multiple arc-shaped slide grooves, thereby ensuring the precise offset of multiple forming modules and improving the processing accuracy of the metal powder injection molding device.

[0034] In this solution, during precise molding, when multiple mold frames approach the first support block, the multiple mold frames are inserted between the circumferential inner walls of the sliding sleeve, and the sliding sleeve is slowly sleeved on the circumferential surface of the multiple mold frames, so that the multiple mold frames are precisely docked toward the center, and the multiple molding modules are spliced ​​into an integral mold, so that the gaps between the multiple molding modules are reduced, and then the molten mixture in the cavity is prevented from overflowing from the gaps between the multiple molding modules, thereby avoiding burrs on the surface of complex structure workpieces, achieving precise docking between multiple molding modules, and improving the yield of complex structure workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 A first-view stereoscopic view of a metal powder injection molding device according to the present invention;

[0037] Figure 2 A second perspective stereoscopic diagram of a metal powder injection molding device according to the present invention;

[0038] Figure 3 A first half cross-sectional view of a metal powder injection molding device according to the present invention;

[0039] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0040] Figure 5 A three-dimensional diagram of an adjustment mechanism of a metal powder injection molding device according to the present invention;

[0041] Figure 6 It is a first half cross-sectional view of an adjustment mechanism of a metal powder injection molding device of the present invention;

[0042] Figure 7 It is a second half cross-sectional view of an adjustment mechanism of a metal powder injection molding device of the present invention;

[0043] Figure 8 It is a third half-section view of the adjustment mechanism of a metal powder injection molding device of the present invention;

[0044] Fig. 9 A metal powder injection molding device according to the present invention Figure 8 A magnified view of point B;

[0045] Fig.10 A fourth half-section view of an adjustment mechanism of a metal powder injection molding device according to the present invention;

[0046] Fig.11 A fifth half-section view of an adjustment mechanism of a metal powder injection molding device according to the present invention;

[0047] Fig.12 An exploded view of a first viewing angle adjustment mechanism of a metal powder injection molding device according to the present invention;

[0048] Fig.13 This is an exploded view of a second viewing angle adjustment mechanism of a metal powder injection molding device of the present invention.

[0049] In the figure: 1, chassis; 2, heating 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; 12, shaft rod; 13, turntable; 14, arc slide groove; 15, rotating hole; 16, deflection axis; 17, rotating frame; 18, worm; 19, worm wheel; 20, servo motor; 21, slider; 22, mold frame ; 23. Screw sleeve; 24. Forming module; 25. Cavity; 26. Rotating hole; 27. Driven gear; 28. Driving 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. Ratchet pawl; 37. Arc groove; 38. Electric push rod; 39. Second push-pull rod; 40. Air pressure drainage pipe; 41. Rotating cavity. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Reference Figure 1 - Fig.13 , a metal powder injection molding device, comprising:

[0052] Chassis 1;

[0053] A first support block 4, the first support block 4 is fixedly connected to the top of the chassis 1, the top of the chassis 1 is fixedly connected with a second support block 5, the second support block 5 is located on one side of the first support block 4, and a hollow mold sleeve 8 is provided between the first support block 4 and the second support block 5;

[0054] A mold frame 22, wherein a plurality of mold frames 22 are provided, and the plurality of mold frames 22 are provided between the first support block 4 and the second support block 5, and the plurality of mold frames 22 are located on one side of the hollow mold sleeve 8, and screw sleeves 23 are fixedly connected between the inner walls of the plurality of mold frames 22, and 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

[0055] The adjusting mechanism is disposed between the first supporting block 4 and the second supporting block 5 . The adjusting mechanism is connected to the plurality of mold frames 22 to move the plurality of molding modules 24 .

[0056] In the present invention, the chassis 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 driving component, the limit component and the swing component, the multiple mold frames 22 are used to accommodate the multiple molding modules 24, the multiple screw sleeves 23 are used to accommodate the multiple bolts, the multiple molding modules 24 are spliced ​​to form a cavity 25, the cavity 25 is used to shape the metal powder, the adjustment mechanism is connected to the multiple mold frames 22, and is used to move the multiple molding modules 24. By splitting the molding mold, the volume and weight of a single molding mold after splitting are reduced, thereby reducing the difficulty of daily maintenance of the molding mold.

[0057] The adjusting mechanism includes a driving assembly, a limiting assembly, a deflection assembly, a guiding assembly, a sleeve assembly and a sliding assembly. The driving assembly is arranged between the inner walls of the sleeve 7, and the driving assembly is connected to a plurality of molding modules 24. The limiting assembly is arranged between the inner walls of the sleeve 7, and the limiting assembly is connected to the driving assembly. The deflection assembly is arranged between the inner walls of the sleeve 7, and the deflection assembly is connected to a plurality of molding modules 24. The guiding assembly is provided with a plurality of groups, and a plurality of groups of guiding assemblies are connected to a plurality of molding modules 24. The sleeve assembly is arranged between the first support block 4 and the second support block 5, and the sleeve assembly corresponds to a plurality of molding modules 24. The sliding assembly is arranged between the first support block 4 and the second support block 5, and the sliding assembly is connected to the sleeve assembly and the hollow mold sleeve 8.

[0058] In the present invention, the driving assembly is used to provide torque for the rotation of multiple molding modules 24, the limiting assembly is used to limit the rotation of multiple molding modules 24, the deflection assembly is used to deflect the multiple molding modules 24, multiple groups of guide assemblies are used to deflect and guide multiple mold frames 22, the sleeve assembly is used to clamp the multiple mold frames 22 and the molding modules 24, and the sliding assembly is used to support the sliding of the sliding sleeve 7 and the hollow mold sleeve 8.

[0059] The driving assembly includes a partition 11, a shaft 12, a turntable 13, a rotating hole 26, a driven gear 27, a driving gear 28, a stepping motor 29 and a motor mounting hole 30. The rotating hole 26 is opened at the side end of the hollow mold sleeve 8, and the rotating hole 26 is connected to 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. The shaft 12 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 circumferential surface of the turntable 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 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 stepper motor 29 is fixedly connected in the motor mounting hole 30, and the output end of the stepper motor 29 extends to 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 stepper motor 29, and the driving gear 28 is meshed with the driven gear 27.

[0060] In the present invention, the partition 11 is used to divide the inner wall space of the hollow mold sleeve 8, the rotating hole 26 is used to accommodate the rotation of the turntable 13, the turntable 13 is used to support multiple deflection shafts 16, the shaft 12 rotates synchronously with the turntable 13, the driven gear 27 is used to drive the turntable 13 to rotate, the motor mounting hole 30 is used to accommodate the stepper motor 29, the stepper motor 29 is used to drive the driven gear 27 to rotate, and the driving gear 28 drives the driving gear 28 to rotate by meshing with the driven gear 27. During the rotation of the multiple mold frames 22 and the molding modules 24, the stepper motor 29 is powered on to start the stepper motor 29. The output end of 29 drives the driving gear 28 to rotate, and the driving gear 28 drives the driven gear 27 to rotate by meshing with the driven gear 27, and the driven gear 27 drives the turntable 13 to rotate, and the turntable 13 drives the shaft 12 and multiple deflection shafts 16 to rotate, and the deflection shaft 16 drives multiple mold frames 22 and forming modules 24 to rotate, so that the multiple mold frames 22 and the forming modules 24 are conveniently rotated to make the multiple mold frames 22 and the forming modules 24 located one by one on one side of the chassis 1, which is convenient for the staff to disassemble and replace the forming modules 24, and effectively reduce the maintenance difficulty of the metal powder injection molding device.

[0061] 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. 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, and 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.

[0062] In the present invention, the ratchet 35 rotates synchronously with the shaft 12, the pawl 36 meshes with the ratchet 35, and the arc groove 37 is used to accommodate the sliding of the output end of the electric push rod 38. The electric push rod 38 deflects by pushing and pulling the pawl 36 through the extension of the output end. When the output end of the electric push rod 38 is extended, the output end of the electric push rod 38 pushes the pawl 36 to deflect, so that the pawl 36 is released from the engagement with the ratchet 35, and then the locking of the rotation of the multiple molding modules 24 is released. When the output end of the electric push rod 38 is retracted, the output end of the electric push rod 38 is retracted. The output end pulls the pawl 36 to engage with the ratchet 35, limiting the rotation of the shaft 12, and then locking the rotation of the multiple forming modules 24. The output end of the electric push rod 38 is extended and retracted, and the rotation of the multiple forming modules 24 and the mold frame 22 is controlled by using whether the ratchet 35 and the pawl 36 rotate, so that the multiple forming modules 24 can be parked one by one on one side of the chassis 1, and the multiple forming modules 24 can be disassembled and replaced one by one, which saves time and effort in replacing the forming molds between the production of different workpieces, thereby improving the overall production efficiency of metal powder injection molding.

[0063] The deflection assembly includes a rotating cavity 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. The rotating cavity 41 is provided with a plurality of rotating cavities 41, and the plurality of rotating cavities 41 are opened in the rotating disk 13, and the plurality of rotating cavities 41 are distributed in a circumference. The rotating holes 15 are provided with a plurality of rotating holes 15, and the plurality of rotating holes 15 are opened at the side end of the rotating disk 13, and the plurality of rotating holes 15 are connected with the rotating cavity 41. The deflection shaft 16 is provided with a plurality of deflection shafts 16, and the plurality of deflection shafts 16 are rotatably connected between the circumferential inner walls of the plurality of rotating holes 15. One end of the plurality of deflection shafts 16 extends between the inner walls of the plurality of rotating cavities 41, and the other end of the plurality of deflection shafts 16 is connected to the plurality of mold frames 2 2 are 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 chamber 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 chambers 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.

[0064] In the present invention, a plurality of air pressure relief pipes 40 are provided in the turntable 13, the plurality of air pressure relief pipes 40 are connected with a plurality of rotating chambers 41, and the plurality of rotating chambers 41 are connected with the inner wall of the hollow mold sleeve 8, the plurality of rotating chambers 41 are used to accommodate a plurality of deflection shafts 16, a rotating frame 17, a worm 18, a worm wheel 19 and a servo motor 20, a plurality of rotating holes 15 are used to accommodate a plurality of deflection shafts 16, a plurality of deflection shafts 16 are used to support and fix a plurality of mold frames 22, a plurality of worm wheels 19 are used to drive a plurality of deflection shafts 16 to rotate, a plurality of rotating frames 17 are used to support a plurality of worms 18, a plurality of worms 18 drive a plurality of worm wheels 19 to rotate by engaging with a plurality of worm wheels 19, a plurality of servo motors 20 are used to drive a plurality of worms 18 to rotate, and a plurality of mold frames 22 are used to support a plurality of worms 18, a plurality of worms 18 drive a plurality of worm wheels 19 to rotate, and a plurality of mold frames 22 are used to support a plurality of worms 18, a plurality of worm wheels 19 ...8 drive a plurality of worm wheels 1 When the mold module 24 and the mold frame 22 are deflected, multiple servo motors 20 are powered on and started, and the output ends of the multiple servo motors 20 drive the multiple worms 18 to rotate. The multiple worms 18 drive the multiple worm wheels 19 to rotate by meshing with the multiple worm wheels 19. The multiple worm wheels 19 drive the multiple deflection shafts 16 to rotate. The multiple deflection shafts 16 drive the multiple mold frames 22 to rotate, and then the multiple mold frames 22 rotate with the multiple deflection shafts 16 as the rotating shafts. The multiple mold frames 22 drive the multiple molding modules 24 to be distributed in a circular manner, so that the mold cavity 25 is split, which is convenient for taking out the complex structure workpiece in the mold cavity 25, realizing rapid demolding of the complex structure workpiece, and improving the demolding efficiency of the metal powder injection molding device for the complex structure workpiece.

[0065] Each guide assembly includes an arcuate chute 14 and a slider 21 . The arcuate chute 14 is provided at the side end of the turntable 13 . The arcuate chute 14 is connected to the rotating cavity 41 . The slider 21 slides between the inner walls of the arcuate chute 14 . The slider 21 is connected to the mold frame 22 .

[0066] In the present invention, the arc-shaped slide groove 14 is opened 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 molding module 24 by sliding cooperation with the arc-shaped slide groove 14, thereby limiting the deflection angle of the molding module 24. When multiple molding modules 24 are unfolded and docked, multiple sliders 21 guide the deflection of multiple mold frames 22 and molding modules 24 by sliding cooperation with multiple arc-shaped slide grooves 14, thereby ensuring the precise offset of multiple molding modules 24 and improving the processing accuracy of the metal powder injection molding device.

[0067] The sliding assembly includes a sliding rod 6, a spring 9 and a spring groove 10. A plurality of sliding rods 6 are provided, and the plurality of sliding rods 6 are fixedly connected between the first support block 4 and the second support block 5. The plurality of sliding rods 6 penetrate the hollow mold sleeve 8. A plurality of spring grooves 10 are provided, and the plurality of spring grooves 10 are opened at the side end of the hollow mold sleeve 8. A plurality of springs 9 are provided, and the plurality of springs 9 are fixedly connected between the inner walls of the plurality of spring grooves 10, and the plurality of springs 9 are all sleeved on the circumferential surface of the plurality of sliding rods 6.

[0068] In the present invention, multiple sliding rods 6 are used to support the sliding of multiple hollow mold sleeves 8, multiple spring grooves 10 are used to accommodate multiple springs 9, and multiple springs 9 are used to buffer the impact of the hollow mold sleeve 8 on the second support block 5. When the hollow mold sleeve 8 moves parallel to each other and the hollow mold sleeve 8 is reset, the hollow mold sleeve 8 slides with the multiple sliding rods 6, and the hollow mold sleeve 8 pushes the multiple springs 9 to impact the second support block 5. The impact damage of the hollow mold sleeve 8 and the second support block 5 is buffered by the telescopic deformation of the multiple springs 9. At the same time, the multiple springs 9 block the collision damage of the stepping motor 29, the electric push rod 38 and the second support block 5.

[0069] The sleeve 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 sleeved on the circumferential surface of multiple sliding rods 6. The sliding sleeve 7 is located on one side of multiple 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.

[0070] In the present invention, the sleeve 7 is used to sleeve a plurality of mold frames 22 and a plurality of molding modules 24, the first push-pull rod 31 is used to limit the movement of the sleeve 7, the second push-pull rod 39 is used to pull the first push-pull rod 31, and the sealing gasket 34 is used to seal the gap between the turntable 13 and the rotating hole 26. During precise molding, when the plurality of mold frames 22 approach the first support block 4, the plurality of mold frames 22 are inserted between the circumferential inner walls of the sleeve 7, and the 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 docked 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 cavity 25 from overflowing from the gaps between the plurality of molding modules 24, thereby avoiding burrs on the surface of the workpiece with a complex structure, achieving precise docking between the plurality of molding modules 24, and improving the yield rate of the workpiece with a complex structure.

[0071] The side end of the sliding sleeve 7 is fixedly connected to two sealing interfaces 32 . A cooling pipeline 33 is provided in the sliding sleeve 7 , the plurality of mold frames 22 and the plurality of molding modules 24 . The two ends of the cooling pipeline 33 are connected to the two sealing interfaces 32 .

[0072] In the present invention, the two sealing 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.

[0073] A metal powder injection molding method comprises the following steps:

[0074] S1. Precision molding:

[0075] 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, so that the multiple molding modules 24 fit the first support block 4, so that the 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 the binder mixture into the cavity 25 at high temperature, and the cooling water flows unidirectionally into the cooling pipe 33 through the two sealing interfaces 32, and then the molten mixture in the cavity 25 is cooled and solidified, and the cavity 25 corresponding to the complex structure workpiece is divided by multiple molding modules 24, so as to reduce the difficulty of molding the complex structure workpiece and realize the precise molding of the complex structure workpiece;

[0076] S2, quick demoulding:

[0077] After the complex structure workpiece in the cavity 25 is cooled and formed, the output end of the hydraulic cylinder 3 contracts and pulls the hollow mold sleeve 8 for compounding, and the multiple springs 9 buffer the impact force generated by the hollow mold sleeve 8. The hollow mold sleeve 8 drives the multiple mold frames 22 to reset, and indirectly pulls the multiple mold frames 22 out from the circumferential inner wall of the sliding sleeve 7, and then the multiple servo motors 20 are powered on and started. The output ends of the multiple servo motors 20 drive the multiple worms 18 to rotate, and the multiple worms 18 drive the multiple worm wheels 19 to rotate by meshing with the multiple worm gears 19. The multiple worm gears 19 drive the multiple deflection shafts 16 to rotate, and the multiple deflection shafts 16 drive the multiple mold frames 22 to rotate, and then the multiple mold frames 22 rotate with the multiple deflection shafts 16 as the rotating shafts. The multiple mold frames 22 drive the multiple forming modules 24 to spread out in a circular distribution, so that the cavity 25 is split, which is convenient for taking out the complex structure workpiece in the cavity 25, and realizing the rapid demolding of the complex structure workpiece;

[0078] S3, close docking:

[0079] During precise molding, when the multiple mold frames 22 approach the first support block 4, the multiple 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 multiple mold frames 22, so that the multiple mold frames 22 are precisely docked toward the center, and the multiple molding modules 24 are spliced ​​into an integral mold, so that the gaps between the multiple molding modules 24 are reduced, and then the molten state mixture in the cavity 25 is prevented from overflowing from the gaps between the multiple molding modules 24, thereby avoiding burrs on the surface of the complex structure workpiece and achieving precise docking between the multiple molding modules 24;

[0080] S4. Replace module:

[0081] During the routine maintenance of the mold, the output end of the hydraulic cylinder 3 contracts and pulls the hollow mold sleeve 8, and 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 limits the sliding sleeve 7 to the side close to the first support block 4 through the hinge between the first push-pull rod 31. 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 worms 18 to rotate. The multiple worms 18 drive the multiple worm wheels 19 to rotate by meshing with the multiple worm wheels 19. The multiple worm wheels 19 drive the multiple deflection shafts 16 to rotate. The multiple deflection shafts 16 drive the multiple mold frames 22 to rotate, and then the multiple mold frames 22 rotate with the multiple deflection shafts 16 as the rotating shafts. The multiple mold frames 22 drive the multiple molding modules 24 to be distributed in a circular manner, and then the electric push rod 38 is powered on and started. The output end of the electric push rod 38 extends to push the pawl 36 away from the ratchet 35 , release the engagement between the pawl 36 and the ratchet wheel 35, and then release the lock of the rotation of the shaft 12, and finally power on the stepper motor 29, the output end of the stepper motor 29 drives the driving gear 28 to rotate, and the driving gear 28 drives the shaft 12, the turntable 13, the multiple mold frames 22 and the multiple forming modules 24 to rotate through the engagement with the driven gear 27, so that the multiple forming modules 24 are in a horizontal position on one side of the chassis 1 one by one, so that the multiple bolts can be spirally taken out from 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, and multiple molding modules 24 with different cavities 25 are bolted into multiple mold frames 22. Then, multiple servo motors 20 are powered on to start resetting multiple mold frames 22 and multiple molding modules 24 with different cavities 25. The output end of the electric push rod 38 contracts and pulls the pawl 36 to engage with the ratchet 35, locking the rotation of the shaft 12 and the turntable 13, and finally forming a replacement module for multiple molding modules 24 in pairs.

[0082] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in 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 adjusting mechanism, the adjusting mechanism being arranged between the first supporting block (4) and the second supporting block (5), the adjusting mechanism being connected to the plurality of mold frames (22) and being used to move the plurality of molding modules (24); 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). 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 (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), and the driving gear (28) is meshed with the driven gear (27); 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); 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); 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 rotating disk (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); The sliding assembly comprises a sliding rod (6), a spring (9) and a spring groove (10), wherein 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), and the plurality of the sliding rods (6) penetrate the hollow mold sleeve (8), and 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), and 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); 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).

2. A metal powder injection molding device according to claim 1, 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).

3. A metal powder injection molding method, characterized in that: A metal powder injection molding device as described in claim 2 comprises 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.

Images