Ceramic part powder injection molding mold based on CIM and process

Abstract

The application relates to the field of ceramic part injection molding, and particularly discloses a CIM-based ceramic part powder injection molding die and process, which solves the problems of existing ceramic part injection molding die switching troubles and low production efficiency, and the following scheme is proposed, which comprises a base, an injection molding machine, a sleeve ring, a front disc, a rear disc, a T-shaped pipe, a rough injection molding head, a straight pipe, a fine injection molding head, a sleeve joint, a driving assembly, a sliding frame, a rotating disc cylinder, a lower die base, an upper die base, an injection molding port and a telescopic part one, rotating plates are rotationally connected between the lower side output ends of the telescopic part one and the two sleeve rings, a die switching assembly is arranged on the sleeve ring, the die switching assembly is used for driving and switching each lower die base arranged in an array on the rotating disc cylinder, a linkage assembly is further arranged on the sliding frame, and the linkage assembly is used for driving the sliding frame to slide to one side when the front disc and the rear disc rotate. The device can flexibly switch multiple dies, and realizes efficient injection molding processing and production of various ceramic parts.

Description

Technical Field

[0001] This invention relates to the field of ceramic parts injection molding, and in particular to a CIM-based powder injection molding mold and process for ceramic parts. Background Technology

[0002] Ceramic Injection Molding (CIM) is a precision ceramic manufacturing method that combines traditional powder metallurgy technology with plastic injection molding. Its core involves mixing a high proportion (typically 50-65 vol.%) of ceramic powder with a thermoplastic binder system to create a uniform feedstock. This feedstock is then injected into a mold cavity using an injection molding machine to form a green body with a precise shape. Subsequent processing, such as debinding and sintering, yields a dense ceramic part.

[0003] In specific molding processes, various molds with different configurations are typically connected to the injection head of an injection molding machine to inject molten material from the machine into the mold for cooling and molding. However, this injection method suffers from difficulties in adjusting injection efficiency, resulting in slow injection efficiency when molding large parts, which affects overall molding efficiency. Furthermore, switching between molds for different parts primarily relies on disassembly and reassembly, further reducing molding efficiency. Therefore, this paper proposes a CIM-based powder injection molding mold and process for ceramic parts. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a CIM-based powder injection molding die and process for ceramic parts, which can flexibly switch injection molding for different ceramic parts and effectively improve injection molding efficiency.

[0005] To solve the above-mentioned technical problems, the basic technical solution proposed by this invention is as follows:

[0006] A CIM-based powder injection molding die for ceramic parts includes a base on which an injection molding machine is mounted. Two collars are slidably arranged coaxially on the base, and a front disc and a rear disc are rotatably fitted inside the two collars respectively. A T-shaped tube is connected through the rear disc, and the front end of the T-shaped tube passes through the center of the front disc to the front side of the front disc. A coarse injection head is connected to the front extension end of the front disc. Straight tubes are radially symmetrically connected through both sides of the rear disc, and the straight tubes pass through the front disc to the front side of the front disc. A fine injection head is connected to the front extension end of the front disc. Both the T-shaped tube and the straight tube extend to the rear side of the rear disc and are connected to a socket joint that mates with the injection molding machine. A drive assembly for driving the front and rear discs to rotate synchronously is provided on the collars.

[0007] A sliding frame is slidably mounted on the base. A turntable cylinder is symmetrically rotatably connected to both sides of the sliding frame. Lower mold bases are arrayed on the upper end face of the turntable cylinder. An upper mold base is slidably connected above each lower mold base. An injection port for docking with a coarse or fine injection head is connected to the lower mold base. A telescopic component is mounted on the base. A rotating plate is rotatably connected between the lower output end of the telescopic component and two collars. A mold switching component is provided on the collars. The mold switching component is used to drive and switch the lower mold bases arrayed on the turntable cylinder. A linkage component is also provided on the sliding frame. The linkage component is used to drive the sliding frame to slide to one side when the front and rear discs rotate.

[0008] The mold switching assembly includes a ratchet, a slide, a limiting slide groove, and a ratchet. The ratchet is fitted on the outer side of the lower end of the turntable cylinder. The slide is slidably mounted on the side plates connected to both sides of the front disc, and the slide is located between the ratchets on both sides of the turntable cylinder. The limiting slide groove is symmetrically opened on both sides of the slide. The ratchet is slidably connected in the limiting slide groove, and the other end extends to the outer side of the limiting slide groove and engages with the ratchet. A spring is connected between one end of the ratchet in the limiting slide groove and the inner wall of the limiting slide groove.

[0009] The linkage component includes a toothed ring II and a toothed plate. Each toothed ring II is fitted on the outside of the front or rear disc. The toothed plate is connected to the slide frame. The toothed plate is engaged with the toothed ring II, and the toothed ring II slides on the toothed plate.

[0010] Preferably, the front end of the injection molding machine is connected to a conveying pipe, which is set in pairs and is respectively connected to two sleeves of T-shaped pipe on the rear side of the rear disc for fitting and ferrule, or respectively connected to two straight pipes on the rear side of the rear disc for fitting and ferrule. The two sides of the base are also connected to slide rod frames three, and the slide frame is slidably sleeved on the outside of the slide rod frame three.

[0011] Preferably, each of the collars is connected to a side plate on both sides, and the base is connected to a slide rod frame on both sides. Each side plate is slidably sleeved on the outside of the slide rod frame on its respective side. A limiting seat is centrally fitted on the outside of the slide rod frame. A spring sleeved on the outside of the slide rod frame is connected between the limiting seat and the side plates on the front and rear sides.

[0012] Preferably, the lower end of the turntable cylinder is connected to a rotating ring, and is rotatably connected to the slide frame through the rotating ring. Each lower mold base is connected to a guide rod frame on both sides. The upper mold base is slidably sleeved on the outside of the guide rod frame on both sides. A spring second sleeved on the outside of the guide rod frame is connected between the upper mold base and the turntable cylinder.

[0013] Preferably, each of the turntable cylinders is fitted with a mounting seat connected to the slide frame. The mounting seats on both sides extend above the upper mold base on the side of the turntable cylinders that are close to each other, and a telescopic component three is installed at the extended end. The lower output end of the telescopic component three is connected to a top plate that abuts against the upper side of the upper mold base.

[0014] Preferably, the drive assembly includes a gear ring, a servo motor, and a gear. The servo motor is installed inside the ring and arranged in an array on the inner wall of the ring. The gear is installed at the output end of the servo motor. The gear ring is fitted onto the outer side of the front or rear disc, and the gear meshes with the gear ring.

[0015] Preferably, each of the two side plates of the front disc is connected to a slide rod bracket 2. Each slide rod bracket 2 is slidably fitted with a slide seat on its outer side. The two rear ends of the slide rod bracket are respectively connected to the slide seats on both sides and slide on the side plates through the slide seats. The ratchet wheels on both sides of the turntable cylinder are also connected to a limiting slide frame on the side away from each other. A ratchet block is slidably fitted in the limiting slide frame. One end of the ratchet block extends to the outer side of the limiting slide frame and engages with the ratchet wheel, while the other end slides in the limiting slide frame and is connected to the inner wall of the limiting slide frame by a spring 4.

[0016] A CIM-based powder injection molding process for ceramic parts includes the following steps:

[0017] Step 1: Add ceramic feedstock into the injection molding machine, and then select the corresponding target mold according to the ceramic parts to be injected;

[0018] Step 2: When the injection-molded ceramic part is a large single piece, control the telescopic component to retract, and pull the front and rear discs closer to each other through the rotating plate, so that the socket is separated from the injection molding machine, and the rough injection head is separated from the injection port.

[0019] Step 3: As the front and rear discs in Step 2 approach each other, the slide will be pulled backward, which will then drive the two turntable cylinders to rotate through the mold switching component. Through multiple reciprocating controls, the two turntable cylinders will rotate multiple times until the target mold is rotated to the side where the two turntable cylinders approach each other.

[0020] Step 4: Control the drive assembly to rotate the front and rear discs, and the linkage assembly to slide the slide frame, so that the turntable cylinder with the target mold slides towards the middle of the base until the injection port on the lower mold base of the target mold is coaxial with the rough injection head. Then, drive the front and rear discs to move away from each other again, so that the socket is fitted with the injection molding machine, and at the same time the rough injection head is fitted with the injection port, and injection molding can be performed.

[0021] Step 5: When the injection-molded ceramic parts are small in volume or two sets, select the corresponding target molds on the two turntable cylinders through Step 2-3, control the drive component to drive the front and rear discs to rotate, and control the sliding frame to be directly below the front and rear discs through the linkage component. At this time, the two turntable cylinders are close to each other. The injection port on the lower mold base of one side of the target mold is coaxial with the fine injection head on both sides.

[0022] Step Six: Move the front and rear discs away from each other so that the socket engages with the injection molding machine, and at the same time, the rough injection head engages with the injection port, and injection molding can then be performed.

[0023] The beneficial effects of this invention are:

[0024] 1. The technical solution of the present invention controls the rotation of the front and rear discs by driving the component, so that the sliding frame is directly below the two discs. The telescopic component can then drive the front and rear discs to move away from each other, so that the fine injection heads on both sides can connect with the injection ports on the corresponding lower mold base, thereby achieving synchronous injection molding on both sides. This can improve the molding efficiency of injection molding. At the same time, when producing a pair of ceramic parts, they can also be produced synchronously in pairs.

[0025] 2. The technical solution of the present invention uses a telescopic component to drive the front and rear discs to move closer together, which can pull the slide frame to slide between the two turntable cylinders. Then, through the cooperation of the ratchet and ratchet, the two turntable cylinders are driven to rotate 90° synchronously at one time, so as to switch the lower mold base and the upper mold base on the side where the two turntable cylinders are closer together. This achieves flexible and efficient switching between different molds. When the front and rear discs on both sides move closer together, the fine injection head can be separated from the injection port first, and then the turntable cylinder can be driven to rotate. This makes the turntable cylinder rotated, and the switching between different molds can be flexible and smooth.

[0026] 3. The technical solution of the present invention, when the front and rear discs approach each other, controls the drive assembly to drive them to rotate, which in turn drives the slide frame to slide to one side, thereby driving one set of the lower mold base and upper mold base on one side of the two turntable cylinders to be coaxially aligned with the coarse injection port. This allows for the selection of a lower mold base with a large volume cavity and the docking of its upper injection port with the coarse injection head, realizing efficient injection molding of large-volume ceramic parts. This not only improves the flexibility of injection molding of ceramic parts, but also improves processing efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the baseless invention and the injection molding machine;

[0029] Figure 3This is a side sectional view of the baseless structure of the present invention and the injection molding machine;

[0030] Figure 4 This is a top sectional view of the baseless structure of the present invention and the injection molding machine;

[0031] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0032] Figure 6 This is a schematic diagram of the relevant structure between the front and rear disks of the present invention;

[0033] Figure 7 This is a schematic diagram of the relevant structures on the sliding frame of the present invention;

[0034] Figure 8 This is a schematic diagram of the relevant structures on the turntable cylinder of the present invention;

[0035] Figure 9 This is a schematic diagram of the sliding frame structure of the present invention;

[0036] Figure 10 This is a top sectional view of the sliding frame of the present invention;

[0037] Figure 11 This is a schematic diagram of the limiting slide frame of the present invention;

[0038] Figure 12 This is a top view of the limiting slide frame of the present invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Base; 2. Injection molding machine; 3. Conveyor pipe; 5. Front disc; 6. Rear disc; 7. T-shaped pipe; 8. Coarse injection head; 9. Straight pipe; 10. Fine injection head; 11. Socket joint; 12. Slide bar bracket one; 13. Side plate; 14. Limiting seat; 15. Spring one; 16. Gear ring one; 17. Collar; 18. Servo motor; 19. Gear; 20. Gear ring two; 21. Slide bar bracket two; 22. Telescopic component one; 23. Turning plate 24. Slide Bar Frame 3; 25. Slide Frame; 26. Tooth Plate; 27. Mounting Base; 28. Telescopic Part 3; 29. ​​Top Plate; 30. Turntable Cylinder; 31. Lower Mold Base; 32. Guide Rod Frame 1; 33. Upper Mold Base; 34. Spring 2; 35. Injection Port; 36. Ratchet; 37. Slide Block; 38. Slide Carrier; 39. Limiting Slide Groove; 40. Ratchet; 41. Spring 3; 42. Limiting Slide Frame; 43. Ratchet Block; 44. Spring 4. Detailed Implementation

[0041] The following will be combined with the appendix Figure 1 To be continued Figure 8The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] like Figure 1-12 As shown, this invention discloses a CIM-based ceramic part powder injection molding mold, including a base 1, an injection molding machine 2 mounted on the base 1, two collars 17 coaxially slidingly disposed on the base 1, and a front disc 5 and a rear disc 6 rotatably mounted in the two collars 17 respectively, a T-shaped tube 7 is connected through the rear disc 6, and the front end of the T-shaped tube 7 passes through the center of the front disc 5 to the front side of the front disc 5, and a coarse injection head 8 is connected to the front extension end of the front disc 5, and straight tubes 9 are radially symmetrically connected through both sides of the rear disc 6, and the straight tubes 9 pass through the front disc 5 to the front side of the front disc 5, and a fine injection head 10 is connected to the front extension end of the front disc 5, the T-shaped tube 7 and the straight tube 9 both extend to the rear side of the rear disc 6, and are connected to a socket joint 11 that docks with the injection molding machine 2, and a drive component for driving the front disc 5 and the rear disc 6 to rotate synchronously is provided on the collars 17;

[0044] Among them, the injection molding machine 2 adopts existing equipment, and both the T-shaped tube 7 and the straight tube 9 are made of high temperature resistant stainless steel hoses with a certain redundant length to facilitate the relative sliding of the front disc 5 and the rear disc 6.

[0045] A sliding frame 25 is slidably mounted on the base 1. A turntable cylinder 30 is symmetrically rotatably connected to both sides of the sliding frame 25. Lower mold bases 31 are arrayed on the upper end face of the turntable cylinder 30. An upper mold base 33 is slidably connected above each lower mold base 31. An injection port 35 is connected to the lower mold base 31 to dock with the coarse injection head 8 or the fine injection head 10. A telescopic component 22 is mounted on the base 1. A rotating plate 23 is rotatably connected between the lower output end of the telescopic component 22 and two collars 17. A mold switching component is provided on the collars 17. The mold switching component is used to drive the switching of each lower mold base 31 arrayed on the turntable cylinder 30. A linkage component is also provided on the sliding frame 25. The linkage component is used to drive the sliding frame 25 to slide to one side when the front disc 5 and the rear disc 6 rotate.

[0046] The front end of the injection molding machine 2 is connected to a conveying pipe 3. The conveying pipe 3 is set in pairs and is respectively connected to two sleeves 11 on the rear side of the rear disc 6 of the T-shaped pipe 7, or respectively connected to two straight pipes 9 on the rear side of the rear disc 6 of the sleeves 11. The two sides of the base 1 are also connected to the slide rod frame 3 24. The slide frame 25 is slidably sleeved on the outside of the slide rod frame 3 24. Among them, the sleeves 11 and the conveying pipe 3, the coarse injection head 8 and the injection port 35, and the fine injection head 10 and the injection port 35 are all provided with sealing structures. The sealing structures adopt the existing sealing structures in hot injection molding to ensure that no leakage occurs during the injection process.

[0047] Each collar 17 has a side plate 13 connected to both sides, and a slide rod frame 12 is connected to both sides of the base 1. Each side plate 13 is slidably sleeved on the outside of the slide rod frame 12 on its respective side. A limiting seat 14 is centrally sleeved on the outside of the slide rod frame 12. A spring 15 sleeved on the outside of the slide rod frame 12 is connected between the limiting seat 14 and the side plates 13 on both sides. This allows the front disc 5 and the rear disc 6 to rotate in their respective collars 17 under the control of the drive assembly. At the same time, the collar 17 can also slide on the outside of the slide rod frame 12 through the side plates 13 connected to its two sides. The extension and retraction of the telescopic component 22 pulls the rotating plate 23 to rotate, which can drive the front disc 5 and the rear disc 6 to slide away from each other or towards each other. When they approach each other, the spring 15 can be compressed. When they move away from each other, they can move away quickly under the push of the rotating plate 23 and the elastic force of the springs 15 on both sides.

[0048] The lower end of the turntable cylinder 30 is connected to a rotating ring, which is rotatably connected to the slide frame 25. Each lower mold base 31 has a guide rod frame 32 connected to both sides. The upper mold base 33 is slidably sleeved on the outside of the guide rod frame 32. A spring 34 sleeved on the outside of the guide rod frame 32 is connected between the upper mold base 33 and the turntable cylinder 30. The outer side of the rotating ring is rotatably connected to the slide frame 25 through a bearing. The guide rod frame 32 can stabilize the up and down sliding of the upper mold base 33 and keep the upper mold base 33 always directly above the lower mold base 31. Under the action of the spring 34, the upper mold base 33 can slide up away from the lower mold base 31, so that the upper mold base 33 and the lower mold base 31 are separated and opened.

[0049] Each turntable cylinder 30 is fitted with a mounting base 27 connected to the slide frame 25. The mounting bases 27 on both sides extend above the upper mold base 33 on the side of the turntable cylinders 30 that are close to each other. A telescopic component 28 is installed at the extended end. The lower output end of the telescopic component 28 is connected to a top plate 29 that cooperates and abuts against the upper side of the upper mold base 33.

[0050] The lower end of the mounting base 27 is shaped like a pivot and passes through the center of the turntable cylinder 30. Its lower end is connected to the slide frame 25 via a bearing and a rotating ring. This connection does not obstruct the rotation of the turntable cylinder 30. The mounting bases 27 on both sides are close to each other and are located above the upper mold bases 33 on both sides of the turntable cylinder 30. When the turntable cylinder 30 rotates, it can drive the upper mold bases 33 and lower mold bases 31 with different mold cavities to be directly below the top platen 29. During injection molding, the top platen 29 is driven to move downward by the telescopic component 28 and abut against the upper mold base 33, causing it to move downward and cover the lower mold base 31. During this process, the spring 24 is compressed, so that when the top platen 29 is driven upward after injection molding, the upper mold base 33 can automatically open under the elastic force of the spring 24.

[0051] Example 2

[0052] like Figure 1-12 As shown, this invention discloses a CIM-based powder injection molding mold and process for ceramic parts. Compared with Embodiment 1, this embodiment discloses the structure of the drive component.

[0053] The drive assembly includes a gear ring 16, a servo motor 18, and a gear 19. The servo motor 18 is installed inside a collar 17 and arranged in an array on the inner wall of the collar 17. The gear 19 is installed at the output end of the servo motor 18. The gear ring 16 is fitted onto the outer side of the front disc 5 or the rear disc 6, and the gear 19 meshes with the gear ring 16.

[0054] By starting the servo motor 18, the gear 19 can be driven to rotate, which in turn drives the gear ring 16 to rotate with the front disk 5 and the rear disk 6 through meshing connection.

[0055] Example 3

[0056] like Figure 1-12 As shown, this invention discloses a CIM-based powder injection molding mold and process for ceramic parts. Compared with Embodiment 2, this embodiment discloses the structure of the mold switching component.

[0057] The mold switching assembly includes a ratchet 36, a slide 38, a limiting slide groove 39, and a ratchet 40. The ratchet 36 is fitted on the outer side of the lower end of the turntable cylinder 30. The slide 38 is slidably mounted on the side plates 13 connected to both sides of the front disc 5, and the slide 38 is located between the ratchet 36 on both sides of the turntable cylinder 30. The limiting slide groove 39 is symmetrically opened on both sides of the slide 38. The ratchet 40 is slidably connected to the limiting slide groove 39, and the other end extends to the outer side of the limiting slide groove 39 and engages with the ratchet 36. A spring 41 is connected between one end of the ratchet 40 in the limiting slide groove 39 and the inner wall of the limiting slide groove 39.

[0058] When the telescopic component 22 retracts and pulls the rotating plates 23 on both sides of its output end to rotate, causing the front disc 5 and the rear disc 6 to slide closer to each other, it can also simultaneously pull the slide 38 to slide backward between the rotating cylinders 30 on both sides. During the backward movement of the slide 38, the ratchet 40 sliding in its inner limiting groove 39 does not engage with the ratchet 36 at first. That is, the slide 38 slides at one end first to ensure that the fine injection head 10 on both sides or the coarse injection head 8 in the middle separates from the injection port 35 on the corresponding lower mold base 31 before the ratchet 40 engages with the ratchet 36. When the two rotating cylinders 30 are combined, they can rotate 90° at a time, allowing for the switching of different combinations of lower mold base 31 and upper mold base 33. When the front disc 5 and the rear disc 6 move closer and further apart, the ratchet 40 will be pushed into the limiting groove 39 by the ratchet 36, compressing the spring 3 41. After the ratchet 40 moves forward and completely passes the ratchet 36, it will return to its original position under the action of the spring 3 41, facilitating the next or multiple consecutive switching operations, improving the flexibility of switching between different molds, and also improving production efficiency.

[0059] A slide bar bracket 21 is connected to each side plate 13 on both sides of the front disc 5. A slide seat 37 is slidably fitted on the outer side of each slide bar bracket 21. The rear ends of the slide bar 38 are connected to the slide seats 37 on both sides respectively, and slide on the side plate 13 through the slide seats 37. The ratchet 36 on both sides of the turntable cylinder 30 is also connected to a limiting slide frame 42 on one side away from each other. A ratchet block 43 is slidably fitted inside the limiting slide frame 42. One end of the ratchet block 43 extends to the outer side of the limiting slide frame 42 and engages with the ratchet 36, while the other end slides inside the limiting slide frame 42 and is connected to the inner wall of the limiting slide frame 42 by a spring 44.

[0060] This makes the sliding of the carriage 38 on the side plate 13 more stable. At the same time, through the action of the ratchet block 43 and the ratchet 36, the unidirectional rotation of the ratchet 36 and the turntable cylinder 30 can be guaranteed. When the carriage 38 drives the ratchet 40 to move forward, the ratchet block 43 can limit the ratchet 36, keep the turntable cylinder 30 stable, and prevent it from rotating back and causing errors.

[0061] Example 4

[0062] like Figure 1-12 As shown, this invention discloses a CIM-based powder injection molding mold and process for ceramic parts. Compared with Embodiment 3, this embodiment discloses the structure of the linkage component.

[0063] The linkage assembly includes a second toothed ring 20 and a toothed plate 26. Each second toothed ring 20 is fitted on the outside of the front disc 5 or the rear disc 6. The toothed plate 26 is connected to the slide frame 25. The toothed plate 26 is meshed with the second toothed ring 20, and the second toothed ring 20 slides on the toothed plate 26.

[0064] By setting up the linkage components, the sliding frame 25 can be controlled to be directly below the front disk 5 and the rear disk 6 through the drive components, and the sliding frame 25 can also be controlled to slide to one side of the two. In the specific injection molding process, when the sliding frame 25 is directly below the front disk 5 and the rear disk 6, it is convenient to make the two fine injection heads 10 on both sides coaxially connected with the injection ports 35 of the lower mold base 31 on both sides of the rotary cylinder 30 that are close to each other, so as to produce two ceramic parts at the same time, or a set of paired ceramic parts.

[0065] When the slide frame 25 slides to one side of the front disc 5 and the rear disc 6, the injection port 35 of the lower mold base 31 on one side of the turntable cylinder 30 can be aligned with the coarse injection head 8, which facilitates efficient injection molding of large-volume ceramic parts through high-flow injection molding and improves the production efficiency of injection molding.

[0066] Example 5

[0067] like Figure 1-12 As shown, this invention discloses a CIM-based powder injection molding process for ceramic parts, comprising the following steps:

[0068] Step 1: Add ceramic feedstock into injection molding machine 2, and then select the corresponding target mold according to the ceramic parts to be injected;

[0069] Step 2: When the injection-molded ceramic part is a large single piece, control the telescopic component 22 to retract, and pull the front disc 5 and the rear disc 6 closer to each other through the rotating plate 23, so that the socket 11 is separated from the injection molding machine 2, and at the same time the rough injection head 8 is separated from the injection port 35.

[0070] Step 3: As the front disc 5 and the rear disc 6 approach each other in Step 2, the slide 38 will be pulled backward, which will then drive the two turntable cylinders 30 to rotate through the mold switching component. Through multiple reciprocating controls, the two turntable cylinders 30 will rotate multiple times until the target mold is rotated to the side where the two turntable cylinders 3 are close to each other.

[0071] Step 4: Control the drive assembly to rotate the front disc 5 and the rear disc 6, and the linkage assembly to drive the slide frame 25 to slide, so that the turntable cylinder 30 with the target mold slides towards the middle of the base 1 until the injection port 35 on the lower mold base 31 of the target mold is coaxial with the coarse injection head 8. Then, drive the front disc 5 and the rear disc 6 to move away from each other again, so that the socket 11 is fitted with the injection molding machine 2, and at the same time the coarse injection head 8 is fitted with the injection port 35, and injection molding can be performed.

[0072] Step 5: When the injection-molded ceramic part is small in volume or two parts are in a set, select the corresponding target mold on the two turntable cylinders 30 through Step 2-Step 3, control the drive component to drive the front disc 5 and the rear disc 6 to rotate, and control the sliding frame 25 to be directly below the front disc 5 and the rear disc 6 through the linkage component. At this time, the two turntable cylinders 30 are close to each other. The injection port 35 on the lower mold base 31 of the target mold on one side is coaxial with the fine injection head 10 on both sides.

[0073] Step 6: Move the front disc 5 and the rear disc 6 away from each other, so that the socket 11 is engaged with the injection molding machine 2, and at the same time the rough injection head 8 is engaged with the injection port 35, and injection molding can be performed.

[0074] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A CIM-based powder injection molding die for ceramic parts, comprising a base (1), an injection molding machine (2) mounted on the base (1), and two collars (17) coaxially slidingly disposed on the base (1), wherein a front disc (5) and a rear disc (6) are respectively rotatably fitted inside the two collars (17), characterized in that, A T-shaped tube (7) is connected through the rear disc (6), and the front end of the T-shaped tube (7) passes through the center of the front disc (5) to the front side of the front disc (5), and a coarse injection head (8) is connected to the front extension end of the front disc (5). Straight tubes (9) are connected radially symmetrically through both sides of the rear disc (6), and the straight tubes (9) pass through the front disc (5) to the front side of the front disc (5), and a fine injection head (10) is connected to the front extension end of the front disc (5). The T-shaped tube (7) and the straight tube (9) both extend to the rear side of the rear disc (6) and are connected to a socket joint (11) that docks with the injection molding machine (2). A drive assembly for driving the front disc (5) and the rear disc (6) to rotate synchronously is provided on the collar (17). A sliding frame (25) is slidably provided on the base (1). A turntable cylinder (30) is symmetrically rotatably connected to both sides of the sliding frame (25). A lower mold base (31) is arrayed on the upper end face of the turntable cylinder (30). An upper mold base (33) is slidably connected above each lower mold base (31). An injection port (35) is connected to the lower mold base (31) to dock with a coarse injection head (8) or a fine injection head (10). A telescopic component is installed on the base (1). 22), and the lower output end of the telescopic component (22) is rotatably connected to the two collars (17) with a rotating plate (23). The collar (17) is provided with a mold switching component. The mold switching component is used to drive and switch the various lower mold bases (31) installed in the array on the turntable cylinder (30). The sliding frame (25) is also provided with a linkage component. The linkage component is used to drive the sliding frame (25) to slide to one side when the front disc (5) and the rear disc (6) rotate. The mold switching assembly includes a ratchet (36), a slide (38), a limiting groove (39), and a ratchet (40). The ratchet (36) is fitted on the outer side of the lower end of the turntable cylinder (30). The slide (38) is slidably mounted on the side plates (13) connected to both sides of the front disc (5), and the slide (38) is located between the ratchet (36) on both sides of the turntable cylinder (30). The limiting groove (39) is symmetrically opened on both sides of the slide (38). The ratchet (40) is slidably connected to the limiting groove (39), and the other end extends to the outer side of the limiting groove (39) and engages with the ratchet (36). A spring (41) is connected between one end of the ratchet (40) in the limiting groove (39) and the inner wall of the limiting groove (39). The linkage component includes a toothed ring (20) and a toothed plate (26). Each toothed ring (20) is fitted on the outside of the front disc (5) or the rear disc (6). The toothed plate (26) is connected to the slide frame (25). The toothed plate (26) is meshed with the toothed ring (20), and the toothed ring (20) slides on the toothed plate (26).

2. The CIM-based powder injection molding die for ceramic parts according to claim 1, characterized in that, The front end of the injection molding machine (2) is connected to a conveying pipe (3). The conveying pipe (3) is set in pairs and is respectively connected to the two sleeves (11) of the T-shaped pipe (7) on the rear side of the rear disc (6) for fitting, or respectively connected to the two straight pipes (9) on the rear side of the rear disc (6) for fitting. The two sides of the base (1) are also connected to the slide rod frame three (24), and the slide frame (25) is slidably sleeved on the outside of the slide rod frame three (24).

3. The CIM-based powder injection molding die for ceramic parts according to claim 1, characterized in that, Each of the collars (17) is connected to a side plate (13) on both sides, and the base (1) is connected to a slide rod frame (12) on both sides. Each of the side plates (13) is slidably sleeved on the outside of the slide rod frame (12) on its respective side. A limiting seat (14) is fitted in the center of the outside of the slide rod frame (12). A spring (15) sleeved on the outside of the slide rod frame (12) is connected between the limiting seat (14) and the side plates (13) on the front and rear sides.

4. The CIM-based powder injection molding die for ceramic parts according to claim 1, characterized in that, The lower end of the turntable cylinder (30) is connected to a rotating ring, which is rotatably connected to the slide frame (25). Each lower mold base (31) is connected to a guide rod frame (32) on both sides. The upper mold base (33) is slidably sleeved on the outside of the guide rod frame (32) on both sides. A spring (34) sleeved on the outside of the guide rod frame (32) is connected between the upper mold base (33) and the turntable cylinder (30).

5. A CIM-based powder injection molding die for ceramic parts according to claim 3, characterized in that, Each of the turntable cylinders (30) is fitted with a mounting base (27) connected to the slide frame (25). The mounting bases (27) on both sides extend above the upper mold base (33) on the side where the two turntable cylinders (30) are close to each other, and a telescopic component three (28) is installed at the extended end. The lower output end of the telescopic component three (28) is connected to a top plate (29) that abuts against the upper side of the upper mold base (33).

6. A CIM-based powder injection molding die for ceramic parts according to claim 1, characterized in that, The drive assembly includes a gear ring (16), a servo motor (18), and a gear (19). The servo motor (18) is installed inside a collar (17) and arranged in an array on the inner wall of the collar (17). The gear (19) is installed at the output end of the servo motor (18). The gear ring (16) is fitted onto the outer side of the front disc (5) or the rear disc (6). The gear (19) meshes with the gear ring (16).

7. A CIM-based powder injection molding die for ceramic parts according to claim 1, characterized in that, The side plates (13) on both sides of the front disc (5) are connected to slide rod brackets (21). Each slide rod bracket (21) is fitted with a sliding seat (37) on its outer side. The rear ends of the slide rod (38) are connected to the sliding seats (37) on both sides respectively, and slide on the side plate (13) through the sliding seats (37). The ratchet (36) on the two turntable cylinders (30) are also connected to a limiting slide frame (42) on one side away from each other. The limiting slide frame (42) is fitted with a ratchet block (43). One end of the ratchet block (43) extends to the outer side of the limiting slide frame (42) and engages with the ratchet (36), while the other end slides in the limiting slide frame (42) and is connected to the inner wall of the limiting slide frame (42) by a spring (44).

8. A CIM-based powder injection molding process for ceramic parts, comprising a CIM-based powder injection molding mold for ceramic parts according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Add ceramic feed into the injection molding machine (2), and then select the corresponding target mold according to the ceramic parts to be injected; Step 2: When the ceramic part being injection molded is a large single piece, control the telescopic part 1 (22) to retract, and pull the front disc (5) and the rear disc (6) closer to each other through the rotating plate (23), so that the socket (11) is separated from the injection molding machine (2), and at the same time the rough injection head (8) is separated from the injection port (35). Step 3: During the process of the front disc (5) and the rear disc (6) approaching each other in Step 2, the slide (38) will be pulled back, and then the mold switching component will drive the two turntable cylinders (30) to rotate. Through multiple reciprocating controls, the two turntable cylinders (30) will be driven to rotate multiple times until the target mold is rotated to the side where the two turntable cylinders (30) approach each other. Step 4: Control the drive assembly to drive the front disc (5) and the rear disc (6) to rotate, and drive the sliding frame (25) to slide by the linkage assembly, so that the turntable cylinder (30) with the target mold slides towards the middle of the base (1) until the injection port (35) on the lower mold base (31) of the target mold is coaxial with the coarse injection head (8). Then drive the front disc (5) and the rear disc (6) to move away from each other again, so that the sleeve (11) is fitted with the injection molding machine (2), and at the same time the coarse injection head (8) is fitted with the injection port (35), and injection molding can be performed. Step 5: When the injection-molded ceramic parts are small in volume or two sets, select the corresponding target molds on the two turntable cylinders (30) through Step 2-Step 3, control the drive component to drive the front disc (5) and the rear disc (6) to rotate, and control the sliding frame (25) to be directly below the front disc (5) and the rear disc (6) through the linkage component. At this time, the two turntable cylinders (30) are close to each other, and the injection port (35) on the lower mold base (31) of the target mold on one side is coaxial with the fine injection head (10) on both sides respectively. Step 6: Move the front disc (5) and the rear disc (6) away from each other so that the socket (11) fits into the injection molding machine (2) and the rough injection head (8) fits into the injection port (35) so that injection molding can be performed.

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