Ceramic part powder injection molding mold and process based on CIM

Abstract

The invention relates to the field of ceramic part injection molding, in particular to a ceramic part powder injection molding mold and process based on CIM, and solves the problems that an existing ceramic part injection mold is troublesome in switching and low in production efficiency. The injection molding device comprises a base, an injection molding machine, lantern rings, a front disc, a rear disc, a T-shaped pipe, a thick injection molding head, a straight pipe, a thin injection molding head, a sleeving head, a driving assembly, a sliding frame, a rotating disc cylinder, a lower mold base, an upper mold base, an injection molding opening and a first telescopic part, rotating plates are rotationally connected between the output end of the lower side of the first telescopic part and the two lantern rings, and mold switching assemblies are arranged on the lantern rings; the die switching assembly is used for driving and switching all the lower die bases installed on the rotary disc cylinder in an array mode, the sliding frame is further provided with a linkage assembly, and the linkage assembly is used for driving the sliding frame to slide towards one side when the front disc and the rear disc rotate. According to the device, various molds can be flexibly switched, and efficient injection molding machining production of various ceramic parts is achieved.

Description

Technical Field

[0001] The present invention relates to the field of injection molding of ceramic parts, in particular to a powder injection molding die and process for ceramic parts based on CIM. Background Art

[0002] Ceramic Injection Molding (CIM) is a precision ceramic manufacturing method that combines traditional powder metallurgy technology with plastic injection molding process. Its core is to mix a high proportion (usually 50 - 65 vol.%) of ceramic powder with a thermoplastic binder system to form a uniform feedstock, then use an injection molding machine to inject the feedstock into the mold cavity to form a green body with an accurate shape, and finally obtain a dense ceramic part through subsequent processes such as debinding and sintering.

[0003] In specific molding manufacturing, various molds with different configurations are usually connected to the injection head of the injection molding machine to realize injecting the molten feedstock in the injection molding machine into the mold and cooling and forming. However, in such an injection molding method, the injection efficiency is difficult to adjust during the specific injection process. When injecting large - volume parts, the injection efficiency is slow, which will affect the overall forming efficiency. At the same time, when switching molds for different parts, the switching is basically achieved by disassembly and assembly, which also reduces the injection molding efficiency. Therefore, a powder injection molding die and process for ceramic parts based on CIM are proposed. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a powder injection molding die and process for ceramic parts based on CIM, which can flexibly switch the injection of different ceramic parts and effectively improve the injection molding efficiency.

[0005] To solve the above - mentioned technical problems, the basic technical solution proposed by the present invention is as follows: A powder injection molding die for ceramic parts based on CIM includes a base. An injection molding machine is installed on the base. Two collar rings are coaxially and slidably arranged on the base. A front disk and a rear disk are respectively rotatably sleeved in the two collar rings. A T - shaped pipe is connected through the rear disk, and the front end of the T - shaped pipe penetrates through the center of the front disk to the front side of the front disk, and a thick injection head is connected to the extended end on the front side of the front disk. Two straight pipes are radially symmetrically connected through both sides of the rear disk, and the straight pipes penetrate through the front disk to the front side of the front disk, and a thin injection head is connected to the extended end on the front side of the front disk. Both the T - shaped pipe and the straight pipes extend to the rear side of the rear disk and are connected with socket joints for docking with the injection molding machine. A driving component for driving the front disk and the rear disk to rotate synchronously is arranged on the collar ring; A sliding frame is slidably arranged on the base. On both sides of the sliding frame, turntable cylinders are symmetrically and rotatably connected. On the upper end surface of each turntable cylinder, lower die seats are arranged in an array. Above each lower die seat, an upper die seat is slidably connected. An injection port for docking with a thick injection head or a thin injection head is connected to the lower die seat. A first telescopic member is installed on the base, and a rotating plate is rotatably connected between the lower output end of the first telescopic member and two collar rings. A mold switching assembly is arranged on the collar ring, and the mold switching assembly is used to drive and switch each of the lower die seats arranged in an array on the turntable cylinder. A linkage assembly is also arranged on the sliding frame, and the linkage assembly is used to drive the sliding frame to slide to one side when the front disc and the rear disc rotate.

[0006] Preferably, a conveying pipe is connected to the front end of the injection molding machine. The conveying pipe is provided in a group of two and is respectively butted and clamped with two socket joints at the rear side of the T-shaped pipe, or respectively butted and clamped with two straight pipes at the socket joints at the rear side of the rear disc. Three sliding rod frames are also connected to both sides of the base, and the sliding frame is slidably sleeved on the outer side of the three sliding rod frames.

[0007] Preferably, side plates are connected to both sides of each collar ring. One sliding rod frame is connected to both sides of the base. Each side plate is slidably sleeved on the outer side of the sliding rod frame on its respective side. A limiting seat is centrally sleeved on the outer side of the sliding rod frame. A first spring sleeved on the outer side of the sliding rod frame is connected between the limiting seat and the side plates on the front and rear sides.

[0008] Preferably, a rotating ring is connected to the lower end of the turntable cylinder and is rotatably connected in the sliding frame through the rotating ring. Guide rod frames one are connected to both sides of each lower die seat, and the upper die seat is slidably sleeved on the outer side of the guide rod frames one. A second spring sleeved on the outer side of the guide rod frames one is connected between the upper die seat and the turntable cylinder.

[0009] Preferably, an installation seat connected to the sliding frame is sleeved in each turntable cylinder. The mutually close sides of the two installation seats extend above the upper die seats on the mutually close sides of the two turntable cylinders, and a third telescopic member is installed at the extended end. The lower output end of the third telescopic member is connected to a top disc that cooperates with and abuts against the upper side of the upper die seat.

[0010] Preferably, the driving assembly includes a first toothed ring, a servo motor, and a gear. The servo motor is installed in the collar ring and is arranged in an array on the inner wall of the collar ring. The gear is installed at the output end of the servo motor. The first toothed ring is sleeved on the outer side of the front disc or the rear disc, and the gear is meshed and connected with the first toothed ring.

[0011] Preferably, the mold switching component includes a ratchet wheel, a carriage, a limiting chute, and a ratchet bar. The ratchet wheel is sleeved on the outer side of the lower end of the turntable cylinder. The carriage is slidably arranged on the side plates connected to both sides of the front disc, and the carriage is located between the ratchet wheels on both turntable cylinders. The limiting chutes are symmetrically opened on both sides of the carriage. The ratchet bar is connected to the limiting chute in a limiting and sliding manner, and the other end extends to the outside of the limiting chute and meshes with the ratchet wheel. A third spring is connected between one end of the ratchet bar in the limiting chute and the inner wall of the limiting chute.

[0012] Preferably, slide rod frames II are connected to the side plates on both sides of the front disc. A slide seat is sleeved on the outside of each slide rod frame II in a limiting and sliding manner. The two sides of the rear end of the carriage are respectively connected to the slide seats on both sides and slide on the side plates through the slide seats. A limiting slide frame is also connected to the side of the ratchet wheels on both turntable cylinders away from each other. A ratchet block is slidably sleeved in the limiting slide frame. One end of the ratchet block extends to the outside of the limiting slide frame and meshes with the ratchet wheel, while the other end slides in the limiting slide frame, and a fourth spring is connected between the other end and the inner wall of the limiting slide frame.

[0013] Preferably, the linkage component includes a second toothed ring and a toothed plate. Each second toothed ring is sleeved on the outside of the front disc or the rear disc. The toothed plate is connected to the slide frame. The toothed plate is meshed and connected with the second toothed ring, and the second toothed ring slides and meshes on the toothed plate.

[0014] A CIM-based powder injection molding process for ceramic parts includes the following steps: Step 1: Add ceramic feed into the injection molding machine, and then select the corresponding target mold according to the ceramic parts to be injection molded. Step 2: When the injection molded ceramic part is a large-volume single piece, control the first telescopic member to contract, and pull the front disc and the rear disc to slide closer to each other through the rotating plate, so that the socket joint is separated from the injection molding machine, and at the same time, the rough injection head is separated from the injection port. Step 3: During the process of the front disc and the rear disc approaching each other in Step 2, the carriage will be pulled backward, and then the two turntable cylinders on both sides will be driven to rotate through the mold switching component. Through multiple reciprocating controls, the two turntable cylinders will be driven to rotate multiple times until the required target mold is rotated to the side where the two turntable cylinders are close to each other. Step 4: Control the drive component to drive the front disc and the rear disc to rotate, and drive the slide frame to slide through the linkage component, so that the turntable cylinder with the target mold slides between the turntable cylinder and 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 disc and the rear disc to move away from each other again, so that the socket joint is sleeved with the injection molding machine, and at the same time, the rough injection head is sleeved with the injection port, and then injection molding can be carried out. Step 5: When the injection-molded ceramic parts are of small volume or in sets of two, select the corresponding target molds on the two turntable cylinders through Steps 2-3. Control the driving component to drive the front disc and the rear disc to rotate, and control the sliding frame to be directly below the front disc and the rear disc through the linkage component. At this time, the injection ports on the lower die seats of the target molds on the sides where the two turntable cylinders approach each other are coaxial with the fine injection heads on both sides respectively; Step 6: Drive the front disc and the rear disc to move away from each other, so that the socket joint is sleeved with the injection molding machine, and at the same time, the thick injection head is sleeved with the injection port, and then injection molding can be carried out.

[0015] The beneficial effects of the present invention are as follows: 1. The technical solution of the present invention controls the rotation of the front disc and the rear disc through the driving component, so that the sliding frame is directly below the two of them. Then, the telescopic member 1 can drive the front disc and the rear disc to move away from each other, so that the fine injection heads on both sides are docked with the injection ports on the corresponding lower die seats, realizing synchronous injection molding on both sides, which can improve the molding efficiency of injection molding. At the same time, when producing a pair of ceramic parts in sets, it can also be produced synchronously in pairs; 2. The technical solution of the present invention drives the front disc and the rear disc to approach each other through the telescopic member 1, which can pull the sliding frame to slide between the two turntable cylinders. Then, through the cooperation of the ratchet bar and the ratchet wheel, the two turntable cylinders are driven to rotate synchronously by 90° at a time, so as to switch the lower die seat and the upper die seat on the side where the two turntable cylinders approach each other, realizing flexible and efficient switching of different molds for use. And when the front disc and the rear disc on both sides approach each other, it can first drive the fine injection head to separate from the injection port, and then drive the turntable cylinder to rotate, so that the turntable cylinder is driven to rotate, and when switching different molds, it can be switched flexibly and smoothly; 3. When the front disc and the rear disc approach each other, the technical solution of the present invention controls the driving component to drive the two to rotate, which can drive the sliding frame to slide to one side, and then drive a set of the lower die seat and the upper die seat on one side of the two turntable cylinders to be coaxially corresponding to the thick injection port, so as to select a lower die seat with a large-volume cavity and dock its injection port with the thick 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 the processing efficiency. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the present invention without a base and an injection molding machine; Figure 3 is a side-sectional structural view of the present invention without a base and an injection molding machine; Figure 4 is a top-sectional structural view of the present invention without a base and an injection molding machine; Figure 5 isFigure 3 Enlarged view of part A Figure 6 Schematic diagram of the relevant structure between the front disc and the rear disc of the present invention Figure 7 Schematic diagram of the relevant structure on the sliding frame of the present invention Figure 8 Schematic diagram of the relevant structure on the turntable cylinder of the present invention Figure 9 Schematic diagram of the structure of the sliding frame of the present invention Figure 10 Top view structural sectional view of the sliding frame of the present invention Figure 11 Schematic diagram of the structure of the limiting sliding frame of the present invention Figure 12 Top view structural sectional view of the limiting sliding frame of the present invention

[0017] Explanation of reference numerals 1. Base; 2. Injection molding machine; 3. Delivery 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. First sliding rod frame; 13. Side plate; 14. Limiting seat; 15. First spring; 16. First toothed ring; 17. Sleeve ring; 18. Servo motor; 19. Gear; 20. Second toothed ring; 21. Second sliding rod frame; 22. First telescopic member; 23. Rotating plate; 24. Third sliding rod frame; 25. Sliding frame; 26. Toothed plate; 27. Mounting seat; 28. Third telescopic member; 29. Top plate; 30. Turntable cylinder; 31. Lower mold base; 32. First guide rod frame; 33. Upper mold base; 34. Second spring; 35. Injection port; 36. Ratchet; 37. Sliding seat; 38. Sliding frame; 39. Limiting chute; 40. Ratchet bar; 41. Third spring; 42. Limiting sliding frame; 43. Ratchet block; 44. Fourth spring Detailed implementation manners

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying Figure 1 drawings to Figure 8 It is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention

[0019] Embodiment 1

[0020] As shown in Figures 1 - 12As shown in the figure, the present invention discloses a CIM-based ceramic part powder injection molding die, which includes a base 1. An injection molding machine 2 is installed on the base 1. Two collars 17 are coaxially and slidably arranged on the base 1. A front disc 5 and a rear disc 6 are respectively rotatably sleeved in the two collars 17. A T-shaped pipe 7 is connected through the rear disc 6. The front end of the T-shaped pipe 7 penetrates through the center of the front disc 5 to the front side of the front disc 5, and a thick injection head 8 is connected to the extended end on the front side of the front disc 5. Two straight pipes 9 are radially symmetrically connected through both sides of the rear disc 6. The straight pipes 9 penetrate through the front disc 5 to the front side of the front disc 5, and a thin injection head 10 is connected to the extended end on the front side of the front disc 5. Both the T-shaped pipe 7 and the straight pipes 9 extend to the rear side of the rear disc 6 and are connected with socket joints 11 for docking with the injection molding machine 2. A driving component is arranged on the collar 17 for driving the front disc 5 and the rear disc 6 to rotate synchronously; Among them, the injection molding machine 2 is an existing device. Both the T-shaped pipe 7 and the straight pipes 9 are made of high-temperature resistant stainless steel hoses and have a certain redundant length to facilitate the relative sliding of the front disc 5 and the rear disc 6; A sliding frame 25 is slidably arranged on the base 1. Turntable cylinders 30 are symmetrically and rotatably connected to both sides of the sliding frame 25. Lower die seats 31 are arrayedly installed on the upper end surfaces of the turntable cylinders 30. An upper die seat 33 is slidably connected above each lower die seat 31. An injection port 35 for docking with the thick injection head 8 or the thin injection head 10 is connected to the lower die seat 31. A first telescopic member 22 is installed on the base 1. A rotating plate 23 is rotatably connected between the lower output end of the first telescopic member 22 and the two collars 17. A die switching component is arranged on the collar 17 for driving and switching each of the lower die seats 31 arrayedly installed on the turntable cylinder 30. A linkage component is also arranged on the sliding frame 25 for driving the sliding frame 25 to slide to one side when the front disc 5 and the rear disc 6 rotate.

[0021] A delivery pipe 3 is connected to the front end of the injection molding machine 2. The delivery pipe 3 is provided in a group of two and is respectively butted and clamped with the two socket joints 11 on the rear side of the T-shaped pipe 7, or respectively butted and clamped with the socket joints 11 on the rear side of the two straight pipes 9. Slide bar frames three 24 are also connected to both sides of the base 1. The sliding frame 25 is slidably sleeved on the outside of the slide bar frames three 24. Among them, sealing structures are arranged between the socket joint 11 and the delivery pipe 3, between the thick injection head 8 and the injection port 35, and between the thin injection head 10 and the injection port 35. The sealing structures adopt the existing sealing structures in hot injection molding to ensure that no leakage occurs during the injection process.

[0022] On both sides of each collar 17, there are side plates 13 connected. On both sides of the base 1, there is a first slide bar frame 12 connected. Each side plate 13 is slidably sleeved on the outside of the first slide bar frame 12 on its respective side. In the middle of the outside of the first slide bar frame 12, there is a limit seat 14 sleeved. Between the limit seat 14 and the side plates 13 on the front and rear sides, there is a first spring 15 sleeved on the outside of the first slide bar frame 12, so that the front disc 5 and the rear disc 6 can be respectively controlled to rotate in their respective collars 17 through the driving assembly. At the same time, the collar 17 can also slide on the outside of the first slide bar frame 12 through the side plates 13 connected to its two sides, and the rotation of the rotating plate 23 is realized by the expansion and contraction of the first telescopic member 22, which can drive the front disc 5 and the rear disc 6 to perform corresponding sliding away from each other or approaching each other. When approaching each other, the first spring 15 can be compressed, and when sliding away from each other, it can quickly move away under the push of the rotating plate 23 and the elastic force of the two first springs 15 on both sides.

[0023] At the lower end of the turntable cylinder 30, there is a rotating ring connected, and it is rotatably connected in the sliding frame 25 through the rotating ring. On both sides of each lower die holder 31, there is a first guide bar frame 32 connected. The two sides of the upper die holder 33 are slidably sleeved on the outside of the first guide bar frame 32. Between the upper die holder 33 and the turntable cylinder 30, there is a second spring 34 sleeved on the outside of the first guide bar frame 32. Among them, the outside of the rotating ring is rotatably connected to the sliding frame 25 through a bearing. The setting of the first guide bar frame 32 can stabilize the up and down sliding of the upper die holder 33 and keep the upper die holder 33 always directly above the lower die holder 31. Under the action of the second spring 34, the upper die holder 33 can slide upward away from the lower die holder 31, so that the upper die holder 33 and the lower die holder 31 are separated and opened.

[0024] In each turntable cylinder 30, there is an installation seat 27 connected to the sliding frame 25 sleeved. On the side where the two installation seats 27 approach each other, they both extend above the upper die holders 33 on the side where the two turntable cylinders 30 approach each other, and a third telescopic member 28 is installed at the extended end. The lower output end of the third telescopic member 28 is connected to a top disc 29 that cooperates and abuts against the upper side of the upper die holder 33.

[0025] The lower end of the installation seat 27 is in the shape of a rotating shaft, and it passes through the center of the turntable cylinder 30 and the rotating ring that is rotatably connected to the sliding frame 25 through a bearing at its lower end and is connected to the sliding frame 25, and at the same time, it will not hinder the rotation of the turntable cylinder 30, and the side where the two installation seats 27 approach each other is above the upper die holders 33 on the side where the two turntable cylinders 30 approach each other. In this way, when the turntable cylinder 30 rotates, it can drive the upper die holders 33 and the lower die holders 31 with different mold cavities to be directly below the top disc 29. During injection molding, the third telescopic member 28 is driven to move the top disc 29 downward and abut against the upper die holder 33, so that it moves downward to cover the lower die holder 31. During this process, the second spring 34 is compressed, so that after the injection molding is completed and the top disc 29 is driven to move upward, the upper die holder 33 can be automatically opened under the elastic force of the second spring 34.

[0026] Embodiment 2

[0027] As Figures 1 - 12 shown, the present invention discloses a CIM-based ceramic part powder injection molding die and process. Compared with Embodiment 1, the structure of the driving component is disclosed in this embodiment.

[0028] The driving component includes a first toothed ring 16, a servo motor 18, and a gear 19. The servo motor 18 is installed inside the collar 17 and is 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 first toothed ring 16 is sleeved on the outer side of the front disc 5 or the rear disc 6, and the gear 19 is meshed and connected with the first toothed ring 16.

[0029] In this way, by starting the servo motor 18, the gear 19 can be driven to rotate, and then the first toothed ring 16, the front disc 5, and the rear disc 6 can be driven to rotate through the meshing connection.

[0030] Embodiment 3

[0031] As Figures 1 - 12 shown, the present invention discloses a CIM-based ceramic part powder injection molding die and process. Compared with Embodiment 2, the structure of the die switching component is disclosed in this embodiment.

[0032] The die switching component includes a ratchet wheel 36, a carriage 38, a limit chute 39, and a ratchet bar 40. The ratchet wheel 36 is sleeved on the outer side of the lower end of the turntable cylinder 30. The carriage 38 is slidably arranged on the side plates 13 connected to both sides of the front disc 5, and the carriage 38 is located between the ratchet wheels 36 on the two turntable cylinders on both sides. The limit chutes 39 are symmetrically opened on both sides of the carriage 38. The ratchet bar 40 is slidably connected in the limit chutes 39 in a limited manner, and the other end extends to the outside of the limit chutes 39 and is meshed with the ratchet wheel 36. A third spring 41 is connected between one end of the ratchet bar 40 in the limit chutes 39 and the inner wall of the limit chutes 39.

[0033] When the telescopic member 22 contracts to pull the rotating plates 23 on both sides of its output end to rotate, and drives the front disc 5 and the rear disc 6 to slide closer to each other, it can also synchronously pull the carriage 38 to slide backward between the two turntable cylinders 30. During the backward movement of the carriage 38, the ratchet bar 40 sliding in the inner limiting chute 39 thereof does not engage with the ratchet wheel 36 first, that is, the carriage 38 slides by itself for a certain distance first, to ensure that the fine injection heads 10 on both sides or the thick injection head 8 in the middle are separated from the injection ports 35 on the corresponding lower mold base 31, and then the ratchet bar 40 engages with the ratchet wheel 36, and then can drive the two turntable cylinders 30 to rotate 90° at a time, realizing the use of different combinations of the lower mold base 31 and the upper mold base 33. When the front disc 5 and the rear disc 6 move closer to and away from each other, the ratchet bar 40 will be pushed by the ratchet wheel 36 to slide into the limiting chute 39 and compress the third spring 41. Until the ratchet bar 40 moves forward and completely passes the ratchet wheel 36, it rebounds under the action of the third spring 41, facilitating the next or continuous multiple switching operations, improving the flexibility of switching different molds, and also being able to improve production efficiency.

[0034] Slide rod frames II 21 are connected to the side plates 13 on both sides of the front disc 5. A sliding seat 37 is limited and sleeved on the outside of each slide rod frame II 21. The two sides of the rear end of the carriage 38 are respectively connected to the two sliding seats 37 and slide on the side plates 13 through the sliding seats 37. On the side where the ratchet wheels 36 on the two turntable cylinders 30 are far away from each other, a limiting sliding frame 42 is also connected. A ratchet block 43 is slidably sleeved in the limiting sliding frame 42. One end of the ratchet block 43 extends to the outside of the limiting sliding frame 42 to engage with the ratchet wheel 36, and the other end slides in the limiting sliding frame 42 and is connected to the inner wall of the limiting sliding frame 42 by a fourth spring 44.

[0035] This makes the sliding of the carriage 38 on the side plates 13 more stable. At the same time, through the action of the ratchet block 43 and the ratchet wheel 36, it can also ensure the one-way rotation of the ratchet wheel 36 and the turntable cylinder 30. When the carriage brings the ratchet bar 40 to move forward, the ratchet wheel 36 can also be limited by the ratchet block 43 to keep the turntable cylinder 30 stable and prevent it from rotating back and generating errors.

[0036] Embodiment 4

[0037] As Figures 1 - 12 shown, the present invention discloses a CIM-based ceramic part powder injection molding die and process. Compared with Embodiment 3, the structure of the linkage assembly is disclosed in this embodiment.

[0038] The linkage assembly includes a second toothed ring 20 and a toothed plate 26. Each second toothed ring 20 is sleeved on the outside of the front disc 5 or the rear disc 6. The toothed plate 26 is connected to the sliding frame 25. The toothed plate 26 is meshed and connected with the second toothed ring 20, and the second toothed ring 20 slides and meshes on the toothed plate 26.

[0039] Through the setting of the linkage component, it is possible to control the sliding frame 25 to be directly below the front disc 5 and the rear disc 6 through the driving component, or to control the sliding frame 25 to slide to one side of the two, so that in the specific injection molding process, when the sliding frame 25 is directly below the front disc 5 and the rear disc 6, it is convenient for the injection ports 35 of the fine injection heads 10 on both sides to be coaxially docked with the lower die bases 31 on the side where the two turntable cylinders 30 are close to each other, so as to produce two ceramic parts or a set of paired ceramic parts simultaneously; When the sliding frame 25 slides to one side of the front disc 5 and the rear disc 6, the injection port 35 of the lower die base 31 on one turntable cylinder 30 can correspond to the thick injection head 8, which is convenient for high-efficiency injection of large-volume ceramic parts through large-flow injection, and improves the production efficiency of the injection molding process.

[0040] Embodiment Five [[ID=])

[0041] As Figures 1 - 12 shown, the present invention discloses a CIM-based powder injection molding process for ceramic parts, which 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 to be injected is a large-volume single piece, control the first telescopic member 22 to contract, and pull the front disc 5 and the rear disc 6 to slide closer to each other through the rotating plate 23, so that the socket joint 11 is separated from the injection molding machine 2, and at the same time the thick 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 carriage 38 will be pulled backward, and then the two turntable cylinders 30 will be driven to rotate through the mold switching component, and through multiple reciprocating controls, the two turntable cylinders 30 will be driven to rotate multiple times until the required target mold is rotated to the side where the two turntable cylinders 3 are close to each other; Step 4: Control the driving component to drive the front disc 5 and the rear disc 6 to rotate, and drive the sliding frame 25 to slide through the linkage component, so that the turntable cylinder 30 with the target mold slides between the base 1 until the injection port 35 on the lower die base 31 of the target mold is coaxial with the thick injection head 8, and then drive the front disc 5 and the rear disc 6 to move away from each other again, so that the socket joint 11 is sleeved with the injection molding machine 2, and at the same time the thick injection head 8 is sleeved with the injection port 35, and then injection molding can be carried out; Step 5: When the ceramic parts to be injected are small in volume or in sets of two, select the corresponding target molds on the two turntable cylinders 30 through Steps 2 - 3, control the driving 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 injection ports 35 on the lower die bases 31 of the target molds on the side where the two turntable cylinders 30 are close to each other are respectively coaxial with the fine injection heads 10 on both sides; Step Six: Drive the front disc 5 and the rear disc 6 away from each other, so that the socket joint 11 is sleeved with the injection molding machine 2, and at the same time, the rough injection head 8 is sleeved with the injection port 35, then injection molding can be carried out.

[0042] Based on the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also 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. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A CIM-based ceramic part powder injection molding die, comprising a base (1), an injection molding machine (2) is installed on the base (1), two collar rings (17) are coaxially and slidably arranged on the base (1), and a front disc (5) and a rear disc (6) are respectively rotatably sleeved in the two collar rings (17), characterized in that, A T-shaped pipe (7) is connected through the rear disc (6), and the front end of the T-shaped pipe (7) penetrates through the center of the front disc (5) to the front side of the front disc (5), and a thick injection head (8) is connected to the extended end on the front side of the front disc (5). Straight pipes (9) are symmetrically connected through the rear disc (6) in the radial direction on both sides, and the straight pipes (9) penetrate through the front disc (5) to the front side of the front disc (5), and a thin injection head (10) is connected to the extended end on the front side of the front disc (5). The T-shaped pipe (7) and the straight pipes (9) both extend to the rear side of the rear disc (6) and are connected with socket joints (11) for docking with the injection molding machine (2). A driving component for driving the front disc (5) and the rear disc (6) to rotate synchronously is arranged on the collar (17). A sliding frame (25) is slidably arranged on the base (1). Rotary barrel (30) are symmetrically and rotatably connected to both sides of the sliding frame (25). Lower die bases (31) are arranged in an array on the upper end surface of the rotary barrel (30). An upper die base (33) is slidably connected above each lower die base (31). An injection port (35) for docking with the thick injection head (8) or the thin injection head (10) is connected to the lower die base (31). A first telescopic member (22) is installed on the base (1), and a rotating plate (23) is rotatably connected between the lower output end of the first telescopic member (22) and the two collars (17). A mold switching component is arranged on the collar (17), and the mold switching component is used to drive and switch each of the lower die bases (31) arranged in an array on the rotary barrel (30). A linkage component is also arranged on the sliding frame (25), and 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.

2. The ceramic part powder injection molding die based on CIM according to claim 1, characterized in that, A conveying pipe (3) is connected to the front end of the injection molding machine (2). The conveying pipes (3) are arranged in a group of two, and are respectively in butt joint and clamping fit with the two socket joints (11) on the rear side of the T-shaped pipe (7), or are respectively in butt joint and clamping fit with the socket joints (11) on the rear side of the two straight pipes (9). Slide bar frames three (24) are also connected to both sides of the base (1), and the sliding frame (25) is slidably sleeved on the outside of the slide bar frames three (24).

3. The ceramic part powder injection molding die based on CIM according to claim 1, characterized in that, Side plates (13) are connected to both sides of each collar (17). Slide bar frames one (12) are connected to both sides of the base (1). Each side plate (13) is slidably sleeved on the outside of the slide bar frame one (12) on its respective side. A limit seat (14) is centrally sleeved on the outside of the slide bar frame one (12). A first spring (15) sleeved on the outside of the slide bar frame one (12) is connected between the limit seat (14) and the front and rear side plates (13).

4. A CIM-based ceramic part powder injection molding die according to claim 1, characterized in that, The lower end of the turntable cylinder (30) is connected with a swivel ring and is rotationally connected in the sliding frame (25) through the swivel ring. Guide rod brackets one (32) are connected to both sides of each lower die holder (31). The upper die holder (33) is slidably sleeved on the outer sides of the guide rod brackets one (32). A second spring (34) sleeved on the outer sides of the guide rod brackets one (32) is connected between the upper die holder (33) and the turntable cylinder (30).

5. A CIM-based ceramic part powder injection molding die according to claim 3, characterized in that, An installation seat (27) connected to the sliding frame (25) is sleeved in each turntable cylinder (30). The extending ends of the mutually approaching sides of the two installation seats (27) extend above the upper die holders (33) on the mutually approaching sides of the two turntable cylinders (30), and a third telescopic member (28) is installed at the extending ends. The lower output end of the third telescopic member (28) is connected with a top disc (29) that cooperates with and abuts against the upper side of the upper die holder (33).

6. The ceramic part powder injection molding die based on CIM according to claim 1, characterized in that, The driving assembly includes a first toothed ring (16), a servo motor (18), and a gear (19). The servo motor (18) is installed in the collar (17) and is 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 first toothed ring (16) is sleeved on the outer side surface of the front disc (5) or the rear disc (6). The gear (19) is meshed and connected with the first toothed ring (16).

7. A CIM-based ceramic part powder injection molding die according to claim 1, characterized in that, The die switching assembly includes a ratchet wheel (36), a sliding frame (38), a limiting sliding groove (39), and a ratchet bar (40). The ratchet wheel (36) is sleeved on the outer side of the lower end of the turntable cylinder (30). The sliding frame (38) is slidably arranged on the side plates (13) connected to both sides of the front disc (5), and the sliding frame (38) is located between the ratchet wheels (36) on the two turntable cylinders (30). The limiting sliding grooves (39) are symmetrically opened on both sides of the sliding frame (38). The ratchet bar (40) is slidably connected in the limiting sliding grooves (39) in a limiting manner, and the other end extends to the outside of the limiting sliding grooves (39) and is meshed with the ratchet wheel (36). A third spring (41) is connected between one end of the ratchet bar (40) in the limiting sliding grooves (39) and the inner wall of the limiting sliding grooves (39).

8. A CIM-based ceramic part powder injection molding die according to claim 6, characterized in that, Sliding rod brackets two (21) are connected to the side plates (13) on both sides of the front disc (5). Slide seats (37) are slidably sleeved on the outer sides of each sliding rod bracket two (21) in a limiting manner. The two sides of the rear end of the sliding frame (38) are respectively connected to the two slide seats (37), and the sliding frame (38) slides on the side plates (13) through the slide seats (37). Limiting sliding frames (42) are also connected to the mutually remote sides of the ratchet wheels (36) on the two turntable cylinders (30). A ratchet block (43) is slidably sleeved in the limiting sliding frames (42). One end of the ratchet block (43) extends to the outside of the limiting sliding frames (42) and is meshed with the ratchet wheel (36), while the other end slides in the limiting sliding frames (42), and a fourth spring (44) is connected between the other end and the inner wall of the limiting sliding frames (42).

9. A CIM-based ceramic part powder injection molding die according to claim 1, characterized in that, The linkage assembly includes a second gear ring (20) and a toothed plate (26). Each second gear ring (20) is sleeved on the outer side of the front disk (5) or the rear disk (6). The toothed plate (26) is connected to the sliding frame (25). The toothed plate (26) is meshed and connected with the second gear ring (20), and the second gear ring (20) slides and meshes on the toothed plate (26).

10. A CIM-based powder injection molding process for ceramic parts, according to any one of claims 1-9, a CIM-based powder injection molding die for ceramic parts, characterized in that, It 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 injection molded. Step 2: When the injection molded ceramic part is a large-volume single piece, control the first telescopic member (22) to contract, and pull the front disk (5) and the rear disk (6) to slide closer to each other through the rotating plate (23), so that the socket joint (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 disk (5) and the rear disk (6) approaching each other in Step 2, the carriage (38) will be pulled backward, and then the two side turntubes (30) will be driven to rotate by the mold switching assembly, and through multiple reciprocating controls, the two side turntubes (30) will be driven to rotate multiple times until the required target mold is rotated to the side where the two side turntubes (3) are close to each other. Step 4: Control the drive assembly to drive the front disk (5) and the rear disk (6) to rotate, and drive the sliding frame (25) to slide by the linkage assembly, so that the turntube (30) with the target mold slides between the turntube and the base (1) until the injection port (35) on the lower die base (31) of the target mold is coaxial with the rough injection head (8), and then drive the front disk (5) and the rear disk (6) to move away from each other again, so that the socket joint (11) is sleeved with the injection molding machine (2), and at the same time, the rough injection head (8) is sleeved with the injection port (35), and then injection molding can be carried out. Step 5: When the injection molded ceramic parts are small in volume or in sets of two, select the corresponding target molds on the two side turntubes (30) through Step 2 - Step 3, control the drive assembly to drive the front disk (5) and the rear disk (6) to rotate, and control the sliding frame (25) to be directly below the front disk (5) and the rear disk (6) through the linkage assembly. At this time, the injection ports (35) on the lower die bases (31) of the target molds on the side where the two side turntubes (30) are close to each other are respectively coaxial with the two fine injection heads (10). Step 6: Drive the front disk (5) and the rear disk (6) to move away from each other, so that the socket joint (11) is sleeved with the injection molding machine (2), and at the same time, the rough injection head (8) is sleeved with the injection port (35), and then injection molding can be carried out.

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