Metal powder injection molding sintering jig

Abstract

The invention relates to the technical field of sintering jigs, and discloses a metal powder injection molding sintering jig which comprises a base plate, a fixing sleeve, a plurality of discharging assemblies and a plurality of supporting assemblies are connected to the upper surface of the base plate, the fixing sleeve is located in the middle of the base plate, and the discharging assemblies and the supporting assemblies are circumferentially distributed on the periphery of the fixing sleeve. The discharging assemblies and the supporting assemblies are arranged in a crossed mode, a sliding assembly is connected to the interior of the fixing sleeve, a hanging assembly and a rotating assembly are connected to the outer wall of the upper end of the sliding assembly, a plurality of shaping assemblies are connected to the lower end of the hanging assembly, and the shaping assemblies are circumferentially distributed on the periphery of the sliding assembly. According to the metal powder injection molding sintering jig, the multiple discharging assemblies and the multiple supporting assemblies are arranged on the base plate, and discharging can be conducted more rapidly and accurately after a workpiece is sintered; and by arranging the sliding assembly, the height and angle changes of the discharging assembly and the supporting assembly can be matched, and more appropriate adjustment can be conducted.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering fixtures, and particularly to a sintering fixture for metal powder injection molding. Background Art

[0002] Metal Powder Injection Molding (MIM) is an advanced powder metallurgy technology that combines traditional powder metallurgy processes with plastic injection molding technology. This process is particularly suitable for manufacturing small metal parts with complex geometries.

[0003] The sintering fixture in Metal Powder Injection Molding (MIM), also known as a sintering jig or support device, is an auxiliary device used to support and fix parts during the sintering process. Sintering is one of the key steps in the MIM process, and its purpose is to make the metal powder particles in the parts diffuse, flow, and finally combine into a dense whole through high-temperature heating. During this process, the parts will undergo a certain amount of shrinkage, and if not controlled, it may cause part deformation or other defects.

[0004] Currently, the patent with the publication number CN219074367U discloses a sintering fixture. The sintering fixture includes a base body, and the base body has a support surface. The support surface includes: protruding portions arranged at intervals, and the bottom surface of the concave position formed between the protruding portions forms a first support surface; a first recessed portion, the bottom surface of the first recessed portion has a profiled combined support surface, the profiled combined support surface includes a plurality of profiled surfaces, and the plurality of profiled surfaces are located on different planes so that the bottom surface of the groove forms a stepped convex structure; a second recessed portion, arranged on the bottom surface of the first recessed portion, and the plurality of second recessed portions are respectively arranged on any one or more profiled surfaces. This sintering fixture can support the product in all directions during the sintering process to prevent deformation.

[0005] However, in the actual use process of the above sintering fixture, the following problems still exist: When the workpiece is sintered, it often fits closely to the inner wall of the sintering fixture. At this time, when the workpiece is taken out of the fixture, external tools are often needed to take the workpiece out of the interior of the fixture. The overall steps are not only cumbersome but also the separation efficiency is low. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a sintering fixture for metal powder injection molding to solve the problem that it is inconvenient to take out the workpiece after sintering at present.

[0007] To achieve the above object, the present invention provides the following technical solution: A sintering fixture for metal powder injection molding, comprising a chassis, on the upper surface of which a fixed sleeve, a plurality of unloading components and a plurality of support components are connected. The fixed sleeve is located in the middle of the chassis, and the plurality of unloading components and the plurality of support components are circumferentially distributed around the fixed sleeve, and the plurality of unloading components and the plurality of support components are arranged in a crosswise manner. Inside the fixed sleeve, a sliding component is connected. On the outer wall of the upper end of the sliding component, a suspension component and a rotating component are connected. At the lower end of the suspension component, a plurality of shaping components are connected. The plurality of shaping components are circumferentially distributed around the sliding component, and the plurality of shaping components are respectively aligned with the plurality of unloading components and the plurality of support components. At the end of the rotating component away from the sliding component, a plurality of shielding components are connected, and the other ends of the plurality of shielding components are respectively aligned with the plurality of shaping components.

[0008] Further, the unloading component includes a connecting plate and a plurality of ejector pins. The bottom surface of the connecting plate is fixedly connected to the upper surface of the chassis, and the upper surface of the connecting plate is fixedly connected to the lower ends of the plurality of ejector pins. The plurality of ejector pins are respectively aligned with the shaping components, and the upper ends of the plurality of ejector pins are in the shape of a slope, where the high end of the slope is located inside and the low end of the slope is located outside.

[0009] Further, the support component includes a support column and a support plate. The lower end of the support column is fixedly connected to the upper surface of the chassis, the upper end of the support column is fixedly connected to the bottom surface of the support plate, and the upper surface of the support plate matches the shaping component.

[0010] Further, the shaping component includes a shaping cover, a bottom plate and a plurality of heightening rods. A plurality of air vents are formed through the upper surface of the bottom plate. The side wall of the bottom plate is fixedly connected to the inner wall of the lower end of the shaping cover. The bottom surface of the shaping cover is fixedly connected to the upper ends of the plurality of heightening rods. The lower ends of the plurality of heightening rods are all abutted against the upper surface of the support plate. The plurality of air vents are respectively aligned with the plurality of ejector pins, and the inner wall of the air vent is slidably connected to the outer wall of the ejector pin. The outer wall of the shaping cover is connected to the suspension component.

[0011] Further, the suspension component includes a support disk and a plurality of support rods. The inner side wall of the support disk is connected to the upper end of the sliding component, the bottom surface of the outer side wall of the support disk is fixedly connected to the upper ends of the plurality of support rods, and the lower ends of the plurality of support rods are respectively fixedly connected to the outer walls of the plurality of shaping covers.

[0012] Further, the sliding component includes an outer column, a middle column and a limiting component. The outer wall of the upper end of the outer column is connected to one end of the rotating component. The lower end of the middle column is fixedly connected to the inner wall of the fixed sleeve. An elevating cavity is formed at the lower end of the outer column. The middle column is located in the elevating cavity, and the outer wall of the middle column is slidably connected to the inner wall of the elevating cavity. A sliding cavity is formed inside the middle column. The lower end of the limiting component is located in the sliding cavity. The upper end of the limiting component passes through the upper ends of the middle column and the outer column to the outside of the outer column and is connected to the other end of the rotating component.

[0013] Further, the limiting component includes an anti - detachment slider, a rotating rod, and an inner rod. The outer wall of the anti - detachment slider is slidably connected to the inner wall of the sliding cavity. The upper end of the anti - detachment slider is fixedly connected to the lower end of the inner rod. The upper end of the inner rod passes through the upper end of the middle column to the outside of the middle column and is rotatably connected to the lower end of the rotating rod. The upper end of the rotating rod passes through the upper end of the outer column and is connected to one end of the rotating component. The outer wall of the rotating rod is fixedly connected to the penetration part of the outer column.

[0014] Further, the rotating component includes a support frame, a second gear, a plurality of knobs, a plurality of connecting rods, and a plurality of first gears. The second gear is sleeved and rotatably connected to the outer wall of the upper end of the outer column. The middle part of the support frame is fixedly connected to the end of the inner rod passing through the outer column. The other several ends of the support frame are respectively sleeved and rotatably connected to the upper ends of the plurality of connecting rods. The lower ends of the plurality of connecting rods respectively pass through the plurality of first gears to the lower side of the first gears and are respectively connected to the plurality of shielding components. The lower ends of the plurality of knobs are fixedly connected to the upper surface of the second gear. The second gear meshes with the plurality of first gears.

[0015] Further, the shielding component includes a guiding cover and an extended baffle. The upper surface of the guiding cover is fixedly connected to the lower end of the connecting rod. The bottom surface of the guiding cover abuts against the upper surface of the shaping cover. The inner side wall of the extended baffle is fixedly connected to the side wall of the upper end of the guiding cover. A pick - up and placement opening is provided at the lower end of the guiding cover.

[0016] Further, a circumferential sliding groove is provided on the outer wall of the upper end of the middle column. A plurality of vertical sliding grooves are provided on the bottom surface of the circumferential sliding groove. An anti - detachment ring is fixedly connected to the inner wall of the lower end of the outer column. A plurality of guiding sliders are fixedly connected to the inner side wall of the anti - detachment ring. The outer wall of the anti - detachment ring is slidably connected to the outer wall of the middle column. The outer walls of the plurality of guiding sliders are respectively slidably connected to the inner walls of the plurality of vertical sliding grooves, and the outer walls of the plurality of guiding sliders are also slidably connected to the inner wall of the circumferential sliding groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. For this kind of metal powder injection molding sintering jig, by arranging a plurality of unloading components and support components on the chassis, after the workpiece is sintered, the blanking can be carried out more quickly and accurately.

[0018] 2. For this kind of metal powder injection molding sintering jig, by arranging a sliding component, it can make more appropriate adjustments in cooperation with the height and angle changes of the unloading component and the support component.

[0019] 3. For this kind of metal powder injection molding sintering jig, by arranging a shielding component, it can not only prevent impurities above and on the side of the sintering furnace from falling into the shaping component during the sintering process and contaminating the workpiece, but also limit the sliding direction of the workpiece during subsequent unloading. Description of the Drawings

[0020] Figure 1Schematic diagram of the overall appearance during demolding of the present invention; Figure 2 Schematic diagram of the overall appearance during the sintering process of the present invention; Figure 3 Exploded view of each component of the overall appearance of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic view of part A in; Figure 5 For the present invention Figure 3 Enlarged schematic view of part B in; Figure 6 Detailed connection schematic diagram of components such as the suspension assembly, shielding assembly, and sliding assembly of the present invention; Figure 7 For the present invention Figure 6 Partial sectional view of each component in; Figure 8 For the present invention Figure 7 Exploded view of each component in; Figure 9 For the present invention Figure 8 Detailed connection schematic diagram of part C in; Figure 10 Partial structural schematic diagram of the sliding assembly of the present invention; Figure 11 Schematic diagrams of two perspectives of the shielding assembly of the present invention.

[0021] In the figure: 1, chassis; 2, pillar; 3, support plate; 4, outer column; 5, support disk; 6, heightening rod; 7, support frame; 8, connecting rod; 9, first gear; 10, second gear; 11, knob; 12, guide cover; 13, extension baffle; 14, shaping cover; 15, ejector pin; 16, connecting plate; 17, middle column; 18, fixed sleeve; 19, bottom plate; 20, support rod; 21, anti - detachment slider; 22, rotating rod; 23, guide slider; 24, anti - detachment ring; 25, inner rod; 26, lifting cavity; 27, access opening; 28, vertical chute; 29, sliding cavity; 30, circumferential chute; 31, air vent. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Please refer to Figures 1 - 11, A sintering fixture for metal powder injection molding, comprising a chassis 1. A fixing sleeve 18, a plurality of unloading components and a plurality of supporting components are connected to the upper surface of the chassis 1. Among them, the fixing sleeve 18 is located in the middle of the chassis 1, and the plurality of unloading components and the plurality of supporting components are circumferentially distributed around the fixing sleeve 18, and the plurality of unloading components and the plurality of supporting components are arranged in a cross manner. A sliding component is connected inside the fixing sleeve 18. The outer wall of the upper end of the sliding component is connected with a hanging component and a rotating component. The lower end of the hanging component is connected with a plurality of shaping components. The plurality of shaping components are circumferentially distributed around the sliding component, and the plurality of shaping components are respectively matched and aligned with the plurality of unloading components and the plurality of supporting components. One end of the rotating component away from the sliding component is connected with a plurality of shielding components, and the other ends of the plurality of shielding components are respectively matched and aligned with the plurality of shaping components.

[0024] As Figures 1 to 11 shown, when the sintering fixture for metal powder injection molding in the present invention is in use, the following steps can be carried out: 1. First, clean the inside of the plurality of shaping components, and then place the plurality of workpieces that have been injection-molded into the shaping components respectively.

[0025] 2. Then, place the plurality of shaping components with workpieces on top of the plurality of supporting components respectively, so that the shaping components will not slide down due to gravity or other reasons.

[0026] 3. Subsequently, put the entire sintering fixture (i.e., the chassis 1, the fixing sleeve 18, the plurality of unloading components and the plurality of supporting components and other components mentioned above) together on the mesh belt in the sintering furnace, and then it is transported to the sintering furnace through the mesh belt for sintering.

[0027] 4. When the sintering fixture is taken out of the sintering furnace and cooled, at this time, the worker manually or the robotic arm rotates the rotating component to one side.

[0028] 5. While the rotating component rotates, the part of it connected to the sliding component will take the fixing sleeve 18 as the central axis, driving the shielding component to rotate. At this time, the opening of the shielding component changes from the original inward direction to the outward direction.

[0029] 6. Then, rotate the rotating component and the sliding component at the same time. After the sliding component rotates, it can drive the hanging component connected to its surface to rotate.

[0030] 7. After the hanging component rotates, the shaping component connected to the hanging component can move from the original supporting component to above the unloading component. At the same time, because the rotating component rotates together, the shielding component will also move to above the unloading component.

[0031] 8. Then release the rotating component and the sliding component. At this time, the shaping component will slide down under the action of its own gravity because there is no support from the supporting component below.

[0032] 9. While the shaping component slides down, the bottom of the shaping component comes into contact with the unloading component. When the shaping component continues to descend, the workpiece located inside the shaping component will be resisted by the unloading component, preventing the workpiece from continuing to descend.

[0033] 10. When the shaping component slides down to contact the chassis 1, the workpiece also just separates from the shaping component at this time. And because the upper end of the unloading component presents an inclined surface, the workpiece separated from the shaping component will slide directly along the slope to the outside of the chassis 1, and then can be collected manually or by mechanical equipment.

[0034] 11. After the workpiece slides away from the unloading component, the shaping component is pulled up again manually or by a robotic arm and other equipment, and stops after the shaping component moves above the support component.

[0035] 12. While the shaping component stops, a new workpiece is reinstalled into the shaping component manually or by a robotic arm.

[0036] 13. Then, the shaping component and the workpiece are rotated back above the support component again simultaneously (there are also separate rotations here, which has no impact), and the above steps 2 - 10 can be repeated.

[0037] It should be particularly noted here that: 1. The injection molding of the workpiece is a very mature technology in the existing process and has nothing to do with this solution, so it will not be described in detail here.

[0038] 2. When the workpiece is placed into the shaping component, it can be placed manually or by an external robotic arm. This is also an existing operating technology, so it will not be described in detail.

[0039] 3. The sintering furnace and the sintering furnace mesh belt are also mature technologies in the existing process and have nothing to do with this solution, so they will not be described in detail here either.

[0040] As a preferred solution of the present invention, the unloading component includes a connecting plate 16 and a number of ejector pins 15. The bottom surface of the connecting plate 16 is fixedly connected to the upper surface of the chassis 1, the upper surface of the connecting plate 16 is fixedly connected to the lower ends of the number of ejector pins 15, the number of ejector pins 15 are all matched and aligned with the shaping component, and the upper ends of the number of ejector pins 15 present an inclined surface, where the high end of the inclined surface is located inside and the low end of the inclined surface is located outside.

[0041] More specifically, after sintering, the shaping component rotates to the top of the connecting plate 16 and is aligned with the ejector pin 15. The shaping component is then released and will naturally fall due to gravity. During the falling process, the workpiece inside the shaping component will first contact the highest ejector pin 15. Then, the shaping component will continue to fall due to gravity, but the workpiece will stop falling when blocked by the ejector pin 15 until the shaping component falls onto the chassis 1 and is completely separated from the workpiece. At this time, the workpiece will instantly slide to the lower end due to uneven force and can then leave the area of ​​the chassis 1.

[0042] Special mention should be made here: 1. Because the outside of the workpiece fits closely to the inner wall of the shaped component after sintering, if gravity cannot cause it to slide naturally, a little extra pressure can be applied to help it slide.

[0043] 2. When the workpiece is pressed against the ejector pin 15, the workpiece is likely to press against the inner wall of the forming component, causing a slight "stuck" condition. At this time, additional pressure can be applied by pressing to assist the forming component to slide down.

[0044] As a preferred solution of the present invention, the support assembly includes a pillar 2 and a support plate 3, the lower end of the pillar 2 is fixedly connected to the upper surface of the chassis 1, the upper end of the pillar 2 is fixedly connected to the bottom surface of the support plate 3, and the upper surface of the support plate 3 matches the shaping assembly.

[0045] More specifically, after the workpiece is placed in the shaping assembly, until the sintering and cooling are completed, the shaping assembly will always be placed on the support plate 3 without shaking or sliding.

[0046] As a preferred embodiment of the present invention, the shaping component includes a shaping cover 14, a base plate 19 and a plurality of height-increasing rods 6. A plurality of air holes 31 are formed through the upper surface of the base plate 19. The side wall of the base plate 19 is fixedly connected to the inner wall of the lower end of the shaping cover 14. The bottom surface of the shaping cover 14 is fixedly connected to the upper ends of the plurality of height-increasing rods 6. The lower ends of the plurality of height-increasing rods 6 are all against the upper surface of the support plate 3. The plurality of air holes 31 are respectively matched and aligned with a plurality of ejector pins 15. The inner wall of the air hole 31 is slidably connected to the outer wall of the ejector pin 15. The outer wall of the shaping cover 14 is connected to the suspension component.

[0047] More specifically, when sintering a workpiece is required, the workpiece is first placed on the bottom plate 19 inside the shaping cover 14, and then the workpiece is sintered normally. After sintering, when the shaping cover 14 rotates above the connecting plate 16 and the air vent 31 is aligned with the ejector pin 15, at this time, the shaping cover 14 naturally drops due to gravity, and while dropping, the air vent 31 slides down from the outside of the ejector pin 15. Therefore, the ejector pin 15 can hold the workpiece located on the bottom plate 19 until it finally slides up along the ejector pin 15 to the outside of the chassis 1.

[0048] It should be specifically noted here that: 1. By providing the air vent 31 and the heightening rod 6, a certain height can be provided between the bottom of the workpiece and the support assembly, so that both the upper and lower sides of the workpiece can be heated during the sintering process.

[0049] 2. The aperture of the air vent 31 is larger than the diameter of the ejector pin 15, which can prevent friction between the air vent 31 and the ejector pin 15, reduce the frictional force, and at the same time reduce the wear rate.

[0050] 3. During actual sintering, the workpiece may be of various shapes, so the inner wall of the shaping cover 14 can also be of any shape. For the convenience of display and understanding in the figure, the inner wall of the shaping cover 14 is set to be cylindrical, which does not mean that the shaping cover 14 can only be cylindrical.

[0051] As a preferred embodiment of the present invention, the suspension assembly includes a support disc 5 and a plurality of support rods 20. The inner side wall of the support disc 5 is connected to the upper end of the sliding assembly, the bottom surface of the outer side wall of the support disc 5 is fixedly connected to the upper ends of the plurality of support rods 20, and the lower ends of the plurality of support rods 20 are respectively fixedly connected to the outer walls of the plurality of shaping covers 14.

[0052] More specifically, the support disc 5 and the plurality of support rods 20 are mainly used to connect the sliding assembly and the shaping cover 14, and at the same time have a certain height, which is convenient for leaving enough height for the ejector pin 15 to slide out after ejecting the workpiece from the shaping cover 14, without being stuck between the shaping cover 14 and the shielding assembly.

[0053] As a preferred embodiment of the present invention, the sliding assembly includes an outer column 4, a middle column 17 and a limiting assembly. The outer wall of the upper end of the outer column 4 is connected to one end of the rotating assembly, the lower end of the middle column 17 is fixedly connected to the inner wall of the fixed sleeve 18, a lifting cavity 26 is opened at the lower end of the outer column 4, the middle column 17 is located in the lifting cavity 26, and the outer wall of the middle column 17 is slidably connected to the inner wall of the lifting cavity 26. A sliding cavity 29 is opened inside the middle column 17, the lower end of the limiting assembly is located in the sliding cavity 29, and the upper end of the limiting assembly passes through the upper ends of the middle column 17 and the outer column 4 to the outside of the outer column 4 and is connected to the other end of the rotating assembly.

[0054] More specifically, after the first batch of sintered workpieces are pushed out by the ejector pin 15 and slide to the outside of the chassis 1, at this time, the support plate 5 and the support rod 20 are pulled up (only up, and the shaping cover 14 is located above the ejector pin 15 at this time). While the shaping cover 14 is moving up, the outer column 4 slides up outside the middle column 17 through the lifting cavity 26, and the limiting component located in the sliding cavity 29 inside the middle column 17 will also rise along with the sliding cavity 29. Subsequently, the workpieces to be sintered are reloaded into the shaping cover 14 manually or by a robotic arm. After loading is completed, the rotating component and the outer column 4 are rotated to one side. After the rotating component rotates, it will drive the shielding component to rotate together. While the shielding component is rotating, the shielding component changes from originally opening outward to opening inward, and after the outer column 4 rotates, the shaping cover 14 can be rotated to the upper side of the support plate 3 and then remain stationary (so far, the shaping cover 14, the outer column 4, the limiting component, etc. all remain stationary).

[0055] When the second batch of workpieces mentioned above are also sintered, at this time, the shaping cover 14 is rotated again, and then the outer column 4, the limiting component, etc. will also rotate together. When the shaping cover 14 drops due to gravity, at this time, the outer column 4 and the limiting component will be sleeved outside and inside the middle column 17 again.

[0056] As a preferred solution of the present invention, the limiting component includes an anti - detachment slider 21, a rotating rod 22 and an inner rod 25. The outer wall of the anti - detachment slider 21 is slidably connected to the inner wall of the sliding cavity 29. The upper end of the anti - detachment slider 21 is fixedly connected to the lower end of the inner rod 25. The upper end of the inner rod 25 penetrates through the upper end of the middle column 17 to the outside of the middle column 17 and is rotatably connected to the lower end of the rotating rod 22. The upper end of the rotating rod 22 penetrates through the upper end of the outer column 4 and is connected to one end of the rotating component. The outer wall of the rotating rod 22 is fixedly connected to the penetrating part of the outer column 4.

[0057] More specifically, when the shaping cover 14 is sleeved outside the ejector pin 15, at this time, the outer column 4 is sleeved outside the middle column 17, and the anti - detachment slider 21 and the inner rod 25 are both located in the sliding cavity 29 of the middle column 17 (the rotating rod 22 is connected inside the outer column 4).

[0058] When the shaping cover 14 is located on the support plate 3, at this time, the outer column 4 slides to the uppermost end of the middle column 17, and the anti - detachment slider 21 will also move to the uppermost end along the sliding cavity 29. At the same time, the inner rod 25 can make up for the height difference between the outer column 4 and the middle column 17, so it will not affect the subsequent normal steps.

[0059] It should be particularly noted here that: The rotating rod 22 and the inner rod 25 are provided because the rotating component needs to achieve two effects: 1. Control the rotation of the shaping cover 14, etc. to achieve the purpose of loading and unloading materials.

[0060] 2. While the shaping cover 14 is rotating, it is also necessary to drive the shielding component to rotate. Therefore, in order to prevent the rotations of the two from conflicting, the rotation component is restricted by the rectangular inner rod 25 so that a part of the rotation component does not rotate together with another part. In addition, the cylindrical rotating rod 22 can be connected to the outer column 4 so that the anti - detachment slider 21, the rotating rod 22, and the inner rod 25 can move up and down together with the outer column 4 without affecting the normal rotation of the outer column 4 itself.

[0061] As a preferred embodiment of the present invention, the rotation component includes a support frame 7, a second gear 10, a plurality of knobs 11, a plurality of connecting rods 8, and a plurality of first gears 9. The second gear 10 is sleeved and rotatably connected to the outer wall of the upper end of the outer column 4. The middle part of the support frame 7 is fixedly connected to one end of the inner rod 25 passing through the outer column 4. The other ends of the support frame 7 are respectively sleeved and rotatably connected to the upper ends of the plurality of connecting rods 8. The lower ends of the plurality of connecting rods 8 respectively pass through the plurality of first gears 9 to the lower side of the first gears 9 and are respectively connected to the plurality of shielding components. The lower ends of the plurality of knobs 11 are fixedly connected to the upper surface of the second gear 10. The second gear 10 meshes with the plurality of first gears 9.

[0062] More specifically, when it is necessary to control the rotation of the shaping cover 14 and the shielding component, only need to manually rotate the knob 11. After the knob 11 rotates, it can drive the second gear 10 to rotate in the same direction. After the second gear 10 rotates, it can rotate around the axis of the middle outer column 4. And during the rotation, it drives the plurality of first gears 9 to rotate through meshing. And due to the knob 11, when the knob 11 rotates from one side to the middle, it can exactly control the first gear 9 to rotate 180°, thus realizing the conversion of the opening facing inwards and outwards.

[0063] After the opening direction is adjusted, only need to rotate the second gear 10 and the support frame 7 simultaneously. At this time, when the support frame 7 rotates, it can drive the outer column 4 to rotate, and then drive the shaping cover 14 to rotate through the suspension component.

[0064] It should be particularly noted here that: 1. When the support frame 7 rotates, the first gear 9 connected above it will also rotate together. And because the second gear 10 is also rotating, they do not form meshing with each other, so the opening direction will not be changed.

[0065] 2. The number of teeth of the second gear 10 is much more than that of the first gear 9. Taking the attached drawing as an example, when the number of support components and unloading components is four, at this time, the shaping cover 14 only needs to rotate 45° from the support component to the position of the unloading component. And because the opening of the shielding component must rotate 180° from the inside to the outside, at this time, the number of teeth of the first gear 9 is only one - quarter of the number of teeth of the second gear 10.

[0066] As a preferred embodiment of the present invention, the shielding assembly includes a guiding cover 12 and an extended baffle 13. The upper surface of the guiding cover 12 is fixedly connected to the lower end of the connecting rod 8, the bottom surface of the guiding cover 12 abuts against the upper surface of the shaping cover 14, the inner side wall of the extended baffle 13 is fixedly connected to the side wall at the upper end of the guiding cover 12, and a pick-up and placement opening 27 is formed at the lower end of the guiding cover 12.

[0067] More specifically, during the sintering process, due to the action of the extended baffle 13 above the guiding cover 12 at this time, impurities dripping from above the sintering furnace will be blocked, and the guiding cover 12 itself will also block impurities that may adhere to the side wall of the sintering furnace, thereby enhancing the protection effect.

[0068] After the sintering is completed, since the direction of the pick-up and placement opening 27 of the guiding cover 12 changes from inward to outward, the workpiece located on the ejector pin 15 can only slide out in the direction of the pick-up and placement opening 27 facing outward.

[0069] As a preferred embodiment of the present invention, a circumferential chute 30 is formed on the outer wall at the upper end of the middle column 17, several vertical chutes 28 are formed on the bottom surface of the circumferential chute 30, an anti-detachment ring 24 is fixedly connected to the inner wall at the lower end of the outer column 4, several guiding sliders 23 are fixedly connected to the inner side wall of the anti-detachment ring 24, the outer wall of the anti-detachment ring 24 is slidably connected to the outer wall of the middle column 17, the outer walls of several guiding sliders 23 are respectively slidably connected to the inner walls of several vertical chutes 28, and the outer walls of several guiding sliders 23 are all slidably connected to the inner wall of the circumferential chute 30.

[0070] More specifically, by providing the circumferential chute 30, the vertical chutes 28, the anti-detachment ring 24 and the guiding sliders 23, firstly, the trajectory of the movement of the outer column 4 on the surface of the middle column 17 can be assisted, so that it can only move in a specific direction; secondly, when the outer column 4 is rotated, when the guiding slider 23 is aligned with the vertical chute 28, because the lower part of the guiding slider 23 is pointed and the upper end of the vertical chute 28 is open, there will be an obvious sense of jerk, and thus the worker can clearly understand that the air vent 31 is exactly aligned with the ejector pin 15 at this time (if it is operated by a robotic arm, because it is programmed, it can be more intuitively understood at what position it arrives).

[0071] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal powder injection molding sintering fixture, characterized in that: The invention comprises a chassis (1), wherein the upper surface of the chassis (1) is connected to a fixing sleeve (18), a plurality of discharge assemblies and a plurality of support assemblies, wherein the fixing sleeve (18) is located in the middle of the chassis (1), the plurality of discharge assemblies and the plurality of support assemblies are circumferentially distributed around the fixing sleeve (18), and the plurality of discharge assemblies and the plurality of support assemblies are cross-arranged, the interior of the fixing sleeve (18) is connected to a sliding assembly, the outer wall of the upper end of the sliding assembly is connected to a suspension assembly and a rotating assembly, the lower end of the suspension assembly is connected to a plurality of shaping assemblies, the plurality of shaping assemblies are circumferentially distributed around the sliding assembly, and the plurality of shaping assemblies are respectively matched and aligned with the plurality of discharge assemblies and the plurality of support assemblies, and the end of the rotating assembly away from the sliding assembly is connected to a plurality of shielding assemblies, and the other ends of the plurality of shielding assemblies are respectively matched and aligned with the plurality of shaping assemblies.

2. A metal powder injection molding sintering jig according to claim 1, characterized in that: The unloading assembly comprises a connecting plate (16) and a plurality of ejector pins (15), wherein the bottom surface of the connecting plate (16) is fixedly connected to the upper surface of the chassis (1), and the upper surface of the connecting plate (16) is fixedly connected to the lower ends of the plurality of ejector pins (15), the plurality of ejector pins (15) are all matched and aligned with the shaping assembly, and the upper ends of the plurality of ejector pins (15) are sloped, wherein the upper end of the slope is located on the inner side and the lower end of the slope is located on the outer side.

3. A metal powder injection molding sintering jig according to claim 2, characterized in that: The support assembly comprises a support column (2) and a support plate (3); the lower end of the support column (2) is fixedly connected to the upper surface of the chassis (1); the upper end of the support column (2) is fixedly connected to the bottom surface of the support plate (3); and the upper surface of the support plate (3) matches the shaping assembly.

4. A metal powder injection molding sintering jig according to claim 3, characterized in that: The shaping component comprises a shaping cover (14), a bottom plate (19) and a plurality of height-increasing rods (6); a plurality of air vents (31) are formed through the upper surface of the bottom plate (19); a side wall of the bottom plate (19) is fixedly connected to the inner wall of the lower end of the shaping cover (14); a bottom surface of the shaping cover (14) is fixedly connected to the upper ends of the plurality of height-increasing rods (6); the lower ends of the plurality of height-increasing rods (6) are all in contact with the upper surface of the support plate (3); the plurality of air vents (31) are respectively matched and aligned with the plurality of ejector pins (15); the inner wall of the air vents (31) is slidably connected to the outer wall of the ejector pin (15); and the outer wall of the shaping cover (14) is connected to the suspension component.

5. The metal powder injection molding sintering jig according to claim 4, characterized in that: The suspension assembly comprises a support plate (5) and a plurality of support rods (20); the inner side wall of the support plate (5) is connected to the upper end of the sliding assembly; the bottom surface of the outer side wall of the support plate (5) is fixedly connected to the upper ends of the plurality of support rods (20); and the lower ends of the plurality of support rods (20) are respectively fixedly connected to the outer walls of the plurality of shaping covers (14).

6. The metal powder injection molding sintering jig according to claim 5, characterized in that: The sliding assembly comprises an outer column (4), a middle column (17) and a limit assembly, wherein the outer wall of the upper end of the outer column (4) is connected to one end of the rotating assembly, the lower end of the middle column (17) is fixedly connected to the inner wall of the fixing sleeve (18), the lower end of the outer column (4) is provided with a lifting cavity (26), the middle column (17) is located in the lifting cavity (26), and the outer wall of the middle column (17) is slidably connected to the inner wall of the lifting cavity (26), the interior of the middle column (17) is provided with a sliding cavity (29), the lower end of the limit assembly is located in the sliding cavity (29), the upper end of the limit assembly passes through the upper end of the middle column (17) and the upper end of the outer column (4) to the outside of the outer column (4), and is connected to the other end of the rotating assembly.

7. The metal powder injection molding sintering jig according to claim 6, characterized in that: The limit assembly comprises an anti-slip slider (21), a rotating rod (22) and an inner rod (25); the outer wall of the anti-slip slider (21) is slidably connected to the inner wall of the sliding cavity (29); the upper end of the anti-slip slider (21) is fixedly connected to the lower end of the inner rod (25); the upper end of the inner rod (25) penetrates the upper end of the middle column (17) to the outside of the middle column (17) and is rotatably connected to the lower end of the rotating rod (22); the upper end of the rotating rod (22) penetrates the upper end of the outer column (4) and is connected to one end of the rotating assembly; the outer wall of the rotating rod (22) is fixedly connected to the penetration point of the outer column (4).

8. The metal powder injection molding sintering jig according to claim 7, characterized in that: The rotating assembly comprises a support frame (7), a second gear (10), a plurality of knobs (11), a plurality of connecting rods (8) and a plurality of first gears (9); the second gear (10) is sleeved and rotatably connected to the outer wall of the upper end of the outer column (4); the middle part of the support frame (7) is fixedly connected to one end of the inner rod (25) penetrating the outer column (4); the other ends of the support frame (7) are sleeved and rotatably connected to the upper ends of the plurality of connecting rods (8); the lower ends of the plurality of connecting rods (8) respectively penetrate the plurality of first gears (9) to the bottom of the first gear (9) and are respectively connected to the plurality of shielding assemblies; the lower ends of the plurality of knobs (11) are fixedly connected to the upper surface of the second gear (10); the second gear (10) and the plurality of first gears (9) are meshed.

9. The metal powder injection molding sintering jig according to claim 8, characterized in that: The shielding assembly comprises a guide cover (12) and an extended baffle (13); the upper surface of the guide cover (12) is fixedly connected to the lower end of the connecting rod (8); the bottom surface of the guide cover (12) abuts against the upper surface of the shaping cover (14); the inner side wall of the extended baffle (13) is fixedly connected to the side wall of the upper end of the guide cover (12); and the lower end of the guide cover (12) is provided with a take-in / put-out opening (27).

10. The metal powder injection molding sintering jig according to claim 6, characterized in that: The outer wall of the upper end of the middle column (17) is provided with a circumferential slide groove (30), and the bottom surface of the circumferential slide groove (30) is provided with a plurality of vertical slide grooves (28). The inner wall of the lower end of the outer column (4) is fixedly connected with an anti-slip ring (24), and the inner side wall of the anti-slip ring (24) is fixedly connected with a plurality of guide sliders (23). The outer wall of the anti-slip ring (24) is slidably connected to the outer wall of the middle column (17), and the outer walls of the plurality of guide sliders (23) are respectively slidably connected to the inner walls of the plurality of vertical slide grooves (28), and the outer walls of the plurality of guide sliders (23) are all slidably connected to the inner wall of the circumferential slide groove (30).

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