A MIM online mold changing mechanism

Abstract

The present invention relates to the field of MIM processing, and in particular to a MIM online mold changing mechanism. The present invention provides such a MIM online mold changing mechanism, comprising a base frame and a lower mold shell, etc.; the base frame is connected to the lower mold shell. The interior of the lower mold shell is provided with a lower mold core that can be quickly replaced through an elastic support component, and the interior of the upper mold shell is provided with an upper mold core that can be quickly replaced. During the loading process, the ejection component pushes the first steel plate downward to the inside of the first slot of the lower mold core. During the demolding process, the electromagnet in the lower mold shell pulls the metal blank and the first steel plate upward through the magnetic attraction generated, and provides complete supporting protection for the weak areas of the metal blank through the first steel plate, avoiding the phenomenon that the upper mold core or the lower mold core needs to be frequently replaced due to the weak areas of the metal blank being stuck in the upper mold core or the lower mold core. It solves the technical problem that the efficiency reduction caused by frequent mold replacement in MIM online production is greatly affected.

Description

Technical Field

[0001] The present invention relates to the field of MIM processing, and in particular to a MIM online die changing mechanism. Background Art

[0002] MIM is suitable for mass production of metal parts with good product performance consistency. MIM has a wide range of materials and a broad application field. A wide range of materials can be used for injection molding, such as carbon steel, alloy steel, tool steel, refractory alloy, cemented carbide, high-density alloy, etc.

[0003] During the MIM parts production process, timely adjusting the production plan according to order information on the MIM parts production line will undoubtedly affect production efficiency. Changing products will inevitably require frequent mold changes. Frequent mold changes are a waste of time and have certain requirements on human resources. In addition, when replacing different molds to produce different metal parts, when the metal parts are demolded during the demolding step, weak areas of the metal parts are easily stuck in the mold, causing the metal parts to fail to be demolded. Temporary mold improvements and replacements are required, further deepening the impact of reduced efficiency caused by frequent mold changes on MIM online production. Summary of the Invention

[0004] In order to overcome the disadvantage that the efficiency is greatly reduced due to frequent mold replacement in MIM online production, the present invention provides a MIM online mold changing mechanism.

[0005] The MIM online mold changing mechanism described in this article includes a base frame, a lower mold shell, an elastic support assembly, a lower mold core, a first steel plate, an ejection assembly, an upper mold shell and an upper mold core; the lower mold shell is installed on the base frame; the elastic support assembly is connected to the interior of the lower mold shell; the lower mold core is connected to the elastic support assembly; a first slot structure is opened on the upper side of the lower mold core; the lower mold core and the base frame are commonly connected with the ejection assembly; the first steel plate corresponding to the first slot is connected to the ejection assembly; a limiting rod is fixed on the base frame; the upper mold shell is commonly slidably connected between the upper ends of the limiting rods; an electric push rod is fixed on the base frame; the telescopic ends of the electric push rod are commonly fixed to the upper mold shell; the upper mold core is installed inside the upper mold shell; an electromagnet is commonly installed between the upper mold shell and the upper mold core, and the first steel plate provides complete support protection for the weak area of ​​the metal blank under the magnetic attraction of the electromagnet; an injection tube connected to the upper mold core is provided in the middle of the upper mold shell.

[0006] Furthermore, a limiting groove structure is provided on the lower mold core; and a limiting plate adapted to the limiting groove structure is provided on the lower mold shell.

[0007] Furthermore, the elastic support assembly includes a support block, a height adjustment screw, a positioning plate and a first spring;

[0008] A support block is slidably connected inside the lower mold shell; a height adjustment screw is rotatably connected to the lower side of the base frame; the upper end of the height adjustment screw is screwed to the support block; a first spring is fixedly connected to the upper side of the support block; a positioning plate is fixedly connected between the upper ends of the first springs; and the upper side of the positioning plate is plugged into the lower mold core.

[0009] Furthermore, the ejection assembly includes an ejector rod, a fixing plate, a second spring, a pressure block and a pressure rod;

[0010] The lower side of the first steel plate is fixed with a push rod through a threaded structure; the lower end of the push rod is fixed with a fixed plate through a bolt; a second spring is fixed between the fixed plate and the base frame; a pressure block is fixed on the fixed plate; the telescopic end of the electric push rod is fixed with a pressure rod, and the pressure rod is aligned with the adjacent pressure block up and down.

[0011] Furthermore, a second slot structure is provided on the lower side of the upper mold core; each second slot is connected to an elastic steel plate, which enters the second slot after being squeezed by the powder to form a complete upper mold with the upper mold core.

[0012] Furthermore, the elastic steel plate member is composed of a second steel plate and a spring telescopic rod;

[0013] A spring telescopic rod is fixedly connected in the second clamping slot; a second steel plate is fixedly connected to the telescopic end of the spring telescopic rod, and the second steel plate is aligned with the adjacent second clamping slot in the upper and lower directions.

[0014] Furthermore, the second steel plate is aligned vertically with the adjacent first steel plate.

[0015] Furthermore, a through hole structure connected to the injection tube is opened on the second steel plate located in the middle of the upper mold core.

[0016] Furthermore, a circle of third slot structure is opened on the upper side edge of the lower mold core; the third slot is connected to the adjacent first slot; a sliding rod is slidably connected to the third slot; the upper end of the sliding rod is fixed with a third steel plate; the third steel plate is tightly attached to the third slot.

[0017] Furthermore, a tension spring is fixedly connected between the slide rod and the third slot.

[0018] Compared with the prior art, the present invention has the following advantages: an MIM online die-changing mechanism herein is provided with a quickly replaceable lower die core inside the lower die shell through an elastic support assembly, and a quickly replaceable upper die core inside the upper die shell; during the loading process, the ejection assembly pushes the first steel plate downward to squeeze it into the first slot of the lower die core, so that the first steel plate and the lower die core form a complete lower die; during the demoulding process, the ejection assembly pushes the first steel plate to eject the formed metal blank upward; at the same time, the electromagnet in the lower die shell pulls the metal blank and the first steel plate upward by the magnetic attraction force generated, and provides complete support protection for the weak area of ​​the metal blank through the first steel plate, thereby avoiding the phenomenon that the upper die core or the lower die core needs to be frequently replaced due to the weak area of ​​the metal blank being stuck in the upper die core or the lower die core;

[0019] The technical problem of reduced efficiency caused by frequent mold replacement in MIM online production has been solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a three-dimensional structure of the present invention is described according to an embodiment;

[0021] Figure 2 A cross-sectional view of a lower mold shell according to a first perspective of the present invention is described according to an embodiment;

[0022] Figure 3 A second perspective cross-sectional view of the lower mold shell of the present invention is described according to an embodiment;

[0023] Figure 4 An exploded view of the lower mold shell and the lower mold core of the present invention is described according to an embodiment;

[0024] Figure 5 An exploded view of the lower mold core and the first steel plate of the present invention is described according to an embodiment;

[0025] Figure 6 A cross-sectional view of an upper mold core is provided to describe the present invention according to an embodiment;

[0026] Figure 7 An exploded view of an upper mold shell and an upper mold core is provided to describe the present invention according to an embodiment;

[0027] Figure 8 A schematic diagram of the three-dimensional structure of a spring telescopic rod according to an embodiment of the present invention is described;

[0028] Figure 9 A schematic diagram of the three-dimensional structure of the lower mold shell and the third steel plate of the present invention is described according to an embodiment;

[0029] Figure 10 An exploded view of the lower mold shell and the third steel plate of the present invention is described according to an embodiment;

[0030] Figure 11 The figure is a schematic diagram of the three-dimensional structure of the sliding rod and the tension spring according to an embodiment of the present invention.

[0031] In the above drawings: 1-base, 11-limiting rod, 12-electric push rod, 13-pressure rod, 2-lower mold shell, 21-limiting plate, 31-support block, 32-height adjustment screw, 33-positioning plate, 34-first spring, 4-lower mold core, 40-first slot, 401-limiting slot, 402-third slot, 41-first steel plate, 42-top rod, 43-fixed plate, 431-pressure block, 44-second spring, 45-third steel plate, 46-slide rod, 47-tension spring, 5-upper mold shell, 51-injection tube, 52-electromagnet, 6-upper mold core, 60-second slot, 71-second steel plate, 710-through hole, 72-spring telescopic rod. DETAILED DESCRIPTION

[0032] First of all, it should be noted that in the various described embodiments, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the entire description can be transferred to the same components having the same reference numerals or identical component names. Positional designations selected in the description, such as top, bottom, lateral, etc., also refer to the directly described and illustrated figures and are transferred to the new position in the event of a change in position.

[0033] Example 1

[0034] A MIM online mold changing mechanism, such as Figure 1-Figure 7As shown, it includes a base frame 1, a lower mold shell 2, an elastic support component, a lower mold core 4, a first steel plate 41, an ejection component, an upper mold shell 5 and an upper mold core 6; the lower mold shell 2 is bolted to the base frame 1; the elastic support component is connected to the interior of the lower mold shell 2; the lower mold core 4 is connected to the elastic support component; a plurality of first slots 40 structures are provided on the upper side of the lower mold core 4; the lower mold core 4 and the base frame 1 are commonly connected with an ejection component; the ejection component is connected to a first steel plate 41 corresponding to the first slot 40; a limit rod 11 is fixed to each of the four corners of the base frame 1; the upper ends of the four limit rods 11 are commonly slidably connected to the upper mold shell 5; the base frame 1 is bolted to two electric push rods 12; the extension of the two electric push rods 12 The contracted ends are commonly bolted to the upper mold shell 5; the internal bolts of the upper mold shell 5 are connected to the upper mold core 6; the upper mold shell 5 and the upper mold core 6 are commonly bolted to an electromagnet 52; the middle part of the upper mold shell 5 is provided with an injection tube 51 connected to the upper mold core 6; during the loading process, the electric push rod 12 pushes the ejection assembly to drive the first steel plate 41 to be squeezed downward to the inside of the adjacent first slot 40, so that the first steel plate 41 and the lower mold core 4 form a complete lower mold; during the demolding process, the ejection assembly pushes the first steel plate 41 to eject the formed metal blank upward. At the same time, the electromagnet 52 pulls the metal blank and the first steel plate 41 upward through the magnetic attraction generated, and provides complete support protection for the weak area of ​​the metal blank through the first steel plate 41.

[0035] like Figure 3 and Figure 4 As shown, a limit groove 401 structure is provided on the left and right sides of the lower mold core 4; a limit plate 21 adapted to the limit groove 401 structure is provided on the lower mold shell 2. The limit groove 401 of the lower mold core 4 is restricted by the limit plate 21 to prevent the lower mold core 4 from being separated from the lower mold shell 2 upward due to the magnetic attraction of the electromagnet 52.

[0036] like Figure 2-Figure 4 As shown, the elastic support assembly includes a support block 31, a height adjustment screw 32, a positioning plate 33 and a first spring 34; the support block 31 is slidably connected in the lower mold shell 2; the lower side of the base frame 1 is rotatably connected to the height adjustment screw 32; the upper end of the height adjustment screw 32 is screwed to the support block 31; four first springs 34 are fixed to the upper side of the support block 31; the upper ends of the four first springs 34 are commonly fixedly connected to the positioning plate 33; the upper side of the positioning plate 33 is inserted into the lower mold core 4, and according to the height of the lower mold core 4, the height adjustment screw 32 is rotated to adjust the height of the positioning plate 33 and the support block 31 in the lower mold shell 2, so that the initial distance between the lower mold core 4 and the support block 31 is maintained within the specified range.

[0037] like Figure 2-Figure 5As shown, the ejection assembly includes a push rod 42, a fixed plate 43, a second spring 44, a pressure block 431 and a pressure rod 13; the lower side of each first steel plate 41 is fixedly connected to a push rod 42 by a threaded structure; the lower ends of all push rods 42 are fixedly connected to a fixed plate 43 by bolts; the second spring 44 is fixedly connected between the fixed plate 43 and the base frame 1; two pressure blocks 431 are welded on the left and right sides of the fixed plate 43; the telescopic ends of the two electric push rods 12 are respectively fixedly connected to two pressure rods 13, and the pressure rods 13 are aligned with the adjacent pressure blocks 431 up and down.

[0038] The online mold changing work of this MIM online mold changing mechanism:

[0039] On the MIM production line, when the mold changing work of the MIM online mold changing mechanism is required, the first steel plate 41 is first removed from the push rod 42 through the threaded structure, and then the lower mold core 4 is directly taken out upward from the positioning plate 33 and replaced. After the new lower mold core 4 is placed on the positioning plate 33, it is only necessary to install the first steel plate 41 that is compatible with the first slot 40 of the new lower mold core 4 into the push rod 42 through the threaded structure, and adjust the height of the support block 31 by turning the height adjustment screw 32 with a wrench, so that the initial distance between the support block 31 and the new lower mold core 4 is maintained within the specified range, and the replacement of the lower mold core 4 can be completed.

[0040] Afterwards, the bolts connecting the upper mold core 6 are released, and the upper mold core 6 is removed from the upper mold shell 5. Then, a new upper mold core 6 is fastened to the upper mold shell 5 by bolts, and the replacement of the upper mold core 6 is completed.

[0041] The metal blank injection work of this MIM online mold changing mechanism:

[0042] The MIM online mold changing mechanism is installed on an external powder injection machine, and the injection tube 51 is connected to the injection port of the external powder injection machine.

[0043] First, the telescopic end of the electric push rod 12 drives the lower mold shell 2 to move downward along the limit rod 11, and at the same time, the telescopic end of the electric push rod 12 drives the pressure rod 13 to move downward. When the pressure rod 13 contacts the pressure block 431 below, the pressure rod 13 pushes the pressure block 431 to drive the fixed plate 43 to move downward. The fixed plate 43 drives the second spring 44 to compress downward. At the same time, the fixed plate 43 pulls the push rod 42 to drive the first steel plate 41 to move downward until the first steel plate 41 is inserted downward into the first slot 40 of the lower mold core 4. At this time, the first steel plate 41 and the lower mold core 4 form a complete lower mold. At the same time, the lower mold shell 2 drives the upper mold core 6 downward. Move until it is close to the lower mold core 4, and then the telescopic end of the electric push rod 12 continues to drive the lower mold shell 2 to move downward along the limit rod 11, and the upper mold core 6 pushes the lower mold core 4 to drive the positioning plate 33 to move downward, and the positioning plate 33 drives the first spring 34 to compress downward. At the same time, the pressure rod 13 pushes the fixed plate 43 to drive the first steel plate 41 to move downward with the lower mold core 4, so that the compressed first spring 34 forms an upward deformation elastic force. The first spring 34 provides an upward reverse support force for the positioning plate 33 on the lower mold core 4 through the deformation elastic force, so that the lower mold core 4 fits tightly with the upper mold core 6 upward, and the upper mold core 6 serves as the upper mold alone.

[0044] Afterwards, the external powder injection machine transports the molten metal powder to the injection tube 51 through the injection port to load the metal powder. The metal powder is injected between the upper mold and the lower mold through the injection tube 51 to form a metal blank, completing the metal blank injection work of the MIM online mold changing mechanism. At this time, the first steel plate 41 in the middle of the lower mold core 4 is located in a weak area with a thinner thickness in the middle of the metal blank.

[0045] The metal blank demoulding work of this MIM online mold changing mechanism:

[0046] After the metal blank injection work is completed, the required metal blank is formed between the upper mold and the lower mold, and then the electromagnet 52 is turned on and generates magnetic attraction. Since the metal powder contains a large amount of magnetic metal raw materials, the formed metal blank will have strong magnetism after being magnetized by the magnetic attraction of the electromagnet 52. The metal blank is magnetically attracted by the magnetic attraction of the electromagnet 52 through the upper mold core 6, and at the same time, the first steel plate 41 on the lower mold core 4 is also magnetically attracted by the magnetic attraction of the electromagnet 52.

[0047] Afterwards, the telescopic end of the electric push rod 12 drives the lower mold shell 2 to move upward along the limit rod 11. At the same time, the compressed first spring 34 pushes the positioning plate 33 to drive the lower mold core 4 to rise upward along with the upper mold core 6 in the lower mold shell 2. At the same time, the compressed second spring 44 pushes the fixing plate 43 to drive the push rod 42 and the first steel plate 41 to rise upward along with the lower mold core 4. The metal blank rises upward together with the lower mold core 4 and the upper mold core 6 until the limit groove 401 of the lower mold core 4 is blocked by the limit plate 21. At this time, the lower mold core 4 can no longer rise.

[0048] Then the telescopic end of the electric push rod 12 continues to drive the lower mold shell 2 to move upward along the limit rod 11, and the lower mold shell 2 drives the electromagnet 52 and the upper mold core 6 to move upward. At the same time, the metal blank and the first steel plate 41 move upward with the upper mold core 6 under the magnetic attraction of the electromagnet 52. At the same time, the compressed second spring 44 continues to push the fixed plate 43 to drive the ejector rod 42 to move upward, so that the ejector rod 42 continues to rise with the first steel plate 41, so that the metal blank is smoothly removed from the lower mold under the combined action of the magnetic attraction of the electromagnet 52 on the metal blank and the first steel plate 41 and the upward thrust provided by the ejector rod 42 on the first steel plate 41. The metal blank is taken out from the lower die core 4, and the first steel plate 41 is tightly attached to the thinner weak area in the middle of the metal blank under the magnetic attraction of the electromagnet 52. Therefore, when the metal blank is taken out from the lower die core 4, even if a part of the metal blank is stuck in the lower die core 4, since the first steel plate 41 provides a complete upward supporting force for the weak area of ​​the metal blank, when the metal blank is forcibly taken out from the lower die core 4, the weak area of ​​the metal blank will not be subjected to downward bending stress due to the local area of ​​the metal blank being stuck in the lower die core 4, which will cause the weak area of ​​the metal blank to bend and deform, thereby providing sufficient protection for the metal blank.

[0049] Finally, the magnetic attraction generated by the electromagnet 52 is disconnected, and the telescopic end of the electric push rod 12 continues to drive the lower mold shell 2, and the electromagnet 52 and the upper mold core 6 are reset upward. At the same time, the metal blank and the first steel plate 41 no longer move upward with the upper mold core 6 due to the loss of the magnetic attraction of the electromagnet 52. At this time, the upward moving push rod 42 provides support for the first steel plate 41 in time, allowing the first steel plate 41 to continue to support the metal blank, so that the metal blank is in a state of being ejected from the lower mold core 4, waiting to be taken away.

[0050] Example 2

[0051] This embodiment is a further optimization based on embodiment 1. Figures 1-8 As shown, a plurality of second card slots 60 are provided on the lower side of the upper mold core 6; each second card slot 60 is connected to an elastic steel plate. During the loading process, the metal powder entering between the upper mold core 6 and the lower mold core 4 squeezes the elastic steel plate into the adjacent second card slot 60, allowing the elastic steel plate and the upper mold core 6 to form a complete upper mold. During the demolding process, the squeezed elastic steel plate will bounce the formed metal blank downward from the upper mold.

[0052] like Figure 6-Figure 8As shown, the elastic steel plate component consists of a second steel plate 71 and a spring telescopic rod 72; two spring telescopic rods 72 are fixed to the second slot 60 by bolts; the telescopic ends of the two spring telescopic rods 72 are respectively fixed to the second steel plate 71 by a threaded structure, and the second steel plate 71 is aligned with the adjacent second slot 60 up and down; the second steel plate 71 is aligned with the adjacent first steel plate 41 up and down, and the second steel plate 71 and the first steel plate 41 corresponding to each other provide clamping protection for the weak area of ​​the metal blank; the second steel plate 71 located in the middle of the upper mold core 6 is provided with a through hole 710 structure connected to the injection tube 51 to prevent the second steel plate 71 from blocking the powder sprayed from the injection tube 51.

[0053] During the feeding process of metal powder, as the metal powder entering between the upper mold core 6 and the lower mold core 4 continues to accumulate, the metal powder accumulated between the upper mold core 6 and the lower mold core 4 pushes the second steel plate 71 to drive the spring telescopic rod 72 to compress upward, and the second steel plate 71 is squeezed into the second slot 60, allowing the second steel plate 71 and the upper mold core 6 to form a complete upper mold. At this time, the first steel plate 41 also forms a complete lower mold with the lower mold core 4, and the metal powder is injected between the upper mold and the lower mold to form a metal blank.

[0054] During the demolding process, after the electromagnet 52 is turned on, the magnetic attraction force generated pulls the metal blank and the first steel plate 41 upward and out of the lower mold core 4. At this time, the second steel plate 71 remains upward and tightly attached to the upper mold core 6 under the magnetic attraction force generated by the electromagnet 52, and the second steel plate 71 and the first steel plate 41 jointly provide upper and lower clamping protection for the weak areas of the metal blank, further enhancing the anti-bending protection effect of the weak areas of the metal blank when the metal blank is forcibly pulled out from the lower mold core 4.

[0055] When the magnetic attraction generated by the electromagnet 52 is disconnected, the compressed spring telescopic rod 72 pushes the second steel plate 71 to pop out downward from the upper mold core 6. The second steel plate 71 that pops out downward pushes the metal blank away from the upper mold core 6, preventing the metal blank from being stuck in the upper mold core 6 and being carried upward.

[0056] Example 3

[0057] This embodiment is a further optimization based on embodiment 2. Figures 1-11As shown, a circle of third slots 402 structures are provided on the upper edge of the lower mold core 4; the third slots 402 are connected to the adjacent first slots 40; each of the four corners on the third slots 402 is slidably connected to a slide rod 46; the upper ends of the four slide rods 46 are respectively fixed to the third steel plate 45 through a threaded structure; the third steel plate 45 is tightly attached to the third slots 402; a tension spring 47 is fixed between each of the four slide rods 46 and the third slots 402, and after the electromagnet 52 drives the third steel plate 45 to push the first steel plate 41 upward through the magnetic attraction, when the electromagnet 52 disconnects the magnetic attraction, the tension spring 47 stretched upward by the third steel plate 45 drives the third steel plate 45 to reset downward and detach from the metal blank.

[0058] When the metal powder contains less or even no magnetic metal raw materials, the electromagnet 52 cannot generate magnetic attraction on the metal blank to suck it upward, and it is difficult to generate magnetic attraction on the first steel plate 41 through the metal blank to push the metal blank upward. Therefore, during the demolding process, the electromagnet 52 is turned on to generate magnetic attraction on the third steel plate 45, and the third steel plate 45 pushes the first steel plate 41 to drive the metal blank to rise upward. The third steel plate 45 drives the tension spring 47 to stretch upward through the slide rod 46, so that when the metal blank is taken out from the lower mold core 4, the first steel plate 41 remains intact and close to the weak area of ​​the metal blank and provides it with upward support force, so that the metal blank can be smoothly taken out from the lower mold core 4.

[0059] After the metal blank is taken out from the lower mold core 4, the electromagnet 52 disconnects the magnetic attraction generated, and the stretched tension spring 47 pulls the slide rod 46 to drive the third steel plate 45 to quickly reset downward. At this time, the first steel plate 41 is supported by the push rod 42 moving upward, allowing the first steel plate 41 to continue to support the metal blank, while the third steel plate 45 that resets downward leaves the first steel plate 41, reducing the obstruction of the metal blank and facilitating the metal blank to be removed from the first steel plate 41.

[0060] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications may be made to the present invention without departing from the principles and spirit of the invention as defined in the claims. Therefore, the detailed description of the disclosed embodiments is intended to be illustrative only and not to limit the present invention, which is to be defined by the claims.

Claims

1. A MIM online mold changing mechanism, comprising: a base frame (1); A lower mold shell (2) is mounted on the base frame (1); an elastic support assembly is connected to the interior of the lower mold shell (2); and a lower mold core (4) is connected to the elastic support assembly. Its characteristics are: Also included is an ejection assembly; The lower mold core (4) and the base frame (1) are commonly connected with an ejection assembly; a first slot (40) structure is provided on the upper side of the lower mold core (4); a first steel plate (41) corresponding to the first slot (40) is connected to the ejection assembly; a limit rod (11) is fixed on the base frame (1); an upper mold shell (5) is commonly slidably connected between the upper ends of the limit rods (11); an electric push rod (12) is fixed on the base frame (1); the telescopic ends of the electric push rod (12) are commonly fixed to the upper mold shell (5); an upper mold core (6) is installed inside the upper mold shell (5); an electromagnet (52) is commonly installed between the upper mold shell (5) and the upper mold core (6), and the first steel plate (41) provides complete supporting protection for the weak area of ​​the metal blank under the magnetic attraction of the electromagnet (52); an injection tube (51) connected to the upper mold core (6) is provided in the middle of the upper mold shell (5); A second slot (60) structure is provided on the lower side of the upper mold core (6); each second slot (60) is connected to an elastic steel plate, and the elastic steel plate is squeezed by the powder and enters the second slot (60) to form a complete upper mold with the upper mold core (6); The elastic steel plate member is composed of a second steel plate (71) and a spring telescopic rod (72); A spring telescopic rod (72) is fixedly connected in the second clamping slot (60); a second steel plate (71) is fixedly connected to the telescopic end of the spring telescopic rod (72), and the second steel plate (71) is aligned vertically with the adjacent second clamping slot (60); The second steel plate (71) is aligned vertically with the adjacent first steel plate (41).

2. A MIM online mold changing mechanism according to claim 1, characterized in that: A limiting groove (401) structure is provided on the lower mold core (4); and a limiting plate (21) adapted to the limiting groove (401) structure is provided on the lower mold shell (2).

3. The MIM online mold changing mechanism according to claim 1, characterized in that: The elastic support assembly includes a support block (31); A support block (31) is slidably connected inside the lower mold shell (2); a height adjustment screw (32) is rotatably connected to the lower side of the base frame (1); the upper end of the height adjustment screw (32) is screwed to the support block (31); a first spring (34) is fixed to the upper side of the support block (31); a positioning plate (33) is fixed between the upper ends of the first springs (34); and the upper side of the positioning plate (33) is plugged into the lower mold core (4).

4. The MIM online mold changing mechanism according to claim 1, characterized in that: The ejection assembly includes an ejector rod (42); The lower side of the first steel plate (41) is fixedly connected to a push rod (42) via a threaded structure; the lower end of the push rod (42) is fixedly connected to a fixed plate (43) via a bolt; a second spring (44) is fixedly connected between the fixed plate (43) and the base frame (1); a pressure block (431) is fixedly connected to the fixed plate (43); the telescopic end of the electric push rod (12) is fixedly connected to a pressure rod (13), and the pressure rod (13) is aligned with the adjacent pressure block (431) in the upper and lower directions.

5. The MIM online mold changing mechanism according to claim 1, characterized in that: A through hole (710) structure communicating with the injection tube (51) is provided on the second steel plate (71) located in the middle of the upper mold core (6).

6. The MIM online mold changing mechanism according to claim 1, characterized in that: A circle of third slots (402) is provided on the upper edge of the lower mold core (4); the third slots (402) are connected to the adjacent first slots (40); a slide rod (46) is slidably connected to the third slots (402); a third steel plate (45) is fixed to the upper end of the slide rod (46); and the third steel plate (45) is closely attached to the third slots (402).

7. A MIM online mold changing mechanism according to claim 6, characterized in that: A tension spring (47) is fixedly connected between the slide bar (46) and the third slot (402).

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