A soft ferrite powder magnetic core extrusion molding machine

Abstract

The present application relates to an extrusion molding machine for soft ferrite compacted magnetic cores, and relates to the technical field of transformer magnetic core pressing. It includes a frame, a workbench arranged on the frame, and a quantitative component, a circumferential extrusion component and a height extrusion component are also arranged on the frame; the height extrusion component includes a lower pressing head arranged on the frame in a lifting manner and a lower mold arranged on the workbench, and a power component for lifting and adjusting the lower pressing head is also arranged on the frame; the circumferential extrusion component includes an extrusion cylinder arranged on the frame, an extrusion block slidably arranged on the extrusion cylinder and a sliding component for sliding adjustment of the extrusion block, and when multiple groups of extrusion blocks approach each other, they enclose a circular forming cavity, and an extrusion belt is also movably arranged in the extrusion cylinder, the extrusion belt is made of an elastic material, and the size of the extrusion belt is movably consistent with that of the forming cavity. The present application has the effect of facilitating the pressing of the magnetic core in both the diameter direction and the height direction during pressing, so that the performance of the magnetic core in the diameter direction and the height direction is uniform.

Description

Technical Field

[0001] This application relates to the technical field of magnetic core pressing equipment, and in particular to an extrusion molding machine for soft ferrite powder magnetic cores. Background Art

[0002] Soft ferrite magnetic cores are a type of high-performance magnetic material commonly used in electronic devices, with excellent magnetic and electrical properties. They are mainly made of soft magnetic ferrite materials and are usually used to manufacture electronic components such as transformers, inductors, filters, and sensors. Currently, with the rapid development of power construction equipment, soft ferrite magnetic cores are also widely used in power cable equipment and transformer inductance coils.

[0003] A Chinese patent document with the publication number CN221805296U discloses a powder magnetic core manufacturing device, which includes a frame. A workbench is installed on the frame, a compaction template is installed on the workbench, a processing groove is opened on the compaction template, a material shoveling bar is slidably connected to the workbench, two limiting bars are arranged side by side on the upper end surface of the workbench, sliding blocks are connected to both ends of the material shoveling bar, a limiting hole for the limiting bar to pass through is opened on each sliding block, a positioning block is connected to the sliding block, positioning grooves for the positioning block to be inserted and slide are opened at both ends of the material shoveling bar, an adjusting screw is threadedly connected to the positioning block, and a limiting plate is connected to the upper end of the adjusting screw.

[0004] In view of the above related technologies, when pressing the magnetic core, the mixed raw materials are often filled into the processing groove and then pressed into shape by the upper pressing head pressing down into the processing groove. At this time, the raw material powder only undergoes a volume change in the height direction during the pressing process of the upper pressing head, and the volume change in the diameter direction depends on the ductility generated in the diameter direction during the pressing of the magnetic core being suppressed. Therefore, there is a problem of non-uniform strength in the height direction and the diameter direction, which affects the strength of the subsequent formed magnetic core. Summary of the Invention

[0005] In order to facilitate the pressing in both the diameter direction and the height direction during the magnetic core pressing, so that the performance in the diameter direction and the height direction of the magnetic core is uniform, this application provides an extrusion molding machine for soft ferrite powder magnetic cores.

[0006] The extrusion molding machine for soft ferrite powder magnetic cores provided by this application adopts the following technical solutions:

[0007] A soft magnetic ferrite powder pressing magnetic core extrusion molding machine, comprising a frame, a workbench arranged on the frame, and a quantitative component, a circumferential extrusion component and a height extrusion component arranged on the frame; the height extrusion component includes a lower pressing head arranged on the frame in a lifting manner and a lower mold arranged on the workbench, and a power component for lifting and adjusting the lower pressing head is also arranged on the frame; the circumferential extrusion component includes an extrusion cylinder arranged on the frame, an extrusion block slidably arranged on the extrusion cylinder and a sliding component for slidingly adjusting the extrusion block, there are multiple groups of the extrusion blocks, and the multiple groups of extrusion blocks move close to / away from each other, and when the multiple groups of extrusion blocks approach each other, they enclose a circular molding cavity, and an extrusion belt is also movably arranged in the extrusion cylinder, the extrusion belt is made of an elastic material, and the size of the extrusion belt is movably consistent with that of the molding cavity; a synchronous component for synchronously adjusting and driving the extrusion block and the lower pressing head is also arranged on the frame; the quantitative component includes a storage tank arranged on the frame, a discharge port is opened at the bottom of the storage tank, a storage disk is rotatably arranged in the storage tank, a plurality of partition plates are arranged on the storage disk, there are a plurality of the partition plates, and the plurality of partition plates are arranged at intervals along the circumference of the storage disk, and adjacent two of the partition plates enclose a storage cavity for one-time blanking, a blanking port is opened on the storage tank, and a blocking plate is rotatably arranged at the blanking port of the storage disk, and when the blocking plate rotates to correspond to the blanking port, the corresponding blocking plate opens the storage cavity; when the lower pressing head descends and ascends for one cycle, the storage disk rotates by an angle of one storage cavity.

[0008] By adopting the above technical solution, when the magnetic core is extruded and molded, the raw material powder in the storage tank falls to the storage disk through the discharge port. Due to the plurality of partition plates arranged on the storage disk at uniform intervals, the raw material powder in the storage cavity is filled completely and quantitatively and equally. Then, through the rotatably arranged storage disk, when blanking is required, when the storage disk rotates, when the corresponding storage cavity rotates to the blanking port, the corresponding blocking plate rotates to open the blanking port, so that the raw material in the corresponding storage cavity falls through the blanking port into the molding cavity. At this time, when extrusion is carried out, the multiple extrusion blocks slide close to each other and drive the extrusion belt to close at the same time, so as to realize the circumferential extrusion of the raw material powder and perform one-time pressing. The pressed product moves into the lower mold, and the second pressing is carried out through the arranged lower pressing head.

[0009] And every time the lower pressing head descends and ascends for one cycle, at this time, the storage disk rotates by an angle of one storage cavity.

[0010] At the same time, when single-time downward pressing molding is adopted, a relatively high temperature rise will occur, so that the binder in the raw material powder is prone to performance changes, reducing the bonding strength, and the magnetic permeability and magnetic induction intensity will decrease at high temperatures, indirectly affecting the bonding performance during the pressing of the raw material powder.

[0011] When a single compression in the height direction is used, the pores in the height direction are reduced, while the pores in the circumferential direction are not squeezed to an effective extent.

[0012] Through the above technical solution, a two-step pressing molding method is adopted to reduce the impact of high temperature generated by a single pressing on the bonding performance. At the same time, a two-step circumferential extrusion and height extrusion method is adopted to make the pore density of the formed product uniform in the height and radial directions, thereby improving the uniformity of the strength performance indicators of the product after forming.

[0013] Optionally, the sliding member includes a rotating disk rotatably arranged in the frame, a sliding groove is provided on the frame, the opening direction of the sliding groove is consistent with the radial direction of the molding cavity, a sliding rod is provided on the extrusion block, the sliding rod is slidably adapted to the sliding groove, a rotating groove is provided on the rotating disk, the rotating groove is inclined along the radial direction of the molding cavity, the sliding rod is slidably arranged in the rotating groove, and multiple groups of sliding grooves and rotating grooves are provided, and multiple groups of sliding grooves correspond one-to-one to multiple extrusion blocks.

[0014] By adopting the above technical solution, when the rotating disk needs to circumferentially extrude the raw material, the rotating disk is rotated. At this time, under the limit of the inclined rotating groove, the sliding rod is driven to slide toward the center of the rotating disk, so that multiple extrusion blocks are close to each other, thereby realizing circumferential extrusion of the raw material powder.

[0015] When the extrusion is completed and the circumferentially extruded product needs to be taken out, the rotating disk is rotated in the opposite direction to drive the sliding rod to slide away from the center of the rotating disk, thereby loosening the pressed product and facilitating the removal of the pressed product.

[0016] Optionally, a take-up roller is rotatably provided on the frame, one end of the extrusion belt is wound around the take-up roller, and the other end of the extrusion belt passes through one of the extrusion blocks and is fixedly connected to the extrusion block. When the rotating disk rotates until the multiple extrusion blocks are close to each other, the take-up roller rotates to wind the extrusion belt. The frame is also provided with a synchronous moving part for synchronously adjusting the take-up roller and the extrusion block.

[0017] By adopting the above technical solution, when the lower pressure head descends for secondary pressing, the extrusion block is driven to approach the extrusion synchronously through the synchronous moving parts, and the storage roller rotates synchronously to store the extrusion belt, thereby realizing the contraction of the extrusion belt. The synchronous movement of the extrusion block and the extrusion belt realizes the uniform extrusion of the raw material powder. At the same time, the extrusion belt provided reduces the problem of raw material powder falling from the gap of the extrusion block, thereby improving the stability and uniformity of the entire pressing process.

[0018] By setting up an extrusion block to extrude the extrusion strip, the pressed magnetic core can be stably formed into a cylindrical shape. During the extrusion process, the raw material powder will extrude the extrusion strip toward the inner wall of the extrusion block, so that the extrusion strip and the inner wall of the extrusion block are stably fitted, thereby improving the outer surface quality of the magnetic core after pressing.

[0019] Optionally, the co-moving member includes a co-moving gear arranged in the rotating plate inside the workbench, the co-moving gear is coaxially arranged with the receiving roller, a co-moving gear ring is coaxially provided on the rotating plate, and the co-moving gear is meshed with the co-moving gear ring.

[0020] By adopting the above technical solution, when the rotating disk rotates to slide and adjust the position of the extrusion block, the rotation of the rotating disk drives the synchronous gear ring to rotate, and the rotation of the synchronous gear ring to be engaged rotates, thereby driving the storage roller to rotate, thereby realizing the storage or release operation of the storage roller on the extrusion belt, and realizing the synchronous sliding of the extrusion block and the storage or release of the extrusion belt.

[0021] Optionally, the synchronizing part includes a synchronizing rack slidably set on the workbench, the synchronizing rack, a lifting rack slidably set on the frame, the lifting rack is connected to the lower pressure head, a lifting gear is rotatably connected to the frame, the lifting gear is engaged with the lifting rack, and a synchronizing gear is provided on the workbench, the synchronizing gear is engaged with the synchronizing rack, and the synchronizing gear is transmission-connected to the lifting gear.

[0022] By adopting the above technical solution, when the power part drives the lower pressure head to descend for secondary pressing, at this time, the lower pressure head drives the lifting rack to descend when it descends, and drives the lifting gear to rotate when the lifting rack descends. Since the lifting gear is connected to the synchronous drive gear, when the lifting rack descends, it drives the synchronous drive gear to rotate, and the synchronous drive gear drives the synchronous rack to slide, and then drives the synchronous gear meshing with the synchronous rack to rotate. The lower pressure head drives the extrusion block to slide while descending, thereby realizing the synchronization of the first circumferential pressing and the second height pressing, thereby improving the pressing efficiency of the magnetic core and improving the production efficiency of the magnetic core.

[0023] At the same time, a power source is set up to realize the synchronization of the first pressing and the second pressing, saving the power source. The pressing pressure of the first pressing and the second pressing is controlled by this setting, thereby improving the synchronization and uniformity of the circumferential extrusion and the height extrusion, reducing the problem of uneven circumferential performance and height performance caused by the asynchrony of the circumferential extrusion force and the height extrusion force, thereby improving the quality of the magnetic core production.

[0024] Optionally, the top side of the molding cavity is open, and the top side opening of the molding cavity is movably corresponding to and connected with the discharge port of the storage box. A sealing plate is also provided on the frame, and the sealing plate movably blocks the top side opening of the molding cavity. A discharge plate is also slidably provided on the storage box, and the discharge plate receives the raw materials discharged from the discharge port. The discharge plate is movably fitted with the top side of the molding cavity. An adjusting part for slidingly adjusting the discharge plate is also provided on the workbench, and the adjusting part moves with the movement of the lower pressure head.

[0025] By adopting the above technical solution, since it is common to pile the raw material powder on the workbench when pressing the magnetic core, and then scrape the raw material powder so that the raw material powder enters the cavity of the mold under the action of gravity, and then scrape off the excess raw material powder, and then achieve pressing. In this way, the raw material powder relies solely on its own gravity to fall into the cavity to quantify the raw material powder. It is not easy to control the amount of raw material powder falling each time. Therefore, when there is a slight difference in the amount of powder during each pressing, even if the force of each pressing is consistent, there will be a difference in quality. Therefore, by rotating the storage tray and the partition fixed on the storage tray, uniform cavities are formed one by one, so that the amount of raw material powder in each storage cavity is consistent. After the storage tray rotates to drop the raw material powder in a storage cavity onto the discharge plate, the discharge plate is slid by the adjustment part, thereby realizing sliding discharge of the raw material powder, and pushing the raw material powder stored in each storage cavity to the top side of the molding cavity, thereby realizing quantitative discharge of the raw material powder.

[0026] At the same time, through the sealing plate set up, after the material is unloaded, the lower pressure head will drive the sealing plate to descend, thereby sealing the top side of the forming cavity, thereby facilitating subsequent circumferential extrusion to reduce the overflow of raw material powder from the top side of the forming cavity and improve the stability of circumferential extrusion.

[0027] Optionally, when the lower pressure head descends to the position of the lower mold, the adjusting member drives the blanking plate to move toward the direction close to the storage box, and the sealing plate blocks the top side of the molding cavity;

[0028] When the lower pressure head continues to descend to perform compression in the height direction, the extrusion block closes and the extrusion belt is wound to perform circumferential compression. At this time, the sealing plate always keeps the top side of the molding cavity blocked;

[0029] When the lower pressure head rises to a position separated from the lower mold, the rotating disk rotates by an angle of the material storage cavity, and the sealing plate always keeps blocking the top side of the molding cavity;

[0030] When the pressing head continues to rise, the sealing plate is separated from the top side of the forming cavity, and the adjusting member drives the blanking plate to slide toward the forming cavity.

[0031] By adopting the above technical solution, the above four processes realize the sealing of the forming cavity, circumferential pressing and height pressing, unloading of the material storage box, and unloading of the forming cavity. The four processes are carried out continuously by lowering a lower pressure head, reducing the control cost, thereby improving the continuity of the entire pressing process and reducing the pressing time cost caused by the secondary pressing.

[0032] Optionally, the adjusting member includes an adjusting rack slidably arranged on the workbench, the adjusting rack is connected to the blanking plate, the workbench is rotatably connected to an adjusting gear, the adjusting rack is meshed with the adjusting gear, the frame is also provided with a second lifting rack, the second lifting rack is connected to the lower pressure head, the workbench is provided with a second lifting gear, the second lifting gear is transmission-connected to the adjusting gear, a tooth groove is partially opened on the adjusting rack, when the bottom side of the lower pressure head is consistent with the top side of the lower mold, the adjusting rack is separated from the adjusting gear, and a tooth groove is also partially opened on the first lifting rack, and the first lifting rack is movably meshed with the first lifting gear;

[0033] When the first lifting rack slides to engage with the first lifting gear, the second lifting rack is separated from the second lifting gear;

[0034] When the second lifting rack slides to engage with the second lifting gear, the first lifting rack is separated from the first lifting gear.

[0035] By adopting the above technical solution, during the process of the lower pressure head descending until the height of the lower pressure head is consistent with the height of the lower mold, during this process, the first lifting rack and the first lifting rack are in a separated state, and the second lifting rack and the second lifting gear are in a meshing state. At this time, the lower pressure head descends, driving the second lifting rack to descend, driving the second lifting gear to rotate, and at this time the rotation of the second lifting gear drives the adjusting gear to rotate, thereby realizing the sliding of the adjusting rack, realizing the operation of the blanking plate away from the molding cavity, and facilitating the subsequent sealing plate to seal the molding cavity.

[0036] As the lower pressure head continues to descend and extend into the lower mold, the first lifting rack is engaged with the first lifting gear, and the second lifting rack is separated from the second lifting gear, thereby achieving the approach and contraction of the extrusion block to extrude the magnetic core.

[0037] When the lower punch finishes pressing and disengages from the mold until the height of the bottom end of the lower punch is flush with the height of the top end of the lower mold, the first lifting rack drives the first lifting gear to rotate during this process, realizing the relaxation of the extrusion block on the magnetic core and simultaneously realizing the relaxation of the magnetic core after height pressing.

[0038] During the continuous upward movement, the first lifting rack is in a separated state from the first lifting rack, and the second lifting rack is in an engaged state with the second lifting gear. At this time, the lower punch descends, driving the second lifting rack to descend and driving the second lifting gear to rotate. At this time, the rotation of the second lifting gear drives the adjustment gear to rotate, thereby realizing the sliding of the adjustment rack. At this time, the blanking plate moves toward the forming cavity under the drive of the adjustment rack, realizing the feeding of the raw material powder.

[0039] In summary, the present application includes at least one of the following beneficial technical effects:

[0040] 1. Through the provided height extrusion assembly, circumferential extrusion assembly, and synchronizing member, when the magnetic core is pressed and formed, at this time, through the provided synchronizing member, when the lower punch is driven to descend, under the action of the synchronizing member, the circumferential extrusion of the first raw material powder and the second height extrusion are carried out synchronously, reducing power waste;

[0041] 2. Through the provided rotating disk, fixed disk, rotating groove opened on the rotating disk, and sliding groove opened on the fixed disk, when circumferential extrusion pressing is required, at this time, when the rotating disk is rotated, under the limiting action of the rotating groove and the sliding groove, a plurality of sliding rods are driven to approach / separate from each other, thereby realizing circumferential extrusion and relaxation;

[0042] 3. Through the provided extrusion belt, storage roller for storing the extrusion belt, and synchronous member, while circumferential extrusion is carried out, at this time, the synchronous member drives the extrusion block and the storage roller to move synchronously, and the storage roller rotates to rotate and store the extrusion belt. The provided extrusion belt reduces the overflow of the raw material powder from the gap of the extrusion block. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic diagram of the overall structure of an extrusion molding machine for soft ferrite powder cores according to an embodiment of the present application;

[0044] Figure 2 is a schematic diagram of the connection structure of an extrusion molding machine for soft ferrite powder cores from another perspective according to an embodiment of the present application;

[0045] Figure 3 is a schematic diagram of the connection structure of the synchronizing member;

[0046] Figure 4 is a schematic diagram of the connection structure of the sliding member;

[0047] Figure 5 It is a schematic diagram of the connection structure of the storage bin and the storage tray.

[0048] Reference numerals: 1, frame; 11, workbench; 2, metering assembly; 21, storage bin; 22, discharge port; 23, partition; 24, storage tray; 241, storage cavity; 25, blanking port; 26, sealing plate; 3, height extrusion assembly; 31, lower pressing head; 32, lower mold; 33, mold hole; 34, lower pressing plate; 4, circumferential extrusion assembly; 41, extrusion cylinder; 42, extrusion block; 43, extrusion belt; 44, forming cavity; 45, sliding member; 451, rotating disk; 452, fixed disk; 453, rotating groove; 454, sliding groove; 455, sliding rod; 46, storage roller; 47, synchronous member; 471, synchronous gear; 472, synchronous rack; 5, synchronizing member; 51, synchronizing rack; 52, synchronizing gear; 53, first lifting rack; 54, first lifting gear; 6, sealing plate; 61, blanking plate; 62, baffle; 63, adjusting member; 631, adjusting rack; 632, adjusting gear; 633, second lifting gear; 634, second lifting rack; 7, rotating gear; 71, rotating rack. Detailed implementation manners

[0049] The following will further elaborate on this application in conjunction with the attached Figures 1-5 drawings.

[0050] An embodiment of this application discloses a soft ferrite powder core extrusion molding machine. Refer to Figure 1 , a soft ferrite powder core extrusion molding machine includes a vertically fixed frame 1, a horizontally fixed workbench 11 on the frame 1, and a metering assembly 2 for quantitatively adding raw material powder, a circumferential extrusion assembly 4 for circumferentially extruding the raw material powder, and a height extrusion assembly 3 for height-extruding the raw material powder on the frame 1.

[0051] Refer to Figure 1 and Figure 2 , the height extrusion assembly 3 includes a lower pressing head 31 arranged in a lifting manner on the frame 1, a lower mold 32 fixedly connected to the workbench 11, the lower pressing head 31 and the lower mold 32 are arranged opposite to each other, and the lower pressing head 31 and the lower mold 32 are correspondingly arranged. There is also a power member on the frame 1 for lifting and adjusting the lower pressing head 31. In this application, a first lifting plate and a second lifting plate are fixedly connected to the frame 1. The first lifting plate is fixedly connected to the lower pressing head 31, and the second lifting plate is connected to the output end of the power member. In this application, the power member is a hydraulic cylinder.

[0052] Refer to Figure 2 and Figure 3, the circumferential extrusion assembly 4 is fixed to the extrusion cylinder 41 on the frame 1. An extrusion block 42 is slidably arranged on the workbench 11. There are multiple groups of extrusion blocks 42. The multiple groups of extrusion blocks 42 enclose a circular forming cavity 44. The multiple groups of extrusion blocks 42 are arranged at equal intervals along the circumference of the forming cavity 44. And the extrusion cylinder 41 and the extrusion blocks 42 are arranged on one side of the lower die 32. In this application, there are three groups of extrusion blocks 42. The extrusion block 42 on the side far from the lower die 32 is fixedly arranged. The other two groups of extrusion blocks 42 are slidably arranged. And the sliding direction of the extrusion block 42 is consistent with the radial direction of the forming cavity 44. The workbench 11 is also provided with a sliding member 45 for sliding adjustment of the extrusion block 42. The sliding member 45 includes a rotating disk 451 rotatably arranged on the workbench 11 and a fixed disk 452 fixed to the workbench 11. The fixed disk 452 and the rotating disk 451 are coaxially arranged. A sliding groove 454 is formed on the fixed disk 452. The opening direction of the sliding groove 454 is consistent with the radial direction of the forming cavity 44. A sliding rod 455 is arranged on the extrusion block 42. The sliding rod 455 is slidably adapted to the sliding groove 454. A rotating groove 453 is formed on the rotating disk 451. The rotating groove 453 is arranged obliquely along the radial direction of the forming cavity 44. The sliding rod 455 is slidably arranged in the rotating groove 453. Multiple groups of sliding grooves 454 and rotating grooves 453 are formed. The multiple groups of sliding grooves 454 correspond to the multiple extrusion blocks 42 one by one.

[0053] When the technician needs to perform circumferential extrusion on the raw material by setting the rotating disk 451, at this time, by rotating the rotating disk 451, under the limitation of the obliquely arranged rotating groove 453, the sliding rod 455 is driven to slide towards the center of the rotating disk 451, so that the multiple extrusion blocks 42 approach each other, thereby realizing the circumferential extrusion of the raw material powder.

[0054] At the same time, in order to realize the extrusion of the raw material powder, an extrusion belt 43 is also movably arranged in the extrusion cylinder 41. The extrusion belt 43 is made of elastic material. The extrusion belt 43 is movably consistent with the size of the forming cavity 44. A storage roller 46 is rotatably arranged on the frame 1. One end of the extrusion belt 43 is wound around the storage roller 46. The other end of the extrusion belt 43 passes through an extrusion block 42 and is fixedly connected to this extrusion block 42. When the rotating disk 451 rotates to make the multiple extrusion blocks 42 approach each other, the storage roller 46 rotates to wind the extrusion belt 43. The frame 1 is also provided with a synchronous moving member 47 for synchronously adjusting the storage roller 46 and the extrusion block 42.

[0055] The synchronous moving member 47 includes a synchronous moving gear 471 rotatably arranged in the workbench 11. The synchronous moving gear 471 is coaxially arranged with the storage roller 46. A synchronous moving tooth ring 472 is coaxially arranged on the rotating disk 451. The synchronous moving gear 471 meshes with the synchronous moving tooth ring 472.

[0056] When the rotating disk 451 rotates to slide and adjust the position of the extrusion block 42, the rotation of the rotating disk 451 drives the rotation of the synchronous gear ring 472. The rotation of the synchronous gear ring 472 causes the meshing synchronous gear 471 to rotate, thereby driving the storage roller 46 to rotate. The extrusion block 42 is provided to extrude the extrusion belt 43, so that the pressed magnetic core is stably formed into a cylindrical shape. Since during the extrusion process, the raw material powder will extrude the extrusion belt 43 against the inner wall of the extrusion block 42, the extrusion belt 43 is stably attached to the inner wall of the extrusion block 42, improving the outer surface quality of the pressed magnetic core.

[0057] At the same time, in order to save the power source and realize the synchronous progress of circumferential pressing and height pressing, a synchronous member 5 for synchronously adjusting and driving the extrusion block 42 and the lower pressing head 31 is further provided on the frame 1. The synchronous member 5 includes a synchronous rack 51 slidably arranged on the workbench 11. The synchronous rack 51 meshes with the synchronous gear ring 472. A first lifting rack 53 is slidably arranged on the frame 1. The first lifting rack 53 is connected to the lower pressing head 31. A first lifting gear 54 is rotatably connected to the frame 1. The first lifting gear 54 meshes with the first lifting rack 53. And a synchronous gear 52 is provided on the workbench 11. The synchronous gear 52 meshes with the synchronous rack 51, and the synchronous gear 52 is drivingly connected to the first lifting gear 54.

[0058] When the power member drives the lower pressing head 31 to descend for secondary pressing, at this time, when the lower pressing head 31 descends, it drives the lifting rack to descend. When the lifting rack descends, it drives the lifting gear to rotate. Since the lifting gear is drivingly connected to the synchronous driving gear, furthermore, when the lifting rack descends, it drives the synchronous driving gear to rotate. The synchronous driving gear drives the synchronous rack 51 to slide, and then drives the synchronous gear 471 meshing with the synchronous rack 51 to rotate. The lower pressing head 31 drives the sliding of the extrusion block 42 while descending, so as to realize the synchronous progress of the first circumferential pressing and the second height pressing, thereby improving the pressing efficiency of the magnetic core and the production efficiency of the magnetic core.

[0059] Refer to Figure 1 and Figure 3 As shown in FIGS. and, the metering assembly 2 includes a storage bin 21 provided on the frame 1. A discharge port 22 is opened at the bottom of the storage bin 21. A storage disk 24 is rotatably arranged in the storage bin 21. A plurality of partition plates 23 are provided on the storage disk 24. There are a plurality of partition plates 23. The plurality of partition plates 23 are arranged at intervals along the circumference of the storage disk 24. The adjacent two partition plates 23 enclose a storage cavity 241 for one-time blanking. A blanking port 25 is opened on the storage bin 21. A blocking plate 26 is rotatably arranged at the blanking port 25 of the storage disk 24. When the blocking plate 26 rotates to correspond to the blanking port 25, the corresponding blocking plate 26 opens the storage cavity 241.

[0060] The top side of the forming cavity 44 is open. The top-side opening of the forming cavity 44 is movably corresponding to and communicating with the discharging opening 25 of the storage bin 21. A sealing plate 6 is also provided on the frame 1. The sealing plate 6 movably seals the top-side opening of the forming cavity 44. A discharging plate 61 is slidably arranged on the storage bin 21. The discharging plate 61 receives the raw materials at the discharging opening 25. The discharging plate 61 is movably attached to the top side of the forming cavity 44. An adjusting member 63 for slidably adjusting the discharging plate 61 is also provided on the workbench 11. The adjusting member 63 moves along with the movement of the pressing head 31.

[0061] When commonly performing magnetic core pressing, the raw material powder is stacked on the workbench 11, and then the raw material powder is scraped and swept so that the raw material powder enters the cavity of the mold under the action of gravity, and then the excess raw material powder is scraped off, and then pressing is achieved. By this method, relying solely on the gravity of the raw material powder to fall into the cavity for quantitative control of the raw material powder, it is not easy to control the amount of raw material powder falling each time. Therefore, when there are slight differences in the amount of powder during each pressing, even if the pressing force is the same each time, there will be quality differences. Therefore, by rotatably arranging the storage tray 24 and the partition plate 23 fixed on the storage tray 24, a uniform cavity is formed, so that the amount of raw material powder in each storage cavity 241 is the same. After the storage tray 24 rotates to drop the raw material powder in a storage cavity 241 onto the discharging plate 61, the discharging plate 61 is slid by the provided adjusting member 63, so as to realize the sliding discharging of the raw material powder, and the raw material powder stored in each storage cavity 241 is pushed to the top side of the forming cavity 44, so as to realize the quantitative discharging of the raw material powder. A rotating gear 7 is coaxially provided on the outer peripheral wall of the storage tray 24. A rotating rack 71 is provided on the frame 1. The rotating rack 71 meshes with the rotating gear 471. The rotating gear 7 is a one-way gear and meshes with the rotating rack 71.

[0062] When the pressing head 31 descends to the position of the lower mold 32, the adjusting member 63 drives the discharging plate 61 to move towards the direction close to the storage bin 21, and the sealing plate 6 seals the top side of the forming cavity 44.

[0063] When the pressing head 31 continues to descend for pressing in the height direction, the extrusion blocks 42 close up and the extrusion belt 43 winds up for circumferential pressing. At this time, the sealing plate 6 always keeps sealing the top side of the forming cavity 44.

[0064] When the pressing head 31 rises to the position separated from the lower mold 32, at this time, the storage tray 24 rotates by an angle of a storage cavity 241. At this time, the sealing plate 6 always keeps sealing the top side of the forming cavity 44.

[0065] When the lower press head 31 continues to rise, at this time, the sealing plate 6 is separated from the top side of the forming cavity 44, and the adjusting member 63 drives the blanking plate 61 to slide towards the forming cavity 44.

[0066] The adjusting member 63 includes an adjusting rack 631 slidably disposed on the workbench 11. The adjusting rack 631 is connected to the blanking plate 61. An adjusting gear 632 is rotatably connected to the workbench 11. The adjusting rack 631 meshes with the adjusting gear 632. A second lifting rack 634 is further provided on the frame 1. The second lifting rack 634 is connected to the lower press head 31. A second lifting gear 633 is provided on the workbench 11. The second lifting gear 633 is drivingly connected to the adjusting gear 632. The adjusting rack 631 is partially provided with tooth grooves. When the bottom side of the lower press head 31 is at the same height as the top side of the lower mold 32, at this time, the adjusting rack 631 is separated from the adjusting gear 632. The first lifting rack 53 is also partially provided with tooth grooves. The first lifting rack 53 is movably meshed with the first lifting gear 54. When the first lifting rack 53 slides to mesh with the first lifting gear 54, at this time, the second lifting rack 634 is separated from the second lifting gear 633; when the second lifting rack 634 slides to mesh with the second lifting gear 633, at this time, the first lifting rack 53 is separated from the first lifting gear 54.

[0067] During the process of the lower press head 31 descending until the height of the lower press head 31 is the same as the height of the lower mold 32, during this process, the first lifting rack 53 and the first lifting rack 53 are in a separated state, and the second lifting rack 634 and the second lifting gear 633 are in a meshed state. At this time, the lower press head 31 descends, driving the second lifting rack 634 to descend, driving the second lifting gear 633 to rotate. At this time, the second lifting gear 633 rotates to drive the adjusting gear �32 to rotate, thereby realizing the sliding of the adjusting rack 631 and realizing the operation of the blanking plate 61 moving away from the forming cavity 44, facilitating the subsequent sealing of the forming cavity 44 by the sealing plate 6.

[0068] During the process of the lower press head 31 continuing to descend and extending into the lower mold 32, at this time, the first lifting rack 53 meshes with the first lifting gear 54, and at this time, the second lifting rack 634 is separated from the second lifting gear 633, thereby realizing the approaching and closing of the extrusion block 42 to extrude the magnetic core.

[0069] During the process of the lower press head 31 being pressed and then disengaging from the mold until the bottom end of the lower press head 31 is at the same level as the top end of the lower mold 32, during this process, the first lifting rack 53 drives the first lifting gear 54 to rotate, realizing the relaxation of the extrusion block 42 on the magnetic core and simultaneously realizing the relaxation of the magnetically core after height pressing.

[0070] During the continuous upward movement, the first lifting rack 53 is in a separated state from the first lifting rack 53, and the second lifting rack 634 is in a meshed state with the second lifting gear 633. At this time, the lower pressing head 31 descends, driving the second lifting rack 634 to descend, driving the second lifting gear 633 to rotate. At this time, the rotation of the second lifting gear 633 drives the adjusting gear 632 to rotate, thereby realizing the sliding of the adjusting rack 631. At this time, the blanking plate 61 moves towards the forming cavity 44 under the drive of the adjusting rack 631, realizing the feeding of the raw material powder.

[0071] The implementation principle of an extrusion molding machine for soft ferrite powder cores according to an embodiment of the present application is as follows: when the lower pressing head 31 descends to the position of the lower mold 32, the adjusting member 63 drives the blanking plate 61 to move towards the direction close to the storage tank 21, and the sealing plate 6 seals the top side of the forming cavity 44;

[0072] When the lower pressing head 31 continues to descend for pressing in the height direction, the extrusion blocks 42 close and the extrusion belt 43 winds up for circumferential pressing. At this time, the sealing plate 6 always maintains the sealing of the top side of the forming cavity 44;

[0073] When the lower pressing head 31 ascends to a position separated from the lower mold 32, at this time, the storage tray 24 rotates by an angle of a storage cavity 241. At this time, the sealing plate 6 always maintains the sealing of the top side of the forming cavity 44;

[0074] When the lower pressing head 31 continues to ascend, at this time, the sealing plate 6 is separated from the top side of the forming cavity 44, and the adjusting member 63 drives the blanking plate 61 to slide towards the forming cavity 44.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A soft ferrite powder compacting magnetic core extrusion molding machine, comprising a frame (1) and a workbench (11) provided on the frame (1), characterized in that: A quantitative component (2), a circumferential extrusion component (4) and a height extrusion component (3) are further arranged on the frame (1); The height extrusion component (3) includes a lower pressing head (31) arranged on the frame (1) in a lifting manner and a lower die (32) arranged on the workbench (11). A power component for lifting and adjusting the lower pressing head (31) is further arranged on the frame (1); The circumferential extrusion component (4) includes an extrusion cylinder (41) arranged on the frame (1), an extrusion block (42) slidably arranged on the extrusion cylinder (41), and a sliding component (45) for sliding and adjusting the extrusion block (42). There are multiple groups of the extrusion blocks (42). The multiple groups of the extrusion blocks (42) move close to / away from each other. When the multiple groups of the extrusion blocks (42) approach each other, they enclose a circular forming cavity (44). An extrusion belt (43) is also movably arranged in the extrusion cylinder (41). The extrusion belt (43) is made of an elastic material, and the size of the extrusion belt (43) is movably consistent with that of the forming cavity (44); A synchronizing component (5) for synchronously adjusting and driving the extrusion block (42) and the lower pressing head (31) is further arranged on the frame (1); The quantitative component (2) includes a material storage tank (21) arranged on the frame (1). A discharge port (22) is formed at the bottom of the material storage tank (21). A material storage disk (24) is rotatably arranged in the material storage tank (21). A plurality of partition plates (23) are arranged on the material storage disk (24). There are multiple partition plates (23). The multiple partition plates (23) are arranged at intervals along the circumferential direction of the material storage disk (24). Adjacent two partition plates (23) enclose a material storage cavity (241) for one-time blanking. A blanking port (25) is formed on the material storage tank (21). A blocking plate (26) is rotatably arranged at the blanking port (25) of the material storage disk (24). When the blocking plate (26) rotates to correspond to the blanking port (25), the corresponding blocking plate (26) opens the material storage cavity (241); When the lower pressing head (31) descends and ascends for one cycle, the material storage disk (24) rotates by an angle of one material storage cavity (241).

2. The extrusion molding machine for soft ferrite compact magnetic cores according to claim 1, wherein: The sliding member (45) includes a rotating disk (451) rotatably disposed in the workbench (11) and a fixed disk (452) fixed in the workbench (11). A sliding groove (454) is formed in the fixed disk (452), and the opening direction of the sliding groove (454) is consistent with the radial direction of the forming cavity (44). A sliding rod (455) is provided on the extrusion block (42), and the sliding rod (455) is slidably matched with the sliding groove (454). A rotating groove (453) is formed in the rotating disk (451), and the rotating groove (453) is arranged obliquely along the radial direction of the forming cavity (44). The sliding rod (455) is slidably disposed in the rotating groove (453). Multiple groups of the sliding grooves (454) and the rotating grooves (453) are formed, and multiple groups of the sliding grooves (454) correspond to the multiple extrusion blocks (42) one by one.

3. A soft ferrite powder magnetic core extrusion molding machine according to claim 2, characterized in that: A receiving roller (46) is rotatably disposed on the frame (1). One end of the extrusion belt (43) is wound around the receiving roller (46), and the other end of the extrusion belt (43) penetrates through one of the extrusion blocks (42) and is fixedly connected to this extrusion block (42). When the rotating disk (451) rotates to make the multiple extrusion blocks (42) approach each other, the receiving roller (46) rotates to wind the extrusion belt (43). A synchronous member (47) for synchronously adjusting the receiving roller (46) and the extrusion blocks (42) is further provided on the frame (1).

4. A soft ferrite compacted powder magnetic core extrusion molding machine according to claim 3, characterized in that: The synchronous member (47) includes a synchronous gear (471) rotatably disposed in the workbench (11). The synchronous gear (471) is coaxially arranged with the receiving roller (46). A synchronous toothed ring is coaxially provided on the rotating disk (451), and the synchronous gear (471) meshes with the synchronous toothed ring.

5. A soft ferrite powder compacting magnetic core extrusion molding machine according to claim 4, characterized in that: The synchronizing member (5) includes a synchronous rack (51) slidably disposed on the workbench (11). The synchronous rack (51) meshes with the synchronous toothed ring. A first lifting rack (53) is slidably disposed on the frame (1). The first lifting rack (53) is connected to the lower pressing head (31). A first lifting gear (54) is rotatably connected to the frame (1). The first lifting gear (54) meshes with the first lifting rack (53). A synchronous gear (52) is provided on the workbench (11). The synchronous gear (52) meshes with the synchronous rack (51), and the synchronous gear (52) is drivingly connected to the first lifting gear (54).

6. The extrusion molding machine for soft ferrite compact magnetic cores according to claim 5, wherein: The top side of the forming cavity (44) is open, and the top-side opening of the forming cavity (44) is movably corresponding to and communicating with the material discharge port (25) of the storage bin (21). A sealing plate (6) is further provided on the machine frame (1), and the sealing plate (6) movably seals the top-side opening of the forming cavity (44). A material discharge plate (61) is slidably arranged on the storage bin (21), and the material discharge plate (61) receives the raw materials discharged from the material discharge port (25). The material discharge plate (61) is movably attached to the top side of the forming cavity (44). An adjusting member (63) for slidably adjusting the material discharge plate (61) is further provided on the workbench (11), and the adjusting member (63) moves along with the movement of the pressing head (31).

7. The extrusion molding machine for soft ferrite compacted powder cores according to claim 6, wherein: When the pressing head (31) descends to the position of the lower mold (32), the adjusting member (63) drives the material discharge plate (61) to move towards the storage bin (21), and the sealing plate (6) seals the top side of the forming cavity (44). When the pressing head (31) continues to descend for pressing in the height direction, the extrusion blocks (42) close up and the extrusion belt (43) winds up for circumferential pressing. At this time, the sealing plate (6) always keeps sealing the top side of the forming cavity (44). When the pressing head (31) ascends to the position separated from the lower mold (32), at this time, the storage tray (24) rotates by an angle of a storage cavity (241). At this time, the sealing plate (6) always keeps sealing the top side of the forming cavity (44). When the pressing head (31) continues to ascend, at this time, the sealing plate (6) is separated from the top side of the forming cavity (44), and the adjusting member (63) drives the material discharge plate (61) to slide towards the forming cavity (44).

8. A soft ferrite powder compacting magnetic core extrusion molding machine according to claim 7, characterized in that: The adjusting member (�) includes an adjusting rack (631) slidably arranged on the workbench (11). The adjusting rack (631) is connected to the material discharge plate (61). An adjusting gear (632) is rotatably connected to the workbench (11). The adjusting rack (631) meshes with the adjusting gear (632). A second lifting rack (634) is further provided on the machine frame (1). The second lifting rack (634) is connected to the pressing head (31). A second lifting gear (633) is provided on the workbench (11). The second lifting gear (633) is in transmission connection with the adjusting gear (632). Tooth grooves are partially formed on the adjusting rack (631). When the bottom side of the pressing head (31) is at the same height as the top side of the lower mold (32), at this time, the adjusting rack (631) is separated from the adjusting gear (632). Tooth grooves are also partially formed on the first lifting rack (53), and the first lifting rack (53) is movably meshed with the first lifting gear (54). When the first lifting rack (53) slides to engage with the first lifting gear (54), at this time the second lifting rack (634) is separated from the second lifting gear (633); When the second lifting rack (634) slides to engage with the second lifting gear (633), at this time the first lifting rack (53) is separated from the first lifting gear (54).

9. A soft ferrite powder compacting magnetic core extrusion molding machine according to claim 8, characterized in that: A rotating gear (7) is coaxially provided on the outer peripheral wall of the storage tray (24), a rotating rack (71) is provided on the frame (1), the rotating rack (71) meshes with the synchronous gear (471), and the rotating gear (7) is a one-way gear and meshes with the rotating rack (71).

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