Soft magnetic ferrite powder magnetic core extrusion forming machine

Abstract

The invention relates to a soft magnetic ferrite powder magnetic core extrusion forming machine, and relates to the technical field of transformer magnetic core pressing, the soft magnetic ferrite powder magnetic core extrusion forming machine comprises a rack and a workbench arranged on the rack, and the rack is also provided with a quantification assembly, a circumferential extrusion assembly and a height extrusion assembly; the height extrusion assembly comprises a lower pressing head arranged on the rack in a lifting mode and a lower die arranged on the workbench. The rack is further provided with a power piece for conducting lifting adjustment on the lower pressing head. The circumferential extrusion assembly comprises an extrusion cylinder arranged on the rack, extrusion blocks arranged on the extrusion cylinder in a sliding mode and a sliding part for conducting sliding adjustment on the extrusion blocks, a circular forming cavity is defined when the multiple sets of extrusion blocks get close to one another, and an extrusion belt is further movably arranged in the extrusion cylinder and is made of an elastic material; and the extrusion belt and the forming cavity are movably consistent in size. The magnetic core pressing device has the advantages that the magnetic core can be pressed in the diameter direction and the height direction during pressing, and therefore the performance of the magnetic core in the diameter direction and the height direction is uniform.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic core pressing equipment, and in particular to a soft ferrite powder magnetic core extrusion molding machine. Background Art

[0002] Soft ferrite core is a high-performance magnetic material commonly used in electronic equipment. It has excellent magnetic and electrical properties. It is mainly made of soft magnetic ferrite material and is usually used to manufacture transformers, inductors, filters, sensors and other electronic components. At present, with the rapid development of power construction equipment, soft ferrite cores are also used in power cable equipment and transformer inductance coils.

[0003] A Chinese patent document with publication number CN221805296U discloses a device for manufacturing pressed powder magnetic cores, including a frame, a workbench installed on the frame, a compacting template installed on the workbench, a processing groove on the compacting template, a shoveling strip slidably connected to the workbench, two limit strips connected in parallel to the upper end surface of the workbench, both ends of the shoveling strip are connected to sliding blocks, each sliding block is provided with a limit hole for the limit strip to pass through, a positioning block is connected to the sliding block, both end portions of the shoveling strip are provided with positioning grooves for the positioning block to be inserted and slide, an adjusting screw is threadedly connected to the positioning block, and the upper end of the adjusting screw is connected to a limit plate.

[0004] With respect to the above-mentioned related technologies, when the magnetic core is pressed, the mixed raw materials are often filled into a processing groove, and then pressed down to the processing groove by an upper pressing head for pressing and forming. At this time, the raw material powder often only produces a volume change in the height direction during the pressing process of the upper pressing head, while the volume change in the diameter direction depends on the suppression of the ductility produced along the diameter direction when the magnetic core is pressed. Therefore, there is an uneven problem between the strength in the height direction and the strength in the diameter direction, which affects the strength of the subsequent magnetic core after forming. Summary of the invention

[0005] In order to facilitate the pressing of the magnetic core in both the diameter direction and the height direction, thereby making the performance of the magnetic core in the diameter direction and the height direction uniform, the present application provides a soft ferrite powder core extrusion molding machine.

[0006] The soft ferrite powder core extrusion molding machine provided in the present application adopts the following technical solution: A soft ferrite powder core extrusion molding machine comprises a frame, a workbench arranged on the frame, the frame is also provided with a quantitative component, a circumferential extrusion component and a height extrusion component; the height extrusion component comprises a lower pressure head arranged on the frame in a lifting manner and a lower mold arranged on the workbench, and the frame is also provided with a power component for lifting and lowering the lower pressure head; the circumferential extrusion component comprises 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, the extrusion blocks are provided with multiple groups, the multiple groups of extrusion blocks are movable to approach / move away, and the multiple groups of extrusion blocks are close to each other to enclose a circular molding cavity, the extrusion cylinder is also movably provided with an extrusion belt, the extrusion belt is made of elastic material, and the extrusion belt is connected to the The size of the forming cavities is consistent; the frame is also provided with a synchronization part for synchronously adjusting and driving the extrusion block and the lower pressure head; the quantitative component includes a storage box arranged on the frame, a discharge port is provided at the bottom of the storage box, and a storage tray is rotatably arranged in the storage box, a plurality of partitions are provided on the storage tray, and a plurality of partitions are provided, and a plurality of the partitions are arranged at intervals along the circumference direction of the storage tray, and two adjacent partitions enclose a storage cavity for unloading at one time, and a unloading port is provided on the storage box, and a sealing plate is rotatably provided at the unloading port of the storage tray, and when the sealing plate rotates to correspond to the unloading port, the corresponding sealing plate opens the storage cavity; when the lower pressure head descends and rises for a cycle, the storage tray rotates by the angle of a storage cavity.

[0007] By adopting the above technical scheme, when the magnetic core is extruded and formed, the raw material powder in the storage box falls onto the storage tray through the discharge port, and due to the multiple evenly spaced partitions arranged on the storage tray, the raw material powder in the storage cavity is completely filled with equal amounts of raw material powder. Then, by rotating the storage tray, when it is necessary to discharge the material, when the storage tray rotates, when the corresponding storage cavity rotates to the discharge port, the corresponding sealing plate rotates to open the discharge port, so that the raw material in the corresponding storage cavity is discharged through the discharge port and falls into the molding cavity. At this time, when extruding, the multiple extrusion blocks slide close to each other, and at the same time drive the extrusion belt to close, so as to realize the circumferential extrusion of the raw material powder, and perform a first pressing. The pressed product is moved to the lower mold and is pressed for a second time by the set lower pressure head.

[0008] And every time the pressure head descends and rises for a cycle, the storage tray rotates by an angle of the storage cavity.

[0009] At the same time, due to the single-press molding, a high temperature rise will be generated, which will easily cause the performance of the binder in the raw powder to change, reducing the bonding strength. In addition, the magnetic permeability and magnetic induction intensity will decrease at high temperatures, indirectly affecting the bonding performance of the raw powder during pressing.

[0010] 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.

[0011] Through the above technical scheme, a two-time pressing molding method is adopted to reduce the influence of high temperature generated by a single pressing on the bonding performance. At the same time, a circumferential extrusion and a height extrusion method are adopted twice to make the pore density of the product in the height direction and the radial direction after molding uniform, thereby improving the uniformity of the strength performance indicators of the product after molding.

[0012] Optionally, the sliding member includes a rotating disk rotatably arranged in the frame, the frame is provided with a sliding groove, the opening direction of the sliding groove is consistent with the radial direction of the molding cavity, the extrusion block is provided with a sliding rod, the sliding rod is slidably adapted to the sliding groove, the rotating disk is provided with a rotating groove, the rotating groove is obliquely arranged along the radial direction of the molding cavity, the sliding rod is slidably arranged in the rotating groove, the sliding groove and the rotating groove are both provided with multiple groups, and the multiple groups of sliding grooves correspond one-to-one to the multiple extrusion blocks.

[0013] 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 the multiple extrusion blocks are close to each other, thereby realizing the circumferential extrusion of the raw material powder.

[0014] 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.

[0015] Optionally, a receiving roller is rotatably provided on the frame, one end of the extrusion belt is wound around the receiving 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 receiving roller rotates to wind the extrusion belt. The frame is also provided with a synchronous moving part for synchronously adjusting the receiving roller and the extrusion block.

[0016] 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 member, 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.

[0017] An extrusion block is set to extrude the extrusion belt, so that the pressed magnetic core can be stably formed into a cylindrical shape. During the extrusion process, the raw material powder will extrude the extrusion belt toward the inner wall of the extrusion block, so that the extrusion belt and the inner wall of the extrusion block are stably fitted, thereby improving the outer surface quality of the pressed magnetic core.

[0018] Optionally, the co-moving member includes a co-moving gear arranged in the rotating plate in the workbench, the co-moving gear is coaxially arranged with the storage 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.

[0019] 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 engage with the synchronous gear rotates, thereby driving the storage roller to rotate, thereby realizing the storage or release operation of the extrusion belt by the storage roller, and realizing the synchronous sliding of the extrusion block and the storage or release of the extrusion belt.

[0020] Optionally, the synchronous part includes a synchronous rack slidably set on the workbench, the synchronous 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 meshed with the lifting rack, and a synchronous gear is provided on the workbench, the synchronous gear is meshed with the synchronous rack, and the synchronous gear is transmission connected to the lifting gear.

[0021] By adopting the above technical scheme, 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 with 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.

[0022] At the same time, a power source is set up to realize the synchronization of the first pressing and the second pressing, which saves the power source. The pressing pressure of the first pressing and the second pressing is controlled by this setting, the synchronization and uniformity of the circumferential pressing and the height pressing are improved, and the problem of uneven circumferential performance and height performance caused by the asynchrony of the circumferential extrusion force and the height extrusion force is reduced, thereby improving the quality of the magnetic core production.

[0023] Optionally, the top side of the molding cavity is open, and the top side opening of the molding cavity movably corresponds to and is connected with a discharge port of the storage box. The frame is also provided with a sealing plate, which movably blocks the top side opening of the molding cavity, and 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, and 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.

[0024] By adopting the above technical scheme, 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 realize pressing. In this way, the raw material powder relies on its own gravity to fall into the cavity for quantitative determination of the raw material powder, and 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 unloading plate, the unloading plate is slid by the adjusting member, so as to realize sliding unloading of the raw material powder, and push the raw material powder stored in each storage cavity to the top side of the molding cavity, so as to realize quantitative unloading of the raw material powder.

[0025] At the same time, through the setting of the sealing plate, after the material is unloaded, the lower pressure head descends and drives the sealing plate to descend, thereby sealing the top side of the molding cavity, thereby facilitating the subsequent circumferential extrusion to reduce the overflow of raw material powder from the top side of the molding cavity and improve the stability of the circumferential extrusion.

[0026] Optionally, when the lower pressure head descends to the position of the lower mold, the adjusting member drives the lowering plate to move toward the direction close to the material storage box, and the sealing plate blocks the top side of the molding cavity; When the lower pressure head continues to descend to perform compression in the height direction, the extrusion block closes and the extrusion belt is rolled up to perform circumferential compression, and at this time, the sealing plate always keeps the top side of the molding cavity blocked; When the lower pressure head rises to a position separated from the lower mold, the rotating disk rotates an angle of the material storage cavity, and the sealing plate always keeps blocking the top side of the molding cavity; When the lower pressure head continues to rise, the sealing plate is separated from the top side of the molding cavity, and the adjusting member drives the blanking plate to slide toward the molding cavity.

[0027] By adopting the above technical scheme, the above four processes, including the sealing of the molding cavity, circumferential pressing and height pressing, unloading of the material storage box, and unloading of the molding cavity, are realized. The four processes are carried out continuously by lowering a lower pressure head, thereby reducing the control cost, thereby improving the continuity of the entire pressing process and reducing the pressing time cost caused by the secondary pressing.

[0028] 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 with 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 with 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 in height, the adjusting rack is separated from the adjusting gear, 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; When the first lifting rack slides to be engaged with the first lifting gear, the second lifting rack is separated from the second lifting gear; When the second lifting rack slides to be engaged with the second lifting gear, the first lifting rack is separated from the first lifting gear.

[0029] 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 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 moving the blanking plate away from the molding cavity, and facilitating the subsequent sealing plate to seal the molding cavity.

[0030] When the lower pressure head continues to descend and extend into the lower mold, the first lifting rack is meshed 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.

[0031] When the lower ram is separated from the mold after pressing until the height of the bottom of the lower ram is flush with the height of the top of the lower mold, the first lifting rack drives the first lifting gear to rotate, thereby relaxing the extrusion block on the magnetic core and relaxing the magnetic core after high pressing.

[0032] During the continued rising process, the first lifting rack is in a separated state, and the second lifting rack is in a meshing state with the second lifting gear. At this time, the lower pressure head descends, driving the second lifting rack to descend, driving the second lifting gear to rotate. At this time, the rotation of the second lifting gear drives the adjusting gear to rotate, thereby realizing the sliding of the adjusting rack. At this time, the unloading plate moves toward the molding cavity driven by the adjusting rack to realize the loading of the raw material powder.

[0033] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the high extrusion assembly, circumferential extrusion assembly and synchronous parts, when the magnetic core is pressed and formed, the synchronous parts are set, and when the lower pressure head is driven down, the first circumferential extrusion of the raw material powder and the second high extrusion are realized synchronously under the action of the synchronous parts, thereby reducing power waste; 2. Through the provided rotating disk, fixed disk, rotating groove provided on the rotating disk and sliding groove provided on the fixed disk, when circumferential extrusion and pressing are required, when the rotating disk is rotated, the plurality of sliding rods are driven to approach / move away from each other under the limiting action of the rotating groove and the sliding groove, thereby realizing circumferential extrusion and relaxation; 3. Through the set extrusion belt, the storage roller for storing the extrusion belt and the synchronous moving part, while circumferential extrusion is carried out, the synchronous moving part drives the extrusion block and the storage roller to move synchronously, the storage roller rotates to rotate and store the extrusion belt, and the set extrusion belt reduces the overflow of raw material powder from the gap of the extrusion block. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of a soft ferrite powder core extrusion molding machine according to an embodiment of the present application; Figure 2 It is a schematic diagram of the connection structure of a soft ferrite powder core extrusion molding machine from another perspective in an embodiment of the present application; Figure 3 It is a schematic diagram of the connection structure of the synchronizer; Figure 4 is a schematic diagram of the connection structure of the sliding member; Figure 5 It is a schematic diagram of the connection structure of the storage box and the storage tray.

[0035] Reference numerals: 1, frame; 11, workbench; 2, quantitative assembly; 21, storage box; 22, discharge port; 23, partition; 24, storage tray; 241, storage cavity; 25, discharge port; 26, blocking plate; 3, height extrusion assembly; 31, lower pressure head; 32, lower mold; 33, mold hole; 34, lower pressure plate; 4, circumferential extrusion assembly; 41, extrusion cylinder; 42, extrusion block; 43, extrusion belt; 44, molding 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, synchronous member; 51, synchronous rack; 52, synchronous gear; 53, first lifting rack; 54, first lifting gear; 6, sealing plate; 61, unloading 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 DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] The present application embodiment discloses a soft ferrite powder core extrusion molding machine. Figure 1 A soft ferrite powder core extrusion molding machine includes a vertically fixed frame 1, a workbench 11 is horizontally fixed on the frame 1, and the frame 1 is also provided with a quantitative component 2 for quantitatively adding raw material powder, a circumferential extrusion component 4 for circumferentially extruding the raw material powder, and a height extrusion component 3 for height extrusion of the raw material powder.

[0038] Reference Figure 1 and Figure 2 The height extrusion assembly 3 includes a lower pressure head 31 which is lifted and arranged on the frame 1. A lower mold 32 is fixedly connected to the workbench 11. The lower pressure head 31 and the lower mold 32 are arranged opposite to each other, and the lower pressure head 31 and the lower mold 32 are arranged correspondingly. The frame 1 is also provided with a power member for lifting and lowering the lower pressure head 31. In the present 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 pressure head 31, and the second lifting plate is connected to the output end of the power member. In the present application, the power member is a hydraulic cylinder.

[0039] Reference Figure 2 and Figure 3The circumferential extrusion assembly 4 is fixed to an extrusion cylinder 41 on the frame 1, and an extrusion block 42 is slidably arranged on the workbench 11. The extrusion block 42 is provided with multiple groups, and the multiple groups of extrusion blocks 42 enclose a circular molding cavity 44. The multiple groups of extrusion blocks 42 are evenly spaced along the circumference direction of the molding cavity 44, and the extrusion cylinder 41 and the extrusion blocks 42 are arranged on one side of the lower mold 32. In the present application, there are three groups of extrusion blocks 42, and the extrusion blocks 42 on the side away from the lower mold 32 are fixedly arranged, and the other two groups of extrusion blocks 42 are slidably arranged, and the sliding direction of the extrusion blocks 42 is consistent with the radial direction of the molding cavity 44. A sliding member 45 for slidingly adjusting the extrusion blocks 42 is also provided on the workbench 11, and the sliding member 45 includes a rotating A rotating disk 451 is arranged on the workbench 11 and a fixed disk 452 is fixed on the workbench 11. The fixed disk 452 is coaxially arranged with the rotating disk 451. A sliding groove 454 is provided on the fixed disk 452. The opening direction of the sliding groove 454 is consistent with the radial direction of the molding cavity 44. A sliding rod 455 is provided on the extrusion block 42. The sliding rod 455 is slidably adapted to the sliding groove 454. A rotating groove 453 is provided on the rotating disk 451. The rotating groove 453 is tilted along the radial direction of the molding 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 provided. Multiple groups of sliding grooves 454 correspond one to one to multiple extrusion blocks 42.

[0040] When it is necessary to circumferentially extrude the raw materials, the technicians rotate the rotating disk 451. At this time, under the limitation of the inclined rotating groove 453, the sliding rod 455 is driven to slide toward the center of the rotating disk 451, so that the multiple extrusion blocks 42 are close to each other, thereby realizing the circumferential extrusion of the raw material powder.

[0041] At the same time, in order to realize the extrusion of the raw material powder, an extrusion belt 43 is movably arranged in the extrusion cylinder 41. The extrusion belt 43 is made of elastic material. The extrusion belt 43 is consistent in size with the molding 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, and the other end of the extrusion belt 43 passes through an extrusion block 42 and is fixedly connected to the extrusion block 42. When the rotating disk 451 rotates until multiple extrusion blocks 42 are close to each other, the storage roller 46 rotates to wind the extrusion belt 43. The frame 1 is also provided with a synchronous moving part 47 for synchronously adjusting the storage roller 46 and the extrusion block 42.

[0042] The co-moving member 47 includes a co-moving gear 471 rotatably disposed in the workbench 11 . The co-moving gear 471 is coaxially arranged with the receiving roller 46 . A co-moving gear ring 472 is coaxially disposed on the rotating disk 451 . The co-moving gear 471 meshes with the co-moving gear ring 472 .

[0043] When the rotating disk 451 rotates to slide and adjust the position of the extrusion block 42, the rotating disk 451 rotates to drive the synchronous gear ring 472 to rotate, and the synchronous gear ring 472 rotates to rotate the meshing synchronous gear 471, thereby driving the storage roller 46 to rotate, and the extrusion block 42 is set to extrude the extrusion belt 43, so that the pressed magnetic core is stably formed into a cylindrical shape. During the extrusion process, the raw material powder will extrude the extrusion belt 43 toward the inner wall of the extrusion block 42, so that the extrusion belt 43 and the inner wall of the extrusion block 42 are stably fitted, thereby improving the outer surface quality of the pressed magnetic core.

[0044] At the same time, in order to save power source and realize synchronous circumferential pressing and height pressing, the frame 1 is also provided with a synchronous member 5 for synchronously adjusting and driving the extrusion block 42 and the lower pressure head 31. The synchronous member 5 includes a synchronous rack 51 slidably set on the workbench 11, and the synchronous rack 51 is meshed with the synchronous gear ring 472. A first lifting rack 53 is slidably set on the frame 1, and the first lifting rack 53 is connected to the lower pressure head 31. A first lifting gear 54 is rotatably connected to the frame 1, and the first lifting gear 54 is meshed with the first lifting rack 53. A synchronous gear 52 is provided on the workbench 11, and the synchronous gear 52 is meshed with the synchronous rack 51, and the synchronous gear 52 is transmission-connected to the first lifting gear 54.

[0045] When the power part drives the lower pressure head 31 to descend for secondary pressing, at this time, the lower pressure head 31 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 with the synchronous driving gear, when the lifting rack descends, it drives the synchronous driving gear to rotate, and 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 pressure head 31 drives the extrusion block 42 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.

[0046] Reference Figure 1 and Figure 3 The quantitative component 2 includes a material storage box 21 arranged on the frame 1, and a discharge port 22 is provided at the bottom of the material storage box 21. A material storage tray 24 is rotatably arranged in the material storage box 21, and a plurality of partitions 23 are provided on the material storage tray 24. The partitions 23 are provided with a plurality of partitions 23, and the plurality of partitions 23 are arranged at intervals along the circumference direction of the material storage tray 24. Two adjacent partitions 23 enclose a material storage cavity 241 for unloading at one time. A material unloading port 25 is provided on the material storage box 21, and a sealing plate 26 is rotatably provided at the material unloading port 25 of the material storage tray 24. When the sealing plate 26 rotates to correspond to the unloading port 25, the corresponding sealing plate 26 opens the material storage cavity 241.

[0047] The top side of the molding cavity 44 is open, and the top side opening of the molding cavity 44 is movably corresponding to and connected with the discharge port 25 of the storage box 21. A sealing plate 6 is also provided on the frame 1, and the sealing plate 6 movably blocks the top side opening of the molding cavity 44. A discharge plate 61 is also slidably provided on the storage box 21, and the discharge plate 61 receives the raw materials discharged from the discharge port 25. The discharge plate 61 is movably fitted with the top side of the molding cavity 44. An adjusting member 63 for slidingly adjusting the discharge plate 61 is also provided on the workbench 11, and the adjusting member 63 moves with the movement of the lower pressure head 31.

[0048] In common magnetic core pressing, raw material powder is piled on the workbench 11, and then the raw material powder is scraped and swept to enter the cavity of the mold under the action of gravity, and then the excess raw material powder is scraped off, and then pressing is performed. In this way, the raw material powder is quantitatively measured by relying on its own gravity to fall into the cavity, and it is difficult 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 pressing force is the same each time, there will be a difference in quality. Therefore, by rotating The material storage tray 24 and the partition 23 fixed on the material storage tray 24 form uniform cavities one by one, so that the amount of raw material powder in each material storage cavity 241 is consistent. After the material storage tray 24 rotates to drop the raw material powder in a material storage cavity 241 onto the unloading plate 61, the unloading plate 61 is slid by the adjustment member 63, so as to realize the sliding unloading of the raw material powder, and push the raw material powder stored in each material storage cavity 241 to the top side of the forming cavity 44, so as to realize the quantitative unloading of the raw material powder. A rotating gear 7 is coaxially provided on the outer peripheral wall of the material storage tray 24, and a rotating rack 71 is provided on the frame 1, and the rotating rack 71 is meshed with the co-moving gear 471, and the rotating gear 7 is a one-way gear and meshed with the rotating rack 71.

[0049] When the lower ram 31 descends to the position of the lower mold 32, the adjusting member 63 drives the blanking plate 61 to move toward the direction close to the material storage box 21, and the sealing plate 6 blocks the top side of the molding cavity 44; When the lower pressure head 31 continues to descend to perform compression in the height direction, the extrusion block 42 closes and the extrusion belt 43 is rolled up to perform circumferential compression. At this time, the sealing plate 6 always keeps the top side of the molding cavity 44 blocked; When the lower ram 31 rises to a position separated from the lower mold 32, the material storage tray 24 rotates an angle of the material storage cavity 241, and the sealing plate 6 always keeps blocking the top side of the molding cavity 44; When the lower pressure head 31 continues to rise, the sealing plate 6 is separated from the top side of the molding cavity 44 , and the adjusting member 63 drives the blanking plate 61 to slide toward the molding cavity 44 .

[0050] The adjusting member 63 includes an adjusting rack 631 slidably arranged 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 is meshed with the adjusting gear 632, a second lifting rack 634 is also provided on the frame 1, the second lifting rack 634 is connected to the lower pressure head 31, a second lifting gear 633 is provided on the workbench 11, the second lifting gear 633 is transmission-connected with the adjusting gear 632, a tooth groove is partially opened on the adjusting rack 631, when the bottom side of the lower pressure head 31 is consistent with the top side of the lower mold 32 in height, the adjusting rack 631 is separated from the adjusting gear 632, a tooth groove is also partially opened 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 mesh with the first lifting gear 54, 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, the first lifting rack 53 is separated from the first lifting gear 54.

[0051] During the process of the lower pressure head 31 descending until the height of the lower pressure head 31 is consistent with 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 meshing state. At this time, the lower pressure head 31 descends, driving the second lifting rack 634 to descend, driving the second lifting gear 633 to rotate, and 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, and realizing the operation of moving the blanking plate 61 away from the molding cavity 44, which is convenient for the subsequent sealing plate 6 to seal the molding cavity 44.

[0052] When the lower pressure head 31 continues to descend and extend into the lower mold 32, the first lifting rack 53 is meshed with the first lifting gear 54, and the second lifting rack 634 is separated from the second lifting gear 633, so that the extrusion block 42 is brought closer and closer to extrude the magnetic core.

[0053] When the lower punch 31 is separated from the mold after pressing until the height of the bottom end of the lower punch 31 is flush with the height of the top end of the lower mold 32, the first lifting rack 53 drives the first lifting gear 54 to rotate, thereby relaxing the magnetic core by the extrusion block 42 and relaxing the magnetic core after high pressing.

[0054] During the continued rising process, 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 meshing state with the second lifting gear 633. At this time, the lower pressure 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 unloading plate 61 is driven by the adjusting rack 631 to move toward the molding cavity 44 to realize the loading of the raw material powder.

[0055] The implementation principle of the soft ferrite powder core extrusion molding machine of the 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 toward the direction close to the storage box 21, and the sealing plate 6 blocks the top side of the molding cavity 44; When the lower pressure head 31 continues to descend to perform compression in the height direction, the extrusion block 42 closes and the extrusion belt 43 is rolled up to perform circumferential compression. At this time, the sealing plate 6 always keeps the top side of the molding cavity 44 blocked; When the lower ram 31 rises to a position separated from the lower mold 32, the material storage tray 24 rotates an angle of the material storage cavity 241, and the sealing plate 6 always keeps blocking the top side of the molding cavity 44; When the lower pressure head 31 continues to rise, the sealing plate 6 is separated from the top side of the molding cavity 44 , and the adjusting member 63 drives the blanking plate 61 to slide toward the molding cavity 44 .

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A soft ferrite powder core extrusion molding machine, comprising a frame (1) and a workbench (11) arranged on the frame (1), characterized in that: The frame (1) is also provided with a quantitative component (2), a circumferential extrusion component (4) and a height extrusion component (3); The height extrusion assembly (3) comprises a lower pressing head (31) which is lifted and arranged on the frame (1) and a lower die (32) which is arranged on the workbench (11); the frame (1) is also provided with a power part for lifting and lowering the lower pressing head (31); The circumferential extrusion assembly (4) comprises an extrusion cylinder (41) arranged on the frame (1), an extrusion block (42) slidably arranged on the extrusion cylinder (41), and a sliding member (45) for slidingly adjusting the extrusion block (42), wherein the extrusion blocks (42) are provided in a plurality of groups, the plurality of groups of extrusion blocks (42) are movable to move closer to / away from each other, and when the plurality of groups of extrusion blocks (42) are close to each other, they enclose a circular forming cavity (44), and an extrusion belt (43) is movably arranged in the extrusion cylinder (41), the extrusion belt (43) is made of elastic material, and the size of the extrusion belt (43) and the forming cavity (44) are movable in the same manner; The frame (1) is also provided with a synchronizing member (5) for synchronously adjusting and driving the extrusion block (42) and the lower pressing head (31); The quantitative component (2) comprises a material storage box (21) arranged on the frame (1), the bottom of the material storage box (21) is provided with a material discharge port (22), a material storage tray (24) is rotatably arranged in the material storage box (21), a plurality of partitions (23) are provided on the material storage tray (24), a plurality of the partitions (23) are provided, the plurality of the partitions (23) are arranged at intervals along the circumference direction of the material storage tray (24), two adjacent partitions (23) are combined to form a material storage cavity (241) for unloading at one time, a material unloading port (25) is provided on the material storage box (21), a sealing plate (26) is rotatably arranged on the material unloading port (25), and when the sealing plate (26) is rotated to correspond to the material unloading port (25), the corresponding sealing plate (26) opens the material storage cavity (241); When the lower pressure head (31) descends and ascends for a cycle, the material storage tray (24) rotates by an angle of the material storage cavity (241).

2. The soft ferrite powder core extrusion molding machine according to claim 1, characterized in that: The sliding member (45) comprises a rotating disk (451) rotatably arranged in the workbench (11) and a fixed disk (452) fixed in the workbench (11); a sliding groove (454) is provided on the fixed disk (452); the opening direction of the sliding groove (454) is consistent with the radial direction of the molding cavity (44); a sliding rod (455) is provided on the extrusion block (42); the sliding rod (455) is slidably adapted to the sliding groove (454); a rotating groove (453) is provided on the rotating disk (451); the rotating groove (453) is obliquely arranged along the radial direction of the molding cavity (44); the sliding rod (455) is slidably arranged in the rotating groove (453); the sliding groove (454) and the rotating groove (453) are both provided with multiple groups; the multiple groups of sliding grooves (454) correspond one-to-one to the multiple extrusion blocks (42).

3. The soft ferrite powder core extrusion molding machine according to claim 2, characterized in that: A receiving roller (46) is rotatably arranged on the frame (1); one end of the extrusion belt (43) is wound around the receiving roller (46); the other end of the extrusion belt (43) passes through one of the extrusion blocks (42) and is fixedly connected to the extrusion block (42); when the rotating disk (451) rotates until the plurality of extrusion blocks (42) are close to each other, the receiving roller (46) rotates to wind the extrusion belt (43); and a synchronous moving member (47) for synchronously adjusting the receiving roller (46) and the extrusion block (42) is also arranged on the frame (1).

4. The soft ferrite powder core extrusion molding machine according to claim 3, characterized in that: The co-moving member (47) comprises a co-moving gear (471) arranged in the rotating plate (11), the co-moving gear (471) being coaxially arranged with the storage roller (46), a co-moving gear ring being coaxially arranged on the rotating plate (451), and the co-moving gear (471) being meshed with the co-moving gear ring.

5. The soft ferrite powder core extrusion molding machine according to claim 4, characterized in that: The synchronous member (5) comprises a synchronous rack (51) slidably arranged on the workbench (11), the synchronous rack (51) meshing with the synchronous gear ring, a first lifting rack (53) slidably arranged on the frame (1), the first lifting rack (53) being connected to the lower pressure head (31), a first lifting gear (54) being rotatably connected to the frame (1), the first lifting gear (54) being meshing with the first lifting rack (53), and a synchronous gear (52) being arranged on the workbench (11), the synchronous gear (52) being meshing with the synchronous rack (51), and the synchronous gear (52) being transmission-connected with the first lifting gear (54).

6. The soft ferrite powder core extrusion molding machine according to claim 5, characterized in that: The top side of the molding cavity (44) is in an open shape, and the top side opening of the molding cavity (44) is movably corresponding to and connected with the discharge port (25) of the material storage box (21). The frame (1) is also provided with a sealing plate (6), and the sealing plate (6) movably blocks the top side opening of the molding cavity (44). The material storage box (21) is also slidably provided with a discharge plate (61), and the discharge plate (61) receives the raw material discharged from the discharge port (25). The discharge plate (61) is movably fitted with the top side of the molding cavity (44). The workbench (11) is also provided with an adjusting member (63) for slidingly adjusting the discharge plate (61), and the adjusting member (63) moves with the movement of the lower pressure head (31).

7. The soft ferrite powder core extrusion molding machine according to claim 6, characterized in that: When the lower pressure head (31) descends to the position of the lower mold (32), the adjusting member (63) drives the lowering plate (61) to move in a direction close to the material storage box (21), and the sealing plate (6) blocks the top side of the molding cavity (44); When the lower pressure head (31) continues to descend to perform pressing in the height direction, the pressing block (42) closes and the pressing belt (43) is rolled up to perform circumferential pressing, and at this time, the sealing plate (6) always keeps sealing the top side of the molding cavity (44); When the lower pressure head (31) rises to a position separated from the lower mold (32), the material storage tray (24) rotates an angle of the material storage cavity (241), and the sealing plate (6) always keeps blocking the top side of the molding cavity (44); When the lower pressure head (31) continues to rise, the sealing plate (6) is separated from the top side of the molding cavity (44), and the adjusting member (63) drives the blanking plate (61) to slide in the direction of the molding cavity (44).

8. The soft ferrite powder core extrusion molding machine according to claim 7, characterized in that: The adjusting member (63) comprises an adjusting rack (631) slidably arranged on the workbench (11), the adjusting rack (631) being connected to the blanking plate (61), an adjusting gear (632) being rotatably connected to the workbench (11), the adjusting rack (631) being meshed with the adjusting gear (632), a second lifting rack (634) being arranged on the frame (1), the second lifting rack (634) being connected to the lower pressure head (31), and a a second lifting gear (633), the second lifting gear (633) being transmission-connected to the adjusting gear (632), the adjusting rack (631) being partially provided with tooth grooves, and when the bottom side of the lower pressing head (31) is at the same height as the top side of the lower mold (32), the adjusting rack (631) is separated from the adjusting gear (632), the first lifting rack (53) is also partially provided with tooth grooves, and 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), 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), the first lifting rack (53) is separated from the first lifting gear (54).

9. The soft ferrite powder 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 material storage tray (24), and a rotating rack (71) is provided on the frame (1). The rotating rack (71) meshes with the co-moving gear (471), and the rotating gear (7) is a one-way gear and meshes with the rotating rack (71).

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