A pressing device for magnetic materials and its preparation method

Abstract

This invention relates to the field of magnetic material pressing technology, and discloses a magnetic material pressing device and its preparation method. The pressing device includes a base, a top seat, a lower mold seat, an upper mold seat, a lower mold, an upper mold, a guide seat, a scraper, and a magnetic module. The magnetic module includes a coil seat, a coil assembly, a guide rod, a hydraulic telescopic cylinder, a support seat, and a controller. The coil assembly is detachably installed on the coil seat. After being energized, it forms a magnetic field with the magnetic guide rod to attract magnetic powder. The hydraulic telescopic cylinder drives the uniform filling of powder. The upper mold is provided with a demolding groove, a water absorption channel, and a pipe connector. The demolding groove avoids sticking and damage, and the water absorption channel uses a vacuum pump to extract pressing moisture in real time.

Description

Technical Field

[0001] This invention relates to the field of magnetic material pressing technology, and in particular to a magnetic material pressing device and its preparation method. Background Technology

[0002] Magnetic materials, as fundamental materials in fields such as electronics, new energy, and intelligent manufacturing, are used in components including transformer cores, motor rotors, sensor elements, and energy storage devices, influencing product performance, energy efficiency, and reliability.

[0003] In the current field of magnetic material pressing, existing equipment relies heavily on manual or simple mechanical pouring of magnetic material powder. This leads to uneven powder accumulation within the mold opening, resulting in inconsistent product density. Furthermore, the upper mold lacks a targeted demolding structure design, causing the pressed magnetic material powder to easily adhere to the mold's inner wall, resulting in defects such as chipped corners and cracks during demolding. Summary of the Invention

[0004] In view of the above-mentioned problems, the purpose of this invention is to provide a pressing device for magnetic materials and a method for preparing magnetic material products, aiming to solve the problems of uneven powder filling and easy demolding damage in magnetic material pressing devices.

[0005] The present invention is achieved by the following technical solution: a magnetic material pressing device, comprising a top seat and a base arranged vertically, wherein the top of the base is provided with a lower mold base with a lower mold, the bottom of the top seat is provided with an upper mold base with an upper mold, and the top of the lower mold is provided with multiple sets of product mold openings vertically through it.

[0006] The bottom of the lower mold is provided with a magnetic module, which includes a coil base, a coil assembly and a guide rod. The guide rod is vertically installed in the inner cavity of the coil assembly, and the bottom end of the guide rod passes through the coil base and is mounted with a support.

[0007] The coil assembly is detachably mounted on the top of the coil base, and the coil assembly can slide up and down in the inner cavity of the product mold opening on the lower mold. The magnetic field generated by energizing the coil assembly can uniformly attract magnetic materials into the inner cavity of the product mold opening on the lower mold.

[0008] The bottom of the coil holder and the top four corners of the support base are each equipped with a hydraulic telescopic cylinder for pushing the coil holder up and down. A controller for controlling the extension and retraction of the hydraulic telescopic cylinder is provided on one side of the support base.

[0009] As a further improvement to the above solution, the top of the guide rod is on the same horizontal plane as the top of the lower mold, and when the coil assembly rises to its highest point, its top is also on the same horizontal plane as the top of the lower mold.

[0010] As a further improvement to the above solution, the coil holder includes a combination plate and a support plate, with the support plate integrally disposed at the bottom of the combination plate. The top of the combination plate has multiple sets of guide holes arranged vertically in a circular pattern, and the guide holes penetrate the bottom of the support plate. The top of the combination plate has two sets of combination slots symmetrically disposed about the center of the guide holes. The bottom of the support plate has terminals symmetrically disposed about the center of the guide holes, and the top of the terminals is disposed in the inner cavity of the combination slots. A terminal block for energizing is disposed on one side of the support plate, and the output end of the terminal block is connected to the terminal block by a thread.

[0011] As a further improvement to the above solution, the guide hole can slide along the outer wall of the guide rod, the cross-section of the combined slot is an inverted "Ω" shape, and the bottom four corners of the support plate are provided with threaded connecting sleeves for connecting with the telescopic end of the hydraulic telescopic cylinder.

[0012] As a further improvement to the above solution, the coil assembly includes a coil box and a coil cover, and the coil cover is threaded onto the top of the coil box. Both the coil box and the coil cover have a guide opening vertically arranged in the middle that coincides with the guide hole. The inner cavity of the coil box is provided with a coil, and the bottom of the coil box is provided with a combined plug rod that communicates with the coil.

[0013] As a further improvement to the above solution, the outer wall of the combined plug is provided with a baffle that matches the combined slot, and when the combined plug is installed into the inner cavity of the combined slot, its bottom end can contact the top end of the terminal block. When energized, electrical energy can be transmitted to the coil through the combined plug. After the coil is energized, it combines with the external guide rod to form an electromagnetic coil and generate a magnetic field.

[0014] As a further improvement to the above solution, a guide seat is installed on the top of the lower mold base, and a scraper plate that can move back and forth is provided on the rear side of the top of the guide seat. The scraper plate can scrape off excess magnetic material from the top of the product mold opening on the lower mold by moving back and forth.

[0015] The guide seat includes a guide plate, and the middle of the guide plate is provided with a slot that matches the lower mold, so that the top of the lower mold can pass through the slot and be on the same horizontal plane as the top of the guide plate. Vertical plates are provided on both sides of the guide plate, which can limit the left and right swing of the scraper during the forward and backward movement. Connecting blocks with threaded holes are provided on both the front and rear sides of the coil seat. A connecting screw is vertically installed in the inner cavity of the connecting block, and a fixing pressure plate is installed at the bottom end of the connecting screw.

[0016] As a further improvement to the above solution, the side wall of the upper mold base is provided with a slot, and a fixing rod is installed in the inner cavity of the slot. The bottom of the upper mold base is provided with a mold slot for installing the upper mold, and a positioning slot is provided in the inner cavity side wall of the mold slot.

[0017] As a further improvement to the above solution, the bottom of the upper mold has multiple sets of demolding slots, and the multiple sets of demolding slots are symmetrically arranged around the central axis of the product mold opening on the lower mold. The side wall of the demolding slot is provided with a positioning block that matches the positioning slot. The side wall of the upper mold is provided with a fixing slot that matches the fixing rod. The bottom of the upper mold is evenly provided with water absorption channels, and the water absorption channels are offset from the demolding slots. The top of the upper mold is provided with a pipe connector that communicates with the water absorption channels.

[0018] As a further improvement to the above solution, a method for preparing a magnetic material product, utilizing the aforementioned magnetic material pressing equipment, includes the following specific steps:

[0019] S1. Preliminary preparation: Install the lower mold base, guide pillar, guide sleeve, upper mold base, lower mold, scraper, base, and guide seat, ensuring that the lower mold base is directly below the upper mold base and the guide seat is flush with the top of the lower mold.

[0020] S2, Install coil module: Assemble coil assembly and coil seat, install hydraulic telescopic cylinder and support seat, place coil assembly in the lower mold product mold orifice in step S1, install guide rod, connect power supply and controller;

[0021] S3, Install the water absorption module: Position and install the upper mold to the bottom of the upper mold base in step S1 and fix it, and connect the pipe connector to the vacuum pump;

[0022] S4, Magnetic material feeding: The coil assembly in step S2 is energized to generate a magnetic field, magnetic material powder is poured out, and the coil assembly is moved down by the hydraulic telescopic cylinder so that the powder enters the product mold opening of the lower mold evenly under the action of the magnetic field;

[0023] S5, Excess material removal: The scraper plate in step S1 is slid horizontally to remove excess powder, making the top of the material inside the mold opening of the lower mold product flat.

[0024] S6, Product pressing: Push the upper mold in step S3 to move down and contact the lower mold in step S1, control the coil assembly in step S4 to move up and squeeze the powder, and at the same time use the vacuum pump in step S3 to remove the moisture generated during pressing.

[0025] S7, Product Demolding: Disconnect the power supply to the coil assembly, turn off the vacuum pump, raise the upper mold, and push the molded product out of the lower mold through the coil assembly.

[0026] The beneficial effects of this invention are as follows:

[0027] This invention uses a magnetic module (coil assembly + magnetic guide rod) to form a stable magnetic field that attracts magnetic powder when energized. Combined with a hydraulic telescopic cylinder to drive the coil assembly to move downward at a uniform speed, the powder can be evenly delivered to the inner cavity of the lower mold opening, solving the problem of uneven filling in traditional methods.

[0028] The invention features a demolding groove at the bottom of the upper mold that matches the mold opening of the lower mold. At the same time, the upper mold is quickly positioned and installed using a positioning block and a fixing rod, which can effectively prevent the product from sticking to the mold during demolding.

[0029] The present invention has a built-in water absorption channel in the mold and is connected to a vacuum pump. The water generated during the pressing process can be extracted in real time by negative pressure, which effectively reduces the phenomenon of air bubbles and stratification inside the product. Attached Figure Description

[0030] Figure 1 This is a three-dimensional perspective view of the pressing equipment for the magnetic material of the present invention;

[0031] Figure 2 A three-dimensional view of the lower mold base with a magnetic module in the magnetic material pressing device of the present invention;

[0032] Figure 3 The magnetic module is part of the magnetic material pressing device of the present invention. Figure 2 A sectional view of the lower mold base along line AA;

[0033] Figure 4 This is a three-dimensional representation of the magnetic module of the magnetic material pressing device of the present invention;

[0034] Figure 5 This is a three-dimensional view of the coil holder of the magnetic material pressing device of the present invention from a top view.

[0035] Figure 6 This is a three-dimensional perspective view of the coil holder of the magnetic material pressing device of the present invention, viewed from below.

[0036] Figure 7 This is a three-dimensional perspective view of the coil assembly of the magnetic material pressing device of the present invention;

[0037] Figure 8 This is a top-view three-dimensional view of the integrated lower mold base and guide base of the magnetic material pressing device of the present invention.

[0038] Figure 9 This is a three-dimensional view of the lower mold base and guide seat assembly of the magnetic material pressing device of the present invention, viewed from below.

[0039] Figure 10This is a top-view three-dimensional perspective view of the top seat and upper mold seat assembly of the magnetic material pressing device of the present invention.

[0040] Figure 11 A three-dimensional view from a bottom angle showing the integrated combination of the top seat and upper mold seat of the magnetic material pressing device of the present invention.

[0041] Figure 12 This is a three-dimensional perspective view of the upper mold of the magnetic material pressing device of the present invention, viewed from below.

[0042] Figure 13 This is a three-dimensional view of the upper mold of the magnetic material pressing device of the present invention from a top view and a cross-sectional view along the BB direction;

[0043] Figure 14 This is a flowchart illustrating the preparation method of the magnetic material product of the present invention.

[0044] Figure 15 This is a three-dimensional representation of a magnetic product pressed and molded according to the preparation method of magnetic material products of the present invention.

[0045] Explanation of key symbols:

[0046] 1. Base; 2. Lower mold base; 21. Stepped groove; 22. Support cylinder; 23. Guide post; 24. Threaded hole; 25. Mounting groove; 3. Top seat; 31. Support frame; 32. Guide sleeve; 33. Mounting hole; 34. Connecting rod; 4. Upper mold base; 41. Fixed insert rod; 42. Mold groove; 43. Positioning groove; 5. Lower mold; 6. Upper mold; 61. Demolding groove; 62. Positioning block; 63. Fixed slot; 64. Water suction channel; 65. Pipe connector; 7. Guide seat; 71. Guide plate; 72. 73. Connecting block; 74. Connecting screw; 8. Fixing plate; 9. Scraper; 10. Magnetic module; 11. Coil holder; 12. Combination plate; 13. Support plate; 14. Guide hole; 15. Combination slot; 16. Terminal post; 17. Terminal block; 18. Connecting sleeve; 19. Coil assembly; 10. Coil box; 11. Coil cover; 12. Guide port; 13. Coil; 14. Combination plug; 15. Guide rod; 16. Hydraulic telescopic cylinder; 17. Support base; 18. Controller. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0048] Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0049] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0050] To keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted.

[0051] Please combine Figure 1-13 As shown in the figure, an embodiment of the present invention provides a magnetic material pressing device, including: a base 1 and a top seat 3, with the top seat 3 positioned directly above the base 1. A lower mold base 2 with a lower mold 5 is provided on the top of the base 1. Multiple sets of product die openings penetrating the bottom of the lower mold 5 are vertically opened on the top of the lower mold 5, and these product die openings are symmetrically arranged about the axis of the lower mold 5. The product die openings on the lower mold 5 can be used for forming magnetic material products during pressing. An upper mold base 4 that cooperates with the lower mold base 2 is provided at the bottom of the top seat 3. An upper mold 6 that matches the lower mold 5 is installed at the bottom of the upper mold base 4. The top seat 3 is connected to an existing hydraulic press, and the hydraulic press drives the top seat 3 to move up and down, thereby driving the upper mold 6 to move up and down. The downward movement of the upper mold 6 moves the lower mold... The top of die 5 is used for pressing the top of the magnetic material product and absorbing moisture generated during the pressing process. A guide seat 7 is provided on the top of the lower die 2, and a scraper 8, which can move back and forth driven by a hydraulic press, is provided on the top of the guide seat 7. The guide seat 7 restricts the left and right swaying of the scraper 8 during its back-and-forth movement, preventing deviation. The hydraulic press-driven back-and-forth movement of the scraper 8 removes excess magnetic material from the top of the product's die opening on the lower die 5, ensuring the flatness of the magnetic material product's top before pressing. Since the magnetic material powder needs to be kept uniform when placed into the inner cavity of the lower die 5 to ensure the quality of the magnetic material product, to ensure that the magnetic material is evenly placed into the inner cavity of the lower die 5, such as... Figure 1-3As shown, a magnetic module 9 is provided at the bottom of the lower mold 5. The magnetic module 9 includes a coil base 91, a coil assembly 92, and a guide rod 93. The guide rod 93 is vertically installed in the inner cavity of the coil assembly 92 (the guide rod 93 is made of 45# steel magnetic material to ensure a stable magnetic field is formed after being energized with the coil assembly 92). The coil assembly 92 with the guide rod 93 is installed in the inner cavity of the product mold opening on the lower mold 5. The coil assembly 92 can slide up and down in the inner cavity of the product mold opening on the lower mold 5. The top of the guide rod 93 is on the same horizontal plane as the top of the lower mold 5. When the coil assembly 92 rises to its highest point, its top is also on the same horizontal plane as the top of the lower mold 5. At the same time, the coil assembly 92 can generate a magnetic field by combining with the guide rod 93 when energized. The generated magnetic field can attract magnetic materials, thereby causing the coil assembly 92 to move downwards when energized. Magnetic material is uniformly placed in the inner cavity of the product mold opening on the lower mold 5. The coil seat 91 is set at the bottom of multiple coil assemblies 92. The bottom end of the guide rod 93 passes through the coil seat 91. The coil assembly 92 is detachably installed on the top of the coil seat 91, which is convenient for disassembly and replacement when the coil assembly 92 is damaged. Hydraulic telescopic cylinders 94 for pushing the coil seat 91 up and down are installed at the four corners of the bottom of the coil seat 91. A support seat 95 is installed at the bottom of the hydraulic telescopic cylinder 94. The bottom end of the guide rod 93 is fixed to the top of the support seat 95 by threads. A controller 96 for controlling the extension or retraction of the extension end of the hydraulic telescopic cylinder 94 is set on one side of the support seat 95. The controller 96 is connected to the control end of the existing hydraulic press through the TCP / IP protocol. It can send commands to the controller 96 through the control end of the hydraulic press to control the extension or retraction of the extension end of the hydraulic telescopic cylinder 94.

[0052] To further illustrate the structure of the coil holder 91 and the coil assembly 92, as well as the detachable design between the coil assembly 92 and the coil holder 91, as follows: Figure 4-7As shown, the coil holder 91 includes a combination plate 911 and a support plate 912, and the combination plate 911 and the support plate 912 are designed as an integral structure. Multiple sets of guide holes 913 matching the guide rod 93 are vertically opened on the top of the combination plate 911, and the multiple sets of guide holes 913 are arranged circumferentially. The guide holes 913 penetrate the bottom of the support plate 912, allowing the top end of the guide rod 93 to pass through the inner cavity of the guide hole 913 and be flush with the top of the lower mold 5. Simultaneously, the guide holes 913 allow the coil holder 91 to slide along the outer wall of the guide rod 93, preventing offset caused by the up-and-down sliding of the coil holder 91. Symmetrical openings about the axis of the guide holes 913 are provided on the top of the combination plate 911. The combination slot 914 is used for combination with coil assembly 92, and the cross section of the combination slot 914 is an inverted "Ω" shape. The bottom of the support plate 912 is symmetrically provided with terminals 915 about the axis of guide hole 913, and the top of the terminals 915 is located in the inner cavity of the combination slot 914. A terminal board 916 for connecting to an external power supply is provided on one side of the bottom of the support plate 912, and the output end of the terminal board 916 is connected to the bottom end of the terminal 915 by a wire. Threaded connecting sleeves 917 are provided at the four corners of the bottom of the support plate 912 to facilitate the installation and disassembly of the support plate 912 and the telescopic end of the hydraulic telescopic cylinder 94.

[0053] The coil assembly 92 includes a coil housing 921 and a coil cover 922, which are connected as a whole by internal and external threads. A guide opening 923 matching the guide rod 93 is vertically provided in the middle of the coil housing 921 and the coil cover 922, and the axis of the guide opening 923 coincides with that of the guide hole 913, allowing the coil housing 921 and the coil cover 922 to slide up and down along the outer wall of the guide rod 93. A coil 924 that generates a magnetic field when energized is provided inside the coil housing 921. Two sets of combination inserts 925 for mounting into the combination slot 914 are installed at the bottom of the coil housing 921, and the top of the combination inserts 925 is connected to the terminal of the coil 924. A retaining plate for snapping is provided on the outside of the combined insert rod 925, and the retaining plate matches the inner cavity of the combined slot 914. When the combined insert rod 925 is installed into the inner cavity of the combined slot 914, its bottom end can contact the top end of the terminal 915. When the terminal 915 is energized, electrical energy can be transmitted to the coil 924 through the combined insert rod 925. After the coil 924 is energized, it combines with the external guide rod 93 to form an electromagnetic coil and generate a magnetic field. The generated magnetic field can attract magnetic material powder. The attracted magnetic material powder is evenly entered into the inner cavity of the product mold opening on the lower mold 5 under the downward movement of the coil assembly 92, so as to avoid affecting the quality of the magnetic material product pressing and molding due to uneven filling of magnetic powder.

[0054] To further illustrate the structure of mold base 2 and guide seat 7, as follows: Figure 1-9As shown, the top of the lower mold base 2 is provided with a stepped groove 21 for installing the lower mold 5, and the bottom of the stepped groove 21 is provided with a through groove for installing the assembly plate 911. Support cylinders 22 are welded at the four corners of the lower mold base 2. Guide pillars 23 for guiding the upper seat 3 to slide up and down are vertically installed in the inner cavity of the support cylinders 22. Threaded holes 24 with threads are provided at the four corners of the bottom of the lower mold base 2. Mounting grooves 25 are symmetrically provided on the front and rear sides of the bottom of the lower mold base 2. The guide seat 7 includes a guide plate 71, and the middle of the guide plate 71 is provided with a groove that matches the stepped groove 21, so that the top of the lower mold 5 can pass through the groove and its top. On the same horizontal plane, vertical plates are set on both sides. The vertical plates on both sides are used to limit the left and right swing of the scraper plate 8 during the forward and backward movement. Connecting blocks 72 with threaded holes at the bottom are welded on both the front and rear sides of the guide plate 71. A connecting screw 73 is vertically installed inside the threaded hole at the bottom of the connecting block 72. The top of the connecting screw 73 is connected to the threaded hole at the bottom of the connecting block 72 by a thread. A fixing plate 74 is installed at the bottom of the connecting screw 73. The fixing plate 74 is pressed into the inner cavity of the mounting groove 25 by a nut that is threaded to the bottom of the connecting screw 73, which facilitates the installation and disassembly of the guide seat 7 and the lower mold seat 2.

[0055] To further illustrate the structure of the top seat 3 and the upper mold base 4, as follows: Figure 1-11 As shown, the top seat 3 includes a support frame 31. Guide sleeves 32 for sliding guidance are welded at the four corners of the support frame 31. The guide sleeves 32 can slide up and down along the outer wall of the guide post 23. Threaded mounting holes 33 are provided at the top and bottom four corners of the support frame 31. A connecting rod 34 is threadedly installed in the inner cavity of the mounting hole 33 at the bottom of the support frame 31. The same connecting holes as the mounting holes 33 are provided at the top four corners of the upper mold seat 4. The bottom end of the connecting rod 34 is threadedly connected to the top connecting hole of the upper mold seat 4. A slot is provided on the side wall of the upper mold seat 4. A fixing rod 41 is detachably installed in the inner cavity of the slot. A mold slot 42 for installing the upper mold 6 is provided at the bottom of the upper mold seat 4. A positioning slot 43 for installing and positioning the upper mold 6 is provided on the inner side wall of the mold slot 42.

[0056] To further illustrate the structure of the upper mold 6, as follows: Figure 1-13As shown, the bottom of the upper mold 6 is evenly provided with demolding slots 61 that match the product mold opening of the lower mold 5. The demolding slots 61 are symmetrically arranged about the axis center of the product mold opening of the lower mold 5. The demolding slots 61 facilitate the demolding of the top of the formed magnetic material product and avoid the phenomenon of missing corners of the magnetic material product due to adhesion during the demolding process. The side wall of the upper mold 6 is vertically provided with positioning blocks 62 that match the positioning slots 43. The side wall of the upper mold 6 is provided with fixing slots 63 that match the fixing rods 41. By inserting the positioning blocks 62 into the inner cavity of the positioning slots 43, the upper mold 6 can be positioned and installed in the inner cavity of the mold slots 42. In this process, the end of the fixing rod 41 can be inserted into the inner cavity of the fixing slot 63, fixing the upper mold 6 to the bottom of the upper mold base 4, which facilitates the positioning, installation and disassembly of the upper mold 6. Water absorption channels 64 are evenly opened at the bottom of the upper mold 6, and the water absorption channels 64 are offset from the demolding slot 61. A pipe connector 65 is vertically installed on the top of the upper mold 6, and the water absorption channels 64 are connected to the pipe connector 65. The pipe connector 65 is connected to an external vacuum pump using a vacuum hose. The vacuum pump can extract the moisture generated during the pressing of the magnetic material through the water absorption channels 64 connected to the pipe connector 65, effectively reducing the internal bubbles and delamination of the product.

[0057] According to the aforementioned magnetic material pressing equipment, such as Figure 1-15 As shown, this solution also provides a method for preparing magnetic material products, the specific steps of which are as follows:

[0058] S1, Preliminary preparation: Vertically install the guide column 23 in the inner cavity of the four corner support cylinders 22 of the lower mold base 2, and fit the guide sleeve 32 on the outer wall of the guide column 23 so that the guide sleeve 32 can slide up and down along the outer wall of the guide column 23. Fix the upper mold base 4 to the upper telescopic end of the hydraulic press through the mounting hole 33 at the top of the top seat 3. Connect the rear side of the scraper 8 to the horizontal telescopic end of the hydraulic press with bolts. Fix the base 1 to the bottom of the hydraulic press and make the lower mold base 2 with the lower mold 5 directly below the upper mold base 4. Install the guide seat 7 on the top of the lower mold base 2 and make its top and the top of the lower mold 5 on the same horizontal plane.

[0059] S2, Install the coil module: Install the bottom combination plug 925 of the coil assembly 92 into the inner cavity of the combination slot 914 on the coil seat 91, and rotate it 90° to contact the bottom end of the combination plug 925 with the top end of the terminal block 915. Install the telescopic end of the hydraulic telescopic cylinder 94 into the inner cavity of the connecting sleeve 917, and fix the bottom of the hydraulic telescopic cylinder 94 to the top of the support base 95 with bolts. Install the support base 95 with the coil seat 91, coil assembly 92, and hydraulic telescopic cylinder 94 onto the top of the base 1 in step S1. The coil assembly 92 is installed into the inner cavity of the product mold in the lower mold 5, and the top of the coil assembly 92 is able to be on the same horizontal plane as the top of the lower mold 5 under the push of the hydraulic telescopic cylinder 94. The guide rod 93 is vertically installed in the inner cavity of the coil assembly 92, and the bottom end of the guide rod 93 passes through the coil seat 91 and is connected to the top of the support seat 95 by a thread. The terminal block 916 is connected to the external power supply through the terminal block and switch, the power supply of the controller 96 is turned on, and it is connected to the control end of the hydraulic press through the TCP / IP protocol.

[0060] S3, Install the water absorption module: Position and install the upper mold 6 at the bottom of the upper mold base 4 in step S1 with the cooperation of the positioning block 62 and the positioning slot 43, and fix the upper mold 6 in the inner cavity of the mold slot 42 by inserting the end of the fixing rod 41 into the inner cavity of the fixing slot 63. Then connect the top of the pipe connector 65 to the vacuum pump through the vacuum hose.

[0061] S4, Magnetic material feeding: The external power supply controlled by the switch in step S2 is used to energize the coil 924 in the coil assembly 92. After being energized, the coil 924 and the guide rod 93 form an electromagnetic coil to generate a magnetic field, which pours the magnetic material powder onto the top of the lower mold 5. At the same time, the control end of the hydraulic press sends a command to the controller 96 to shorten the extension end of the hydraulic telescopic cylinder 94. The shortening of the extension end of the hydraulic telescopic cylinder 94 drives the coil assembly 92 to slide down along the inner wall of the product mold opening on the lower mold 5 and the outer wall of the guide rod 93. During the sliding process, the magnetic field can drive the magnetic material powder to enter the inner cavity of the product mold opening on the lower mold 5 evenly.

[0062] S5, Excess material scraping: The scraper 8 is pushed horizontally by the horizontal extension end of the hydraulic press in step S1 and slides horizontally under the restriction of the vertical plates on both sides of the guide seat 7. The sliding scraper 8 can scrape off the excess magnetic material powder in step S4 and make the top of the magnetic material on the product mold opening of the lower mold 5 in a flat state.

[0063] S6, Product pressing: The upper mold 6 in step S3 is pushed downward by the upper telescopic end of the hydraulic press in step S1, the vacuum pump is turned on, and the bottom of the upper mold 6 is brought into contact with the top of the lower mold 5. The hydraulic press sends a command to the controller 96 to extend the telescopic end of the hydraulic telescopic cylinder 94. The extension of the telescopic end of the hydraulic telescopic cylinder 94 drives the coil assembly 92 to press the magnetic powder inside the product mold opening of the lower mold 5 upward. The moisture generated during the pressing process can be extracted in time through the water suction channel 64 by the negative pressure generated by the vacuum pump.

[0064] S7, Product Demolding: After pressing in step S6 is completed, disconnect the power supply to coil 924, turn off the vacuum pump, and lift the upper mold 6 through the upper telescopic end of the hydraulic press. Then, lift the coil assembly 92 to its top level with the top of the lower mold 5 through the hydraulic telescopic cylinder 94. The formed magnetic product (such as...) Figure 15 As shown in the diagram (which is a structural diagram of a pressed magnetic product), it can be pushed out of the upper product mold opening of the lower mold 5 by the coil assembly 92.

[0065] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A pressing device for magnetic materials, characterized in that: It includes a top seat (3) and a base (1) arranged vertically. The top of the base (1) is provided with a lower mold base (2) with a lower mold (5). The bottom of the top seat (3) is provided with an upper mold base (4) with an upper mold (6). The top of the lower mold (5) is provided with multiple sets of product mold openings vertically through it. The bottom of the lower mold (5) is provided with a magnetic module (9), wherein the magnetic module (9) includes a coil seat (91), a coil assembly (92) and a guide rod (93). The guide rod (93) is vertically installed in the inner cavity of the coil assembly (92), and the bottom end of the guide rod (93) passes through the coil seat (91) and is installed with a support seat (95). The coil assembly (92) is detachably mounted on the top of the coil base (91), and the coil assembly (92) can slide up and down in the inner cavity of the product mold on the lower mold (5), and the magnetic field generated by energizing the coil assembly (92) can uniformly attract magnetic materials into the inner cavity of the product mold on the lower mold (5). The bottom of the coil base (91) and the top four corners of the support base (95) are equipped with hydraulic telescopic cylinders (94) for pushing the coil base (91) up and down. A controller (96) for controlling the extension and retraction of the hydraulic telescopic cylinders (94) is provided on one side of the support base (95).

2. The pressing equipment for magnetic materials as described in claim 1, characterized in that, The top of the guide rod (93) is on the same horizontal plane as the top of the lower mold (5), and when the coil assembly (92) rises to its highest point, its top is also on the same horizontal plane as the top of the lower mold (5).

3. The pressing equipment for magnetic materials as described in claim 1, characterized in that, The coil holder (91) includes a combination plate (911) and a support plate (912), and the support plate (912) is integrally disposed at the bottom of the combination plate (911). The top of the combination plate (911) has multiple sets of guide holes (913) arranged vertically in a circular pattern, and the guide holes (913) penetrate the bottom of the support plate (912). The top of the combination plate (911) has two sets of combination slots (914) symmetrically disposed about the axis center of the guide holes (913). The bottom of the support plate (912) has terminals (915) symmetrically disposed about the axis center of the guide holes (913), and the top of the terminals (915) is disposed in the inner cavity of the combination slots (914). A terminal board (916) for energizing is disposed on one side of the support plate (912), and the output end of the terminal board (916) is connected to the terminal (915) by a thread.

4. The pressing equipment for magnetic materials as described in claim 3, characterized in that, The guide hole (913) can slide along the outer wall of the guide rod (93), the cross section of the combined slot (914) is an inverted "Ω" shape, and the bottom four corners of the support plate (912) are provided with threaded connecting sleeves (917) for connecting with the telescopic end of the hydraulic telescopic cylinder (94).

5. The pressing equipment for magnetic materials as described in claim 4, characterized in that, The coil assembly (92) includes a coil housing (921) and a coil cover (922), and the coil cover (922) is threaded onto the top of the coil housing (921). Both the coil housing (921) and the coil cover (922) have a guide opening (923) vertically arranged in the middle that coincides with the guide hole (913). The inner cavity of the coil housing (921) is provided with a coil (924), and the bottom of the coil housing (921) is provided with a combination plug (925) that communicates with the coil (924).

6. The pressing equipment for magnetic materials as described in claim 5, characterized in that, The outer wall of the combined plug (925) is provided with a baffle that matches the combined slot (914). When the combined plug (925) is installed into the inner cavity of the combined slot (914), its bottom end can contact the top end of the terminal (915). When energized, it can transmit electrical energy to the coil (924) through the combined plug (925). After the coil (924) is energized, it combines with the external guide rod (93) to form an electromagnetic coil and generate a magnetic field.

7. The pressing equipment for magnetic materials as described in claim 1, characterized in that, The top of the lower mold base (2) is equipped with a guide seat (7), and a scraper (8) that can move back and forth is provided on the rear side of the top of the guide seat (7). The scraper (8) can scrape off the excess magnetic material on the top of the product mold opening of the lower mold (5) by moving back and forth. The guide seat (7) includes a guide plate (71), and the middle part of the guide plate (71) is provided with a slot that matches the lower mold (5), so that the top of the lower mold (5) can pass through the slot and be on the same horizontal plane as the top of the guide plate (71). Vertical plates are provided on both sides of the guide plate (71), and the vertical plates on both sides can restrict the left and right swing of the scraper plate (8) during the forward and backward movement. Connecting blocks (72) with threaded holes are provided on both the front and rear sides of the coil seat (91). A connecting screw (73) is vertically installed in the inner cavity of the connecting block (72), and a fixing pressure plate (74) is installed at the bottom end of the connecting screw (73).

8. The pressing equipment for magnetic materials as described in claim 1, characterized in that, The upper mold base (4) has a slot on its side wall, and a fixing rod (41) is installed in the inner cavity of the slot. The bottom of the upper mold base (4) has a mold slot (42) for installing the upper mold (6), and a positioning slot (43) is provided on the inner cavity side wall of the mold slot (42).

9. The pressing equipment for magnetic materials as described in claim 8, characterized in that, The bottom of the upper mold (6) has multiple sets of demolding slots (61), and the multiple sets of demolding slots (61) are symmetrically arranged at the center of the product mold opening of the mold (5) below the mold. The side wall of the demolding slot (61) is provided with a positioning block (62) that matches the positioning slot (43). The side wall of the upper mold (6) is provided with a fixing slot (63) that matches the fixing rod (41). The bottom of the upper mold (6) is evenly provided with water absorption channels (64), and the water absorption channels (64) are misaligned with the demolding slots (61). The top of the upper mold (6) is provided with a pipe connector (65) that communicates with the water absorption channels (64).

10. A method for preparing a magnetic material product, characterized in that, The specific steps using the pressing device for the magnetic material according to any one of claims 1-9 are as follows: S1, Preliminary preparation: Install the lower mold base (2), guide column (23), guide sleeve (32), upper mold base (4), lower mold (5), scraper (8), base (1), and guide seat (7), ensuring that the lower mold base (2) is located directly below the upper mold base (4) and the guide seat (7) is flush with the top of the lower mold (5); S2, Install coil module: Assemble coil assembly (92) and coil base (91), install hydraulic telescopic cylinder (94) and support base (95), place coil assembly (92) in the product mold opening of lower mold (5) in step S1, install guide rod (93), and connect power supply and controller; S3, Install the water absorption module: Position and install the upper mold (6) at the bottom of the upper mold base (4) in step S1 and fix it, and connect the pipe connector (65) to the vacuum pump; S4, Magnetic material feeding: Power the coil assembly (92) in step S2 to generate a magnetic field, pour the magnetic material powder, and drive the coil assembly (92) to move down through the hydraulic telescopic cylinder (94) so ​​that the powder enters the lower mold (5) product mold opening evenly under the action of the magnetic field; S5, Excess material removal: The scraper (8) in step S1 is slid horizontally to remove excess powder, so that the top of the material inside the product mold opening of the lower mold (5) is flat. S6, Product pressing: Push the upper mold (6) in step S3 to move down and contact the lower mold (5) in step S1, control the coil assembly (92) in step S4 to move up and squeeze the powder, and at the same time use the vacuum pump in step S3 to remove the moisture generated during pressing; S7, Product demolding: Disconnect the power supply of the coil assembly (92), turn off the vacuum pump, raise the upper mold (6), and push the molded product out of the product mold opening of the lower mold (5) through the coil assembly (92).

Images