Automatic die-casting device for metal powder core

Abstract

The invention discloses an automatic metal powder core die-casting device, which relates to the technical field of die-casting devices, and comprises a base, an L-shaped bracket, a carrying table, a lower die arranged below the carrying table in a lifting manner, and a protection mechanism, through the arrangement of the protection mechanism, during die casting, the action two-way bearing component moves to the position under the lower die and abuts against the lower die, the connection and disconnection component is synchronously triggered, and connection between the lower die and the telescopic end of the lower hydraulic cylinder is rapidly disconnected; at the moment, the force generated by extruding the raw materials by the upper die is transmitted to the base through the lower die and the two-way bearing component to be borne dispersedly, so that the lower hydraulic cylinder is not stressed in the die-casting process and is prevented from bearing huge extrusion force for a long time, abrasion of a transmission assembly is effectively reduced, and the fault occurrence frequency is reduced; after die casting is completed, the two-way bearing component is reset, the lower die and the lower hydraulic cylinder are connected again through the connection and disconnection component, then follow-up processes such as demolding and material taking are not affected, and efficient and stable operation of overall automatic die casting of the device is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of die-casting equipment technology, specifically to an automated die-casting equipment for metal powder cores. Background Technology

[0002] In the field of metal processing, die casting technology is widely used in the molding and production of various metal products. For the manufacturing of products such as metal powder cores, efficient and stable die casting equipment is particularly crucial. Die casting of metal powder cores is a process in which metal powder is loaded into a mold and directly solidified by mechanical or hydraulic pressure.

[0003] The existing "a die-casting device for neodymium iron boron permanent magnet blanks" with announcement number CN216729557U describes a process in which a lower hydraulic cylinder drives a lower mold to seal the bottom opening of the middle mold hole, and an upper mold descends to apply pressure to achieve die casting of the raw material.

[0004] However, the device has obvious defects: the force generated when the upper mold extrudes the raw material is transmitted to the lower hydraulic cylinder through the lower mold. The lower hydraulic cylinder bears this continuous and large pressure for a long time. Its transmission components (such as piston rod, seals, etc.) are severely worn due to repeated force and friction, resulting in frequent failures of the lower hydraulic cylinder. This not only increases the equipment maintenance cost and downtime, but also affects the product production efficiency and quality stability, thus hindering the efficient advancement of metal die casting production. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the present invention provides an automated die casting device for metal powder cores, the device includes a base, an L-shaped bracket erected on the base, a platform erected horizontally on the inner side wall of the L-shaped bracket, a middle mold placed on the platform, a lower mold raised and lowered below the platform, a lower hydraulic cylinder provided between the lower mold and the base, and a protection mechanism for improving the service life of the lower hydraulic cylinder.

[0007] The protection mechanism consists of a bidirectional load-bearing component and a disconnection component;

[0008] The bidirectional load-bearing component consists of a top support assembly and a drive assembly. The top support assembly is in two sets and symmetrically distributed on both sides of the lower hydraulic cylinder. The base has a drive cavity inside, and the drive assembly is located inside the drive cavity.

[0009] There is a certain gap between the telescopic end of the lower hydraulic cylinder and the lower mold. The connecting component consists of two sets, which are located between the two sets of top support components and the lower hydraulic cylinder, respectively.

[0010] Preferably, the top support assembly is T-shaped and consists of a support frame and a horizontal plate fixed to the top of the support frame.

[0011] Preferably, the drive assembly includes a bidirectional lead screw that rotates laterally between the inner walls of both sides of the drive cavity and two symmetrically threaded slides connected to the body of the bidirectional lead screw. The two slides correspond one-to-one with the two support frames, and the top surface of the base is provided with a movable groove for the support frame to pass through and slide. The bottom end of the support frame passes through the movable groove and is fixed perpendicularly to the slide.

[0012] Preferably, the connecting component includes an L-shaped insert that slides on the bottom surface of the lower mold, a threaded transmission assembly that cooperates with the support frame to provide movement force for the insert, a connecting notch being provided at the telescopic end of the lower hydraulic cylinder, one end of the insert slidingly contacting the bottom surface of the lower mold, and the other end of the insert being aligned and inserted into the connecting notch.

[0013] Preferably, the threaded transmission assembly includes an internal and external threaded tube with threads passing through the inner wall of the insert, and a connecting ring rotatably connected to one end of the internal and external threaded tube. The end of the internal and external threaded tube is detachably connected to a mounting bracket, which is detachably mounted to the bottom surface of the lower mold by screws.

[0014] Preferably, a spline shaft is inserted through the other end of the internal and external threaded tube, and a support sleeve that is fixedly connected to the bottom surface of the lower mold is slidably provided on the shaft of the spline shaft. One end of the spline shaft corresponds to the support frame and is fixed with a pressure-bearing arc plate, and the other end of the spline shaft is fixed with a threaded head that is threadedly connected to the inner side of the internal and external threaded tube.

[0015] Preferably, a return spring is also provided inside the internal and external threaded tube, and the return spring is located between the threaded head and the mounting bracket.

[0016] Preferably, a stud is vertically fixed to one end of the connecting swivel opposite to the internal and external threaded tubes, and the end of the stud passes through the mounting bracket and is threadedly connected to a nut.

[0017] Preferably, a drive motor is mounted on the outer side of the base, and the output shaft of the drive motor rotates through the drive cavity and is fixedly connected to one end of the bidirectional lead screw.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] 1. Through the setting of the protection mechanism, during die casting, the bidirectional bearing component moves to the bottom of the lower mold and abuts against it, simultaneously triggering the disconnection component to quickly disconnect the connection between the lower mold and the telescopic end of the lower hydraulic cylinder; at this time, the force generated by the upper mold extruding the raw material is transmitted to the base through the lower mold and the bidirectional bearing component to distribute the load, so that the lower hydraulic cylinder is not under stress during the die casting process, avoiding it from bearing huge extrusion pressure for a long time, effectively reducing the wear of its transmission components and reducing the frequency of failure;

[0020] 2. After die casting is completed, the lower mold and the lower hydraulic cylinder are reconnected at the connecting parts to ensure that the lower hydraulic cylinder 7 can drive the lower mold 6 to complete the lifting action normally. This structure precisely controls the connection state through mechanical linkage, which not only protects the lower hydraulic cylinder 7 during die casting, but also does not affect its normal driving function, further improving the reliability of the device operation. This does not affect subsequent demolding, material handling and other processes, and ensures the efficient and stable operation of the overall automated die casting device. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention with the collection box removed;

[0024] Figure 3 This is a schematic diagram of the internal structure of the base of the present invention;

[0025] Figure 4 This is a schematic diagram of the bottom structure of the lower mold of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the internally and externally threaded tube of the present invention;

[0027] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point A in the middle.

[0028] In the diagram: 1. Base; 2. L-shaped bracket; 3. Platform; 4. Middle mold; 5. Upper mold; 6. Lower mold; 7. Lower hydraulic cylinder; 8. Collection box; 9. Support frame; 10. Slide block; 11. Double-acting lead screw; 12. Drive motor; 13. Insert bracket; 14. Internal and external threaded tube; 15. Mounting bracket; 16. Threaded head; 17. Splined shaft; 18. Supporting sleeve; 19. Pressure-bearing arc plate; 20. Return spring; 21. Connecting swivel; 22. Stud; 23. Nut; 24. Upper hydraulic cylinder; 25. Movable groove; 26. Nut; 27. Connecting notch; 28. Drive cavity; 29. ​​Insert strip; 20. Slot; 30. Through groove; 31. Horizontal plate. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figures 1 to 2 As shown in the embodiment of the present invention, an automated die-casting device for metal powder cores includes a base 1, an L-shaped bracket 2 vertically mounted on the base 1, and a platform 3 horizontally mounted on the inner wall of the L-shaped bracket 2 via the bracket. A middle mold 4 is placed on the platform 3, and a plurality of mold holes are provided through the middle mold 4. An upper mold 5 is raised and lowered above the middle mold 4. An upper hydraulic cylinder 23 is installed between the upper mold 5 and the inner wall of the top of the L-shaped bracket 2. A lower mold 6 is raised and lowered below the platform 3. A lower hydraulic cylinder 7 is provided between the lower mold 6 and the base 1. A through groove 30 corresponding to the middle mold 4 is opened on the platform 3, and the lower hydraulic cylinder 7 can be retracted into the through groove 30.

[0031] A collection box 8 is provided on the front side of the platform 3. An insert 28 is fixed to the open end of the collection box 8. A slot 29 that matches the insert is provided at the front end of the platform 3. The collection box 8 is installed by the insertion 28 and the slot 29 and is used to receive the molded castings that are pushed out of the upper mold 5 and fall out of the mold hole.

[0032] In use, first, the lower hydraulic cylinder 7 is activated to extend it, causing the lower mold 6 to extend into the bottom opening of the middle mold 4, blocking the bottom openings of each mold hole in the middle mold 4. Then, the raw material of the metal powder core is added into the top openings of each mold hole in the middle mold 4. Then, the upper hydraulic cylinder is activated to extend it, causing the upper mold 5 to descend and extend into the top openings of each mold hole in the middle mold 4, pressurizing the raw material in the middle mold 4 to form a die-cast shape. Then, the lower hydraulic cylinder 7 is activated to shorten it, causing the lower mold 6 to descend. Because the raw material is subjected to greater pressure during the die-casting process, the cast sheet will have pressure with the inner wall of the mold hole in the middle mold 4, so the cast sheet will not fall out from the bottom opening of the mold hole in the middle mold 4.

[0033] Then, push the collection box 8 so that the insert 28 is smoothly inserted into the slot 29. Move the collection box 8 directly below the middle mold 4. Then, start the upper hydraulic cylinder to continue to extend, driving the upper mold 5 to continue to descend, pushing the formed casting sheet out from the mold hole of the middle mold 4. The casting sheet falls on the collection box 8. Then, start the upper hydraulic cylinder to shorten the output rod to the initial state and pull out the collection box 8. The casting sheet on the collection box 8 can then be further processed such as sintering.

[0034] However, the force generated when the upper mold 5 extrudes the raw material is transmitted from the lower mold 6 to the lower hydraulic cylinder 7. The lower hydraulic cylinder 7 bears this continuous and large pressure for a long time. Its transmission components, such as piston rod and seals, are severely worn due to repeated force and friction, which leads to frequent failures of the lower hydraulic cylinder 7. This not only increases equipment maintenance costs and downtime, but also affects product production efficiency and quality stability, thus hindering the efficient advancement of metal die casting production.

[0035] To solve the above problems, refer to Figure 2 and Figure 3 As shown, it is worth noting that a protection mechanism for extending the service life of the lower hydraulic cylinder 7 is also included.

[0036] The protection mechanism consists of bidirectional load-bearing components and connecting / disconnecting components;

[0037] With the protection mechanism in place, during die casting, the bidirectional bearing component moves to the bottom of the lower mold 6 and abuts against it, simultaneously triggering the disconnecting component to quickly disconnect the lower mold 6 from the telescopic end of the lower hydraulic cylinder 7. At this time, the force generated by the upper mold 5 squeezing the raw material is transmitted to the base 1 through the lower mold 6 and the bidirectional bearing component to distribute the load, so that the lower hydraulic cylinder 7 is not under stress during the die casting process, avoiding it from bearing huge extrusion pressure for a long time, effectively reducing the wear of its transmission components and reducing the frequency of failure. After die casting is completed, the bidirectional bearing component is reset, and the disconnecting component reconnects the lower mold 6 and the lower hydraulic cylinder 7, thus not affecting the subsequent demolding, material removal and other processes, ensuring the efficient and stable operation of the overall automated die casting device.

[0038] Specifically, refer to Figure 3 As shown, it is worth noting that the bidirectional load-bearing component consists of a top support assembly and a drive assembly. The top support assembly consists of two sets and is symmetrically distributed on both sides of the lower hydraulic cylinder 7. The base 1 has a drive cavity 27 inside, and the drive assembly is located inside the drive cavity 27.

[0039] The top support assembly is T-shaped and consists of a support frame 9 and a horizontal plate 31 fixed to the top of the support frame 9. When the lower mold 6 and the middle mold 4 are closed, the top surface of the horizontal plate 31 is set horizontally with the bottom surface of the lower mold 6.

[0040] With the support frame 9 and the horizontal plate 31, when the upper mold 5 applies pressure to the raw material in the mold hole, the top surface of the horizontal plate 31 is in horizontal contact with the bottom surface of the lower mold 6, which can serve as an auxiliary support structure to share the extrusion pressure borne by the lower mold 6; its T-shaped structure increases its contact area with the lower mold 6, evenly distributes the pressure, and avoids excessive local deformation of the lower mold 6.

[0041] Furthermore, referring to Figure 3As shown, it is worth noting that the drive assembly includes a bidirectional lead screw 11 that rotates laterally between the inner walls of both sides of the drive cavity 27 and two symmetrically threaded slides 10 connected to the body of the bidirectional lead screw 11. The two slides 10 correspond one-to-one with the two support frames 9. The top surface of the base 1 is provided with a movable groove 24 for the support frame 9 to pass through and slide. The movable groove 24 is connected to the drive cavity 27. The bottom end of the support frame 9 passes through the movable groove 24 and is fixed perpendicularly to the slides 10.

[0042] A drive motor 12 is installed on the outside of the base 1. The output shaft of the drive motor 12 rotates and passes into the drive cavity 27 and is fixedly connected to one end of the bidirectional lead screw 11.

[0043] By setting up the drive components, the drive motor 12 can drive the bidirectional lead screw 11 to rotate. Since the slide block 10 is threadedly connected to the bidirectional lead screw 11, when the bidirectional lead screw 11 rotates, the two slide blocks 10 can move synchronously in opposite directions along the lead screw, thereby driving the support frame 9 to slide precisely and adjust its position in the movable groove 24.

[0044] In addition, refer to Figure 4-6 As shown, it is worth noting that there is a certain gap between the telescopic end of the lower hydraulic cylinder 7 and the lower mold 6.

[0045] The connecting components are in two sets, located between the two sets of top support assemblies and the lower hydraulic cylinder 7, respectively;

[0046] The connecting component includes an L-shaped insert 13 that slides on the bottom surface of the lower mold 6, a threaded transmission assembly that cooperates with the support frame 9 to provide the insert 13 with a moving force, and a connecting notch 26 on the telescopic end of the lower hydraulic cylinder 7. One end of the insert 13 slides in contact with the bottom surface of the lower mold 6, and the other end of the insert 13 is aligned and inserted into the connecting notch 26.

[0047] By using the insert 13 and the threaded transmission assembly, the linkage connection and disconnection control between the lower mold 6 and the lower hydraulic cylinder 7 can be realized: when the slide 10 of the top support assembly moves the support frame 9 to the middle to the support position, the threaded transmission assembly is triggered by the movement of the support frame 9, driving the L-shaped insert 13 to slide along the bottom surface of the lower mold 6, so that one end of it inserted into the connection notch 26 is withdrawn. The gap between the telescopic end of the lower hydraulic cylinder 7 and the lower mold 6 is used to separate the two. At this time, the die-casting pressure is completely borne by the top support assembly, avoiding the lower hydraulic cylinder 7 from being stressed; when the top support assembly is reset, the threaded transmission assembly moves in the opposite direction, pushing the insert 13 to re-insert into the connection notch 26, so that the lower mold 6 and the lower hydraulic cylinder 7 are reconnected, ensuring that the lower hydraulic cylinder 7 can normally drive the lower mold 6 to complete the lifting action. This structure precisely controls the connection and disconnection state through mechanical linkage, which not only protects the lower hydraulic cylinder 7 during die casting, but also does not affect its normal driving function, further improving the reliability of the device operation.

[0048] Furthermore, referring to Figure 5 and Figure 6 As shown, it is worth noting that the threaded drive assembly includes an internal and external threaded tube 14 with threads passing through the inner wall of the insert 13, a connecting ring 21 rotatably connected to one end of the internal and external threaded tube 14, and a mounting bracket 15 detachably connected to the end of the internal and external threaded tube 14. The mounting bracket 15 is detachably mounted on the bottom surface of the lower mold 6 by screws.

[0049] A splined shaft 17 is inserted through the other end of the internal and external threaded tube 14. The body of the splined shaft 17 is slidably provided with a support sleeve 18 that is fixed to the bottom surface of the lower mold 6. One end of the splined shaft 17 corresponds to the support frame 9 and is fixed with a pressure-bearing arc plate 19. The other end of the splined shaft 17 is fixed with a threaded head 16 that is threaded to the inner side of the internal and external threaded tube 14.

[0050] A return spring 20 is also provided inside the internal and external threaded tube 14. The return spring 20 is located between the threaded head 16 and the mounting bracket 15.

[0051] By setting up the threaded transmission assembly, precise linkage control between the insert 13 and the connection notch 26 of the lower hydraulic cylinder 7 can be achieved: when the support frame 9 moves to the middle, its side presses the pressure arc plate 19, pushing the spline shaft 17 to slide along the support sleeve 18, and the threaded head 16 slides in the inner and outer threaded tubes 14 and compresses the return spring 20 to deform. Since the threaded head 16 and the inner and outer threaded tubes 14 are threadedly connected, the inner and outer threaded tubes 14 can rotate synchronously during the sliding of the threaded head 16, causing the insert 13 to slide along the bottom surface of the lower mold 6 under the threaded structure, so that one end of it inserted into the connection notch 26 is withdrawn, realizing the separation of the lower mold 6 and the lower hydraulic cylinder 7;

[0052] When the support frame 9 is reset, the return spring 20 rebounds and pushes the threaded head 16, spline shaft 17 and pressure arc plate 19 to reset as a whole. Similarly, it drives the internal and external threaded tubes 14 to rotate in the opposite direction. The insert 13 is re-inserted into the connection notch 26 under the drive of the internal and external threaded tubes 14, restoring the connection between the lower mold 6 and the lower hydraulic cylinder 7.

[0053] Furthermore, referring to Figure 6 As shown, it is worth noting that a stud 22 is vertically fixed at one end of the connecting ring 21 away from the internal and external threaded tube 14, and the end of the stud 22 passes through the mounting bracket 15 and is threadedly connected to a nut 25.

[0054] By setting up the stud 22 and nut 25, the nut 25 is screwed on to detach it from the stud 22, and the screw is loosened to disassemble the mounting bracket 15, thus separating the mounting bracket 15 from the connecting swivel ring 21. This detachable structure design facilitates the individual replacement and maintenance of the vulnerable component return spring 20 in the threaded transmission assembly.

[0055] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0056] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated die-casting device for metal powder cores, the device comprising a base (1), an L-shaped bracket (2) vertically mounted on the base (1), and a platform (3) horizontally mounted on the inner wall of the L-shaped bracket (2), wherein a middle mold (4) is placed on the platform (3), a lower mold (6) is provided below the platform (3) and lower hydraulic cylinder (7) is provided between the lower mold (6) and the base (1), characterized in that, It also includes a protection mechanism for extending the service life of the lower hydraulic cylinder (7); The protection mechanism consists of a bidirectional load-bearing component and a disconnection component; The bidirectional load-bearing component consists of a top support assembly and a drive assembly. The top support assembly is in two sets and is symmetrically distributed on both sides of the lower hydraulic cylinder (7). The base (1) has a drive cavity (27) inside, and the drive assembly is located inside the drive cavity (27). There is a certain gap between the telescopic end of the lower hydraulic cylinder (7) and the lower mold (6). The connecting component consists of two sets, which are located between the two sets of top support components and the lower hydraulic cylinder (7).

2. The automated die-casting device for metal powder cores according to claim 1, characterized in that, The top support assembly is T-shaped in general. The top support assembly consists of a support frame (9) and a horizontal plate (31) fixed to the top of the support frame (9). When the lower mold (6) and the middle mold (4) are closed, the top surface of the horizontal plate (31) and the bottom surface of the lower mold (6) are kept horizontal.

3. The automated die-casting device for metal powder cores according to claim 2, characterized in that, The drive assembly includes a bidirectional lead screw (11) that rotates laterally between the inner walls of both sides of the drive cavity (27) and two symmetrically threaded slides (10) connected to the body of the bidirectional lead screw (11). The two slides (10) correspond one-to-one with the two support frames (9). The top surface of the base (1) is provided with a movable groove (24) for the support frame (9) to pass through and slide. The bottom end of the support frame (9) passes through the movable groove and is fixed perpendicularly to the slide (10).

4. The automated die-casting device for metal powder cores according to claim 2, characterized in that, The connecting component includes an L-shaped insert (13) that slides on the bottom surface of the lower mold (6), and a threaded transmission assembly that cooperates with the support frame (9) to provide movement force for the insert (13). The telescopic end of the lower hydraulic cylinder (7) is provided with a connection notch (26). One end of the insert (13) slides in contact with the bottom surface of the lower mold (6), and the other end of the insert (13) is aligned and inserted into the connection notch (26).

5. The automated die-casting device for metal powder cores according to claim 4, characterized in that, The threaded transmission assembly includes an internal and external threaded tube (14) with threads running through the inner wall of the insert (13), and a connecting ring (21) rotatably connected to one end of the internal and external threaded tube (14). The end of the internal and external threaded tube (14) is detachably connected to a mounting bracket (15), which is detachably mounted on the bottom surface of the lower mold (6) by screws.

6. The automated die-casting device for metal powder cores according to claim 5, characterized in that, The other end of the internal and external threaded tube (14) is provided with a splined shaft (17). The body of the splined shaft (17) is provided with a support sleeve (18) that is fixed to the bottom surface of the lower mold (6). One end of the splined shaft (17) corresponds to the support frame (9) and is fixed with a pressure-bearing arc plate (19). The other end of the splined shaft (17) is fixed with a threaded head (16) that is threaded to the inner side of the internal and external threaded tube (14).

7. The automated die-casting device for metal powder cores according to claim 6, characterized in that, A return spring (20) is also provided inside the internal and external threaded tube (14), and the return spring (20) is located between the threaded head (16) and the mounting bracket (15).

8. The automated die-casting device for metal powder cores according to claim 5, characterized in that, The connecting ring (21) is vertically fixed with a stud (22) at one end away from the internal and external threaded tube (14). The end of the stud (22) passes through the mounting bracket (15) and is threaded with a nut (25).

9. The automated die-casting device for metal powder cores according to claim 3, characterized in that, A drive motor (12) is installed on the outside of the base (1). The output shaft of the drive motor (12) rotates into the drive cavity (27) and is fixedly connected to one end of the bidirectional lead screw (11).

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