Die casting device for processing metal workpieces

Abstract

The application discloses a die-casting forming device for metal workpiece machining and belongs to the technical field of metal die-casting forming devices, which comprises an upper module, a lower module is installed on one side of the upper module, a sprue bushing, a split mechanism, a plug-in sealing structure and a sealing structure are further included, a connecting through hole is formed in the top of the upper module, the outer side of the sprue bushing is connected into the inner cavity of the connecting through hole formed on one side of the upper module, in the application, the sealing cooperation between the outer wall of the breaking punch and the inner wall of the sprue bushing is damaged, gaps exist between the split joint blocks and the inner wall of the sprue bushing, the internal part of the sprue bushing cannot form instantaneous negative pressure, thereby, the high-temperature atomized demolding agent vapor in the cavity and the sprue area is prevented from being sucked into the internal part of the sprue bushing, the demolding agent vapor is prevented from contacting the inner wall of the sprue bushing to form a carbon deposition layer, and thus the quality of the die-casting product and the service life of the die are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of metal die casting forming equipment, and particularly relates to a die casting forming equipment for processing metal workpieces. Background Technology

[0002] Metal die casting is a casting process in which molten metal is rapidly injected into a precision mold cavity under high pressure and then cooled and solidified under pressure. The die casting equipment injects molten metal into the mold cavity through a sprue bushing. During die casting, the molten metal is injected into the mold cavity at high speed through the sprue bushing under the high pressure of the punch, and the filling is completed in a very short time to obtain castings with high dimensional accuracy and good surface quality.

[0003] During the return stroke of the punch, due to the good sealing between the one-piece punch and the inner wall of the sprue bushing, a momentary negative pressure is formed inside the sprue bushing. After the mold is sprayed with release agent, there is a large amount of high-temperature atomized release agent vapor and water vapor in the cavity and sprue area. This momentary negative pressure will draw the release agent vapor back into the interior along the sprue bushing. After the vapor comes into contact with the high-temperature inner wall of the sprue bushing, it forms a hard, difficult-to-remove carbon deposit layer that adheres to the inner wall of the sprue bushing. This leads to increased punch movement resistance and decreased sealing performance, affecting the quality of die-cast products and the service life of the mold, indicating room for improvement. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that instantaneous negative pressure will draw mold release agent vapor back into the sprue bushing, and after the vapor comes into contact with the high-temperature inner wall of the sprue bushing, it will form a hard, difficult-to-remove carbon deposit layer that adheres to the inner wall of the sprue bushing, thereby increasing the resistance of the punch movement, reducing the sealing performance, and affecting the quality of die-cast products and the service life of the mold. Therefore, a die-casting molding device for metal workpiece processing is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a die-casting forming device for processing metal workpieces, comprising an upper module, a lower module installed on one side of the upper module, and further comprising a sprue sleeve, a splitting mechanism, an insertion sealing structure, and a sealing structure; The upper module has a connecting through hole at the top, and the outer side of the sprue sleeve is connected to the inner cavity of the connecting through hole on one side of the upper module. A drive rod is provided in the inner cavity of the sprue sleeve, and a first movable cavity is provided at one end of the drive rod. The splitting mechanism is disposed in the first movable cavity. The splitting mechanism includes two first splicing blocks, which are centrally symmetrically arranged. A second splicing block is disposed on an adjacent side of the two first splicing blocks, which are also centrally symmetrically arranged. The two first splicing blocks and the two second splicing blocks can be spliced ​​together to form a cylinder. A first connecting rod is connected to the top of the first splicing block. The movement of the first connecting rod drives the two first splicing blocks to move, so that the two first splicing blocks move away from the two second splicing blocks along the axis of the sprue sleeve. The second splicing block has a second movable cavity on both sides, and multiple plug-in sealing structures are set in the second movable cavity at the corresponding positions. The upper module has a first mounting groove on one side. The closed structure is disposed in the first mounting groove. The closed structure includes a rotating plate. The outer side of the rotating plate is attached to the inner cavity of the first mounting groove. A third mounting groove is opened on one side of the rotating plate. A compression sealing structure is disposed in the third mounting groove.

[0006] Preferably, the splitting mechanism further includes a first movable plate and a second connecting rod; The outer side of the first movable plate is slidably connected to the first movable cavity. The first movable cavity has two through holes. One end of the first connecting rod extends into the first movable cavity through the through hole. The first connecting rod is located at one end of the first movable cavity and is connected to the corresponding position at the bottom of the first movable plate. One end of each of the two second connecting rods is connected to one side of the second splicing block at the corresponding position, and the other end of the second connecting rod is connected to one end of the drive rod at the corresponding position. Both the two second splicing blocks and one side of the two first splicing blocks are attached to the corresponding positions inside the sprue sleeve.

[0007] Preferably, the splitting mechanism further includes an electric push rod; The electric push rod is disposed in the first movable cavity. One end of the electric push rod is connected to the top of the first movable plate, and the other end of the electric push rod is connected to the first mounting plate. One end of the first mounting plate is connected to the corresponding position in the first movable cavity.

[0008] Preferably, the plug-in sealing structure includes a first connecting plate, a third connecting plate, and a first pressing block; One end of the first connecting plate is connected to the top of the first splicing block at the corresponding position, and a second connecting plate is connected to one side of the first connecting plate; One end of the third connecting plate is connected to one side of the second connecting plate. The inner cavity of the second movable cavity is provided with a through groove. The other end of the third connecting plate extends into the corresponding second movable cavity through the through groove provided in the inner cavity of the corresponding position. The first extrusion block is connected to the third connecting plate on one side of the second movable cavity. The first extrusion block is attached to the second extrusion block on one side. One end of the second extrusion block is connected to the first sealing plate. The second movable cavity has a moving groove. The outer side of the first sealing plate is slidably connected to the moving groove in the second movable cavity at the corresponding position. One side of the first sealing plate is attached to the first splicing block at the corresponding position.

[0009] Preferably, the plug-in sealing structure further includes a spring sheet; Two spring pieces are connected on one side to the corresponding position on one side of the first sealing plate, and the other side of the spring pieces are connected to the corresponding position in the inner cavity of the second movable cavity.

[0010] Preferably, the plug-in sealing structure further includes a first limiting block; Multiple first limiting blocks are connected at one end to corresponding positions on the outside of the first sealing plate. Multiple first limiting grooves are provided in the inner cavity of the second movable cavity. The outer side of the first limiting block is slidably connected to the first limiting groove at the corresponding position.

[0011] Preferably, the enclosed structure further includes a rotating rod; One end of the rotating rod is connected to the top of the rotating plate. A flow hole is provided on one side of the rotating plate. The inner diameter of the flow hole is the same as the inner diameter of the sprue sleeve. The bottom of the rotating plate is attached to one side of the inner cavity of the first mounting groove, and the top of the rotating plate is attached to one side of the inner cavity of the first mounting groove.

[0012] Preferably, the enclosed structure further includes a drive motor, a second mounting plate, and a second limiting block; The upper module has a second mounting slot on one side, and the drive motor is set in the corresponding position of the second mounting slot. The first mounting slot has a rotating hole in its inner cavity. One end of the rotating rod extends into the second mounting slot through the rotating hole in the inner cavity of the first mounting slot. One end of the output shaft of the drive motor is connected to the end of the rotating rod located in the inner cavity of the second mounting slot. One side of the second mounting plate is connected to one end of the drive motor, and the other end of the second mounting plate is connected to the corresponding position in the second mounting groove; Two second limiting blocks are connected at one end to the corresponding position on the outside of the rotating plate. The first mounting groove has a second limiting groove in its inner cavity, and the outer side of the second limiting block is slidably connected to the corresponding position in the inner cavity of the second limiting groove.

[0013] Preferably, the compression sealing structure further includes a second movable plate; The second movable plate is slidably connected to the third mounting groove on the outside. The top of the second movable plate is connected to the second sealing plate. The inner cavity of the third mounting groove is provided with a through groove. The top of the second sealing plate extends to the outside through the through groove in the inner cavity of the third mounting groove. The outer side of the second sealing plate is provided with an extrusion slope. The top of the second sealing plate is attached to one end of the sprue sleeve.

[0014] Preferably, the compression sealing structure further includes a third limiting block and a support spring; Multiple third limiting blocks are connected at one end to corresponding positions on the outside of the second moving plate. Multiple third limiting grooves are provided in the inner cavity of the third mounting groove. The outer side of the third limiting block is slidably connected to the corresponding third limiting groove. One end of each of the multiple support springs is connected to a corresponding position on the bottom of the second movable plate, and the other end of each support spring is connected to a corresponding position inside the third mounting groove.

[0015] 1. In this invention, by setting a splitting mechanism, after die casting is completed, the electric push rod drives the first moving plate and the first connecting rod to move, so that the two first splicing blocks move radially away from the two second splicing blocks, splitting the injection punch into multiple independent blocks, breaking the sealing fit between the outer wall of the punch and the inner wall of the sprue bushing. There are gaps between the split splicing blocks and between the split blocks and the inner wall of the sprue bushing, so that the sprue bushing cannot form an instantaneous negative pressure. This avoids the high-temperature atomized mold release agent vapor in the cavity and sprue area being drawn back into the sprue bushing, effectively preventing the mold release agent vapor from contacting the inner wall of the sprue bushing and forming a carbon deposit layer, thereby improving the quality of die-cast products and the service life of the mold.

[0016] 2. In this invention, by setting an interlocking sealing structure, when the punch is assembled, the first splicing block moves closer to the second splicing block. The first connecting plate, the second connecting plate, and the third connecting plate drive the first extrusion block to move. The first extrusion block and the second extrusion block form a wedge-shaped fit, pushing the first sealing plate to move into the gap between the first splicing block and the second splicing block, thus sealing the gap between the splicing blocks. This allows the punch to automatically seal the gap between each splicing block during the assembly process, preventing high-pressure molten metal from seeping into the gap between each splicing block and ensuring the sealing reliability of the punch during the die-casting process.

[0017] 3. In this invention, by setting up a closed structure and a compression sealing structure, the drive motor drives the rotating plate to rotate, so that the flow hole is aligned or misaligned with the inner cavity of the sprue sleeve, realizing the opening and closing of the sprue sleeve. During die casting, the opening ensures the smooth injection of molten metal, and the closing is synchronized when the punch is disassembled to cut off the backflow channel. In conjunction with the disassembly mechanism, it eliminates the possibility of mold release agent vapor being sucked back into the sprue sleeve from the source. When the flow hole is aligned with the inner cavity of the sprue sleeve, the second sealing plate is always in contact with the end face of the sprue sleeve under the action of the support spring, forming an elastic seal. This realizes the adjustment of the opening and closing of the sprue sleeve and the reliable sealing of the end face, effectively preventing the leakage of molten metal and improving the safety and stability of the die casting process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the disassembled three-dimensional structure of the present invention; Figure 3 This is a cross-sectional three-dimensional structural diagram of the splitting mechanism in this invention; Figure 4 for Figure 3 Enlarged 3D structural diagram of part A; Figure 5This is a cross-sectional three-dimensional structural diagram of the second active cavity in this invention; Figure 6 for Figure 5 Enlarged 3D structural diagram of part B; Figure 7 This is a cross-sectional three-dimensional structural diagram of the plug-in sealing structure in this invention; Figure 8 for Figure 7 Enlarged 3D structural diagram of section C; Figure 9 This is a cross-sectional three-dimensional structural diagram of the closed structure in this invention; Figure 10 for Figure 9 Enlarged 3D structural diagram of section D; Figure 11 This is a cross-sectional three-dimensional structural diagram of the extrusion sealing structure in this invention; Figure 12 for Figure 11 Enlarged 3D structural diagram of part E in the middle.

[0019] Legend: 1. Upper module; 2. Lower module; 3. Sprue sleeve; 4. Drive rod; 5. Splitting mechanism; 501. Electric push rod; 502. First mounting plate; 503. First moving plate; 504. First connecting rod; 505. First splicing block; 506. Second splicing block; 507. Second connecting rod; 6. Insertion sealing structure; 601. First connecting plate; 602. Second connecting plate; 603. Third connecting plate; 604. First extrusion block; 605. Second extrusion block; 606. First sealing plate; 607. Spring; 608. First limiting block; 60 9. First limiting groove; 7. Closed structure; 701. Rotating plate; 702. Flow hole; 703. Rotating rod; 704. Drive motor; 705. Second mounting plate; 706. Second limiting block; 707. Second limiting groove; 8. Extrusion sealing structure; 801. Second moving plate; 802. Second sealing plate; 803. Extrusion inclined surface; 804. Third limiting block; 805. Third limiting groove; 806. Support spring; 9. First mounting groove; 10. Second mounting groove; 11. Third mounting groove; 12. First movable cavity; 13. Second movable cavity. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-4 It is understood that the present invention provides a technical solution: a die casting forming device for processing metal workpieces, including an upper module 1, a lower module 2 installed on one side of the upper module 1, and also including a sprue sleeve 3, a splitting mechanism 5, an insertion sealing structure 6 and a closing structure 7. The top of the upper module 1 has a connecting through hole. The outer side of the sprue sleeve 3 is connected to the inner cavity of the connecting through hole on one side of the upper module 1. A drive rod 4 is provided in the inner cavity of the sprue sleeve 3. A first movable cavity 12 is provided at one end of the drive rod 4. The splitting mechanism 5 is disposed in the first movable cavity 12. The splitting mechanism 5 includes two first splicing blocks 505, which are centrally symmetrically arranged. A second splicing block 506 is disposed on the adjacent side of the two first splicing blocks 505, which are centrally symmetrically arranged. The two first splicing blocks 505 and the two second splicing blocks 506 can be spliced ​​to form a cylinder. A first connecting rod 504 is connected to the top of the first splicing block 505. The movement of the first connecting rod 504 drives the two first splicing blocks 505 to move, so that the two first splicing blocks 505 move away from the two second splicing blocks 506 along the axis of the sprue sleeve 3. The second splicing block 506 has a second movable cavity 13 on both sides, and multiple plug-in sealing structures 6 are set in the corresponding second movable cavity 13. The upper module 1 has a first mounting groove 9 on one side. The closed structure 7 is disposed in the first mounting groove 9. The closed structure 7 includes a rotating plate 701. The outer side of the rotating plate 701 is attached to the inner cavity of the first mounting groove 9. A third mounting groove 11 is opened on one side of the rotating plate 701. A compression sealing structure 8 is disposed in the third mounting groove 11. The splitting mechanism 5 also includes a first movable plate 503 and a second connecting rod 507; The outer side of the first movable plate 503 is slidably connected to the first movable cavity 12. The first movable cavity 12 has two through holes. One end of the first connecting rod 504 extends into the first movable cavity 12 through the through holes. The first connecting rod 504 is located in the first movable cavity 12 and is connected to the corresponding position at the bottom of the first movable plate 503. One end of each of the two second connecting rods 507 is connected to one side of the corresponding second splicing block 506, and the other end of the second connecting rod 507 is connected to one end of the drive rod 4 at the corresponding position. Both the two second splicing blocks 506 and one side of the two first splicing blocks (505) are attached to the corresponding positions inside the gate sleeve 3. The splitting mechanism 5 also includes an electric push rod 501; An electric push rod 501 is disposed in the first movable cavity 12. One end of the electric push rod 501 is connected to the top of the first movable plate 503, and the other end of the electric push rod 501 is connected to the first mounting plate 502. One end of the first mounting plate 502 is connected to the corresponding position in the first movable cavity 12.

[0022] Specifically, after die casting is completed, the electric push rod 501 retracts via the splitting mechanism 5. The electric push rod 501 drives the first moving plate 503 to move upward. The first moving plate 503, through the first connecting rod 504, drives the two first splicing blocks 505 to move radially away from the two second splicing blocks 506, splitting the injection punch into multiple independent blocks. This disrupts the sealing fit between the outer wall of the punch and the inner wall of the sprue sleeve 3. During the return stroke of the punch, gaps exist between the split splicing blocks and between the punch and the inner wall of the sprue sleeve 3. Therefore, a momentary negative pressure cannot be formed inside the sprue sleeve 3, thus preventing damage to the cavity and sprue. The high-temperature atomized release agent vapor in the area is drawn back into the sprue sleeve 3, effectively preventing the release agent vapor from contacting the high-temperature inner wall of the sprue sleeve 3 and causing high-temperature pyrolysis to form a hard carbon black carbon deposit layer. When the punch is assembled, the electric push rod 501 is activated to extend. The electric push rod 501 pushes the first moving plate 503 to move downward. The first moving plate 503 drives the two first splicing blocks 505 to move radially toward the two second splicing blocks 506 through the first connecting rod 504 until the adjacent splicing blocks fit together, restoring the complete cylindrical punch structure. A sealing fit is formed between the outer wall of the punch and the inner wall of the sprue sleeve 3.

[0023] Please see Figures 5-8 It can be seen that the plug-in sealing structure 6 includes a first connecting plate 601, a third connecting plate 603, and a first pressing block 604; One end of the first connecting plate 601 is connected to the top of the first splicing block 505 at the corresponding position, and a second connecting plate 602 is connected to one side of the first connecting plate 601. One end of the third connecting plate 603 is connected to one side of the second connecting plate 602. A through groove is provided in the inner cavity of the second movable cavity 13. The other end of the third connecting plate 603 extends into the corresponding second movable cavity 13 through the through groove provided in the inner cavity of the corresponding position. The first extrusion block 604 is connected to the third connecting plate 603 on one side of the inner cavity of the second movable cavity 13. The first extrusion block 604 is attached to the second extrusion block 605 on one side. One end of the second extrusion block 605 is connected to the first sealing plate 606. The inner cavity of the second movable cavity 13 is provided with a moving groove. The outer side of the first sealing plate 606 is slidably connected to the moving groove provided in the inner cavity of the second movable cavity 13 at the corresponding position. One side of the first sealing plate 606 is attached to the side of the first splicing block 505 at the corresponding position. The plug-in sealing structure 6 also includes a spring piece 607; Two spring pieces 607 are connected on one side to the corresponding position on one side of the first sealing plate 606, and the other side of the spring pieces 607 are connected to the corresponding position in the inner cavity of the second movable cavity 13. The plug-in sealing structure 6 also includes a first limiting block 608; Multiple first limiting blocks 608 are connected at one end to the corresponding position on the outside of the first sealing plate 606. Multiple first limiting grooves 609 are opened in the inner cavity of the second movable cavity 13. The outer side of the first limiting block 608 is slidably connected to the corresponding position of the first limiting groove 609.

[0024] Specifically, during punch assembly, through the provided plug-in sealing structure 6, when the first splicing block 505 and the second splicing block 506 approach each other, the first splicing block 505, through the first connecting plate 601, the second connecting plate 602, and the third connecting plate 603, drives the first extrusion block 604 to move closer to the second extrusion block 605. The wedge-shaped fit between the first extrusion block 604 and the second extrusion block 605 converts the horizontal thrust into a vertical driving force, pushing the second extrusion block 605 and the first sealing plate 606 towards the gap between the first splicing block 505 and the second splicing block 506. The first sealing plate 606 is positioned at the first limiting block 6. Guided by the first limiting groove 609, the 08 slides smoothly until it fits tightly against the gap, forming an effective seal between the splicing blocks and preventing high-pressure molten metal from seeping into the gap between the splicing blocks. This ensures the sealing reliability of the punch during the die-casting process. When the first splicing block 505 moves away from the second splicing block 506 during disassembly, the first connecting plate 601, the second connecting plate 602, and the third connecting plate 603 drive the first extrusion block 604 away from the second extrusion block 605, releasing the wedge fit. The first sealing plate 606 automatically resets and contracts under the elastic force of the spring piece 607, releasing the seal on the gap between the splicing blocks and facilitating the disassembly and removal of the punch.

[0025] Please see Figures 9-10 It can be seen that the closed structure 7 also includes a rotating rod 703; One end of the rotating rod 703 is connected to the top of the rotating plate 701. A flow hole 702 is provided on one side of the rotating plate 701. The inner diameter of the flow hole 702 is the same as the inner diameter of the sprue sleeve 3. The bottom of the rotating plate 701 is attached to one side of the inner cavity of the first mounting groove 9, and the top of the rotating plate 701 is attached to one side of the inner cavity of the first mounting groove 9. The enclosed structure 7 also includes a drive motor 704, a second mounting plate 705, and a second limiting block 706; A second mounting slot 10 is provided on one side of the upper module 1. The drive motor 704 is set in the corresponding position of the second mounting slot 10. A rotating hole is provided in the inner cavity of the first mounting slot 9. One end of the rotating rod 703 extends into the second mounting slot 10 through the rotating hole in the inner cavity of the first mounting slot 9. One end of the output shaft of the drive motor 704 is connected to one end of the rotating rod 703 located in the inner cavity of the second mounting slot 10. One side of the second mounting plate 705 is connected to one end of the drive motor 704, and the other end of the second mounting plate 705 is connected to the corresponding position in the second mounting groove 10. Two second limiting blocks 706 are connected at one end to the corresponding position on the outside of the rotating plate 701. The inner cavity of the first mounting groove 9 is provided with a second limiting groove 707. The outer side of the second limiting block 706 is slidably connected to the corresponding position in the inner cavity of the second limiting groove 707.

[0026] Specifically, when it is necessary to open the sprue sleeve 3 for die casting, the drive motor 704 is started through the set closed structure 7. The drive motor 704 drives the rotating plate 701 to rotate through the rotating rod 703 until the flow hole 702 is completely aligned with the inner cavity of the sprue sleeve 3. The molten metal can be smoothly injected into the cavity through the sprue sleeve 3 and the flow hole 702. When the die casting is completed and the punch needs to be split and returned, the drive motor 704 rotates in the opposite direction, driving the rotating plate 701 to rotate until the flow hole 702 is completely misaligned with the inner cavity of the sprue sleeve 3. At this time, the solid part of the rotating plate 701 closes the channel of the sprue sleeve 3, and cooperates with the splitting mechanism 5 to cut off the backflow channel of the release agent vapor.

[0027] Please see Figures 11-12 It can be seen that the compression sealing structure 8 also includes a second movable plate 801; The second movable plate 801 is slidably connected to the third mounting groove 11 on the outside. The second movable plate 801 is connected to the top of the second sealing plate 802. The third mounting groove 11 has a through groove in its inner cavity. The top of the second sealing plate 802 extends to the outside through the through groove in the inner cavity of the third mounting groove 11. The second sealing plate 802 has an extrusion slope 803 on its outer side. The top of the second sealing plate 802 is attached to one end of the gate sleeve 3. The compression sealing structure 8 also includes a third limiting block 804 and a support spring 806; Multiple third limiting blocks 804 are connected at one end to the corresponding position on the outside of the second moving plate 801. Multiple third limiting grooves 805 are opened in the inner cavity of the third mounting groove 11. The outer side of the third limiting block 804 is slidably connected to the corresponding position of the third limiting groove 805. One end of each of the multiple support springs 806 is connected to the corresponding position at the bottom of the second movable plate 801, and the other end of each support spring 806 is connected to the corresponding position inside the third mounting groove 11.

[0028] Specifically, when the rotating plate 701 rotates until the flow hole 702 is aligned with the inner cavity of the sprue sleeve 3, the compression sealing structure 8 makes the second sealing plate 802 adhere to the end face of the sprue sleeve 3 under the elastic force of the support spring 806, forming a seal between the contact surface between the sprue sleeve 3 and the rotating plate 701, preventing molten metal from leaking from the end face of the sprue sleeve 3. When the rotating plate 701 rotates, the top surface of the second sealing plate 802 always maintains sliding contact with the end face of the sprue sleeve 3, and the compression slope 803 facilitates the smooth passage of the rotating plate 701 through the end face of the sprue sleeve 3 when it rotates.

[0029] Working principle: After die casting is completed, the electric push rod 501 is activated to retract through the set splitting mechanism 5. The electric push rod 501 drives the first moving plate 503 to move upward. The first moving plate 503 drives the two first splicing blocks 505 to move radially away from the two second splicing blocks 506 through the first connecting rod 504, splitting the injection punch into multiple independent blocks and breaking the sealing fit between the outer wall of the punch and the inner wall of the sprue sleeve 3. When the punch returns, there are gaps between the disassembled splice blocks and between the splice blocks and the inner wall of the sprue sleeve 3, so that an instantaneous negative pressure cannot be formed inside the sprue sleeve 3. When the punch is assembled, the electric push rod 501 is extended and the electric push rod 501 pushes the first moving plate 503 to move downward. The first moving plate 503 drives the two first splicing blocks 505 to move radially toward the two second splicing blocks 506 through the first connecting rod 504 until the adjacent splicing blocks fit together and restore the complete cylindrical punch structure. During punch assembly, when the first splicing block 505 and the second splicing block 506 approach each other, the first splicing block 505 drives the first extrusion block 604 to move closer to the second extrusion block 605 through the first connecting plate 601, the second connecting plate 602 and the third connecting plate 603. The wedge-shaped fit between the first extrusion block 604 and the second extrusion block 605 converts the horizontal thrust into a vertical driving force, pushing the second extrusion block 605 and the first sealing plate 606 to move towards the gap between the first splicing block 505 and the second splicing block 506. The first sealing plate 606 slides smoothly under the guidance of the first limiting block 608 and the first limiting groove 609 until it fits tightly against the gap, forming an effective seal for the gap between the splicing blocks. When it is necessary to open the sprue sleeve 3 for die casting, start the drive motor 704. The drive motor 704 drives the rotating plate 701 to rotate through the rotating rod 703 until the flow hole 702 is completely aligned with the inner cavity of the sprue sleeve 3. The molten metal can be smoothly injected into the cavity through the sprue sleeve 3 and the flow hole 702. When die casting is completed and the punch needs to be split and returned, the drive motor 704 rotates in the opposite direction, causing the rotating plate 701 to rotate to a position where the flow hole 702 and the inner cavity of the sprue sleeve 3 are completely misaligned. At this time, the solid part of the rotating plate 701 closes the channel of the sprue sleeve 3 and works with the splitting mechanism 5 to cut off the backflow channel of the release agent vapor. When the rotating plate 701 rotates until the flow hole 702 is aligned with the inner cavity of the sprue sleeve 3, the second sealing plate 802 is pressed against the end face of the sprue sleeve 3 under the elastic force of the support spring 806, forming a seal between the sprue sleeve 3 and the rotating plate 701, preventing molten metal from leaking from the end face of the sprue sleeve 3.

[0030] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A die-casting forming apparatus for processing metal workpieces, comprising an upper module (1), wherein a lower module (2) is mounted on one side of the upper module (1), characterized in that, Also includes: The upper module (1) has a connecting through hole at the top of the sprue sleeve (3). The outer side of the sprue sleeve (3) is connected to the inner cavity of the connecting through hole on one side of the upper module (1). A drive rod (4) is provided in the inner cavity of the sprue sleeve (3). A first movable cavity (12) is provided at one end of the drive rod (4). The splitting mechanism (5) is located in the first movable cavity (12). The splitting mechanism (5) includes two first splicing blocks (505), which are centrally symmetrical. A second splicing block (506) is provided on the adjacent side of the two first splicing blocks (505), which are centrally symmetrical. The two first splicing blocks (505) and the two second splicing blocks (506) can be spliced ​​together to form a cylinder. A first connecting rod (504) is connected to the top of the first splicing block (505). The movement of the first connecting rod (504) drives the two first splicing blocks (505) to move, so that the two first splicing blocks (505) move away from the two second splicing blocks (506) along the axis of the sprue sleeve (3). The plug-in sealing structure (6) has a second movable cavity (13) on both sides of the second splicing block (506), and multiple plug-in sealing structures (6) are set in the corresponding second movable cavities (13). The upper module (1) has a first mounting groove (9) on one side. A closed structure (7) is provided in the first mounting groove (9). The closed structure (7) includes a rotating plate (701). The outer side of the rotating plate (701) is attached to the inner cavity of the first mounting groove (9). A third mounting groove (11) is provided on one side of the rotating plate (701). A compression sealing structure (8) is provided in the third mounting groove (11).

2. The die-casting forming apparatus for metal workpiece processing according to claim 1, characterized in that, The splitting mechanism (5) also includes: The first movable plate (503) is slidably connected to the outside of the first movable cavity (12). The first movable cavity (12) has two through holes. One end of the first connecting rod (504) extends into the first movable cavity (12) through the through hole. The first connecting rod (504) is located at one end of the first movable cavity (12) and connected to the corresponding position at the bottom of the first movable plate (503). The second connecting rod (507) has one end connected to the side of the corresponding second splicing block (506), and the other end connected to the corresponding position of one end of the drive rod (4). The two second splicing blocks (506) and the two first splicing blocks (505) are both attached to the corresponding positions inside the sprue sleeve (3).

3. The die-casting forming apparatus for metal workpiece processing according to claim 2, characterized in that, The splitting mechanism (5) also includes: An electric push rod (501) is disposed in the first movable cavity (12). One end of the electric push rod (501) is connected to the top of the first movable plate (503), and the other end of the electric push rod (501) is connected to a first mounting plate (502). One end of the first mounting plate (502) is connected to a corresponding position in the first movable cavity (12).

4. The die-casting forming apparatus for metal workpiece processing according to claim 1, characterized in that, The plug-in sealing structure (6) includes: A first connecting plate (601) is connected at one end to the top of the first splicing block (505) at the corresponding position, and a second connecting plate (602) is connected to one side of the first connecting plate (601). The third connecting plate (603) is connected at one end to one side of the second connecting plate (602). The inner cavity of the second movable cavity (13) is provided with a through groove. The other end of the third connecting plate (603) extends into the corresponding second movable cavity (13) through the through groove opened in the inner cavity of the corresponding position. The first extrusion block (604) is connected to the third connecting plate (603) on one side of the inner cavity of the second movable cavity (13). The first extrusion block (604) is attached to the second extrusion block (605) on one side. The second extrusion block (605) is connected to the first sealing plate (606) at one end. The inner cavity of the second movable cavity (13) is provided with a moving groove. The outer side of the first sealing plate (606) is slidably connected to the moving groove opened in the inner cavity of the second movable cavity (13) at the corresponding position. The first sealing plate (606) is attached to the side of the first splicing block (505) at the corresponding position.

5. The die-casting forming apparatus for metal workpiece processing according to claim 4, characterized in that, The plug-in sealing structure (6) also includes: Two springs (607) are connected on one side to the corresponding position on one side of the first sealing plate (606), and the other side of the springs (607) is connected to the corresponding position in the inner cavity of the second movable cavity (13).

6. The die-casting forming apparatus for metal workpiece processing according to claim 5, characterized in that, The plug-in sealing structure (6) also includes: The first limiting block (608) has one end connected to the corresponding position on the outside of the first sealing plate (606). The inner cavity of the second active cavity (13) is provided with multiple first limiting grooves (609). The outer side of the first limiting block (608) is slidably connected to the corresponding position of the first limiting groove (609).

7. The die-casting forming apparatus for metal workpiece processing according to claim 1, characterized in that, The closed structure (7) also includes: A rotating rod (703) is connected at one end to the top of a rotating plate (701). A flow hole (702) is provided on one side of the rotating plate (701). The inner diameter of the flow hole (702) is the same as the inner diameter of the sprue sleeve (3). The bottom of the rotating plate (701) is attached to one side of the inner cavity of the first mounting groove (9), and the top of the rotating plate (701) is attached to one side of the inner cavity of the first mounting groove (9).

8. The die-casting forming apparatus for metal workpiece processing according to claim 7, characterized in that, The closed structure (7) also includes: The drive motor (704) has a second mounting slot (10) on one side of the upper module (1). The drive motor (704) is set in the second mounting slot (10) at the corresponding position. The first mounting slot (9) has a rotating hole in its inner cavity. One end of the rotating rod (703) extends into the second mounting slot (10) through the rotating hole in the inner cavity of the first mounting slot (9). One end of the output shaft of the drive motor (704) is connected to the rotating rod (703) at one end of the inner cavity of the second mounting slot (10). The second mounting plate (705) has one side connected to one end of the drive motor (704) and the other end connected to the corresponding position in the second mounting groove (10). The second limiting block (706) has one end connected to the corresponding position on the outside of the rotating plate (701). The inner cavity of the first mounting groove (9) is provided with a second limiting groove (707). The outer side of the second limiting block (706) is slidably connected to the corresponding position in the inner cavity of the second limiting groove (707).

9. The die-casting forming apparatus for processing metal workpieces according to claim 1, characterized in that, The extrusion sealing structure (8) further includes: The second movable plate (801) is slidably connected to the third mounting groove (11) on the outside. The top of the second movable plate (801) is connected to the second sealing plate (802). The inner cavity of the third mounting groove (11) is provided with a through groove. The top of the second sealing plate (802) extends to the outside through the through groove in the inner cavity of the third mounting groove (11). The outer side of the second sealing plate (802) is provided with an extrusion slope (803). The top of the second sealing plate (802) is attached to one end of the sprue sleeve (3).

10. The die-casting forming apparatus for metal workpiece processing according to claim 9, characterized in that, The extrusion sealing structure (8) further includes: The third limiting block (804) has one end connected to the corresponding position on the outside of the second moving plate (801). The inner cavity of the third mounting groove (11) is provided with a plurality of third limiting grooves (805). The outer side of the third limiting block (804) is slidably connected to the corresponding position of the third limiting groove (805). Support springs (806) are connected at one end to the corresponding position at the bottom of the second movable plate (801), and at the other end to the corresponding position in the inner cavity of the third mounting groove (11).

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