Metal piece die-casting forming device with protective structure

Abstract

The utility model relates to the technical field of die-casting forming, and discloses a metal piece die-casting forming device with a protection structure, which comprises a processing table, a protection shell is arranged on the processing table, a lower die is arranged on the processing table, an upper die is arranged on the inner side of the protection shell, and a bottom shell is sleeved on the outer side of the lower die. The outer side of the upper die is sleeved with a top shell, a fixing mechanism is arranged on the machining table, a machining mechanism is arranged on the protective shell, the fixing mechanism is composed of a positioning assembly and a fixing assembly, and the machining mechanism is composed of a die-casting assembly, a linkage assembly and a cleaning assembly. According to the die-casting die, splashing of overheated molten metal in the die-casting process can be avoided, meanwhile, a worker can be protected, a user can disassemble and assemble the top shell and the bottom shell conveniently, the bottom shell and the top shell can be replaced conveniently, the lower die can be cleaned, and therefore the quality of a workpiece obtained after die-casting is indirectly improved.

Description

Technical Field

[0001] This utility model relates to the field of die casting technology, specifically to a die casting device for metal parts with a protective structure. Background Technology

[0002] Die casting, short for pressure casting, is a method of obtaining castings by filling the cavity of a die casting mold with liquid or semi-liquid metal at high speed under high pressure and then rapidly solidifying it under pressure. During the die casting process, the overheated molten metal can easily splash and injure workers.

[0003] Chinese Patent Application No. 202322124140.7 discloses a metal die-casting molding device with a protective structure, including a base and a U-shaped frame. The base is fixedly connected to the top of the U-shaped frame, and two cylinders are fixedly connected to the top of the U-shaped frame. The piston rods of the cylinders extend into the interior of the U-shaped frame. A movable plate is fixedly connected between the piston rods of the two cylinders. An upper mold is fixedly connected to the bottom of the movable plate, and a protective plate is fixedly connected to the bottom of the movable plate and to one side of the upper mold. The beneficial effect of this utility model is that by setting the protective plate and the U-shaped protective cover, the piston rod of the cylinder drives the movable plate to move downward, and then the movable plate drives the upper mold and the protective plate to move downward to the lower mold. At the same time, the placement plate drives the U-shaped protective cover to move upward, and then the U-shaped protective cover slides through the U-shaped groove to the top of the base. Then the U-shaped protective cover and the protective plate are assembled into a whole, thereby achieving the purpose of preventing overheated molten metal from splashing during the die-casting process and protecting the workers.

[0004] However, in the above technical solution, since the U-shaped protective cover and the protective plate are fixedly connected to the placement plate and the moving plate respectively, it is inconvenient for users to disassemble the U-shaped protective cover and the protective plate, which makes it inconvenient for users to clean and replace the U-shaped protective cover and the protective plate, thus reducing its practicality. Utility Model Content

[0005] The purpose of this utility model is to provide a metal die-casting molding device with a protective structure, which solves the problem in the above-mentioned technical solution that, since the U-shaped protective cover and the protective plate are fixedly connected to the placement plate and the moving plate respectively, it is inconvenient for users to disassemble the U-shaped protective cover and the protective plate, thus making it inconvenient for users to clean and replace the U-shaped protective cover and the protective plate, thereby reducing its practicality.

[0006] This utility model provides the following technical solution: a metal part die-casting forming device with a protective structure, including a processing table, a protective shell provided on the processing table, a lower mold provided on the processing table, an upper mold provided inside the protective shell, a bottom shell fitted outside the lower mold, and a top shell fitted outside the upper mold. The bottom shell and top shell are respectively provided with through holes adapted to the dimensions of the lower mold and the upper mold. The dimensions of the bottom shell are adapted to the top shell. A fixing mechanism is provided on the processing table, and a processing mechanism is provided on the protective shell. The fixing mechanism consists of a positioning component and a fixing component. The processing mechanism consists of a die-casting component, a linkage component, and a cleaning component.

[0007] The linkage assembly includes two movable plates, two driven rods, and a drive assembly. The two movable plates and the two driven rods are all connected to the drive assembly, and the positions of the two movable plates correspond to the die-casting assembly.

[0008] As a preferred embodiment of the above technical solution, the die-casting assembly includes a pressure plate, two hydraulic cylinders, two limiting holes, and two limiting rods. The two hydraulic cylinders are fixedly connected to the protective shell, and the output shafts of the two hydraulic cylinders pass through the protective shell and are fixedly connected to the top surface of the pressure plate. The upper mold is fixedly connected to the bottom surface of the pressure plate. The two limiting rods are respectively fixedly connected to the inner sides of the two limiting holes, and the two limiting rods are slidably connected to the pressure plate. The two limiting holes are respectively opened at both ends of the protective shell, and the positions of the two limiting holes correspond to each other.

[0009] As a preferred embodiment of the above technical solution, the positioning component includes positioning holes, positioning strips, and sliding grooves. There are two sets of positioning holes, positioning strips, and sliding grooves, and each set has two positioning holes. The two sets of positioning holes are respectively opened on the processing table and the pressure plate, and the two sets of positioning holes respectively penetrate the processing table and the pressure plate. The two sets of positioning strips are respectively inserted into the two sets of positioning holes, and the two sets of positioning strips are respectively fixedly connected to the bottom shell and the top shell. The two sets of sliding grooves are respectively opened on the two sets of positioning strips, and the openings of the two sets of sliding grooves face the drive component.

[0010] As a preferred embodiment of the above technical solution, the fixing component includes a groove, a fixing rod, a fixing spring, a slider, a crossbar, and a pull rod. There are two of each of the groove, fixing rod, fixing spring, slider, and pull rod. The number of crossbars is the same as that of the slide groove. The two grooves are respectively formed on the pressure plate and the processing table, and the two grooves are respectively distributed on the top and bottom surfaces of the pressure plate and the processing table. The two fixing rods are respectively fixedly connected to the inner sides of the two grooves. The two sliders are respectively slidably connected to the two fixing rods. The two sets of crossbars are respectively fixedly connected to the two sliders, and the spacing between the two crossbars in each set is distributed. The two sets of crossbars are respectively slidably connected to the inner sides of the two sets of slide grooves. The two pull rods are respectively fixedly connected to one of the crossbars in the two sets of crossbars.

[0011] As a preferred embodiment of the above technical solution, the drive assembly includes two connecting pipes, two active rods, two active push plates, two driven push plates, and two return springs. Both connecting pipes are fixedly connected to the protective shell, with one end extending into the inner side of the protective shell and the other end inclined. One end of each of the two active rods is fixedly connected to two movable plates, and the other end is fixedly connected to two active push plates. The two active push plates and two driven push plates are slidably connected within the two connecting pipes. The two driven push plates are fixedly connected to two driven rods, and hydraulic oil is filled between the two driven push plates. One end of each of the two return springs is fixedly connected to one of the two movable plates, and the other end is fixedly connected to each of the two connecting pipes.

[0012] As a preferred embodiment of the above technical solution, the cleaning assembly includes a switch, a guide rod, an air pump, a delivery pipe, an air pipe, and several air nozzles. The switch is located on the top of the inner side of the protective shell. The guide rod is fixedly connected to the top of the moving plate. The air pump is located on the top of the protective shell. One end of the delivery pipe is connected to the air pump, and the other end of the delivery pipe is connected to the air pipe. The air pipe is mounted on two driven rods. Each air nozzle is fixedly connected to the air pipe, and each air nozzle is distributed facing the lower mold. Each air nozzle is distributed on the side of the air pipe away from the delivery pipe. The switch is electrically connected to the air pump.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model comprises a processing table, a protective shell, a lower mold, an upper mold, a bottom shell, a top shell, a fixing mechanism, and a processing mechanism. During use, the die-casting assembly drives the upper mold and top shell to move, causing the upper mold to contact the lower mold and die-cast the workpiece. The top shell engages with the bottom shell, preventing overheating and molten metal splashing during die-casting. To disassemble the top or bottom shell, a pull rod is pulled. The pull rod moves a slider on a fixing rod, which in turn moves a crossbar. This crossbar movement compresses a fixing spring, causing the crossbar to slide out of the groove on the positioning strip. The positioning strip is no longer fixed, allowing the user to disassemble the bottom and top shells. A new positioning strip is then inserted into the positioning hole. Releasing the pull rod causes it to return to its original position under the spring force of the fixing spring, allowing the crossbar to slide back into the groove. The bottom or top shell can then be fixed again before moving the lower mold... Before the molten metal is filled into the die, a hydraulic cylinder can move the pressure plate upwards. The movement of the pressure plate moves the moving plate and guide rod. The movement of the moving plate compresses two return springs and drives two active push plates through two active rods. The movement of the two active push plates transmits pressure to two driven push plates through hydraulic oil. At this time, the two driven push plates drive two driven rods to extend, and the air pipe is pushed out. When the guide rod on the moving plate moves to the position of contact with the switch, the air pipe extends to its maximum position. At the same time, the air pump works, delivering compressed air through the delivery pipe to the air pipe, and then spraying it out through the air nozzle on the outside of the air pipe. This can clean the lower die, which not only avoids the splashing of overheated molten metal during the die casting process, but also protects the workers. It also makes it convenient for users to disassemble and assemble the top and bottom shells, making it easy to replace the top and bottom shells. Furthermore, it can clean the lower die, thereby indirectly improving the quality of the die-cast workpiece. Attached Figure Description

[0015] Figure 1 A first-view schematic diagram of a metal die-casting forming device with a protective structure;

[0016] Figure 2 This is a second-view schematic diagram of a metal die-casting forming device with a protective structure.

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 4 A first side sectional view of a metal part die-casting forming device with a protective structure;

[0019] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B;

[0020] Figure 6This is a second side sectional view of a metal part die-casting forming device with a protective structure;

[0021] Figure 7 This is a third side sectional view of a metal part die-casting forming device with a protective structure;

[0022] Figure 8 This is a top view of the pressure plate.

[0023] In the diagram: 1. Processing table; 2. Protective shell; 3. Lower mold; 4. Upper mold; 5. Bottom shell; 6. Top shell;

[0024] Linkage components: 11. Moving plate; 12. Driven rod;

[0025] Die-casting components: 21. Hydraulic cylinder; 22. Limiting hole; 23. Pressure plate; 24. Limiting rod;

[0026] Positioning components: 31. Positioning hole; 32. Positioning strip; 33. Slide groove;

[0027] Fixed components: 41. Groove; 42. Fixing rod; 43. Fixing spring; 44. Slider; 45. Crossbar; 46. Pull rod;

[0028] Drive components: 51. Connecting pipe; 52. Driving rod; 53. Driving push plate; 54. Driven push plate; 55. Return spring;

[0029] Cleaning components: 61. Switch; 62. Guide rod; 63. Air pump; 64. Delivery pipe; 65. Air hose; 66. Air nozzle. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] like Figures 1-8 As shown, a metal die-casting forming device with a protective structure includes a processing table 1, a protective shell 2 on the processing table 1, a lower mold 3 on the processing table 1, an upper mold 4 inside the protective shell 2, a bottom shell 5 on the outer side of the lower mold 3, and a top shell 6 on the outer side of the upper mold 4. The bottom shell 5 and the top shell 6 are respectively provided with through holes adapted to the dimensions of the lower mold 3 and the upper mold 4. The dimensions of the bottom shell 5 are adapted to the top shell 6. A fixing mechanism is provided on the processing table 1, and a processing mechanism is provided on the protective shell 2. The fixing mechanism consists of a positioning component and a fixing component. The processing mechanism consists of a die-casting component, a linkage component, and a cleaning component. The linkage component includes two moving plates 11, two driven rods 12, and a driving component. The two moving plates 11 and the two driven rods 12 are all connected to the driving component, and the positions of the two moving plates 11 correspond to the die-casting component.

[0032] In use, the user can die-cast the workpiece through the die-casting component to complete the die-casting work. Subsequently, the die-casting component can drive the moving plate 11 to move. The movement of the moving plate 11 will drive the two driven rods 12 to extend with the cooperation of the drive component. At this time, the cleaning component works to clean the lower mold 3. Furthermore, the user can disassemble the bottom shell 5 and the top shell 6 through the cooperation of the positioning component and the fixing component, thereby improving practicality.

[0033] Furthermore, the die-casting assembly includes a pressure plate 23, two hydraulic cylinders 21, two limiting holes 22, and two limiting rods 24. Both hydraulic cylinders 21 are fixedly connected to the protective shell 2, and the output shafts of both hydraulic cylinders 21 pass through the protective shell 2 and are fixedly connected to the top surface of the pressure plate 23. The upper mold 4 is fixedly connected to the bottom surface of the pressure plate 23. The two limiting rods 24 are respectively fixedly connected to the inner sides of the two limiting holes 22, and both limiting rods 24 are slidably connected to the pressure plate 23. The two limiting holes 22 are respectively opened at both ends of the protective shell 2, and their positions correspond. In use, the two hydraulic cylinders 21 can work to move the pressure plate 23 through the limiting rods 24. The movement of the pressure plate 23 drives the upper mold 4 and the top shell 6 to move. Then, the upper mold 4 will contact the lower mold 3, thereby die-casting the workpiece, while the top shell 6 will engage with the bottom shell 5. This avoids the problem of overheated molten metal splashing during the die-casting process.

[0034] Furthermore, the positioning assembly includes positioning holes 31, positioning strips 32, and sliding grooves 33. There are two sets of positioning holes 31, positioning strips 32, and sliding grooves 33, and each set has two positioning holes 31 respectively opened on the processing table 1 and the pressure plate 23, and the two sets of positioning holes 31 respectively penetrate the processing table 1 and the pressure plate 23. The two sets of positioning strips 32 are respectively inserted into the two sets of positioning holes 31, and the two sets of positioning strips 32 are respectively fixedly connected to the bottom shell 5 and the top shell 6. The two sets of sliding grooves 33 are respectively opened on the two sets of positioning strips 32, and the groove openings of the two sets of sliding grooves 33 face the drive assembly. When installing the bottom shell 5 or the top shell 6, the crossbar 45 can be retracted through the fixing assembly, and then the positioning strips 32 on the bottom shell 5 or the top shell 6 can be inserted into the positioning holes 31, and then fixed again by the fixing assembly.

[0035] Furthermore, the fixing assembly includes a groove 41, a fixing rod 42, a fixing spring 43, a slider 44, a crossbar 45, and a pull rod 46. There are two grooves 41, two fixing rods 42, two fixing springs 43, two sliders 44, and two pull rods 46. The number of crossbars 45 is the same as that of the slide groove 33. The two grooves 41 are respectively formed on the pressure plate 23 and the processing table 1, and are respectively distributed on the top and bottom surfaces of the pressure plate 23 and the processing table 1. The two fixing rods 42 are respectively fixedly connected to the inner sides of the two grooves 41. The two sliders 44 are respectively slidably connected to the two fixing rods 42. The two sets of crossbars 45 are respectively fixedly connected to the two sliders 44, and the spacing between each set of two crossbars 45 is distributed. The two sets of crossbars 45 are respectively slidably connected to the two sets of... Inside the slide 33, two pull rods 46 are fixedly connected to one of the two sets of crossbars 45. When replacing the top shell 6 or the bottom shell 5, the pull rods 46 can be pulled. The movement of the pull rods 46 causes the slider 44 to slide on the fixed rod 42. The movement of the slider 44 causes the crossbar 45 to move. At the same time, the movement of the crossbar 45 will compress the fixed spring 43. The movement of the crossbar 45 will separate it from the positioning component. At this time, the user can disassemble the bottom shell 5 and the top shell 6. Then, the bottom shell 5 or the top shell 6 can be positioned by the positioning component. After that, the pull rods 46 are released. At this time, the pull rods 46 will return to their original position under the influence of the spring force 43 of the fixed spring. At this time, the crossbar 45 will contact the positioning component again, and the bottom shell 5 or the top shell 6 can be fixed.

[0036] Furthermore, the drive assembly includes two connecting pipes 51, two driving rods 52, two driving push plates 53, two driven push plates 54, and two return springs 55. Both connecting pipes 51 are fixedly connected to the protective shell 2, with one end extending into the inner side of the protective shell 2 and the other end inclined. One end of each of the two driving rods 52 is fixedly connected to two moving plates 11, and the other end is fixedly connected to two driving push plates 53. The two driving push plates 53 and two driven push plates 54 are slidably connected within the two connecting pipes 51. The two driven push plates 54 are respectively connected to two driven push plates 55. The rod 12 is fixedly connected, and hydraulic oil is filled between the two driven push plates 54. One end of each of the two return springs 55 is fixedly connected to the two moving plates 11, and the other end of each of the two return springs 55 is fixedly connected to the two connecting pipes 51. The moving plates 11 can be moved by the die-casting assembly. The movement of the moving plates 11 will squeeze the two return springs 55 and drive the two active push plates 53 to move through the two active rods 52. The movement of the two active push plates 53 will transmit the pressure to the two driven push plates 54 through the hydraulic oil. At this time, the two driven push plates 54 will drive the two driven rods 12 to extend, and the cleaning assembly will be pushed out to start working.

[0037] Furthermore, the cleaning assembly includes a switch 61, a guide rod 62, an air pump 63, a delivery pipe 64, an air pipe 65, and several air nozzles 66. The switch 61 is located on the top of the inner side of the protective shell 2. The guide rod 62 is fixedly connected to the top of the moving plate 11. The air pump 63 is located on the top of the protective shell 2. One end of the delivery pipe 64 is connected to the air pump 63, and the other end of the delivery pipe 64 is connected to the air pipe 65. The air pipe 65 is mounted on two driven rods 12. Each air nozzle 66 is fixedly connected to the air pipe 65, and each air nozzle 66 is distributed facing the lower mold 3. Each air nozzle 66 is distributed on the side of the air pipe 65 away from the delivery pipe 64. The switch 61 is electrically connected to the air pump 63. When the drive component moves, the guide rod 62 will be driven to move together. Then, with the cooperation of the drive component, the air pipe 65 will be pushed out. When the air pipe 65 is pushed out to the maximum position, the guide rod 62 will also contact the switch 61. At this time, the air pump 63 will work and deliver compressed air to the air pipe 65 through the delivery pipe 64. Then, it will be sprayed out through the air nozzle 66 on the outside of the air pipe 65. At this time, the lower mold 3 can be cleaned.

[0038] Working principle: First, molten metal is filled into the lower mold 3. Then, two hydraulic cylinders 21 drive the pressure plate 23 to move via the limit rod 24. The movement of the pressure plate 23 drives the upper mold 4 and the top shell 6 to move. The upper mold 4 then contacts the lower mold 3, thus die-casting the workpiece. The top shell 6 engages with the bottom shell 5, which avoids the problem of molten metal splashing due to overheating during die-casting. When the bottom shell 5 or the top shell 6 needs to be replaced, the pull rod 46 can be pulled. The movement of the pull rod 46 drives the slider 44 to slide on the fixed rod 42. The movement of the slider 44 drives the crossbar 45 to move. At the same time, the movement of the crossbar 45 will compress the fixed spring 43. The crossbar 45 will slide out of the groove 33 on the positioning strip 32. At this time, the positioning strip 32 is no longer fixed. The user can then disassemble the bottom shell 5 and the top shell 6, and then insert the positioning strip 32 on the new bottom shell 5 or top shell 6 into the positioning hole 31. Then, the pull rod 46 is released. At this time, the pull rod 46 will engage with the fixed spring. Under the influence of the elastic force, the crossbar 45 returns to its original position and slides back into the groove 33. At this time, the bottom shell 5 or the top shell 6 can be fixed again. Before filling the lower mold 3 with molten metal, the pressure plate 23 can be moved upward by the hydraulic cylinder 21. The movement of the pressure plate 23 drives the moving plate 11 and the guide rod 62 to move. The movement of the moving plate 11 will squeeze the two return springs 55 and drive the two active push plates 53 to move through the two active rods 52. The movement of the two active push plates 53 transmits the pressure to the two driven push plates 54 through the hydraulic oil. At this time, the two driven push plates 54 will drive the two driven rods 12 to extend. At this time, the air pipe 65 is pushed out. When the guide rod 62 on the moving plate 11 moves to the position of contacting the switch 61, the air pipe 65 will be extended to the maximum position. At the same time, the air pump 63 works. The air pump 63 delivers compressed air to the air pipe 65 through the delivery pipe 64 and then sprays it out through the air nozzle 66 on the outside of the air pipe 65. At this time, the lower mold 3 can be cleaned.

[0039] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A die-casting apparatus for metal parts with a protective structure, comprising a processing table (1), a protective shell (2) disposed on the processing table (1), a lower mold (3) disposed on the processing table (1), an upper mold (4) disposed inside the protective shell (2), a bottom shell (5) sleeved on the outer side of the lower mold (3), and a top shell (6) sleeved on the outer side of the upper mold (4), wherein the bottom shell (5) and the top shell (6) are respectively provided with through holes adapted to the dimensions of the lower mold (3) and the upper mold (4), and the dimensions of the bottom shell (5) are adapted to the top shell (6), characterized in that: The processing table (1) is provided with a fixing mechanism, and the protective shell (2) is provided with a processing mechanism. The fixing mechanism consists of a positioning component and a fixing component, and the processing mechanism consists of a die-casting component, a linkage component and a cleaning component. The linkage assembly includes two movable plates (11), two driven rods (12), and a drive assembly. The two movable plates (11) and the two driven rods (12) are all connected to the drive assembly, and the positions of the two movable plates (11) correspond to the die-casting assembly.

2. The die-casting forming device for metal parts with a protective structure according to claim 1, characterized in that: The die-casting assembly includes a pressure plate (23), two hydraulic cylinders (21), two limiting holes (22), and two limiting rods (24). The two hydraulic cylinders (21) are fixedly connected to the protective shell (2), and the output shafts of the two hydraulic cylinders (21) pass through the protective shell (2) and are fixedly connected to the top surface of the pressure plate (23). The upper mold (4) is fixedly connected to the bottom surface of the pressure plate (23). The two limiting rods (24) are respectively fixedly connected to the inner side of the two limiting holes (22), and the two limiting rods (24) are slidably connected to the pressure plate (23). The two limiting holes (22) are respectively opened at both ends of the protective shell (2), and the positions of the two limiting holes (22) are corresponding.

3. A die-casting apparatus for metal parts with a protective structure according to claim 1 or 2, characterized in that: The positioning component includes positioning holes (31), positioning strips (32), and sliding grooves (33). There are two sets of positioning holes (31), positioning strips (32), and sliding grooves (33), and each set has two positioning holes (31). The two sets of positioning holes (31) are respectively opened on the processing table (1) and the pressure plate (23), and the two sets of positioning holes (31) pass through the processing table (1) and the pressure plate (23). The two sets of positioning strips (32) are respectively inserted into the two sets of positioning holes (31), and the two sets of positioning strips (32) are respectively fixedly connected to the bottom shell (5) and the top shell (6). The two sets of sliding grooves (33) are respectively opened on the two sets of positioning strips (32), and the openings of the two sets of sliding grooves (33) face the drive component.

4. The die-casting apparatus for metal parts with a protective structure according to claim 3, characterized in that: The fixing assembly includes a groove (41), a fixing rod (42), a fixing spring (43), a slider (44), a crossbar (45), and a pull rod (46). There are two of each of the grooves (41), fixing rods (42), fixing springs (43), sliders (44), and pull rods (46). The number of crossbars (45) is the same as that of the slide groove (33). The two grooves (41) are respectively opened on the pressure plate (23) and the processing table (1), and the two grooves (41) are respectively distributed on the pressure plate (23) and the processing table (1). The top and bottom surfaces of the grooves are respectively fixedly connected to the inner sides of the two grooves (41), the two sliders (44) are respectively slidably connected to the two fixed rods (42), the two sets of crossbars (45) are respectively fixedly connected to the two sliders (44), and the two crossbars (45) in each set are spaced apart. The two sets of crossbars (45) are respectively slidably connected to the inner sides of the two sets of sliding grooves (33), and the two pull rods (46) are respectively fixedly connected to one of the crossbars (45) in the two sets of crossbars (45).

5. The die-casting apparatus for metal parts with a protective structure according to claim 1, characterized in that: The drive assembly includes two connecting pipes (51), two driving rods (52), two driving push plates (53), two driven push plates (54), and two return springs (55). The two connecting pipes (51) are fixedly connected to the protective shell (2), with one end extending into the inner side of the protective shell (2) and the other end inclined. One end of each of the two driving rods (52) is fixedly connected to one of the two moving plates (11), and the other end of each driving rod (52) is fixedly connected to the other end of the moving plate (11). The ends are respectively fixedly connected to two active push plates (53), the two active push plates (53) and the two driven push plates (54) are respectively slidably connected in two connecting pipes (51), the two driven push plates (54) are respectively fixedly connected to two driven rods (12), and hydraulic oil is filled between the two driven push plates (54). One end of the two return springs (55) is respectively fixedly connected to two moving plates (11), and the other end of the two return springs (55) is respectively fixedly connected to two connecting pipes (51).

6. The die-casting apparatus for metal parts with a protective structure according to claim 1, characterized in that: The cleaning assembly includes a switch (61), a guide rod (62), an air pump (63), a delivery pipe (64), an air pipe (65), and several air nozzles (66). The switch (61) is located on the top of the inner side of the protective shell (2). The guide rod (62) is fixedly connected to the top of the moving plate (11). The air pump (63) is located on the top of the protective shell (2). One end of the delivery pipe (64) is connected to the air pump (63), and the other end of the delivery pipe (64) is connected to the air pipe (65). The air pipe (65) is mounted on two driven rods (12). Each air nozzle (66) is fixedly connected to the air pipe (65), and each air nozzle (66) is distributed towards the lower mold (3). Each air nozzle (66) is distributed on the side of the air pipe (65) away from the delivery pipe (64). The switch (61) is electrically connected to the air pump (63).

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