Die casting equipment for machining mechanical metal part

Abstract

The invention discloses die-casting equipment for mechanical metal part machining, and relates to the technical field of metal part machining, the die-casting equipment comprises a base, a hydraulic rod is fixedly connected to the side of the base, a movable die is fixedly connected to the output end of the hydraulic rod, and a fixed die matched with the movable die is further fixedly connected to the upper portion of the equipment; and meanwhile, a through opening used for injecting molten metal is formed in the upper portion of the fixed mold, a water tank is fixedly connected to the outer side of the fixed mold, and a working cavity is formed in the fixed mold. According to the die-casting equipment for mechanical metal part machining, when a jacking plate body moves outwards, a linkage rod drives a first push plate to move outwards in a first connecting box, gas in the first connecting box is sucked to form negative pressure, and the negative pressure enables gas in a second connecting box to be sucked into the first connecting box through a connecting hose; the second push plate drives the mold moving rod to move out of the fixed mold towards the inner side under negative pressure, the contact area of the inner wall of the fixed mold and the workpiece is reduced, the mold moving rod is separated from jacking cooperation with the jacking rod, and the workpiece demolding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of metal part processing, in particular to a die casting equipment for mechanical metal part processing. BACKGROUND

[0002] The die casting process in mechanical metal part processing is an efficient and precise forming technology, which is widely used in the fields of automobiles, electronics, home appliances, aerospace, etc. Die casting is a process of injecting molten metal (such as aluminum alloy, zinc alloy, magnesium alloy, copper alloy, etc.) into a metal mold cavity under high pressure and rapidly solidifying under high pressure.

[0003] The prior art one (Chinese patent with publication number CN213645829U and publication date of 2021-07-09) is a high-precision die casting mold for mechanical metal accessory production, which comprises a base and a positioning column. The bottom of the base is fixedly connected with an anti-skid pad, and the top of the base is welded with a lower mold. The positioning column is located in the inside of the lower mold, and the top of the positioning column is fixedly connected with a forming groove. The inside of the forming groove is welded with a clamping groove, and the front end of the clamping groove is movably connected with a clamping block. The left side of the clamping block is fixedly connected with a supporting block, and the rear end of the supporting block is fixedly connected with a scale. The right side of the forming groove is fixedly connected with a groove, and the inside of the groove is fixedly connected with a positioning block. The top of the lower mold is fixedly connected with a guide groove, and the inside of the guide groove is movably connected with a guide column. The device can well adjust the range of the forming groove, and has simple structure and high precision, so that the user can process parts of different sizes according to needs. The prior art two (Chinese patent with publication number CN216705900U and publication date of 2022-06-10) is a die casting equipment for metal clothing material processing, and the technical solution points are as follows: a discharging device is used to take down the metal clothing material after die casting on the movable mold. The discharging device comprises a clamping mechanism for clamping the metal clothing material after die casting and a driving mechanism for driving the clamping mechanism to reciprocally move towards or away from the movable mold. The driving mechanism comprises a mounting seat, a supporting seat and a second driving member for driving the mounting seat to reciprocally slide on the supporting seat towards or away from the movable mold. The clamping mechanism is installed on the mounting seat, which has the effect of eliminating the safety hazards existing when the workers take down the metal clothing material after die casting from the movable mold.

[0004] Although the prior art can well adjust the range of the forming groove and eliminate safety hazards, the demolding step is relatively complicated when the processed workpiece is demolded. When demolding, it can only adopt a single demolding method, which may cause incomplete demolding and damage to the workpiece.

[0005] Therefore, the mechanical metal part processing die casting equipment is provided to solve the problems in the prior art. SUMMARY

[0006] The mechanical metal part processing die casting equipment is provided to solve the problems in the prior art.

[0007] To achieve the above object, the present application provides the following technical scheme: a mechanical metal part processing die casting equipment, comprising a base, a hydraulic rod fixedly connected to the side of the base, an output end of the hydraulic rod fixedly connected with a movable die, and a fixed die fixedly connected above the equipment and matched with the movable die, a through hole for injecting molten metal arranged above the fixed die, a water tank fixedly connected to the outside of the fixed die, a working cavity formed in the inside of the fixed die, a serpentine cooling pipe fixedly connected in the inside of the working cavity and communicated with the water tank, a butt joint groove formed in the butt joint side of the fixed die, a jacking mechanism arranged between the inside of the butt joint groove and the working cavity, the jacking mechanism achieving jacking operation of the processed part by moving out of the movable die and supplying water in the serpentine cooling pipe, a moving die rod slidingly connected to the inside of the fixed die, and a demolding mechanism arranged between the inside of the moving die rod and the working cavity, the demolding mechanism driven to separate from the fixed die by moving out of the jacking mechanism.

[0008] Preferably, the butt joint side of the movable die is fixedly connected with a butt joint rod matched with the position of the butt joint groove, a sliding groove is formed in the lower side of the butt joint groove, and the sliding groove is communicated with the working cavity, and the butt joint groove is centrally symmetrically arranged with two groups of center points about the center of the movable die.

[0009] Preferably, the jacking mechanism comprises a fixed plate fixedly connected in the inside of the butt joint groove, a sliding rod slidingly penetrating through the center of the fixed plate, an outer connecting plate fixedly connected to the outer end of the sliding rod, and a fixed plate fixedly connected to the inner end of the sliding rod.

[0010] Preferably, one output port of the serpentine cooling pipe is communicated to the inside of the butt joint groove, the inner connecting plate is driven to slide outward along the fixed plate under the extrusion of the water body output by the serpentine cooling pipe, and the inner end of the butt joint rod is fitted with the outer side of the outer connecting plate when the movable die is assembled with the fixed die.

[0011] Preferably, the lower surface of the inner connecting plate is fixedly connected with an adjusting frame slidingly connected in the inside of the sliding groove, the end side of the adjusting frame is arranged in the inside of the working cavity, the end side of the adjusting frame is fixedly connected with a jacking plate body, and two groups of jacking plate bodies are arranged above and below along the end side of the adjusting frame.

[0012] Preferably, lifting rods are arranged at equal intervals on the inner side of the lifting plate body, and the lifting rods are slidably arranged on the fixed mold, and when the movable mold and the fixed mold are in the clamped state, the end side of the lifting rod is flush with the inner wall of the fixed mold, and when the movable mold and the fixed mold are not clamped, the lifting rods and the fixed mold form a sliding structure, and the end of the lifting rod extends out of the inner wall of the fixed mold.

[0013] Preferably, the demoulding mechanism includes a second connecting box, which is fixedly connected to the inner side of the fixed mold, and a second push plate is slidably connected to the interior of the second connecting box, and the mold moving rods are fixedly connected to the inner side of the second push plate at equal intervals.

[0014] Preferably, the inner side of the fixed mold is also fixedly connected to a first connecting box, and the interior of the first connecting box is slidably connected to a first push plate, and the inner side of the first push plate is fixedly connected to a linkage rod, and the linkage rod slides through the side of the first connecting box, and the outer end of the linkage rod is fixedly connected to the side of the lifting plate body.

[0015] Preferably, a connecting hose is provided between the bottom of the first connecting box and the side of the second connecting box. When the lifting plate moves outward, the mold shifting rod slides to the inside of the second connecting box. When the lifting rod is not in the lifting state, the end side of the mold shifting rod is flush with the inner wall of the fixed mold.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The movable mold is moved by the driving action of the hydraulic rod and thus assembled with the fixed mold. When the two are assembled with each other, the docking rod is docked to the inside of the docking groove. The mutual cooperation between the docking groove and the docking rod can ensure the stability of the docking between the movable mold and the fixed mold, and avoid dislocation between the fixed mold and the movable mold during mold closing, thereby affecting the subsequent workpiece molding quality.

[0017] After the workpiece is processed, the pump inside the water tank can be started. At this time, the water in the water tank can circulate through the serpentine cooling pipe. The serpentine cooling pipe increases contact with the workpiece. The water absorbs the heat of the workpiece and conducts heat to accelerate the cooling of the workpiece, which is convenient for subsequent demolding.

[0018] When the movable mold and the fixed mold are closed, the docking rod hits the outer connecting plate limit, and the serpentine cooling pipe supplies cooling water that cannot push the outer connecting plate. During demoulding, the movable mold drives the docking rod to move outward, and the serpentine cooling pipe still supplies cooling water, part of which flows into the docking groove to push the inner connecting plate, causing it to drive the sliding rod to slide outward along the fixed plate, and synchronously drive the outer connecting plate to move outward. At this time, the adjusting frame moves outward, causing the lifting plate body to drive the lifting rod to move outward, and the lifting rod extends outward from the inner wall of the fixed mold to lift the workpiece, assisting in demoulding and improving efficiency.

[0019] When the lifting plate moves outward, the linkage rod drives the first push plate to move outward along the first connecting box, sucking the gas in the first connecting box to form a negative pressure. The negative pressure causes the gas in the second connecting box to be sucked into the first connecting box through the connecting hose. Under the negative pressure, the second push plate drives the mold moving rod to move inward out of the fixed mold, reducing the contact area between the inner wall of the fixed mold and the workpiece. The mold moving rod is disengaged from the lifting rod to improve the demoulding efficiency of the workpiece.

[0020] When the movable mold and the fixed mold are in the clamped state, the ends of the lifting rod and the shifting rod are flush with the inner wall of the fixed mold, which can provide a flat, stable and undisturbed cavity environment for workpiece molding. The molten material can fill the mold cavity evenly and smoothly, effectively avoiding problems such as material flow obstruction and uneven filling caused by protrusions or depressions on the ends of the rods, thereby ensuring that the workpiece can be molded stably without quality defects such as molding jams. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention in a mold closing state; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention in an un-molded state; Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the fixed mold of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the working chamber of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the serpentine cooling pipe of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the lifting rod when the mold is not closed; Figure 8 This is a schematic diagram of the three-dimensional structure of the jacking plate of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the first connection box of the mold clamping of the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure of the first connection box of the present invention when the mold is not closed; Figure 11 This is a schematic diagram of a three-dimensional cross-sectional structure of the first connection box of the mold clamping of the present invention; Figure 12 It is a schematic diagram of the three-dimensional cross-sectional structure of the second connection box of the present invention without mold clamping.

[0022] In the figure: 1. Base; 2. Hydraulic rod; 3. Moving mold; 4. Fixed mold; 5. Water tank; 6. Docking rod; 7. Docking groove; 8. Serpentine cooling pipe; 9. Adjustment frame; 10. Slide groove; 11. Fixed plate; 12. Inner connecting plate; 13. Outer connecting plate; 14. Slide rod; 15. Connecting hose; 16. First connecting box; 17. Second connecting box; 18. Lifting rod; 19. Lifting plate body; 20. Linking rod; 21. First push plate; 22. Second push plate; 23. Die-shifting rod; 24. Working chamber. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Embodiment 1: In order to avoid the problem that the two sets of molds are misaligned during docking and thus affect the quality of subsequent workpiece molding, a docking groove 7 and a docking rod 6 are provided. Figure 1 - Figure 6 The technical solution shown in the figure, the present invention provides the following technical solution: a die-casting equipment for processing mechanical metal parts, disclosed: a hydraulic rod 2 is fixedly connected to the side of the base 1, and the output end of the hydraulic rod 2 is fixedly connected to the movable mold 3, and a fixed mold 4 adapted to the movable mold 3 is also fixedly connected to the top of the equipment, and a through-hole for injecting molten metal is provided above the fixed mold 4, and a docking rod 6 adapted to the position of the docking groove 7 is fixedly connected to the docking side of the movable mold 3, and a slide groove 10 is provided on the lower side of the docking groove 7, and the slide groove 10 is connected to the working chamber 24, and two groups of docking grooves 7 are symmetrically distributed about the center point of the movable mold 3.

[0025] In the mold assembly and clamping process, the movable mold 3 is precisely controlled by the hydraulic driving system, and is smoothly and powerfully driven by the hydraulic rod 2 to move along the predetermined trajectory, and then completes the assembly action with the fixed mold 4. When the movable mold 3 and the fixed mold 4 are close to each other for assembly, the butt joint rod 6 on the movable mold 3 is butt jointed to the corresponding butt joint groove 7 on the fixed mold 4. A high-precision positioning device is installed between the butt joint groove 7 and the butt joint rod 6, which can effectively ensure the stability of the movable mold 3 and the fixed mold 4 during the butt joint process, and can avoid the misalignment of the fixed mold 4 and the movable mold 3 in the key link of clamping, prevent the appearance of flash, burr on the surface of the workpiece, or the phenomenon that the size precision of the workpiece does not meet the design requirements. When the workpiece machining process is successfully completed, the pump body device in the water tank 5 can be started. Under the driving action of the pump body, the water stored in the water tank 5 will flow in an orderly manner along the predetermined path through the serpentine cooling pipe 8. The serpentine cooling pipe 8 increases the contact area and contact time with the molded workpiece due to its unique curved shape. During the water recirculation process, the water will fully absorb the large amount of heat emitted by the molded workpiece, and through the efficient heat conduction mechanism, the heat on the workpiece will be quickly transferred to the water. With the continuous loss of heat, the temperature of the workpiece is rapidly reduced, thereby effectively accelerating the cooling speed of the workpiece, creating good conditions for subsequent demolding process, and ensuring the stability and efficiency of the entire production process.

[0026] Example two: in order to solve the problem of difficult demolding of the molded workpiece, a jacking mechanism is provided, which can lift the molded workpiece, such as Figure 3 、 Figure 4 、 Figure 6 - Figure 8The technical scheme is shown, and the present application provides the following technical scheme: a die casting equipment for mechanical metal part processing, which discloses that the outer side of a fixed mold 4 is fixedly connected with a water tank 5, the inside of the fixed mold 4 is provided with a working cavity 24, the inside of the working cavity 24 is fixedly connected with a serpentine cooling pipe 8 which is connected with the water tank 5 in a through manner, the butt joint side of the fixed mold 4 is provided with a butt joint groove 7, and a jacking mechanism is arranged between the inside of the butt joint groove 7 and the working cavity 24, the jacking mechanism realizes the jacking operation of the processed part by moving the movable mold 3 out of the water body in the serpentine cooling pipe 8, the jacking mechanism comprises a fixed plate 11 which is fixedly connected to the inside of the butt joint groove 7, a sliding rod 14 which is slidably connected to the center of the fixed plate 11, an outer connecting plate 13 which is fixedly connected to the outer end of the sliding rod 14, and a fixed plate 11 which is fixedly connected to the inner end of the sliding rod 14, one output port of the serpentine cooling pipe 8 is communicated to the inside of the butt joint groove 7, the inner connecting plate 12 drives the sliding rod 14 to slide outward along the fixed plate 11 under the extrusion of the water body in the serpentine cooling pipe 8, the inner end of the butt joint rod 6 is attached to the outside of the outer connecting plate 13 when the movable mold 3 is assembled with the fixed mold 4, the lower surface of the inner connecting plate 12 is fixedly connected with an adjusting frame 9 which is slidably connected to the inside of a sliding groove 10, the end side of the adjusting frame 9 is arranged in the inside of the working cavity 24, the end side of the adjusting frame 9 is fixedly connected with a jacking plate body 19, and two groups of jacking plate bodies 19 are arranged above and below the end side of the adjusting frame 9, the inside of the jacking plate body 19 is arranged with jacking rods 18 at equal intervals, the jacking rods 18 are slidably arranged on the fixed mold 4, and the end side of the jacking rod 18 is flush with the inner wall of the fixed mold 4 when the movable mold 3 and the fixed mold 4 are in a mold closing state, the jacking rod 18 and the fixed mold 4 form a sliding structure when the movable mold 3 and the fixed mold 4 are not in the mold closing state, and the end of the jacking rod 18 extends out of the inner wall of the fixed mold 4.

[0027] When the movable mold 3 and the fixed mold 4 are in the closed mold state, the butt joint rod 6 will be in close contact with the outer connecting plate 13, thereby effectively limiting the outer connecting plate 13. In this state, the serpentine cooling pipe 8 continuously supplies cooling water, but due to the limiting block of the butt joint rod 6, the cooling water cannot generate enough force to push the outer connecting plate 13 to move outward. When the workpiece demolding operation is needed, the movable mold 3 starts to drive the butt joint rod 6 to move outward, at the same time, the serpentine cooling pipe 8 still maintains stable supply of cooling water. Under the action of the unique flow guide structure of the serpentine cooling pipe 8, part of the cooling water will flow into the butt joint groove 7. At this time, the cooling water generates a pushing and extruding effect on the inner connecting plate 12 by relying on its own pressure, so that the inner connecting plate 12 drives the sliding rod 14 to slide outward along the track set on the fixed plate 11. In the process of the sliding rod 14 sliding outward, the outer connecting plate 13 will be synchronously driven to move outward. Since the lower end of the outer connecting plate 13 is fixedly connected with the butt joint rod 6, the adjusting frame 9 will be synchronously driven to move outward. The lifting plate body 19 will also be synchronously driven to move outward under the driving of the adjusting frame 9, so that the lifting rod 18 is finally driven to move outward, and the end side of the lifting rod 18 extends out of the inner wall of the fixed mold 4 to apply an upward lifting force to the workpiece, thereby assisting the completion of the demolding operation of the workpiece and effectively improving the demolding efficiency.

[0028] Example three: in order to further improve the demolding efficiency, a demolding mechanism is arranged, which can cooperate with the lifting of the lifting rod 18 to improve the demolding efficiency of the workpiece, as shown in the technical scheme, Figure 5 、 Figure 9 - Figure 12 The present application provides the following technical scheme: a mechanical metal part machining die casting equipment discloses that the inner side of the fixed mold 4 is also slidably connected with a mold moving rod 23, and a demolding mechanism is arranged between the inner side of the mold moving rod 23 and the working cavity 24. The demolding mechanism drives the mold moving rod 23 to separate from the fixed mold 4 through the outward movement of the lifting mechanism. The demolding mechanism comprises a second connecting box 17, which is fixedly connected to the inner side of the fixed mold 4. The inner side of the second connecting box 17 is slidably connected with a second push plate 22. The mold moving rod 23 is fixedly connected to the inner side of the second push plate 22 at equal intervals. The inner side of the fixed mold 4 is also fixedly connected with a first connecting box 16. The inner side of the first connecting box 16 is slidably connected with a first push plate 21. The inner side of the first push plate 21 is fixedly connected with a linkage rod 20. The linkage rod 20 is slidably connected to the side of the first connecting box 16. The outer end of the linkage rod 20 is fixedly connected with the side of the lifting plate body 19. The bottom of the first connecting box 16 and the side of the second connecting box 17 are communicated with a connecting hose 15. When the lifting plate body 19 moves outward, the mold moving rod 23 slides into the second connecting box 17. When the lifting rod 18 is not in the lifting state, the end side of the mold moving rod 23 is flush with the inner wall of the fixed mold 4.

[0029] When the lifting plate body 19 moves outward under the driving of external force, it will establish a stable connection relationship with the first push plate 21 through the precisely designed linkage rod 20, and then synchronously drive the first push plate 21 to move outward along the preset track inside the first connecting box 16 stably. In the moving process of the first push plate 21, according to the principle of fluid mechanics, it will produce a suction effect on the gas inside the first connecting box 16, so that a negative pressure environment is formed inside the first connecting box 16. Since the first connecting box 16 and the second connecting box 17 are connected by the connecting hose 15 to realize the communication of the gas, under the driving of negative pressure, the gas inside the second connecting box 17 will be sucked into the first connecting box 16 along the connecting hose 15. At this time, the gas pressure inside the second connecting box 17 is reduced, and the second push plate 22 arranged will synchronously drive the mold moving rod 23 to move inward under the negative pressure effect of the gas pressure difference on both sides. After the mold moving rod 23 moves inward, it will be separated from the inside of the fixed mold 4, effectively reducing the contact area between the inner wall of the fixed mold 4 and the workpiece. The mold moving rod 23 cooperates with the lifting action of the lifting rod 18 after being separated from the inside of the fixed mold 4, simultaneously acting from two aspects of reducing contact resistance and providing upward lifting force, further optimizing the mechanical conditions of workpiece demolding, and significantly improving the work efficiency of workpiece demolding.

[0030] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A die-casting device for processing mechanical metal parts, comprising a base (1), a hydraulic rod (2) fixedly connected to the side of the base (1), and an output end of the hydraulic rod (2) fixedly connected to a movable die (3), and a fixed die (4) adapted to the movable die (3) fixedly connected to the top of the device, and a port for injecting molten metal is provided above the fixed die (4), characterized in that: The outer side of the fixed mold (4) is fixedly connected to a water tank (5), and a working chamber (24) is provided inside the fixed mold (4), and a serpentine cooling pipe (8) which is connected to the water tank (5) is fixedly connected inside the working chamber (24). A docking groove (7) is provided on the docking side of the fixed mold (4), and a lifting mechanism is provided between the inside of the docking groove (7) and the working chamber (24). The lifting mechanism realizes the lifting operation of the processing component by moving the movable mold (3) out and supplying water in the serpentine cooling pipe (8). The inner side of the fixed mold (4) is also slidably connected to a mold moving rod (23), and a demoulding mechanism is provided between the inner side of the mold moving rod (23) and the working chamber (24). The demoulding mechanism synchronously drives the mold moving rod (23) to separate from the fixed mold (4) through the outward movement of the lifting mechanism.

2. The die-casting equipment for machining mechanical metal parts according to claim 1, characterized in that: The docking side of the movable mold (3) is fixedly connected to a docking rod (6) that matches the position of the docking groove (7), and a slide groove (10) is provided on the lower side of the docking groove (7), and the slide groove (10) is connected to the working cavity (24). Two groups of the docking grooves (7) are centrally symmetrically distributed about the center point of the movable mold (3).

3. The die-casting equipment for machining mechanical metal parts according to claim 1, characterized in that: The lifting mechanism includes a fixed plate (11), the fixed plate (11) is fixedly connected to the inside of the docking groove (7), and a sliding rod (14) is slidably connected through the center of the fixed plate (11), and the outer end of the sliding rod (14) is fixedly connected to the outer connecting plate (13), and the inner end of the sliding rod (14) is fixedly connected to the fixed plate (11).

4. The die-casting equipment for machining mechanical metal parts according to claim 3, characterized in that: An output port of the serpentine cooling pipe (8) is connected to the inner side of the docking groove (7), and the inner connecting plate (12) drives the sliding rod (14) to slide outward along the fixed plate (11) under the squeezing effect of the water output from the serpentine cooling pipe (8). When the movable mold (3) and the fixed mold (4) are docked and assembled, the inner end of the docking rod (6) fits the outer side of the outer connecting plate (13).

5. The die-casting equipment for machining mechanical metal parts according to claim 4, characterized in that: The lower surface of the inner connecting plate (12) is fixedly connected to an adjusting frame (9), and the adjusting frame (9) is slidably connected to the inside of the slide groove (10), and the end side of the adjusting frame (9) is extended and arranged inside the working chamber (24), and the end side of the adjusting frame (9) is fixedly connected to a lifting plate body (19), and two groups of lifting plate bodies (19) are arranged up and down along the end side of the adjusting frame (9).

6. The die-casting equipment for machining mechanical metal parts according to claim 5, characterized in that: Lifting rods (18) are arranged at equal intervals on the inner side of the lifting plate (19), and the lifting rods (18) are slidably arranged on the fixed mold (4), and when the movable mold (3) and the fixed mold (4) are in the mold-closing state, the end side of the lifting rod (18) is flush with the inner wall of the fixed mold (4); when the movable mold (3) and the fixed mold (4) are not in the mold-closing state, the lifting rods (18) and the fixed mold (4) form a sliding structure, and the end of the lifting rod (18) extends out of the inner wall of the fixed mold (4).

7. The die-casting equipment for machining mechanical metal parts according to claim 6, characterized in that: The demoulding mechanism includes a second connecting box (17), the second connecting box (17) is fixedly connected to the inner side of the fixed mold (4), and the interior of the second connecting box (17) is slidably connected to a second push plate (22), and the mold moving rods (23) are fixedly connected to the inner side of the second push plate (22) at equal intervals.

8. The die-casting equipment for machining mechanical metal parts according to claim 7, characterized in that: The fixed mold (4) is also fixedly connected to the inner side of the first connecting box (16), and the first push plate (21) is slidably connected to the inside of the first connecting box (16), and the inner side of the first push plate (21) is fixedly connected to the linkage rod (20), and the linkage rod (20) slides through and is connected to the side of the first connecting box (16), and at the same time, the outer end of the linkage rod (20) is fixedly connected to the side of the lifting plate body (19).

9. The die-casting equipment for machining mechanical metal parts according to claim 8, characterized in that: A connecting hose (15) is provided between the bottom of the first connecting box (16) and the side of the second connecting box (17); when the lifting plate (19) moves outward, the mold shifting rod (23) slides into the interior of the second connecting box (17); when the lifting rod (18) is not in the lifting state, the end side of the mold shifting rod (23) is flush with the inner wall of the fixed mold (4).

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