An automatic die casting mold assembly for metal structural part production

Abstract

The application discloses an automatic die-casting die assembly for metal structural part production and particularly relates to the metal casting manufacturing field, which comprises an upper die seat and a lower die seat, the top of the upper die seat is fixedly connected with a die handle, the bottom of the upper die seat is fixedly connected with a male die fixing plate, the male die fixing plate and the upper die seat are fixedly connected with a male die body, the male die body is divided into a plurality of independent temperature control unit areas along the working profile thereof, a temperature guide cavity is formed in each temperature control unit area, a heating coil is arranged in the temperature guide cavity, and a cooling flow channel is in communication with an external cooling medium circulation system. The application divides the male die body into a plurality of independent temperature control unit areas according to the working profile, integrates the heating coil, the cooling flow channel and the temperature sensor in each area, and cooperates with a pouring system formed by one primary pouring opening and a plurality of secondary pouring openings, so that the step-variable filling from the center to the edge and from the thick wall to the thin wall is realized, and the internal quality and the appearance qualification rate of the casting are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of metal casting manufacturing technology, and more specifically, to an automated die casting mold assembly for the production of metal structural parts. Background Technology

[0002] Die casting is a highly efficient and precise metal forming process that is widely used in the production of metal structural parts in the automotive, aerospace, and wind turbine blade industries. As the core equipment of this process, the performance of die casting mold components directly affects the forming quality, production efficiency, and mold life. Traditional die casting molds usually adopt an integral structure and complete the filling and solidification of molten metal through a single gating system and simple temperature control.

[0003] In the die-casting production of large thin-walled metal structural components, the long filling process of molten metal within the huge cavity, rapid heat dissipation, and extremely uneven distribution make it easy for the temperature of the molten metal to drop rapidly as it flows through distant or thin-walled areas, significantly reducing its fluidity. This can easily lead to insufficient filling in these areas, resulting in appearance defects such as cold shuts and undercasting. Meanwhile, near the gate or in thick-walled areas, the molten metal comes into contact with the cavity first and the heat is highly concentrated, resulting in a relatively slow cooling rate. During solidification, insufficient feeding can easily lead to internal structural defects such as shrinkage cavities and porosity, severely weakening the mechanical properties of the structural components. More importantly, this uneven temperature field distributed along the cavity can induce complex and severe thermal stresses inside the casting. When the thermal stress exceeds the yield strength of the material at the corresponding temperature, the casting warps and deforms immediately after demolding, exceeding dimensional tolerances and causing a large number of products to be scrapped. In addition, the periodic action of thermal stress can be transmitted to the molded parts through the mold, accelerating mold fatigue damage and further shortening mold life, seriously affecting the stability and yield rate of die-casting production of large thin-walled metal structural components.

[0004] In summary, to achieve high-quality die casting of large thin-walled metal structural parts, it is necessary to address the problems of insufficient filling in the far-end thin-walled areas, shrinkage cavities and porosity in the thick-walled areas near the gate, and warping deformation caused by thermal stress due to uneven temperature field in the large cavity of the molten metal. This is because the molten metal has a long filling flow and uniform heat distribution during the die casting process, thereby improving the casting quality and mold life. Summary of the Invention

[0005] The present invention provides an automated die-casting mold assembly for the production of metal structural parts, which aims to solve the following problems: insufficient filling of the thin-walled area at the far end, shrinkage and porosity of the thick-walled area near the gate, and warping deformation of the casting caused by thermal stress induced by the uneven temperature field due to the long filling process of molten metal in a huge cavity and rapid and uneven heat dissipation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automated die-casting mold assembly for the production of metal structural parts, comprising an upper mold base and a lower mold base, a mold shank fixedly connected to the top of the upper mold base, a punch fixing plate fixedly connected to the bottom of the upper mold base, a punch body fixedly connected between the punch fixing plate and the upper mold base, the punch body being divided into multiple independent temperature control unit areas along its working surface, each temperature control unit area having a temperature conducting cavity, a heating coil installed in the temperature conducting cavity, and a cooling channel connected to an external cooling medium circulation system. The punch body is equipped with a casting pipe. The outlet end of the casting pipe is fixedly connected to a main casting port and multiple secondary casting ports. A bottom guide groove is opened at the bottom of the punch body, and multiple side guide grooves are opened around the punch body. The main casting port is located in the bottom guide groove, and the multiple secondary casting ports are respectively located in the multiple side guide grooves. A die is fixedly connected to the lower die base. A cooling pipe is fixedly connected inside the die. Multiple temperature sensors are fixedly connected to the inner wall of the die. The temperature sensors are used to detect the temperature of each temperature control unit area in real time.

[0007] In a preferred embodiment, a plurality of positioning rods are fixedly connected to the punch fixing plate, a pressure plate ring is slidably connected to the positioning rod, a pressure spring is fixedly connected between the pressure plate ring and the punch fixing plate, and a plurality of positioning holes are provided on the die, the positioning holes and the positioning rods are slidably connected.

[0008] In a preferred embodiment, the multiple temperature-conducting cavities opened in the punch body are arranged in a ring array, the cross-section of the temperature-conducting cavities is rectangular, and the power density of the heating coil is not less than 15W / cm³.

[0009] In a preferred embodiment, a plurality of hexagonal mounting cavities are provided on one side of the die. The mounting cavities are provided with anti-error protrusions and multi-functional interfaces, and plug-in modules are slidably connected within the mounting cavities.

[0010] In a preferred embodiment, a plurality of fixing rods are fixedly connected to the die cavity, with two fixing rods forming a group. A group of fixing rods is provided around each mounting cavity, and springs are rotatably connected to the fixing rods.

[0011] In a preferred embodiment, a plurality of stress relief modules are installed inside the die. Each stress relief module includes a miniature piezoelectric actuator fixedly connected inside the die, a guide rod fixedly connected to the die, and a slider slidably connected to the guide rod. The miniature piezoelectric actuator is used to drive the slider to slide along the guide rod.

[0012] In a preferred embodiment, the diameter of the cooling pipe is 4mm-8mm, a main liquid delivery pipe is fixedly connected inside the die, multiple liquid delivery branch pipes are fixedly connected to the main liquid delivery pipe, and multiple atomizing nozzles are fixedly connected to the liquid delivery branch pipes, with the atomizing nozzles spraying in the direction of the punch body.

[0013] In a preferred embodiment, a lifting plate is slidably connected inside the lower mold base. The lifting plate is provided with a liquid storage chamber and multiple movable chambers. A flow valve is installed between the movable chambers and the liquid storage chamber. A top column is slidably connected inside the movable chamber. The diameter of the top column is 10mm-20mm.

[0014] In a preferred embodiment, a pressure sensor is fixedly connected to the top column. The pressure sensor is used to detect the contact pressure between the top column and the product in real time. The pressure sensor has a range of 0N-5000N and an accuracy of not less than 0.5%FS.

[0015] The beneficial effects of this invention are as follows: 1. This invention divides the punch body into multiple independent temperature control unit areas according to the working surface, and integrates heating coils, cooling channels and temperature sensors in each area. It can independently and quickly preheat and compensate for heat dissipation in different areas such as the near gate area, thick-walled area and thin-walled area, thereby controlling the temperature difference of the working surface of the mold within the allowable range of the process. With the gating system consisting of "one main gating gate and multiple secondary gating gates", and the high-speed thermal response valve built into the gating gate that can be dynamically adjusted, the filling sequence and speed of the molten metal can be adjusted in real time according to the feedback of the temperature sensor. It can realize graded variable speed filling from the center to the edge and from the thick wall to the thin wall, effectively solving the problem of insufficient filling in the far thin-walled area and insufficient feeding in the near gate thick-walled area caused by uneven heat loss in traditional die casting, and significantly improving the internal quality and appearance qualification rate of the casting.

[0016] 2. By integrating a stress relief module into the stress concentration area of ​​the die, this invention can effectively alleviate the alternating thermomechanical stress caused by drastic and uneven temperature changes during the die casting process, suppress the initiation and propagation of thermal fatigue cracks, and significantly improve the reliability and service life of the die under complex working conditions.

[0017] 3. The present invention provides an ejection system consisting of a lifting plate, a liquid storage chamber, a movable chamber, a flow valve, and an ejector column in the lower mold base, and integrates a high-precision pressure sensor at the end of the ejector column. This ensures that large thin-walled castings can smoothly detach from the mold cavity with uniform and minimal separation force under huge clamping force, effectively avoiding plastic deformation, tearing, or scrapping of the castings caused by uneven ejection force.

[0018] 4. This invention designs multiple standardized hexagonal mounting cavities on one side of the die. Each mounting cavity is equipped with an anti-error protrusion and a multi-functional interface, and is equipped with a sliding plug-in module and a spring mechanism for locking. This design allows the electronic components of subsystems such as temperature control, sensing, and drive to be highly integrated into individual plug-in modules. This not only simplifies the complex wiring and assembly inside the mold and reduces the difficulty of system integration, but also greatly shortens the fault location and repair time, and improves the availability and maintenance efficiency of the production line.

[0019] 5. This invention integrates a release agent spraying system consisting of a main infusion pipeline, infusion branch pipelines, and multiple atomizing nozzles within the mold cavity. Compared to external spraying, this method can better cover complex cavities and dead corners, and the spraying is uniform and consistent. This saves on the amount of release agent used, avoids poor demolding or surface defects of castings caused by uneven coating, and prevents the release agent from contaminating other precision components inside the mold. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the upper mold base structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the pressure plate ring structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the punch body structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the heating coil structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the lower mold base structure of the present invention.

[0027] Figure 8 This is a schematic diagram of the mounting cavity structure of the present invention.

[0028] Figure 9 This is a schematic diagram of the reed structure of the present invention.

[0029] Figure 10 This is a schematic diagram of the micro piezoelectric actuator of the present invention.

[0030] Figure 11 This is a schematic diagram of the cooling pipe structure of the present invention.

[0031] Figure 12 This is a schematic diagram of the lifting plate structure of the present invention.

[0032] The attached diagram is labeled as follows: 1. Upper mold base; 2. Lower mold base; 3. Mold handle; 4. Punch fixing plate; 5. Punch body; 501. Bottom guide channel; 502. Side guide channel; 503. Temperature guiding cavity; 6. Positioning rod; 7. Pressure plate ring; 8. Pressure edge spring; 9. Casting pipe; 10. Main casting port; 11. Secondary casting port; 12. Heating coil; 13. Die; 1301. Positioning hole; 1302. Mounting cavity; 13021. Error prevention. 13022, Multifunctional Interface; 14, Plug-in Module; 15, Fixing Rod; 16, Spring; 17, Miniature Piezoelectric Actuator; 18, Guide Rod; 19, Slider; 20, Cooling Pipe; 21, Main Infusion Pipe; 22, Infusion Branch Pipe; 23, Atomizing Nozzle; 24, Lifting Plate; 2401, Liquid Storage Chamber; 2402, Movable Chamber; 25, Flow Valve; 26, Top Column; 27, Pressure Sensor; 28, Temperature Sensor. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] Refer to the instruction manual appendix Figures 1 to 12 An automated die-casting mold assembly for producing metal structural parts includes an upper mold base 1 and a lower mold base 2. A mold shank 3 is fixedly connected to the top of the upper mold base 1, and a punch fixing plate 4 is fixedly connected to the bottom of the upper mold base 1. A punch body 5 is fixedly connected between the punch fixing plate 4 and the upper mold base 1. The punch body 5 is divided into multiple independent temperature control unit areas along its working surface. Each temperature control unit area has a temperature conducting cavity 503. A heating coil 12 is installed in the temperature conducting cavity 503. The cooling channel is connected to an external cooling medium circulation system. A casting pipe 9 is installed inside the punch body 5. The liquid outlet is fixedly connected to a main pouring port 10 and multiple secondary pouring ports 11. The bottom of the punch body 5 is provided with a bottom guide groove 501, and multiple side guide grooves 502 are provided around the punch body 5. The main pouring port 10 is located in the bottom guide groove 501, and the multiple secondary pouring ports 11 are respectively located in the multiple side guide grooves 502. A die 13 is fixedly connected to the lower mold base 2. A cooling pipe 20 is fixedly connected inside the die 13. Multiple temperature sensors 28 are fixedly connected to the inner wall of the die 13. The temperature sensors 28 are used to detect the temperature of each temperature control unit area in real time.

[0035] It should be noted that multiple independent temperature control unit areas are arranged sequentially from bottom to top along the working surface of the punch body 5, respectively corresponding to the near-gate area, thick-walled area, and thin-walled area of ​​product forming. The heating coil 12 and the cooling channel work together to achieve precise compensation and heat dissipation of the temperature of different areas through independent zone control, ensuring that the temperature difference of each area is controlled within the preset process range during the forming process. The main pouring port 10 and multiple secondary pouring ports 11 are all equipped with high-speed thermal response valves. During die casting, the control system dynamically adjusts the opening and closing sequence and opening degree of each valve according to the temperature data of each temperature control unit area fed back in real time by the temperature sensor 28, so as to realize the graded and variable speed filling of the molten metal from the center to the edge and from the thick-walled area to the thin-walled area, thereby optimizing the filling flow and heat distribution. In this process, the temperature sensor 28 not only monitors the temperature, but its feedback signal also serves as a key input parameter for adjusting the action of each pouring port valve, so as to actively intervene and balance the changes in the fluidity of the molten metal caused by temperature differences.

[0036] Refer to the instruction manual appendix Figure 4 Multiple positioning rods 6 are fixedly connected to the punch fixing plate 4. A pressure plate ring 7 is slidably connected to the positioning rod 6. A pressure spring 8 is fixedly connected between the pressure plate ring 7 and the punch fixing plate 4. Multiple positioning holes 1301 are opened on the die 13. The positioning holes 1301 are slidably connected to the positioning rods 6.

[0037] It should be noted that the multiple positioning rods 6 fixedly connected to the punch fixing plate 4 are evenly distributed around the punch body 5. The pressure plate ring 7 is slidably sleeved on the positioning rods 6, and the pressure spring 8 connected between it and the punch fixing plate 4 is in a compressed state, which is used to apply a uniform pressure force to the blank when the mold is closed. The multiple positioning holes 1301 opened on the die 13 correspond one-to-one with the positioning rods 6 and slide to ensure the concentricity and alignment accuracy of the punch and die during the mold closing process, and prevent forming errors caused by offset.

[0038] Refer to the instruction manual appendix Figure 2 Multiple temperature-conducting cavities 503 are arranged in a ring array inside the punch body 5. The cross-section of the temperature-conducting cavity 503 is rectangular, and the power density of the heating coil 12 is not less than 15W / cm³.

[0039] It should be noted that the multiple temperature-conducting cavities 503 inside the punch body 5 are arranged in a ring array with a rectangular cross-section to maximize the internal installation space and heat exchange surface area. The heating coil 12 is installed inside the temperature-conducting cavity 503 with a power density of not less than 15W / cm³, ensuring that the working surface of the punch can be quickly heated to the preset temperature during the die-casting interval. In conjunction with the cooling channel, it can achieve rapid response and precise control of the temperature of each temperature control unit area.

[0040] Refer to the instruction manual appendix Figure 8The die 13 has multiple hexagonal mounting cavities 1302 on one side. The mounting cavity 1302 is provided with an anti-error protrusion 13021 and a multi-functional interface 13022. The mounting cavity 1302 is slidably connected with a plug-in module 14.

[0041] It should be noted that multiple mounting cavities 1302 are concentrated on the same side of the cavity mold 13 and arranged according to a predetermined rule. The multi-functional interface 13022 provided in each mounting cavity 1302 is a standardized interface. It works together with the error-proof protrusion 13021 to ensure that each plug-in module 14 can only be inserted into the corresponding position in the correct direction. The plug-in module 14 integrates an electronic component in the mold. When a certain electronic component is damaged, it is only necessary to disassemble and replace the corresponding plug-in module 14 to complete the repair without disassembling the entire mold.

[0042] Refer to the instruction manual appendix Figure 9 Multiple fixing rods 15 are fixedly connected to the die 13. Two fixing rods 15 form a group. A group of fixing rods 15 is provided around each mounting cavity 1302. Springs 16 are rotatably connected to the fixing rods 15.

[0043] It should be noted that the multiple fixing rods 15 fixedly connected to the die 13 are arranged in pairs on the periphery of each mounting cavity 1302. Each fixing rod 15 is rotatably connected to a spring 16. The spring 16 presses the inserted plug-in module 14 into the mounting cavity 1302 with its elastic force to prevent it from loosening in the die casting vibration environment. At the same time, it is easy to disassemble and replace by hand, improving the modular maintenance efficiency of the mold.

[0044] Refer to the instruction manual appendix Figure 10 Multiple stress relief modules are installed inside the die 13. Each stress relief module includes a miniature piezoelectric actuator 17 fixedly connected inside the die 13, a guide rod 18 fixedly connected to the die 13, and a slider 19 slidably connected to the guide rod 18. The miniature piezoelectric actuator 17 is used to drive the slider 19 to slide along the guide rod 18.

[0045] It should be noted that the micro piezoelectric actuator 17 integrates a stress detector, and the stress relief module is installed in the pre-set stress concentration area of ​​the mold, such as the corner of the mold. When the stress detector detects an abnormal change in local stress of the mold, the control system starts the micro piezoelectric actuator 17, drives the slider 19 to slide along the guide rod 18, and actively applies a reverse force through the displacement of the slider 19 to offset or compensate for this abnormal stress change, thereby eliminating or reducing the harmful stress generated by the mold during the die casting process.

[0046] Refer to the instruction manual appendix Figure 11The diameter of the cooling pipe 20 is 4mm-8mm. A main liquid delivery pipe 21 is fixedly connected inside the die 13. Multiple liquid delivery branch pipes 22 are fixedly connected to the main liquid delivery pipe 21. Multiple atomizing nozzles 23 are fixedly connected to the liquid delivery branch pipes 22. The spray direction of the atomizing nozzles 23 is towards the punch body 5.

[0047] It should be noted that the cooling pipes 20 are evenly arranged around the inside of the die 13, and the liquid delivery branch pipes 22 are interspersed between the cooling pipes 20. The atomizing nozzles 23 are installed on the liquid delivery branch pipes 22 at multiple angles, and each atomizing nozzle 23 integrates a one-way valve to ensure that the coolant can only be sprayed outward and cannot flow back. The spraying direction is all towards the punch body 5. Through the atomizing nozzles 23 arranged at multiple angles, the atomized cooling medium can fully cover and evenly act on all surfaces of the punch body 5.

[0048] Refer to the instruction manual appendix Figure 12 A lifting plate 24 is slidably connected inside the lower mold base 2. The lifting plate 24 is provided with a liquid storage chamber 2401 and multiple movable chambers 2402. A flow valve 25 is installed between the movable chambers 2402 and the liquid storage chambers 2401. A top column 26 is slidably connected inside the movable chambers 2402. The diameter of the top column 26 is 10mm-20mm.

[0049] It should be noted that the lifting plate 24, which is slidably connected inside the lower mold base 2, is provided with a liquid storage chamber 2401 and multiple movable chambers 2402. The liquid storage chamber 2401 is used to store hydraulic medium. The flow valve 25 installed between the movable chamber 2402 and the liquid storage chamber 2401 is used to regulate the flow rate of the medium entering each movable chamber in order to control the ejection speed and sequence of the ejector pin 26. The ejector pin 26 is slidably connected in the movable chamber 2402. Its diameter is 10mm-20mm. The top end passes through the reserved hole at the bottom of the die 13. After die casting, the product is smoothly ejected by hydraulic push to avoid product deformation or tearing due to uneven ejection force.

[0050] Refer to the instruction manual appendix Figure 12 A pressure sensor 27 is fixedly connected to the top column 26. The pressure sensor 27 is used to detect the contact pressure between the top column 26 and the product in real time. The range of the pressure sensor 27 is 0N-5000N and the accuracy is not less than 0.5%FS.

[0051] It should be noted that the pressure sensor 27 fixedly connected to the top of the ejector pin 26 is located on the top end face of the ejector pin and is used to detect the contact pressure between the ejector pin 26 and the bottom of the product in real time. The pressure sensor 27 has a range of 0N-5000N and an accuracy of not less than 0.5%FS. During the ejection process, it provides real-time feedback on the force data of each ejector pin. The control system adjusts the ejection force and ejection speed of each ejector pin 26 independently through the flow valve 25 according to the feedback signal to achieve multi-point synchronous or sequential ejection, ensuring that the product demolding process is stable and reliable and preventing product damage caused by uneven ejection load.

[0052] Working principle: During operation, the upper mold base 1 is connected to the die-casting machine slider through the mold handle 3, and the lower mold base 2 is fixed to the worktable. During the mold closing process, multiple positioning rods 6 on the punch fixing plate 4 slide and engage with the positioning holes 1301 on the die 13 to ensure the precise alignment of the punch body 5 and the die 13. At the same time, the pressure plate ring 7 applies a uniform pressing force to the blank under the compression force of the pressing spring 8. After the mold is closed, the control system starts the main infusion pipeline 21 in the concave mold 13 to distribute the release agent to each infusion branch pipeline 22. The release agent is evenly sprayed onto the cavity surface between the closed punch body 5 and the concave mold 13 through the atomizing nozzles 23 arranged at multiple angles and integrated with one-way valves, so that a uniform release agent coating is formed on the working surfaces of the punch body 5 and the concave mold 13, so that the subsequent products can be demolded smoothly. After the spraying is completed, the control system starts the heating coils 12 or cooling channels in the multiple temperature conducting cavities 503 in the punch body 5 according to the temperature data of each temperature control unit area detected in real time by multiple temperature sensors 28 on the inner wall of the concave mold 13. This is to accurately preheat or heat dissipate the independent temperature control unit areas corresponding to the near gate area, thick wall area and thin wall area, so that the mold temperature reaches the process requirements. Then the molten metal enters through the pouring pipe 9. The control system dynamically adjusts the high-speed thermal response valves in the main pouring port 10 and multiple secondary pouring ports 11 according to the feedback signal of the temperature sensor 28, so as to realize the graded speed filling of the molten metal from the center to the edge and from the thick wall to the thin wall area. During die casting filling and pressure holding, the stress relief module installed in the stress concentration area of ​​the mold monitors stress changes in real time through the stress detector integrated on the micro piezoelectric actuator 17. When an abnormality occurs, it immediately drives the slider 19 to slide along the guide rod 18 and actively applies a reverse force to counteract the harmful stress. After the mold is opened, the liquid storage chamber 2401 in the lifting plate 24 connected to the external hydraulic system delivers hydraulic medium to each movable chamber 2402 through the flow valve 25. According to the contact pressure data fed back in real time by the pressure sensor 27 on the top end face of the ejector pin 26, the ejection speed and sequence of each ejector pin 26 are independently adjusted so that the ejector pins 26 with a diameter of 10mm-20mm smoothly eject the product from the cavity mold 13. Meanwhile, if any electronic component fails, the corresponding plug-in module 14 can be pulled out directly from the mounting cavity 1302 on one side of the die 13 after the rotating spring 16 is unlocked, thus achieving rapid maintenance.

[0053] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An automated die-casting mold assembly for the production of metal structural parts, characterized in that: The upper mold base (1) and the lower mold base (2) are included. A mold shank (3) is fixedly connected to the top of the upper mold base (1), and a punch fixing plate (4) is fixedly connected to the bottom of the upper mold base (1). A punch body (5) is fixedly connected between the punch fixing plate (4) and the upper mold base (1). The punch body (5) is divided into multiple independent temperature control unit areas along its working surface. Each temperature control unit area has a temperature conducting cavity (503). A heating coil (12) is installed in the temperature conducting cavity (503). The cooling channel is connected to the external cooling medium circulation system. A casting pipe (9) is installed in the punch body (5). A liquid outlet end of the casting pipe (9) is fixedly connected to a The main pouring port (10) and multiple secondary pouring ports (11) are provided. The bottom of the punch body (5) is provided with a bottom guide groove (501). Multiple side guide grooves (502) are provided around the punch body (5). The main pouring port (10) is located in the bottom guide groove (501). Multiple secondary pouring ports (11) are respectively located in multiple side guide grooves (502). A die (13) is fixedly connected to the lower mold base (2). A cooling pipe (20) is fixedly connected inside the die (13). Multiple temperature sensors (28) are fixedly connected to the inner wall of the die (13). The temperature sensors (28) are used to detect the temperature of each temperature control unit area in real time.

2. The automated die-casting mold assembly for producing metal structural parts according to claim 1, characterized in that: Multiple positioning rods (6) are fixedly connected to the punch fixing plate (4), and a pressure plate ring (7) is slidably connected to the positioning rod (6). A pressure spring (8) is fixedly connected between the pressure plate ring (7) and the punch fixing plate (4). Multiple positioning holes (1301) are opened on the die (13), and the positioning holes (1301) and the positioning rods (6) are slidably connected.

3. The automated die-casting mold assembly for producing metal structural parts according to claim 1, characterized in that: Multiple temperature-conducting cavities (503) are arranged in a ring array inside the punch body (5). The cross-section of the temperature-conducting cavity (503) is rectangular, and the power density of the heating coil (12) is not less than 15W / cm³.

4. The automated die-casting mold assembly for producing metal structural parts according to claim 1, characterized in that: The die (13) has multiple hexagonal mounting cavities (1302) on one side. The mounting cavity (1302) is provided with an anti-error protrusion (13021) and a multi-functional interface (13022). The mounting cavity (1302) is slidably connected with a plug-in module (14).

5. The automated die-casting mold assembly for producing metal structural parts according to claim 4, characterized in that: Multiple fixing rods (15) are fixedly connected to the die (13). Two fixing rods (15) form a group. A group of fixing rods (15) is provided around each mounting cavity (1302). A spring (16) is rotatably connected to the fixing rod (15).

6. The automated die-casting mold assembly for producing metal structural parts according to claim 1, characterized in that: Multiple stress relief modules are installed inside the die (13). The stress relief module includes a micro piezoelectric actuator (17) fixedly connected inside the die (13), a guide rod (18) fixedly connected to the die (13), and a slider (19) slidably connected to the guide rod (18). The micro piezoelectric actuator (17) is used to drive the slider (19) to slide along the guide rod (18).

7. The automated die-casting mold assembly for producing metal structural parts according to claim 1, characterized in that: The diameter of the cooling pipe (20) is 4mm-8mm. The main liquid delivery pipe (21) is fixedly connected inside the die (13). Multiple liquid delivery branch pipes (22) are fixedly connected to the main liquid delivery pipe (21). Multiple atomizing nozzles (23) are fixedly connected to the liquid delivery branch pipes (22). The spraying direction of the atomizing nozzles (23) is towards the punch body (5).

8. The automated die-casting mold assembly for producing metal structural parts according to claim 1, characterized in that: A lifting plate (24) is slidably connected inside the lower mold base (2). The lifting plate (24) is provided with a liquid storage chamber (2401) and multiple movable chambers (2402). A flow valve (25) is installed between the movable chamber (2402) and the liquid storage chamber (2401). A top column (26) is slidably connected inside the movable chamber (2402). The diameter of the top column (26) is 10mm-20mm.

9. An automated die-casting mold assembly for the production of metal structural parts according to claim 8, characterized in that: A pressure sensor (27) is fixedly connected to the top column (26). The pressure sensor (27) is used to detect the contact pressure between the top column (26) and the product in real time. The range of the pressure sensor (27) is 0N-5000N and the accuracy is not less than 0.5%FS.

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