Large casting die with temperature control structure

Abstract

The application relates to a large casting die with a temperature control structure, which comprises an upper die, a lower die and a die foot structure, the upper die and the lower die are arranged in a top-bottom stacking mode, a die foot structure is installed on the lower end surface of the lower die, an upper die core and a lower die core in a top-bottom stacking mode are installed between the upper die and the lower die, an upper heat conduction plate structure is installed in the upper die, a lower heat conduction plate structure is installed at the middle part of the lower die, an upper oil cavity in contact with the upper heat conduction plate structure is arranged at the middle part of the upper end surface of the upper die, a lower oil cavity in butt joint with the lower side of the lower heat conduction plate structure is arranged in the lower part of the lower die, and a temperature control sensor vertically inserted into the upper oil cavity is installed at the middle part of the upper end surface of the upper die. The application has the advantages of simplifying the die structure, reducing the die cost, improving the die production speed, reducing the overall energy consumption, optimizing the die temperature system, improving the product quality and the like.

Description

Technical Field

[0001] This invention relates to the field of die casting mold technology, and in particular to a large die casting mold with a temperature control structure. Background Technology

[0002] In the process of die casting large metal parts, in order to ensure product quality, it is necessary to keep the large molds insulated to prevent the molten metal inside from cooling too quickly, thus ensuring product quality. Conventional insulated molds require multiple piping systems to be installed inside the mold. This type of mold has significant drawbacks. First, the excessive number of internal pipes not only leads to very high mold costs, but also makes the pipe connections very complex, resulting in a bulky mold. Second, the mold needs to be heated during use, but the heating effect of the pipes is very slow, greatly affecting the production speed of the mold. To solve these problems, the mold structure needs to be redesigned. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a large die-casting mold with a temperature control structure, which has the advantages of simplifying the mold structure, reducing the mold cost, increasing the mold production speed, reducing the overall energy consumption, optimizing the mold temperature system, and improving product quality.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: A large die-casting mold with a temperature control structure is provided, including an upper mold, a lower mold, and a mold foot structure. The upper mold and lower mold are stacked vertically. A mold foot structure is installed on the lower end face of the lower mold. An upper mold core and a lower mold core are stacked vertically between the upper mold and the lower mold. An upper heat-conducting plate structure is installed inside the upper mold. A lower heat-conducting plate structure is installed in the middle of the lower mold. A contact point between the upper heat-conducting plate structure and the middle of the upper mold is provided. The upper oil cavity of the upper mold is arranged in the lower part of the lower mold and is connected to the lower side of the lower heat conduction plate structure. A temperature control sensor is installed in the middle of the upper end face of the upper mold and is vertically inserted into the upper oil cavity. Several local heat compensation sensors are installed on the upper end face of the upper mold. A mold cavity structure is arranged between the upper mold core and the lower mold core. The lower end of the local heat compensation sensor extends to the upper side of the mold cavity structure. A left integrated valve group is installed on the left side of the upper end of the upper mold, and a right integrated valve group is installed on the right side of the upper mold.

[0005] The standard material for die-casting molds is typically H13 steel, which has a thermal conductivity of 24.6–36 at room temperature. With a thermal conductivity of W / (m·K), the die-casting mold has very poor thermal conductivity. If heated by pipe alone, it would take at least one hour to heat up. Therefore, in order to improve efficiency, external heating is usually used. However, external heating will affect other parts of the mold and increase the mold maintenance cost.

[0006] This technical solution incorporates upper and lower heat-conducting plate structures within the upper and lower molds. These structures effectively cut off the mold and rapidly raise its temperature. Furthermore, independent upper and lower oil cavities facilitate the filling of insulating oil, which transfers its heat to these structures. This allows for rapid heat transfer into the mold, heating it from the inside out. This prevents damage to other mold components from external heating, extending the mold's overall lifespan and reducing maintenance costs. A temperature control sensor monitors the overall mold temperature and controls it based on the flow of insulating oil. Additionally, several localized heating sensors monitor the internal mold cavity structure. When the temperature drops, these sensors provide localized heating to prevent a decrease in the flow rate of molten aluminum within the mold.

[0007] The upper and lower heat-conducting plate structures are made of silicon carbide, which has high strength and high thermal conductivity. The surfaces of the upper and lower heat-conducting plate structures need to be coated with a mixed coating, which is a mixture of silicon carbide and silicon dioxide.

[0008] The installation location of the local heating sensor needs to be arranged according to the specific structure of the mold cavity. The main nodes to be installed are located at the bending nodes of the mold cavity edge, the branching nodes of the mold cavity, the docking nodes of the flow channel and the mold cavity, and the docking nodes of the venting block and the mold cavity.

[0009] As a supplement to this technical solution, the upper mold includes an upper mold upper frame and an upper mold lower frame. The upper mold upper frame is attached to the upper side of the upper heat-conducting plate structure, and the upper mold lower frame is attached to the lower side of the upper heat-conducting plate structure. The lower mold includes a lower mold upper frame and a lower mold lower frame.

[0010] By arranging the upper and lower molds in a separate structure, the upper and lower molds can heat up faster, improving heating efficiency.

[0011] As a supplement to this technical solution, a grid-shaped isolation frame is vertically installed on the upper side of the upper heat-conducting plate structure. The upper mold upper layer mold frame includes a middle module and an outer ring module. The middle module is installed in the middle part of the isolation frame, and the outer ring module is installed to fill the empty part of the outer ring of the isolation frame of the upper heat-conducting plate structure.

[0012] In this technical solution, by setting up an isolation frame, the heat-conducting structure can further separate the upper mold and upper mold frame, thereby increasing the heating rate of the upper mold and upper mold frame.

[0013] As a supplement to this technical solution, the mold foot structure includes an annular mold foot, a lower base plate, and an ejector plate. The upper end of the annular mold foot is embedded in the lower mold and abuts against the lower side of the lower heat-conducting plate structure. The lower oil cavity is arranged in a ring at the upper end of the annular mold foot. The lower base plate is installed on the lower end of the annular mold foot, and the ejector plate is installed in the middle of the annular mold foot.

[0014] In this technical solution, an annular mold foot is installed as the lower structure of the mold, an ejector plate is installed to facilitate the ejection of the product from the mold cavity, and a lower oil cavity is set to facilitate the filling of heat-insulating oil, so that the heat-insulating oil can heat the lower heat-conducting plate structure.

[0015] As a supplement to this technical solution, the temperature control sensor includes a fixed base, a sensor body, a first oil inlet, and a first oil outlet. The fixed base is embedded in the upper mold and inserted into the upper part of the upper oil cavity. The sensor body is mounted on the fixed base. The first oil inlet and the first oil outlet are mounted side by side on one side of the upper end of the sensor body. The first oil inlet and the first oil outlet are mounted at the lower end of the fixed base. The first oil inlet and the first oil outlet are connected to the first oil inlet and the first oil outlet respectively through internal pipes. A first temperature sensor is mounted in the upper part of the sensor body. A metal probe extending downward and inserted into the upper oil cavity is mounted at the lower end of the first temperature sensor. A protective sleeve structure is fitted on the protruding end of the metal probe. A cable connector that mates with the first temperature sensor is mounted on the sensor body.

[0016] The device is equipped with a fixed base for easy docking with the upper mold. The sensor body is installed to facilitate the installation of the first temperature sensor and metal probe. The first oil inlet and first oil outlet facilitate the injection and flow of insulating oil. The first oil inlet and first oil outlet facilitate communication with the first oil inlet and first oil outlet. The protective sleeve structure prevents the metal probe from bending. The cable connector facilitates docking of the device with an external control panel for real-time monitoring of the temperature of the upper oil chamber.

[0017] The main function of the temperature control sensor is to appropriately regulate the temperature of the upper oil cavity. When the mold is filled, the temperature of the upper oil cavity will increase instantly. When the temperature exceeds 450℃, the first temperature sensor and the metal probe transmit the temperature parameters to the control panel. The control panel controls the pump body, and the pump body injects the heat-insulating oil with a temperature of 350℃ into the upper oil cavity. The temperature of the upper oil cavity begins to gradually decrease. When the temperature drops to 400℃, the pump body stops working.

[0018] As a supplement to this technical solution, the local heating sensor includes a heating element body, a second oil inlet, a second oil outlet, and a second temperature sensor. The heating element body is vertically inserted and installed in the upper mold. The second oil inlet and the second oil outlet are installed side by side on one side of the upper end of the heating element body. The lower end of the heating element body is equipped with a second oil inlet and a second oil outlet. The second oil inlet and the second oil outlet are connected to the second oil inlet and the second oil outlet respectively through pipes. The second temperature sensor is installed inside the heating element body. The upper mold has a local heating cavity corresponding to the lower end of the heating element body. The lower end of the heating element body is provided with a protective sidewall surrounding the inner wall of the local heating cavity.

[0019] In this technical solution, the installation of the heat exchanger body facilitates the arrangement of the second oil inlet, the second oil outlet, and the second temperature sensor. The second temperature sensor facilitates the detection of the temperature of the mold cavity. The local heat exchanger cavity facilitates the inflow of heat-insulating oil, thereby achieving local heating of the area and enabling the molten metal to maintain an appropriate temperature, facilitating the smooth flow of the molten metal.

[0020] This technical solution uses a local heating sensor to monitor the local temperature of the mold cavity. The local heating cavity is filled with insulating oil. When the local heating sensor detects the temperature of a local point in the mold cavity structure, it is activated when the temperature is below 180℃. The local heating sensor continuously replenishes the insulating oil so that the temperature at that point can always be maintained at around 200℃.

[0021] As a supplement to this technical solution, the left integrated valve group includes a main support, a main oil inlet pipe, and a main oil outlet pipe. The main oil inlet pipe and the main oil outlet pipe are installed side by side inside the main support. Two rows of docking nozzles are installed side by side on one side of the main support. The lower row of docking nozzles is directly installed on the main oil outlet pipe. Several solenoid valves are evenly installed on the upper side of the main support. The oil inlet of the solenoid valve is connected to the main oil inlet pipe. The oil outlet of the solenoid valve is connected to the upper row of docking nozzles. A control cabinet is installed on the main support.

[0022] In this technical solution, a main support is set up to enable centralized connection of the local heating sensors. The main body oil inlet pipe and main body oil outlet pipe are installed to input and output the insulation oil to the local heating sensors. Several solenoid valves are installed to control the local heating sensors individually. A control cabinet is installed to control the local heating sensors, so that the local heating sensors can be turned on and off independently according to actual needs.

[0023] As a supplement to this technical solution, the upper mold is equipped with connecting pipes that connect to the upper oil cavity on its front and rear sides, and the lower mold is also equipped with connecting pipes that connect to the lower oil cavity on its front and rear sides.

[0024] By setting up the connecting pipe 51, the upper and lower oil chambers can be quickly filled and drained with insulating oil. Before production, the mold needs to be preheated. By opening the connecting pipe, the insulating oil can be quickly filled into the mold, so that the mold can be at 300°C, which will greatly increase the quality of the product during mold production.

[0025] If the temperature difference between the molten metal and the mold is too large during production, it will cause the mold to generate severe alternating thermal stress, thereby accelerating the thermal fatigue of the mold, causing early cracking and deformation, significantly shortening the service life of the mold, and at the same time, problems such as cold shuts, flow marks, and undercasting will appear on the surface of the product.

[0026] As a supplement to this technical solution, the inlet and outlet of the temperature control sensor are connected to the right integrated valve group via pipes, and the inlet and outlet of the local heating sensor are connected to the left integrated valve group via pipes.

[0027] By setting up integrated valve groups on the right and left, temperature control sensors and local heating sensors can be centrally arranged, simplifying the mold structure.

[0028] As a supplement to this technical solution, the right integrated valve group and the left integrated valve group are connected to the energy-saving heat exchange system through pipelines. The energy-saving heat exchange system includes a first oil pump, a second oil pump, and a double-plate heat exchanger. The right outlet of the double-plate heat exchanger is connected to the inlet of the second oil pump through a pipeline. The outlet of the second oil pump is connected to the inlet of the right integrated valve group through a pipeline. The outlet of the right integrated valve group is connected to the right inlet of the double-plate heat exchanger through a pipeline. The left outlet of the double-plate heat exchanger is connected to the inlet of the first oil pump through a pipeline. The outlet of the first oil pump is connected to the inlet of the left integrated valve group through a pipeline. The outlet of the left integrated valve group is connected to the left inlet of the double-plate heat exchanger through a pipeline.

[0029] This technical solution utilizes an energy-saving heat exchange system to effectively utilize the local heat generated during mold production, thereby achieving energy saving. Through a double-plate heat exchanger, a first oil pump, and a second oil pump, an energy loop is formed between the temperature control sensor and the local heat compensation sensor.

[0030] Beneficial Effects: This invention relates to a large die-casting mold with a temperature control structure. An upper heat-conducting plate structure and a lower heat-conducting plate structure are embedded inside the upper and lower molds. These structures can cut off the mold and rapidly raise its temperature. Furthermore, the invention includes independent upper and lower oil cavities for easy filling with insulating oil. The insulating oil transfers its own heat to the upper and lower heat-conducting plate structures, which then rapidly transfer heat into the mold, allowing the mold to heat from the inside out. Heating is used to prevent damage to other components of the mold from external heating, thereby increasing the overall lifespan of the mold and reducing maintenance costs. Temperature sensors are added to monitor the overall temperature of the mold, and the temperature is controlled by the inflow and outflow of insulating oil. Several localized heating sensors are also installed to monitor the temperature of the internal mold cavity structure. When the temperature drops, the localized heating sensors provide localized heating to the cavity structure, preventing a decrease in the flow rate of molten aluminum within the mold. This method offers advantages such as simplified mold structure, reduced mold costs, increased mold production speed, reduced overall energy consumption, optimized mold temperature system, and improved product quality. Attached Figure Description

[0031] Figure 1 This is the front view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is the left view of the present invention; Figure 4 This is the present invention. Figure 2 A cross-sectional view along the AA direction; Figure 5 This is the present invention. Figure 4 A magnified view of a section at point C; Figure 6 This is the present invention. Figure 2 A magnified view of a section at point D; Figure 7 This is the present invention. Figure 6 A partial sectional view along the BB direction; Figure 8 This is the present invention. Figure 7 A magnified view of a section at point E in the middle; Figure 9 This is a structural view of the left integrated valve assembly described in this invention; Figure 10 This is a structural view of the solenoid valve described in this invention; Figure 11 This is a schematic diagram of the energy-saving heat exchange system described in this invention.

[0032] Illustrations: 1. Upper mold, 2. Lower mold, 3. Mold foot structure, 4. Upper heat-conducting plate structure, 5. Lower heat-conducting plate structure, 6. Left integrated valve assembly, 7. Right integrated valve assembly, 8. Middle module, 9. Outer ring module, 10. Local heat compensation sensor, 11. Temperature control sensor, 12. Sprue structure, 13. Fixed base, 14. Upper oil cavity, 15. Lower oil cavity, 16. Mold cavity structure, 17. Upper mold core, 18. Lower mold core, 19. Upper mold upper frame, 20. Upper mold lower frame, 21. Lower mold upper frame, 22. Lower mold lower frame, 23. Annular mold foot, 24. Lower base plate, 25. Ejector plate, 26. Sensor body, 27. First oil inlet, 28. First 29. Oil outlet, 30. Cable connector, 31. First temperature sensor, 32. First oil inlet, 33. First oil outlet, 34. Metal probe, 35. Protective sleeve structure, 36. Second oil inlet, 37. Second oil outlet, 38. Heat exchanger body, 39. Local heat exchanger cavity, 40. Protective sidewall, 41. Second temperature sensor, 42. Second oil inlet, 43. Second oil outlet, 44. Main support, 45. Control cabinet, 46. Main oil inlet pipe, 47. Main oil outlet pipe, 48. Connecting nozzle, 49. Solenoid valve, 50. First oil pump, 51. Double plate heat exchanger, 52. Connecting pipe, 53. Isolation frame, 54. Energy-saving heat exchange system, 55. Second oil pump. Detailed Implementation

[0033] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0034] Embodiments of the present invention relate to a large die-casting mold for casting parts with a temperature control structure, such as... Figures 1-4As shown, the device includes an upper mold 1, a lower mold 2, and a mold foot structure 3. The upper mold 1 and lower mold 2 are stacked vertically. The mold foot structure 3 is installed on the lower end face of the lower mold 2. An upper mold core 17 and a lower mold core 18, stacked vertically, are installed between the upper mold 1 and the lower mold 2. An upper heat-conducting plate structure 4 is installed inside the upper mold 1. A lower heat-conducting plate structure 5 is installed in the middle of the lower mold 2. An upper oil cavity 14, which contacts the upper heat-conducting plate structure 4, is provided in the middle of the upper mold 1. A lower oil cavity 14, which contacts the lower heat-conducting plate structure 4, is arranged in the lower part of the lower mold 2. The lower oil cavity 15 is connected to the lower side of the heat-conducting plate structure 5. A temperature control sensor 11 is installed in the middle of the upper end face of the upper mold 1, which is vertically inserted into the upper oil cavity 14. Several local heat supplementation sensors 10 are installed on the upper end face of the upper mold 1. A mold cavity structure 16 is arranged between the upper mold core 17 and the lower mold core 18. The lower end of the local heat supplementation sensor 10 extends to the upper side near the mold cavity structure 16. A left integrated valve group 6 is installed on the left side of the upper end of the upper mold 1, and a right integrated valve group 7 is installed on the right side of the upper mold 1.

[0035] The standard material for die-casting molds is typically H13 steel, which has a thermal conductivity of 24.6–36 at room temperature. With a thermal conductivity of W / (m·K), the die-casting mold has very poor thermal conductivity. If heated by pipe alone, it would take at least one hour to heat up. Therefore, in order to improve efficiency, external heating is usually used. However, external heating will affect other parts of the mold and increase the mold maintenance cost.

[0036] In this technical solution, an upper heat-conducting plate structure 4 and a lower heat-conducting plate structure 5 are embedded inside the upper mold 1 and the lower mold 2. The upper and lower heat-conducting plate structures 4 and 5 can cut off the mold and rapidly raise its temperature. Furthermore, this technical solution includes independent upper and lower oil cavities 14 and 15 for easy filling with insulating oil. The insulating oil can transfer its own heat to the upper and lower heat-conducting plate structures 4 and 5, which can then quickly dissipate the heat. The heat is rapidly conducted to the mold, allowing the mold to be heated from the inside out. This prevents damage to other parts of the mold from external heating, improves the overall lifespan of the mold, and reduces mold maintenance costs. At the same time, a temperature control sensor 11 is added to monitor the overall temperature of the mold, and the temperature of the mold is controlled by the inflow and outflow of the insulating oil. In addition, several local heat compensation sensors 10 are installed to monitor the temperature of the mold cavity structure 16 inside the mold. When the temperature drops, the local heat compensation sensors 10 provide local heat compensation to the mold cavity structure 16 to prevent the flow rate of aluminum liquid in the mold from decreasing.

[0037] The upper heat-conducting plate structure 4 and the lower heat-conducting plate structure 5 are made of silicon carbide. Silicon carbide itself has high strength and high thermal conductivity. At the same time, the surfaces of the upper heat-conducting plate structure 4 and the lower heat-conducting plate structure 5 need to be coated with a mixed coating, which is a mixture of silicon carbide and silicon dioxide.

[0038] The installation position of the local heating sensor 10 needs to be arranged according to the specific structure of the mold cavity. The main nodes are located at the bending nodes of the mold cavity edge, the bifurcation nodes of the mold cavity, the docking nodes of the flow channel and the mold cavity, and the docking nodes of the venting block and the mold cavity.

[0039] As a supplement to this technical solution, the upper mold 1 includes an upper mold upper frame 19 and an upper mold lower frame 20. The upper mold upper frame 19 is attached to the upper side of the upper heat-conducting plate structure 4, and the upper mold lower frame 20 is attached to the lower side of the upper heat-conducting plate structure 4. The lower mold 2 includes a lower mold upper frame 21 and a lower mold lower frame 22.

[0040] By arranging the upper mold 1 and the lower mold 2 into a separate structure, the upper mold 1 and the lower mold 2 can heat up faster, thus improving heating efficiency.

[0041] As a supplement to this technical solution, a grid-shaped isolation frame 52 is vertically installed on the upper side of the upper heat-conducting plate structure 4. The upper mold upper layer mold frame 19 includes an intermediate module 8 and an outer ring module 9. The intermediate module 8 is installed in the middle part of the isolation frame, and the outer ring module 9 is installed to fill the empty part of the outer ring of the isolation frame 52 of the upper heat-conducting plate structure 4.

[0042] In this technical solution, by setting up an isolation frame 52, the heat conduction structure can further separate the upper mold upper layer mold frame 19, thereby further improving the heating rate of the upper mold upper layer mold frame 19.

[0043] As a supplement to this technical solution, the mold foot structure 3 includes an annular mold foot 23, a lower base plate 24, and an ejector plate 25. The upper end of the annular mold foot 23 is embedded in the lower mold 2 and abuts against the lower side of the lower heat-conducting plate structure 5. The lower oil cavity 15 is arranged in a ring on the upper end of the annular mold foot 23. The lower base plate 24 is installed on the lower end of the annular mold foot 23, and the ejector plate 25 is installed in the middle of the annular mold foot 23.

[0044] In this technical solution, an annular mold foot 23 is installed as the lower structure of the mold, an ejector plate 25 is installed to facilitate the ejection of the product from the mold cavity structure 16, and a lower oil cavity 15 is set to facilitate the filling of heat-insulating oil, so that the heat-insulating oil can heat the lower heat-conducting plate structure 5.

[0045] like Figure 5As shown, as a supplement to this technical solution, the temperature control sensor 11 includes a fixed base 13, a sensor body 26, a first oil inlet 27, and a first oil outlet 28. The fixed base 13 is embedded in the upper mold 1 and inserted into the upper part of the upper oil cavity 14. The sensor body 26 is mounted on the fixed base 13. The first oil inlet 27 and the first oil outlet 28 are mounted side by side on one side of the upper end of the sensor body 26. The lower end of the fixed base 13 is equipped with a first oil inlet 31 and a first... The oil outlet 32, the first oil inlet 31 and the first oil outlet 32 ​​are respectively connected to the first oil inlet 27 and the first oil outlet 28 through internal pipes. The upper part of the sensor body 26 is equipped with a first temperature sensor 30. The lower end of the first temperature sensor 30 is equipped with a metal probe 33 that extends downward and is inserted into the upper oil cavity 14. The protruding end of the metal probe 33 is fitted with a protective sleeve structure 34. The sensor body 26 is equipped with a cable connector 29 that is connected to the first temperature sensor 30.

[0046] The mounting base 13 facilitates docking with the upper mold 1. The sensor body 26 facilitates the installation of the first temperature sensor 30 and the metal probe 33. The first oil inlet 27 and the first oil outlet 28 facilitate the injection and outflow of insulating oil. The first oil inlet 31 and the first oil outlet 32 ​​facilitate communication with the first oil inlet 27 and the first oil outlet 28. The protective sleeve structure 34 prevents the metal probe 33 from bending. The cable connector 29 facilitates docking with the device and the external control panel for real-time monitoring of the temperature of the upper oil chamber 14.

[0047] The main function of the temperature control sensor 11 is to appropriately regulate the temperature of the upper oil cavity 14. When the mold is filled, the temperature of the upper oil cavity 14 will increase instantly. When the temperature exceeds 450°C, the first temperature sensor 30 and the metal probe 33 transmit the temperature parameters to the control panel. The control panel controls the pump body, and the pump body injects the heat-insulating oil with a temperature of 350°C into the upper oil cavity 14. The temperature of the upper oil cavity 14 begins to gradually decrease. When the temperature drops to 400°C, the pump body stops working.

[0048] like Figures 6-8As shown, as a supplement to this technical solution, the local heating sensor 10 includes a heater body 37, a second oil inlet 35, a second oil outlet 36, and a second temperature sensor 40. The heater body 37 is vertically inserted and installed in the upper mold 1. The second oil inlet 35 and the second oil outlet 36 are installed side by side on one side of the upper end of the heater body 37. The lower end of the heater body 37 is equipped with a second oil inlet 41 and a second oil outlet 42. The second oil inlet 41 and the second oil outlet 42 are connected to the second oil inlet 35 and the second oil outlet 36 respectively through pipes. The second temperature sensor 40 is installed inside the heater body 37. The upper mold 1 is provided with a local heating cavity 38 corresponding to the lower end of the heater body 37. The lower end of the heater body 37 is provided with a protective sidewall 39 surrounding the inner sidewall of the local heating cavity 38.

[0049] In this technical solution, the installation of the heat exchanger body 37 facilitates the arrangement of the second oil inlet 35, the second oil outlet 36, and the second temperature sensor 40. The second temperature sensor 40 is used to facilitate the detection of the temperature of the mold cavity. The local heat exchanger cavity 38 is used to facilitate the inflow of heat-insulating oil, thereby achieving local heating of the area and enabling the molten metal to maintain an appropriate temperature, which facilitates the smooth flow of the molten metal.

[0050] The local heating sensor 10 in this technical solution is used to monitor the local temperature of the mold cavity. The local heating cavity 38 is filled with heat-insulating oil. When the local heating sensor 10 detects the temperature of a local point in the mold cavity structure 16, the local heating sensor 10 is activated when the temperature is below 180℃. The local heating sensor 10 continuously replenishes the heat-insulating oil so that the temperature at that point can always be maintained at around 200℃.

[0051] like Figure 9 and Figure 10 As shown, as a supplement to this technical solution, the left integrated valve group 6 includes a main support 43, a main oil inlet pipe 45, and a main oil outlet pipe 46. The main oil inlet pipe 45 and the main oil outlet pipe 46 are installed side by side vertically inside the main support 43. Two rows of docking nozzles 47 are installed side by side vertically on one side of the main support 43. The lower row of docking nozzles 47 is directly installed on the main oil outlet pipe 46. Several solenoid valves 48 are evenly installed on the upper side of the main support 43. The oil inlet of the solenoid valve 48 is connected to the main oil inlet pipe 45, and the oil outlet of the solenoid valve 48 is connected to the upper row of docking nozzles 47. A control cabinet 44 is installed on the main support 43.

[0052] In this technical solution, a main support 43 is set up to enable the local heating sensor 10 to be centrally connected. The main oil inlet pipe 45 and the main oil outlet pipe 46 are installed to input and output heat-insulating oil to the local heating sensor 10. Several solenoid valves 48 are installed to control the local heating sensor 10 individually. A control cabinet 44 is installed to control the local heating sensor 10, so that the local heating sensor 10 can be independently turned on and off according to actual needs.

[0053] As a supplement to this technical solution, the upper mold 1 is equipped with connecting pipes 51 that connect to the upper oil cavity 14 on its front and rear sides, and the lower mold 2 is also equipped with connecting pipes 51 that connect to the lower oil cavity 15 on its front and rear sides.

[0054] By setting up the connecting pipe 51, the upper oil chamber 14 and the lower oil chamber 15 can be quickly filled and flowed out with heat-insulating oil. Before production, the mold needs to be preheated. By opening the connecting pipe 51, the heat-insulating oil can be quickly filled into the mold, so that the mold can be at 300°C, thereby greatly increasing the quality of the product during mold production.

[0055] If the temperature difference between the molten metal and the mold is too large during production, it will cause the mold to generate severe alternating thermal stress, thereby accelerating the thermal fatigue of the mold, causing early cracking and deformation, significantly shortening the service life of the mold, and at the same time, problems such as cold shuts, flow marks, and undercasting will appear on the surface of the product.

[0056] As a supplement to this technical solution, the inlet and outlet of the temperature control sensor 11 are connected to the right integrated valve group 7 via pipes, and the inlet and outlet of the local heating sensor 10 are connected to the left integrated valve group 6 via pipes.

[0057] The temperature control sensor 11 and the local heating sensor 10 are centrally arranged by setting up the right integrated valve group 7 and the left integrated valve group 6, which simplifies the mold structure.

[0058] like Figure 11As shown, as a supplement to this technical solution, the right integrated valve group 7 and the left integrated valve group 6 are connected to the energy-saving heat exchange system 53 via pipelines. The energy-saving heat exchange system 53 includes a first oil pump 49, a second oil pump 54, and a double-plate heat exchanger 50. The right outlet of the double-plate heat exchanger 50 is connected to the inlet of the second oil pump 54 via a pipeline. The outlet of the second oil pump 54 is connected to the inlet of the right integrated valve group 7 via a pipeline. The outlet of the right integrated valve group 7 is connected to the right inlet of the double-plate heat exchanger 50 via a pipeline. The left outlet of the double-plate heat exchanger 50 is connected to the inlet of the first oil pump 49 via a pipeline. The outlet of the first oil pump 49 is connected to the inlet of the left integrated valve group 6 via a pipeline. The outlet of the left integrated valve group 6 is connected to the left inlet of the double-plate heat exchanger 50 via a pipeline.

[0059] In this technical solution, by setting up an energy-saving heat exchange system 53, the local heat generated during the mold production process can be effectively utilized, thereby achieving the effect of energy saving. Through the double plate heat exchanger 50, the first oil pump 49 and the second oil pump 54, an energy loop is formed between the temperature control sensor 11 and the local heat compensation sensor 10.

[0060] The basic principle is as follows: First, the base temperature of the insulating oil needs to be set, generally around 350℃. The temperature control sensor 11 is positioned over the upper oil cavity 14, which is close to the gating structure 12 of the upper mold 1. When molten metal at a temperature as high as 600℃ enters the mold, the temperature of the insulating oil in the upper oil cavity 14 will increase sharply. The temperature control sensor 11 has a set start-up temperature of 450℃. When the temperature in the upper oil cavity 14 exceeds 450℃, the second oil pump 54 will be activated, allowing insulating oil to be injected into the upper oil cavity 14, thus lowering its temperature. The excessively hot insulating oil will be sent into one plate of the double-plate heat exchanger 50. The other plate of the double-plate heat exchanger 50 will absorb the returning heat, increasing the temperature of the insulating oil in the other plate and ensuring that the output temperature of the insulating oil in the other plate is 300℃. When the temperature monitored by the temperature control sensor 11 is below 450℃, the second oil pump 54 will stop working.

[0061] Meanwhile, the local heating sensor 10 monitors the temperature of the corresponding local area of ​​the mold. When the temperature of the monitored area is less than 180°C, the local heating sensor 10 needs to heat the area locally. At this time, the first oil pump 49 is started. The first oil pump 49 injects the heat-insulating oil with a temperature of 300°C from the other plate of the double plate heat exchanger 50 into the monitoring position of the local heating sensor 10, so that the temperature of the monitored position can be replenished and the temperature can be maintained at about 200°C. When the local heating sensor 10 detects that the temperature at the location has reached 200°C, it will stop the first oil pump 49.

[0062] Two sets of heat-insulating oil circulation systems can ensure that the mold is kept at a constant temperature during use, ensuring the quality of large products and avoiding quality changes caused by rapid changes in mold temperature.

[0063] Meanwhile, a double-plate heat exchanger 50 is installed in the energy-saving heat exchange system 53, which enables the two cycles to be connected, allowing heat energy to be converted into each other and making reasonable use of the temperature of the metal solution, thereby achieving the effect of energy saving.

Claims

1. A large die-casting mold with a temperature control structure, comprising an upper mold (1), a lower mold (2), and a mold foot structure (3), wherein the upper mold (1) and the lower mold (2) are stacked vertically, the mold foot structure (3) is installed on the lower end face of the lower mold (2), and an upper mold core (17) and a lower mold core (18) stacked vertically are installed between the upper mold (1) and the lower mold (2), characterized in that: The upper mold (1) is equipped with an upper heat-conducting plate structure (4), and the lower mold (2) is equipped with a lower heat-conducting plate structure (5) in the middle. The upper mold (1) is provided with an upper oil cavity (14) that contacts the upper heat-conducting plate structure (4) in the middle. The lower mold (2) is provided with a lower oil cavity (15) that connects to the lower side of the lower heat-conducting plate structure (5) in the lower part. The upper end face of the upper mold (1) is equipped with a vertically inserted part that is inserted into the upper oil cavity (14). The temperature control sensor (11) is installed on the upper surface of the upper mold (1), and several local heat compensation sensors (10) are installed on the upper surface of the upper mold (1). A mold cavity structure (16) is arranged between the upper mold core (17) and the lower mold core (18). The lower end of the local heat compensation sensor (10) extends to the upper side near the mold cavity structure (16). A left integrated valve group (6) is installed on the left side of the upper end of the upper mold (1), and a right integrated valve group (7) is installed on the right side of the upper mold (1).

2. A large die-casting mold with a temperature control structure according to claim 1, characterized in that: The upper mold (1) includes an upper mold frame (19) and a lower mold frame (20). The upper mold frame (19) is attached to the upper side of the upper heat-conducting plate structure (4), and the lower mold frame (20) is attached to the lower side of the upper heat-conducting plate structure (4). The lower mold (2) includes an upper mold frame (21) and a lower mold frame (22).

3. A large die-casting mold with a temperature control structure according to claim 2, characterized in that: The upper heat-conducting plate structure (4) has a vertically installed grid-shaped isolation frame (52) on its upper side. The upper mold upper layer mold frame (19) includes an intermediate module (8) and an outer ring module (9). The intermediate module (8) is installed in the middle part of the isolation frame. The outer ring module (9) is installed to fill the empty part of the outer ring of the isolation frame (52) of the upper heat-conducting plate structure (4).

4. A large die-casting mold with a temperature control structure according to claim 1, characterized in that: The mold foot structure (3) includes an annular mold foot (23), a lower base plate (24) and an ejector plate (25). The upper end of the annular mold foot (23) is embedded in the lower mold (2) and abuts against the lower side of the lower heat-conducting plate structure (5). The lower oil cavity (15) is arranged in a ring on the upper end of the annular mold foot (23). The lower base plate (24) is installed on the lower end of the annular mold foot (23). The ejector plate (25) is installed in the middle of the annular mold foot (23).

5. A large die-casting mold with a temperature control structure according to claim 1, characterized in that: The temperature control sensor (11) includes a fixed base (13), a sensor body (26), a first oil inlet (27) and a first oil outlet (28). The fixed base (13) is embedded in the upper mold (1) and inserted into the upper part of the upper oil cavity (14). The sensor body (26) is installed on the fixed base (13). The first oil inlet (27) and the first oil outlet (28) are installed side by side on one side of the upper end of the sensor body (26). The first oil inlet (31) and the first oil outlet (32) are installed at the lower end of the fixed base (13). The first oil inlet (31) and the first oil outlet (32) are connected to the first oil inlet (27) and the first oil outlet (28) respectively through internal pipes. The upper part of the sensor body (26) is equipped with a first temperature sensor (30). The lower end of the first temperature sensor (30) is equipped with a metal probe (33) that extends downward and is inserted into the upper oil cavity (14). The protruding end of the metal probe (33) is fitted with a protective sleeve structure (34). The sensor body (26) is equipped with a cable connector (29) that is connected to the first temperature sensor (30).

6. A large die-casting mold with a temperature control structure according to claim 1, characterized in that: The local heating sensor (10) includes a heating element body (37), a second oil inlet (35), a second oil outlet (36), and a second temperature sensor (40). The heating element body (37) is vertically inserted into the upper mold (1). The second oil inlet (35) and the second oil outlet (36) are installed side by side on one side of the upper end of the heating element body (37). The second oil inlet (41) and the second oil outlet (42) are installed at the lower end of the heating element body (37). The second oil inlet (41) and the second oil outlet (42) are connected to the second oil inlet (35) and the second oil outlet (36) respectively through pipes. The second temperature sensor (40) is installed inside the heat exchanger body (37). The upper mold (1) is provided with a local heat exchanger cavity (38) corresponding to the lower end of the heat exchanger body (37). The lower end of the heat exchanger body (37) is provided with a protective sidewall (39) surrounding the inner sidewall of the local heat exchanger cavity (38).

7. A large die-casting mold with a temperature control structure according to claim 6, characterized in that: The left integrated valve group (6) includes a main support (43), a main oil inlet pipe (45) and a main oil outlet pipe (46). The main oil inlet pipe (45) and the main oil outlet pipe (46) are installed side by side inside the main support (43). Two rows of docking nozzles (47) are installed side by side on one side of the main support (43). The lower row of docking nozzles (47) is directly installed on the main oil outlet pipe (46). Several solenoid valves (48) are evenly installed on the upper side of the main support (43). The oil inlet of the solenoid valve (48) is connected to the main oil inlet pipe (45). The oil outlet of the solenoid valve (48) is connected to the upper row of docking nozzles (47). A control cabinet (44) is installed on the main support (43).

8. A large die-casting mold with a temperature control structure according to claim 1, characterized in that: The upper mold (1) is equipped with connecting pipes (51) that connect to the upper oil cavity (14) on its front and rear sides, and the lower mold (2) is also equipped with connecting pipes (51) that connect to the lower oil cavity (15) on its front and rear sides.

9. A large die-casting mold with a temperature control structure according to claim 1, characterized in that: The inlet and outlet of the temperature control sensor (11) are connected to the right integrated valve group (7) through pipes, the inlet and outlet of the local heat supplement sensor (10) are connected to the left integrated valve group (6) through pipes, and the right integrated valve group (7) and the left integrated valve group (6) are connected to the energy-saving heat exchange system (53) through pipes.

10. A large die-casting mold with a temperature control structure according to claim 9, characterized in that: The energy-saving heat exchange system (53) includes a first oil pump (49), a second oil pump (54), and a double-plate heat exchanger (50). The right outlet of the double-plate heat exchanger (50) is connected to the inlet of the second oil pump (54) through a pipe. The outlet of the second oil pump (54) is connected to the inlet of the right integrated valve group (7) through a pipe. The outlet of the right integrated valve group (7) is connected to the right inlet of the double-plate heat exchanger (50) through a pipe. The left outlet of the double-plate heat exchanger (50) is connected to the inlet of the first oil pump (49) through a pipe. The outlet of the first oil pump (49) is connected to the inlet of the left integrated valve group (6) through a pipe. The outlet of the left integrated valve group (6) is connected to the left inlet of the double-plate heat exchanger (50) through a pipe.

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