Graphite material aluminum casting mold meeting temperature regulation and control strategy and manufacturing method

Abstract

The invention discloses a graphite material aluminum casting mold meeting a temperature control strategy and a manufacturing method, and relates to the technical field of metal forming, the graphite material aluminum casting mold comprises a mold main body, a temperature measuring system, a cooling measure, a heating measure and a central control system; wherein the mold body is made of an isostatic pressing graphite material, and the temperature measuring system comprises a plurality of temperature measuring points distributed in the mold body and used for collecting temperature-time curves of all positions of the mold body in the casting process in real time; the cooling measure and the heating measure are distributed in the mold main body corresponding to the temperature measuring points; the central control system receives data collected by the temperature measuring system, compares a temperature-time curve with a preset target curve, controls opening and closing of a cooling measure or a heating measure at a corresponding position according to a comparison result, and adjusts the strength of the cooling measure or the heating measure based on the temperature-time curve and a qualified temperature interval. The mold has the advantages of being high in heat transfer efficiency, fast in temperature response and accurate in regulation and control.

Description

Technical Field

[0001] This invention relates to the field of metal forming technology, and in particular to a graphite aluminum casting mold and its manufacturing method that meet temperature control strategies. Background Technology

[0002] A356 aluminum alloy is widely used in the production of key components such as automobile wheels due to its excellent mechanical and machinability. Currently, the production of these components mainly relies on traditional processes such as sand casting, die casting, and precision casting. Although these processes are technically mature, they generally suffer from problems such as cumbersome procedures, the need for extensive machining and surface treatment after casting, low material utilization, and limited production efficiency.

[0003] Low-pressure casting technology is increasingly widely used in aluminum alloy casting production due to its advantages of high casting quality, good dimensional accuracy, and fewer internal defects. It involves injecting molten aluminum alloy into a preheated mold under lower pressure, allowing the metal to solidify under controlled conditions, which can significantly improve the mechanical properties and surface quality of the castings. However, precise control of the solidification rate remains a core challenge in low-pressure casting, and the mold temperature field directly determines the cooling rate at different locations on the casting. Therefore, rapidly and accurately controlling the mold temperature field is crucial to ensuring casting quality.

[0004] Current low-pressure casting primarily uses steel molds, which have low heat transfer coefficients, resulting in slow temperature response. Traditional water-cooling control methods exhibit significant lag, often requiring multiple casting production cycles to stabilize the temperature field. Furthermore, temperature control at different locations interferes with each other, making it difficult to quantify and evaluate the overall effect. In addition, existing control methods heavily rely on operator experience, failing to achieve precise temperature field control. This can easily lead to defects in castings such as shrinkage cavities, porosity, and cracks, severely impacting product yield and production efficiency.

[0005] Therefore, the industry urgently needs an aluminum casting mold with high heat transfer efficiency, fast temperature response, and precise control to address the shortcomings of existing technologies. Summary of the Invention

[0006] To address the problems of low heat transfer efficiency, slow temperature response, and inaccurate temperature control in existing low-pressure casting molds, this invention provides a graphite aluminum casting mold and its manufacturing method that meet temperature control strategies. It is applicable to the low-pressure casting production of various aluminum alloy parts, including A356 aluminum alloy, and effectively solves the problems of lag and insufficient precision in temperature control of traditional molds, significantly improving casting quality and production stability.

[0007] The technical solution adopted by the present invention for a graphite aluminum casting mold that satisfies a temperature control strategy and its manufacturing method is as follows: A graphite-based aluminum casting mold that meets temperature control strategies includes a mold body, a temperature measurement system, cooling measures, heating measures, and a central control system. The mold body is made of isostatically pressed graphite. The temperature measurement system includes multiple temperature measurement points distributed within the mold body for real-time acquisition of temperature-time curves at various locations within the mold body during the casting process. Temperature measurement points corresponding to the cooling and heating measures are distributed within the mold body. The central control system receives data from the temperature measurement system, compares the temperature-time curves with preset target curves, controls the opening and closing of corresponding cooling or heating measures based on the comparison results, and adjusts the intensity of the cooling or heating measures based on the temperature-time curves and the acceptable temperature range.

[0008] A further improvement of the technical solution of the present invention is that: the temperature measurement system includes multiple temperature measurement points, which are distributed on the upper mold, lower mold and side mold of the mold body; wherein, the number of temperature measurement points on the upper mold is 35%-40% of the total temperature measurement points, the number of temperature measurement points on the lower mold is 50%-55% of the total temperature measurement points, and the number of temperature measurement points on the side mold is 5%-10% of the total temperature measurement points.

[0009] A further improvement of the technical solution of the present invention is that: among the multiple temperature measurement points of the upper mold, the number of wheel center temperature measurement points is 10%-15% of the total temperature measurement points of the upper mold, the number of wheel spoke temperature measurement points is 35%-40% of the total temperature measurement points of the upper mold, and the number of outer wheel rim temperature measurement points is 45%-55% of the total temperature measurement points of the upper mold; among the multiple temperature measurement points of the lower mold, the number of wheel center temperature measurement points is 10%-15% of the total temperature measurement points of the lower mold, the number of wheel spoke temperature measurement points is 50%-55% of the total temperature measurement points of the lower mold, and the number of outer wheel temperature measurement points is 30%-40% of the total temperature measurement points of the lower mold; among the multiple temperature measurement points of the side mold, the number of wheel rim temperature measurement points and the number of inner wheel rim temperature measurement points are both 50% of the total temperature measurement points of the side mold.

[0010] A further improvement of the technical solution of the present invention is that: the cooling measures include multiple air-cooled pipes, and the heating measures include multiple heating rods; the corresponding temperature measurement points of the air-cooled pipes and heating rods are distributed in the upper mold, lower mold, and side mold; wherein the number of air-cooled pipes in the upper mold accounts for 40%-45% of the total, the number of air-cooled pipes in the lower mold accounts for 50%-55% of the total, the number of air-cooled pipes in the side mold accounts for 5%-10% of the total, the number of heating rods in the upper mold accounts for 50%-55% of the total, the number of heating rods in the lower mold accounts for 40%-45% of the total, and the number of heating rods in the side mold accounts for 5%-10% of the total.

[0011] A further improvement of the technical solution of the present invention is that: the target curve is the temperature curve of each point of the mold with the highest wheel qualification rate during the production process, and the qualified temperature range is the range of temperature curves of each point of the mold with a high wheel qualification rate during the production process.

[0012] A further improvement of the technical solution of the present invention is that the control logic of the central control system is as follows: when the collected temperature-time curve is lower than the target curve, the heating measures at the corresponding position are activated; when the collected temperature-time curve is higher than the target curve, the cooling measures at the corresponding position are activated; if the temperature-time curve never falls into the qualified temperature range, the intensity of the temperature control measures at the corresponding position is increased; if the temperature-time curve fluctuates repeatedly above and below the qualified temperature range and exceeds it, the intensity of the temperature control measures at the corresponding position is decreased.

[0013] A further improvement of the technical solution of the present invention is that: the mold body further includes a flow divider cone, a pressure plate, a sprue sleeve, and a sprue cup; wherein, the flow divider cone is fixed by the pressure plate and is provided with an independent cooling channel, the sprue sleeve is used in conjunction with the sprue cup, and a filter screen is provided inside the sprue cup.

[0014] A method for manufacturing a graphite aluminum casting mold that satisfies a temperature control strategy, for manufacturing the aforementioned mold, includes the following steps: S1. The upper mold, lower mold and side mold are made of isostatic graphite material, and temperature measurement point mounting holes, air cooling pipe mounting channels and heating rod mounting holes are reserved in the upper mold, lower mold and side mold. S2. Install the temperature measuring element, the air-cooling pipe and the heating rod in the reserved mounting holes and channels respectively, and connect the temperature measuring element to the central control system signal, and connect the air-cooling pipe and the heating rod to the central control system control. S3. Assemble the runner cone, pressure plate, sprue bushing, and sprue cup; S4. Collect temperature-time curves of various points on the mold corresponding to the casting cycle of qualified wheels during trial production, determine the qualified temperature range and target curve, and input them into the central control system. S5. Adjust the control parameters of the central control system to ensure accurate transmission of data collected by the temperature measurement element. The air-cooled pipe and heating rod respond to the control logic to complete the mold manufacturing.

[0015] The technological advancements achieved by this invention due to the adoption of the above technical solutions are as follows: The main body of the mold in this invention is made of isostatic graphite material, which has a much higher heat transfer efficiency than traditional steel molds. This allows the cooling and heating effects to be quickly reflected, solving the core problems of slow heat transfer and lagging control in traditional molds. This invention uses mold materials with high thermal conductivity, targeted temperature acquisition methods, and precise temperature control methods to jointly construct a system for accurately controlling mold temperature. By utilizing the material properties, more complex temperature control methods are achieved.

[0016] This invention achieves comprehensive real-time monitoring of key areas of the mold body through multiple distributed temperature measurement points. Combined with the measurement of temperature measurement points, it can ensure the accuracy of temperature data acquisition. The central control system automatically adjusts based on the dual logic of the target curve and the qualified temperature range, replacing manual experience judgment, avoiding human operation errors, and achieving precise control of the temperature field.

[0017] This invention ensures that the temperature field of the mold body remains stable within the qualified range by correspondingly distributing cooling and heating measures and dynamically adjusting the intensity of control, thereby avoiding casting defects such as shrinkage cavities, porosity, and cracks caused by temperature field deviations and improving the pass rate of aluminum alloy parts such as wheels.

[0018] The mold of this invention can achieve temperature field stability without multiple batch trial productions, reducing debugging time; automated control reduces the cost of manual intervention, while improved casting quality reduces the workload of subsequent machining, thus improving overall production efficiency. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the graphite aluminum casting mold that meets the temperature control strategy of the present invention. Figure 2 This is a cross-sectional view of the upper mold of the graphite aluminum casting mold that meets the temperature control strategy of the present invention. Figure 3 This is a top view of the upper mold of the graphite aluminum casting mold that meets the temperature control strategy of the present invention. Figure 4 This is a cross-sectional view of the lower mold of the graphite aluminum casting mold that meets the temperature control strategy of the present invention. Figure 5 This is a bottom view of the lower mold of the graphite aluminum casting mold that meets the temperature control strategy of the present invention. Figure 6 This is a cross-sectional view of the side mold of the aluminum casting mold made of graphite material that meets the temperature control strategy of the present invention. Figure 7 This is a side view of the side mold of the graphite aluminum casting mold that meets the temperature control strategy of the present invention.

[0020] In the attached diagram: 1. Upper mold; 2. Side mold; 3. Heating rod; 4. Air cooling pipe; 5. Lower mold; 6. Sprue sleeve; 7. Sprue cup; 8. Filter screen; 9. Water cooling pipe; 10. Pressure plate; 11. Cooling channel; 12. Diverter cone. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this invention.

[0022] Example 1

[0023] like Figures 1-6 As shown, this embodiment provides a graphite aluminum casting mold that meets the temperature control strategy. The mold mainly consists of a mold body, a temperature measurement system, cooling measures, heating measures, auxiliary components, and a central control system.

[0024] The mold body includes an upper mold 1, a lower mold 5, and a side mold 2, all of which are made of isostatically pressed graphite material with high thermal conductivity, thus giving the mold body excellent heat transfer efficiency and structural stability. In this embodiment, the cavity surfaces of the upper mold 1, lower mold 5, and side mold 2 are all precision ground to ensure the surface quality of the casting.

[0025] In this embodiment, 114 temperature measurement points are set inside the mold body. The temperature measurement points are distributed in the upper mold 1, lower mold 5 and side mold 2 of the mold body at key monitoring positions. Among them, the upper mold 1 is equipped with 45 temperature measurement points, the lower mold 5 is equipped with 61 temperature measurement points and the side mold 2 is equipped with 8 temperature measurement points.

[0026] The distribution of the above temperature measurement points strictly follows the principle of full coverage of key areas: among the 45 measurement points of the upper mold 1, there are 5 near the wheel center (evenly distributed on the circumference with the wheel center as the center and a radius of 20mm), 16 near the wheel spokes (2-3 points corresponding to each wheel spoke, evenly arranged along the length of the wheel spoke), and 24 near the outer wheel rim (1 arranged every 15° along the circumference of the outer wheel rim); among the 61 measurement points of the lower mold 5, there are 7 near the wheel center (including 1 at the center of the wheel center and 6 evenly distributed around the perimeter), 33 near the wheel spokes (corresponding to the wheel spoke measurement points of the upper mold 1), and 21 near the outer wheel rim (evenly arranged along the inner circumference of the outer wheel rim); among the 8 measurement points of the side mold 2, there are 4 near the wheel rim and 4 near the inner wheel rim, all evenly distributed along the circumference.

[0027] In this embodiment, the temperature measurement system includes 114 K-type thermocouples, each corresponding to one of the 114 temperature measurement points, serving as temperature measuring elements. The measurement range is 0-800℃. The thermocouples are embedded in the mold body, encapsulated in high-temperature ceramic sleeves and then threadedly fixed to the pre-drilled mounting holes. Their measuring ends are flush with the mold cavity surface to avoid affecting the casting process. Simultaneously, all thermocouples are led out from pre-drilled slots inside the mold via high-temperature resistant cables and connected to the signal acquisition module of the central control system.

[0028] In this embodiment, the cooling system employs 68 air-cooled pipes 4. The installation channel of the air-cooled pipe 4 forms a 35° angle with the surface of the mold cavity to ensure that the cooling airflow can act evenly on the inner wall of the mold. Each air-cooled pipe 4 is connected to the main air duct through a branch pipe, and each air-cooled pipe 4 is equipped with an independent solenoid valve, which is individually controlled by the central control system.

[0029] The heating system employs 65 heating rods 3, with an operating temperature range of 0-800℃. The heating rods 3 extend 25mm into the mold, and their ends are insulated with ceramic insulating sleeves. The temperature measurement points corresponding to the heating rods 3 and air-cooling pipes 4 are distributed as follows: upper mold 1 has 29 air-cooling pipes 4 and 33 heating rods 3; lower mold 5 has 35 air-cooling pipes 4 and 28 heating rods 3; and side mold 2 has 4 air-cooling pipes 4 and 4 heating rods 3.

[0030] In this embodiment, the auxiliary components include a flow divider cone 12, pressure plates 10, a sprue sleeve 6, a sprue cup 7, and a filter screen 8. The flow divider cone 12 is made of heat-resistant alloy and is fixed inside the mold by four circumferentially evenly distributed pressure plates 10. The flow divider cone 12 has an independent 7mm cooling channel 11 inside, which is connected to circulating cooling water, which can effectively control the temperature of the flow divider cone 12 and prevent it from deforming due to high temperature.

[0031] Both the sprue sleeve 6 and the sprue cup 7 are made of heat-resistant cast iron and are sealed together. The sprue cup 7 is equipped with a stainless steel filter screen 8, which can effectively filter out oxide impurities and non-metallic inclusions in the molten aluminum and improve the purity of the casting.

[0032] Example 2

[0033] This embodiment provides a method for manufacturing a graphite aluminum casting mold that meets temperature control strategies, including the following steps: S1. Mold Body Machining: The upper mold 1, lower mold 5, and side mold 2 are manufactured using isostatic graphite material. Temperature measurement mounting holes, air-cooling pipe 4 mounting channels, and heating rod 3 mounting holes are pre-drilled in the upper mold 1, lower mold 5, and side mold 2. The machining tolerances of each mounting hole and channel are controlled within ±0.02mm to ensure the assembly accuracy of subsequent components. After machining, the mold cavity surface is finely ground and polished to ensure that the surface roughness meets the standards.

[0034] S2. Functional component installation: First, install the K-type thermocouple into the high-temperature ceramic sleeve. After wrapping the outer wall of the sleeve with high-temperature resistant sealing tape, screw it into the reserved mounting hole, ensuring that the thermocouple measuring end is flush with the cavity surface. Then, connect the thermocouple cable to the signal transmission line through the terminal block. The connection point is protected with high-temperature resistant insulating tape.

[0035] Next, install the air-cooling pipe 4 by inserting it into the preset channel. The gap between the air-cooling pipe 4 and the channel wall is filled and sealed with high-temperature resistant sealant to prevent molten aluminum from seeping in. When installing the heating rod 3, first apply thermally conductive silicone grease to the inner wall of the mounting hole, then insert the heating rod 3 into the hole, ensuring that the heating rod 3 fits tightly against the hole wall to improve heat transfer efficiency. Finally, fix the heating rod 3 lead wire with the terminal block.

[0036] S3. Auxiliary component assembly: Place the flow divider cone 12 in the preset installation position, and then press and fix it with the pressure plate 10 to ensure that the inlet and outlet of the cooling channel 11 of the flow divider cone 12 are aligned and connected with the cooling water pipe outside the mold.

[0037] Press the sprue sleeve 6 into the pre-set mounting hole in the mold, then install the sprue cup 7 in conjunction with the sprue sleeve 6, and apply high-temperature sealant to the mating surfaces to enhance sealing. Finally, place the stainless steel filter screen 8 into the slot inside the sprue cup 7.

[0038] S4. Determination of Qualified Temperature Range and Target Curve: Conduct trial production and debugging, and set casting process parameters. Produce 50 batches of castings continuously. During each batch production process, the central control system collects the temperature-time curves of 114 thermocouples in real time.

[0039] Quality inspections were conducted on the castings produced during the trial production. Batches with a pass rate of ≥95% were selected. Temperature-time curves for each point on the mold corresponding to these batches were extracted, outliers were removed, and the fluctuation range of each temperature curve was taken as the qualified temperature range. Within the qualified temperature range, the set of temperature curves with the fewest internal defects in the castings (no obvious shrinkage cavities or porosity detected by X-ray flaw detection) and the best mechanical properties were selected and determined as the target curves. The qualified temperature range and the target curves were then entered into the central control system.

[0040] S5. System debugging and mold acceptance: Start the central control system and conduct no-load debugging: Set the target temperature and test the accuracy of the thermocouple data; control the heating rod 3 and the air-cooling pipe 4 to alternately operate and test their response time.

[0041] After the no-load test is successful, load test is carried out. Simulated molten aluminum is injected to simulate the casting process, and the execution of the control logic of the central control system is observed: when the temperature at a certain position is 0.5℃ lower than the target curve, does the corresponding heating rod 3 turn on in time? When the temperature is 0.5℃ higher than the target curve, does the corresponding air cooling pipe 4 operate accurately? For positions where the temperature does not fall into the qualified range for 10 seconds, does the system automatically increase the temperature control intensity? For positions that exceed the qualified range 3 times within 10 seconds, does the system automatically decrease the intensity?

[0042] During the load commissioning process, multiple casting cycles were continuously simulated to ensure that the temperature at each point of the mold could be stabilized within the qualified temperature range, with an adjustment accuracy of ±2℃. After meeting the design requirements, the mold manufacturing acceptance was completed.

[0043] In the above embodiments, the present invention provides a graphite aluminum casting mold and its manufacturing method that meet temperature control strategies. The mold body of the present invention uses isostatic graphite material, whose heat transfer efficiency is much higher than that of traditional steel molds, so that the control effect of cooling and heating measures can be quickly reflected, solving the core problems of slow heat transfer and lagging control of traditional molds. The present invention achieves comprehensive real-time monitoring of key areas of the mold body through multiple distributed temperature measurement points. With the measurement of temperature measurement points, the accuracy of temperature data acquisition can be ensured. The central control system automatically controls based on the dual logic of target curve and qualified temperature range, replacing manual experience judgment, avoiding human operation error, and achieving precise control of temperature field. The present invention ensures that the temperature field of the mold body is always stable within the qualified range through the corresponding distribution of cooling and heating measures and the dynamic adjustment of control intensity, avoiding casting defects such as shrinkage cavities, porosity, and cracks caused by temperature field deviation, and improving the pass rate of aluminum alloy parts such as wheels. The mold of the present invention can achieve temperature field stability without multiple batch trial production, reducing debugging time. Automated control reduces the cost of manual intervention, while the improved casting quality reduces the workload of subsequent machining, improving the overall production efficiency.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the inventive concept should fall within the protection scope of the present invention. All technical contents for which protection is sought in this invention are fully described in the claims.

Claims

1. A graphite-based aluminum casting mold that satisfies a temperature control strategy, characterized in that: The system includes a mold body, a temperature measurement system, cooling measures, heating measures, and a central control system. The mold body is made of isostatic graphite. The temperature measurement system includes multiple temperature measurement points distributed within the mold body to collect temperature-time curves at various locations within the mold body during the casting process. The corresponding temperature measurement points for the cooling and heating measures are distributed within the mold body. The central control system receives the data collected by the temperature measurement system, compares the temperature-time curves with preset target curves, controls the opening and closing of the corresponding cooling or heating measures based on the comparison results, and adjusts the intensity of the cooling or heating measures based on the temperature-time curves and the qualified temperature range.

2. The graphite aluminum casting mold that satisfies the temperature control strategy according to claim 1, characterized in that, The temperature measurement system includes multiple temperature measurement points, which are distributed on the upper mold (1), lower mold (5) and side mold (2) of the mold body; wherein, the number of temperature measurement points on the upper mold (1) is 35%-40% of the total number of temperature measurement points, the number of temperature measurement points on the lower mold (5) is 50%-55% of the total number of temperature measurement points, and the number of temperature measurement points on the side mold (2) is 5%-10% of the total number of temperature measurement points.

3. The graphite aluminum casting mold that satisfies the temperature control strategy according to claim 2, characterized in that: Among the multiple temperature measurement points of the upper mold (1), the number of wheel center temperature measurement points is 10%-15% of the total temperature measurement points of the upper mold (1), the number of wheel spoke temperature measurement points is 35%-40% of the total temperature measurement points of the upper mold (1), and the number of outer wheel rim temperature measurement points is 45%-55% of the total temperature measurement points of the upper mold (1); among the multiple temperature measurement points of the lower mold (5), the number of wheel center temperature measurement points is 10%-15% of the total temperature measurement points of the lower mold (5), the number of wheel spoke temperature measurement points is 50%-55% of the total temperature measurement points of the lower mold (5), and the number of outer wheel temperature measurement points is 30%-40% of the total temperature measurement points of the lower mold (5); among the multiple temperature measurement points of the side mold (2), the number of wheel rim temperature measurement points and the number of inner wheel rim temperature measurement points are both 50% of the total temperature measurement points of the side mold (2).

4. The graphite aluminum casting mold that satisfies the temperature control strategy according to claim 2, characterized in that: The cooling measures include multiple air-cooled pipes (4), and the heating measures include multiple heating rods (3); the air-cooled pipes (4) and heating rods (3) have corresponding temperature measurement points distributed on the upper mold (1), lower mold (5) and side mold (2); the number of air-cooled pipes (4) in the upper mold (1) accounts for 40%-45% of the total, the number of air-cooled pipes (4) in the lower mold (5) accounts for 50%-55% of the total, the number of air-cooled pipes (4) in the side mold (2) accounts for 5%-10% of the total, the number of heating rods (3) in the upper mold (1) accounts for 50%-55% of the total, the number of heating rods (3) in the lower mold (5) accounts for 40%-45% of the total, and the number of heating rods (3) in the side mold (2) accounts for 5%-10% of the total.

5. The graphite aluminum casting mold that satisfies the temperature control strategy according to claim 1, characterized in that: The target curve is the temperature curve of each point of the mold with the highest wheel qualification rate during the production process, and the qualified temperature range is the range of temperature curves of each point of the mold with a high wheel qualification rate during the production process.

6. The graphite aluminum casting mold that satisfies the temperature control strategy according to claim 1, characterized in that: The control logic of the central control system is as follows: when the collected temperature-time curve is lower than the target curve, the heating measures at the corresponding location are activated; when the collected temperature-time curve is higher than the target curve, the cooling measures at the corresponding location are activated; if the temperature-time curve never falls into the qualified temperature range, the intensity of the temperature control measures at the corresponding location is increased; if the temperature-time curve fluctuates repeatedly within and exceeds the qualified temperature range, the intensity of the temperature control measures at the corresponding location is decreased.

7. The graphite aluminum casting mold that satisfies the temperature control strategy according to claim 1, characterized in that: The mold body also includes a flow divider cone (12), a pressure plate (10), a sprue sleeve (6), and a sprue cup (7); wherein, the flow divider cone (12) is fixed by the pressure plate (10) and is provided with an independent cooling channel (11), the sprue sleeve (6) is used in conjunction with the sprue cup (7), and a filter screen (8) is provided inside the sprue cup (7).

8. A method for manufacturing a graphite aluminum casting mold that satisfies a temperature control strategy, characterized in that, The method for manufacturing a casting mold according to any one of claims 1-7 comprises the following steps: S1. The upper mold (1), lower mold (5) and side mold (2) are made of isostatic graphite material, and the upper mold (1), lower mold (5) and side mold (2) are reserved with temperature measurement point mounting holes, air cooling pipe (4) mounting channels and heating rod (3) mounting holes; S2. Install the temperature measuring element, the air-cooled pipe (4) and the heating rod (3) in the reserved mounting holes and channels respectively, and connect the temperature measuring element to the central control system signal, and connect the air-cooled pipe (4) and the heating rod (3) to the central control system control. S3. Assemble the flow divider cone (12), pressure plate (10), sprue sleeve (6) and sprue cup (7); S4. Collect temperature-time curves of various points on the mold corresponding to the casting cycle of qualified wheels during trial production, determine the qualified temperature range and target curve, and input them into the central control system. S5. Adjust the control parameters of the central control system to ensure accurate transmission of data collected by the temperature measuring element. The air-cooled pipe (4) and the heating rod (3) respond to the control logic and complete the mold manufacturing.

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