Intelligent temperature control device for die-casting mould with local chilling system

Abstract

The application discloses a die-casting die temperature intelligent regulation and control device with a local chilling system, relates to the technical field of die-casting dies, and is based on the chilling system in the die-casting die and specifically improves the die temperature control. The temperature control process is mainly concentrated on the local position of the chilling system arranged on the die body. The process is based on the indirect heat exchange between the strong chilling medium and the molten metal in the cavity and uses gas as a "soft heat conduction medium". The process includes three indirect heat exchange processes, namely liquid-liquid, solid-gas-liquid and gas-liquid. Under the condition that the chilling system does not affect the instantaneous chilling of the local position of the cavity, the temperature change in the soft heat exchange bin is actively changed to limit the temperature change process of the die body. The purpose is to avoid irreversible thermal stress damage caused by the large temperature difference of the die itself in the chilling process. The whole process is mainly controlled in a dynamic temperature difference mode, and the global temperature control is only performed on the temperature peak value as a reference object.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, and more specifically to a die-casting mold temperature control device with a local quenching system. Background Technology

[0002] The essence of die casting mold is the conversion process of liquid metal (molten state) to solid metal. In the process, a local cooling system must be added for the cavity part, specifically in the core / deep cavity part, thick wall of casting or geometric change points, etc. For details, please refer to the publication numbers CN109047709A, CN103921089A and other documents.

[0003] The core technology in the die-casting cooling process is the quenching system, which uses a huge temperature difference to achieve millisecond-level rapid solidification. However, the conventional water system layout is rigid and cannot fully conform to the complex cavity surface, resulting in uneven cooling distribution in local areas. In addition, if there is a high temperature difference (>250℃) between the quenching medium and the mold itself, it will cause thermal stress damage to the mold. Furthermore, if the quenching speed is too fast (>1000℃ / s), the metal surface layer will solidify prematurely, hindering subsequent molten metal replenishment and causing problems such as cold shuts and undercasting. Thus, it can be understood that the quenching system essentially promotes product molding through extreme heat conduction, but its temperature control is a key link in the overall quenching technology. This invention proposes a solution to this problem. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent temperature control device for die casting molds with a local quenching system. It proposes an optimization scheme for the temperature control of the quenching system in die casting molds, aiming to avoid the problem of product molding quality being affected by excessive temperature difference between the medium and the mold and excessively fast quenching speed.

[0005] The objective of this invention can be achieved through the following technical solution: a die-casting mold temperature intelligent control device with a local quenching system, which is applied in the mold body of the die-casting mold and uses an infrared temperature measurement structure and a quenching system. The mold body is provided with an external sleeve at the external position corresponding to its internal cavity. The bottom position of the external sleeve is provided as an enhanced heat exchange chamber, and a quenching channel connected to the enhanced heat exchange chamber is provided at the center point of the external sleeve.

[0006] The external sleeve is configured as a soft heat exchange chamber at the inner position of the outer wall of the quench channel. The enhanced heat exchange chamber is in indirect contact with the cavity of the mold body. The soft heat exchange chamber is in indirect contact with the mold body. A return sleeve is provided at one end of the external sleeve. The return sleeve is provided with multiple return water capillaries that penetrate the soft heat exchange chamber.

[0007] The system is further configured such that: the quenching system generates an instantaneous quenching action through the quenching channel and the enhanced heat exchange chamber; during the instantaneous quenching action, the quenching medium is injected into the enhanced heat exchange chamber through the quenching system; and the temperature recovery jacket generates a temperature recovery measurement action between the jacket and the enhanced heat exchange chamber through the return water capillary tube. The temperature recovery measurement action is used to recover the quenching medium after heat exchange and to obtain the temperature value of the quenching medium in the temperature recovery jacket.

[0008] Further configuration: the soft heat exchange chamber is filled with gas, the external sleeve is connected to a temperature-regulating return gas pipe corresponding to the soft heat exchange chamber, the outside of the quenching channel is provided with a heat-insulating gasket for isolating the soft heat exchange chamber, and a dynamic temperature difference control system is established through the soft heat exchange chamber and the temperature-regulating return gas pipe to establish a correlation between the instantaneous quenching action and the actual temperature recovery action.

[0009] Further configuration: In the dynamic temperature difference control system, the real-time mold temperature at the corresponding external sleeve of the mold body is obtained by an infrared temperature measurement structure, and the extreme low temperature value of the quenching medium injected into the quenching channel by the quenching system is directly obtained.

[0010] Further settings include: in the dynamic temperature difference control system, acquiring the temperature threshold Ti of the molten liquid inside the cavity, obtaining the dynamic air temperature Tni in the soft heat exchange chamber through the temperature-regulating return gas pipe, and the peak temperature Tfi of the strong cooling medium inside the return jacket, and setting the following heat exchange process:

[0011] Heat exchange method 1: The mold body and the molten liquid inside the cavity undergo an indirect heat exchange process, and the temperature of the mold body rises.

[0012] Heat exchange method 2: The strong cooling medium located inside the enhanced heat exchange chamber undergoes an indirect heat exchange process with the molten liquid inside the cavity. The temperature of the strong cooling medium rises rapidly while the temperature of the molten liquid inside the cavity decreases.

[0013] Heat exchange method 3: The mold body and the gas in the soft heat exchange chamber undergo an indirect heat exchange process, and the gas temperature in the soft heat exchange chamber rises.

[0014] Heat exchange method four: Based on heat exchange method three, the strong cooling medium recovered from the enhanced heat exchange chamber undergoes an indirect heat exchange process with the gas in the soft heat exchange chamber, and the temperature of the strong cooling medium and the gas temperature in the soft heat exchange chamber fluctuate.

[0015] Further settings include: establishing heat exchange formulas for heat exchange modes one through three, and using these formulas to establish a simulated heat exchange formula for heat exchange mode four, expressed as α*|T1-Tfi|=β*|Tni-Tpi|, where α and β represent constant factors for heat exchange of the strong cooling medium and gas, and Tpi represents the ambient temperature value in the soft heat exchange chamber actively changed by the temperature-regulating return gas pipe. The return temperature peak Tfi is used as a reference object to provide feedback on the heat exchange process between the strong cooling medium and the molten liquid in the cavity, as well as the heat exchange process of the strong cooling medium on the mold body.

[0016] The present invention has the following beneficial effects:

[0017] 1. Based on the quenching system in the die-casting mold, the technical problem mentioned in this invention is mainly aimed at the temperature change of the die-casting mold itself. Considering the solid-liquid heat exchange process between the molten liquid in the cavity and the mold body, as well as the liquid-liquid heat exchange process between the strong cooling medium and the molten liquid in the cavity, a soft heat exchange chamber is formed on the basis of an external sleeve without affecting the normal operation of the quenching system. Only a gas with low heat transfer efficiency exists in the chamber, which initially reduces the indirect heat exchange process between the mold body and the quenching channel.

[0018] 2. The key internal feature of this invention is: the ambient temperature in the soft heat exchange chamber is detected and actively changed in real time by the temperature-regulating return gas pipe. After indirect heat exchange, the strong cooling medium undergoes a gas-liquid indirect process with the gas inside the soft heat exchange chamber. By actively changing the temperature change in the soft heat exchange chamber, the temperature change process of the mold body is limited. This dynamic temperature difference active control method uses only the return temperature peak as a reference for global temperature control. The purpose is to avoid irreversible thermal stress damage caused by a large temperature difference in the mold itself during the quenching process, without affecting the normal operation of the quenching system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the intelligent temperature control device for die casting molds with a local quenching system proposed in this invention.

[0021] Figure 2 This is a schematic diagram of the external sleeve in this invention;

[0022] Figure 3 This is a cross-sectional view of the external sleeve in this invention;

[0023] Figure 4 In this invention Figure 2 A sectional view.

[0024] In the diagram: 1. Mold body; 2. Warming jacket; 3. External sleeve; 4. Temperature regulating return gas pipe; 5. Soft heat exchange chamber; 6. Return water capillary tube; 7. Quenching channel; 8. Enhanced heat exchange chamber. Detailed Implementation

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1: This invention proposes an optimization scheme for the temperature control of the quenching system in die-casting molds. The aim is to avoid affecting product molding quality due to excessive temperature difference between the medium and the mold, or excessively rapid quenching. The present invention offers a solution to this problem:

[0027] Reference Figures 1-4 In this embodiment, the intelligent temperature control device for die casting mold with local quenching system is applied in the mold body 1 of the die casting mold and uses an infrared temperature measurement structure and a quenching system. The mold body 1 is provided with an external sleeve 3 at the external position of its internal cavity. The bottom position of the external sleeve 3 is provided with an enhanced heat exchange chamber 8, and a quenching channel 7 connected to the enhanced heat exchange chamber 8 is provided at the center point of the external sleeve 3.

[0028] The external sleeve 3 is configured as a soft heat exchange chamber 5 at the inner position of the outer wall of the quench channel 7. The enhanced heat exchange chamber 8 is in indirect contact with the inner cavity of the mold body 1. The soft heat exchange chamber 5 is in indirect contact with the mold body 1. A return sleeve 2 is provided at one end of the external sleeve 3. The return sleeve 2 is configured with multiple return water capillary tubes 6 that penetrate the soft heat exchange chamber 5 corresponding to the enhanced heat exchange chamber 8.

[0029] The quenching system generates an instantaneous quenching action through the quenching channel 7 and the enhanced heat exchange chamber 8. During the instantaneous quenching action, the quenching medium is injected into the enhanced heat exchange chamber 8 through the quenching system. The temperature recovery jacket 2 generates a temperature recovery measurement action between the temperature recovery jacket 2 and the enhanced heat exchange chamber 8 through the return water capillary tube 6. The temperature recovery measurement action is used to recover the quenching medium after heat exchange and to obtain the temperature value of the quenching medium in the temperature recovery jacket 2.

[0030] Basic Principle: The first point to note about this invention is that it primarily addresses the temperature control process of the mold body 1, specifically for die-casting molds equipped with a quenching system. Because die-casting mold specifications and cavity structures are not standardized, this invention will not elaborate on this aspect but will refer to... Figure 1 Explanation:

[0031] The essence of a quenching system is to apply a strong cooling medium (such as liquid nitrogen) to the cavity location indirectly or directly to achieve rapid heat exchange. This invention adopts an indirect heat exchange method, using an external sleeve 3 as an additional structure of the quenching system. Specifically, the purpose of limiting the external sleeve 3 is based on the cavity structure, which is manifested as follows:

[0032] An external sleeve 3 is provided on the outside of the mold body 1 in a region with a more complex structure within the cavity. Therefore, the number and position of the external sleeves 3 in this invention are not limited. The key reference is... Figure 4 The quenching medium is injected into the enhanced heat exchange chamber 8 through the quenching channel 7. The quenching medium and the molten liquid in the cavity complete rapid heat exchange. This part is the basic principle of the quenching system.

[0033] Considering the natural heat dissipation process of the molten metal in the cavity, the mold body 1 also absorbs heat. However, considering the complexity of the cavity structure affecting the heat transfer effect, the temperature of the mold body 1 fluctuates. This invention specifically uses an infrared temperature measurement structure for real-time detection, specifically targeting the mold temperature at the location of the external sleeve 3. This also needs to be explained in conjunction with the quenching system.

[0034] After the cooling medium is injected into the enhanced heat exchange chamber 8, indirect heat exchange will also occur between it and the mold body 1. If the mold body 1 experiences strong temperature fluctuations, it will also cause irreversible thermal stress damage to the mold body 1. To address this, the present invention is based on the external sleeve 3 for improvement:

[0035] Firstly, there is a clear soft heat exchange chamber 5 between the cooling channel 7 and the outer sleeve 3. The lower end of the outer sleeve 3 is closest to the cavity structure, while the outer sleeve 3 is in direct contact with the mold body 1. Therefore, during the natural heat dissipation process, the mold body 1 generates high temperature due to the heat transfer process of the molten liquid inside the cavity. Essentially, it is only necessary to enhance the strong cooling medium in the heat exchange chamber 8 for rapid heat exchange.

[0036] To address this, a soft heat exchange chamber 5 is used as a "separation layer" between the quenching channel 7 and the mold body 1 to prevent direct heat exchange between the mold body 1 and the quenching channel 7. The soft heat exchange chamber 5 contains only gas, and the heat transfer efficiency of the gas is relatively low. In addition, the quenching channel 7 is also wrapped with a heat insulation gasket. The key purpose is to reduce the degree of heat exchange between the soft heat exchange chamber 5 and the strong cooling medium inside the quenching channel 7, thereby avoiding a strong heat exchange process between the strong cooling medium and the mold body 1.

[0037] Example 2: Supplementary explanation of the instantaneous cooling and reheating actions measured in Example 1:

[0038] The soft heat exchange chamber 5 is filled with gas, and the external sleeve 3 is connected to the corresponding temperature-regulating return gas pipe 4 of the soft heat exchange chamber 5. The outside of the quenching channel 7 is equipped with a heat-insulating gasket to isolate the soft heat exchange chamber 5. A dynamic temperature difference control system is established through the soft heat exchange chamber 5 and the temperature-regulating return gas pipe 4 to link the instantaneous quenching action and the actual temperature recovery action. In the dynamic temperature difference control system, the real-time mold temperature at the corresponding external sleeve 3 of the mold body 1 is obtained by an infrared temperature measurement structure, and the extreme low temperature value of the quenching medium injected into the quenching channel 7 by the quenching system is directly obtained.

[0039] Solution Description: Please refer to the following again. Figure 4 To explain, the soft heat exchange chamber 5 contains only gas. Therefore, a temperature-regulating return gas pipe 4 is installed on its exterior to monitor the ambient temperature inside the soft heat exchange chamber 5 in real time and to actively adjust the ambient temperature inside the soft heat exchange chamber 5. Secondly, a temperature recovery sleeve 2 is added. The temperature recovery sleeve 2 is mainly used to recover the strong cooling medium after heat exchange in the enhanced heat exchange chamber 8.

[0040] The return water capillary tube 6 serves as a return pipeline structure for the strong cooling medium and is also located in the soft heat exchange chamber 5, where it indirectly exchanges heat with the gas. Furthermore, it acquires the real-time temperature of the return jacket 2 to provide feedback on the temperature of the strong cooling medium after heat exchange. Therefore, the overall structure can be understood to have the following heat exchange process:

[0041] Heat exchange method 1: The mold body 1 undergoes an indirect heat exchange process with the molten liquid inside the cavity, and the temperature of the mold body 1 rises.

[0042] Heat exchange method 2: The strong cooling medium located inside the enhanced heat exchange chamber 8 undergoes an indirect heat exchange process with the molten liquid inside the cavity. The temperature of the strong cooling medium rises rapidly while the temperature of the molten liquid inside the cavity decreases.

[0043] Heat exchange method 3: The mold body 1 and the gas in the soft heat exchange chamber 5 undergo an indirect heat exchange process, and the gas temperature in the soft heat exchange chamber 5 rises.

[0044] Heat exchange method four: Based on heat exchange method three, the strong cooling medium recovered from the enhanced heat exchange chamber 8 undergoes an indirect heat exchange process with the gas in the soft heat exchange chamber 5, and the temperature of the strong cooling medium and the gas in the soft heat exchange chamber 5 fluctuate.

[0045] Based on the above, heat exchange method 1 and heat exchange method 2 have the highest heat transfer efficiency, followed by heat exchange method 4, while heat exchange method 3 has the lowest heat transfer efficiency.

[0046] Example 3: This example specifically describes the dynamic temperature difference control system in Example 2:

[0047] This invention prioritizes the temperature of the mold body 1 and also requires meeting the quenching requirements. To this end, the dynamic temperature difference control system first acquires the extreme low temperature value To when the cooling medium begins to be injected into the enhanced heat exchange chamber 8, the temperature threshold Ti of the molten liquid inside the cavity, and the real-time mold temperature Tt of the mold body 1 obtained through an infrared temperature measurement structure. The extreme low temperature value To and the temperature threshold Ti are constants, while the real-time mold temperature Tt is specifically determined based on the temperature threshold Ti. Therefore, the real-time mold temperature Tt is set as a relative constant. The key point is:

[0048] The dynamic air temperature Tni in the soft heat exchange chamber 5 and the return temperature peak Tfi of the strong cooling medium inside the return sleeve 2 are obtained through the temperature-controlled return gas pipe 4. The dynamic air temperature Tni and the return temperature peak Tfi are variable values. As shown in Example 2, the dynamic air temperature Tni and the return temperature peak Tfi are related to each other. Specifically, the return temperature peak Tfi is due to heat exchange between the strong cooling medium and the molten liquid inside the cavity, and also due to heat exchange with the gas in the soft heat exchange chamber 5. The dynamic air temperature Tni is also affected by multiple parameters, including the real-time mold temperature Tt, the extreme low temperature value To, and the temperature threshold Ti.

[0049] Based on the principle of indirect heat transfer between liquids, the heat transfer formula between the cooling medium and the molten liquid in the mold cavity is generated as follows: Q t =K*A*(T1) - T o ), where Q t The formula represents the heat absorbed by the cooling medium after receiving the molten liquid, K represents the heat transfer coefficient of the cooling medium, A represents the total heat exchange area of ​​the enhanced heat exchange chamber 8, and T1 represents the temperature value of the cooling medium after heat exchange. The process is specifically represented by the heat exchange formula in heat exchange method two, and the heat exchange formula is generated for heat exchange method one based on the principle of metal contact heat exchange. Since it only represents the contact heat exchange process between the molten liquid and the mold body, without considering external factors (natural heat dissipation affected by the external environment), the real-time mold temperature Tt of the mold body 1 is only related to the temperature threshold Ti. Therefore, Tt = X1 * Ti is generated, where X1 represents a constant factor and X1 < 1. The real-time mold temperature Tt can be obtained in real time through an infrared temperature measurement structure.

[0050] Secondly, the heat transfer process of the mold body 1 through the outer sleeve 3 will heat the gas in the soft heat exchange chamber 5. Its heating efficiency is relatively low, and the interior of the soft heat exchange chamber 5 is in a relatively closed state, and the heat exchange formula in the associated heat exchange mode 3 is generated: dynamic temperature Tni=X2*Tt, where X2 is also a constant factor and X1<1.

[0051] The key lies in heat exchange method four, because the temperature T1 of the cooling medium after the enhanced heat exchange chamber can be calculated. T represents the heat released when the temperature of the molten metal in the cavity drops from Ti to a specified value. Specifically, the temperature requirement of the molten metal in the cavity can be marked by the process parameters. Let Ta represent the temperature of the molten metal in the cavity after rapid cooling by the quenching system, and then further calculate Q. t Thus, T1 is obtained. In heat exchange mode four, the initial temperature of the strong cooling medium before indirect heat exchange with the gas inside the soft heat exchange chamber 5 is T1. Furthermore, the heat exchange process of the strong cooling medium in the soft heat exchange chamber 5 is simulated by combining the return temperature peak Tfi, dynamic air temperature Tni and T1.

[0052] Essentially, the mold body 1 transfers heat to the external sleeve 3, which can slightly change the ambient temperature in the soft heat exchange chamber 5. However, in this embodiment, the ambient temperature in the soft heat exchange chamber 5 is actively changed by the temperature-regulating return gas pipe 4. If a heating unit is provided in the temperature-regulating return gas pipe 4, the simulated heat exchange formula in this heat exchange method four is expressed as: α*|T1-Tfi|=β*|Tni-Tpi|, where α and β represent constant factors in the heat exchange process of the strong cooling medium and the gas, respectively. Taking the strong cooling medium as an example, it is specifically expressed as the flow rate of the strong cooling medium through the return water capillary 6 and the specific heat capacity of the strong cooling medium.

[0053] The key is that Tpi represents the ambient temperature value in the soft heat exchange chamber 5 that is actively changed by the temperature control return pipe 4. The specific principle is as follows: First, avoid the strong cooling medium from causing high temperature fluctuations in the mold body 1. Specifically, the return temperature peak Tfi is used as a reference object to provide feedback on the heat exchange process between the strong cooling medium and the melt in the cavity, as well as the heat exchange process of the strong cooling medium on the mold body 1.

[0054] In summary, based on the quenching system in die-casting molds, improvements are made specifically to mold temperature control. The temperature control process mainly focuses on the localized locations of the quenching system on the mold body. It is based on the indirect heat exchange between the cooling medium and the molten metal in the cavity, using gas as a "soft heat transfer medium." This includes three indirect heat exchange processes: liquid-liquid, solid-gas-liquid, and gas-liquid. Without affecting the instantaneous quenching of the localized cavity by the quenching system, the temperature change of the mold body is limited by actively changing the temperature change in the soft heat exchange chamber. The purpose is to avoid irreversible thermal stress damage caused by large temperature differences in the mold itself during the quenching process. The overall process is mainly based on dynamic temperature difference control, with the peak temperature as the reference for global temperature control.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A die-casting mold temperature intelligent control device with a local quenching system, characterized in that, The mold body (1) used in die casting molds uses an infrared temperature measurement structure and a quenching system. The mold body (1) is provided with an external sleeve (3) at the external position of its internal cavity. The bottom position of the external sleeve (3) is provided with an enhanced heat exchange chamber (8), and the center point of the external sleeve (3) is provided with a quenching channel (7) connected to the enhanced heat exchange chamber (8). The external sleeve (3) is configured as a soft heat exchange chamber (5) at the inner position of the outer wall of the quenching channel (7). The enhanced heat exchange chamber (8) is in indirect contact with the cavity position inside the mold body (1). The soft heat exchange chamber (5) is in indirect contact with the mold body (1). A return sleeve (2) is provided at one end of the external sleeve (3). The return sleeve (2) is provided with multiple return water capillaries (6) that penetrate the soft heat exchange chamber (5) corresponding to the enhanced heat exchange chamber (8). The soft heat exchange chamber (5) is filled with gas. The external sleeve (3) is connected to a temperature-regulating return gas pipe (4) corresponding to the soft heat exchange chamber (5). A heat insulation gasket is provided outside the quenching channel to isolate the soft heat exchange chamber (5). A dynamic temperature difference control system is established by the soft heat exchange chamber (5) and the temperature-regulating return gas pipe (4) to link the instantaneous quenching action and the actual temperature recovery action.

2. The intelligent temperature control device for die casting molds with a local quenching system according to claim 1, characterized in that, The quenching system generates an instantaneous quenching action through the quenching channel (7) and the enhanced heat exchange chamber (8). During the instantaneous quenching action, the quenching system injects quenching medium into the enhanced heat exchange chamber (8). The temperature recovery jacket (2) generates a temperature recovery measurement action between the temperature recovery jacket (2) and the enhanced heat exchange chamber (8) through the return water capillary tube (6). The temperature recovery measurement action is used to recover the quenching medium after heat exchange and obtain the temperature value of the quenching medium in the temperature recovery jacket (2).

3. The intelligent temperature control device for die casting molds with a local quenching system according to claim 1, characterized in that, In the dynamic temperature difference control system, the real-time mold temperature Tt at the corresponding external sleeve (3) of the mold body (1) is obtained by infrared temperature measurement structure, and the extreme low temperature value To of the quenching medium injected into the quenching channel (7) by the quenching system is directly obtained.

4. The intelligent temperature control device for die casting molds with a local quenching system according to claim 3, characterized in that, In the dynamic temperature difference control system, the temperature threshold Ti of the melt inside the cavity is obtained, the dynamic air temperature Tni in the soft heat exchange chamber (5) is obtained through the temperature regulating return gas pipe (4), and the return temperature peak Tfi of the strong cooling medium inside the return jacket (2) is obtained, and the following heat exchange process is set: Heat exchange method 1: The mold body (1) undergoes an indirect heat exchange process with the molten liquid inside the cavity, and the temperature of the mold body (1) rises. Heat exchange method 2: The strong cooling medium located inside the enhanced heat exchange chamber (8) undergoes an indirect heat exchange process with the molten liquid inside the cavity. The temperature of the strong cooling medium rises rapidly and the molten liquid inside the cavity decreases. Heat exchange method three: The gas in the mold body (1) and the soft heat exchange chamber (5) undergoes an indirect heat exchange process, and the gas temperature in the soft heat exchange chamber (5) rises. Heat exchange method four: Based on heat exchange method three, the strong cooling medium recovered from the enhanced heat exchange chamber (8) undergoes an indirect heat exchange process with the gas in the soft heat exchange chamber (5), and the temperature of the strong cooling medium and the gas temperature in the soft heat exchange chamber (5) fluctuate.

5. The intelligent temperature control device for die casting molds with a local quenching system according to claim 4, characterized in that, Establish heat transfer formulas for heat transfer modes one through three, and use these formulas to establish a simulated heat transfer formula for heat transfer mode four, expressed as follows: , The constant factor representing heat transfer in strongly cooled media and gases. The temperature return pipe (4) actively changes the ambient temperature value in the soft heat exchange chamber (5), with the return temperature peak Tfi as the reference object, and is used to feed back the heat exchange process between the strong cooling medium and the molten liquid in the cavity and the heat exchange process of the strong cooling medium on the mold body (1).

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