Temperature control machine for multi-zone differential temperature heat treatment of die-casting mold

Abstract

The utility model relates to temperature control machine technical field, concretely relates to a kind of temperature control machine for die-casting die multi-region differential temperature heat treatment, including bottom plate, the upper end side of bottom plate is fixedly connected with mounting bracket, the side of mounting bracket is provided with control box, the inside fixedly connected with heating box of mounting bracket, the inside of heating box is provided with heating tank, the middle part of both ends of heating tank is fixedly connected with connecting shaft, heating tank is rotatably connected in the inside of heating box by connecting shaft, the inside middle part of heating tank is fixedly connected with baffle, the baffle is used to divide heating tank into two parts, the inner bottom surface middle part of mounting bracket is provided with heater, and the heater is used to heat the heat-conducting oil in the inside of heating tank.Compared with prior art, the present application solves the problem of waiting for a long time in the prior art when preheating different temperatures in different areas of the die-casting die for a short time.

Description

Technical Field

[0001] This utility model relates to the field of temperature control technology, and in particular to a temperature control machine for multi-zone differential temperature heat treatment of die-casting molds. Background Technology

[0002] Before being put into production, die-casting molds usually need to be preheated to ensure uniform temperature distribution during the die-casting process, thereby improving the forming quality and surface precision of the castings. Existing temperature controllers generally use heat transfer oil as the heat transfer medium. The heat transfer oil is heated by an internal heating device and then delivered to each heating channel of the mold to achieve overall temperature rise and heat preservation control of the mold. As the requirements for mold temperature control accuracy in the die-casting process continue to increase, the multi-zone temperature difference control capability of the temperature controller during the mold preheating stage has become an important factor affecting product quality and production efficiency.

[0003] In traditional temperature controllers, the internal heat transfer oil heating system is usually set up for a single, uniform heating zone, ensuring a consistent output temperature for the heat transfer oil. However, different areas of a die-casting mold often have different temperature requirements. For example, the cavity area, gate area, or cooling area require different heat transfer oil temperatures. After the temperature controller has completed heating and circulating the heat transfer oil in a high-temperature area, if it needs to immediately supply oil to another lower-temperature area, it is necessary to activate the cooling device to quickly cool down the internal heat transfer oil. Conversely, when switching from a low-temperature to a high-temperature area, reheating is required. This process often requires a long temperature adjustment time, leading to reduced production efficiency. Existing technologies also include solutions that achieve multi-temperature zone control by setting up two independent heating and circulation systems inside the temperature controller. However, this structure not only increases the manufacturing and maintenance costs of the equipment but also increases the risk of failure. The overall structure is complex and not conducive to widespread application in industrial settings.

[0004] Furthermore, we disclose a temperature controller for multi-zone differential temperature heat treatment of die-casting molds to meet the practical needs of existing technologies that require a long waiting time when preheating different areas of die-casting molds at different temperatures in a short period of time. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a temperature controller for multi-zone differential temperature heat treatment of die casting molds, so as to solve the problem that in the prior art, it is necessary to wait a long time when preheating different areas of die casting molds at different temperatures in a short period of time.

[0006] To achieve the above objectives, this utility model provides a temperature controller for multi-zone differential temperature heat treatment of die-casting molds, comprising a base plate, a mounting frame fixedly connected to one side of the upper end of the base plate, a control box disposed on one side of the mounting frame, a heating box fixedly connected inside the mounting frame, a heating tank disposed inside the heating box, connecting shafts fixedly connected to the middle of both ends of the heating tank, the heating tank being rotatably connected to the inside of the heating box via the connecting shafts, a partition fixedly connected to the middle of the inner part of the heating tank, the partition dividing the interior of the heating tank into upper and lower parts, a heater disposed in the middle of the inner bottom surface of the mounting frame, the heater being used to heat the heat transfer oil inside the heating tank, and cooling grooves disposed at the upper and lower ends of the inner wall of the heating tank, the two cooling grooves being independently... The heating tank is not connected to the heating box. A drive module is provided on one side of the heating box. The drive module is used to drive the heating tank to rotate. A circular plate is provided on the side of the heating tank away from the drive module. The upper and lower ends of the outer wall of the circular plate are fixedly connected to the first mounting plate. The circular plate is fixedly connected to the heating box through the first mounting plate. An annular groove is opened on the side of the circular plate near the heating tank. Oil drain pipes are fixedly connected to the upper and lower ends of the side end face of the heating tank near the circular plate. The two oil drain pipes are respectively connected to the upper and lower areas inside the heating tank. The ends of the two oil drain pipes away from the heating tank extend into the interior of the annular groove. A second through hole is opened at the lower end of the annular groove. An oil delivery pipe is fixedly connected to the lower end of the side end face of the circular plate. The oil delivery pipe is connected to the oil drain pipe located at the lower end through the second through hole.

[0007] Preferably, the drive module includes a toothed pulley structure, which includes two toothed pulleys and a toothed belt sleeved on the outside of them. One of the toothed pulleys is fixedly connected to the outside of the connecting shaft, and the other toothed pulley is coaxially fixedly connected to a rotating rod. One end of the rotating rod is fixedly connected to a support, and the rotating rod is supported by the support and can rotate. The lower end of the support is fixedly connected to a mounting bracket, and a crank is provided on the side of the rotating rod away from the support.

[0008] Preferably, a limiting module is provided on the circular plate. The limiting module includes a connecting plate. The connecting shaft on the side away from the toothed pulley structure passes through the circular plate and is fixedly connected to the connecting plate. Both ends of the connecting plate are slidably connected to insert rods. A connecting plate is fixedly connected to the outer wall of the end face of the insert rod near the circular plate.

[0009] Preferably, a telescopic spring is fixedly connected to one end face of the connecting plate near the connecting plate, and the telescopic spring is sleeved on the outside of the insert rod and one end is fixedly connected to the annular groove.

[0010] Preferably, the circular plate has four grooves evenly spaced on one end face near the annular groove, and the corners of the grooves are rounded.

[0011] Preferably, the end of the insertion rod near the circular plate is spherical, and the spherical end of the insertion rod is located inside the groove.

[0012] Preferably, liquid flow pipes are fixedly connected to both the upper and lower ends of the outer wall of the heating tank, and the two liquid flow pipes on the same side are connected to the cooling tank on the same side. U-shaped ring blocks are fitted on both sides of the outer wall of the heating tank, and the two liquid flow pipes at the upper and lower ends of both sides are located inside the U-shaped ring blocks. A second mounting plate is fixedly connected to one end of the U-shaped ring block, and one end of the second mounting plate is fixedly connected to the heating box.

[0013] Preferably, the lower ends of the two U-shaped ring blocks are fixedly connected to coolant pipes, and the lower ends of the two U-shaped ring blocks are provided with first through holes corresponding to the positions of the coolant pipes. The liquid flow pipe is connected to the coolant pipe through the first through hole, and a condenser is provided in the middle of the upper surface of the base plate.

[0014] Preferably, the lower ends of the two coolant pipes are respectively connected to the condenser, and the two coolant pipes are used for the inlet and outlet of the condenser.

[0015] Preferably, an oil inlet pipe is fixedly connected to one side of both the upper and lower ends of the heating tank, and the oil inlet pipe is used to add heat transfer oil into the heating tank.

[0016] The beneficial effects of this utility model are: This multi-zone differential temperature heat treatment temperature controller for die-casting molds achieves rapid and precise differential temperature control, significantly improving production efficiency and product quality. Traditional temperature controllers, due to their single heating zone, require heating or cooling the entire system to switch temperatures, resulting in delayed temperature regulation and reduced production efficiency. This device divides the heating tank into two independent chambers by installing a partition inside, which can store and heat heat transfer oil at different temperatures separately. By rotating the heating tank through a drive module, the oil drain pipe of the corresponding chamber is quickly connected to the fixed oil delivery pipeline, achieving rapid switching between the two temperatures of heat transfer oil.

[0017] This temperature controller for multi-zone differential temperature heat treatment of die-casting molds uses an innovative design with a rotatable dual-chamber heating tank to replace two independent systems, achieving the integration of dual-temperature zone functions. This highly integrated design makes the equipment structure more compact, reduces the number of parts, and not only reduces the manufacturing cost and floor space of the equipment, but also simplifies the later maintenance process, reducing the risk of failure and maintenance costs caused by system complexity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 3 This is a partial three-dimensional structural diagram of the present invention; Figure 4 This is a three-dimensional structural diagram of the limiting module of this utility model; Figure 5 This is a partial three-dimensional internal structure diagram of the present invention.

[0020] The diagram is marked as follows: 1. Base plate; 2. Mounting bracket; 3. Heating box; 4. Control box; 5. Heating tank; 6. Condenser; 7. Oil supply pipe; 8. Baffle plate; 9. Oil inlet pipe; 10. Connecting shaft; 11. Toothed belt pulley structure; 12. Support; 13. Handle; 14. U-shaped ring block; 15. Oil drain pipe; 16. Circular plate; 17. Circular groove; 18. Insert rod; 19. Telescopic spring; 20. Connecting plate; 21. Groove; 22. First mounting plate; 23. Second mounting plate; 24. Cooling tank; 25. Coolant pipe; 26. Liquid flow pipe; 27. First through hole; 28. Second through hole; 29. ​​Heater; 30. Connecting plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figures 1 to 5 As shown, a temperature controller for multi-zone differential temperature heat treatment of die-casting molds includes a base plate 1. A mounting bracket 2 is fixedly connected to one side of the upper end of the base plate 1. A control box 4 is installed on one side of the mounting bracket 2. A heating box 3 is fixedly connected inside the mounting bracket 2. A heating tank 5 is installed inside the heating box 3. Connecting shafts 10 are fixedly connected to the middle of both ends of the heating tank 5. The heating tank 5 is rotatably connected to the inside of the heating box 3 through the connecting shafts 10. A partition 8 is fixedly connected to the middle of the inside of the heating tank 5, which divides the inside of the heating tank 5 into upper and lower parts. A heater 29 is installed in the middle of the inner bottom surface of the mounting bracket 2. The heater 29 is used to heat the heat transfer oil inside the heating tank 5. Cooling grooves 24 are provided at the upper and lower ends of the inner wall of the heating tank 5. The two cooling grooves 24 are independent and not connected. A drive module is installed on one side of the heating box 3. The drive module is used to drive the heating tank 5 into the heating box 3. As the heating tank 5 rotates, a circular plate 16 is provided on the side away from the drive module. The upper and lower ends of the outer wall of the circular plate 16 are fixedly connected to the first mounting plate 22. The circular plate 16 is fixedly connected to the heating box 3 through the first mounting plate 22. An annular groove 17 is opened on the side of the circular plate 16 near the heating tank 5. The upper and lower ends of the side end face of the heating tank 5 near the circular plate 16 are fixedly connected to the oil drain pipe 15. The two oil drain pipes 15 are respectively connected to the upper and lower areas inside the heating tank 5. The ends of the two oil drain pipes 15 away from the heating tank 5 extend into the interior of the annular groove 17. A second through hole 28 is opened at the lower end of the annular groove 17. An oil supply pipe 7 is fixedly connected to the lower end of one side end face of the circular plate 16. The oil supply pipe 7 is connected to the oil drain pipe 15 located at the lower end through the second through hole 28. An oil inlet pipe 9 is fixedly connected to the upper and lower ends of the heating tank 5. The oil inlet pipe 9 is used to add heat transfer oil to the interior of the heating tank 5. Before operation, heat transfer oil is first added to the upper and lower independent chambers of the heating tank 5, which are separated by the partition plate 8, through two oil inlet pipes 9. The heater 29 is started. According to the preset process requirements, it is usually set by the PLC controller in the control box 4 to heat the heat transfer oil in the upper and lower chambers separately and maintain them at two different target temperatures. For example, 300 degrees Celsius in the upper chamber is used for the mold gate system, and 200 degrees Celsius in the lower chamber is used for the cavity body. Temperature sensors installed on the inner wall of the heating tank 5 or on the oil drain pipe 15 will monitor the oil temperature of each chamber in real time and feed the signal back to the control system. The heating power is adjusted by actuators such as solenoid valves to achieve precise independent temperature control. When die casting production requires the supply of heat transfer oil to a certain high-temperature area of ​​the mold, the drive module is activated, which drives the connecting shaft 10 and the heating tank 5 to rotate through the toothed pulley structure 11. The rotation of the heating tank 5 causes one of the oil drain pipes 15 to align with the second through hole 28 at the bottom of the annular groove 17 on the fixed circular plate 16. At this time, the high-temperature heat transfer oil is driven by the pressure provided by the high-temperature oil pump installed in the oil supply pipe 7, flowing from the chamber through its oil drain pipe 15 into the annular groove 17, and then through the second through hole 28 into the oil supply pipe 7, and finally being delivered to the high-temperature demand area of ​​the mold. Conversely, when the process requirement is to switch to supply oil to another low-temperature area of ​​the mold, the heating tank 5 is driven to rotate about 180 degrees again, so that the low-temperature oil drain pipe 15 rotates to the bottom of the annular groove 17 and connects with the second through hole 28, thereby outputting low-temperature heat transfer oil. During this process, the flow sensor installed on the oil supply pipe 7 will monitor the output flow rate to ensure a stable supply. To achieve rapid cooling or precise temperature control of the mold, the device is also equipped with an independent cooling system: if it is necessary to cool the heat transfer oil in the lower chamber of the heating tank 5, the condenser 6 can be started. Driven by the cooling circulation pump, the coolant flows into the U-shaped ring block 14 through the coolant pipe 25 and enters the corresponding cooling tank 24 on the outer wall of the heating tank 5 through the liquid flow pipe 26, where it exchanges heat with the heat transfer oil in the chamber. The solenoid valve on the cooling pipeline opens or closes according to the feedback signal of the temperature sensor to adjust the coolant flow rate, thereby achieving rapid cooling on demand.

[0024] The device incorporates specialized sealing structures at key static and dynamic interfaces, such as the annular groove 17 of the fixed circular plate 16 and the U-shaped ring block 14, to ensure that heat transfer oil and coolant at different temperatures do not leak from the moving mating surfaces during the rotation of the heating tank 5. This guarantees long-term stable operation of the equipment and the independence of the dual temperature zones. Specifically, the annular groove 17 employs a dynamic sealing design: rectangular cross-section sealing grooves are opened in the groove walls at both its upper and lower ends, and high-strength, wear-resistant U-shaped or C-shaped metal plug seals are installed. The U-shaped ring block 14 employs a static sealing design: its inner side is sealed to the liquid flow... A concentric annular groove 21 is machined on the end face of the connecting pipe 26. An octagonal or elliptical metal ring gasket is installed within the groove. To achieve a reliable dynamic seal between the annular groove 17 and the rotating oil drain pipe 15, rectangular cross-section sealing grooves are formed in the upper and lower walls of the annular groove 17. The groove depth is preferably 1.2-1.5 times the diameter of the sealing element, and the groove width is 1.1-1.3 times the diameter. The metal plug seal preferably adopts a C-shaped structure with a stainless steel shell and a built-in Hastelloy spring. Its lip preload is set by the spring stiffness to ensure a contact pressure range of 0.5-2.0. Under MPa, it can work stably for a long time in a working temperature window of -20℃ to 350℃ and a system pressure of ≤1.0 MPa. The sealing lip material can be polytetrafluoroethylene composite material filled with glass fiber or graphite, or for higher temperature conditions, a combination of wave spring made of nickel-based alloy and soft metal lip can be used. The metal ring gasket at the interface of U-shaped ring block 14 is preferably octagonal in cross-section, and its initial compression rate is controlled at 15%-25%. The material can be 0Cr13 or 0Cr18Ni9 stainless steel to adapt to the corrosive environment of the coolant medium.

[0025] Furthermore, such as Figure 3 As shown, the drive module includes a toothed pulley structure 11, which includes two toothed pulleys and a toothed belt sleeved on its outside. One toothed pulley is fixedly connected to the outside of the connecting shaft 10, and the other toothed pulley is coaxially fixedly connected to a rotating rod. One end of the rotating rod is fixedly connected to a support 12. The rotating rod is supported by the support 12 and can rotate. The lower end of the support 12 is fixedly connected to the mounting bracket 2. A crank handle 13 is provided on the side of the rotating rod away from the support 12. When switching the output position of heating tank 5, the operator manually turns the crank handle 13, or the control system drives the motor to rotate the rotating rod. The rotation of the rotating rod drives the driven toothed pulley on it to rotate, and the power is transmitted to the driving toothed pulley through the toothed belt, thus ultimately driving the connecting shaft 10 and the heating tank 5 to rotate as a whole. The rotation angle of heating tank 5 is precisely controlled by the limit module. Usually, to switch from aligning one oil drain pipe 15 with the oil delivery pipe 7 to aligning with another oil drain pipe 15, heating tank 5 needs to rotate 180 degrees. The zero-slip characteristic of the gear transmission ensures the accuracy of the rotation angle. The end of the oil drain pipe 15 extends into the annular groove 17. The part is machined with a 15° guide cone angle to facilitate assembly and reduce initial wear. The radial clearance between the bottom surface of the annular groove 17 and the outer wall of the drain pipe 15 is designed to be 0.1-0.3mm. To ensure sealing effectiveness, the radial runout of the drain pipe 15 after installation should not exceed 0.1mm. The metal plug seal provides continuous wear compensation through the elastic characteristics of its built-in spring, ensuring that it can maintain an effective seal even when the wear of the sealing lip does not exceed 20% of the initial thickness. An adjustable packing gland structure can also be set, which further compensates for the wear caused by long-term operation by periodically adjusting the gland bolts to tighten the graphite packing ring.

[0026] Furthermore, such as Figure 4 As shown, a limiting module is provided on the circular plate 16. The limiting module includes a connecting plate 30. A connecting shaft 10 on the side away from the toothed pulley structure 11 passes through the circular plate 16 and is fixedly connected to the connecting plate 30. Both ends of the connecting plate 30 are slidably connected to the insert rods 18. A connecting plate 20 is fixedly connected to the outer wall of the end face of the insert rod 18 near the circular plate 16. A telescopic spring 19 is fixedly connected to the end face of the connecting plate 20 near the connecting plate 30. The telescopic spring 19 is sleeved on the outside of the insert rod 18 and one end is fixedly connected to the annular groove 17. Four grooves 21 are evenly spaced on the end face of the circular plate 16 near the annular groove 17. The corners of the grooves 21 are rounded. The end of the insert rod 18 near the circular plate 16 is spherical, and the spherical end of the insert rod 18 is located inside the groove 21. When the drive module rotates the connecting shaft 10, the connecting plate 30 rotates accordingly, causing the two insert rods 18 to move in a circular motion around the axis of the circular plate 16. During the rotation, the ball end face of the insert rod 18 is always pressed against the end face of the circular plate 16 under the preload of the telescopic spring 19. When the heating tank 5 rotates to the preset position, the ball end of the insert rod 18 is exactly aligned with the groove 21 on the circular plate 16. Under the strong thrust of the telescopic spring 19, the insert rod 18 quickly slides along its axis, causing its ball end to embed and lock into the inside of the groove 21. This embedding action produces a clear "click" sound and tactile feedback. Feedback is provided for manual operation and gives the system a clear mechanical position signal. The engagement of the insert rod 18 and the groove 21 effectively locks the circumferential position of the heating tank 5, preventing it from rotating under any external force interference, and ensuring the stability of the operation at this position. When it is necessary to switch positions again, the operator or drive motor needs to apply sufficient torque to overcome the preload of the telescopic spring 19 and the friction between the ball head and the groove 21, and pull the ball head of the insert rod 18 out of the current groove 21. After that, the ball head compresses the spring again and slides on the end face of the circular plate 16 until it reaches and is locked into the next target groove 21.

[0027] Furthermore, such as Figures 2 to 5 As shown, liquid flow pipes 26 are fixedly connected to both the upper and lower ends of the outer wall of the heating tank 5. The two liquid flow pipes 26 on the same side are connected to the cooling tank 24 on the same side. U-shaped ring blocks 14 are fitted on both sides of the outer wall of the heating tank 5. The two liquid flow pipes 26 on the upper and lower ends of both sides are located inside the U-shaped ring blocks 14. A second mounting plate 23 is fixedly connected to one end of the U-shaped ring block 14. One end of the second mounting plate 23 is fixedly connected to the heating box 3. Cooling liquid pipes 25 are fixedly connected to the lower ends of the two U-shaped ring blocks 14. A first through hole 27 is opened at the position of the cooling liquid pipe 25 at the lower end of the two U-shaped ring blocks 14. The liquid flow pipes 26 are connected to the cooling liquid pipes 25 through the first through hole 27. A condenser 6 is provided in the middle of the upper surface of the bottom plate 1. The lower ends of the two cooling liquid pipes 25 are respectively connected to the condenser 6. The two cooling liquid pipes 25 are respectively used for the liquid inlet and liquid outlet of the condenser 6. When cooling is required, the circulating water pump installed in the condenser 6 circuit starts (not shown in the figure, representing prior art). The cryogenic coolant (driven by the pump, not shown in the figure, representing prior art) flows out from the outlet of the condenser 6 and is pumped into the cavity of the corresponding U-shaped ring block 14 through one of the coolant pipes 25. The coolant passes through the first through hole 27 at the lower end of the U-shaped ring block 14. At this interface, a high-pressure quick-connect coupling or mechanical seal structure is used to achieve a sealed connection between the rotating pipe and the static ring block. The coolant flows through this hole into the liquid flow pipe 26 connected to the hole, and then enters the cooling tank 24 pre-embedded in the lower end of the outer wall of the heating tank 5. During the flow of the coolant in the cooling tank 24, it undergoes efficient heat exchange with the heat transfer oil in the cryogenic chamber, which is separated by only one wall. The coolant absorbs heat, and at the same time, temperature and flow sensors that can be installed on the coolant pipe 25 continuously monitor the inlet and outlet temperatures and flow rates of the coolant and feed the data back to the PLC controller to form a closed-loop control. The high-temperature coolant after absorbing heat flows out from the other end of the cooling tank 24 and returns to the cavity of the U-shaped ring block 14 through another liquid flow pipe 26 on the same side. The high-temperature coolant then flows into another coolant pipe 25 through another first through hole 27 on the U-shaped ring block 14 and finally returns to the condenser 6. In the condenser 6, the coolant dissipates the absorbed heat to the environment, cools down again, and enters the next cycle, thus forming a complete closed cooling loop. When the heating tank 5 rotates 180 degrees, the cooling pipe can cool another chamber.

[0028] The device also considers the safety and reliability of the equipment: a safety valve or rupture disc is installed on the top of the heating tank 5 or on the relevant pipeline. When the system pressure rises abnormally and exceeds the set value, such as 1.2 MPa, it can automatically release pressure. The control system integrates an over-temperature protection module. When the temperature sensor detects that the oil temperature exceeds the safety threshold, such as 350℃, the PLC will immediately cut off the power to the heater 29 and issue an alarm. In response to the risk that the heating tank 5 may stop at a non-preset position due to the failure of the drive module, the insertion rod 18 of the limit module always tends to press against the end face of the circular plate 16 under the action of the telescopic spring 19. Even if the power fails, the spring force can keep the insertion rod 18 in the nearest groove 21 or make it stick to the end face to generate huge friction force, forming a fault position holding mechanism, effectively preventing the medium leakage caused by partial alignment, and improving the safety performance of the equipment.

[0029] This temperature controller for multi-zone differential temperature heat treatment of die-casting molds is not simply about reducing the number of parts, but rather about fundamentally solving the technical bottlenecks inherent in the existing "two heating circuits + reversing valve" scheme, such as slow temperature switching response, high system energy consumption, and potential reliability risks caused by the coexistence of multiple independent circulation systems, through innovative structural design that integrates functions and coordinates actions.

[0030] Compared with the conventional solution of "two heating circuits + reversing valve", the significant differences and progress are reflected in: Functional integration and coordinated action achieve a leap in performance: Conventional "two heating circuits + reversing valve" solutions rely on the opening and closing of solenoid valves and the start and stop of two independent circulation systems for temperature switching. Essentially, this involves the alternating operation of two independent systems, resulting in significant switching delays and energy losses. This device employs a rotatable dual-chamber heating tank 5, highly integrating the storage, insulation, and output switching functions of two types of heat transfer oil into a single core component. Through a single rotation of the heating tank 5, both "oil circuit switching" and "output temperature selection" can be completed simultaneously. This mechanical, integrated switching represents a fundamental shift from "system switching" to "station switching," resulting in a qualitative leap in response speed. This meets the stringent requirements of high-speed die casting processes for rapid mold temperature response. The device effectively avoids the need for multiple heaters 29, circulation pumps, complex piping, numerous control valves, and their corresponding control circuits required by two independent heating circulation systems, transforming the system complexity from "distributed complexity of electrical control and fluid piping" to "centralized complexity of core component mechanical integration." The benefits of this transformation are obvious: Ease of maintenance: The core functions are integrated into the heating tank 5 assembly, making fault diagnosis and targeted maintenance clearer, eliminating the need to troubleshoot problems in the entire complex piping network.

[0031] Energy consumption optimization: It avoids the extra energy loss caused by maintaining the standby state of two independent systems, the heat energy is more concentrated, and the overall energy efficiency is higher.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0033] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds, characterized in that: Includes a base plate (1), with a mounting bracket (2) fixedly connected to one side of the upper end of the base plate (1). A control box (4) is provided on one side of the mounting bracket (2). A heating box (3) is fixedly connected inside the mounting bracket (2). A heating tank (5) is provided inside the heating box (3). A connecting shaft (10) is fixedly connected to the middle of both ends of the heating tank (5). The heating tank (5) is rotatably connected to the inside of the heating box (3) through the connecting shaft (10). A partition (8) is fixedly connected to the middle of the inner part of the heating tank (5). The partition (8) is used to divide the inside of the heating tank (5) into upper and lower parts. A heater (29) is provided in the middle of the inner bottom surface of the mounting bracket (2). The heater (29) is used to heat the heat transfer oil inside the heating tank (5). Cooling grooves (24) are provided at the upper and lower ends of the inner wall of the heating tank (5). The two cooling grooves (24) are independent and not connected. A drive module is provided on one side of the heating box (3). The drive module is used to drive the heating tank (5) to rotate. A circular plate (16) is provided on the side of the heating tank (5) away from the drive module. The upper and lower ends of the outer wall of the circular plate (16) are fixedly connected to the first mounting plate (22). The circular plate (16) is fixedly connected to the heating box (3) through the first mounting plate (22). An annular groove (17) is provided on the side of the circular plate (16) near the heating tank (5). The upper and lower ends of the side surface of the heating tank (5) near the circular plate (16) are fixedly connected to the first mounting plate (22). The two oil drain pipes (15) are connected to the upper and lower areas inside the heating tank (5) respectively. The ends of the two oil drain pipes (15) away from the heating tank (5) extend into the interior of the annular groove (17). The lower end of the annular groove (17) is provided with a second through hole (28). The lower end of one side face of the circular plate (16) is fixedly connected to an oil supply pipe (7). The oil supply pipe (7) is connected to the oil drain pipe (15) located at the lower end through the second through hole (28).

2. The temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 1, characterized in that: The drive module includes a toothed pulley structure (11), which includes two toothed pulleys and a toothed belt sleeved on its outside. One of the toothed pulleys is fixedly connected to the outside of the connecting shaft (10), and the other toothed pulley is coaxially fixedly connected to a rotating rod. One end of the rotating rod is fixedly connected to a support (12). The rotating rod is supported by the support (12) and can rotate. The lower end of the support (12) is fixedly connected to the mounting bracket (2). A crank (13) is provided on the side of the rotating rod away from the support (12).

3. The temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 2, characterized in that: A limiting module is provided on the circular plate (16). The limiting module includes a connecting plate (30). The connecting shaft (10) on the side away from the toothed pulley structure (11) passes through the circular plate (16) and is fixedly connected to the connecting plate (30). Both ends of the connecting plate (30) are slidably connected to the insert rod (18). The outer wall of the end face of the insert rod (18) near the circular plate (16) is fixedly connected to the connecting plate (20).

4. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 3, characterized in that: A telescopic spring (19) is fixedly connected to one end face of the connecting plate (20) near the connecting plate (30). The telescopic spring (19) is sleeved on the outside of the insert rod (18) and one end is fixedly connected to the annular groove (17).

5. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 4, characterized in that: The circular plate (16) has four grooves (21) evenly spaced on one end face near the annular groove (17), and the corners of the grooves (21) are rounded.

6. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 5, characterized in that: The end of the insert (18) near the circular plate (16) is spherical, and the spherical end of the insert (18) is located inside the groove (21).

7. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 1, characterized in that: Liquid flow pipes (26) are fixedly connected to both the upper and lower ends of the outer wall of the heating tank (5). The two liquid flow pipes (26) on the same side are connected to the cooling tank (24) on the same side. U-shaped ring blocks (14) are fitted on both sides of the outer wall of the heating tank (5). The two liquid flow pipes (26) on the upper and lower ends of both sides are located inside the U-shaped ring blocks (14). A second mounting plate (23) is fixedly connected to one end of the U-shaped ring block (14). One end of the second mounting plate (23) is fixedly connected to the heating box (3).

8. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 7, characterized in that: The lower ends of the two U-shaped ring blocks (14) are fixedly connected to coolant pipes (25). The lower ends of the two U-shaped ring blocks (14) are provided with first through holes (27) corresponding to the coolant pipes (25). The liquid flow pipe (26) is connected to the coolant pipe (25) through the first through hole (27). A condenser (6) is provided in the middle of the upper surface of the base plate (1).

9. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 8, characterized in that: The lower ends of the two coolant pipes (25) are respectively connected to the condenser (6), and the two coolant pipes (25) are respectively used for the inlet and outlet of the condenser (6).

10. A temperature controller for multi-zone differential temperature heat treatment of die-casting molds according to claim 1, characterized in that: The upper and lower ends of the heating tank (5) are both fixedly connected to an oil inlet pipe (9), which is used to add heat transfer oil into the heating tank (5).

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