Mold temperature controller capable of reducing temperature of oil tank

Abstract

The utility model discloses a mold temperature controller capable of reducing the temperature of an oil tank, the mold temperature controller comprises a circulating pump, a heat exchanger, a heater, a buffer tank and an expansion oil tank which are connected in series with a mold to form a circulating loop, the highest point of the heater is provided with an exhaust port, the buffer tank is arranged above the heater and is communicated with the exhaust port, and the expansion oil tank is communicated with the heat exchanger. The highest point of the buffer tank is provided with a gas-liquid discharge port, and an inlet of the expansion oil tank is communicated with the gas-liquid discharge port. The expansion oil tank is effectively prevented from being directly impacted by a large amount of high-temperature hot oil, so that the temperature of the expansion oil tank is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mold temperature controller technology, and in particular to a mold temperature controller that can reduce the temperature of the oil tank. Background Technology

[0002] Mold temperature controllers, also known as mold temperature control machines, are widely used in industries such as plastic molding, die casting, rubber tires, rollers, chemical reactors, bonding, and mixing. Based on the internal circulation medium, they can be divided into water temperature controllers and oil temperature controllers.

[0003] Traditional 320℃ mold temperature controllers for die casting use a high-temperature magnetic circulation pump to power the circulation medium within the piping system. This medium then passes through a resistance electric heater to raise its temperature to the maximum of 320℃. Before operation, air within the system piping must be vented to the expansion tank via a direct connection pipe. During the heating process, the heat transfer oil within the system also expands and is vented to the expansion tank via the same direct connection pipe. However, due to limitations in internal space and temperature limits, existing 320℃ mold temperature controllers for die casting typically use this vent pipe connected to the oil tank. The system performs exhaust operations, but as the system heats up to 320°C, the oil volume expands and is discharged directly into the oil tank through this pipe. This causes the oil tank temperature to rise continuously along with the system oil temperature, with the highest temperature in the oil tank even approaching the temperature of the heat transfer oil. Excessive oil temperature in the oil tank can lead to some safety hazards. Furthermore, heat transfer oil at high temperatures is also prone to oxidation and cracking reactions, producing acidic substances, colloids, and other impurities that corrode equipment, clog pipes, and reduce the thermal stability and performance of the oil. Prolonged high temperatures can also cause the oil tank to deform and the welds to crack.

[0004] To address the aforementioned issues, existing technologies generally employ slow heating and multiple drainage methods to minimize the amount of hot oil entering the oil tank. However, this approach can negatively impact the heating efficiency of the mold temperature controller, making it less than optimal. Consequently, existing technologies lack effective methods to address the problem of excessively high expansion tank temperatures. Utility Model Content

[0005] To address the problem in existing mold temperature controllers where circulating oil expands and enters the oil tank during the exhaust heating process, causing the oil temperature in the tank to become too high, this invention proposes a mold temperature controller that can reduce the oil tank temperature.

[0006] The technical solution adopted by the utility model is: a mold temperature controller that can reduce the temperature of the oil tank. The mold temperature controller includes a circulating pump, a heat exchanger, a heater, a buffer tank and an expansion oil tank connected in series with the mold to form a circulation loop. The highest point of the heater is provided with an exhaust port. The buffer tank is located above the heater and is connected to the exhaust port. The highest point of the buffer tank is provided with a gas-liquid discharge port. The inlet of the expansion oil tank is connected to the gas-liquid discharge port.

[0007] Furthermore, the outlet end of the circulating pump is connected to the mold, the outlet end of the mold is connected to the heat exchanger, the outlet end of the heat exchanger is connected to the heater, and the outlet end of the heater is connected to the inlet end of the circulating pump.

[0008] Furthermore, the circulating pump is a high-temperature magnetic circulating pump.

[0009] Furthermore, the expansion tank is provided with an oil return port at the bottom, and the heater is provided with a liquid replenishment port, which are connected to each other; the expansion tank is also provided with a vent at the top, which is connected to the inlet end of the circulation loop, and an air intake solenoid valve is also provided on the connecting pipe from the inlet end to the vent.

[0010] Furthermore, the mold temperature controller also includes a cooling circulation path, which includes a cooling water inlet and a cooling water outlet. The cooling water inlet is connected to the heat exchanger via a filter and a cooling solenoid valve, and the heat exchanger is connected to the cooling water outlet via a shut-off valve.

[0011] Furthermore, the expansion tank is also equipped with an oil filling port, a level switch, a level alarm device, and an overflow port.

[0012] Furthermore, the heat exchanger is also provided with an oil drain port.

[0013] Compared with the prior art, in the heating stage of the system, the circulating medium expands due to the increase in temperature. The excess heat transfer oil first accumulates in the buffer tank, which is located above the heater and connected to the exhaust port. The gas-liquid discharge port at its highest point is connected to the inlet of the expansion tank. This allows the expanded hot oil to slowly flow into the expansion tank only after filling the buffer tank. This process effectively avoids a large amount of high-temperature hot oil directly impacting the expansion tank, thereby reducing the temperature of the expansion tank. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the mold temperature controller in this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure of the mold temperature controller piping system in this utility model.

[0017] The main reference numerals in this application are:

[0018] 1. Circulating pump; 2. Heat exchanger; 3. Heater; 4. Buffer tank; 5. Expansion tank; 6. Control box; 7. Oil return port; 8. Liquid replenishment port; 9. Vent port; 10. Inlet end; 11. Inlet solenoid valve; 12. Cooling water inlet; 13. Cooling water outlet; 14. Filter; 15. Cooling solenoid valve; 16. Shut-off valve; 17. Oil filling port; 18. Liquid level switch; 19. Liquid level alarm device; 20. Overflow port; 21. Oil drain port. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] In the following description, reference is made to the accompanying drawings, which illustrate several embodiments of the present application. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical, and operation may be made without departing from the spirit and scope of this disclosure. The following detailed description should not be considered limiting, and the scope of the embodiments of the present application is defined only by the claims of the published patents. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present application. Spatially related terms, such as “upper,” “lower,” “left,” “right,” “below,” “below,” “lower part,” “above,” “upper part,” etc., may be used herein to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0021] The mold temperature controller disclosed in this utility model, in conjunction with the appendix Figure 1 , 2 As shown, the mold temperature controller mainly consists of core components such as a circulating pump 1, a heat exchanger 2, a heater 3, a buffer tank 4, and an expansion oil tank 5. These components are connected in series with the mold to form a closed and efficient circulation loop.

[0022] An exhaust port is carefully positioned at the highest point of the heater, and a buffer tank is installed directly above the heater, reliably connected to the exhaust port via a specific pipe. Notably, a gas-liquid discharge port is located at the highest point of the buffer tank, seamlessly connecting to the inlet of the expansion tank to ensure the orderly flow of gas and liquid within the system.

[0023] The expansion tank plays a crucial role in the entire system. It has a return port 7 at its bottom, and a corresponding replenishment port 8 for the heater. The return port 7 and replenishment port 8 are interconnected by a pipeline, forming a unique media circulation path. During system operation, this path automatically replenishes or balances the media distribution within the system according to actual operating conditions, ensuring the system remains in a stable operating state. For example, if the media in a certain part of the system becomes insufficient due to leakage or other reasons, the media in the expansion tank can be replenished to the corresponding part in a timely manner through the connection between the return port 7 and replenishment port 8, maintaining the normal circulation of the system. The expansion tank has a vent 9 at its top, which is connected to the inlet 10 of the circulation loop. An intake solenoid valve 11 is installed on the pipeline connecting the two. Through the precise control of this solenoid valve, the air pressure within the system can be adjusted to adapt to different operating conditions. During system operation, the gas pressure within the system changes accordingly with variations in temperature and pressure. Through precise control of the intake solenoid valve 11, gas can be added to or discharged from the system as needed, ensuring that the gas pressure remains within a safe and stable range. Furthermore, under certain special process requirements, this device can be used for specific intake operations, further expanding the system's application range. The expansion tank is also equipped with auxiliary facilities such as an oil inlet 17, a level switch 18, a level alarm device 19, and an overflow port 20. The oil inlet 17 facilitates the addition of oil to the expansion tank, ensuring sufficient heat transfer medium within the system. The level switch 18 and the level alarm device 19 monitor the changes in the tank's liquid level in real time. If an abnormality occurs, such as excessively high or low liquid levels, the level alarm device 19 will promptly issue an alarm, alerting the operator to take appropriate action. The overflow port 20 is a safety overflow channel designed to prevent excessive oil. When the oil level in the tank exceeds the safety limit, the excess oil can be discharged through the overflow port 20, effectively avoiding safety hazards and environmental pollution caused by oil overflow.

[0024] When the system enters the heating phase, the circulating medium expands in volume due to the increased temperature. At this time, excess heat transfer oil first accumulates in the buffer tank 4. The connection design between the buffer tank 4, the heater 3, and the expansion tank 5 is extremely ingenious. Because the buffer tank 4 is located above the heater and connected to the exhaust port, and its highest point's gas-liquid discharge port is connected to the inlet of the expansion tank 5, the expanded hot oil only flows slowly and orderly into the expansion tank 5 after filling the buffer tank 4. This design effectively avoids the direct impact of a large amount of high-temperature hot oil on the expansion tank 5, thereby significantly reducing the operating temperature of the expansion tank 5 and greatly improving the stability and reliability of the system.

[0025] The circulating pump employs advanced high-temperature magnetic circulation pump technology. During normal system operation, circulating pump 1 serves as the power source for the entire circulation loop, with its outlet end tightly connected to the mold. Upon startup, circulating pump 1 delivers the circulating medium to the mold at a stable flow rate and pressure, providing the necessary heat or cold support for mold temperature regulation. After the mold completes its heat exchange task, the circulating medium flowing out of the mold outlet immediately enters the heat exchanger 2 connected to the mold. Within the heat exchanger 2, the circulating medium efficiently exchanges heat with the cooling medium or other heat exchange media according to actual temperature control requirements, thereby adjusting its own temperature to a suitable operating range.

[0026] Next, the circulating medium, after initial heat exchange in heat exchanger 2, flows into heater 3, which is connected to the outlet of the heat exchanger. Heater 3 utilizes the principle of resistance heating to further precisely regulate the temperature of the circulating medium, ensuring it reaches the precise value required for mold temperature control. The heated circulating medium flows out from the outlet of heater 3. Since this outlet is connected to the inlet 10 of the circulating pump, the circulating medium returns to the circulating pump 1, thus forming a complete and efficient closed-loop circulation system, achieving a continuous and stable supply and recycling of heat.

[0027] During the initial venting phase of the equipment startup, the vent at the highest point of heater 3 plays a crucial role. Residual gas in the system pipeline rises through this vent to the vent buffer tank 4, which is located above and connected to it. Buffer tank 4 buffers and initially stores the gas, effectively preventing gas interference with normal system operation. Subsequently, the gas-liquid discharge port at the highest point of buffer tank 4 discharges the collected gas to the expansion tank 5, which is connected to its inlet, thus successfully completing the venting process during system startup and ensuring stable system operation without gas interference.

[0028] In addition, this mold temperature controller is equipped with an independent cooling circulation path. This path consists of a cooling water inlet 12 and a cooling water outlet 13, and its main function is to provide cooling for the entire system, ensuring that the system operates within a suitable temperature range. During the operation of the mold temperature controller, as heat is continuously transferred and accumulated, the temperature within the system may rise beyond the normal operating range. At this time, the cooling circulation path will activate, introducing cooling water to remove excess heat from the system and maintain the system temperature within a stable range. A filter 14 and a cooling solenoid valve 15 are sequentially installed on the pipe connecting the cooling water inlet 12 to the heat exchanger. The filter 14 effectively filters impurities in the cooling water, such as sediment and rust. If these impurities enter the heat exchanger, they may cause a decrease in heat exchange efficiency, pipe blockage, and other problems, affecting the normal operation of the system. The cooling solenoid valve 15 can flexibly control the flow of the cooling medium according to the actual needs of the system. When the system temperature is too high, the cooling solenoid valve 15 opens, allowing cooling water to flow into the heat exchanger and exchange heat with the circulating medium. When the system temperature reaches the set range, the cooling solenoid valve 15 closes, stopping the flow of the cooling medium, thus achieving precise control of the cooling process and improving energy efficiency. A shut-off valve 16 is installed on the pipeline connecting the heat exchanger to the cooling water outlet 13. This shut-off valve 16 can conveniently cut off or open the flow of cooling water during equipment maintenance and operation. For example, when cleaning, repairing, or replacing parts of the heat exchanger, the shut-off valve 16 can be closed to prevent the flow of cooling water, ensuring the safety and smooth progress of maintenance work. Simultaneously, during normal system operation, the shut-off valve 16 can also be used to regulate the flow rate of cooling water, further optimizing the cooling effect. The heat exchanger also has an oil drain port 21, mainly used to drain residual oil from the heat exchanger during equipment maintenance or component replacement, ensuring the smooth progress of maintenance work. When the heat exchanger needs to be repaired or replaced, the residual oil in the heat exchanger can be discharged through the oil drain port 21 to avoid the oil interfering with the repair work. At the same time, it is also beneficial to protect the environment and prevent oil leakage from polluting the surrounding environment.

[0029] As the core of the entire system, the control box 6 achieves comprehensive information interaction with various components through precise circuit connections. It can monitor the operating status of each component and key parameters such as the temperature and pressure of the circulating medium in real time. Based on this precise data, it uses advanced control algorithms to precisely control the cooling start-up timing of heat exchanger 2 and the heating start-up timing of heater 3, ensuring accurate and efficient temperature control of the entire system. Furthermore, the control box 6 has comprehensive safety protection functions, ensuring the safe and stable operation of the mold temperature controller system. Notably, the buffer tank 4, through its ingenious connection to the entire circulation loop, can promptly replenish the medium in the event of a temporary shortage, maintaining normal system operation and greatly improving the system's reliability and fault tolerance.

[0030] In summary, the mold temperature controller's system design has been carefully optimized, retaining not only the original temperature control and circulation functions but also adding a cooling function, as well as more comprehensive media management and safety features. Through the addition of new components and connections, the system's operability and maintainability have been significantly improved. These new components and connections work together within the existing system framework to ensure safe, stable, and efficient operation under various working conditions, providing reliable technical support for mold temperature control.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mold temperature controller capable of reducing oil tank temperature, characterized in that, The mold temperature controller comprises a circulating pump, a heat exchanger, a heater, a buffer tank and an expansion oil tank connected in series to form a circulating loop, the heater is provided with an exhaust port at the highest point, the buffer tank is arranged above the heater and communicates with the exhaust port, the buffer tank is provided with a gas-liquid discharge port at the highest point, and the inlet of the expansion oil tank communicates with the gas-liquid discharge port.

2. The mold temperature controller capable of reducing the temperature of the tank according to claim 1, wherein The outlet end of the circulating pump is connected with a mold, the outlet end of the mold is connected with the heat exchanger, the outlet end of the heat exchanger is connected with the heater, and the outlet end of the heater is connected with the inlet end of the circulating pump.

3. The mold temperature controller capable of reducing the temperature of the tank according to claim 1, wherein The circulating pump is a high-temperature magnetic circulating pump.

4. The mold temperature controller capable of reducing the temperature of the tank according to claim 1, wherein The bottom of the expansion oil tank is provided with an oil return port, the heater is provided with a liquid supplement port, the oil return port and the liquid supplement port are communicated, the top of the expansion oil tank is further provided with a gas discharge port, the gas discharge port is connected with the inlet end of the circulating loop, and an air inlet electromagnetic valve is further arranged on the connecting pipeline from the inlet end to the gas discharge port.

5. The mold temperature controller capable of reducing the temperature of the tank according to claim 1, wherein The mold temperature controller further comprises a cooling circulating flow path, the cooling circulating flow path comprises a cooling water inlet and a cooling water outlet, a filter and a cooling electromagnetic valve are arranged on the pipeline connecting the cooling water inlet with the heat exchanger, and a stop valve is arranged on the pipeline connecting the heat exchanger with the cooling water outlet.

6. The mold temperature controller capable of reducing the temperature of the tank according to claim 1, wherein The expansion oil tank is further provided with an oil injection port, a liquid level switch, a liquid level alarm device and an oil overflow port.

7. The mold temperature controller capable of reducing the temperature of the tank according to claim 1, wherein The heat exchanger is further provided with an oil discharge port.

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