Die-casting die water temperature machine system

Abstract

The utility model discloses a water temperature machine system for a die-casting die. The core is a temperature regulation circulation loop which is communicated with the water return end and the water outlet end of the mold, and a permanent magnet synchronous variable frequency pump, a heater, an expansion tank and a cooling device are connected in series in the loop. A pressure relief assembly on the expansion tank comprises a pressure relief flow path and an exhaust flow path which are connected in parallel and are connected with a discharge pipe together, and a loop is further communicated with a gas supplementing flow path and a water supplementing flow path. According to the system, the permanent magnet synchronous variable frequency pump is adopted, water circulation can be accurately, rapidly and stably output under the control of the frequency converter, and system water medium circulation pressure fluctuation caused by sudden change of the temperature of the mold is effectively counteracted. Meanwhile, gas and liquid are discharged in time through the pressure relief assembly, the gas and liquid pressure is adjusted through the gas supplementing flow path and the water supplementing flow path, the problem that pressure fluctuation of a large die in the die casting industry is too large is successfully solved, stable operation of a water temperature machine system is guaranteed, the service life of the water temperature machine system is prolonged, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold temperature controller technology, and in particular to a water temperature controller system for die casting molds. 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, adhesives, and mixing. Based on the internal circulation medium, they can be divided into water temperature controllers and oil temperature controllers.

[0003] However, in the field of integrated die casting, as the temperature balance requirements of molds become increasingly stringent and the production cycle time becomes shorter, existing oil temperature systems cannot meet the needs of large molds to quickly reach temperature balance. High-temperature water systems, on the other hand, utilize the high specific heat and good fluidity of water to perfectly solve the temperature balance problem of large molds.

[0004] The water system circulation specifically involves a circulating pump powering the circulation medium within the pipes. This medium then passes through an electric heating element, raising its temperature to a maximum of 180°C. However, due to the properties of water, its saturated vapor pressure reaches ≥1.0 MPa at 180°C. Since the water system is a variable system, the temperature fluctuations during operation cause variations in the mold, resulting in fluctuations in the system's water circulation output pressure. This not only reduces the lifespan of internal components but also lowers the mold cooling efficiency. Therefore, it is necessary to design a solution to address these issues. Utility Model Content

[0005] To address the problems of low service life and poor cooling efficiency caused by excessive pressure fluctuations in existing die-casting mold water temperature control systems, this utility model proposes a die-casting mold water temperature control system.

[0006] The technical solution adopted by the utility model is: a water temperature control system for die casting molds, comprising: a temperature regulating circulation loop, which includes a return water end and a water outlet end connected to the mold; the temperature regulating circulation loop includes a circulation pump, a heater, an expansion tank, and a cooling device connected in series; the expansion tank is provided with a pressure relief component; the pressure relief component includes a pressure relief flow path and an exhaust flow path connected in parallel with the expansion tank; the pressure relief flow path and the exhaust flow path are jointly connected to a discharge pipe; and the temperature regulating circulation loop is also connected to a make-up air flow path and a make-up water flow path.

[0007] Furthermore, a pressure relief valve is provided on the pressure relief flow path, an exhaust valve is provided on the exhaust flow path, and a pressure relief check valve is provided on the discharge pipe.

[0008] Furthermore, the temperature regulation loop is also equipped with a return water filter, a return water temperature sensor, and a safety valve located near the return water end; the temperature regulation loop is also equipped with an outlet water flow sensor, an outlet water pressure sensor, and an outlet water temperature sensor located near the outlet water end; the return water filter, return water temperature sensor, safety valve, outlet water flow sensor, outlet water pressure sensor, and outlet water temperature sensor are all connected to the control module for signal connection.

[0009] Furthermore, the circulating pump is connected to the mold, and a heating valve is provided on the connecting pipeline. The heating valve is connected to the mold through a water outlet pipe. The cooling device includes a heat exchanger connected in parallel with the heating valve. The heat exchanger includes a circulating water inlet, a circulating water outlet, a cooling water inlet, and a cooling water outlet. The circulating water inlet is connected to the circulating pump, and the circulating water outlet is connected to the water outlet pipe. A cooling valve is also provided on the pipeline connecting the circulating water outlet end to the water outlet pipe.

[0010] Furthermore, the supplementary airflow path is connected to the water outlet, and an air pressure regulating valve, an air source pressure sensor, an air blowing valve, and an air blowing check valve are sequentially provided on the flow path from the compressed air end to the water outlet.

[0011] Furthermore, the water replenishment path is connected to the inlet side of the circulating pump, and the water replenishment path is equipped with a water pressure sensor, a water replenishment filter, a booster pump, and a water replenishment check valve.

[0012] Furthermore, a bypass passage is connected between the return water end and the outlet water end.

[0013] Preferably, the circulating pump is a permanent magnet synchronous variable frequency pump.

[0014] Compared with existing technologies, this invention, under the control of a frequency converter, achieves precise, rapid, and stable water system circulation output, effectively mitigating pressure fluctuations caused by mold temperature variations. Furthermore, this invention incorporates a pressure relief component, a gas supply path, and a water supply path in the temperature regulation circulation loop. These components are deployed on the outside of the mold, allowing for immediate pressure regulation through the pressure relief component's release of gas and liquid. The addition of gas and water supply paths further facilitates rapid adjustment of the system's gas and liquid pressures, perfectly solving the problem of excessive pressure fluctuations in large die-casting molds and significantly improving the lifespan and cooling efficiency of the water temperature control system. This application further utilizes a permanent magnet synchronous frequency converter pump as the circulation pump, resulting in even more precise, rapid, and stable water system circulation output. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the connection structure of the water temperature controller system for die casting molds in this utility model.

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

[0018] 1. Booster pump; 2. Water supply valve; 3. Water supply check valve; 4. Permanent magnet synchronous variable frequency pump; 5. Heater; 6. Over-temperature sensor; 7. Expansion tank; 8. Liquid level control group; 9. Pressure sensor; 10. Pressure relief valve; 11. Air vent valve; 12. Safety valve; 13. Pressure relief check valve; 14. Air source pressure sensor; 15. Return water temperature sensor; 16. Air pressure regulating valve; 17. Return water filter; 18. Air blowing valve; 19. Air blowing check valve; 20. Outlet water flow sensor; 21. Outlet water pressure sensor; 22. Cooling water flow sensor; 23. Cooling water filter; 24. Cooling valve; 25. Heat exchanger; 26. Heating valve; 27. Outlet water temperature sensor; 28. Water supply filter; 29. ​​Water pressure sensor. 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] This utility model discloses a water temperature control system for die-casting molds, such as... Figure 1As shown, it includes a temperature regulation loop. This loop, through the ingenious layout of key components, achieves precise control of mold temperature and stable regulation of system pressure, offering significant advantages over traditional technologies.

[0022] Specifically, the return and outlet ends of the temperature regulation circulation loop are connected to the mold, forming a closed circulation path. The loop includes a circulation pump, heater 5, expansion tank 7, and cooling device connected in series. The circulation pump is a permanent magnet synchronous variable frequency pump 4, which serves as the power source for water circulation. Under the precise control of the frequency converter, it can accurately, quickly, and stably adjust the water output flow and pressure according to the real-time temperature changes of the mold and the system pressure requirements. This characteristic effectively offsets the fluctuations in the system water circulation pressure caused by sudden changes in mold temperature, fundamentally ensuring the stability of the system circulation and significantly reducing the damage to system components caused by pressure fluctuations—something traditional circulation pumps cannot achieve.

[0023] The permanent magnet synchronous variable frequency pump 4 is connected to the mold via a pipeline equipped with a heating valve 26. The heating valve 26 is connected to the mold via a water outlet pipe. When the system needs to heat the mold, the heating valve 26 opens, and water flows through the heater 5 to be heated before being injected into the mold through the water outlet pipe to provide heat. The heater 5 is equipped with an over-temperature sensor 6 to monitor the temperature in real time. The heat exchanger 25 of the cooling device is connected in parallel with the heating valve 26. The heat exchanger 25 is equipped with a circulating water inlet, a circulating water outlet, a cooling water inlet, and a cooling water outlet. The circulating water inlet is connected to the permanent magnet synchronous variable frequency pump 4, and the circulating water outlet is connected to the water outlet pipe. A cooling valve 24 is installed on the connecting pipeline between the two. When the mold temperature is too high and cooling is required, the system's intelligent control mechanism is activated. The heating valve 26 closes, blocking the hot water flow, while the cooling valve 24 opens, guiding hot water from the permanent magnet synchronous variable frequency pump 4 into the circulating water inlet of the heat exchanger 25. Inside the heat exchanger 25, hot water fully exchanges heat with the cooling water flowing in from the cooling water inlet. The cooled water flows out from the circulating water outlet and then returns to the mold through the outlet pipe, achieving efficient cooling of the mold. This design, which precisely switches between heating and cooling modes according to the actual temperature requirements of the mold, can quickly and stably adjust the mold temperature, ensuring that the mold is always within the suitable operating temperature range, effectively improving cooling efficiency and solving the problem of unstable cooling effect in traditional water temperature control systems. A cooling water flow sensor 22 and a cooling water filter 23 are also installed on the pipe at the cooling water inlet to ensure the safety of the cooling water flow rate and flow path.

[0024] The expansion tank 7 plays a crucial role in pressure regulation within the entire system. The pressure relief assembly on the tank is the core component for handling abnormal pressure. The expansion tank 7 is equipped with a level control group 8 and a pressure sensor 9. The pressure relief assembly consists of a pressure relief flow path and an exhaust flow path connected in parallel with the expansion tank 7, both connected to the discharge pipe. A pressure relief valve 10 is installed on the pressure relief flow path, and an exhaust valve 11 is installed on the exhaust flow path. A pressure relief check valve 13 is installed on the discharge pipe. When the pressure in the temperature regulation loop is too high, the pressure relief assembly responds immediately. If the excessive pressure is due to excessive liquid pressure, the pressure relief valve 10 automatically opens, and excess liquid is discharged along the pressure relief flow path through the discharge pipe, reducing the system liquid pressure. If the excessive pressure is caused by gas, the exhaust valve 11 immediately opens, and excess gas is discharged through the exhaust flow path through the discharge pipe. The pressure relief check valve 13 effectively prevents the discharged liquid or gas from flowing back into the system, avoiding secondary pressure fluctuations and damage to system components caused by backflow. In contrast, traditional technologies often lack such efficient and precise pressure regulation mechanisms, which makes it impossible to handle abnormal system pressure in a timely and proper manner, thereby affecting the overall performance and service life of the system.

[0025] In addition, the temperature regulation circulation loop is equipped with a supplementary airflow path and a supplementary waterflow path to further enhance the system's pressure regulation capability. The supplementary airflow path is connected to the water outlet. From the compressed air source to the water outlet, the path is sequentially equipped with an air pressure regulating valve 16, an air source pressure sensor 14, an air blowing valve 18, and an air blowing check valve 19. When the system needs to replenish gas pressure, the compressed air first passes through the air pressure regulating valve 16, which precisely adjusts the pressure according to the actual system pressure requirements. Then, the air source pressure sensor 14 monitors the air pressure in real time to ensure that the air pressure entering the system is stable and meets the standards. Under the control of the air blowing valve 18, the compressed air enters the water outlet through the air blowing check valve 19 to replenish the system's gas pressure. The supplementary waterflow path is connected to the water inlet side of the permanent magnet synchronous variable frequency pump 4, and is sequentially equipped with a water pressure sensor 2, a supplementary water filter 28, a booster pump 1, and a supplementary water check valve 3. When the system needs to replenish liquid pressure, the water source, under the real-time monitoring of the water pressure sensor 2, first passes through the supplementary water filter 28 to remove impurities, ensuring the purity of the water entering the system and preventing impurities from damaging system components. Subsequently, the booster pump 1 pressurizes the system and injects the liquid into the inlet side of the permanent magnet synchronous variable frequency pump 4 through the water replenishment check valve 3, thus replenishing the system's liquid pressure. This precise and efficient gas and liquid replenishment mechanism can quickly regulate the system's pressure balance, ensuring that the system always operates stably, which is difficult to achieve with traditional technologies that suffer from frequent system failures due to large pressure fluctuations.

[0026] Of course, the air supply path and water supply path also serve the following functions: After the equipment is started for the first time, the liquid level in the system is low. At this time, the booster pump 1 and the water supply check valve 3 automatically open. The booster pump 1 provides power to pump external water into the system through the water supply check valve 3, gradually filling the temperature regulation circulation loop and preparing for the normal operation of the system. During the operation of the equipment, the liquid level control group 8 on the expansion tank 7 constantly monitors the liquid level in the system. Once a system lack of medium is detected (i.e., the liquid level is lower than the set value), a signal will be triggered to reopen the booster pump 1 and the water supply check valve 3. Through this mechanism, it is ensured that the system always maintains a sufficient amount of water, maintains the stable operation of the system, and avoids equipment failure or performance degradation due to water shortage. Moreover, after the equipment is started for the first time, the venting work is also carried out simultaneously. The expansion tank 7 is connected to the vent valve 11. At the same time as water is supplied, the vent valve 11 opens simultaneously. Since there may be gas inside the pipeline in the initial state, this gas is driven by the water flow and discharged to the outside of the system through the vent valve 11. This process ensures smooth water flow within the system and prevents gas accumulation from adversely affecting system operation, such as unstable flow or pressure fluctuations caused by air resistance.

[0027] During the heating process of the equipment, the pressure inside the water system gradually increases. When the pressure sensor 9 on the expansion tank 7 detects that the pressure exceeds the set value, the expansion tank 77 is connected to the pressure relief valve 10, which opens to release pressure and reduce the system pressure. The pressure relief valve 10 has a built-in pipe diameter control to prevent excessive pressure drop when the pressure relief valve is opened. After the equipment stops, the control system sends an air blowing command. Compressed air is adjusted to the required pressure through the air pressure regulating valve 16, and the air blowing valve 18 opens to blow into the system, purging the water medium inside the pipeline and discharging it from the exhaust valve 11.

[0028] In the entire temperature regulation loop, a return water filter 17, a return water temperature sensor 15, and a safety valve 12 are sequentially installed near the return water end; and an outlet water flow sensor 20, an outlet water pressure sensor 21, and an outlet water temperature sensor 27 are sequentially installed near the outlet water end. These sensors act like the "nerve endings" of the system, monitoring various parameters such as water flow, pressure, and temperature in real time, and quickly transmitting the data to the control module. The control module, like the "brain" of the system, intelligently regulates the valves and pumps based on the received data. For example, when the control module receives a high pressure signal from the outlet water pressure sensor 21, it controls the pressure relief valve 10 or the air vent valve 11 in the pressure relief assembly to open and regulate the pressure; when it receives a high temperature signal from the return water temperature sensor 15, it controls the cooling valve 24 to open and activate the cooling mode. This comprehensive and intelligent real-time monitoring and control system ensures that the die-casting mold water temperature controller system operates stably and efficiently, greatly improving system reliability and service life, while also improving the cooling efficiency of the die-casting mold and product quality, giving the die-casting production process higher stability and reliability, and powerfully promoting the development of the die-casting industry.

[0029] It is worth noting that there is also a bypass passage connecting the return water end and the outlet water end. The bypass passage can help regulate the water flow and balance the pressure during system operation, or form a loop under harsh working conditions to ensure system safety.

[0030] Its working principle is as follows: During normal operation, the control system determines that the outlet water temperature is lower than the target temperature. The water medium is heated in heater 5, which is connected to a permanent magnet synchronous variable frequency pump. The permanent magnet synchronous variable frequency pump 4 is connected to heating valve 26, which opens the heating output to the mold end for heating. When the outlet water temperature is higher than the target temperature, the water medium does not heat up in heater 5. The permanent magnet synchronous variable frequency pump 4 is connected to cooling valve 24, which opens the cooling output to the mold end for cooling. Driven by the permanent magnet variable frequency pump, the water medium passes through heating valve 26 to the mold end. After passing through the mold end, the water medium enters the next cycle through return water filter 17, heating pipes, etc. In this new mold temperature balancing water system, the required temperature water medium is delivered to the mold in a timely, accurate, and stable manner through the circulation module for heat exchange, perfectly solving the problem of quickly achieving temperature balance in large molds in the die-casting industry.

[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 die-casting mold water temperature machine system characterized by, The application relates to a temperature-adjusting circulating loop, which comprises a return water end and a water outlet end connected with a mold, and comprises a circulating pump, a heater, an expansion tank and a cooling device connected in series, wherein a pressure relief assembly is arranged on the expansion tank, the pressure relief assembly comprises a pressure relief flow path and an exhaust flow path connected in parallel with the expansion tank, the pressure relief flow path and the exhaust flow path are jointly connected with a discharge pipe, and a gas supplement flow path and a water supplement flow path are further connected with the temperature-adjusting circulating loop. A pressure relief valve is arranged on the pressure relief flow path, an exhaust valve is arranged on the exhaust flow path, and a pressure relief check valve is arranged on the discharge pipe.

2. The die casting mold water temperature machine system according to claim 1, characterized by, A return water filter, a return water temperature sensor and a safety valve are arranged on the temperature-adjusting circulating loop close to the return water end; a water outlet flow sensor, a water outlet pressure sensor and a water outlet temperature sensor are arranged on the temperature-adjusting circulating loop close to the water outlet end; and the return water filter, the return water temperature sensor, the safety valve, the water outlet flow sensor, the water outlet pressure sensor and the water outlet temperature sensor are signal-connected with a control module.

3. The die casting mold water temperature machine system according to claim 1, characterized by, The circulating pump is connected with the mold, a heating valve is arranged on a pipeline connected with the circulating pump, and the heating valve and the mold are connected through a water outlet pipe; the cooling device comprises a heat exchanger connected in parallel with the heating valve, the heat exchanger comprises a circulating water inlet, a circulating water outlet, a cooling water inlet and a cooling water outlet, the circulating water inlet is connected with the circulating pump, the circulating water outlet is connected with the water outlet pipe, and a cooling valve is further arranged on a pipeline connecting the circulating water outlet end and the water outlet pipe.

4. The die casting mold water temperature machine system according to claim 1, characterized by, The gas supplement flow path is connected with the water outlet end, and an air pressure regulating valve, a gas source pressure sensor, a blowing valve and a blowing check valve are sequentially arranged on a flow path from a compressed air end to the water outlet end of the gas supplement flow path.

5. The die casting mold water temperature machine system according to claim 1, characterized by, The water supplement flow path is connected with a water inlet side of the circulating pump, and a water pressure sensor, a water supplement filter, a booster pump and a water supplement check valve are arranged on the water supplement flow path.

6. The die casting mold water temperature machine system according to claim 1, characterized by, A bypass path is further connected between the return water end and the water outlet end.

7. The die casting mold water temperature machine system according to claim 1, characterized by, The circulating pump is a permanent magnet synchronous variable frequency pump.

8. The die casting mold water temperature machine system according to claim 1, characterized by, ​

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