Hydraulic oil constant temperature control system of injection molding machine

Abstract

The invention discloses a hydraulic oil constant temperature control system for an injection molding machine, which is applied to the constant temperature of hydraulic oil of the injection molding machine, and comprises the injection molding machine, a hydraulic oil pipeline system and a hydraulic oil constant temperature control system, a left module and a right module are arranged in the injection molding machine, the first hydraulic drive is connected with the left module, a left mold cavity is formed in the left module, a second hydraulic drive is arranged on one side of the left mold cavity, and a temperature regulation and control device is arranged on the periphery of the injection molding machine. The conveying assembly comprises a third hydraulic drive, the third hydraulic drive is used for conveying materials on the conveying assembly, a fourth hydraulic drive is arranged on one side of the right module, the temperature of hydraulic oil can be internally adjusted, and the working stability of the injection molding machine is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of hydraulic oil constant temperature technology for injection molding machines, specifically to a hydraulic oil constant temperature control system for injection molding machines. Background Technology

[0002] Injection molding machines are molding devices that shape thermoplastic or thermosetting materials into various shapes, with horizontal injection molding machines being the most common. Horizontal injection molding machines typically require hydraulic cylinders and other equipment. The hydraulic oil in these cylinders usually needs cooling. During operation, the high-temperature oil in the hydraulic system flows through a hydraulic oil cooler, where it undergoes efficient heat exchange with a forced-flowing cooling medium in a heat exchanger. This reduces the oil temperature to the operating temperature, ensuring continuous and normal operation of the machine and enabling smooth workflow.

[0003] Existing technologies typically employ water cooling, where the water is usually cooled using cooling towers commonly found in factory areas. However, this method has significant drawbacks. Cooling towers are greatly affected by ambient temperature, especially in hot weather like summer, where their cooling effect on hot water is very poor. Therefore, the cooling efficiency is greatly reduced in summer, making it impossible to achieve constant temperature control of hydraulic oil.

[0004] Therefore, a hydraulic oil constant temperature control system for injection molding machines is designed to internally regulate the hydraulic oil temperature and ensure the working stability of the injection molding machine. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic oil constant temperature control system for injection molding machines to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hydraulic oil constant temperature control system for an injection molding machine, comprising an injection molding machine, a hydraulic oil pipeline system and a hydraulic oil constant temperature control system, wherein the injection molding machine includes a transmission component and a mold assembly, a hydraulic drive one is provided on one side of the mold assembly, a left mold group and a right mold group are provided inside the injection molding machine, the hydraulic drive one is connected to the left mold group, a left mold cavity is provided inside the left mold group, a hydraulic drive two is provided on one side of the left mold cavity, and a temperature control device is provided around the injection molding machine; The transmission component includes a hydraulic drive three, which is used to transport materials in the transmission component, and a hydraulic drive four is provided on one side of the right module. The hydraulic oil pipeline system includes an oil tank, multiple sets of reversing switch solenoid valves, oil pipe one and oil pipe two. The reversing switch solenoid valves, oil pipe one and oil pipe two correspond to each set of hydraulic drives and are connected to the oil tank through pipelines to form a hydraulic oil injection molding system.

[0007] According to the above technical solution, the oil tank is internally equipped with a first pump body and a second main oil pipe. The first pump body is connected to a first main oil pipe. The first main oil pipe is connected to a first central pipe through a three-way valve. The first central pipe is connected to an oil outlet pipe through a three-way valve. The second main oil pipe is connected to a second central pipe through a three-way valve. The second central pipe is connected to an oil inlet pipe through a three-way valve. Oil pipe one, oil pipe two, as well as the inlet and outlet oil pipes, are all connected to the reversing switch solenoid valve.

[0008] According to the above technical solution, the main oil pipe is connected to a filter device 1 and a filter device 2, and the filter device 1 and the filter device 2 are connected in parallel.

[0009] According to the above technical solution, each set of oil outlet pipes is connected to a radiator and a heating device 1 at both ends to control the temperature of the hydraulic oil entering the hydraulic drive. Each set of oil outlet pipes is connected to a temperature sensor 1, and each set of oil inlet pipes is connected to a temperature sensor 2 to detect the temperature of the hydraulic oil entering and exiting.

[0010] Oil pipe one and oil pipe two are respectively connected to hydraulic sensor one and hydraulic sensor two for detecting hydraulic pressure. According to the above technical solution, a circulation pipe is connected to one side of the oil outlet pipe, and a spare tank is connected to one end of the circulation pipe. The spare tank is filled with hydraulic oil, and a hydraulic pump is connected to the circulation pipe.

[0011] According to the above technical solution, the oil tank is equipped with a heating device 2 and a temperature sensor 3. A heat exchanger is connected to one side of the oil tank via a pipe. A suction pump is connected between the oil tank and the heat exchanger. A cooling source is connected to one end of the heat exchanger via a pipe. A return pipe is connected between the heat exchanger and the oil tank. A valve is connected to the return pipe.

[0012] According to the above technical solution, the hydraulic oil constant temperature control system includes a data acquisition module and a constant temperature control module. The data acquisition module includes a temperature acquisition submodule one, a temperature acquisition submodule two, a hydraulic detection submodule, and a time recording submodule. The time recording submodule includes a calculation unit. The constant temperature control module includes a heating submodule, a cooling submodule, a switching submodule, and an early warning submodule.

[0013] According to the above technical solution, the hydraulic oil constant temperature control system includes the following operating methods: Method 1: When the injection molding machine is working, the hydraulic oil pipeline system is activated, and the injection molding machine starts the injection process; Method 2: Monitor the temperature of the hydraulic oil pipeline system in real time while it is working to ensure the stability of the injection molding machine.

[0014] According to the above technical solution, the second method includes the following specific usage methods: Method 2-a: Always keep the temperature inside the oil tank at the set temperature to ensure the stability of the hydraulic oil output temperature; Method 2-b: When the hydraulic oil passes through the main oil pipe, it will pass through the filter device to filter out impurities in the hydraulic oil, ensuring that there are no impurities in the hydraulic oil. Method 2-c: Determine whether the hydraulic oil is affected by the external temperature and whether the temperature changes during the hydraulic oil transmission process; Method 2-d: Determine the quality of hydraulic oil based on its hydraulic state and temperature.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, by setting up a hydraulic oil pipeline system, when the temperature of the hydraulic oil in the oil tank is not within the set temperature range, and the temperature change rate of the hydraulic oil in the oil outlet pipe is slow, transmits a signal to the alarm submodule to inform the operator that there is a problem with the hydraulic oil in the oil tank, and starts the hydraulic pump to pump the hydraulic oil in the spare tank into the circulation pipe, and then into the hydraulic oil pipeline system of the injection molding machine, ensuring that the injection molding machine is always in a stable working state. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a schematic diagram of the hydraulic oil pipeline system of the present invention; Figure 3 This is the present invention. Figure 2 Enlarged schematic diagram of region A; Figure 4 This is the present invention. Figure 2 Enlarged schematic diagram of region B; Figure 5 This is a schematic diagram of the hydraulic oil constant temperature control system of the present invention; Figure 6 This is a schematic diagram of the hydraulic oil flow direction of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the hydraulic oil flow direction of the present invention. Figure 2 ; In the diagram: 1. Compression molding assembly; 2. Hydraulic drive three; 3. Hydraulic drive one; 4. Hydraulic drive four; 5. Hydraulic drive two; 6. Oil pipe one; 7. Oil pipe two; 8. Oil inlet pipe; 9. Oil outlet pipe; 10. Filter device one; 11. Central pipe two; 12. Central pipe one; 13. Main oil pipe two; 14. Main oil pipe one; 15. Reversing switch solenoid valve; 16. Return pipe; 17. First pump body; 18. Temperature sensor two; 19. Oil tank; 20. Temperature sensor three; 21. Heating device two; 22. Temperature sensor one; 23. Suction pump; 24. Heat exchanger; 25. Cooling source; 26. Valve; 27. Circulation pipe; 28. Filter device two; 29. ​​Radiator; 30. Heating device one; 31. Hydraulic sensor one; 32. Hydraulic sensor two. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-7 The present invention provides a technical solution: a hydraulic oil constant temperature control system for an injection molding machine, comprising an injection molding machine, a hydraulic oil pipeline system and a hydraulic oil constant temperature control system. The injection molding machine includes a transmission component and a mold assembly 1. A hydraulic drive 3 is provided on one side of the mold assembly 1. A left mold group and a right mold group are provided inside the injection molding machine. The hydraulic drive 3 is connected to the left mold group. A left mold cavity is provided inside the left mold group. A hydraulic drive 5 is provided on one side of the left mold cavity. A temperature control device (not shown in the figure) is provided around the injection molding machine.

[0019] The transmission assembly includes a hydraulic drive 2, which is used to transport materials in the transmission assembly, and a hydraulic drive 4 is provided on one side of the right module.

[0020] The hydraulic oil pipeline system is connected to hydraulic drive 1 (3), hydraulic drive 2 (5), hydraulic drive 3 (2), and hydraulic drive 4 (4). Hydraulic drive 1 (3), hydraulic drive 2 (5), hydraulic drive 3 (2), and hydraulic drive 4 (4) are all hydraulic cylinders with built-in pistons and other components. This is existing technology and will not be described in detail. Through the cooperation of the hydraulic oil pipeline system with hydraulic drive 1 (3), hydraulic drive 2 (5), hydraulic drive 3 (2), and hydraulic drive 4 (4), the operation of the injection molding machine is controlled to complete the injection molding process.

[0021] The hydraulic oil pipeline system includes an oil tank 19, multiple sets of reversing switch solenoid valves 15, oil pipe 1 6 and oil pipe 2 7. The reversing switch solenoid valves 15, oil pipe 1 6 and oil pipe 2 7 correspond to each set of hydraulic drives and are connected to the oil tank 19 through pipelines to form a hydraulic oil injection molding system.

[0022] Specifically, the oil tank 19 is equipped with a first pump body 17 and a second main oil pipe 13. The first pump body 17 is connected to a first main oil pipe 14. The first main oil pipe 14 is connected to a first central pipe 12 through a three-way valve. The first central pipe 12 is connected to an oil outlet pipe 9 through a three-way valve. The second main oil pipe 13 is connected to a second central pipe 11 through a three-way valve. The second central pipe 11 is connected to an oil inlet pipe 8 through a three-way valve.

[0023] Oil pipe 6, oil pipe 7, oil inlet pipe 8, and oil outlet pipe 9 are all connected to the reversing switch solenoid valve 15.

[0024] When the injection molding machine is working, the first pump body 17 is started to draw hydraulic oil from the oil tank 19 into the main oil pipe 14, and then distributes it to each hydraulic drive through the central pipe 12 and the oil pipe 7 on the reversing switch solenoid valve 15, driving each hydraulic drive to work. The hydraulic oil at the other end of the hydraulic drive is squeezed by the piston in the hydraulic drive and flows from the oil pipe 6 through the reversing switch solenoid valve 15 to the oil inlet pipe 8, and then flows back to the oil tank 19 through the central pipe 11, completing the hydraulic oil circuit when the injection molding machine is working.

[0025] It should be noted that the reversing switch solenoid valve 15 opens according to actual conditions, which can switch the flow direction of hydraulic oil into each hydraulic drive to achieve better injection molding, such as... Figure 6 and Figure 7 As shown, the direction of hydraulic drive is changed.

[0026] The main oil pipe 14 is connected to filter device 10 and filter device 28, which are connected in parallel.

[0027] Each set of oil outlet pipes 9 is connected to a radiator 29 and a heating device 30 at both ends to control the temperature of the hydraulic oil entering the hydraulic drive. Each set of oil outlet pipes 9 is connected to a temperature sensor 22, and each set of oil inlet pipes 8 is connected to a temperature sensor 18 to detect the temperature of the hydraulic oil entering and exiting.

[0028] Oil pipe 6 and oil pipe 7 are respectively connected to hydraulic sensor 31 and hydraulic sensor 32 for detecting hydraulic pressure.

[0029] One side of the oil outlet pipe 9 is connected to a circulation pipe 27, and one end of the circulation pipe 27 is connected to a spare tank. The spare tank contains hydraulic oil, and a hydraulic pump (not shown in the figure) is connected to the circulation pipe 27.

[0030] The oil tank 19 is equipped with a heating device 21 and a temperature sensor 20. A heat exchanger 24 is connected to one side of the oil tank 19. A suction pump 23 is connected between the oil tank 19 and the heat exchanger 24. A cooling source 25 is connected to one end of the heat exchanger 24. The cooling source 25 can be a cooling tower. A return pipe 16 is connected between the heat exchanger 24 and the oil tank 19. A valve 26 is connected to the return pipe 16.

[0031] When the temperature of the hydraulic oil in the oil tank 19 is too high, the suction pump 23 and valve 26 are turned on to draw the hydraulic oil through the heat exchanger 24 for heat exchange, and then the heat-exchanged hydraulic oil is returned to the oil tank 19 through the return pipe 16 to ensure the temperature of the hydraulic oil in the oil tank 19.

[0032] The hydraulic oil constant temperature control system includes a data acquisition module and a constant temperature control module. The data acquisition module includes a temperature acquisition submodule 1, a temperature acquisition submodule 2, a hydraulic detection submodule, and a time recording submodule. The time recording submodule includes a calculation unit.

[0033] Temperature acquisition submodule one is electrically connected to temperature sensor three 20, temperature acquisition submodule two is electrically connected to temperature sensor one 22 and temperature sensor two 18, and hydraulic detection submodule is electrically connected to hydraulic sensor one 31 and hydraulic sensor two 32.

[0034] The constant temperature control module includes a heating submodule, a cooling submodule, a switching submodule, and an early warning submodule.

[0035] The heating submodule is electrically connected to the heating device 30, the cooling submodule is electrically connected to the radiator 29, and the switching submodule is electrically connected to the filter device 10 and the filter device 28.

[0036] The hydraulic oil constant temperature control system includes the following operating methods: Method 1: When the injection molding machine is working, the hydraulic oil pipeline system is activated, and the injection molding machine starts the injection process; Method 2: Monitor the temperature of the hydraulic oil pipeline system in real time while it is working to ensure the stability of the injection molding machine. Method 2 includes the following specific usage methods: Method 2-a: Always ensure that the temperature inside the oil tank 19 is at the set temperature to ensure the stability of the hydraulic oil output temperature.

[0037] Specifically, temperature sensor 20 detects the temperature of oil tank 19 and transmits it to temperature acquisition submodule 1. A constant temperature is set in temperature acquisition submodule 1. When the temperature of the hydraulic oil inside oil tank 19 is higher than the set temperature, suction pump 23 is turned on to cool the hydraulic oil inside oil tank 19 to the set temperature. When the temperature of the hydraulic oil inside oil tank 19 is lower than the set temperature, heating device 21 is turned on to heat the hydraulic oil. Through this step, the hydraulic oil inside oil tank 19 is kept at a constant temperature at all times.

[0038] Method 2-b: When the hydraulic oil passes through the main oil pipe 14, it will pass through the filter device 10 to filter out impurities in the hydraulic oil, ensuring that there are no impurities in the hydraulic oil.

[0039] Specifically, when the filter element inside filter device 10 needs to be replaced, filter device 10 is turned off and filter device 28 is turned on as a backup to ensure working efficiency.

[0040] Method 2-c: Determine whether the hydraulic oil is affected by the external temperature during the hydraulic oil transmission process, and whether the temperature changes.

[0041] Specifically, when hydraulic oil passes through the outlet pipe 9, temperature sensor 22 detects the temperature of the hydraulic oil passing through the outlet pipe 9 in real time and transmits it to temperature acquisition submodule 2. A constant temperature is set in temperature acquisition submodule 2. When the temperature is higher than the set temperature, a signal is transmitted to the heating submodule to control the heating device 30 to start heating the surface of the outlet pipe 9, thereby increasing the temperature of the hydraulic oil. When the temperature is lower than the set temperature, a signal is transmitted to the cooling submodule to control the radiator 29 to turn on and dissipate heat from the surface of the outlet pipe 9, thereby reducing the temperature of the hydraulic oil.

[0042] Furthermore, the time recording submodule records the time from the initial change in hydraulic oil temperature within the outlet pipe 9 to the hydraulic oil temperature returning to a constant temperature, denoted as t1 and t0. Here, t1 is the initial time of the hydraulic oil temperature change, and t0 is the time for the hydraulic oil temperature to return to a constant temperature. The calculation unit analyzes the time for the hydraulic oil temperature within the outlet pipe 9 to return to normal: t = t0 - t1, where t is the time from the initial change in hydraulic oil temperature to the return to a constant temperature. The normal cooling duration is set to t2 in the time recording submodule. When t is less than or equal to t2, it indicates a rapid change in the hydraulic oil temperature within the outlet pipe 9; when t is greater than t2, it indicates a slow change in the hydraulic oil temperature within the outlet pipe 9.

[0043] When the temperature of the hydraulic oil in tank 19 is within the set temperature range, but the temperature of the hydraulic oil in outlet pipe 9 changes slowly, it indicates that outlet pipe 9 is greatly affected by the external temperature. In this case, a signal is transmitted to the temperature control device in the injection molding machine workshop to control the temperature difference between the surrounding temperature of the injection molding machine and the temperature of the hydraulic oil in outlet pipe 9 to minimize the influence of the external temperature on outlet pipe 9. When the temperature of the hydraulic oil in tank 19 is within the set temperature range, but the temperature of the hydraulic oil in outlet pipe 9 changes quickly, it indicates that the hydraulic oil temperature is changing normally.

[0044] When the temperature of the hydraulic oil in the oil tank 19 is not within the set temperature range, and the temperature of the hydraulic oil in the oil outlet pipe 9 changes slowly, a signal is transmitted to the alarm submodule to inform the staff that there is a problem with the hydraulic oil in the oil tank 19. The hydraulic pump is then turned on to pump the hydraulic oil from the spare tank into the circulation pipe 27, and then into the hydraulic oil pipeline system of the injection molding machine, ensuring that the injection molding machine is always in a stable working state.

[0045] Method 2-d: Determine the quality of hydraulic oil based on its hydraulic state and temperature.

[0046] Specifically, the hydraulic sensor array monitors the hydraulic oil pressure in real time and transmits the signal to the hydraulic detection submodule. The submodule analyzes the changes in hydraulic pressure during transmission. When the hydraulic pressure is constant, it indicates stable hydraulic oil delivery. When the hydraulic pressure fluctuates, it indicates unstable hydraulic oil delivery. The hydraulic oil quality is further assessed based on the pressure status.

[0047] For example, when the hydraulic oil delivery is unstable and the temperature of the hydraulic oil in the outlet pipe 9 changes slowly, it indicates that there are many impurities in the hydraulic oil, which means that the quality of the hydraulic oil has deteriorated and needs to be replaced with new hydraulic oil. When the hydraulic oil delivery is unstable and the temperature of the hydraulic oil in the outlet pipe 9 changes quickly, but the hydraulic pressure tends to stabilize after adjusting the temperature, it means that although the hydraulic oil contains impurities, it is within the allowable range. At this time, the signal is transmitted to the switching submodule to control another set of incoming filtering devices to work and ensure the quality of the hydraulic oil.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic oil constant temperature control system for an injection molding machine, comprising an injection molding machine, a hydraulic oil pipeline system, and a hydraulic oil constant temperature control system, characterized in that: The injection molding machine includes a transmission assembly and a mold assembly (1). A hydraulic drive (3) is provided on one side of the mold assembly (1). A left mold group and a right mold group are provided inside the injection molding machine. The hydraulic drive (3) is connected to the left mold group. A left mold cavity is provided inside the left mold group. A hydraulic drive (5) is provided on one side of the left mold cavity. A temperature control device is provided around the injection molding machine. The transmission assembly includes a hydraulic drive three (2) for conveying materials in the transmission assembly, and a hydraulic drive four (4) is provided on one side of the right module. The hydraulic oil pipeline system includes an oil tank (19), multiple sets of reversing switch solenoid valves (15), oil pipe one (6) and oil pipe two (7). The reversing switch solenoid valves (15), oil pipe one (6) and oil pipe two (7) correspond to each set of hydraulic drives and are connected to the oil tank (19) through pipelines to form a hydraulic oil injection molding system.

2. The hydraulic oil constant temperature control system for an injection molding machine according to claim 1, characterized in that: The oil tank (19) is equipped with a first pump body (17) and a second main oil pipe (13). The first pump body (17) is connected to a first main oil pipe (14). The first main oil pipe (14) is connected to a first central pipe (12) through a three-way valve. The first central pipe (12) is connected to an oil outlet pipe (9) through a three-way valve. The second main oil pipe (13) is connected to a second central pipe (11) through a three-way valve. The second central pipe (11) is connected to an oil inlet pipe (8) through a three-way valve. The first oil pipe (6), the second oil pipe (7), the inlet oil pipe (8), and the outlet oil pipe (9) are all connected to the reversing switch solenoid valve (15).

3. The hydraulic oil constant temperature control system for injection molding machines according to claim 2, characterized in that: The main oil pipe (14) is connected to a filter device (10) and a filter device (28), which are connected in parallel.

4. The hydraulic oil constant temperature control system for an injection molding machine according to claim 3, characterized in that: Each set of oil outlet pipes (9) is connected to a radiator (29) and a heating device (30) at both ends to control the temperature of the hydraulic oil entering the hydraulic drive. Each set of oil outlet pipes (9) is connected to a temperature sensor (22), and each set of oil inlet pipes (8) is connected to a temperature sensor (18) to detect the temperature of the hydraulic oil entering and exiting. The first oil pipe (6) and the second oil pipe (7) are respectively connected to the first hydraulic sensor (31) and the second hydraulic sensor (32) for detecting hydraulic pressure.

5. The hydraulic oil constant temperature control system for an injection molding machine according to claim 4, characterized in that: One side of the oil outlet pipe (9) is connected to a circulation pipe (27), one end of the circulation pipe (27) is connected to a spare tank, the spare tank is filled with hydraulic oil, and a hydraulic pump is connected to the circulation pipe (27).

6. The hydraulic oil constant temperature control system for an injection molding machine according to claim 5, characterized in that: The oil tank (19) is equipped with a second heating device (21) and a third temperature sensor (20). A heat exchanger (24) is connected to one side of the oil tank (19). A suction pump (23) is connected between the oil tank (19) and the heat exchanger (24). A cooling source (25) is connected to one end of the heat exchanger (24). A return pipe (16) is connected between the heat exchanger (24) and the oil tank (19). A valve (26) is connected to the return pipe (16).

7. The hydraulic oil constant temperature control system for an injection molding machine according to claim 6, characterized in that: The hydraulic oil constant temperature control system includes a data acquisition module and a constant temperature control module. The data acquisition module includes a temperature acquisition submodule one, a temperature acquisition submodule two, a hydraulic detection submodule, and a time recording submodule. The time recording submodule includes a calculation unit. The constant temperature control module includes a heating submodule, a cooling submodule, a switching submodule, and an early warning submodule.

8. The hydraulic oil constant temperature control system for an injection molding machine according to claim 7, characterized in that: The hydraulic oil constant temperature control system includes the following operating methods: Method 1: When the injection molding machine is working, the hydraulic oil pipeline system is activated, and the injection molding machine starts the injection process; Method 2: Monitor the temperature of the hydraulic oil pipeline system in real time while it is working to ensure the stability of the injection molding machine.

9. The hydraulic oil constant temperature control system for an injection molding machine according to claim 8, characterized in that: The second method includes the following specific usage methods: Method 2-a: Always ensure that the temperature inside the oil tank (19) is at the set temperature to ensure the stability of the hydraulic oil output temperature; Method 2-b: When the hydraulic oil passes through the main oil pipe 1 (14), the hydraulic oil will pass through the filter device 1 (10) to filter out impurities in the hydraulic oil and ensure that there are no impurities in the hydraulic oil. Method 2-c: Determine whether the hydraulic oil is affected by the external temperature and whether the temperature changes during the hydraulic oil transmission process; Method 2-d: Determine the quality of hydraulic oil based on its hydraulic state and temperature.

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