Release agent supply system with wide pressure range

Abstract

The invention relates to a wide-pressure-range release agent supply system in the technical field of die-casting demolding, which comprises an air source for supplying compressed air; the raw material tank is used for storing and supplying a release agent stock solution; release agent stock solution in the raw material tank is input into the mixing tank through a stock solution conveying pipeline, dilution water is input into the mixing tank through a dilution water conveying pipeline, and a stirrer is installed on the mixing tank; a release agent solution which is uniformly mixed in the pressure feeding tank and the mixing tank is input into the pressure feeding tank through a mixed solution input pipeline, the volume of the pressure feeding tank is smaller than that of the mixing tank, the gas source is input into the pressure feeding tank through a pressure gas pipeline, and after the pressure feeding tank receives pre-gas and reaches preset pressure, the mixed solution is conveyed to the spray head through a mixed solution output pipeline. The pressure feed tank with the driving pressure supplied by the air source directly outputs the mixed liquid to the outside, so that the pressure is stable, the minimum value of the pressure can be reduced to 0.05 MPa, and the application scene of the system is expanded.

Description

Technical Field

[0001] This invention relates to the field of die casting release technology, and more specifically, to a release agent supply system with a wide pressure range. Background Technology

[0002] Release agent is a functional substance that lies between the mold and the finished product. In a die-casting machine, molten metal is hydraulically injected onto the mold. Before casting, the release agent needs to be evenly distributed on the surface of the cavity to form a separating film between the mold and the molten metal, so that the cavity is not directly washed by the molten metal; during the die casting process, it helps the molten metal to enter the cavity and makes the filling complete; after the casting is formed, it makes it easy to demold.

[0003] Currently, the common method for spraying release agents involves diluting the release agent and water in a certain ratio, placing the mixture in a container, and then using a device such as a diaphragm pump to deliver the mixture to the nozzle for atomization and spraying. However, this method suffers from problems such as unstable pressure within the system and the limitation of the minimum pumping pressure of diaphragm pumps, making it difficult to adapt to applications requiring lower pressures. For example, CN103212658A discloses an automatic mold release agent spraying system, including a mixing tank, a compressed air source, and a spray gun. The mixing tank is connected to the spray gun via a mold release agent delivery pipeline, and the compressed air source is connected to the spray gun via a compressed air delivery pipeline. A tank valve, a high-pressure pneumatic plunger pump, and an oil flow regulating valve are sequentially installed on the mold release agent delivery pipeline between the mixing tank and the spray gun. A pressure reducing valve and an air flow regulating valve are sequentially installed on the compressed air delivery pipeline between the high-pressure pneumatic plunger pump and the mold release agent flow regulating valve. An accumulator is installed on the mold release agent delivery pipeline between the accumulator and the mold release agent flow regulating valve. A pressure sensor is installed on the mold release agent delivery pipeline between the accumulator and the mold release agent flow regulating valve. This device ensures stable spray pressure of the mixture by using an accumulator, but the addition of auxiliary settings increases the system cost. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a release agent supply system with a wide pressure range.

[0005] A wide pressure range mold release agent supply system according to the present invention includes: Air source, used to supply compressed air; Raw material tank, used to store and supply mold release agent concentrate; The raw material tank contains a release agent concentrate, which is introduced into the mixing tank through a concentrate delivery pipeline. Diluent water is introduced into the mixing tank through a diluent delivery pipeline. The mixing tank is equipped with a stirrer for stirring and mixing the release agent concentrate and diluent water. The pressure delivery tank is a mixture of a uniformly mixed release agent solution in the mixing tank, which is fed into the pressure delivery tank through a mixture input pipeline. The volume of the pressure delivery tank is smaller than that of the mixing tank. The gas source is fed into the pressure delivery tank through a compressed air pipeline. After the pressure delivery tank receives the pre-gas and reaches a predetermined pressure, it delivers the mixture to the nozzle through a mixture output pipeline.

[0006] In some embodiments, the pressure inside the pressure tank ranges from 0.05 to 5 MPa.

[0007] In some embodiments, the compressed air pipeline is equipped with a pressure regulating valve and a pressure gauge. The pressure gauge acquires the pressure in the compressed air pipeline, and the pressure regulating valve determines the on / off state of the compressed air pipeline based on the pressure in the pipeline fed back by the pressure gauge.

[0008] In some embodiments, an air filter is provided on the compressed air line, and the air filter is installed at the air inlet of the compressed air line.

[0009] In some embodiments, a gas recovery pipeline is provided between the gas source and the pressure tank, and an exhaust solenoid valve is installed on the gas recovery pipeline. The exhaust solenoid valve is located at the exhaust port of the pressure tank.

[0010] In some embodiments, the raw liquid delivery pipeline is equipped with a metering component, which includes a first three-way valve, a mold release agent metering device, and a metering switching solenoid valve. The raw liquid tank, the mold release agent metering device, and the mixing tank are connected through the first three-way valve. The metering switching solenoid valve is connected to the gas recovery pipeline. The metering switching solenoid valve has a first gas path and a second gas path. The first three-way valve is connected to the first gas path and the second gas path respectively. The mold release agent metering device is connected to the first gas path and the second gas path respectively. The metering switching solenoid valve switches the on / off state of the first gas path and the second gas path, thereby causing the first three-way valve to reverse and the mold release agent metering device to draw in and discharge liquid.

[0011] In some embodiments, the mixed liquid input pipeline, the pressure delivery tank, and the mixed liquid output pipeline are connected by a second three-way valve, and the second three-way valve is connected to the gas recovery pipeline through a three-way solenoid valve. The three-way solenoid valve switches the second three-way valve by switching the gas path.

[0012] In some embodiments, a one-way valve and a mixed liquid flow meter are sequentially provided between the second three-way valve and the nozzle.

[0013] In some embodiments, the dilution water delivery pipeline is provided with a Y-type filter, a dilution water solenoid valve, and a dilution water flow meter in sequence from upstream to downstream.

[0014] In some embodiments, both the raw material tank and the mixing tank are equipped with level gauges.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The mold release agent supply system of the present invention has a wide pressure range. The mixed liquid is directly output to the outside through the pressure delivery tank driven by the air source. The pressurized liquid output by the pressure delivery tank not only stabilizes the pressure, but also reduces the minimum pressure value to 0.05MPa. Compared with the minimum pressure value of 0.2MPa when using devices such as diaphragm pumps to output the mixed liquid, it can significantly expand the pressure value range required for the nozzle to atomize and spray the mixed liquid, greatly expand the application scenarios of the system, and improve the practicality of the mold release agent supply system.

[0016] 2. The mold release agent supply system of the present invention with a wide pressure range saves energy and reduces consumption and costs by setting up a gas recovery pipeline.

[0017] 3. The release agent supply system of the present invention with a wide pressure range is provided with a control valve group driven by a gas source between the gas recovery pipeline and the raw liquid delivery pipeline and / or between the gas recovery pipeline and the mixed liquid input and output pipeline. On the one hand, it reduces the additional driving device and lowers the system cost. On the other hand, it simplifies the pipeline design of the system and improves efficiency. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the mold release agent supply system with a wide pressure range according to the present invention. Figure 2 This is a schematic diagram of the operation of the metering component in the wide pressure range release agent supply system of the present invention. Detailed Implementation

[0019] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0020] Example 1 This embodiment provides a release agent supply system with a wide pressure range, such as... Figure 1-2 As shown, it mainly includes a raw material tank 2, a mixing tank 3, a pressure conveying tank 4, and an air source 1 for conveying compressed air into the pressure conveying tank 4.

[0021] A compressed air pipeline 5 is provided between the air source 1 and the pressure delivery tank 4. The air source 1 can pump or compress air into the pressure delivery tank 4 through an air compressor or a high-pressure air tank, so that the pressure delivery tank 4 reaches a predetermined pressure. In this embodiment, the compressed air pipeline 5 is provided with an air filter 51, a pressure regulating valve 52, and a pressure gauge 53 from upstream to downstream. The air source 1 is filtered by the air filter 15 to form clean air, which is then input into the pressure delivery tank 4. The pressure gauge 53 is used to obtain the real-time pressure in the pipeline 5 during the process of inputting clean air into the pressure delivery tank 4, that is, the real-time pressure inside the pressure delivery tank 4. The pressure regulating valve 52 determines the opening and closing of the compressed air pipeline 5 based on the real-time pressure value obtained by the pressure gauge 53. When the predetermined pressure value is reached, the pressure regulating valve 52 closes, the compressed air pipeline 5 is disconnected, and the input of clean air into the pressure delivery tank 4 is suspended.

[0022] Raw material tank 2 is used to hold the release agent concentrate. A fixed amount of release agent concentrate is introduced into mixing tank 3 through concentrate delivery pipeline 6. The tank body of raw material tank 2 is equipped with a first level gauge 7, which is used to detect the level of release agent concentrate in raw material tank 2, so as to replenish the concentrate in raw material tank 2 in a timely manner.

[0023] The mixing tank 3 receives the release agent concentrate from the raw material tank 2 and simultaneously receives external dilution water via the dilution water delivery pipeline 8. The dilution water delivery pipeline 8 is equipped with a Y-type filter 81, a dilution water solenoid valve 82, and a dilution water flow meter 83, arranged sequentially from upstream to downstream. The Y-type filter 81 filters the dilution water to ensure cleanliness. The dilution water flow meter 83 measures the amount of water entering the mixing tank 3 to ensure the dilution concentration. The dilution water solenoid valve 82 controls the opening and closing of the dilution water delivery pipeline 8 based on the flow rate feedback from the dilution water flow meter 83. The mixing tank 3 is equipped with a stirrer 9, which mixes the release agent concentrate and dilution water entering the mixing tank 3 to achieve a uniform mixture. A measured amount of the mixed solution is fed into the pressure tank 4 from the mixing tank 3 via the mixed solution input pipeline 31. The volume of mixing tank 3 is larger than that of pressure tank 4. For example, the volume of mixing tank 3 is 30-40L, while the volume of pressure tank 4 is 3-5L. This ensures a continuous supply of the mixed liquid while also ensuring that the pressure tank 4 can reach the predetermined pressure. A second level gauge is installed on mixing tank 3 to obtain the liquid level inside mixing tank 3.

[0024] The pressure tank 4 receives a predetermined amount of uniformly mixed liquid from the mixing tank 3 via the mixed liquid input pipeline 31, and simultaneously receives clean compressed air from the air source 1 via the compressed air pipeline 5, ensuring that the pressure inside the pressure tank 4 reaches a predetermined value, which is 0.5-5 MPa. The pressure tank 4 is connected to the nozzle 10 via the mixed liquid output pipeline 41, through which the mixed liquid at the predetermined pressure is atomized and sprayed into the mold, facilitating demolding. To improve the accuracy of the mixed liquid atomization, a one-way valve 11 and a mixed liquid flow meter 12 are installed on the mixed liquid output pipeline 41, arranged sequentially from upstream to downstream. The one-way valve 11 prevents backflow of the mixed liquid, ensuring the pressure of the mixed liquid entering the nozzle 10. The mixed liquid flow meter 12 accurately measures the amount of mixed liquid sprayed.

[0025] The release agent supply system with a wide pressure range provided in this embodiment directly outputs the mixture to the outside through a pressure delivery tank driven by an air source. Outputting pressurized liquid through the pressure delivery tank not only stabilizes the pressure but also reduces the minimum pressure to 0.05 MPa. Compared to the minimum pressure of 0.2 MPa when using devices such as diaphragm pumps to output the mixture, this significantly expands the pressure range required for the nozzle to atomize and spray the mixture, greatly broadens the application scenarios of the system, and improves the practicality of the release agent supply system.

[0026] Example 2 This embodiment 2 is based on embodiment 1, and by setting up a gas recovery pipeline, energy conservation and cost reduction are achieved. Specifically: A gas recovery pipeline 42 is installed between the gas source 1 and the compression tank 4. This pipeline, independent of the compressed gas pipeline 5, is primarily used to recover the gas discharged from the compression tank 4. When a mixture is introduced into the compression tank 4, the gas recovery pipeline needs to be opened, allowing the gas in the compression tank 4 to enter the gas recovery pipeline 42 along with the mixture. Additionally, when the pressure in the compression tank 4 exceeds a predetermined value, a predetermined amount of gas also needs to be discharged into the gas recovery pipeline 42. Through the gas recovery pipeline 42, the gas can be recovered and used for feeding into the compressed gas pipeline 5 or for other purposes, thus improving gas utilization.

[0027] Furthermore, an exhaust solenoid valve 18 is provided on the gas recovery pipeline 42, which can effectively improve the precise control of the exhaust volume.

[0028] Example 3 This embodiment 3 is based on embodiment 2. A control valve assembly driven by a gas source is installed between the gas recovery pipeline and the raw liquid delivery pipeline, and / or between the gas recovery pipeline and the mixed liquid input / output pipeline. This reduces the need for additional driving devices, lowering system costs, and simplifies the system's piping design, thus improving efficiency. Specifically: The raw material delivery pipeline is equipped with a metering component, which mainly includes a first three-way valve 13, a mold release agent metering device 14, and a metering switching solenoid valve 15. The first three-way valve 13 connects to the raw material tank 2, the mixing tank 3, and the mold release agent metering device 14. The metering switching solenoid valve 15 has an inlet connected to the gas recovery pipeline 42 and two switchable outlets, forming two driving gas paths, denoted as the first gas path 151 and the second gas path 152. The first gas path 151 opens the valve connecting the first three-way valve 13 and the mold release agent metering device 14, driving the mold release agent metering device 14 to draw in liquid. The second gas path 152 closes the valve connecting the first three-way valve 13 and the mold release agent metering device 14, driving the mold release agent metering device 14 to discharge liquid. The raw material discharged from the mold release agent metering device 14 is input into the mixing tank 3 through the normally open pipeline connecting the first three-way valve 13 and the mixing tank 3. (See attached diagram) Figure 2 The specific work procedures are briefly described below: When the release agent metering device 14 needs to draw in the raw material tank 2, the metering switching solenoid valve 15 is energized, and compressed air is discharged from the outlet of the first air passage 151 on the left side of the metering switching solenoid valve 15. Compressed air enters from the left arrow of the release agent metering device 14, and the same air opens the first three-way valve 13. When the piston of the release agent metering device 14 moves to the right, the release agent is drawn into the release agent metering device 14 through the opened first three-way valve 13.

[0029] When the release agent metering device 14 needs to inject the original liquid into the mixing tank 3, the metering switching solenoid valve 15 is energized, and compressed air is discharged from the outlet of the second air passage 152 on the right side of the metering switching solenoid valve 15. The compressed air reverses the first three-way valve 13, and at the same time, the compressed air enters from the arrow on the right side of the release agent metering device 14. When the piston of the release agent metering device 14 moves to the left, the release agent is discharged into the mixing tank 3 through the first three-way valve 13, which reverses the valve.

[0030] By utilizing the gas source as the driving force for the mold release agent metering device and the first three-way valve, the problems of bulky structure and complex operation caused by setting up a separate driving device can be avoided. The efficient use of the gas source, especially the effective use of recovered gas, can significantly reduce the system cost and improve the system's operating efficiency.

[0031] Furthermore, the mixed liquid inlet pipeline 31, the pressure tank 4, and the mixed liquid outlet pipeline 41 are connected by a second three-way valve 16, which is connected to the gas recovery pipeline 42 via a three-way switching solenoid valve 17. The working principle of the three-way switching solenoid valve 17 is the same as that of the quantitative switching solenoid valve 15, with one gas inlet and two gas outlets forming two gas paths. These two gas paths cause the valve of the second three-way valve 16 to switch, thereby controlling the mixed liquid to enter the pressure tank 4 from the mixed liquid inlet pipeline 31 and to discharge the mixed liquid from the pressure tank 4 to the mixed liquid outlet pipeline 41.

[0032] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A wide pressure range mold release agent supply system, characterized in that, include: Air source, used to supply compressed air; Raw material tank, used to store and supply mold release agent concentrate; The raw material tank contains a release agent concentrate, which is introduced into the mixing tank through a concentrate delivery pipeline. Diluent water is introduced into the mixing tank through a diluent delivery pipeline. The mixing tank is equipped with a stirrer for stirring and mixing the release agent concentrate and diluent water. The pressure delivery tank is a mixture of a uniformly mixed release agent solution in the mixing tank, which is fed into the pressure delivery tank through a mixture input pipeline. The volume of the pressure delivery tank is smaller than that of the mixing tank. The gas source is fed into the pressure delivery tank through a compressed air pipeline. After the pressure delivery tank receives the pre-gas and reaches a predetermined pressure, it delivers the mixture to the nozzle through a mixture output pipeline.

2. The wide pressure range release agent supply system according to claim 1, characterized in that, The pressure range inside the pressure tank is 0.05-5 MPa.

3. The wide pressure range release agent supply system according to claim 2, characterized in that, The compressed air pipeline is equipped with a pressure regulating valve and a pressure gauge. The pressure gauge obtains the pressure in the compressed air pipeline, and the pressure regulating valve determines the opening and closing of the compressed air pipeline based on the pressure in the pipeline fed back by the pressure gauge.

4. The wide pressure range release agent supply system according to claim 3, characterized in that, An air filter is provided on the compressed air pipeline, and the air filter is installed at the air inlet of the compressed air pipeline.

5. The wide pressure range release agent supply system according to claim 1, characterized in that, A gas recovery pipeline is also provided between the gas source and the pressure conveying tank. An exhaust solenoid valve is installed on the gas recovery pipeline and is located at the exhaust port of the pressure conveying tank.

6. The wide pressure range release agent supply system according to claim 5, characterized in that, The raw liquid delivery pipeline is equipped with a metering component, which includes a first three-way valve, a mold release agent metering device, and a metering switching solenoid valve. The raw liquid tank, the mold release agent metering device, and the mixing tank are connected through the first three-way valve. The metering switching solenoid valve is connected to the gas recovery pipeline. The metering switching solenoid valve has a first gas path and a second gas path. The first three-way valve is connected to the first gas path and the second gas path respectively. The mold release agent metering device is connected to the first gas path and the second gas path respectively. The metering switching solenoid valve switches the on / off state of the first gas path and the second gas path, thereby causing the first three-way valve to change direction and the mold release agent metering device to draw in and discharge liquid.

7. The wide pressure range release agent supply system according to claim 5 or 6, characterized in that, The mixed liquid input pipeline, the pressure delivery tank, and the mixed liquid output pipeline are connected by a second three-way valve. The second three-way valve is connected to the gas recovery pipeline through a three-way solenoid valve. The three-way solenoid valve switches the direction of the second three-way valve by switching the gas path.

8. The wide pressure range release agent supply system according to claim 7, characterized in that, A one-way valve and a mixed liquid flow meter are sequentially provided between the second three-way valve and the nozzle.

9. The wide pressure range release agent supply system according to claim 1, characterized in that, The dilution water delivery pipeline is equipped with a Y-type filter, a dilution water solenoid valve, and a dilution water flow meter from upstream to downstream.

10. The wide pressure range mold release agent supply system according to claim 1, characterized in that, Both the raw material tank and the mixing tank are equipped with level gauges.

Images