A low pressure casting machine cooling device

Abstract

A low pressure casting machine cooling device, including connecting mould cooling channel import and export cooling medium input assembly and cooling medium output assembly, cooling medium input assembly includes water inlet pipe, flow control valve, liquid solenoid valve, air inlet pipe, gas flow valve, gas solenoid valve, gas and water change-over switch, cooling medium input pipeline, water inlet pipe, flow control valve, liquid solenoid valve, cooling medium input pipeline are sequentially connected, and the tail end of cooling medium input pipeline is connected with the inlet end of mould cooling channel, and air inlet pipe, gas flow valve, gas solenoid valve, cooling medium input pipeline are sequentially connected, and the control end of liquid solenoid valve and gas solenoid valve is connected with gas and water change-over switch respectively, cooling medium output assembly includes gas and water separator, exhaust pipe and backwater pipe, adopt the utility model low pressure casting machine can be freely switched in water cooling mode and compressed air cooling mode, improve the versatility of low pressure casting machine and reduce production cost.

Description

Technical Field

[0001] This utility model relates to a cooling device, and more particularly to a cooling device for a low-pressure casting machine. Background Technology

[0002] Low-pressure casting machines are general-purpose equipment for low-pressure casting of aluminum alloys, widely used in the production of various aluminum alloy castings. When producing aluminum alloy castings on a low-pressure casting machine, the casting mold needs to be connected to a cooling system. The solidification process of the casting directly determines its internal structure and surface condition. The cooling system can control the mold temperature, fundamentally reducing casting defects and improving performance. For example, controlling the solidification sequence through the cooling system can eliminate internal porosity and shrinkage cavities. Controlling the cooling system can also refine grains, improve the mechanical properties of the casting, and enhance surface quality.

[0003] Existing low-pressure casting machines primarily use water cooling and compressed air cooling systems for their molds. Water cooling offers extremely high efficiency, rapidly removing large amounts of heat with low operating costs, and the water medium is inexpensive and recyclable. Compressed air cooling leaves no liquid residue, avoiding the risks of mold rust and water channel blockage, but its cooling efficiency is lower and operating costs are relatively higher. Materials with high thermal conductivity, requiring rapid solidification to refine grains and reduce porosity, and possessing good high-temperature strength, are less prone to cracking due to rapid cooling; these are preferred for water cooling. Materials with low thermal conductivity, high high-temperature brittleness, and a tendency to crack or deform easily upon rapid cooling are preferred for compressed air cooling. Currently, some low-pressure casting machines use water cooling while others use compressed air cooling. Generally, casting manufacturers select different low-pressure casting machines based on the casting material. Low-pressure casting machines are not interchangeable; manufacturers producing castings of multiple materials need to configure both water-cooled and compressed air-cooled low-pressure casting machines, resulting in high equipment costs and requiring significant production space. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a cooling device for a low-pressure casting machine that can freely switch between water cooling and compressed air cooling, thereby improving the versatility of the low-pressure casting machine and effectively reducing production costs.

[0005] The technical solution adopted by this utility model to achieve the above objectives is as follows: a cooling device for a low-pressure casting machine, comprising a cooling medium input component and a cooling medium output component. The cooling medium input component is connected to the inlet end of the mold cooling channel, and the cooling medium output component is connected to the outlet end of the mold cooling channel. The cooling medium input component includes a water inlet pipe, a flow control valve, a liquid solenoid valve, an air inlet pipe, a gas flow valve, a gas solenoid valve, a gas-water conversion switch, and a cooling medium input pipe. The outlet end of the water inlet pipe is connected to the input end of the flow control valve, and the output end of the flow control valve is then connected to the input end of the liquid solenoid valve. The output end of the liquid solenoid valve is connected to the cooling medium input pipe. The front end of the medium input pipeline is connected to the mold cooling channel inlet end, the rear end of the cooling medium input pipeline is connected to the mold cooling channel inlet end, the air inlet pipe outlet end is connected to the gas flow valve inlet end, the gas flow valve outlet end is connected to the gas solenoid valve inlet end, the gas solenoid valve outlet end is connected to the front end of the cooling medium input pipeline, the control ends of the liquid solenoid valve and the gas solenoid valve are respectively connected to the gas-water conversion switch, and the gas-water conversion switch is connected to the main control box; the cooling medium output component includes a gas-water separator, an exhaust pipe and a return water pipe, the gas-water separator inlet end is connected to the mold cooling channel outlet end through a pipeline, and the gas-water separator outlet end is connected to the exhaust pipe and the return water pipe respectively.

[0006] A further technical solution of this utility model is: the rear end of the water inlet pipe is first connected to a water storage tank and then connected in parallel to multiple flow control valves. The output end of each flow control valve is connected to a liquid solenoid valve. The output end of each liquid solenoid valve is connected to the corresponding cooling medium input pipe. The control end of each liquid solenoid valve is connected to a gas-water conversion switch.

[0007] A further technical solution of this utility model is: the rear end of the air inlet pipe is first connected to a gas storage tank and then connected in parallel to multiple gas flow valves. The output end of each gas flow valve is connected to a gas solenoid valve. The output end of each gas solenoid valve is connected to the corresponding cooling medium input pipe. The control end of each gas solenoid valve is connected to a gas-water conversion switch.

[0008] A further technical solution of this utility model is: a pressure gauge and a check valve are connected in series in each cooling medium input pipe at the rear end of the liquid solenoid valve and the gas solenoid valve.

[0009] This utility model discloses a cooling device for a low-pressure casting machine, which has the following advantages: A water inlet pipe, a flow control valve, and a liquid solenoid valve are connected to the front end of the cooling medium input pipeline, as well as an air inlet pipe, a gas flow valve, and a gas solenoid valve. A gas-water conversion switch controls the flow of water and air into the cooling medium input pipeline and into the mold. This allows for flexible selection of water cooling or compressed air cooling based on the properties of the product material, improving the versatility of the low-pressure casting machine and effectively reducing production costs. The cooling medium output component features a gas-water separator; the separated cooling water can be reused after entering the return water pipe, further reducing production costs. Multiple flow control valves and liquid solenoid valves are connected to the rear end of the water inlet pipe, and multiple gas flow valves and gas solenoid valves are connected in parallel to the rear end of the air inlet pipe, enabling precise control of the cooling medium flow in each input pipeline. Each cooling medium input pipeline is connected in series with a pressure gauge and a check valve. The pressure gauge detects the pressure, and the check valve prevents backflow of the cooling medium, further ensuring stability and cooling efficiency.

[0010] The following description, in conjunction with the accompanying drawings and embodiments, further illustrates a cooling device for a low-pressure casting machine according to the present invention. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a cooling device for a low-pressure casting machine according to this utility model; Reference numerals: 1-Inlet pipe, 2-Flow control valve, 3-Liquid solenoid valve, 4-Water storage tank, 5-Gas-water conversion switch, 6-Main control box, 7-Cooling medium input pipe, 8-Check valve, 9-Pressure gauge, 10-Integrated block, 11-Gas solenoid valve, 12-Gas flow valve, 13-Gas storage tank, 14-Inlet pipe, 15-Mold, 16-Gas-water separator, 17-Exhaust pipe, 18-Return water pipe. Detailed Implementation

[0012] like Figure 1 As shown, this utility model discloses a cooling device for a low-pressure casting machine, used to cool the casting workpiece inside the mold of a low-pressure casting machine. It includes a cooling medium input component and a cooling medium output component. The cooling medium input component is connected to the inlet end of the cooling channel of the mold 15, and the cooling medium output component is connected to the outlet end of the cooling channel of the mold 15. The mold 15 is provided with a cooling channel (not shown in the figure). The cooling channel of the low-pressure casting machine mold is an existing design, and its structure will not be described in detail here.

[0013] like Figure 1As shown, the cooling medium input assembly includes a water inlet pipe 1, a flow control valve 2, a liquid solenoid valve 3, an air inlet pipe 14, a gas flow valve 12, a gas solenoid valve 11, a gas-water conversion switch 5, and a cooling medium input pipe 7. These components can respectively form a water-cooled input channel and a compressed air input channel. The structure of the water-cooled input channel is as follows: the output end of the water inlet pipe 1 is connected to the input end of the flow control valve 2, the output end of the flow control valve 2 is then connected to the input end of the liquid solenoid valve 3, the output end of the liquid solenoid valve 3 is connected to the front end of the cooling medium input pipe 7, and the end of the cooling medium input pipe 7 is connected to the inlet end of the cooling channel of the mold 15. The inlet pipe 1 is connected to a water storage tank 4 at its rear end, followed by multiple flow control valves 2 in parallel. Each flow control valve 2 has an output connected to a liquid solenoid valve 3. Each liquid solenoid valve 3's output is connected to a corresponding cooling medium input pipe 7. Each liquid solenoid valve 3's control end is connected to a gas-water conversion switch 5. The gas-water conversion switch 5 is then connected to a main control box 6, which controls the operation of the gas-water conversion switch 5. The main control box 6 is existing equipment and will not be described in detail here. A pressure gauge 9 and a check valve 8 are connected in series in each cooling medium input pipe 7 at the rear end of the liquid solenoid valve 3. In this embodiment, eight flow control valves 2 are connected in parallel at the rear end of the water storage tank 4. Eight liquid solenoid valves 3 are connected to the rear ends of the eight flow control valves 2. The eight liquid solenoid valves 3 are connected to the front ends of eight cooling medium input pipes 7. The ends of the eight cooling medium input pipes 7 are connected to the inlet of the cooling channel of the mold 15. Pressure gauges 9 and check valves 8 are connected in series in each of the eight cooling medium input pipes 7. The compressed air input channel structure is as follows: the output end of the inlet pipe 14 is connected to the input end of the gas flow valve 12, the output end of the gas flow valve 12 is then connected to the input end of the gas solenoid valve 11, and the output end of the gas solenoid valve 11 is connected to the front end of the cooling medium input pipeline 7. The rear end of the inlet pipe 14 is first connected to the air storage tank 13, then multiple gas flow valves 12 are connected in parallel. The output end of each gas flow valve 12 is connected to a gas solenoid valve 11, and the output end of each gas solenoid valve 11 is connected to the corresponding cooling medium input pipeline 7. The control end of each gas solenoid valve 11 is connected to the gas-water conversion switch 5. In this embodiment, eight gas flow valves 12 are connected in parallel to the rear end of the air storage tank 13, and eight gas solenoid valves 11 are respectively connected to the rear ends of the eight gas flow valves 12. The eight gas solenoid valves 11 are respectively connected to the front ends of eight cooling medium input pipelines 7, and the ends of the eight cooling medium input pipelines 7 are connected to the inlet end of the cooling channel of the mold 15. The control end of the gas solenoid valve 11 is connected to the gas-water conversion switch 5, and the gas-water conversion switch 5 is then connected to the main control box 6.A pressure gauge 9 and a check valve 8 are connected in series in each cooling medium input pipe 7 downstream of the gas solenoid valve 11. The cooling medium input pipe 7 downstream of the gas solenoid valve 11 is shared with the cooling medium input pipe 7 downstream of the liquid solenoid valve 3. Each cooling medium input pipe 7 is connected in series with a pressure gauge 9 and a check valve 8. The pressure gauge 9 detects the pressure, and the check valve 8 prevents the cooling medium from flowing back, further ensuring stability and cooling efficiency. Of course, the number of cooling medium input pipes 7 is determined according to the structure of the cooling channels of the mold 15. Different structures of the cooling channels of the mold 15 may result in different numbers of cooling medium input pipes 7. If the number of cooling channels of the mold is less than eight, the liquid solenoid valve 3 or the gas solenoid valve 11 in some of the cooling medium input pipes 7 can be shut down by the control box to accommodate the number of cooling channels of the mold.

[0014] like Figure 1 As shown, the cooling medium output assembly includes a gas-water separator 16, an exhaust pipe 17, and a return water pipe 18. The input end of the gas-water separator 16 is connected to the cooling channel outlet end of the mold 15 via a pipe, and the output end of the gas-water separator 16 is connected to the exhaust pipe 17 and the return water pipe 18, respectively. A gas-water separator is a device used to separate liquid water from gas. Since the gas-water separator is an existing device, its structure will not be described in detail here. When the cooling medium is water, it flows out through the return water pipe 18 after passing through the gas-water separator 16. After the cooling water is cooled, it flows back to the inlet pipe 1 for reuse. When the cooling medium is compressed air, it is discharged outdoors through the exhaust pipe 17 after passing through the gas-water separator 16.

[0015] During operation, the cooling device of this utility model for a low-pressure casting machine is connected to both ends of the mold 15 of the low-pressure casting machine. The cooling method (water cooling or compressed air cooling) is selected based on the properties of the material being cast. If the casting product is made of a material with high thermal conductivity and good high-temperature strength, water cooling is selected. In this case, the gas solenoid valve 11 is fully closed and the liquid solenoid valve 3 is open via the gas-water conversion switch 5. Cooling water enters the cooling channel of the mold 15 through the cooling medium input pipe 7 from the liquid solenoid valve 3 to cool the casting. If the casting product is made of a material with low thermal conductivity and high high-temperature brittleness, compressed air cooling is selected. In this case, the liquid solenoid valve 3 is fully closed and the gas solenoid valve 11 is open via the gas-water conversion switch 5. Cooling compressed air enters the cooling channel of the mold 15 through the cooling medium input pipe 7 from the gas solenoid valve 11 to cool the casting.

[0016] The above embodiments are merely preferred embodiments of this utility model. The structure of this utility model is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cooling device for a low-pressure casting machine, comprising a cooling medium input component and a cooling medium output component, wherein the cooling medium input component is connected to the inlet end of the cooling channel of the mold (15), and the cooling medium output component is connected to the outlet end of the cooling channel of the mold (15), characterized in that, The cooling medium input assembly includes a water inlet pipe (1), a flow control valve (2), a liquid solenoid valve (3), an air inlet pipe (14), a gas flow valve (12), a gas solenoid valve (11), a gas-water conversion switch (5), and a cooling medium input pipeline (7). The output end of the water inlet pipe (1) is connected to the input end of the flow control valve (2), the output end of the flow control valve (2) is then connected to the input end of the liquid solenoid valve (3), the output end of the liquid solenoid valve (3) is connected to the front end of the cooling medium input pipeline (7), the end of the cooling medium input pipeline (7) is connected to the inlet end of the cooling channel of the mold (15), and the output end of the air inlet pipe (14) is connected to the input end of the gas flow valve (12). The gas flow valve (12) output is connected to the gas solenoid valve (11) input, the gas solenoid valve (11) output is connected to the front end of the cooling medium input pipe (7), the liquid solenoid valve (3) and the gas solenoid valve (11) control ends are connected to the gas-water conversion switch (5) respectively, and the gas-water conversion switch (5) is connected to the main control box (6); the cooling medium output component includes a gas-water separator (16), an exhaust pipe (17) and a return water pipe (18), the gas-water separator (16) input end is connected to the cooling channel outlet end of the mold (15) through a pipe, and the gas-water separator (16) output end is connected to the exhaust pipe (17) and the return water pipe (18) respectively.

2. The cooling device for a low-pressure casting machine as described in claim 1, characterized in that, The water inlet pipe (1) is first connected to a water storage tank (4) and then connected in parallel to multiple flow control valves (2). The output end of each flow control valve (2) is connected to a liquid solenoid valve (3). The output end of each liquid solenoid valve (3) is connected to the corresponding cooling medium input pipe (7). The control end of each liquid solenoid valve (3) is connected to the gas-water conversion switch (5).

3. The cooling device for a low-pressure casting machine as described in claim 1, characterized in that, The rear end of the air inlet pipe (14) is first connected to the gas storage tank (13) and then connected in parallel to multiple gas flow valves (12). The output end of each gas flow valve (12) is connected to a gas solenoid valve (11). The output end of each gas solenoid valve (11) is connected to the corresponding cooling medium input pipe (7). The control end of each gas solenoid valve (11) is connected to the gas-water conversion switch (5).

4. A low-pressure casting machine cooling device as described in claim 2 or 3, characterized in that, A pressure gauge (9) and a check valve (8) are connected in series in each cooling medium input pipe (7) at the rear end of the liquid solenoid valve (3) and the gas solenoid valve (11).

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