Aluminum alloy die-casting die with multi-stage cooling structure

Abstract

The utility model relates to the technical field of die-casting dies, in particular to an aluminum alloy die-casting die with a multi-stage cooling structure, which comprises a support frame, a pressure device, an upper cover, an upper die and a lower die base plate, the support frame comprises an upper plate and a lower plate which are connected through a support column, the pressure device is fixedly arranged in an inner cavity of the upper plate, and the upper cover is fixedly arranged in the inner cavity of the lower plate. The upper cover is fixedly arranged at the output end of the pressure equipment, the upper die is fixedly arranged at the bottom of the upper cover, the lower die bottom plate is located below the upper die and fixedly connected with the lower plate, the lower die is fixedly arranged at the center of the lower die bottom plate, a cavity is formed in the lower die, a lower die cooling cavity is formed in the outer wall of the lower die, and the lower die cooling cavity is fixedly connected with the lower die bottom plate. And eight groups of cooling assemblies are arranged in the lower mold cooling cavity. The circulating water pipes are distributed in a snakelike manner, and the eight groups of circulating water pipes act together, so that the flowing positions of cooling water are less, the temperature is not increased too high, and the cooling effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically to an aluminum alloy die-casting mold with a multi-stage cooling structure. Background Technology

[0002] Die casting molds are the core tooling in pressure casting: they rapidly force high-temperature molten metal into the mold cavity under high pressure. After the molten metal cools and solidifies, the mold is opened to obtain a casting of the corresponding shape. They are commonly used to produce precision parts made of materials such as aluminum alloys and zinc alloys (e.g., automotive and electronic components). During the die casting process, mold temperature control directly affects casting quality, production efficiency, and mold life—excessive temperature will cause slow cooling, coarse grains, and decreased performance, and is also prone to defects such as sticking and scratches; excessively low temperature may cause premature solidification of the molten metal, resulting in incomplete filling and cold shuts.

[0003] Currently, most die-casting molds are cooled by either water cooling or air cooling. Traditional internal water cooling involves opening cooling channels inside the mold, but the cooling range is only concentrated around the channels, making it difficult to evenly cover critical areas such as the cavity surface and complex small cores. This can easily lead to localized "hot spots," affecting the dimensional stability and internal quality of the castings. External water spraying or immersion cooling can expand the cooling area, but it also has problems such as high coolant loss, high energy consumption, damp workshops (easily generating water vapor), and poor cooling precision. Furthermore, it may shorten the service life of the mold due to rapid thermal shock. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an aluminum alloy die-casting mold with a multi-stage cooling structure, which combines water cooling, air cooling, and water mist cooling, resulting in high and uniform cooling efficiency. This solves the problem of low cooling efficiency caused by single water cooling or air cooling.

[0005] This utility model discloses an aluminum alloy die-casting mold with a multi-stage cooling structure, comprising a support frame, a pressure device, an upper cover, an upper mold, and a lower mold base plate. The support frame includes an upper plate and a lower plate connected by support columns. The pressure device is fixedly disposed in the inner cavity of the upper plate. The upper cover is fixedly disposed at the output end of the pressure device. The upper mold is fixedly disposed at the bottom of the upper cover. The lower mold base plate is located below the upper mold and is fixedly connected to the lower plate. A lower mold is fixedly disposed at the center of the lower mold base plate. The lower mold has a cavity inside. A lower mold cooling cavity is formed on the outer wall of the lower mold. Eight sets of cooling components are disposed in the lower mold cooling cavity.

[0006] The cooling assembly includes an arc-shaped plate, a fixed frame, and a circulating water pipe. The arc-shaped plate is movably disposed on the outer wall of the lower mold. The circulating water pipe is fixedly disposed inside the arc-shaped plate. The fixed frame is fixedly disposed on the inner wall of the arc-shaped plate and supports the circulating water pipe. Water mist nozzles are evenly arranged on the lower side of the outer wall of the circulating water pipe. An air guide pipe connected to the water mist nozzles is inserted into the fixed frame.

[0007] This utility model discloses an aluminum alloy die-casting mold with a multi-stage cooling structure, wherein the circulating water pipes are distributed in a serpentine pattern and are arranged at an angle, with a large distance between the lower side and the lower mold and a small distance between the upper side and the lower mold. The upper end of the circulating water pipe is the water outlet, and the lower end is the water inlet.

[0008] This utility model discloses an aluminum alloy die-casting mold with a multi-stage cooling structure. The cooling assembly further includes an annular base, which is fixedly connected to the bottom of an arc-shaped plate. An annular groove is provided on the upper surface of the lower mold base plate, and the annular base is movably inserted into the annular groove.

[0009] This utility model discloses an aluminum alloy die-casting mold with a multi-stage cooling structure, wherein a water tank is provided inside the annular base.

[0010] This utility model discloses an aluminum alloy die-casting mold with a multi-stage cooling structure, wherein the upper mold is provided with an upper mold cooling cavity, and the inner wall of the upper mold cooling cavity is uniformly fixed with air-cooling inlet pipes, and the air-cooling inlet pipes are inclined.

[0011] This utility model discloses an aluminum alloy die-casting mold with a multi-stage cooling structure, wherein the upper cover is uniformly provided with air-cooling outlets, and the inner wall of the upper cover is fixedly provided with a conical guide block that cooperates with the air-cooling outlets.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The circulating water pipes of this utility model are distributed in a serpentine pattern, and the eight sets of circulating water pipes work together to ensure that the cooling water flows through fewer places, so that the temperature will not rise too high and the cooling effect will be guaranteed.

[0014] 2. This utility model features a differentiated design for the distance between the circulating water pipe and the lower mold, ensuring that the cooling rate of each part of the mold is consistent. This effectively reduces product quality defects or damage to the mold caused by local temperature differences, ensures uniform cooling on both the upper and lower sides, and improves the cooling speed while guaranteeing the quality of the finished product.

[0015] 3. The water mist nozzle of this utility model can provide targeted cooling for localized high-temperature areas.

[0016] 4. This utility model uses water cooling, air cooling and water mist cooling together to improve the cooling speed of the product, shorten the cooling cycle after the product is formed, and thus improve productivity. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cooling cavity structure of the lower mold of this utility model;

[0020] Figure 3 This is a schematic diagram of the cooling component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the side structure of the circulating water pipe of this utility model;

[0022] Figure 5 This is a schematic diagram of the upper mold structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the upper cover structure of this utility model.

[0024] In the diagram: 1. Support frame; 2. Pressure equipment; 3. Top cover; 4. Upper mold; 5. Lower mold base plate; 6. Cavity; 7. Upper mold cooling chamber; 8. Cooling assembly; 801. Arc plate; 802. Fixing frame; 803. Circulating water pipe; 804. Water outlet; 805. Water inlet; 806. Water mist nozzle; 807. Air guide pipe; 808. Water tank; 809. Annular base; 9. Lower mold; 10. Annular groove; 11. Air-cooled air inlet pipe; 12. Conical guide block; 13. Air-cooled air outlet; 14. Lower mold cooling chamber. Detailed Implementation

[0025] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0026] Please see Figure 1-6 This utility model discloses an aluminum alloy die-casting mold with a multi-stage cooling structure, including a support frame 1, a pressure device 2, an upper cover 3, an upper mold 4, and a lower mold base plate 5. The support frame 1 includes an upper plate and a lower plate connected by support columns. The pressure device 2 is fixedly installed in the inner cavity of the upper plate. The upper cover 3 is fixedly installed at the output end of the pressure device 2. The upper mold 4 is fixedly installed at the bottom of the upper cover 3. The lower mold base plate 5 is located below the upper mold 4 and is fixedly connected to the lower plate. A lower mold 9 is fixedly installed at the center of the lower mold base plate 5. A cavity 6 is provided inside the lower mold 9. A lower mold cooling cavity 14 is opened on the outer wall of the lower mold 9. Eight sets of cooling components 8 are provided in the lower mold cooling cavity 14.

[0027] The upper mold 4 is installed on the upper cover 3. The upper mold 4 is used to connect the pressure device 2. The lower mold 9 is a circular protrusion and is fixed on the lower mold base plate 5. A cavity 6 is set inside it. A lower mold cooling cavity 14 is opened on the outer wall of the lower mold 9. Eight sets of cooling components 8 are set at the lower mold cooling cavity 14. After the eight sets of cooling components 8 are spliced ​​together, they form a ring to cool the lower mold 9. The cavity 6 in the figure is a simplified schematic shape.

[0028] The cooling assembly 8 includes an arc plate 801, a fixing frame 802, and a circulating water pipe 803. The arc plate 801 is movably disposed on the outer wall of the lower mold 9. The circulating water pipe 803 is fixedly disposed inside the arc plate 801. The fixing frame 802 is fixedly disposed on the inner wall of the arc plate 801 and supports the circulating water pipe 803. Water mist nozzles 806 are evenly disposed on the lower side of the outer wall of the circulating water pipe 803. An air guide pipe 807 connected to the water mist nozzles 806 is inserted into the fixing frame 802.

[0029] Eight circulating water pipes 803 work together to ensure cooling effect. A fixing frame 802 is set on the inner wall of the arc plate 801 to support the circulating water pipes 803. The lower side wall of the circulating water pipes 803 is evenly provided with downward-sloping water mist nozzles 806. An air guide pipe 807 is inserted into the fixing frame 802 and connected to the water mist nozzles 806. Each water mist nozzle 806 is connected to a corresponding air guide pipe 807. The water mist nozzles 806 use the water in the circulating water pipes 803 and the air in the air guide pipes 807 to form water mist sprayed out. An infrared temperature detector can be set on the arc plate 801 to measure the temperature of the lower mold 9. For areas with uneven and high temperatures, the corresponding water mist nozzles 806 are controlled to spray water mist to assist in cooling.

[0030] The number of curved plates 801 and the structures connected to them can be adjusted according to specific needs, and the position of water mist nozzles 806 can be adjusted.

[0031] The circulating water pipe 803 is distributed in a serpentine shape and is arranged at an angle. The lower side is far from the lower mold 9, while the upper side is far from the lower mold 9. The upper end of the circulating water pipe 803 is the outlet 804, and the lower end is the inlet 805.

[0032] The circulating water pipe 803 is designed to match the arc-shaped outer wall of the lower mold 9. The part of the circulating water pipe 803 near the outlet is closer to the lower mold 9, while the part near the inlet is further away from the lower mold 9. The cooling water flows from bottom to top, and the water temperature at the inlet is lower. If the distance to the lower mold 9 is equal, the lower side will cool faster, which may cause product quality defects or damage to the mold. Therefore, the inclined setting ensures that the cooling effect on both the upper and lower sides is uniform, which improves the cooling speed while ensuring the quality of the finished product.

[0033] The cooling assembly 8 also includes an annular base 809, which is fixedly connected to the bottom of the arc plate 801. An annular groove 10 is provided on the upper surface of the lower mold base plate 5, and the annular base 809 is movably inserted into the annular groove 10.

[0034] An annular groove 10 is provided on the upper surface of the lower mold base plate 5. The annular base 809 is movably disposed in the annular groove 10. When it is moved to the innermost position, the arc plate 801 fits against the outer wall of the lower mold 9. When it is moved to the outermost position, the arc plate 801 and the circulating water pipe 803 can be removed or installed.

[0035] A water tank 808 is provided inside the annular base 809. During the water mist cooling process, part of it turns into water vapor and flows out from the air outlet, while part of the liquid droplets are collected in the water tank 808.

[0036] The upper mold 4 is provided with an upper mold cooling cavity 7. The inner wall of the upper mold cooling cavity 7 is uniformly fixed with air-cooled air inlet pipes 11, and the air-cooled air inlet pipes 11 are inclined.

[0037] The upper mold cooling cavity 7 is equipped with air-cooled air inlet pipes 11 evenly installed on the inner wall. The pipes are inclined so that the cold air will flow in along the inner wall of the upper mold cooling cavity 7, which can effectively remove the heat.

[0038] The upper cover 3 has evenly spaced air-cooled outlets 13, and the inner wall of the upper cover 3 is fixed with a conical guide block 12 that matches the air-cooled outlets 13.

[0039] The inner wall of the upper cover 3 is provided with a conical guide block 12, and the air-cooled outlet 13 is evenly distributed. The airflow blown in by the air-cooled inlet pipe 11 flows upward from the middle after passing through the inner wall of the upper mold cooling cavity 7. The conical guide block 12 helps to guide the airflow to the air-cooled outlet 13, promotes airflow, and helps to improve heat dissipation.

[0040] When using this aluminum alloy die-casting mold with a multi-stage cooling structure: molten metal is injected into the mold, and the pressure device 2 drives the upper mold 4 to press down and form the mold. During the process, the annular base 809 moves to the innermost side, and eight arc-shaped plates 801 are spliced ​​together to form an annulus that fits against the lower mold 9. Cooling water is injected into the circulating water pipe 803, and the eight sets of circulating water pipes 803 work together to cool the mold. Air enters through the air guide pipe 807, and the water mist nozzle 806 uses the water in the circulating water pipe 803 and the air in the air guide pipe 807 to form a water mist that can be sprayed out. This can specifically cool the high-temperature areas and ensure uniform cooling. Cold air enters the upper mold cooling cavity 7 through the air-cooled air inlet pipe 11. The airflow blown in flows upward from the middle after passing through the inner wall of the upper mold cooling cavity 7. After being guided by the conical guide block 12, the airflow is discharged from the air-cooled air outlet 13.

[0041] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An aluminum alloy die-casting mold with a multi-stage cooling structure, comprising a support frame (1), a pressure device (2), an upper cover (3), an upper mold (4), and a lower mold base plate (5), characterized in that: The support frame (1) includes an upper plate and a lower plate connected by support columns. The pressure device (2) is fixedly installed in the inner cavity of the upper plate. The upper cover (3) is fixedly installed at the output end of the pressure device (2). The upper mold (4) is fixedly installed at the bottom of the upper cover (3). The lower mold base plate (5) is located below the upper mold (4) and is fixedly connected to the lower plate. The lower mold (9) is fixedly installed at the center of the lower mold base plate (5). The lower mold (9) has a cavity (6) inside. The lower mold (9) has a lower mold cooling cavity (14) on its outer wall. The lower mold cooling cavity (14) has eight sets of cooling components (8). The cooling assembly (8) includes an arc plate (801), a fixing frame (802), and a circulating water pipe (803). The arc plate (801) is movably disposed on the outer wall of the lower mold (9). The circulating water pipe (803) is fixedly disposed inside the arc plate (801). The fixing frame (802) is fixedly disposed on the inner wall of the arc plate (801) and supports the circulating water pipe (803). Water mist nozzles (806) are evenly disposed on the lower side of the outer wall of the circulating water pipe (803). An air guide pipe (807) connected to the water mist nozzle (806) is inserted into the fixing frame (802).

2. The aluminum alloy die-casting mold with a multi-stage cooling structure according to claim 1, characterized in that: The circulating water pipe (803) is serpentine and inclined, with a large distance between the lower side and the lower mold (9) and a small distance between the upper side and the lower mold (9). The upper end of the circulating water pipe (803) is the outlet (804) and the lower end is the inlet (805).

3. The aluminum alloy die-casting mold with a multi-stage cooling structure according to claim 1, characterized in that: The cooling assembly (8) also includes an annular base (809), which is fixedly connected to the bottom of the arc plate (801). An annular groove (10) is provided on the upper surface of the lower mold base plate (5), and the annular base (809) is movably inserted into the annular groove (10).

4. The aluminum alloy die-casting mold with a multi-stage cooling structure according to claim 3, characterized in that: A water trough (808) is provided inside the annular base (809).

5. The aluminum alloy die-casting mold with a multi-stage cooling structure according to claim 1, characterized in that: The upper mold (4) is provided with an upper mold cooling cavity (7), and the inner wall of the upper mold cooling cavity (7) is uniformly fixed with air-cooled air inlet pipes (11), and the air-cooled air inlet pipes (11) are inclined.

6. The aluminum alloy die-casting mold with a multi-stage cooling structure according to claim 1, characterized in that: The upper cover (3) is provided with air-cooled air outlets (13) evenly distributed, and the inner wall of the upper cover (3) is fixed with a conical guide block (12) that cooperates with the air-cooled air outlets (13).

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