Disc-shaped body pouring structure

Abstract

The utility model relates to the technical field of casting molds, in particular to a disc-shaped body pouring structure which comprises a disc-shaped cavity. A casting head is arranged on the cross gate; the two sub-runners are arc-shaped, the sub-runners are symmetrically arranged on the two sides of the cross gate and are communicated with the cross gate, and the sub-runners and the disc-shaped cavity are coaxially arranged; and the sub-runners are communicated with the disc-shaped mold cavity through the pouring inlets. The method has the effect of reducing the generation of hollowing or large bubbles.

Description

Technical Field

[0001] This application relates to the technical field of casting molds, and particularly to a pouring structure for a disc-shaped body. Background Art

[0002] In casting technology, the key to the design of the pouring system is to ensure that liquid metal can be evenly and effectively distributed into the cavity. Traditional pouring structures for disc-shaped bodies usually set pouring gates at any circumferential position, but it is difficult to ensure that the liquid metal fills the entire cavity from the outside to the inside in this way. In addition, if the flow path of the liquid metal is too long, it may cause the metal to cool prematurely, resulting in air pockets or large air bubbles inside the casting, thereby reducing the product quality. Summary of the Utility Model

[0003] In order to reduce the generation of air pockets or large air bubbles, this application provides a pouring structure for a disc-shaped body.

[0004] The pouring structure for a disc-shaped body provided by this application adopts the following technical solutions:

[0005] A pouring structure for a disc-shaped body includes a disc-shaped cavity; a runner, with a riser on the runner; two sub-runners, the sub-runners are arc-shaped, symmetrically arranged on both sides of the runner and connected to the runner, and the sub-runners are coaxially arranged with the disc-shaped cavity; a plurality of pouring gates, and the sub-runners are connected to the disc-shaped cavity through the pouring gates.

[0006] By adopting the above technical solutions, the sub-runners can enable the liquid metal flowing in from the riser to flow into the disc-shaped cavity through multiple pouring gates, thereby accelerating the speed at which the liquid metal fills the cavity, reducing the flow path of the liquid metal in the cavity, and avoiding premature cooling of the metal.

[0007] Optionally, the cross-sectional area of the sub-runner is inversely proportional to the distance from the sub-runner to the runner.

[0008] By adopting the above technical solutions, the liquid metal can maintain a uniform speed and pressure during the process of flowing from the runner to the sub-runner, thereby ensuring that the metal can be evenly distributed into the cavity and improving the uniformity of casting.

[0009] Optionally, the cross-sectional area of the pouring gate is inversely proportional to the distance from the pouring gate to the runner.

[0010] By adopting the above technical solutions, the design of the pouring gate can further regulate the flow of the liquid metal, making its flow rate uniform at each position when entering the cavity, and avoiding casting defects caused by uneven flow.

[0011] Optionally, it further includes a plurality of edge exhaust channels which are arranged vertically. The bottom of the edge exhaust channels is communicated with the disc-shaped cavity, and the plurality of edge exhaust channels are arranged at equal intervals along the circumferential direction of the disc-shaped cavity.

[0012] By adopting the above technical solution, the arrangement of the edge exhaust channels can timely discharge the gas around the cavity, prevent the gas from being wrapped by the molten metal to form pores, and improve the quality of the casting.

[0013] Optionally, it further includes a plurality of transition exhaust channels which are arranged vertically. The bottom of the transition exhaust channels is communicated with the disc-shaped cavity, and the plurality of transition exhaust channels are arranged at equal intervals around the central axis of the disc-shaped cavity. The distance between the transition exhaust channels and the central axis of the disc-shaped cavity is less than the radius of the disc-shaped cavity.

[0014] By adopting the above technical solution, the transition exhaust channels can reach the transition positions of the disc-shaped cavity, thereby effectively discharging the gas accumulated at the transition positions, avoiding the gas from staying inside the disc-shaped cavity, and further improving the exhaust effect.

[0015] Optionally, a transition riser is provided between the transition exhaust channels and the disc-shaped cavity.

[0016] By adopting the above technical solution, the transition riser provides a cavity for storing molten metal, supplies metal during the formation of the casting, compensates for the liquid shrinkage of the molten metal in the cavity and the shrinkage during the solidification of the casting, so as to obtain a dense casting without shrinkage cavities.

[0017] Optionally, it further includes a central exhaust channel which is arranged vertically. The bottom of the central exhaust channel is communicated with the disc-shaped cavity, and the central exhaust channel is arranged at the central axis of the disc-shaped cavity.

[0018] By adopting the above technical solution, the central exhaust channel can discharge the gas at the central part of the disc-shaped cavity, work together with the edge and transition exhaust channels, and realize all-round gas discharge.

[0019] Optionally, the edge exhaust channels and the central exhaust channel have the same aperture, and the aperture of the transition exhaust channel is smaller than that of the central exhaust channel.

[0020] By adopting the above technical solution, reducing the aperture of the transition exhaust channels can reduce the heat loss at the transition risers, make the cooling rate of the molten metal at the transition risers slower than that at other positions, so that it can supply metal during the formation of the casting.

[0021] Optionally, a plurality of cold material bins are further provided at the bottom of the disc-shaped cavity. The cold material bins communicate with the disc-shaped cavity, and the distance between the cold material bins and the central axis of the disc-shaped cavity is less than the distance between the transition exhaust channel and the central axis of the disc-shaped cavity.

[0022] By adopting the above technical solution, the cold material bin can effectively collect and store the pre-cooled metal, avoiding the influence of this metal on the subsequent casting process, thereby improving the overall quality of the casting.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The present application adopts the design of the sub-runner and the ingate, as well as its unique cross-sectional area change rule, ensuring that the liquid metal can fill the cavity evenly and quickly, reducing the internal air pockets in the casting, thereby improving the quality and production efficiency of the product;

[0025] 2. By providing various types of exhaust channels and cooperating with the transition riser and the cold material bin, the gas and impurities in the cavity are effectively removed, further improving the quality of the product. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the disc-shaped ingate structure provided by the embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of the disc-shaped ingate structure provided by the embodiment of the present application from another angle.

[0028] Description of the reference numerals: 1 - disc-shaped cavity; 2 - pouring riser; 3 - cross gate; 4 - sub-runner; 5 - ingate; 6 - edge exhaust channel; 7 - transition exhaust channel; 8 - central exhaust channel; 9 - transition riser; 10 - cold material bin. Detailed Description of the Embodiment

[0029] The following is a further detailed description of the present application in conjunction with the attached Figure 1-2 drawings.

[0030] The embodiment of the present application discloses a disc-shaped ingate structure.

[0031] As Figure 1 and Figure 2As shown in the figure, the disc-shaped pouring structure includes a disc-shaped cavity 1, a runner 3, two sub-runners 4, and multiple gates 5. A riser 2 is provided at the central position of the runner 3 for injecting liquid metal. The two sub-runners 4 are designed to be arc-shaped, symmetrically arranged on both sides of the runner 3, and are kept in communication with the runner 3. The sub-runners 4 are coaxial with the disc-shaped cavity 1 to ensure that the liquid metal can flow evenly to all parts of the disc-shaped cavity 1. To achieve the uniform inflow of liquid metal, the sub-runners 4 are connected to the disc-shaped cavity 1 through multiple gates 5.

[0032] To ensure that the liquid metal maintains a uniform velocity and pressure during the process of flowing from the runner 3 to the sub-runners 4, the cross-sectional area of the sub-runners 4 is inversely proportional to the distance between it and the runner 3. This means that the part of the sub-runner 4 closer to the runner 3 has a larger cross-sectional area, while the part farther from the runner 3 has a smaller cross-sectional area. In this embodiment, the bottom wall of the sub-runner 4 is kept horizontal, and the top wall has a slope in the direction away from the runner 3, thereby achieving a reduction in the cross-sectional area. Such a design can ensure that when the liquid metal flows in the sub-runner 4, even if part of the liquid metal flows into the disc-shaped cavity 1 through the gates 5, it can maintain a relatively stable flow rate and pressure.

[0033] Similarly, the cross-sectional area of the gates 5 is also designed to be inversely proportional to the distance between it and the runner 3. Since the cross-section of the sub-runner 4 is continuously decreasing, in order to ensure that the flow rates of the liquid metal entering the disc-shaped cavity 1 from different positions of the sub-runner 4 remain relatively consistent, the cross-sectional area of the gates 5 also decreases proportionally accordingly.

[0034] As Figure 1 and Figure 2 shown in the figure, to discharge the gas in the disc-shaped cavity 1, the disc-shaped pouring structure further includes multiple edge exhaust channels 6. The edge exhaust channels 6 are arranged in the vertical direction, and their bottoms are connected to the disc-shaped cavity 1. The multiple edge exhaust channels 6 are arranged at equal intervals around the circumference of the disc-shaped cavity 1 for timely discharging the gas in the cavity and preventing the gas from being wrapped by the liquid metal to form pores.

[0035] In addition to the edge exhaust channels 6, the disc-shaped pouring structure provided in this embodiment further includes multiple transition exhaust channels 7. The transition exhaust channels 7 are also arranged in the vertical direction, and their bottoms are also connected to the disc-shaped cavity 1. The multiple transition exhaust channels 7 are arranged at equal intervals around the central axis of the disc-shaped cavity 1, and the distance between the transition exhaust channels 7 and the central axis of the disc-shaped cavity 1 is less than the radius of the disc-shaped cavity 1, thereby effectively discharging the gas accumulated at the transition position, that is, between the center and the edge of the disc-shaped cavity 1, avoiding the retention of gas inside the disc-shaped cavity 1, and further improving the exhaust effect.

[0036] To further improve the exhaust effect, a central exhaust passage 8 is also provided at the center of the disc-shaped cavity 1. The central exhaust passage 8 is arranged in the vertical direction, and its bottom is communicated with the disc-shaped cavity 1.

[0037] As Figure 1 and Figure 2 shown, since liquid shrinkage occurs when liquid metal is in the cavity and shrinkage also occurs during the solidification of the casting, in order to compensate for the metal loss caused by shrinkage, a transition riser 9 is also provided between the transition exhaust passage 7 and the disc-shaped cavity 1. The transition riser 9 can provide a cavity for storing liquid metal, and the liquid metal in the cavity can supply metal when the casting is formed, so as to obtain a dense casting without shrinkage cavities. After the casting is completed, the remaining liquid metal in the transition riser 9 solidifies on the surface of the casting and can be removed through the turning process later.

[0038] As Figure 1 and Figure 2 shown, the edge exhaust passage 6 has the same aperture as the central exhaust passage 8, and the aperture of the transition exhaust passage 7 is smaller than that of the central exhaust passage 8. Reducing the aperture of the transition exhaust passage 7 can reduce the heat loss at the transition riser 9, making the cooling rate of the liquid metal at the transition riser 9 slower than that at other positions, so that it can supply metal when the casting is formed. At the same time, the transition exhaust passage 7 also serves as the breathing hole of the transition riser 9, keeping the internal pressure consistent with the external atmosphere and facilitating metal compensation.

[0039] As Figure 1 and Figure 2 shown, the disc-shaped body pouring structure provided in this embodiment further has a plurality of cold material bins 10 at the bottom of the disc-shaped cavity 1. The cold material bins 10 are communicated with the disc-shaped cavity 1, and the distance between them and the central axis of the disc-shaped cavity 1 is smaller than the distance between the transition exhaust passage 7 and the central axis of the disc-shaped cavity 1. The cold material bins 10 are mainly used to store the pre-cooled metal to prevent this metal from interfering with the subsequent casting process, thereby improving the overall quality of the casting.

[0040] The implementation principle of a disc-shaped body pouring structure in an embodiment of this application is as follows: Pour liquid metal into the pouring riser 2, and the liquid metal flows into the two sub-runner channels 4 through the cross runner 3 and then into the disc-shaped cavity 1 through the ingate 5. The cross-sectional area of the sub-runner channels 4 gradually becomes smaller, so that when the liquid metal flows in the sub-runner channels 4, even if part of the liquid metal flows into the disc-shaped cavity 1 through the ingate 5, it can maintain a relatively stable flow rate and pressure. Similarly, the cross-sectional area of the ingate 5 also decreases proportionally, so that the flow rates of the liquid metal entering the disc-shaped cavity 1 from different positions of the sub-runner channels 4 are relatively consistent.

[0041] The liquid metal entering the disc-shaped cavity 1 begins to extrude the air originally in the disc-shaped cavity 1, and the air is discharged from the disc-shaped cavity 1 through the edge exhaust channel 6, the transition exhaust channel 7, and the central exhaust channel 8. As the liquid metal gradually fills the disc-shaped cavity 1, the transition riser 9 is also filled with liquid metal. During the solidification of the casting, shrinkage gradually occurs. To compensate for the metal loss caused by shrinkage, the liquid metal in the transition riser 9 is replenished into the disc-shaped cavity 1, and finally a dense casting without shrinkage cavities is formed. After the casting is completed, the remaining liquid metal in the transition riser 9 solidifies on the surface of the casting, and the liquid metal in the cold slug well 10 also solidifies on the surface of the casting, and is subsequently removed through the turning process.

[0042] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A disc-shaped casting structure, characterized in that: include: A disc-shaped cavity (1); A horizontal runner (3), wherein a pouring riser (2) is provided on the horizontal runner (3); Two runners (4), the runners (4) are arc-shaped, the runners (4) are symmetrically arranged on both sides of the cross runner (3) and are connected to the cross runner (3), and the runners (4) are coaxially arranged with the disc-shaped cavity (1); A plurality of inlet gates (5), the branch channel (4) being connected to the disc-shaped cavity (1) through the inlet gates (5).

2. The disc-shaped casting structure according to claim 1, characterized in that: The cross-sectional area of ​​the runner (4) is inversely proportional to the distance between the runner (4) and the runner (3).

3. The disc-shaped casting structure according to claim 1, characterized in that: The cross-sectional area of ​​the inlet gate (5) is inversely proportional to the distance between the inlet gate (5) and the runner (3).

4. The disc-shaped casting structure according to claim 1, characterized in that: It also comprises a plurality of edge exhaust channels (6), wherein the edge exhaust channels (6) are arranged in a vertical direction, the bottom of the edge exhaust channels (6) is connected to the disc-shaped cavity (1), and the plurality of edge exhaust channels (6) are arranged at equal intervals around the circumference of the disc-shaped cavity (1).

5. The disc-shaped casting structure according to claim 4, characterized in that: It also includes a plurality of transition exhaust channels (7), wherein the transition exhaust channels (7) are arranged in a vertical direction, the bottom of the transition exhaust channels (7) is connected to the disc-shaped cavity (1), the plurality of transition exhaust channels (7) are arranged at equal intervals around the central axis of the disc-shaped cavity (1), and the distance between the transition exhaust channels (7) and the central axis of the disc-shaped cavity (1) is less than the radius of the disc-shaped cavity (1).

6. The disc-shaped casting structure according to claim 5, characterized in that: A transition riser (9) is provided between the transition exhaust passage (7) and the disc-shaped cavity (1).

7. The disc-shaped casting structure according to claim 5, characterized in that: It also comprises a central exhaust channel (8), the central exhaust channel (8) being arranged in a vertical direction, the bottom of the central exhaust channel (8) being connected to the disc-shaped cavity (1), and the central exhaust channel (8) being arranged at the central axis of the disc-shaped cavity (1).

8. The disc-shaped casting structure according to claim 7, characterized in that: The aperture of the edge exhaust channel (6) is the same as that of the central exhaust channel (8), and the aperture of the transition exhaust channel (7) is smaller than that of the central exhaust channel (8).

9. The disc-shaped casting structure according to claim 5, characterized in that: A plurality of cold material bins (10) are also provided at the bottom of the disc-shaped cavity (1), the cold material bins (10) being connected to the disc-shaped cavity (1), and the distance between the cold material bins (10) and the central axis of the disc-shaped cavity (1) being smaller than the distance between the transition exhaust channel (7) and the central axis of the disc-shaped cavity (1).

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