Damper shell casting mold

Abstract

The utility model relates to the technical field of casting molds, in particular to a damper shell casting mold which comprises an upper mold plate and a lower mold plate, a plurality of mold cavities with the same shape as a damper shell are formed between the upper mold plate and the lower mold plate, and every two mold cavities are arranged in a central symmetry mode according to the center position of the upper mold plate. The lower mould plate is provided with a transverse pouring gate, the transverse pouring gate is communicated with the cavities through a lower inner pouring gate, a straight pouring gate and a plurality of main risers which are communicated with the transverse pouring gate are arranged at the central position of the upper mould plate, the straight pouring gate is positioned at the central position of the transverse pouring gate, the main risers are in one-to-one correspondence with the cavities, and the main risers are communicated with the transverse pouring gate through a lower inner pouring gate. And the main riser is communicated with the cavity through an upper ingate. 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 casting mold for a damper housing. Background Art

[0002] A damper is a device that provides motion resistance and dissipates motion energy, and has important applications in multiple industries. The quality of the damper housing directly affects its performance and service life. Currently, the casting process is mostly used to manufacture the damper housing. However, the sand box mold is limited by the design of the sand core and the casting system. As the molten iron is injected into the cavity, the flow velocity of the molten iron gradually decreases with the distance from the sprue. The long flow path will also cause the molten iron to cool prematurely, resulting in air pockets and large bubbles, leading to casting failure. Summary of the Utility Model

[0003] In order to reduce the generation of air pockets or large bubbles, this application provides a casting mold for a damper housing.

[0004] A casting mold for a damper housing provided by this application adopts the following technical solutions:

[0005] A casting mold for a damper housing includes an upper mold plate and a lower mold plate. A plurality of cavities having the same shape as the damper housing are formed between the upper mold plate and the lower mold plate. The cavities are symmetrically arranged in pairs according to the central position of the upper mold plate. A cross gate is provided on the lower mold plate, and the cross gate is connected to the cavity through a lower ingate. A sprue and a plurality of main risers connected to the cross gate are provided at the central position of the upper mold plate. The sprue is located at the center of the cross gate. The main risers correspond to the cavities one by one, and the main risers are connected to the cavity through an upper ingate.

[0006] By adopting the above technical solutions, the cavities that are symmetrically arranged in pairs can make the lower ingates communicating the cavities and the cross gate also symmetrically arranged in pairs. Also, since the sprue is located at the center of the cross gate, the flow paths of the molten metal entering the cross gate from the sprue and leaving the cross gate through the lower ingate are also relatively symmetric. Furthermore, the flow velocity and pressure of the molten metal flowing from the connection between the sprue and the cross gate and flowing to the cross gates on both sides of the sprue are relatively consistent.

[0007] Optionally, the main riser is located at the intersection of the lower ingate and the cross gate.

[0008] By adopting the above technical solution, the main riser provides a cavity for storing liquid metal, supplies metal during the formation of the casting, compensates for the liquid shrinkage of the liquid metal in the cavity and the shrinkage during the solidification of the casting, so as to obtain a dense casting without shrinkage cavities. When the casting cools in the mold, the part farthest from the lower internal runner solidifies first, and its shrinkage can be compensated by the part farther from the lower internal runner; when the part farther from the lower internal runner solidifies, it can be compensated by the part closest to the lower internal runner, and when the part closest to the lower internal runner begins to solidify, it is compensated by the main riser located at the intersection position.

[0009] Optionally, the upper internal runner is connected to the lower internal runner.

[0010] By adopting the above technical solution, the liquid metal can flow smoothly in the upper and lower internal runners, which is beneficial to the rapid feeding of the liquid metal.

[0011] Optionally, the cross-sectional area of the horizontal runner is inversely proportional to the distance from the vertical runner.

[0012] By adopting the above technical solution, the liquid metal can maintain a uniform speed and pressure during the process of flowing from the vertical runner to the horizontal runner, so as to ensure that the liquid metal can enter the cavity at a uniform speed, improving the uniformity of casting.

[0013] Optionally, the cross-sectional areas of both the upper internal runner and the lower internal runner are inversely proportional to the distance from the vertical runner.

[0014] By adopting the above technical solution, the upper internal runner and the lower internal runner can further regulate the flow of the liquid metal, making its flow rate uniform when leaving the horizontal runner from each position, and avoiding casting defects caused by uneven flow.

[0015] Optionally, a main exhaust channel is further provided on the upper mold plate. The main exhaust channel is arranged vertically, the bottom of the main exhaust channel is connected to the cavity, and the main exhaust channel is located at one end of the cavity far from the lower internal runner.

[0016] By adopting the above technical solution, the gas in the cavity can be effectively exhausted, ensuring no bubbles are generated during the casting process.

[0017] Optionally, it further includes a plurality of auxiliary exhaust channels. The auxiliary exhaust channels are arranged vertically, and the bottoms of the auxiliary exhaust channels are connected to the cavity.

[0018] By adopting the above technical solution, it can assist the main exhaust channel in exhausting gas, further improving the exhaust effect during the casting process, and thus avoiding the generation of air pockets and bubbles.

[0019] Optionally, it further includes a plurality of auxiliary risers, which are arranged on the upper mold plate and communicated with the cavity, and each auxiliary riser is at least communicated with one auxiliary exhaust channel.

[0020] By adopting the above technical solution, the auxiliary riser can assist the main riser to make compensation when the casting shrinks.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By using a plurality of cavities, mass production is realized, the casting efficiency is improved, and the centrosymmetric arrangement ensures uniform distribution of the liquid metal in the sand box, which is beneficial to improving the casting quality of the damper housing;

[0023] 2. By changing the variation law of the cross-sectional areas of the horizontal runner, the upper inner runner and the lower inner runner, it is ensured that the liquid metal can uniformly fill the cavity, reducing the internal air pockets in the casting, thereby improving the product quality and production efficiency;

[0024] 3. By arranging the auxiliary riser to assist the main riser, the upper inner runner and the lower inner runner, the molten metal in the cavity can be quickly compensated and exhausted, effectively improving the casting quality of the damper housing. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the upper mold plate of the damper housing casting mold provided by the embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of the lower mold plate of the damper housing casting mold provided by the embodiment of the present application.

[0027] Description of the reference numerals: 1 - upper mold plate; 2 - lower mold plate; 3 - cavity; 4 - sprue; 5 - horizontal runner; 6 - main riser; 7 - main exhaust channel; 8 - auxiliary exhaust channel; 9 - auxiliary riser; 10 - upper inner runner; 11 - lower inner runner; 12 - screw hole; 13 - fixing pin. Detailed Embodiment

[0028] The following will further describe the present application in detail Figure 1-2 in conjunction with the appended

[0029] The embodiment of the present application discloses a damper housing casting mold.

[0030] As Figure 1 and Figure 2As shown, the casting mold of the damper housing includes an upper mold plate 1 and a lower mold plate 2. To facilitate the relative fixation of the upper mold plate 1 and the lower mold plate 2, screw holes 12 for mating with fixing pins 13 are provided on both sides of the upper mold plate 1 and the lower mold plate 2. A plurality of cavities 3 that are completely consistent with the shape of the damper housing are formed between the upper mold plate 1 and the lower mold plate 2. The cavities 3 are arranged in a centrosymmetric manner according to the central position of the upper mold plate 1 between each pair. A cross gate 5 is configured on the lower mold plate 2, and the cross gate 5 is connected to each cavity 3 via a lower internal runner 11. At the central position of the upper mold plate 1, a sprue 4 connected to the cross gate 5 is provided, and the sprue 4 is located at the central position of the cross gate 5. A plurality of main risers 6 are also provided on the upper mold plate 1. Each main riser 6 corresponds to a cavity 3 one by one and is connected to the cavity 3 through an upper internal runner 10.

[0031] Specifically, the main riser 6 is located at the intersection of the lower internal runner 11 and the cross gate 5, and at the same time, the upper internal runner 10 is connected to the lower internal runner 11. The main riser 6 provides a cavity for storing liquid metal, supplies metal during the formation of the casting, compensates for the liquid shrinkage of the liquid metal in the cavity 3 and the shrinkage during the solidification of the casting, so as to obtain a dense casting without shrinkage cavities. When the casting cools in the mold, the part farthest from the lower internal runner 11 solidifies first, and its shrinkage can be compensated by the part farther from the lower internal runner 11; when the part farther from the lower internal runner 11 solidifies, it can be compensated by the part closest to the lower internal runner 11, and when the part closest to the lower internal runner 11 starts to solidify, it is compensated by the main riser 6 located at the intersection. The interconnected upper internal runner 10 and lower internal runner 11 expand the flow area of the molten metal, enabling the molten metal to flow smoothly in the upper and lower internal runners 11, which is conducive to the rapid feeding of the molten metal.

[0032] As Figure 1 and Figure 2 shown, to ensure that the molten metal maintains a uniform speed and pressure during the process of flowing from the sprue 4 to the cross gate 5, the cross-sectional area of the cross gate 5 is inversely proportional to the distance between it and the sprue 4. This means that the part of the cross gate 5 closer to the sprue 4 has a larger cross-sectional area, while the part farther from the sprue 4 has a smaller cross-sectional area. In this embodiment, the top wall of the cross gate 5 remains horizontal, and the bottom wall has a slope rising away from the sprue 4 direction, thereby achieving a reduction in the cross-sectional area. Such a design can ensure that when the molten metal flows in the cross gate 5, even if part of the molten metal flows into the cavity 3 from the lower internal runner 11, it can maintain a relatively stable flow rate and pressure.

[0033] Similarly, the cross-sectional areas of the upper ingates 10 and the lower ingates 11 are also designed to be inversely proportional to the distance between them and the sprue 4. As the cross-sectional area of ​​the runner 5 is continuously reduced, in order to ensure that the flow rate of the liquid metal leaving different positions of the runner 5 remains relatively consistent, the cross-sectional areas of the upper ingates 10 and the lower ingates 11 are also proportionally reduced accordingly.

[0034] like Figure 1 and Figure 2 As shown, in order to further improve the casting effect, the upper mold plate 1 is also equipped with a main exhaust channel 7. The channel extends in the vertical direction, and its bottom is directly connected to the cavity 3. Further, in order to be able to exhaust all the gas in the cavity 3, the main exhaust channel 7 is located at one end of the cavity 3 away from the lower ingrate 11, thereby ensuring that the gas in the cavity 3 can be efficiently exhausted and reducing the generation of bubbles.

[0035] like Figure 1 and Figure 2 As shown, a plurality of auxiliary exhaust channels 8 are also provided at the mold cavity 3. The auxiliary exhaust channels 8 are also arranged in the vertical direction, and the bottom of the auxiliary exhaust channels 8 is also connected to the mold cavity 3. It can assist the main exhaust channel 7 in exhausting, further improving the exhaust effect during the casting process, thereby avoiding the generation of hollows and bubbles.

[0036] like Figure 1 and Figure 2 As shown, the upper mold plate 1 is also provided with a plurality of auxiliary risers 9, which correspond to the mold cavity 3 one by one and are interconnected. Each auxiliary riser 9 is interconnected with at least one auxiliary exhaust channel 8. During the casting process, the liquid metal can fill the auxiliary riser 9, so that the auxiliary riser 9 can assist the main riser 6 in compensation when the casting shrinks. The auxiliary exhaust channel 8 connected to the auxiliary riser 9 can act as a breathing hole, so that the internal pressure of the auxiliary riser 9 is consistent with the external atmosphere, which is convenient for compensating the metal. In addition, the aperture of the auxiliary exhaust channel 8 is smaller than the main exhaust channel 7. On the one hand, the part away from the upper ingrate 10 and the lower ingrate 11 can be cooled first, and on the other hand, the heat loss at the auxiliary riser 9 can be reduced, so that the cooling rate of the liquid metal at the auxiliary riser 9 is lower than that at the main exhaust channel 7, so that it can replenish the metal when the casting is formed.

[0037] The implementation principle of a damper housing casting mold in the embodiment of the present application is:

[0038] Pour liquid metal into the sprue 4. The liquid metal flows into the runner 5 through the sprue 4, and then flows into the cavity 3 through the upper ingate 10 and the lower ingate 11. The cross-sectional area of the runner 5 gradually decreases, so that when the liquid metal flows in the runner 5, even if part of the liquid metal flows into the cavity 3 through the upper ingate 10 and the lower ingate 11, it can maintain a relatively stable flow rate and pressure. Similarly, the cross-sectional areas of the upper ingate 10 and the lower ingate 11 also decrease proportionally, so that the flow rates of the liquid metal leaving different positions of the runner 5 are relatively consistent.

[0039] The liquid metal entering the cavity 3 begins to squeeze the original air in the cavity 3, and the air is discharged from the cavity 3 through the main exhaust channel 7 and the auxiliary exhaust channel 8. As the liquid metal gradually fills the cavity 3, the auxiliary 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 main riser 6 and the auxiliary riser 9 is replenished into the cavity 3, and finally a dense casting without shrinkage cavities is formed. After the casting is completed, the remaining liquid metal in the auxiliary riser 9 solidifies on the surface of the casting and is removed in the subsequent turning process.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. 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 damper housing casting mold, characterized in that: include: An upper mold plate (1) and a lower mold plate (2), a plurality of mold cavities (3) having the same shape as the damper housing are provided between the upper mold plate (1) and the lower mold plate (2), the mold cavities (3) are arranged symmetrically in pairs according to the central position of the upper mold plate (1), a cross runner (5) is provided on the lower mold plate (2), the cross runner (5) is connected to the mold cavity (3) through a lower ingrow (11), a straight runner (4) connected to the cross runner (5) and a plurality of main risers (6) are provided at the central position of the upper mold plate (1), the straight runner (4) is located at the center of the cross runner (5), the main risers (6) correspond to the mold cavities (3) one by one, and the main risers (6) are connected to the mold cavity (3) through an upper ingrow (10).

2. The damper housing casting mold according to claim 1, characterized in that: The main riser (6) is located at the intersection of the lower ingrate (11) and the runner (5).

3. The damper housing casting mold according to claim 2, characterized in that: The upper ingrate (10) is communicated with the lower ingrate (11).

4. The damper housing casting mold according to claim 3, characterized in that: The cross-sectional area of ​​the horizontal runner (5) is inversely proportional to the distance between the horizontal runner (5) and the vertical runner (4).

5. The damper housing casting mold according to claim 4, characterized in that: The cross-sectional areas of the upper ingrate (10) and the lower ingrate (11) are both inversely proportional to the distance between them and the straight runner (4).

6. The damper housing casting mold according to claim 1, characterized in that: The upper mold plate (1) is also provided with a main exhaust channel (7), the main exhaust channel (7) being arranged in a vertical direction, the bottom of the main exhaust channel (7) being connected to the mold cavity (3), and the main exhaust channel (7) being located at an end of the mold cavity (3) away from the lower ingender (11).

7. The damper housing casting mold according to claim 6, characterized in that: It also comprises a plurality of auxiliary exhaust channels (8), wherein the auxiliary exhaust channels (8) are arranged in a vertical direction, and the bottom of the auxiliary exhaust channels (8) is connected to the mold cavity (3).

8. The damper housing casting mold according to claim 7, characterized in that: It also comprises a plurality of auxiliary risers (9), wherein the auxiliary risers (9) are arranged on the upper mold plate (1) and are connected to the mold cavity (3), and each of the auxiliary risers (9) is connected to at least one of the auxiliary exhaust channels (8).

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