Filtering cap for casting of aluminium alloys

Abstract

The utility model discloses a filter cap for aluminum alloy casting, including cap body, the cap body includes the cap body part of circular truncated cone shape, and the bottom surface middle part of cap body part is shaped with the inner chamber that extends upwards, and the bottom of inner chamber is the cap mouth, the bottom end outside wall of cap body part is shaped with the annular edge part that extends horizontally to the outside in radial direction, and the outside wall wall of annular edge part is shaped with the outer conical sleeve body part that extends upwards to the outside, and the outside wall of outer conical sleeve body part cooperates with the inside wall of upper portion mounting position of sprue bushing. It simple structure, convenient to manufacture, and the top and bottom edge of its cap body part are strengthened, so that it is not easy to deform, and the filtering effect is good.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub processing technology, and more specifically to a filter cap for aluminum alloy casting. Background Technology

[0002] Currently, due to market demand, the quality requirements for aluminum alloy castings are becoming increasingly stringent. Therefore, filter caps are needed to filter the molten aluminum alloy castings and improve the casting quality.

[0003] Currently, castings that use filtration products include: wheel hubs, steering knuckles, cylinder blocks, cylinder heads, pistons, vehicle frames, turbocharger housings, etc., and the casting processes involved include: gravity casting, low-pressure casting, differential pressure casting, etc.

[0004] When in use, it needs to be fitted onto the sprue sleeve. During use, the upper mold's flow divider cone presses against the top surface of the filter cap to fix it. Molten aluminum alloy passes through the filter cap from the bottom and is then poured. However, because the upper mold's flow divider cone presses against the top surface of the filter cap, the middle part of the top plate of the cap body is prone to deformation. Moreover, since the entire filter cap is made of stainless steel mesh, its strength is limited and it is easily deformed. Furthermore, the existing filter cap structure has a frustum-shaped cap body with a radially extending edge formed at the bottom. This radially extending edge presses against the bottom surface of the upper large-diameter hole section of the stepped conical through hole in the middle of the sprue sleeve to achieve fixation. When the filter cap deforms due to the bottom pressure of the flow divider cone, its bottom radially extending edge will also deform, which may result in the inability to cover the top of the small-diameter hole section of the stepped conical through hole in the middle of the sprue sleeve. This causes some molten aluminum alloy to enter the mold directly for casting without being filtered, affecting the casting quality. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a filter cap for aluminum alloy casting. It has a simple structure and is easy to manufacture. The top and bottom edges of the cap body are reinforced, making it less prone to deformation and providing a good filtration effect.

[0006] The solution of this utility model to the aforementioned technical problem is:

[0007] A filter cap for aluminum alloy casting includes a cap body, the cap body including a frustum-shaped cap body portion, an upwardly extending inner cavity formed in the middle of the bottom surface of the cap body portion, the bottom end of the inner cavity being the cap opening, an annular edge formed on the outer wall of the bottom end of the cap body portion extending horizontally outward in a radial direction, an outer conical sleeve portion formed on the outer wall of the annular edge portion extending upwardly and outward, the outer wall of the outer conical sleeve portion cooperating with the inner wall of the upper installation position of the sprue sleeve.

[0008] A horizontal metal plate is pressed against the top surface of the cap body.

[0009] The bottom surface of the horizontal metal plate has a downwardly extending sleeve portion formed in the middle, which is inserted into the middle through hole of the top plate of the cap portion. A radially bent portion is formed on the bottom outer wall of the sleeve portion, and the top surface of the radially bent portion presses against the bottom surface of the top plate of the cap portion.

[0010] The edge of the horizontal metal plate is formed with a downward arc-shaped bend, which matches the arc-shaped chamfer between the edge of the top plate of the cap body and the top of the side plate.

[0011] Reinforcing plates are fixed to the lower part of the outer conical sleeve, the annular edge, and the lower part of the cap.

[0012] The outstanding effect of this utility model is:

[0013] It has a simple structure and is easy to manufacture. Its outer conical sleeve part fits with the inner wall of the upper installation position of the sprue sleeve, making the connection tighter. When the cap part is deformed by pressing, its outer conical sleeve part can also keep in close contact with the inner wall of the upper installation position of the sprue sleeve to achieve filtration and ensure casting quality.

[0014] Meanwhile, the horizontal metal plate at the top of the cap and the reinforcing plate at the bottom of the cap enhance the strength of the cap, making it less prone to deformation and providing good filtration. Attached Figure Description

[0015] Figure 1 This is a partial structural diagram of the present invention installed at the gate sleeve and the runner cone;

[0016] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0017] Figure 3 yes Figure 1 A magnified view of another part;

[0018] Figure 4 This is a partial top view of the present invention. Detailed implementation method:

[0019] For example, see below. Figures 1 to 4 As shown, an aluminum alloy casting filter cap includes a cap body 10, which includes a frustum-shaped cap body portion 11. The bottom surface of the cap body portion 11 has an upwardly extending inner cavity formed in the middle, and the bottom end of the inner cavity is the cap opening 1. The outer wall of the bottom end of the cap body portion 11 has an annular edge portion 12 that extends horizontally outward in a radial direction. The outer wall of the annular edge portion 12 has an outer conical sleeve portion 13 that extends upwardly and outward. The outer wall of the outer conical sleeve portion 13 cooperates with the inner wall of the upper installation position of the sprue sleeve 20.

[0020] A horizontal metal plate 14 is pressed against the top surface of the cap body 11.

[0021] Furthermore, the bottom surface of the horizontal metal plate 14 has a downwardly extending sleeve portion 141 formed in the middle, which is inserted into the middle through hole of the top plate of the cap portion 11. A radially bent portion 142 is formed on the bottom outer wall of the sleeve portion 141, and the top surface of the radially bent portion 142 presses against the bottom surface of the top plate of the cap portion 11.

[0022] The edge of the horizontal metal plate 14 is formed with a downwardly arc-shaped bent portion 143. The bent portion 143 cooperates with the arc-shaped chamfer between the edge of the top plate and the top of the side plate of the cap body 11. That is, the inner wall of the bent portion 143 is closely attached to the outer wall of the corresponding arc-shaped chamfer. The horizontal metal plate 14 increases the strength of the top of the cap body 11, making it less prone to deformation.

[0023] Furthermore, the cap 10 is a stainless steel mesh cap with a mesh size of 24 to 36. This mesh size ensures the normal flow of molten aluminum alloy while also allowing for filtration.

[0024] Furthermore, reinforcing plates 30 are fixed to the lower part of the outer conical sleeve portion 13, the annular edge portion 12, and the lower part of the cap portion 11.

[0025] The reinforcing piece 30 includes an annular piece 31, which is pressed against the top surface of the annular edge 12 and welded and fixed. An inner conical sleeve 32 is formed on the inner side of the annular piece 31. The inner wall of the inner conical sleeve 32 is pressed against and fixed on the outer wall of the lower part of the cap body 11 and cooperates with the outer wall of the lower part of the cap body 11. An outer connecting conical sleeve 33 is formed on the outer side of the annular piece 31, extending upward and outward. The outer wall of the outer connecting conical sleeve 33 is pressed against and fixed on the lower inner wall of the outer conical sleeve 13.

[0026] The reinforcing plate 30 can improve the strength of the annular edge 12, the lower part of the cap body 11 and the lower part of the outer conical sleeve 13, and further improve the deformation resistance of the cap body 10.

[0027] In this embodiment, when in use, it is inserted into the conical stepped through hole in the middle of the sprue sleeve 20. The conical stepped through hole has a small inner diameter at the bottom and a large inner diameter at the top. At the same time, the upper part is a large-diameter conical hole section and the lower part is a small-diameter conical hole section. During installation, the bottom surface of the annular edge 12 presses against the bottom end surface of the edge of the large-diameter conical hole section, and the outer side wall of the outer conical sleeve 13 is tightly attached to the inner side wall of the large-diameter conical hole section. Then, after the upper mold is pressed down, the bottom end of the diverter cone 50 presses against the middle of the top surface of the horizontal metal plate 14 to achieve fixation, and it can be used for casting. Because the outer side wall of the outer conical sleeve 13 is tightly attached to the inner side wall of the large-diameter conical hole section, no matter how the cap body 11 is deformed, its filtering effect will not be affected.

[0028] The reinforcing plate 30 can improve the strength of the annular edge 12, the lower part of the cap body 11 and the lower part of the outer conical sleeve 13, further improving the deformation resistance of the cap body 10, making it less prone to deformation and ensuring better filtration effect.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A filter cap for aluminum alloy casting, comprising a cap body (10), characterized in that: The cap body (10) includes a truncated cone-shaped cap body part (11). The bottom surface of the cap body part (11) is formed with an upwardly extending inner cavity. The bottom end of the inner cavity is the cap opening (1). The outer wall of the bottom end of the cap body part (11) is formed with a radially outwardly extending annular edge (12). The outer wall of the annular edge (12) is formed with an upwardly extending outer conical sleeve part (13). The outer wall of the outer conical sleeve part (13) cooperates with the inner wall of the upper installation position of the sprue sleeve (20). A reinforcing piece (30) is fixed to the lower part of the outer conical sleeve part (13), the annular edge part (12), and the lower part of the cap part (11). The reinforcing piece (30) includes an annular piece (31), which is pressed against the top surface of the annular edge (12) and welded and fixed. An inner conical sleeve (32) is formed on the inner side of the annular piece (31). The inner wall of the inner conical sleeve (32) is pressed against and fixed on the outer wall of the lower part of the cap body (11) and cooperates with the outer wall of the lower part of the cap body (11). An outer connecting conical sleeve (33) extending upward and outward is formed on the outer side of the annular piece (31). The outer wall of the outer connecting conical sleeve (33) is pressed against and fixed on the lower inner wall of the outer conical sleeve (13).

2. The aluminum alloy casting filter cap according to claim 1, characterized in that: A horizontal metal plate (14) is pressed against the top surface of the cap body (11).

3. The aluminum alloy casting filter cap according to claim 2, characterized in that: The bottom surface of the horizontal metal plate (14) is formed with a downwardly extending sleeve part (141), which is inserted into the middle through hole of the top plate of the cap part (11). A radially bent part (142) is formed on the bottom outer wall of the sleeve part (141), and the top surface of the radially bent part (142) presses against the bottom surface of the top plate of the cap part (11).

4. The aluminum alloy casting filter cap according to claim 2, characterized in that: The edge of the horizontal metal plate (14) is formed with a downwardly arc-shaped bend (143), which is matched with the arc-shaped chamfer between the edge of the top plate and the top of the side plate of the cap body (11).

5. A filter cap for aluminum alloy casting according to claim 1, characterized in that: The cap body (10) is a stainless steel mesh cap body with a mesh count of 24 to 36.

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