A thin surface ring structure for an aluminum subframe

Abstract

The utility model relates to a thin surface annular riser structure for aluminium auxiliary frame, including upper die structure, lower die structure and forming cavity, the upper die structure and lower die structure combination form forming cavity, the lower die structure on be provided with thin surface forming end face, the middle part of thin surface forming end face be provided with a circle downward concave annular groove, the middle part of annular groove form riser boss, the middle part of riser boss be provided with the protruding column of vertical upward extension, the lower end face of upper die structure be provided with and thin surface forming end face correspond with the upper die forming end face, the upper die forming end face be provided with and riser boss correspond with riser cavity. The utility model has improved annular position molten aluminium feeding ability, guarantees the sequential solidification of casting, to promote the internal quality of casting etc.

Description

Technical Field

[0001] This utility model relates to the field of riser structure technology, and in particular to an annular riser structure for thin sections of aluminum subframes. Background Technology

[0002] Low-pressure casting is a casting method in which liquid alloy is pressed into the mold cavity from bottom to top under pressure and solidified under pressure to obtain a casting. During the casting production process, insufficient feeding (such as lugs) is likely to occur at certain annular thin-walled positions of the casting, resulting in shrinkage porosity defects. In order to solve the above problems, it is necessary to modify the annular thin-walled positions. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an annular riser structure for thin sections of aluminum subframes, which has the characteristics of improving the feeding capacity of molten aluminum at the annular position, ensuring the sequential solidification of castings, and thus improving the internal quality of castings.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a thin-surface annular riser structure for aluminum subframes is provided, including an upper mold structure, a lower mold structure and a forming cavity. The upper mold structure and the lower mold structure are combined to form the forming cavity. The lower mold structure is provided with a thin-surface forming end face. A downwardly concave annular groove is provided in the middle of the thin-surface forming end face. A riser boss is formed in the middle of the annular groove. A vertically upwardly extending protruding post is provided in the middle of the riser boss. The lower end face of the upper mold structure is provided with an upper mold forming end face corresponding to the thin-surface forming end face. A riser cavity body corresponding to the riser boss is provided on the upper mold forming end face.

[0005] In this technical solution, an annular groove is set to ensure that the annular thin wall on the product can be formed. At the same time, a riser cavity is set to collect more molten metal, thereby ensuring that the annular groove can be fully filled. Meanwhile, a protruding column is set to reduce the volume of the riser cavity, thereby ensuring that the amount of molten metal is reduced.

[0006] As a supplement to this technical solution, the upper edge of the sidewall of the annular groove is provided with a rounded corner structure. The rounded corner structure facilitates product demolding and improves product quality.

[0007] As a supplement to this technical solution, the upper end of the protruding column has a ball-shaped structure with a horizontal cross-section in the middle. The ball-shaped structure with a horizontal cross-section facilitates the removal of the product.

[0008] As a supplement to this technical solution, the edge of the ejector cavity is rounded for transition, and an ejector pin hole is provided at the bottom center of the ejector cavity to ensure rapid demolding of the product.

[0009] As a supplement to this technical solution, four notches are evenly provided at the edge of the mouthpiece, and the bottom surface of the notches adopts a gradually descending stepped double-step structure.

[0010] Beneficial effects: This utility model relates to an annular riser structure for thin sections of aluminum subframes. By setting an annular groove, it ensures that the annular thin wall on the product can be formed. At the same time, by setting a riser cavity, it is used to hold more molten metal, thereby ensuring that the annular groove can be fully filled. Furthermore, by setting a protruding column, it reduces the volume of the riser cavity, thereby reducing the amount of molten metal. It has the characteristics of improving the aluminum molten metal feeding capacity at the annular position, ensuring the sequential solidification of the casting, and thus improving the internal quality of the casting. Attached Figure Description

[0011] Figure 1 This is a full sectional view of the present invention; Figure 2 This is a structural view of the lower mold structure described in this utility model; Figure 3 This is a structural view of the upper mold structure described in this utility model.

[0012] Illustration: 1. Upper mold structure, 2. Lower mold structure, 3. Molding cavity, 4. Thin-surface molding end face, 5. Upper mold molding end face, 6. Annular groove, 7. Riser boss, 8. Protruding pillar, 9. Riser cavity body, 10. Ejector pin hole, 11. Notch. Detailed Implementation

[0013] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0014] The embodiments of this utility model relate to an annular riser structure for thin sections of aluminum subframes, such as... Figures 1-3 As shown, the device includes an upper mold structure 1, a lower mold structure 2, and a molding cavity 3. The upper mold structure 1 and the lower mold structure 2 are combined to form the molding cavity 3. The lower mold structure 2 is provided with a thin-surface molding end face 4. The thin-surface molding end face 4 has a downwardly concave annular groove 6 in the middle. The annular groove 6 forms a riser boss 7 in the middle. The riser boss 7 has a vertically upwardly extending protruding column 8 in the middle. The lower end face of the upper mold structure 1 is provided with an upper mold molding end face 5 corresponding to the thin-surface molding end face 4. The upper mold molding end face 5 is provided with a riser cavity body 9 corresponding to the riser boss 7.

[0015] In this technical solution, an annular groove 6 is provided to ensure that the annular thin wall on the product can be formed. At the same time, a riser cavity 9 is provided to collect more molten metal, thereby ensuring that the annular groove 6 can be fully filled. Meanwhile, a protruding column 8 is provided to reduce the volume of the riser cavity 9, thereby ensuring that the amount of molten metal is reduced.

[0016] As a supplement to this technical solution, the upper edge of the side wall of the annular groove 6 is provided with a rounded corner structure. The rounded corner structure facilitates product demolding and improves product quality.

[0017] As a supplement to this technical solution, the upper end of the protruding column 8 is a ball-head structure with a horizontal cross-section in the middle. The ball-head structure with a horizontal cross-section facilitates the removal of the product.

[0018] As a supplement to this technical solution, the edge of the ejector cavity 9 is rounded for transition, and an ejector pin hole 10 is provided at the bottom center of the ejector cavity 9 to ensure rapid demolding of the product.

[0019] As a supplement to this technical solution, four notches 11 are evenly provided at the edge of the riser body 9. The bottom surface of the notches 11 adopts a gradually descending stepped double-step structure. By setting four notches 11, when the fluidity of the molten metal in the lower part deteriorates, the molten metal in the riser body 9 can be returned through the four smaller notches for replenishment, ensuring the integrity of the product.

[0020] Example When the molten metal is being filled, it first fills the annular groove 6. After the annular groove 6 is filled, it fills the upper cavity above the riser boss 7. When the molten metal surface is flush with the upper mold forming end face 5, it indicates that the lower molten metal filling is complete. Then, the molten metal is filled again, so that it begins to fill the riser cavity 9. After all the filling is completed, it is cooled and formed. After completion, the mold is opened and the part is removed.

[0021] Since there is a certain amount of molten metal in the riser cavity 9, when the annular groove 6 begins to cool, this part will shrink. Due to the shrinkage, the molten metal in the riser cavity 9 will flow to the position that needs to be replenished, thus ensuring product quality.

Claims

1. A thin face annular riser structure for an aluminum subframe characterized by: The system includes an upper mold structure (1), a lower mold structure (2), and a molding cavity (3). The upper mold structure (1) and the lower mold structure (2) are combined to form the molding cavity (3). The lower mold structure (2) is provided with a thin-surface molding end face (4). The middle part of the thin-surface molding end face (4) is provided with a downward-facing concave annular groove (6). The middle part of the annular groove (6) forms a riser boss (7). The middle part of the riser boss (7) is provided with a vertically upward-extending protruding column (8). The lower end face of the upper mold structure (1) is provided with an upper mold molding end face (5) corresponding to the thin-surface molding end face (4). The upper mold molding end face (5) is provided with a riser cavity body (9) corresponding to the riser boss (7).

2. A thin face annular riser structure for an aluminum sub-frame as defined in claim 1, wherein: The annular groove (6) has rounded corners at the upper edge of its sidewall.

3. A thin face annular riser structure for an aluminum sub-frame as defined in claim 1, wherein: The upper end of the protruding column (8) has a spherical head structure with a horizontal cross-section in the middle.

4. A thin face annular riser structure for an aluminum sub-frame as defined in claim 1, wherein: The edge of the oral cavity (9) is rounded for transition, and a pin hole (10) is provided at the bottom center of the oral cavity (9).

5. A thin face annular riser structure for an aluminum sub-frame as defined in claim 1 wherein: The edge of the oral cavity (9) is provided with four notches (11) evenly distributed, and the bottom surface of the notches (11) adopts a gradually descending stepped double-step structure.

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