Aluminum alloy support mold and casting system

Abstract

The utility model relates to the technical field of automobile support production, and discloses an aluminum alloy support mold and a casting system, which comprise a mold body, and the mold body comprises an upper mold, a lower mold, a pouring gate, a cooling insert and a plurality of exhaust holes. The pouring gate is arranged in the middle of the side with the largest wall thickness of the support, the exhaust hole is additionally formed in the side edge of the rib position in the middle of the cavity to facilitate exhaust and elimination of air holes during aluminum liquid filling, meanwhile, the cooling insert is additionally arranged to eliminate shrinkage cavities and hot spots in the support, and the problem that shrinkage cavities and air holes are prone to occurring when overturning casting is used for producing the automobile support is solved.

Description

Technical Field

[0001] This utility model relates to the field of automotive bracket manufacturing technology, and in particular to an aluminum alloy bracket mold and casting system. Background Technology

[0002] Traditional car body brackets are made of high-performance steel plates welded together, which cannot meet the lightweight requirements of new energy high-performance sports cars.

[0003] Previously, some vehicle body brackets were made using aluminum alloy die casting, but mold development costs were high and development cycles were long. Meanwhile, high-performance automotive brackets require tensile strength ≥315MPa and elongation ≥2%, and conventional die castings cannot meet the performance requirements of high-performance sports cars. Using gravity casting with a tilting mechanism can reduce mold costs while still meeting the requirements of high-performance automotive brackets.

[0004] However, the bracket is prone to shrinkage cavities and porosity problems in gravity flipping casting, and there is an urgent need for a mold and casting system that meets the requirements of high-performance automotive brackets. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose an aluminum alloy bracket mold and casting system that has low development cost, short development cycle, and meets the high performance requirements of the bracket.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An aluminum alloy bracket mold includes a mold body, which includes an upper mold, a lower mold, and a sprue. The upper mold and the lower mold are arranged opposite each other along the Y direction. When the upper mold and the lower mold are closed, they form a closed cavity. The cavity is used to fill molten metal and cool to form a bracket.

[0008] The mold body is provided with a sprue, which is located at the connection between the upper mold and the lower mold, and is located in the middle of the inner wall of the cavity where the distance between the two sides is the largest in the direction perpendicular to the Y direction; the sprue is provided at the connection between the upper mold and the lower mold;

[0009] The mold body is also provided with a cooling insert, which is located on the inner wall of the cavity at a distance of more than 10 mm on the left and right sides. The cooling insert is provided with a cooling cavity, which extends along the cavity and is connected to an external cooling pipe.

[0010] The mold body is also provided with a number of vent holes, which are evenly distributed on the inner wall at the corners of the cavity.

[0011] Preferably, there are two inlets, which are located on the same side of the cavity.

[0012] Preferably, the cooling insert includes an upper cooling insert and a lower cooling insert, the upper cooling insert being disposed on the upper mold and the lower cooling insert being disposed on the lower mold.

[0013] Preferably, the cooling insert is detachably mounted on the mold body.

[0014] Preferably, both the mold body and the cooling insert are made of H13 material.

[0015] Preferably, the mold body is provided with ejector pin holes, which are arranged through the mold body along the Y direction.

[0016] Preferably, the mold body is provided with mounting holes for fixing the mold body to an external drive mechanism.

[0017] Preferably, the mold body has a drive hole perpendicular to the Y direction, and the drive hole is used to connect an external drive mechanism.

[0018] Preferably, the gating system is provided with a reinforcing section, the position of which matches the position of a portion of the ejector pin holes.

[0019] An aluminum alloy bracket casting system includes a pouring plate, a connecting block, an upper ejector plate, a lower ejector plate, a plurality of ejector pins, a cooling pipe, a flipping mechanism, a linear drive mechanism, and the aforementioned aluminum alloy bracket mold. One end of each ejector pin is fixed to the upper or lower ejector plate, and the ejector pin passes through the ejector pin hole of the mold body along the Y direction. The end face of the other end of the ejector pin matches the inner wall of the cavity. The pouring plate is connected to the connecting block, and the connecting block is connected to the mold body. The connecting block has a groove that connects the pouring plate and the sprue. The upper ejector plate is connected to the upper mold, and the lower ejector plate is connected to the lower mold. The cooling pipe is connected to the cooling insert and has a sleeve structure. The flipping mechanism drives the pouring plate, connecting block, upper ejector plate, lower ejector plate, ejector pins, and mold body to rotate as a whole in a front-back direction. The linear drive mechanism drives the upper mold and lower mold to move away from or towards each other.

[0020] The technical solution provided by this utility model can include the following beneficial effects:

[0021] The gating system is designed in the middle of the side with the thickest wall of the bracket, which facilitates filling and compensating for shrinkage when the bracket is formed and cooled. It also helps the molten aluminum to fill the central rib area of ​​the cavity. Venting holes are added to the side of the central rib area of ​​the cavity to facilitate venting and eliminate porosity when the molten aluminum is filled. Cooling inserts are added, and water is passed through the cooling inserts to enhance cooling of the central and thicker parts of the bracket, eliminating shrinkage cavities and hot spots inside the bracket. This solves the problem of shrinkage cavities and porosity that easily occur when using inverted casting to produce automotive brackets.

[0022] By employing two gates corresponding to the reinforcing ribs on both sides of the support, the problems of shrinkage cavities and porosity are further eliminated. This solves the problems of shrinkage cavities and porosity easily occurring when using only one gate, and the waste of residual molten aluminum when using more than two gates, while also increasing the cost of subsequent support and runner cutting and separation, as well as subsequent support grinding. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the upper mold according to an embodiment of the present invention.

[0024] Figure 2 This is a three-dimensional structural diagram of a bracket according to an embodiment of the present invention.

[0025] Figure 3 This is a three-dimensional structural diagram of the lower mold according to an embodiment of the present invention.

[0026] Figure 4 This is a three-dimensional structural diagram of the bracket from another direction, representing one embodiment of the present invention.

[0027] Figure 5 This is a three-dimensional structural diagram of the bracket from another direction, representing one embodiment of the present invention.

[0028] Figure 6 This is a three-dimensional structural diagram of a casting system according to an embodiment of the present invention.

[0029] Figure 7 This is a three-dimensional structural diagram of the gating system according to an embodiment of the present invention.

[0030] The components include: mold body 1, sprue 11, cavity 12, cooling insert 13, upper cooling insert 131, lower cooling insert 132, ejector pin hole 14, mounting hole 15, mounting hole 16, upper mold 101, lower mold 102, sprue 103, bracket 2, pouring tray 3, connecting block 4, upper ejector plate 5, lower ejector plate 6, and ejector pin 7. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The embodiments of this utility model are described below with reference to the accompanying drawings.

[0036] An aluminum alloy bracket mold includes a mold body 1, which includes an upper mold 101, a lower mold 102 and a sprue 103. The upper mold 101 and the lower mold 102 are arranged opposite each other along the Y direction. When the upper mold 101 and the lower mold 102 are closed, they form a closed cavity 12. The cavity 12 is used to fill molten metal and cool to form a bracket 2.

[0037] The mold body 1 is provided with a sprue 11, which is located at the connection between the upper mold 101 and the lower mold 102, and the sprue 11 is located in the middle of the inner wall of the cavity 12 where the distance between the two sides perpendicular to the Y direction is the largest; the runner 103 is provided at the connection between the upper mold 101 and the lower mold 102.

[0038] The mold body 1 is also provided with a cooling insert 13. The cooling insert 13 is located on the inner wall of the cavity 12 at a distance of more than 10 mm on the left and right sides. The cooling insert 13 is provided with a cooling cavity, which extends along the cavity and is connected to an external cooling pipe.

[0039] The mold body 1 is also provided with a number of vent holes, which are evenly distributed on the inner wall at the corners of the cavity 12.

[0040] like Figure 2 , Figure 4 and Figure 5 As shown, due to the complex shape of the bracket 2, shrinkage cavities are prone to occur in areas with greater thickness, and the central rib 21 of the bracket 2 is difficult to form and prone to porosity. The gating system 103 is designed in the middle of the side with the greatest wall thickness of the bracket 2, facilitating filling and shrinkage compensation during the cooling and shrinkage process of the bracket 2 during forming. It also facilitates the filling of the central rib 21 position of the cavity 12 by molten aluminum. Venting holes are added to the side of the central rib 21 position of the cavity 12 to facilitate venting and eliminate porosity during aluminum filling. A cooling insert 13 is added, through which water is circulated to enhance cooling of the central and thicker parts of the bracket 2, eliminating internal shrinkage cavities and hot spots, and solving the problems of shrinkage cavities and porosity that easily occur when using inverted casting to produce automotive bracket 2.

[0041] like Figure 1 and Figure 3 As shown, in a specific embodiment, the sprue 11 and the runner 103 are located at the connection between the upper mold 101 and the lower mold 102, which facilitates mold design and processing.

[0042] Preferably, there are two inlets 11, which are spaced apart and located on the same side of the cavity 12.

[0043] In a specific embodiment, by using two gates 11 corresponding to the reinforcing ribs on both sides of the support 2, the problems of shrinkage cavities and porosity are further eliminated. If only one gate is used, shrinkage cavities and porosity are likely to occur. If more than two gates are used, it will result in the waste of residual aluminum liquid at the gate, and at the same time increase the cost of subsequent support and runner cutting and separation, as well as subsequent support grinding.

[0044] Preferably, the cooling insert 13 includes an upper cooling insert 131 and a lower cooling insert 132, the upper cooling insert 131 being disposed on the upper mold 101 and the lower cooling insert 132 being disposed on the lower mold 102.

[0045] In a specific embodiment, the cooling insert 13 is mainly the part that protrudes into the cavity in the mold body 1. The protruding part in the upper mold 101 is the upper cooling insert 131, which is connected to the upper cooling pipe of the upper ejector plate 5. The protruding part in the lower mold 102 is the lower cooling insert 132, which is connected to the lower cooling pipe of the lower ejector plate 6. This facilitates the overall design of the casting system and does not affect the closing and separation of the upper mold 101 and the lower mold 102.

[0046] In one embodiment, two upper cooling inserts 131 and four lower cooling inserts 132 are provided.

[0047] Preferably, the cooling insert 13 is detachably mounted on the mold body 1.

[0048] In a specific embodiment, the mold body 1 is provided with an insert hole that matches the cooling insert 13. After the cooling insert 13 is processed separately, it is inserted into the corresponding insert hole and then fixed by spot welding. Because the cooling insert 13 is detachable, when other parts of the mold are damaged, the cooling insert 13 can be detached and re-welded to the next mold body 1, reducing the mold production cost.

[0049] Preferably, both the mold body 1 and the cooling insert 13 are made of H13 material.

[0050] H13 material has excellent wear resistance and thermal stability. The mold body 1 and the cooling insert 13 are made of the same material, which facilitates welding.

[0051] Preferably, the mold body 1 is provided with an ejector pin hole 14, which is provided through the mold body 14 along the Y direction.

[0052] In a specific embodiment, the casting system is provided with ejector pins 7 for ejecting the formed support 2, and ejector pin holes 14 for ejector pins 7 installed in a non-empty manner.

[0053] Preferably, the mold body 1 is provided with a mounting hole 15, which is used to fix the mold body 1 to an external drive mechanism.

[0054] In a specific embodiment, the mold body 1 is rectangular, and mounting holes 15 are respectively provided at the four corners of the upper mold 101 and the lower mold 102.

[0055] Preferably, the mold body 1 is provided with a drive hole 16 perpendicular to the Y direction, and the drive hole 16 is used to connect an external drive mechanism.

[0056] In a specific embodiment, the drive hole 16 is connected to the end of an external hydraulic rod, which drives the upper mold 101 and the lower mold 102 to move away from or closer to each other along the Y direction.

[0057] Preferably, the gating system 103 is provided with a reinforcing part 1031, the position of which matches the position of part of the ejector pin hole 14.

[0058] like Figure 7 As shown, in a specific embodiment, the sprue 103 is a hollow thin-walled design. The reinforcing part 1031 increases the thickness of the part in contact with the ejector pin 7, so that the sprue 103 can be ejected together with the support 2. Then, the sprue 103 and the support 2 can be separated by cutting.

[0059] An aluminum alloy bracket casting system includes a pouring tray 3, a connecting block 4, an upper ejector plate 5, a lower ejector plate 6, a plurality of ejector pins 7, a cooling pipe, a flipping mechanism, a linear drive mechanism, and the aforementioned aluminum alloy bracket mold. One end of each ejector pin 7 is fixed to either the upper ejector plate 5 or the lower ejector plate 6. The ejector pin 7 passes through the ejector pin hole 14 of the mold body 1 along the Y direction, and the end face of the other end of the ejector pin 7 matches the inner wall of the cavity 12. The pouring tray 3 is connected to the connecting block 4, and the connecting block 4 is connected to the mold body 1. The connecting block 4 is provided with a groove, which connects the pouring plate 3 and the sprue 103; the upper ejector plate 5 is connected to the upper mold 101, and the lower ejector plate 6 is connected to the lower mold 102; the cooling pipe is connected to the cooling insert 13, and the cooling pipe is a sleeve structure; the flipping mechanism is used to drive the pouring plate 3, the connecting block 4, the upper ejector plate 5, the lower ejector plate 6, the ejector pin 7 and the mold body 1 to rotate as a whole in the front-back direction; the linear drive mechanism is used to drive the upper mold 101 and the lower mold 102 to move away from or closer to each other.

[0060] like Figure 6 As shown, in a specific embodiment, the linear drive mechanism drives the upper mold 101 and the lower mold 102 to approach and fit together. Then, the molten aluminum liquid is added to the pouring tray 3. The flipping mechanism's ejector pin 7 plate drives the ejector pin 7 and the mold body 1 therein to rotate forward. The molten aluminum liquid enters the sprue 103 along the groove of the connecting block 4. The molten aluminum liquid is diverted through the sprue 103 and enters the cavity 12 of the mold body 1 from the two inlets 11. At the same time, the water supply is turned on 10 seconds after the molten aluminum liquid enters the sprue 103. The water enters the water-cooling insert through the inner cavity of the cooling pipe sleeve structure to cool the molten aluminum liquid in the cavity 12, and then flows out from the outer cavity of the cooling pipe sleeve structure, so that the molten aluminum liquid cools and solidifies into shape.

[0061] Other configurations and operations according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0062] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An aluminum alloy support mold characterized by: The mold body includes an upper mold, a lower mold, and a sprue. The upper mold and the lower mold are arranged opposite each other along the Y direction. When the upper mold and the lower mold are closed, they form a closed cavity. The cavity is used to fill molten metal and cool to form a support. The mold body is provided with a sprue, which is located at the connection between the upper mold and the lower mold, and is located in the middle of the inner wall of the cavity where the distance between the two sides is the largest in the direction perpendicular to the Y direction; the sprue is provided at the connection between the upper mold and the lower mold; The mold body is also provided with a cooling insert, which is located on the inner wall of the cavity at a distance of more than 10 mm on the left and right sides. The cooling insert is provided with a cooling cavity, which extends along the cavity and is connected to an external cooling pipe. The mold body is also provided with a number of vent holes, which are evenly distributed on the inner wall at the corners of the cavity.

2. An aluminum alloy support mold according to claim 1, characterized by: The mold has two gates, which are located on the same side of the cavity.

3. An aluminum alloy support mold according to claim 1, characterized by: The cooling insert includes an upper cooling insert and a lower cooling insert, the upper cooling insert being disposed on the upper mold and the lower cooling insert being disposed on the lower mold.

4. The aluminum alloy support mold of claim 1, wherein: The cooling insert is detachably mounted on the mold body.

5. An aluminum alloy support mold according to claim 1, characterized by: Both the mold body and the cooling insert are made of H13 material.

6. An aluminum alloy support mold according to claim 1, characterized by: The mold body is provided with ejector pin holes, which are arranged through the mold body along the Y direction.

7. An aluminum alloy stent mold according to claim 1, wherein: The mold body is provided with mounting holes, which are used to fix the mold body to an external drive mechanism.

8. An aluminum alloy support mold according to claim 1, characterized by: The mold body has a drive hole perpendicular to the Y direction, and the drive hole is used to connect an external drive mechanism.

9. An aluminum alloy support mold according to claim 6, characterized by: The gating system is provided with a reinforcing section, the position of which matches the position of a portion of the ejector pin holes.

10. An aluminum alloy bracket casting system characterized by: The mold comprises a pouring tray, a connecting block, an upper ejector plate, a lower ejector plate, a plurality of ejector pins, a cooling pipe, a flipping mechanism, a linear drive mechanism, and an aluminum alloy support mold as described in any one of claims 1-9. One end of each ejector pin is fixed to the upper or lower ejector plate, and the ejector pin passes through the ejector pin hole of the mold body along the Y direction. The end face of the other end of the ejector pin matches the inner wall of the cavity. The pouring tray is connected to the connecting block, and the connecting block is connected to the mold body. The connecting block is provided with a groove, and the groove connects the pouring tray and the sprue. The upper ejector plate is connected to the upper mold, and the lower ejector plate is connected to the lower mold. The cooling pipe is connected to the cooling insert, and the cooling pipe is a sleeve structure. The flipping mechanism is used to drive the pouring tray, the connecting block, the upper ejector plate, the lower ejector plate, the ejector pins, and the mold body to rotate as a whole in the front-back direction. The linear drive mechanism is used to drive the upper mold and the lower mold to move away from or towards each other.

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