Multi-cavity hot extrusion die for automobile aluminum battery tray

Abstract

The multi-cavity hot extrusion die comprises a die body, an extrusion inlet is formed in the surface of one side of the die body, an extrusion outlet is formed in the other side of the die body, the extrusion inlet and the extrusion outlet communicate with each other, and a die core is arranged in the extrusion inlet; the mold core comprises a shunting support and ten mold core blocks, the shunting support divides the extrusion opening into nine shunting holes, the extrusion opening is of a cross-shaped structure and is composed of a transverse groove section, an upper vertical groove section and a lower vertical groove section, five mold core blocks are transversely distributed in the transverse groove section at intervals, and four mold core blocks are distributed in the upper vertical groove section in a matrix array mode; and one is distributed in the lower vertical groove section. Better heat conduction and pressure distribution are provided by the distribution of the shunting bracket and the core block, so that the service life of the mold is prolonged, the convenience of maintenance is improved, the structure of the mold is optimized, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of hot extrusion dies, especially the multi-cavity hot extrusion die for automotive aluminum battery trays. Background Art

[0002] An automotive battery tray is a structural component used in new energy vehicle battery systems. It is usually made of aluminum alloy materials and aims to provide support, fixation, and protection for the battery. Aluminum frames are widely used in the design of battery trays due to their lightweight, good thermal conductivity, and high specific strength. With the rapid development of the new energy vehicle industry, the application of aluminum frames in battery trays is also constantly innovating and developing.

[0003] Currently, for a cross-shaped battery tray aluminum frame produced, due to uneven flow velocity of the aluminum at the connection and insufficient feeding, the formed quality of the extruded profile is poor, the rejection rate is high, and there are also problems such as a relatively large weight of the solid product, insufficient lightweight, and poor structural rigidity. Summary of the Utility Model

[0004] This application provides a multi-cavity hot extrusion die for an automotive aluminum battery tray. As shown in the appendix, the formed aluminum product has a dense chamber structure and has advantages such as good product forming quality, high structural strength, and small weight. Figure 7

[0005] The multi-cavity hot extrusion die for an automotive aluminum battery tray provided by this application adopts the following technical solutions:

[0006] The multi-cavity hot extrusion die for an automotive aluminum battery tray includes a die body. On one side surface of the die body, there is an extrusion inlet, and on the other side, there is an extrusion outlet. The extrusion inlet and the extrusion outlet are interconnected. Inside the extrusion inlet, there is a die core. The die core includes a flow distribution support and core blocks. The flow distribution support is connected to the inner wall of the extrusion inlet, dividing the extrusion inlet into nine flow distribution holes, which are respectively denoted as the upper center hole, the lower center hole, the upper middle hole, the upper left hole, the upper right hole, the lower left hole, the lower middle hole, the lower right hole, and the right side hole. The extrusion outlet is a cross-shaped structure, composed of a horizontal groove section, an upper vertical groove section, and a lower vertical groove section. The upper center hole is directly opposite to the upper vertical groove section. The upper middle hole, the upper left hole, and the upper right hole surround the upper center hole. The lower center hole is directly opposite to the connection of the upper vertical groove section and the horizontal groove section. The lower left hole, the lower middle hole, the lower right hole, and the right side hole surround the lower center hole. Inside the center of the flow distribution support, there are multiple core blocks, and a working gap is formed between adjacent two core blocks. The number of core blocks is ten, among which five are distributed horizontally at intervals in the horizontal groove section, four are distributed in a matrix array in the upper vertical groove section, and one is distributed in the lower vertical groove section.

[0007] Further improvement: the working gap between the upper two core blocks and the lower two core blocks in the upper vertical groove section is inclined, and the included angle with the vertical line is 40 degrees.

[0008] Further improvement: the inner end of the upper central hole is a vertical strip-shaped gate, and the inner end of the lower central hole is a horizontal strip-shaped gate.

[0009] Further improvement: eleven diversion grooves are provided on the inner side of the diversion support. One is provided between the vertical strip-shaped gate and the upper middle hole and the horizontal strip-shaped gate respectively. One is provided between the horizontal strip-shaped gate and the upper left hole and the upper right hole respectively. Three are provided between the horizontal strip-shaped gate and the lower middle hole. One is provided between the upper right hole and the lower right hole. Two are provided between the lower left hole and the lower middle hole. One is provided between the upper left hole and the upper middle hole.

[0010] Further improvement: the upper vertical groove section is located in the middle position of the horizontal groove section, and the lower vertical groove section is located at the right end position of the horizontal groove section.

[0011] Further improvement: a rectangular notch is provided at the right end of the horizontal groove section. The width of the rectangular notch is smaller than the width of the horizontal groove section, and the upper inner wall of the rectangular notch is horizontally aligned with the upper inner wall of the horizontal groove section.

[0012] Further improvement: a sunken plane is provided at the bottom of the extrusion inlet. The inner end of the extrusion outlet communicates with the sunken plane. A blocking step with a raised ring around the inner edge of the extrusion outlet is provided on the sunken plane.

[0013] In summary, the present application includes at least one of the following beneficial technical effects:

[0014] 1. Uniform aluminum flow distribution and improved profile forming quality: The extrusion inlet is divided into nine diversion holes by the diversion support, realizing uniform distribution of the aluminum flow and ensuring the balance of the aluminum flow velocity and the feeding amount in each part. The design of the multi-cavity hot extrusion die helps the uniform filling of the aluminum flow in the cavity, reducing the forming quality problems caused by uneven flow velocity and insufficient feeding.

[0015] 2. Flow channel design adaptable to complex cross-sections: By precisely controlling the aluminum flow at the extrusion inlet and the cavity filling, material waste is reduced and material utilization rate is improved. The cross-shaped structure design of the die extrusion outlet adapts to the complex cross-section requirements of the battery tray aluminum frame, ensuring the geometric accuracy of the product. The die design meets the specific requirements of the automotive battery tray for lightweight, high strength and stability; enhanced structural rigidity: The multi-cavity structure design not only reduces the product weight, but also enhances the overall structural rigidity and stability through a reasonable chamber layout.

[0016] 3. Optimize the die structure and improve production efficiency: The multi-cavity design of the die allows for the simultaneous production of multiple parts of the profile, enhancing production efficiency. The layout of the flow-distributing bracket and the core blocks provides better heat conduction and pressure distribution, contributing to an extended die service life and easier maintenance. Description of the Drawings

[0017] Figure 1 is the front perspective view of the die body.

[0018] Figure 2 is the rear perspective view of the die body.

[0019] Figure 3 is the left half-sectional view of the die body.

[0020] Figure 4 is the right half-sectional view of the die body.

[0021] Figure 5 is the front half-sectional view of the die body.

[0022] Figure 6 is the rear half-sectional view of the die body.

[0023] Figure 7 is the schematic cross-sectional structure diagram of the formed aluminum profile product.

[0024] Description of the Reference Numerals: 10, die body; 20, extrusion inlet; 21, upper central hole; 22, lower central hole; 23, upper intermediate hole; 24, upper left hole; 25, upper right hole; 26, lower left hole; 27, lower intermediate hole; 28, lower right hole; 29, right side hole; 30, extrusion outlet; 31, horizontal groove section; 32, upper vertical groove section; 33, lower vertical groove section; 34, rectangular notch; 35, flow-blocking step; 40, die core; 41, flow-distributing bracket; 42, core block; 43, working gap; 44, vertical strip-shaped gate; 45, horizontal strip-shaped gate; 46, diversion groove. Detailed Description of the Embodiment

[0025] The following further elaborates on this application Figure 1-7 with reference to the attached drawings.

[0026] The embodiment of this application discloses a multi-cavity hot extrusion die for an automotive aluminum battery tray.

[0027] Refer to Figure 1-4, a multi-cavity hot extrusion die for an automotive aluminum battery tray, comprising a die body 10, one side surface of the die body 10 is provided with an extrusion inlet 20, and the other side is provided with an extrusion outlet 30. The extrusion inlet 20 and the extrusion outlet 30 are in communication with each other. Inside the extrusion inlet 20 is provided a die core 40; the die core 40 includes a flow splitting support 41 and core blocks 42. The flow splitting support 41 is connected to the inner wall of the extrusion inlet 20, dividing the extrusion inlet 20 into nine flow splitting holes, respectively denoted as the upper central hole 21, the lower central hole 22, the upper middle hole 23, the upper left hole 24, the upper right hole 25, the lower left hole 26, the lower middle hole 27, the lower right hole 28, and the right side hole 29. The extrusion outlet 30 is a cross-shaped structure, composed of a horizontal groove section 31, an upper vertical groove section 32, and a lower vertical groove section 33. The upper central hole 21 is directly opposite the upper vertical groove section 32. The upper middle hole 23, the upper left hole 24, and the upper right hole 25 surround the upper central hole 21 or the upper vertical groove section 32. The lower central hole 22 is directly opposite the connection between the upper vertical groove section 32 and the horizontal groove section 31. The lower left hole 26, the lower middle hole 27, the lower right hole 28, and the right side hole 29 surround the lower central hole 22 or the connection between the horizontal groove section 31 and the lower vertical groove section 33. Inside the center of the flow splitting support 41 are provided a plurality of core blocks 42, and a working gap 43 is formed between two adjacent core blocks 42. The number of the core blocks 42 is ten, among which five are horizontally spaced and distributed in the horizontal groove section 31, four are matrix-arrayed and distributed in the upper vertical groove section 32, and one is distributed in the lower vertical groove section 33.

[0028] The above technical solution describes a multi-cavity hot extrusion die for producing an automotive aluminum battery tray, and its main designed structure is as follows:

[0029] 1. Die structure: The die body 10 is designed with an extrusion inlet 20 and an extrusion outlet 30, which are in communication with each other to form a channel for the flow of aluminum material. Inside the extrusion inlet 20 is provided a die core 40, and the die core 40 is composed of a flow splitting support 41 and core blocks 42.

[0030] 2. Flow splitting hole design: The flow splitting support 41 divides the extrusion inlet 20 into nine flow splitting holes, namely the upper central hole 21, the lower central hole 22, the upper middle hole 23, the upper left hole 24, the upper right hole 25, the lower left hole 26, the lower middle hole 27, the lower right hole 28, and the right side hole 29. The design of these flow splitting holes helps to evenly distribute the aluminum flow to different parts of the die.

[0031] 3. Cross-shaped extrusion outlet: The extrusion outlet 30 is designed as a cross-shaped structure, composed of a horizontal groove section 31, an upper vertical groove section 32, and a lower vertical groove section 33. This design enables the die to produce a cross-shaped battery tray aluminum frame with a complex cross-section.

[0032] 4. Aluminum Flow Distribution and Core Block Layout: The upper central hole 21 is directly opposite to the upper vertical groove section 32, while the lower central hole 22 is directly opposite to the connection between the upper vertical groove section 32 and the horizontal groove section 31. The upper left hole 24, the upper right hole 25, and the upper middle hole 23 are distributed around the upper central hole 21 or the upper vertical groove section 32, and so on, to ensure the uniform flow of aluminum within the mold. The number of core blocks 42 is ten, which are distributed in different parts of the extrusion outlet 30 to form the working gap 43, further controlling the aluminum flow and forming the chamber structure of the profile.

[0033] With this multi-cavity hot extrusion mold, the problems of uneven flow velocity and insufficient feeding at the connection in traditional production are solved, thereby reducing the problems of poor profile forming quality and high scrap rate. At the same time, due to the adoption of a dense chamber structure, the product weight is reduced, the lightweight effect is improved, and the structural rigidity is maintained. The formed cross-shaped aluminum profile has the following advantages: good forming quality, reducing defects caused by uneven flow and insufficient feeding; high structural strength, benefiting from the dense chamber structure formed by the core blocks 42; small weight, meeting the lightweight requirements of the aluminum battery tray.

[0034] In summary, through the carefully designed die structure and aluminum flow distribution, this technical solution significantly improves the production efficiency and product quality of the aluminum battery tray, while meeting the requirements of lightweight and structural strength.

[0035] A hot extrusion die is a metal forming tool that works at high temperatures and is mainly used to plastically deform metal materials into parts or profiles of the required shape. The following is a brief introduction to the engineering principle and working process of the hot extrusion die: First, the metal material (such as aluminum, steel, etc.) is heated to a certain temperature to make it have sufficient plasticity for plastic deformation. The heated metal blank is loaded into the container of the extruder, usually called the extrusion cylinder. The extruder applies extremely high pressure to the blank through hydraulic or mechanical means, forcing the metal to flow out of the extrusion cylinder. The extrusion die is installed at the outlet of the extruder, and the shape of the die corresponds to the cross-section of the part to be formed. Under the action of high pressure, the metal blank passes through the cavity of the die and undergoes plastic deformation according to the shape of the die. The die is internally designed with specific dimensions and shapes to ensure that the extruded metal parts or profiles have precise dimensions and surface finish. The extruded metal parts are quickly cooled and solidified after leaving the die to form the final product.

[0036] As shown in the appendix Figure 2 and the appendix Figure 7As shown, the working gap 43 between the upper two core blocks 42 and the lower two core blocks 42 in the upper vertical groove section 32 is inclined, and the angle with the vertical line is 40 degrees. The inclined working gap 43 enables the mold to form profiles with inclined rib plates. Such inclined plates are used for structural components with specific angles in the battery tray, which can enhance the structural performance of the battery tray and provide better mechanical support.

[0037] As shown in the Figure 1 attachment, the inner end of the upper central hole 21 is a vertical strip-shaped gate 44, which helps the molten aluminum flow vertically inside the mold and fill the upper area of the profile. The inner end of the lower central hole 22 is a horizontal strip-shaped gate 45, which helps the molten aluminum flow horizontally inside the mold and fill the lower area of the profile. The design of the vertical and horizontal strip-shaped gates helps to improve the filling efficiency of the molten aluminum, reduce the filling time, and improve the production efficiency. By optimizing the shape and position of the gate, the formation of air holes in the profile can be reduced, the density and mechanical properties of the product can be improved, which helps to improve the forming quality of the profile and reduce the scrap rate of the product. This gate design enables the mold to adapt to the production of battery tray aluminum frames with complex cross-sectional features.

[0038] As shown in the Figure 5 attachment, eleven diversion channels 46 are provided on the inner side of the diversion bracket 41. One is provided between the vertical strip-shaped gate 44 and the upper middle hole 23, and one is provided between the vertical strip-shaped gate 44 and the horizontal strip-shaped gate 45. One is provided between the horizontal strip-shaped gate 45 and the upper left hole 24, and one is provided between the horizontal strip-shaped gate 45 and the upper right hole 25. Three are provided between the horizontal strip-shaped gate 45 and the lower middle hole 27. One is provided between the upper right hole 25 and the lower right hole 28. Two are provided between the lower left hole 26 and the lower middle hole 27. One is provided between the upper left hole 24 and the upper middle hole 23.

[0039] Through the above technical solution design, a total of eleven diversion channels 46 are provided on the inner side of the diversion bracket 41. These diversion channels are distributed between the vertical strip-shaped gate 44, the horizontal strip-shaped gate 45 and each diversion hole, ensuring that the molten aluminum can flow smoothly to each part of the mold. The molten aluminum fills the cavity of the mold evenly, reducing the non-uniformity of the molten aluminum during the filling process and improving the forming quality of the profile. The design of the diversion channels 46 helps to improve the filling efficiency of the molten aluminum, shorten the filling time, and enhance the production efficiency. The precise setting of the diversion channels 46 enables the mold to adapt to the production of battery tray aluminum frames with complex cross-sectional features.

[0040] As shown in the Figure 2As shown, the upper vertical groove section 32 is located at the middle position of the horizontal groove section 31, and the lower vertical groove section 33 is located at the right end position of the horizontal groove section 31. This specific groove section layout helps to form a battery tray aluminum frame with a cross-shaped structure, where the combined parts of the upper and lower vertical groove sections and the horizontal groove section form cross intersection points. Through this layout of the upper and lower vertical groove sections, the formed cross-shaped aluminum profile has better structural integrity and mechanical properties, while maintaining the characteristics of light weight and high strength.

[0041] A rectangular notch 34 is provided at the right end of the horizontal groove section 31. The width of the rectangular notch 34 is smaller than the width of the horizontal groove section 31, and the upper inner wall of the rectangular notch 34 is horizontally aligned with the upper inner wall of the horizontal groove section 31. The rectangular notch 34 helps to improve the forming quality of the profile, especially in the connection area between the horizontal groove section 31 and the lower vertical groove section 33, reducing forming defects.

[0042] As shown in the appendix Figure 5-6 As shown, a sunken plane is provided at the bottom of the extrusion inlet 20. The inner end of the extrusion outlet 30 communicates with the sunken plane. A flow blocking step 35 is provided on the sunken plane around the inner end edge of the extrusion outlet 30. The sunken plane provides a stable base surface, which helps the aluminum liquid to be evenly distributed before entering the extrusion outlet 30. The flow blocking step 35 can serve as an obstacle to control the flow rate of the aluminum liquid into the extrusion outlet 30, preventing the aluminum liquid from flowing in too fast and causing uneven filling. Through the design of the sunken plane and the flow blocking step 35, the formed cross-shaped aluminum profile has better structural integrity and surface quality.

[0043] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. Multi-cavity hot extrusion die for automotive aluminum battery tray, comprising a die body (10), one side surface of the die body (10) is provided with an extrusion inlet (20), the other side is provided with an extrusion outlet (30), the extrusion inlet (20) and the extrusion outlet (30) are in communication with each other, and a die core (40) is arranged inside the extrusion inlet (20); characterized in that: The mold core (40) includes a flow splitting support (41) and core blocks (42). The flow splitting support (41) is connected to the inner wall of the extrusion inlet (20), dividing the extrusion inlet (20) into nine flow splitting holes, respectively denoted as the upper central hole (21), the lower central hole (22), the upper middle hole (23), the upper left hole (24), the upper right hole (25), the lower left hole (26), the lower middle hole (27), the lower right hole (28), and the right side hole (29). The extrusion outlet (30) is a cross-shaped structure, composed of a horizontal groove section (31), an upper vertical groove section (32), and a lower vertical groove section (33). The upper central hole (21) faces the upper vertical groove section (32). The upper middle hole (23), the upper left hole (24), and the upper right hole (25) surround the upper central hole (21). The lower central hole (22) faces the connection of the upper vertical groove section (32) and the horizontal groove section (31). The lower left hole (26), the lower middle hole (27), the lower right hole (28), and the right side hole (29) surround the lower central hole (22). A plurality of core blocks (42) are arranged inside the center of the flow splitting support (41), and a working gap (43) is formed between adjacent two core blocks (42). The number of the core blocks (42) is ten, among which five are horizontally spaced and distributed in the horizontal groove section (31), four are matrix-arrayed and distributed in the upper vertical groove section (32), and one is distributed in the lower vertical groove section (33).

2. The multi-cavity hot extrusion die for an automotive aluminum battery tray according to claim 1, wherein: The working gaps (43) between the upper two core blocks (42) and the lower two core blocks (42) in the upper vertical groove section (32) are inclined, and the included angle with the vertical line is 40 degrees.

3. The multi-cavity hot extrusion die for the automotive aluminum battery tray according to claim 2, wherein: The inner end of the upper central hole (21) is a vertical strip-shaped gate (44), and the inner end of the lower central hole (22) is a horizontal strip-shaped gate (45).

4. The multi-cavity hot extrusion die for an automotive aluminum battery tray according to any one of claims 1-3, characterized in that: Eleven diversion channels (46) are provided inside the flow splitting support (41), one is provided between the vertical strip-shaped gate (44) and the upper middle hole (23), one is provided between the vertical strip-shaped gate (44) and the horizontal strip-shaped gate (45), one is provided between the horizontal strip-shaped gate (45) and the upper left hole (24), one is provided between the horizontal strip-shaped gate (45) and the upper right hole (25), three are provided between the horizontal strip-shaped gate (45) and the lower middle hole (27), one is provided between the upper right hole (25) and the lower right hole (28), two are provided between the lower left hole (26) and the lower middle hole (27), and one is provided between the upper left hole (24) and the upper middle hole (23).

5. The multi-cavity hot extrusion die for the aluminum battery tray of an automobile according to claim 1, wherein: The upper vertical groove section (32) is located at the middle position of the horizontal groove section (31), and the lower vertical groove section (33) is located at the right end position of the horizontal groove section (31).

6. The multi-cavity hot extrusion die for an automotive aluminum battery tray according to claim 5, characterized in that: A rectangular notch (34) is provided at the right end of the horizontal groove section (31). The width of the rectangular notch (34) is smaller than the width of the horizontal groove section (31), and the upper inner wall of the rectangular notch (34) is horizontally aligned with the upper inner wall of the horizontal groove section (31).

7. The multi-cavity hot extrusion die for an automotive aluminum battery tray according to claim 1, characterized in that: A sunken plane is provided at the bottom of the extrusion inlet (20). The inner end of the extrusion outlet (30) communicates with the sunken plane. A flow blocking step (35) surrounding the inner end edge of the extrusion outlet (30) is provided on the sunken plane.

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