Aluminum alloy carrier die-casting mold based on tail gating for electric vehicle

Abstract

The utility model belongs to mould technical field relates to a kind of based on tail part pouring's electric vehicle aluminum alloy carrier frame die casting die.The utility model, including carrier frame die casting lower mould and carrier frame die casting upper mould, mould projection is equipped on the carrier frame die casting lower mould, and the bottom of carrier frame die casting upper mould is equipped with mould concave cavity.The utility model is in the use process, solution filling is uniform, tail part pouring is combined with arc runner and symmetrical shunt structure, so that aluminum alloy melt flows smoothly, avoid impact and eddy current, significantly reduce porosity, shrinkage and other defects.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a die-casting mold for an aluminum alloy cargo rack of an electric vehicle based on tail-end injection. Background Technology

[0002] As a crucial load-bearing component of electric vehicles, the aluminum alloy cargo rack needs to balance lightweight design, high strength, and installation stability. Currently, die-casting molds on the market generally suffer from the following problems: 1. Inappropriate gating method: Existing molds mostly use top or side gating, leading to uneven flow rates of the molten metal during filling, easily generating eddies and air entrapment, resulting in defects such as porosity and shrinkage cavities; 2. Low production efficiency: Most molds are single-cavity designs, producing only one product per die-casting cycle, failing to meet the demands of mass production; 3. Insufficient mold structural stability: The connection structure between the gating channel and the mold body is simple, prone to misalignment during high-pressure die-casting, affecting product dimensional accuracy; 4. Multiple subsequent processing steps: Traditional mold cavities do not fully integrate hole and groove forming structures, requiring additional machining for opening holes and grooves, increasing production costs. Therefore, there is an urgent need to design a die-casting mold for electric vehicle aluminum alloy cargo racks based on tail-mounted gating that can overcome the above defects.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a secondary ejection die-casting mold [application number: 201410824387.2], which includes a template, insert pins, ejector pins, return pins, a front ejector plate, a rear ejector plate, and a base plate. The template includes a first rear template and a second rear template. The insert pins are connected to the second rear template. The ejector pins are connected to the front ejector plate. The return pins are connected to the rear ejector plate. The base plate is located below the rear ejector plate. A limiting spring-loaded device is provided between the rear ejector plate and the front ejector plate. This device includes an upper limit block, a middle limit block, and a lower limit block. The upper limit block is connected to the front ejector plate, the middle limit block is elastically connected to the rear ejector plate, and the lower limit block is connected to the base plate and slidably connected to the upper limit block. When the mold is closed, the upper limit block and the middle limit block engage. When the mold is opened, the upper limit block moves the middle limit block a certain distance, and then the inclined surfaces of the middle and lower limit blocks engage, causing the middle limit block to disengage from the upper limit block. However, this solution still has drawbacks in the die-casting process, including an unreasonable gating method, low production efficiency, insufficient mold structural stability, and numerous subsequent processing steps. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a die-casting mold for an aluminum alloy cargo rack in electric vehicles based on tail-end injection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A die-casting mold for an aluminum alloy cargo rack in an electric vehicle based on tail-end injection includes a lower die-casting mold and an upper die-casting mold. The lower die-casting mold has a mold-closing protrusion, and the upper die-casting mold has a mold-closing cavity at its bottom. The mold-closing protrusion and the mold-closing cavity are positioned and matched in shape. The mold-closing protrusion has two symmetrical lower cargo rack forming parts along the center line of the mold-closing protrusion. The mold-closing cavity has two symmetrical upper cargo rack forming parts along the center line of the mold-closing cavity. The upper and lower cargo rack forming parts are directly opposite each other. A tail-end injection component is provided above the upper die-casting mold, penetrating through the upper die-casting mold and extending to the mold-closing protrusion at its bottom. The bottom of the tail-end injection component is located between the two lower cargo rack forming parts.

[0006] In the aforementioned die-casting mold for an aluminum alloy cargo rack of an electric vehicle based on tail-end injection, the tail-end injection assembly includes an injection main board disposed above the upper die-casting mold of the cargo rack. The injection main board is provided with an injection main cylinder that passes through the upper die-casting mold of the cargo rack. The bottom of the injection main cylinder is provided with a tail-end diversion injection connector.

[0007] In the aforementioned die-casting mold for an aluminum alloy cargo rack for electric vehicles based on tail-end injection, the tail-end diversion injection connector includes an injection connection base disposed at the bottom of the injection main cylinder. The injection connection base has an arc-shaped injection channel, and an injection space is formed between the arc-shaped injection channel and the bottom of the injection main cylinder.

[0008] In the above-mentioned die-casting mold for an aluminum alloy cargo rack of an electric vehicle based on tail-end injection, the middle part of the mold closing protrusion has an injection connection channel, the injection connection channel is connected to the arc-shaped injection flow channel, and the end of the injection connection channel away from the arc-shaped injection flow channel is provided with a flow divider.

[0009] In the aforementioned die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection, the flow divider includes two flow divider channels disposed within the mold closing protrusion. One end of each flow divider channel is connected to the injection connection channel, and the other end is connected to the lower part of the cargo rack forming.

[0010] In the above-mentioned die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection, a fixed anti-deviation sleeve is provided in the upper die-casting mold of the cargo rack, and the fixed anti-deviation sleeve is fitted in the middle of the injection molding main cylinder.

[0011] In the aforementioned die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection, the lower part of the cargo rack forming includes a lower cargo rack forming cavity disposed within a mold closing protrusion, and the lower cargo rack forming cavity has a middle forming protrusion and a side forming protrusion of the cargo rack.

[0012] In the aforementioned die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection, the cargo rack has a central groove forming protrusion inside the central forming protrusion.

[0013] In the aforementioned die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection, the side forming protrusion of the cargo rack is provided with a side slot forming protrusion.

[0014] In the aforementioned die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection, the upper part of the cargo rack forming includes an upper cargo rack forming cavity disposed within the upper die-casting mold, and the upper cargo rack forming cavity and the lower cargo rack forming cavity are positioned opposite each other.

[0015] Compared with existing technologies, the advantages of this utility model are: 1. During use, the solution is filled evenly. The tail-end inlet combined with the arc-shaped flow channel and symmetrical flow distribution structure makes the aluminum alloy melt flow smoothly, avoids impact and eddies, and significantly reduces defects such as porosity and shrinkage.

[0016] 2. This utility model adopts a symmetrical design with two cavities in one mold, which can produce two shelves in one die casting, thus improving production efficiency.

[0017] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a partial structural schematic diagram of the present invention.

[0020] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0021] Figure 4 This is a cross-sectional view of the present invention.

[0022] Figure 5 This is a schematic diagram of the die-casting upper mold of the carrying rack.

[0023] In the diagram: 1. Lower die-casting mold for the shelf; 2. Upper die-casting mold for the shelf; 3. Mold closing protrusion; 4. Mold closing cavity; 5. Lower forming part of the shelf; 6. Upper forming part of the shelf; 7. Tail-end gating assembly; 8. Injection main board; 9. Injection main cylinder; 10. Tail-end diversion gating connector; 11. Gating connection base; 12. Arc-shaped gating channel; 13. Gating connection channel; 14. Diversion section; 15. Diversion channel; 16. Fixed anti-deviation sleeve; 17. Lower forming cavity of the shelf; 18. Middle forming protrusion of the shelf; 19. Side forming protrusion of the shelf; 20. Middle hole groove forming protrusion; 21. Side hole groove forming protrusion; 22. Upper forming cavity of the shelf. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, a die-casting mold for an aluminum alloy cargo rack of an electric vehicle based on tail-end injection includes a lower die-casting mold 1 and an upper die-casting mold 2. The lower die-casting mold 1 is provided with a mold-closing protrusion 3, and the bottom of the upper die-casting mold 2 is provided with a mold-closing cavity 4. The mold-closing protrusion 3 and the mold-closing cavity 4 are positioned and matched in shape. The mold-closing protrusion 3 has two symmetrical lower cargo rack forming parts 5 along the center line of the mold-closing protrusion 3. The mold-closing cavity 4 has two symmetrical upper cargo rack forming parts 6 along the center line of the mold-closing cavity 4. The upper cargo rack forming parts 6 and the lower cargo rack forming parts 5 are arranged opposite each other. A tail-end injection component 7 is provided above the upper die-casting mold 2, passing through the upper die-casting mold 2 and extending to the mold-closing protrusion 3 at the bottom. The bottom of the tail-end injection component 7 is located between the two lower cargo rack forming parts 5.

[0026] In this embodiment, during the die casting process, the upper surface of the lower die 1 of the frame die casting is provided with a mold closing protrusion 3, and the bottom of the upper die 2 of the frame die casting is provided with a mold closing cavity 4. The two are in corresponding positions and have matching shapes to achieve precise mold closing. The mold closing protrusion 3 is provided with two symmetrical lower frame forming parts 5 along the center line, and the mold closing cavity 4 is provided with two corresponding upper frame forming parts 6. After the upper and lower forming cavities are closed, a complete frame cavity is formed. The tail inlet component 7 is set above the upper mold, penetrates the upper mold and extends to the mold closing protrusion 3, and the bottom is located between the two lower frame forming parts 5. The outlet of the tail inlet component 7 is directly opposite the symmetrical center line of the two forming cavities to ensure uniform distribution of melt. The tail inlet position allows the melt to enter the middle first and then flow to both sides, reducing the difference in flow path and improving the uniformity of filling.

[0027] Combination Figure 1-5 As shown, the tail gating assembly 7 includes an injection main plate 8 disposed above the die-casting upper mold 2 of the carrier frame. The injection main plate 8 is provided with an injection main cylinder 9 that passes through the die-casting upper mold 2 of the carrier frame. The bottom of the injection main cylinder 9 is provided with a tail diversion gating connector 10.

[0028] Specifically, the injection main board 8 is fixed above the die-casting upper mold 2 of the carrier frame, and is used to support and fix the injection main cylinder 9. The injection main cylinder 9 passes through the injection main board 8 and the upper mold to form the main conveying channel of the molten liquid. The tail diversion and inlet connection 10 is set at the bottom of the injection main cylinder 9 to realize the turning of the molten liquid flow direction. The injection main cylinder 9 and the tail diversion and inlet connection 10 are connected by flanges or threads to ensure accurate sealing and positioning. The modular design facilitates disassembly and maintenance, while ensuring stable molten liquid flow.

[0029] The tail diversion injection connector 10 includes an injection connection base 11 disposed at the bottom of the injection main cylinder 9. The injection connection base 11 has an arc-shaped injection channel 12, and the arc-shaped injection channel 12 forms an injection space with the bottom of the injection main cylinder 9.

[0030] In this embodiment, the inlet connection base 11 is connected to the bottom of the injection molding main cylinder 9, and has an arc-shaped inlet flow channel 12 inside. The arc-shaped inlet flow channel 12 and the bottom of the injection molding main cylinder 9 form an inlet space, so that the melt changes from vertical downward to horizontal flow to both sides. The inlet of the arc-shaped flow channel 12 is coaxial with the injection molding main cylinder 9, and the outlet is connected to the inlet connection channel 13. The arc design reduces flow resistance, avoids pressure loss and eddies caused by right angle turns, and reduces the risk of air entrapment.

[0031] Combination Figure 2 , Figure 3 As shown, the mold closing protrusion 3 has a sprue connection channel 13 in the middle, which is connected to the arc-shaped sprue runner 12. The end of the sprue connection channel 13 away from the arc-shaped sprue runner 12 is provided with a flow divider 14. The flow divider 14 includes two flow divider channels 15 disposed in the mold closing protrusion 3. One end of the flow divider channel 15 is connected to the sprue connection channel 13, and the other end is connected to the lower part 5 of the carrier frame. In this embodiment, the inlet connection channel 13 is located in the middle of the mold closing protrusion 3, connecting the arc-shaped inlet flow channel 12 and the flow divider 14. The flow divider 14 includes two symmetrical flow divider channels 15, which are respectively connected to the two lower parts 5 of the carrier frame forming. The inlets of the flow divider channels 15 converge at the end of the inlet connection channel 13, and the outlets are respectively connected to the tails of the two forming cavities. The symmetrical flow divider ensures that the two cavities are filled at the same time and at the same speed, avoiding product defects caused by filling differences.

[0032] Combination Figure 2 As shown, the upper die-casting mold 2 of the carrier frame is provided with a fixed anti-deviation sleeve 16, which is sleeved in the middle of the injection molding main cylinder 9.

[0033] In this embodiment, the anti-deviation sleeve 16 is interference-fitted with the upper mold and clearance-fitted with the injection main cylinder 9, which not only fixes the position but also facilitates disassembly and assembly, preventing the injection main cylinder 9 from radially shifting under high pressure, ensuring the stability of the injection channel position, and improving the mold life.

[0034] The lower part 5 of the shelf forming includes a lower shelf forming cavity 17 disposed in the mold closing protrusion 3. The lower shelf forming cavity 17 has a middle shelf forming protrusion 18 and a side shelf forming protrusion 19. The middle shelf forming protrusion 18 is provided with a middle hole groove forming protrusion 20, and the side shelf forming protrusion 19 is provided with a side hole groove forming protrusion 21.

[0035] In this embodiment, the lower cavity 17 of the shelf is provided with a central forming protrusion 18 and a side forming protrusion 19. A central slot forming protrusion 20 is disposed in the central forming protrusion 18, and a side slot forming protrusion 21 is disposed in the side forming protrusion 19. These protrusions and protrusions form the product shape with the upper cavity after the mold is closed, directly forming mounting holes and slots during the die casting process, reducing subsequent machining processes, and improving production efficiency and product accuracy.

[0036] Combination Figure 1-5 As shown, the upper part 6 of the shelf forming includes an upper shelf forming cavity 22 disposed in the upper die-casting mold 2 of the shelf, and the upper shelf forming cavity 22 is disposed opposite to the lower shelf forming cavity 17.

[0037] In this embodiment, the upper cavity 22 and lower cavity 17 of the shelf are positioned opposite each other, forming a complete cavity after the mold is closed.

[0038] The working principle of this utility model is as follows: When the mold is closed, the upper mold 2 and the lower mold 1 are precisely closed by the mold closing protrusion 3 and the mold closing cavity 4. The aluminum alloy melt enters the injection connection base 11 through the injection main cylinder 9. The melt changes its flow direction through the arc-shaped injection flow channel 12 and enters the injection connection channel 13. The melt flows into the two cavities simultaneously through the two flow channels 15 of the flow divider 14. The melt flows between the upper and lower molding cavities, filling the entire cavity and forming the central and side groove structures. The melt cools and solidifies to form two carrier products. The upper mold is raised, the product is taken out, and the next production cycle begins.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0040] Although this article frequently uses terms such as "lower die-casting mold 1," "upper die-casting mold 2," "mold closing protrusion 3," "mold closing cavity 4," "lower forming part of the shelf 5," "upper forming part of the shelf 6," "tail gating assembly 7," "injection main board 8," "injection main cylinder 9," "tail diversion gating connector 10," "gating connection base 11," "arc-shaped gating runner 12," "gating connection channel 13," "diffusion section 14," "diffusion channel 15," "fixed anti-deviation sleeve 16," "lower forming cavity of the shelf 17," "middle forming protrusion of the shelf 18," "side forming protrusion of the shelf 19," "middle slot forming protrusion 20," "side slot forming protrusion 21," and "upper forming cavity of the shelf 22," the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A die-casting mold for an aluminum alloy cargo rack in an electric vehicle based on tail-end injection, comprising a lower die-casting mold (1) and an upper die-casting mold (2), characterized in that, The lower die-casting mold (1) of the shelf is provided with a mold-closing protrusion (3), and the bottom of the upper die-casting mold (2) of the shelf is provided with a mold-closing cavity (4). The mold-closing protrusion (3) and the mold-closing cavity (4) are positioned and matched in shape. The mold-closing protrusion (3) has two lower shelf forming parts (5) symmetrical along the center line of the mold-closing protrusion (3). The mold-closing cavity (4) has two upper shelf forming parts (6) symmetrical along the center line of the mold-closing cavity (4). The upper shelf forming parts (6) and the lower shelf forming parts (5) are arranged opposite each other. The upper die-casting mold (2) of the shelf is provided with a tail gating assembly (7) that passes through the upper die-casting mold (2) of the shelf and extends to the mold-closing protrusion (3) at the bottom. The bottom of the tail gating assembly (7) is located between the two lower shelf forming parts (5).

2. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 1, characterized in that, The tail gating assembly (7) includes an injection main plate (8) disposed above the die-casting upper mold (2) of the carrier frame. The injection main plate (8) has an injection main cylinder (9) that passes through the die-casting upper mold (2) of the carrier frame. The bottom of the injection main cylinder (9) is provided with a tail diversion gating connector (10).

3. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 2, characterized in that, The tail diversion injection connector (10) includes an injection connection base (11) disposed at the bottom of the injection main cylinder (9), the injection connection base (11) has an arc-shaped injection channel (12), and the arc-shaped injection channel (12) and the bottom of the injection main cylinder (9) form an injection space.

4. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 3, characterized in that, The mold closing protrusion (3) has a gating connection channel (13) in the middle, which is connected to the arc-shaped gating channel (12). The gating connection channel (13) has a branch section (14) at the end away from the arc-shaped gating channel (12).

5. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 4, characterized in that, The flow divider (14) includes two flow divider channels (15) disposed in the mold closing protrusion (3). One end of the flow divider channel (15) is connected to the gating connection channel (13), and the other end is connected to the lower part of the frame forming (5).

6. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 2, characterized in that, The upper die-casting mold (2) of the carrier is provided with a fixed anti-deviation sleeve (16), which is fitted in the middle of the injection molding main cylinder (9).

7. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 1, characterized in that, The lower part of the shelf forming (5) includes a lower shelf forming cavity (17) disposed in the mold closing protrusion (3), and the lower shelf forming cavity (17) has a middle shelf forming protrusion (18) and a side shelf forming protrusion (19).

8. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 7, characterized in that, The central forming protrusion (18) of the shelf is provided with a central slot forming protrusion (20).

9. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 8, characterized in that, The side forming protrusion (19) of the shelf is provided with a side slot forming protrusion (21).

10. The die-casting mold for an electric vehicle aluminum alloy cargo rack based on tail-end injection as described in claim 9, characterized in that, The upper part (6) of the shelf forming includes an upper shelf forming cavity (22) disposed in the upper die-casting mold (2) of the shelf, and the upper shelf forming cavity (22) and the lower shelf forming cavity (17) are directly opposite each other.

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