New energy automobile drive motor front cover die-casting die

Abstract

The utility model relates to die casting mould technical field, concretely relates to a new energy automobile drive motor front cover die casting mould, including fixed mould, the side of fixed mould is provided with movable mould, the side away from fixed mould of movable mould is installed with push rod fixed plate, the side close to movable mould of fixed mould is fixedly installed with front mould core, fixedly installed with main runner on fixed mould, and main runner is through with front mould core. Through the slag ladle assembly's double slag ladle runner expands the contact area of slag ladle and metal liquid, can synchronously capture the oxidized slag and various impurities on different filling path, widens exhaust passage simultaneously, can quickly discharge the residual gas in the mould cavity, effectively reduces the casting gas hole, slag hole and other defects, solves the single channel slag ladle of die casting mould because of the limited impurity capture area, exhaust passage is narrow, easy to cause impurity accumulation blockage or gas exhaust not thoroughly, further leads to the technical problem that the casting produces slag hole, gas hole defect.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically to a die-casting mold for the front cover of a new energy vehicle drive motor. Background Technology

[0002] The die-casting mold for the front cover of the drive motor is a tool used to produce the front cover component of the motor. The core function of the die-casting mold is to inject molten metal into the mold cavity and then cool and shape it into the final shape of the front cover of the motor. The front cover of the motor is usually part of the motor housing, which plays a role in protecting the internal components of the motor, preventing dust from entering, and ensuring the shape and stability of the motor. As part of the motor housing, the front cover of the motor usually has complex geometric shapes, grooves, holes and other structures, and the mold can accurately reproduce these details in production.

[0003] Chinese Patent Publication No. CN120734292A discloses a die-casting mold for a motor housing. The mold comprises a moving mold frame, a fixed mold frame, a moving mold core, a fixed mold core, a large circular insert, a left core-pulling mechanism, a right core-pulling mechanism, an upper core-pulling mechanism, and a lower core-pulling mechanism. The large circular insert is recessed inward at its end facing the fixed mold core to form an inner casting cavity. An insert shaft is provided within the inner casting cavity, and a curved protrusion is formed on the end of the insert shaft facing the fixed mold core. The sidewall of the curved protrusion has an arc-shaped curved surface and a positioning cut surface exposed outwards. This invention provides a die-casting mold for motor housings that replaces concealed slots with visible positioning cut surfaces. Workers can directly and clearly observe the position as a positioning reference, significantly shortening the alignment time and operational difficulty before steel sleeve installation, accelerating the assembly speed of the steel sleeve, reducing the time spent in production preparation, and improving overall production efficiency.

[0004] The aforementioned patent proposes that the motor housing mold can accurately reproduce structural details during the production process. After the molten metal is injected through the sprue sleeve, it is guided by the flow divider cone to simultaneously fill the cavities in each area. If the die-casting mold uses a single-channel slag trap for impurity capture, the limited impurity capture area and narrow venting channel of the single-channel slag trap can easily lead to impurity accumulation and blockage or incomplete gas venting, resulting in defects such as slag porosity and gas porosity in the casting. Therefore, we propose a die-casting mold for the front cover of a new energy vehicle drive motor. Utility Model Content

[0005] To address the aforementioned issues, a die-casting mold for the front cover of a new energy vehicle drive motor is provided. The double slag-filling channel of the slag-filling component expands the contact area between the slag-filling and molten metal, simultaneously capturing oxide slag and various impurities along different filling paths. Simultaneously, the venting channel is widened, allowing for rapid discharge of residual gas from the mold cavity. This effectively reduces defects such as porosity and slag holes in the casting, solving the technical problem of single-channel slag-filling molds, which are prone to impurity accumulation and blockage or incomplete gas discharge due to limited impurity capture area and narrow venting channels, leading to slag holes and porosity defects in the casting.

[0006] To address the existing technical problems, this utility model provides a die-casting mold for the front cover of a new energy vehicle drive motor, including a fixed mold, a movable mold on one side of the fixed mold, a push rod fixing plate installed on the side of the movable mold away from the fixed mold, a front mold core fixedly installed on the side of the fixed mold near the movable mold, a main flow channel fixedly installed on the fixed mold, the main flow channel communicating with the front mold core; the front mold core has a first branch channel, the main flow channel communicating with the first branch channel; a rear mold core is fixedly connected to the side of the movable mold near the front mold core; a slag bag assembly for capturing gas and impurities is provided between the front mold core and the rear mold core.

[0007] Preferably, a second flow channel is provided on the rear mold core, and the second flow channel is connected to the first flow channel.

[0008] Preferably, a first core-pulling cylinder is fixedly installed on the side of the moving mold near the rear mold core, and a first core-pulling component is slidably provided on the side of the moving mold near the first core-pulling cylinder, with the output end of the first core-pulling cylinder fixedly connected to the first core-pulling component.

[0009] Preferably, a second core-pulling cylinder is fixedly installed on the side of the moving mold near the first core-pulling cylinder, and a second core-pulling component is slidably arranged on the side of the moving mold near the second core-pulling cylinder, with the output end of the second core-pulling cylinder fixedly connected to the second core-pulling component.

[0010] Preferably, a third core-pulling cylinder is fixedly installed on the side of the moving mold near the second core-pulling cylinder, and a third core-pulling component is slidably arranged on the side of the moving mold near the third core-pulling cylinder, with the output end of the third core-pulling cylinder fixedly connected to the third core-pulling component.

[0011] Preferably, a double slag bag flow channel is provided on one side of the rear mold core, and a secondary flow channel is provided on the side of the rear mold core near the double slag bag flow channel.

[0012] Preferably, a front slag bag plate and a rear slag bag plate are sequentially arranged on the side of the moving mold near the double slag bag flow channel. The front slag bag plate is fixedly connected to the fixed mold, and the rear slag bag plate is fixedly connected to the moving mold.

[0013] The advantages of this utility model compared to the prior art are: 1. The double slag pot flow channel of the slag pot assembly expands the contact area between the slag pot and the molten metal, which can simultaneously capture oxide slag and various impurities on different filling paths. At the same time, it widens the venting channel, which can quickly discharge residual gas in the mold cavity, effectively reducing defects such as porosity and slag porosity in castings. It solves the technical problem that single-channel slag pots in die casting molds are prone to impurity accumulation and blockage or incomplete gas discharge due to limited impurity capture area and narrow venting channels, which in turn leads to slag porosity and porosity defects in castings.

[0014] 2. A guide ramp is set at the inlet of the double slag ladle flow channel to guide the molten metal into the slag ladle smoothly, which solves the technical problems of turbulent air entrapment caused by excessive molten metal flow velocity and high impact pressure at the inlet of the slag ladle flow channel of the die casting mold, as well as insufficient impurity capture caused by unstable flow. Attached Figure Description

[0015] Figure 1 This utility model application presents a three-dimensional schematic diagram of the fixed mold and the moving mold of a die-casting mold for the front cover of a new energy vehicle drive motor.

[0016] Figure 2 This utility model application presents a three-dimensional schematic diagram of the first and second core-pulling cylinders of a die-casting mold for the front cover of a new energy vehicle drive motor.

[0017] Figure 3 This utility model application presents a three-dimensional schematic diagram of the moving mold and push rod fixing plate of a die-casting mold for the front cover of a new energy vehicle drive motor.

[0018] Figure 4 This utility model application presents a three-dimensional schematic diagram of the first core-pulling cylinder and the first core-pulling component of a die-casting mold for the front cover of a new energy vehicle drive motor.

[0019] Figure 5 This utility model application presents a three-dimensional schematic diagram of the first and third core-pulling cylinders of a die-casting mold for the front cover of a new energy vehicle drive motor.

[0020] Figure 6 This utility model application presents a three-dimensional schematic diagram of the main channel and the first branch channel of a die-casting mold for the front cover of a new energy vehicle drive motor.

[0021] Figure 7 yes Figure 5 Enlarged diagram of point A in the middle.

[0022] The diagram is labeled as follows: 1. Fixed mold; 11. Moving mold; 12. Push rod fixing plate; 13. Front mold core; 14. Main runner; 15. First branch runner; 16. Rear mold core; 2. Second branch runner; 21. First core-pulling cylinder; 22. First core-pulling component; 23. Second core-pulling cylinder; 24. Second core-pulling component; 25. Third core-pulling cylinder; 26. Third core-pulling component; 27. Double slag bag runner; 28. Secondary runner; 29. ​​Front slag bag plate; 210. Rear slag bag plate. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0024] See Figures 1-3 As shown, a die-casting mold for the front cover of a new energy vehicle drive motor includes a fixed mold 1, a movable mold 11 on one side of the fixed mold 1, a push rod fixing plate 12 installed on the side of the movable mold 11 away from the fixed mold 1, a front mold core 13 fixedly installed on the side of the fixed mold 1 near the movable mold 11, a main flow channel 14 fixedly installed on the fixed mold 1, the main flow channel 14 communicating with the front mold core 13; the front mold core 13 has a first branch channel 15, the main flow channel 14 communicating with the first branch channel 15; a rear mold core 16 fixedly connected to the side of the movable mold 11 near the front mold core 13; a slag bag assembly for capturing gas and impurities is provided between the front mold core 13 and the rear mold core 16; a second branch channel 2 is opened on the rear mold core 16, the second branch channel 2 communicating with the first branch channel 15; the movable mold 11 near the rear mold core... A first core-pulling cylinder 21 is fixedly installed on one side of the moving mold 11. A first core-pulling component 22 is slidably arranged on the side of the moving mold 11 near the first core-pulling cylinder 21. The output end of the first core-pulling cylinder 21 is fixedly connected to the first core-pulling component 22. A second core-pulling cylinder 23 is fixedly installed on the side of the moving mold 11 near the first core-pulling cylinder 21. A second core-pulling component 24 is slidably arranged on the side of the moving mold 11 near the second core-pulling cylinder 23. The output end of the second core-pulling cylinder 23 is fixedly connected to the second core-pulling component 24. A third core-pulling cylinder 25 is fixedly installed on the side of the moving mold 11 near the second core-pulling cylinder 23. A third core-pulling component 26 is slidably arranged on the side of the moving mold 11 near the third core-pulling cylinder 25. The output end of the third core-pulling cylinder 25 is fixedly connected to the third core-pulling component 26.

[0025] Specifically, the first core-pulling component 22, the second core-pulling component 24, and the third core-pulling component 26 are all arranged radially along the moving mold 11, and their ends extend into the cavity formed by the front mold core 13 and the rear mold core 16, respectively used to form different side holes and groove structures of the motor front cover. Each core-pulling component is provided with a sliding guide structure between itself and the moving mold 11 to ensure the straightness and stability of the core-pulling action; the core-pulling cylinder drives the core-pulling component to move back and forth along the guide direction. When the mold is closed, the core-pulling component extends into the cavity to complete the forming. After the mold is opened, the core-pulling component separates from the casting first to avoid scratching or damaging the casting and to ensure the shape accuracy and surface quality of the motor front cover.

[0026] See Figure 5 and Figure 7 As shown, a double slag bag flow channel 27 is provided on one side of the rear mold core 16, and a secondary flow channel 28 is provided on the side of the rear mold core 16 near the double slag bag flow channel 27; a front slag bag plate 29 and a rear slag bag plate 210 are arranged sequentially on the side of the moving mold 11 near the double slag bag flow channel 27, the front slag bag plate 29 is fixedly connected to the fixed mold 1, and the rear slag bag plate 210 is fixedly connected to the moving mold 11.

[0027] Specifically, the dual slag ladle flow channels 27 are symmetrically arranged on both sides of the rear mold core 16 and are connected to the secondary flow channel 28. The end of the secondary flow channel 28 away from the dual slag ladle flow channels 27 is connected to the second branch flow channel 2, forming a guide path from the main flow channel 14 to the first branch flow channel 15, from the first branch flow channel 15 to the second branch flow channel 2, and then from the second branch flow channel 2 to the secondary flow channel 28. Impurities and gases are captured through the dual slag ladle flow channels 27. The front slag ladle plate 29 and the rear slag ladle plate 210 form a closed chamber corresponding to the position of the dual slag ladle flow channels 27, constituting the main structure of the slag ladle. A guide ramp is provided at the inlet of the dual slag ladle flow channels 27 to guide the molten metal to flow smoothly into the slag ladle, while expanding the capture range of impurities and gases. An exhaust groove is provided at the outlet end of the dual slag ladle flow channels 27 to ensure rapid gas discharge.

[0028] Working principle: During mold closing, the first core-pulling cylinder 21, the second core-pulling cylinder 23, and the third core-pulling cylinder 25 synchronously drive the corresponding core-pulling parts to extend into the cavity. The fixed mold 1 and the moving mold 11 are precisely fitted together, and the front mold core 13 and the rear mold core 16 surround and form a molding cavity that matches the structure of the motor front cover. Molten metal is injected through the main channel 14, and after being diverted through the first branch channel 15 and the second branch channel 2, it fills the cavity along the preset path. At the same time, some of the molten metal carries oxide slag, impurities, and gas, and enters the double slag pack channel 27 through the secondary channel 28, where impurities are captured and gas is discharged by the slag pack chamber. After the casting cools and solidifies, each core-pulling cylinder drives the core-pulling parts to move in the opposite direction and detach from the casting. Then, the fixed mold 1 and the moving mold 11 separate, and the push rod fixing plate 12 drives the push rod to eject the casting, realizing the demolding of the motor front cover blank. Throughout the process, the dual slag hopper 27 effectively improves the efficiency of impurity and gas handling, reduces casting defects, and the core-pulling mechanism precisely shapes complex structures, ensuring product quality and production continuity.

[0029] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A die-casting mold for the front cover of a new energy vehicle drive motor, comprising a fixed mold (1), a movable mold (11) disposed on one side of the fixed mold (1), and a push rod fixing plate (12) installed on the side of the movable mold (11) away from the fixed mold (1), characterized in that, A front mold core (13) is fixedly installed on the side of the fixed mold (1) near the moving mold (11), and a main channel (14) is fixedly installed on the fixed mold (1), which is connected to the front mold core (13). The front mold core (13) has a first branch channel (15), and the main channel (14) is connected to the first branch channel (15); The moving mold (11) is fixedly connected to the rear mold core (16) on the side near the front mold core (13). A slag bag assembly for capturing gas and impurities is provided between the front mold core (13) and the rear mold core (16).

2. The die-casting mold for the front cover of a new energy vehicle drive motor according to claim 1, characterized in that, The rear mold core (16) has a second sub-channel (2) which is connected to the first sub-channel (15).

3. The die-casting mold for the front cover of a new energy vehicle drive motor according to claim 1, characterized in that, A first core-pulling cylinder (21) is fixedly installed on the side of the moving mold (11) near the rear mold core (16), and a first core-pulling component (22) is slidably provided on the side of the moving mold (11) near the first core-pulling cylinder (21). The output end of the first core-pulling cylinder (21) is fixedly connected to the first core-pulling component (22).

4. The die-casting mold for the front cover of a new energy vehicle drive motor according to claim 3, characterized in that, A second core-pulling cylinder (23) is fixedly installed on the side of the moving mold (11) near the first core-pulling cylinder (21), and a second core-pulling component (24) is slidably provided on the side of the moving mold (11) near the second core-pulling cylinder (23). The output end of the second core-pulling cylinder (23) is fixedly connected to the second core-pulling component (24).

5. The die-casting mold for the front cover of a new energy vehicle drive motor according to claim 4, characterized in that, A third core-pulling cylinder (25) is fixedly installed on the side of the moving mold (11) near the second core-pulling cylinder (23). A third core-pulling component (26) is slidably provided on the side of the moving mold (11) near the third core-pulling cylinder (25). The output end of the third core-pulling cylinder (25) is fixedly connected to the third core-pulling component (26).

6. The die-casting mold for the front cover of a new energy vehicle drive motor according to claim 3, characterized in that, A double slag bag flow channel (27) is provided on one side of the rear mold core (16), and a secondary flow channel (28) is provided on the side of the rear mold core (16) near the double slag bag flow channel (27).

7. The die-casting mold for the front cover of a new energy vehicle drive motor according to claim 6, characterized in that, The moving mold (11) is provided with a front slag bag plate (29) and a rear slag bag plate (210) on the side near the double slag bag flow channel (27). The front slag bag plate (29) is fixedly connected to the fixed mold (1), and the rear slag bag plate (210) is fixedly connected to the moving mold (11).

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