A type of motor housing die casting mold

Abstract

This utility model discloses a die-casting mold for motor housings, including a moving mold mechanism, a side mold mechanism, a fixed mold mechanism, and an overflow system. The moving mold mechanism includes a moving mold base plate with side grooves, a moving mold bottom plate, and a moving mold insert; the side mold mechanism has side modules that can slide along the side grooves and side cylinders that drive their movement; the fixed mold mechanism includes a fixed mold base plate, a fixed mold bottom plate, and a fixed mold insert that cooperate with the moving mold. The fixed mold base plate has a surrounding flow channel and multiple branch channels and a feed inlet connected to it; the overflow system includes an upper slag discharge channel on the fixed mold base plate and multiple circumferentially distributed lower slag discharge channels on the moving mold bottom plate. This utility model, through its surrounding flow channel layout and multi-directional coordinated venting and slag discharge system, achieves stable metal filling and efficient venting, significantly reducing defects such as porosity in castings, improving product density and surface quality, and is particularly suitable for high-quality die-casting production of motor housings for new energy vehicles.

Description

Technical Field

[0001] This utility model relates to the field of die casting molds, and in particular to a die casting mold for motor housings. Background Technology

[0002] Currently, the drive motor housing of new energy vehicles, as a key component, has an increasingly complex structure and extremely high requirements for lightweighting, heat dissipation performance, and dimensional accuracy, and is generally formed by high-pressure die casting. However, due to its characteristics such as deep cavity, thin wall, and complex external heat dissipation fins, traditional die casting molds cannot effectively capture and expel gas and cold material at the end of the cavity during high-speed filling, which easily leads to defects such as porosity, shrinkage cavities, and incomplete filling in the casting, seriously affecting the mechanical strength and airtightness of the product, and failing to meet the stringent requirements of high reliability and consistency for new energy vehicle motors. In addition, the existing mold's runner and venting system design is not adaptable to complex structures, limiting the improvement of production efficiency and yield. Therefore, there is an urgent need to develop a dedicated die casting mold solution that can achieve uniform filling, efficient venting, and ensure casting quality. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a die-casting mold for motor housings, which enables molten metal to fill the cavity smoothly and evenly, significantly reducing turbulence and air entrapment, achieving uniform filling, efficient venting, and ensuring casting quality.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A die-casting mold for an electric motor housing, comprising The moving mold mechanism includes a moving mold base plate, a moving mold bottom plate mounted on the moving mold base plate, and a moving mold insert disposed on the moving mold bottom plate; The side mold mechanism is respectively arranged around the moving mold base plate, including side modules and side cylinders that drive the side modules to move; The fixed mold mechanism includes a fixed mold base plate that mates with the moving mold base plate, a fixed mold base plate that mates with the moving mold base plate, and a fixed mold insert that mates with the moving mold insert on the fixed mold base plate. The fixed mold base plate, the moving mold base plate, and the side module form the outer wall surface of the workpiece cavity. The moving mold insert and the fixed mold insert form the inner wall surface of the cavity. The fixed mold base plate has surrounding flow channels on both sides of the cavity. The surrounding flow channels have multiple branch flow channels that communicate with the cavity. The fixed mold base plate has a material inlet that communicates with the surrounding flow channels. The overflow system includes an upper slag discharge trough disposed on the side of the fixed mold base plate away from the inlet and communicating with the cavity, and a lower slag discharge trough disposed on the moving mold base plate and communicating with the cavity. The upper slag discharge trough has two sections respectively disposed beside the two surrounding flow channels, and the lower slag discharge trough has multiple sections circumferentially disposed around the outer periphery of the cavity.

[0005] According to an embodiment of this utility model, a die-casting mold for motor housings has at least the following beneficial effects: The utility model, through its surrounding flow channel and multi-branch flow channel design, enables molten metal to fill the cavity smoothly and evenly, significantly reducing turbulence and air entrapment, and improving the filling effect. The side mold mechanism distributed around the perimeter and driven by cylinders allows for flexible forming of the mold's lateral core pulling and complex shapes, expanding the mold's process adaptability. In particular, the multiple sets of upper and lower slag discharge channels set on the fixed and moving molds, closely arranged around the outer perimeter of the cavity, together form a highly efficient and reliable overflow and venting system. This system can promptly capture and discharge gas and cold material at the end of the cavity, significantly reducing casting defects such as porosity and cold shuts, thereby improving the density, surface quality, and mechanical properties of the die-cast parts. It is highly suitable for the production of high-quality die-cast parts such as motor housings for new energy vehicles.

[0006] According to some embodiments of the present invention, the end of the upper slag discharge trough is provided with a slag bag opening.

[0007] The advantage is that the slag outlet can effectively collect and contain cold slag metal and oxides from the upper slag discharge channel, preventing them from flowing back and contaminating the mold cavity, and further improving the surface quality of the casting.

[0008] According to some embodiments of the present invention, the end of the lower slag discharge trough is provided with a slag discharge port.

[0009] The advantage is that the lower slag bag opening is used to collect the waste material discharged from the bottom of the cavity. Working together with the upper slag bag opening, it can collect waste material from all directions in the cavity and optimize the slag discharge effect.

[0010] According to some embodiments of this utility model, the slag discharge port is connected to an exhaust groove.

[0011] The advantage is that the venting channel smoothly discharges the gas inside the slag bag opening to the outside of the mold, enhancing the venting capacity of the entire system, which is especially beneficial for the release of gas in the deep cavity and reduces internal porosity.

[0012] According to some embodiments of this utility model, the inlet is provided with a sprue sleeve, and the moving mold base plate is provided with a flow divider cone that cooperates with the sprue sleeve.

[0013] The benefits are that the combined use of the sprue bushing and the flow divider cone ensures the concentration and directionality of the molten metal injection, allowing the material flow to transition smoothly, reducing the impact on the cavity, and improving the filling shape.

[0014] According to some embodiments of the present invention, an ejection mechanism is also included, which is disposed on the side of the moving mold mechanism opposite to the fixed mold mechanism.

[0015] The advantage is that the ejection mechanism can automatically eject the molded part after the mold opens, which improves the degree of automation and efficiency of production, while avoiding damage to the product that may be caused by manual handling.

[0016] According to some embodiments of the present invention, a cooling mechanism is also included, which includes cooling pipes disposed within the moving mold insert, the side module, the fixed mold base plate, and the fixed mold insert.

[0017] The advantages are: the cooling mechanism introduces cooling medium, which can uniformly cool the key parts of the mold, effectively control the solidification process, shorten the molding cycle, and reduce thermal stress and deformation caused by excessive temperature difference.

[0018] According to some embodiments of the present invention, a guiding mechanism is also included, the guiding mechanism comprising a guide post disposed on the fixed mold base plate and a guide sleeve disposed on the moving mold base plate and cooperating with the guide post.

[0019] The benefits are that the guiding mechanism ensures precise alignment of the moving mold and the fixed mold during the mold closing process, improves the mold closing accuracy, guarantees the stability of product dimensions, and protects the mold cavity from misalignment damage.

[0020] According to some embodiments of the present invention, the side of the moving mold base plate is provided with a fixing bracket for fixing the side cylinder.

[0021] The advantages are: the mounting bracket provides a stable and reliable installation base for the side cylinder, ensuring the smoothness and accuracy of the lateral core-pulling movement and extending the service life of the cylinder.

[0022] According to some embodiments of the present invention, the sides of the moving mold insert and the fixed mold insert have an inclination.

[0023] The advantage is that the angled design of the insert side forms a draft angle, which reduces the resistance when the die casting is ejected, makes demolding smoother, and effectively prevents the product surface from being scratched during the ejection process.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 for Figure 1 Schematic diagram of the moving mold mechanism; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 1 Schematic diagram of the central mold mechanism; Figure 5 for Figure 4 Enlarged diagram of point B in the middle.

[0027] Reference numerals: Moving mold base plate 100, moving mold bottom plate 110, moving mold insert 120, side module 130, side cylinder 140, fixed mold base plate 150, fixed mold bottom plate 160, fixed mold insert 170, surrounding runner 180, branch runner 190, inlet 200, upper slag discharge trough 210, lower slag discharge trough 220, upper slag bag opening 230, lower slag bag opening 240, venting groove 250, sprue sleeve 260, runner cone 270, ejection mechanism 280, guide pillar 290, guide sleeve 300, fixing frame 310. Detailed Implementation

[0028] 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.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between 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.

[0032] The following is for reference. Figures 1-5 A die-casting mold for an electric motor housing is described in detail with reference to a specific embodiment. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0033] like Figures 1-5 As shown, the motor housing die-casting mold mainly consists of a moving mold mechanism, a side mold mechanism, a fixed mold mechanism, and an overflow system. The moving mold mechanism includes a moving mold base plate 100, a moving mold bottom plate 110 mounted on the moving mold base plate 100, and a moving mold insert 120 mounted on the moving mold bottom plate 110. The fixed mold mechanism includes a fixed mold base plate 150 that mates with the moving mold base plate 100, a fixed mold bottom plate 160 mounted on the fixed mold base plate 150 that mates with the moving mold bottom plate 110, and a fixed mold insert 170 mounted on the fixed mold bottom plate 160 that mates with the moving mold insert 120. The fixed mold base plate 150 has side grooves leading to its center on all four sides. The side mold mechanisms are respectively arranged around the moving mold base plate 100, including side modules 130 slidably disposed within the side grooves (not shown in the figure) and side cylinders 140 that drive the side modules 130 to move along the side grooves. The fixed mold base plate 160, the moving mold base plate 110, and the side module 130 form the outer wall surface of the workpiece cavity, while the moving mold insert 120 and the fixed mold insert 170 form the inner wall surface of the cavity. The fixed mold base plate 150 has surrounding flow channels 180 on both sides of the cavity, and multiple branch flow channels 190 connecting the cavity are provided on the surrounding flow channels 180. The fixed mold base plate 150 also has a feed port 200 that communicates with the surrounding flow channels 180.

[0034] like Figure 3 and Figure 5As shown, the overflow system includes an upper slag discharge trough 210 disposed on the side of the fixed mold base plate 150 away from the inlet 200 and communicating with the cavity, and a lower slag discharge trough 220 disposed on the moving mold base plate 110 and communicating with the cavity. There are two upper slag discharge troughs 210, respectively disposed beside two surrounding flow channels 180, and multiple lower slag discharge troughs 220, circumferentially disposed around the outer periphery of the cavity. In a preferred embodiment, the upper slag discharge trough 210 has an upper slag trap opening 230 at its end, which can effectively collect and contain cold, dirty metal and oxides from the upper slag discharge trough 210; the lower slag discharge trough 220 has a lower slag trap opening 240 at its end, used to contain waste material discharged from the bottom of the cavity; the lower slag trap opening 240 is also connected to an exhaust vent 250, which can smoothly exhaust the gas inside the lower slag trap opening 240 out of the mold. The inlet 200 is equipped with a sprue sleeve 260, and the moving mold base plate 110 is equipped with a flow divider cone 270 that cooperates with the sprue sleeve 260 to ensure the concentration and directionality of the molten metal injection.

[0035] Specifically, such as Figure 1 As shown, the mold also includes an ejection mechanism 280, located on the side of the moving mold mechanism opposite to the fixed mold mechanism, which can automatically eject the molded part after mold opening; the cooling mechanism includes cooling pipes (not shown in the figure) installed in the moving mold insert 120, side module 130, fixed mold base plate 160, and fixed mold insert 170, which can be used to uniformly cool key parts of the mold by introducing cooling medium; such as Figure 2 and Figure 4 As shown, the guiding mechanism includes a guide post 290 disposed on the fixed mold base plate 150 and a guide sleeve 300 disposed on the moving mold base plate 100 and cooperating with the guide post 290, to ensure precise alignment during the mold closing process.

[0036] It is worth mentioning that the side of the moving mold base plate 100 is provided with a fixing bracket 310 for fixing the side cylinder 140, providing a stable foundation for the lateral core pulling movement. The sides of the moving mold insert 120 and the fixed mold insert 170 have an angle, which constitutes a demolding angle, making the resistance of the die casting less when ejected.

[0037] During operation, molten metal is injected through the inlet 200 and smoothly and evenly fills the mold cavity via the surrounding flow channel 180 and multiple branch channels 190. The side mold mechanism distributed around the perimeter enables flexible forming of complex shapes. During filling, the overflow system captures and discharges gas and cold material from the end of the mold cavity in a timely manner through multiple sets of upper and lower slag discharge channels 220. The cooling mechanism controls the solidification process, and finally, the ejection mechanism 280 ejects the formed part. This invention, through optimized flow channel layout and a multi-directional coordinated venting and slag discharge system, achieves smooth filling and efficient venting of molten metal, significantly reducing casting defects such as porosity and cold shuts, improving the density, surface quality, and mechanical properties of die-cast parts, while also increasing production efficiency and automation. It is particularly suitable for the production of high-quality die-cast parts such as motor housings for new energy vehicles.

[0038] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, 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.

[0039] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A die-casting mold for an electric motor housing, characterized in that, include: The moving mold mechanism includes a moving mold base plate (100), a moving mold bottom plate (110) mounted on the moving mold base plate (100), and a moving mold insert (120) disposed on the moving mold bottom plate (110). The side mold mechanism is respectively arranged around the moving mold base plate (100), including the side module (130) and the side cylinder (140) that drives the side module (130) to move. The fixed mold mechanism includes a fixed mold base plate (150) that cooperates with the moving mold base plate (100), a fixed mold base plate (160) that is installed on the fixed mold base plate (150) and cooperates with the moving mold base plate (110), and a fixed mold insert (170) that is installed on the fixed mold base plate (160) and cooperates with the moving mold insert (120). The fixed mold base plate (160), the moving mold base plate (110) and the side module (130) form the outer wall surface of the workpiece cavity. The moving mold insert (120) and the fixed mold insert (170) form the inner wall surface of the cavity. The fixed mold base plate (150) is provided with a surrounding flow channel (180) on both sides of the cavity. The surrounding flow channel (180) is provided with a plurality of branch flow channels (190) that communicate with the cavity. The fixed mold base plate (150) is provided with a material inlet (200) that communicates with the surrounding flow channel (180). The overflow system includes an upper slag discharge trough (210) disposed on the side of the fixed mold base plate (150) away from the inlet (200) and communicating with the cavity, and a lower slag discharge trough (220) disposed on the moving mold base plate (110) and communicating with the cavity. The upper slag discharge trough (210) has two sections respectively disposed next to the two surrounding flow channels (180), and the lower slag discharge trough (220) has multiple sections circumferentially disposed around the outer periphery of the cavity.

2. The motor housing die-casting mold according to claim 1, characterized in that, The upper slag discharge trough (210) is provided with a slag bag opening (230) at its end.

3. The motor housing die-casting mold according to claim 1, characterized in that, The lower slag discharge trough (220) is provided with a slag bag opening (240) at its end.

4. The motor housing die-casting mold according to claim 3, characterized in that, The slag bag opening (240) is connected to an exhaust vent (250).

5. The motor housing die-casting mold according to claim 1, characterized in that, The inlet (200) is provided with a sprue sleeve (260), and the moving mold base plate (110) is provided with a flow divider cone (270) that cooperates with the sprue sleeve (260).

6. The motor housing die-casting mold according to claim 1, characterized in that, It also includes an ejection mechanism (280), which is disposed on the side of the moving mold mechanism opposite to the fixed mold mechanism.

7. The motor housing die-casting mold according to claim 1, characterized in that, It also includes a cooling mechanism, which includes cooling pipes disposed in the moving mold insert (120), the side module (130), the fixed mold base plate (160) and the fixed mold insert (170).

8. The motor housing die-casting mold according to claim 1, characterized in that, It also includes a guiding mechanism, which includes a guide post (290) disposed on the fixed mold base plate (150) and a guide sleeve (300) disposed on the moving mold base plate (100) and cooperating with the guide post (290).

9. A die-casting mold for a motor housing according to claim 1, characterized in that, The side of the moving mold base plate (100) is provided with a fixing bracket (310) for fixing the side cylinder (140).

10. A die-casting mold for a motor housing according to claim 1, characterized in that, The sides of the moving mold insert (120) and the fixed mold insert (170) are inclined.

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