Motor end cover casting mold

Abstract

The application relates to a motor end cover casting mold and belongs to the technical field of casting molds. The casting mold comprises a lower mold piece, a mold plate, a sand core and a pouring assembly. The lower mold piece is provided with a plurality of limiting grooves. The mold plate is provided with a cavity mold. The cavity mold is used for molding the lower mold piece to form a cavity. The lower end protrusion of the sand core comprises a limiting area and a positioning area. The limiting area and the positioning area are arranged to form the lower end protrusion of the sand core. A plurality of limiting protrusions are distributed at equal intervals on the outer periphery of the limiting area. The outer periphery length of the positioning area is greater than or smaller than the interval between two adjacent limiting protrusions. The limiting protrusions are arranged in one-to-one correspondence with the limiting grooves. The sand core is used for being placed in the cavity of the lower mold piece. The pouring assembly is arranged on the lower mold piece. The pouring assembly comprises a straight sprue and a conveying pipe. The first end of the conveying pipe is connected with the straight sprue. The second end of the conveying pipe is arranged in a preset arc shape and surrounds the cavity in the circumferential direction. The conveying pipe is provided with a plurality of output ports. The output ports are communicated with the cavity. The application has the effects of improving the positioning precision and installation efficiency of the sand core.

Description

Technical Field

[0001] This application relates to the field of casting mold technology, and in particular to a casting mold for an electric motor end cap. Background Technology

[0002] Casting mold technology plays a vital role in industrial manufacturing. With the continuous development of the manufacturing industry, the requirements for casting molds are also increasing. The design and application of casting molds directly affect the quality of castings and production efficiency. In the casting production of components such as motor end caps, a well-designed casting mold can ensure the precision and performance of the product, meeting the safety and reliability requirements of motor operation. Excellent casting mold technology can also reduce production costs, enhance the market competitiveness of enterprises, and drive the casting industry towards greater efficiency and precision.

[0003] Currently, during the process of installing sand cores into the mold cavity, operators need to determine the installation direction of the sand cores in order to ensure that the casting process can proceed smoothly.

[0004] However, the above installation method requires highly skilled operators and is prone to installation errors or positioning mistakes, which can affect the reliability of casting; at the same time, it also results in low installation efficiency. Utility Model Content

[0005] To improve the positioning accuracy and installation efficiency of sand cores, this application provides a casting mold for motor end caps.

[0006] The motor end cover casting mold provided in this application adopts the following technical solution: A casting mold for an electric motor end cap includes: a lower mold part having a plurality of limiting grooves; a mold plate having a cavity mold for shaping the lower mold part into a cavity; a sand core having a lower end protrusion including a limiting area and a positioning area, the limiting area and the positioning area surrounding the lower end protrusion of the sand core, a plurality of limiting protrusions being evenly distributed around the outer periphery of the limiting area, the length of the outer periphery of the positioning area being greater than or less than the distance between two adjacent limiting protrusions, the limiting protrusions corresponding one-to-one with the limiting grooves, and the sand core being placed inside the cavity of the lower mold part; and a gating assembly disposed on the lower mold part, the gating assembly including a sprue and a delivery pipe, a first end of the delivery pipe being connected to the sprue, a second end of the delivery pipe being arranged with a preset arc and surrounding the circumference of the cavity, the delivery pipe having a plurality of output ports communicating with the cavity.

[0007] By adopting the above technical solution, the limiting grooves set in the lower mold part correspond one-to-one with the limiting protrusions on the lower end of the sand core, which can play a role in positioning and limiting the sand core, ensuring that the sand core is accurately placed in the cavity formed by the lower mold part, thus improving the accuracy and efficiency of sand core installation. The limiting area and positioning area of ​​the lower end of the sand core protrusion form a specific structure, and the difference between the outer perimeter of the positioning area and the distance between adjacent limiting protrusions can further assist in positioning and error prevention. The sprue of the casting component is used to input molten metal. The first end of the delivery pipe is connected to the sprue, and the second end is arranged in a preset arc around the cavity and has multiple output ports connected to the cavity, which allows the molten metal to flow into the cavity evenly from multiple output ports, allowing the molten metal to fill the cavity more effectively and ensuring the quality of the cast motor end cover.

[0008] Optionally, the conveying pipe includes a main conveying section and a sub-conveying section. The main conveying section includes a first horizontal section, a second horizontal section, and a third horizontal section connected in sequence. The first horizontal section is connected to the sprue. The first end of the sprue away from the first horizontal section is used to input molten metal. The third horizontal section is used to connect to the sub-conveying section, which is arranged around the circumference of the cavity.

[0009] By adopting the above technical solution, the direct sprue in the main conveying section of the conveying pipe is used to input molten metal. After entering, the molten metal flows sequentially through the first, second, and third horizontal sections. The design of each horizontal section buffers and regulates the flow of the molten metal, making the flow rate and direction more stable. The third horizontal section connects to the sub-conveying section, which surrounds the cavity circumferentially. This allows the molten metal to flow evenly into the cavity from the circumference, ensuring the filling effect of the cavity and thus improving the quality and efficiency of casting.

[0010] Optionally, the axis of the direct sprue extends vertically, and the flow area of ​​the first horizontal section is smaller than the flow area of ​​the direct sprue.

[0011] By adopting the above technical solution, the axis of the sprue extends vertically, facilitating the vertical downward flow of molten metal and ensuring its smooth entry into the delivery pipe. The flow area of ​​the first horizontal section is smaller than that of the sprue. This design allows for control and buffering of the molten metal's flow rate, reducing its velocity after entering the first horizontal section. Simultaneously, it filters out some floating impurities in the molten metal, thereby improving the quality of subsequent casting.

[0012] Optionally, the second horizontal segment is located below the first horizontal segment and the third horizontal segment.

[0013] By adopting the above technical solution, the second horizontal section is positioned below the first and third horizontal sections. This allows the molten metal to flow into the first horizontal section from the sprue when flowing in the main conveying section. Because the first horizontal section is relatively high, the molten metal has greater potential energy and can flow at a certain speed. When the molten metal flows into the lower second horizontal section, its flow path changes and its height decreases. During this process, some impurities float to the surface due to the change in flow velocity, effectively filtering impurities from the lower layer of molten metal. The molten metal then flows to the third horizontal section and enters the sub-conveyor section. The stable flow velocity better ensures that the molten metal passes evenly through the outlet of the sub-conveyor section into the mold cavity, improving the quality and stability of the casting.

[0014] Optionally, the circulation area of ​​the first horizontal segment is smaller than that of the second horizontal segment, and the circulation area of ​​the second horizontal segment is smaller than that of the third horizontal segment.

[0015] By adopting the above technical solution, the flow area of ​​the first horizontal section is smaller than that of the sprue, which can initially limit and buffer the flow of molten metal flowing in from the sprue. The flow area of ​​the first horizontal section is smaller than that of the second horizontal section, which slows down the flow rate and reduces the pressure when the molten metal flows into the second horizontal section, which is conducive to a more stable flow of molten metal and also prepares for further flow and distribution. The flow area of ​​the second horizontal section is smaller than that of the third horizontal section, which allows the molten metal to further diffuse and distribute evenly after entering the third horizontal section, which helps to make impurities float to the surface and improve the quality of the lower layer of molten metal. This allows the lower layer of molten metal to enter the mold cavity more evenly through the distribution conveyor, ensuring the uniformity and stability of molten metal filling during the casting process, thereby improving the quality of the castings.

[0016] Optionally, the lower mold has two sets of cavities, and there are two sand cores and two sub-conveying sections. The sand cores and the sub-conveying sections are arranged corresponding to the cavities, and the two sub-conveying sections are symmetrically arranged about the main conveying section.

[0017] By adopting the above technical solution, the lower mold part is equipped with two sets of cavities, which can simultaneously cast both sides of the motor end cover, improving casting efficiency; the sand core is set in correspondence with the cavity, which can accurately provide shape and space for casting, ensuring that the cast motor end cover meets the requirements; the sub-conveying section is set in correspondence with the cavity, which can accurately deliver the molten metal to the corresponding cavity, ensuring that each cavity is fully filled with molten metal; the two sub-conveying sections are symmetrically set about the main conveying section, which allows the molten metal to be evenly distributed to the two cavities, ensuring that the quality of the two castings is uniform.

[0018] Optionally, it further includes a plurality of first vent holes, which are connected to the cavity and are evenly distributed on the cavity. The first vent holes are used to vent air from the cavity.

[0019] By adopting the above technical solution, multiple first vent holes that are evenly distributed on the mold cavity and connected to the mold cavity can timely and evenly discharge the gas in the mold cavity during the casting process, ensuring the filling effect of the molten metal in the mold cavity, avoiding defects such as porosity and looseness in the casting due to gas residue, thereby improving the quality and performance of the casting.

[0020] Optionally, it also includes a second vent hole, which is connected to the sand core and is used to vent air from the sand core.

[0021] By adopting the above technical solution and setting a second vent hole connected to the sand core, the gas in the sand core can be discharged in time during the casting process, avoiding defects such as porosity and voids in the castings caused by the accumulation of gas in the sand core, thereby improving the quality and strength of the castings.

[0022] Optionally, the sand core is made of coated sand.

[0023] By adopting the above technical solution, due to the small product structure space and relatively thin sand core, coated sand is used to make the sand core instead of resin sand. Coated sand has good strength and toughness and can withstand the pressure and impact during the casting process, avoiding the sand core from cracking during the casting process and causing the casting to break. This ensures the integrity and stability of the casting and improves the casting quality of the motor end cover casting mold.

[0024] Optionally, three limiting protrusions are provided, and the line connecting two adjacent limiting protrusions to the center of the sand core is set at a 90° angle.

[0025] By adopting the above technical solution, three limiting protrusions are set on the outer periphery of the limiting area of ​​the lower end of the sand core, and the line connecting two adjacent limiting protrusions to the center of the sand core is set at a 90° angle, corresponding one-to-one with the limiting grooves on the lower mold. This setting can accurately position and limit the sand core. During the process of installing the sand core into the cavity of the lower mold, it can effectively prevent deviations and errors in the installation position of the sand core, greatly improve the installation efficiency and accuracy of the sand core, and ensure that the subsequent casting work of the casting mold can proceed smoothly.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Molten iron flows from the sprue through the casting assembly along both sides towards the circumferential outlet of the mold cavity, then flows from the outlet towards the center to cover the sand core, and finally flows out from the exhaust and slag discharge port, avoiding voids and large air bubbles, and reducing the probability of casting failure. 2. The sand core is made of coated sand, which can reduce the risk of sand core breakage and improve the casting success rate; 3. The positioning and anti-error device, which uses the limiting protrusion and limiting groove to cooperate during sand core installation, improves the installation efficiency, accuracy and precision. Attached Figure Description

[0027] Figure 1 This is a first-view schematic diagram of the motor end cover casting mold according to an embodiment of this application.

[0028] Figure 2 This is a second-view schematic diagram of the motor end cover casting mold according to an embodiment of this application.

[0029] Figure 3 This is a top view of the motor end cover casting mold according to an embodiment of this application.

[0030] Figure 4 This is a first-view schematic diagram of a sand core according to an embodiment of this application.

[0031] Figure 5 This is a second-view schematic diagram of a sand core according to an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the casting assembly according to an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures: 1. Mold plate; 11. Cavity mold; 12. Positioning part; 2. Sand core; 21. Limiting zone; 211. Limiting protrusion; 22. Positioning zone; 3. Casting assembly; 31. Direct sprue; 32. Conveying pipe; 321. Main conveying section; 3211. First horizontal section; 3212. Second horizontal section; 3213. Third horizontal section; 322. Sub-conveying section; 41. First vent; 42. Second vent; 43. Third vent. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be further described in detail below. In this embodiment, unless otherwise specified, "connection", "linking", and "fixing" are interpreted broadly, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection, and interaction between two components, etc., and can be understood according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, in the description of this embodiment, terms such as "above," "below," "left," and "right," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are used only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise stated, directional terms such as "inner" and "outer" used in this application refer to the outline of the corresponding component itself.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, this application discloses a casting mold for an electric motor end cover (hereinafter referred to as "casting mold"). The casting mold includes a lower mold part (not shown in the figure), a mold plate 1, a sand core 2, and a pouring assembly 3. It adopts a unique pouring and sand core 2 positioning structure, which achieves the effect of uniform filling of molten iron, avoiding breakage of the casting, and improving installation efficiency.

[0037] like Figure 1 , Figure 4 and Figure 5 As shown, the mold plate 1, through the cavity mold 11 set on it, can form a cavity in the sand box, thereby realizing the forming of the lower mold part and forming a lower mold part with a cavity. Since the molding process of the lower mold part is existing technology, its process and principle will not be described in detail here; existing technology can be selected according to actual needs. The sand core 2 is placed in the cavity of the lower mold part, and the casting assembly 3 is set on the lower mold part for conveying molten metal into the cavity. Through this combination, the casting of the motor end cover can be realized, improving casting efficiency and quality.

[0038] Specifically, the lower mold part is provided with several limiting grooves, thereby forming a core seat for installing the sand core 2. The limiting grooves cooperate with the limiting protrusions 211 on the sand core 2 to position and fix the sand core 2. The mold plate 1 is provided with two sets of cavity molds 11, which are the upper and lower ends of the same casting, respectively. The lower mold part is provided with two sets of cavities, thereby improving processing efficiency by producing two castings from one mold.

[0039] like Figure 1 , Figure 4 and Figure 6As shown, furthermore, positioning parts 12 can be provided on the template 1, and the number of positioning parts 12 at both ends of the template 1 can be different, so that when installing the template 1, the orientation can be determined according to the positioning parts 12 on the template 1, thereby improving installation accuracy and efficiency. The specific structure of the positioning parts 12 can be set as needed, and a corresponding structure can be set on the structure of the template 1 to enable the positioning parts 12 to be installed.

[0040] like Figure 1 , Figure 4 and Figure 6 As shown, the lower protrusion of the sand core 2 includes a limiting area 21 and a positioning area 22, which together form the lower protrusion of the sand core 2. Several limiting protrusions 211 are evenly distributed around the outer periphery of the limiting area 21. The length of the outer periphery of the positioning area 22 is greater than or less than the distance between two adjacent limiting protrusions 211. Because the cavity inside the motor end cover has a small space, the sand core 2 used is usually made of coated sand. The coated sand is heat-formed to ensure sufficient strength and prevent breakage. The limiting protrusions 211 are generally block-shaped and integrally formed from the same material as the sand core 2. The positioning area 22 assists in accurately installing the sand core 2 into the cavity of the lower mold; its shape can be designed according to actual needs. The line connecting two adjacent limiting protrusions 211 to the center of the sand core 2 forms a 90° angle. In this embodiment, there are three limiting protrusions 211, and the positioning area 22 is empty. This asymmetrical design between the empty positioning area 22 and the limiting area 21 allows for identification of the installation direction of the sand core 2, ensuring the stability and accuracy of the sand core 2 installation. The limiting protrusions 211 and limiting grooves are arranged one-to-one. When the sand core 2 is placed in the cavity of the lower mold, the limiting protrusions 211 embed into the limiting grooves, achieving positioning and preventing incorrect installation of the sand core 2, thus improving the installation efficiency of the sand core 2. There are two sand cores 2, each corresponding to one of the two cavities.

[0041] The casting assembly 3 includes a sprue 31 and a delivery pipe 32. The first end of the delivery pipe 32 is connected to the sprue 31, and the second end of the delivery pipe 32 is set with a preset arc and surrounds the cavity. The delivery pipe 32 has multiple outlets, which connect to the cavity. The sprue 31 and the delivery pipe 32 are typically made of high-temperature resistant materials, but the material is not limited. The preset arc of the delivery pipe 32 allows the molten metal to be distributed more evenly around the cavity. The shape of the outlets can be set as needed; their function is to deliver the molten metal into the cavity.

[0042] like Figure 1 , Figure 4 and Figure 6As shown, the conveying pipe 32 includes a main conveying section 321 and a sub-conveyor section 322. The main conveying section 321 includes a first horizontal section 3211, a second horizontal section 3212, and a third horizontal section 3213 connected in sequence. The first horizontal section 3211 connects to the sprue 31, and the first end of the sprue 31 away from the first horizontal section 3211 is used to input molten metal. The third horizontal section 3213 connects to the sub-conveyor section 322, which surrounds the circumference of the mold cavity. There are two sub-conveyor sections 322, symmetrically arranged about the main conveying section 321, and each corresponding to the mold cavity. The axis of the sprue 31 extends vertically, and the flow area of ​​the first horizontal section 3211 is smaller than that of the sprue 31. This change in flow area can buffer and control the flow rate, and also filter out some floating impurities. The second horizontal section 3212 is located below the first horizontal section 3211 and the third horizontal section 3213. This arrangement allows slag to float more effectively during the flow of molten metal, while the molten iron flows from the lower layer into the mold cavity, ensuring casting quality. The flow area of ​​the first horizontal section 3211 is smaller than that of the second horizontal section 3212, and the flow area of ​​the second horizontal section 3212 is smaller than that of the third horizontal section 3213. This gradually increasing flow area design allows the flow rate of the molten metal to gradually stabilize, avoiding casting defects caused by excessive flow rate, while also facilitating slag to float and improving the cleanliness of the lower layer of molten iron.

[0043] like Figure 1 , Figure 4 and Figure 6 As shown, the casting mold also includes multiple first vent holes 41 and one second vent hole 42. The first vent holes 41 are connected to the mold cavity and are evenly distributed on the mold cavity, used for venting the mold cavity. The second vent hole 42 is connected to the sand core 2 and used for venting the sand core 2. The vent holes can be equipped with venting pins to expel gas from the mold cavity and sand core 2, preventing defects such as porosity in the casting. The casting mold can also be equipped with a third vent hole 43, used to expel gas from the sand box during the molding process between the mold plate 1 and the sand box.

[0044] It is understandable that the casting mold also includes necessary structures for connection, support, positioning and limiting functions, so that the casting mold can operate normally; the shape, size, material and quantity of each part of the casting mold can be determined as needed, as long as the corresponding functions can be achieved.

[0045] The implementation principle of this embodiment is as follows: The motor end cover casting mold of this embodiment improves the installation efficiency and accuracy of the sand core 2 through the unique positioning structure of the sand core 2, namely the cooperation between the limiting protrusion 211 and the limiting groove, and the setting of the positioning area 22. Using coated sand to make the sand core 2 avoids the problem of sand core 2 breakage. The design of the delivery pipe 32 of the pouring component 3, through the variation of the flow area of ​​different horizontal sections and the setting of the preset curvature, enables the molten metal to be evenly distributed around the cavity, while controlling the flow rate and filtering impurities, ensuring the quality of casting. The setting of the vent hole effectively discharges the gas in the cavity and the sand core 2, avoiding the generation of casting defects.

[0046] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A casting mold for an electric motor end cap, characterized in that, include: The lower mold component is provided with a plurality of limiting grooves; A mold plate (1) is provided on the mold plate (1), and the mold cavity (11) is used to shape the lower mold part to form a cavity; The sand core (2) has a lower protrusion including a limiting area (21) and a positioning area (22). The limiting area (21) and the positioning area (22) surround the lower protrusion of the sand core (2). A number of limiting protrusions (211) are evenly distributed on the outer periphery of the limiting area (21). The length of the outer periphery of the positioning area (22) is greater than or less than the distance between two adjacent limiting protrusions (211). The limiting protrusions (211) are corresponding to the limiting grooves one by one. The sand core (2) is used to be placed in the cavity of the lower mold. A casting assembly (3) is disposed on the lower mold. The casting assembly (3) includes a sprue (31) and a delivery pipe (32). The first end of the delivery pipe (32) is connected to the sprue (31). The second end of the delivery pipe (32) is set with a preset arc and surrounds the cavity. The delivery pipe (32) is provided with multiple output ports, and the output ports are connected to the cavity.

2. The motor end cover casting mold according to claim 1, characterized in that, The conveying pipe (32) includes a main conveying section (321) and a sub-conveying section (322). The main conveying section (321) includes a first horizontal section (3211), a second horizontal section (3212), and a third horizontal section (3213) connected in sequence. The first horizontal section (3211) is connected to the sprue (31). The first end of the sprue (31) away from the first horizontal section (3211) is used to input molten metal. The third horizontal section (3213) is used to connect to the sub-conveying section (322). The sub-conveying section (322) is arranged around the circumference of the cavity.

3. The motor end cover casting mold according to claim 2, characterized in that, The axis of the direct sprue (31) extends vertically, and the flow area of ​​the first horizontal section (3211) is smaller than the flow area of ​​the direct sprue (31).

4. The motor end cover casting mold according to claim 2, characterized in that, The second horizontal segment (3212) is located below the first horizontal segment (3211) and the third horizontal segment (3213).

5. The motor end cover casting mold according to claim 2, characterized in that, The flow area of ​​the first horizontal segment (3211) is smaller than the flow area of ​​the second horizontal segment (3212), and the flow area of ​​the second horizontal segment (3212) is smaller than the flow area of ​​the third horizontal segment (3213).

6. The motor end cover casting mold according to claim 2, characterized in that, The lower mold has two sets of cavities. The sand core (2) and the sub-conveying section (322) are provided in two. The sand core (2) and the sub-conveying section (322) are both arranged corresponding to the cavities. The two sub-conveying sections (322) are symmetrically arranged about the main conveying section (321).

7. The motor end cover casting mold according to claim 1, characterized in that, It also includes a plurality of first vent holes (41), which are connected to the cavity. The plurality of first vent holes (41) are evenly distributed on the cavity and are used to vent the cavity.

8. The motor end cover casting mold according to claim 1, characterized in that, It also includes a second vent (42), which is connected to the sand core (2) and is used to vent the sand core (2).

9. The motor end cover casting mold according to claim 1, characterized in that, The sand core (2) is made of coated sand.

10. The motor end cover casting mold according to claim 1, characterized in that, The limiting protrusion (211) is provided in three parts, and the line connecting two adjacent limiting protrusions (211) and the center of the sand core (2) is set at a 90° angle.

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