Motor bottom shell injection mold

Abstract

The utility model relates to a motor bottom shell injection mold which comprises a fixed mold body and a movable mold body, the movable mold body and the fixed mold body are matched in an opening and closing mode to complete injection molding of a motor bottom shell, a plurality of female mold bodies are arranged on the movable mold body, a plurality of mold core bodies are arranged on the fixed mold body, and the number of the mold core bodies is matched with the number of the female mold bodies. The mold cores are arranged on the movable mold and correspond to the female molds one to one, when the mold cores and the female molds are closed, a forming cavity matched with the outline of a motor bottom shell is formed between the mold cores and the female molds, a glue injection nozzle is arranged on the movable mold, an injection molding passage is arranged on the female mold, the glue injection nozzle is communicated with the injection molding passage, and the injection molding passage is communicated with the mold cores. And the injection molding channels penetrate through the female mold one by one and face the interior of the forming cavity. The motor bottom shell forming mold has the effect of improving the production efficiency of the motor bottom shell.

Description

Technical Field

[0001] The present application relates to the field of motor bottom shell production, and in particular to an injection mold for a motor bottom shell. Background Art

[0002] The motor bottom case is a protective barrier for the motor, ensuring that internal components are protected from external damage, providing stable support, and reducing electromagnetic interference to ensure stable operation of the motor.

[0003] The motor bottom shell is made of many materials (such as metal, plastic, etc.). In order to improve its production efficiency, the plastic motor bottom shell is usually formed in one piece by injection molding to simplify the processing efficiency of the motor bottom shell. Figure 7 As shown, it is necessary to process the motor bottom shell as shown in the figure. A set of injection molds is provided to match it. The processing of the motor bottom shell is completed through the opening and closing cooperation of the movable mold and the fixed mold, which is highly practical.

[0004] However, in actual application, the inventors found that the existing mold has many colloid injection nozzles and is connected to the motor bottom shell molding cavity. After the movable mold and the fixed mold are separated, the motor bottom shell is ejected by the ejector. At this time, many injection nozzles remain in the motor bottom shell. Subsequently, the operator still needs to spend a lot of time to clean the nozzles of the injection-molded motor bottom shell, which is not conducive to improving the production efficiency of the motor bottom shell. There is room for improvement. Utility Model Content

[0005] In order to improve the production efficiency of the motor bottom shell, the present application provides a motor bottom shell injection mold.

[0006] The motor bottom shell injection mold provided in this application adopts the following technical solution:

[0007] A motor bottom shell injection mold includes a fixed mold and a movable mold. The movable mold cooperates with the fixed mold to open and close to complete the injection molding of the motor bottom shell. The movable mold is provided with several groups of concave molds, and the fixed mold is provided with several groups of cores. The number of groups of cores is adapted to the number of groups of concave molds, and the cores correspond to the concave molds one by one. When the cores are combined with the concave molds, a molding cavity adapted to the contour of the motor bottom shell is formed between the cores and the concave mold. The movable mold is provided with a glue injection nozzle, and the concave mold is provided with an injection passage. The glue injection nozzle is connected to the injection passage. The injection passages pass through the concave molds one by one and face into the molding cavity.

[0008] By adopting the above technical solution, several groups of concave molds are provided on the movable mold, and several groups of cores are provided on the fixed mold. Through the cooperation of several groups of concave molds and cores, several motor bottom shells can be produced at the same time, which is beneficial to increasing the production efficiency of the motor bottom shell; the glue injection nozzle is connected to the injection channel, and then connected to any concave mold again through the injection channel, so as to achieve the purpose of injecting colloid into any concave mold, which is beneficial to reducing the water inlet of the motor bottom shell after injection molding production, and plays a positive guiding role in improving the production efficiency of the motor bottom shell.

[0009] Preferably, a mounting hole is provided on the fixed mold, and the core is detachably mounted in the mounting hole.

[0010] By adopting the above technical solution, since the core and the fixed mold are detachably connected, that is, the core and the fixed mold are separated, it is convenient to replace or maintain the core. Compared with the conventional core and fixed mold integrally formed, when the core of the present application is damaged, the core can be disassembled along the fixed mold and replaced with a new core without replacing the entire fixed mold, thereby reducing maintenance costs.

[0011] Preferably, a side extraction hole assembly is further included, which includes two groups of core pulling blocks, inclined guide pillars and ejector pins. The two groups of core pulling blocks are symmetrically arranged on both sides of the core along the core arrangement direction. The inclined guide pillars are installed on the movable mold, and the ejector pins are installed on the core pulling blocks, and the ejector pins are movable through the core. When the movable mold and the fixed mold are closed, the inclined guide pillars drive the core pulling blocks to carry the ejector pins to move toward the core; when the movable mold and the fixed mold are opened, the inclined guide pillars drive the core pulling blocks to carry the ejector pins to move away from the core.

[0012] By adopting the above technical solution, the side wall of the motor bottom shell is punched through the side punching assembly. When the fixed mold and the movable mold are separated, the power generated by the separation of the fixed mold and the movable mold is utilized to cause the inclined guide column to drive the core pulling block to move away from the core, thereby separating the ejector pin from the formed motor bottom shell. After the motor bottom shell is produced in this way, the operator does not need to punch the side wall of the motor bottom shell again, thereby reducing the production time of the motor bottom shell.

[0013] Preferably, a T-slot is provided on the core-pulling block, and the fixed end of the ejector pin is clamped in the T-slot.

[0014] By adopting the above technical solution, as the working time of the injection molding mold increases, the ejector pin may be deformed or worn. Therefore, the ejector pin is clamped through the T-slot so that the ejector pin can be stably installed on the core pulling block. At the same time, it is also convenient to disassemble the ejector pin along the core pulling block so as to replace it with a new one.

[0015] Preferably, a clamping platform is provided in the mounting hole, and the clamping platform is used to clamp the core, and the tolerance fitting relationship between the clamping platform and the core is an interference fit.

[0016] By adopting the above technical solution, the stability of the core when installed on the movable mold is improved through the clamping effect of the clamping table. At the same time, since the tolerance matching relationship between the clamping table and the core is an interference fit, the core can be installed on the movable mold without using other fixing tools. The installation method is simple and is conducive to reducing the gap between the movable mold and the core, thereby reducing the probability of a sprue appearing at the connection between the movable mold and the core due to the gap between the movable mold and the core after injection molding.

[0017] Preferably, the injection molding passage includes a main passage and two groups of sub-passes, the main passage is arranged in an arc shape on the die, the two groups of sub-passes are respectively connected to the two ends of the main passage, the sub-passes include several groups of branches, and several groups of branches respectively pass through the die.

[0018] By adopting the above technical solution, sub-paths are formed by branches at both ends of the main path, and then the colloid in the main path is transported to the molding cavity. As a result, any molding cavity has only a single injection port for the colloid to enter the molding cavity, reducing the number of water outlets.

[0019] Preferably, the main road is centrally symmetrically arranged on the die, and the glue injection nozzle is connected to the main road along the symmetry center of the main road.

[0020] By adopting the above technical solution, since the injection nozzle is located at the symmetrical center of the main path, the distance required for the colloid injected into the main path along the injection nozzle to reach both ends of the main path is the same. When the movable mold and the fixed mold are closed, the colloid in the main path can flow into the molding cavity along several sub-paths at the same time, reducing the probability of different amounts of colloid injected into different molding cavities along the sub-paths due to the colloid being unable to enter the molding cavity in time.

[0021] Preferably, a glue feed channel is provided on any one of the cores, the glue feed channel runs through the core and is connected to the molding cavity, and when the movable mold and the fixed mold are clamped, the glue inlet of the glue feed channel corresponds to the glue outlet of the branch.

[0022] By adopting the above technical solution, when the movable mold and the fixed mold are closed, the glue inlet of the glue flow channel is exactly connected with the glue outlet of the branch path. Through the cooperation between the glue flow channel and the branch path, the glue in the branch path can smoothly enter the molding cavity along the glue flow channel.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The glue injection nozzle is connected to the injection channel, and then connected to any cavity through the injection channel to achieve the purpose of injecting glue into any cavity, which is beneficial to reduce the water inlet of the motor bottom shell after injection molding and plays a positive guiding role in improving the production efficiency of the motor bottom shell;

[0025] 2. The side wall of the motor bottom shell is punched with a side punching assembly, eliminating the need for operators to punch holes on the side wall of the motor bottom shell again, thus reducing the production time of the motor bottom shell;

[0026] 3. Because the injection nozzle is located at the symmetrical center of the main path, the distance required for the colloid injected into the main path along the injection nozzle to reach both ends of the main path is the same, reducing the probability of the colloid being unable to enter the molding cavity in time due to the different distances the colloid reaches at both ends of the main path along the injection nozzle, resulting in different amounts of colloid injected into different molding cavities along the sub-path. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of an injection mold for a motor bottom shell according to an embodiment of the present application.

[0028] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of a motor bottom shell injection mold along the axis shown.

[0029] Figure 3 This is a structural schematic diagram of a movable mold in an injection mold for a motor bottom shell according to an embodiment of the present application.

[0030] Figure 4 This is a structural schematic diagram of a concave mold in an injection mold for a motor bottom shell according to an embodiment of the present application.

[0031] Figure 5 This is a schematic diagram of the front structure of a fixed mold in an injection mold for a motor bottom shell according to an embodiment of the present application.

[0032] Figure 6 This is a schematic diagram of the matching relationship between the fixed mold and the core in an injection mold for a motor bottom shell according to an embodiment of the present application;

[0033] Figure 7 This is a schematic diagram of the motor bottom case.

[0034] Explanation of the accompanying symbols: 1. Fixed mold; 2. Moving mold; 3. Concave mold; 4. Core; 5. Molding cavity; 6. Glue injection nozzle; 7. Injection channel; 71. Main channel; 72. Sub-channel; 721. Branch channel; 8. Mounting hole; 81. Clamping platform; 9. Side extraction hole assembly; 91. Core pulling block; 911. T-slot; 92. Inclined guide column; 93. Ejector pin; 10. Glue inlet channel; 11. Guide groove; 111. Limit block; 12. Guide hole. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The present application embodiment discloses a motor bottom shell injection mold. Figure 1 and Figure 2 as well as Figure 4 A motor bottom shell injection mold includes a fixed mold 1 and a movable mold 2. The movable mold 2 cooperates with the fixed mold 1 to open and close to complete the injection molding of the motor bottom shell. The movable mold 2 is provided with several groups of concave molds 3, and the fixed mold 1 is provided with several groups of cores 4. The number of cores 4 groups matches the number of concave molds 3, and the cores 4 correspond to the concave molds 3 one by one. When the cores 4 and the concave molds 3 are closed, a molding cavity 5 that matches the contour of the motor bottom shell is formed between the cores 4 and the concave molds 3. A glue injection nozzle 6 is provided on the movable mold 2, and an injection passage 7 is provided on the concave mold 3. The glue injection nozzle 6 is connected to the injection passage 7. The injection passages 7 pass through the concave molds 3 one by one and face the molding cavity 5.

[0037] First of all, it should be noted that the "several groups of dies 3" and "several groups of cores 4" in this embodiment are preferably provided with four groups of dies 3 and cores 4 respectively, and the four groups of cores 4 are evenly distributed on the core 4 along the length direction of the fixed mold 1. Similarly, the four groups of dies 3 are evenly distributed on the surface of the movable mold 2 facing the core 4 along the length direction of the movable mold 2. Through the cooperation of the four groups of dies 3 and the four groups of cores 4, the injection molding of four motor bottom shells can be completed at the same time. In other embodiments, additions or subtractions can be made according to actual production needs and the size of the injection mold.

[0038] Specifically, the fixed mold 1 and the movable mold 2 are respectively installed on the injection molding machine. By starting the injection molding machine, the movable mold 2 can be moved closer to or away from the fixed mold 1. The injection molding machine provides power for the movable mold 2 to move toward the fixed mold 1, thereby realizing the opening and closing of the fixed mold 1 and the movable mold 2. When the fixed mold 1 and the movable mold 2 are closed, the injection nozzle 6 injects hot melt glue into the injection passage 7, and injects the glue into the molding cavity 5 through the injection passage 7, thereby realizing the injection molding of the motor bottom shell.

[0039] Furthermore, when the fixed mold 1 is separated from the movable mold 2, the female mold 3 synchronously follows the movement of the movable mold 2, thereby separating the female mold 3 from the core 4, and the motor bottom shell after injection molding will fall off along the molding cavity 5, completing the processing of the motor bottom shell.

[0040] Therefore, the glue injection nozzle 6 is used as the main glue injection port. After the movable mold 2 and the fixed mold 1 are closed, when the colloid passes through the glue injection nozzle 6, the colloid in the glue injection nozzle 6 is again transported to the four molding cavities 5 (the number of groups of the core 4 and the die 3 mentioned above is four groups respectively) through the injection passage 7, so that there is only a single passage for the colloid to enter in any molding cavity 5. At this time, there is only one sprue on the molded motor bottom shell, or there is no sprue on the molded motor bottom shell (there is a cross-section surface). The operator only needs to polish the motor bottom shell again to eliminate the sprue or uneven surface, which plays a positive guiding role in improving the production efficiency of the motor bottom shell.

[0041] Reference Figure 2 and Figure 3 as well as Figure 5 , and also includes a side withdrawal hole assembly 9, which includes two groups of core pulling blocks 91, inclined guide pillars 92 and ejector pins 93. The two groups of core pulling blocks 91 are symmetrically arranged on both sides of the core 4 along the arrangement direction of the core 4, the inclined guide pillars 92 are installed on the movable mold 2, and the ejector pins 93 are installed on the core pulling blocks 91, and the ejector pins 93 are movable through the core 4. When the movable mold 2 and the fixed mold 1 are closed, the inclined guide pillars 92 drive the core pulling blocks 91 to carry the ejector pins 93 to move toward the core 4; when the movable mold 2 and the fixed mold 1 are opened, the inclined guide pillars 92 drive the core pulling blocks 91 to carry the ejector pins 93 to move away from the core 4.

[0042] Specifically, four inclined guide pillars 92 are provided, and the four inclined guide pillars 92 are arranged in a rectangular array on the movable mold 2 along the corners of the movable mold 2. The four inclined guide pillars 92 are inclined along the surface of the movable mold 2 toward the edge of the movable mold 2. The four inclined guide pillars 92 pass through the movable mold 2 and extend toward the fixed mold 1.

[0043] Furthermore, the components and installation methods of the two sets of core pulling blocks 91 are the same. For ease of description, the following description will focus on either set of core pulling blocks 91. The core pulling blocks 91 have guide holes 12 extending from the center line of the core pulling blocks 91 toward the edges thereof. The guide holes 12 are slidably engaged with the inclined guide posts 92.

[0044] Correspondingly, in order to improve the stability of the core pulling block 91 when it moves along the fixed mold 1, a guide groove 11 is opened on the fixed mold 1. The groove width of the guide groove 11 and the length dimension tolerance of the core pulling block 91 are clearance fit, so that the core pulling block 91 can slide smoothly along the guide groove 11. At the same time, limiting blocks 111 are provided at both ends of the guide groove 11 along the length direction. When the core pulling block 91 is located in the guide groove 11, a limiting portion is formed between the limiting block 111 and the guide groove 11, thereby limiting the sliding of the core pulling block 91 along the limiting portion, reducing the deflection of the core pulling block 91 when it moves along the fixed mold 1.

[0045] Therefore, the side wall of the motor bottom shell is punched by the side punching assembly 9. When the fixed mold 1 and the movable mold 2 are separated, the power generated by the separation of the fixed mold 1 and the movable mold 2 is utilized to make the inclined guide column 92 drive the core pulling block 91 to move away from the core 4, thereby separating the ejector pin 93 from the formed motor bottom shell. The motor bottom shell produced in this way does not require the operator to punch the side wall of the motor bottom shell again, thereby reducing the production time of the motor bottom shell.

[0046] Reference Figure 2 and Figure 5 A T-slot 911 is provided on the core pulling block 91 , and the fixed end of the ejector pin 93 is clamped in the T-slot 911 .

[0047] Specifically, the T-slot 911 is recessed along the thickness direction of the core pulling block 91, and one end of the T-slot 911 is open toward the core 4. When the ejector pin 93 needs to be installed, the ejector pin 93 only needs to be clamped into the T-slot 911 and fixed with a rubber plug (not shown in the figure). The operation is simple.

[0048] Its function is that as the working time of the injection molding die increases, the ejector pin 93 may be deformed or worn. Therefore, the ejector pin 93 is clamped through the T-slot 911 so that the ejector pin 93 can be stably installed on the core pulling block 91. At the same time, it is also convenient to disassemble the ejector pin 93 along the core pulling block 91 to facilitate replacement of a new ejector pin 93.

[0049] Continue to refer to Figure 6 The fixed mold 1 is provided with a mounting hole 8, and the core 4 is detachably mounted in the mounting hole 8. Since the core 4 and the fixed mold 1 are detachably connected, that is, the core 4 and the fixed mold 1 are separated, it is convenient to replace or maintain the core 4. Compared with the conventional method of integrally forming the core 4 and the fixed mold 1, when the core 4 of the present application is damaged, the core 4 can be removed along the fixed mold 1 and replaced with a new core 4 without replacing the entire fixed mold 1, thereby reducing maintenance costs. The core 4 can be fixed to the fixed mold 1 by bolts for easy removal.

[0050] In this embodiment, a clamping platform 81 is preferably provided within the mounting hole 8. The clamping platform 81 is used to clamp the core 4. The clamping platform 81 and the core 4 have an interference fit. The clamping platform 81 is concentrically arranged with the mounting hole 8 and is located at the end of the fixed mold 1 facing the die 3. The diameter of the clamping platform 81 is larger than the diameter of the mounting hole 8, thereby clamping the core 4. Even if the core 4 is subjected to external forces, the core 4 can still maintain a stable position.

[0051] Through the above process, the clamping action of the clamping platform 81 improves the stability of the core 4 when installed on the movable mold 2. At the same time, since the tolerance fitting relationship between the clamping platform 81 and the core 4 is an interference fit, the core 4 can be installed on the movable mold 2 without using other fixing tools. The installation method is simple and helps to reduce the gap between the movable mold 2 and the core 4, thereby reducing the probability of a water outlet appearing at the connection between the movable mold 2 and the core 4 due to the gap between the movable mold 2 and the core 4 after injection molding.

[0052] Reference Figure 3 and Figure 4 The injection molding passage 7 includes a main passage 71 and two groups of sub-passes 72. The main passage 71 is arranged in an arc shape on the die 3. The two groups of sub-passes 72 are respectively connected to the two ends of the main passage 71. The sub-passes 72 include several groups of passes 721, and the several groups of passes 721 respectively pass through the die 3.

[0053] First, the “several groups of branches 721 ” can be added or subtracted according to the number of cores 4 . In this embodiment, two branches 721 are provided, that is, any sub-path 72 has two branches 721 , thereby forming four branches 721 to meet the purpose of injecting colloid into the four molding cavities 5 .

[0054] Specifically, after the colloid enters the main path 71, it is diverted through the main path 71, so that the colloid in the main path 71 can be diverted through the sub-path 72, and the sub-paths 72 are formed by branches at both ends of the main path 71. Then, the colloid in the main path 71 is transported to the molding cavity 5. As a result, any molding cavity 5 has only a single injection port for the colloid to enter the molding cavity 5, reducing the amount of water outlet.

[0055] Correspondingly, the main path 71 is centrally symmetrically arranged on the die 3, and the glue injection nozzle 6 is connected to the main path 71 along the symmetric center of the main path 71. This serves the purpose of ensuring that, because the glue injection nozzle 6 is located at the symmetric center of the main path 71, the glue injected into the main path 71 through the glue injection nozzle 6 has the same distance to reach both ends of the main path 71. When the movable mold 2 and the fixed mold 1 are closed, the glue in the main path 71 can simultaneously flow into the molding cavity 5 along the four sub-paths 72. This reduces the probability of different amounts of glue being injected into different molding cavities 5 along the sub-paths 72 due to the glue not being able to enter the molding cavity 5 in time.

[0056] Reference Figure 5 A glue inlet channel 10 is provided on any core 4, and the glue inlet channel 10 runs through the core 4 and is connected to the molding cavity 5. When the movable mold 2 and the fixed mold 1 are closed, the glue inlet of the glue inlet channel 10 corresponds to the glue outlet of the branch 721.

[0057] Specifically, the glue inlet channel 10 is integrally formed with the core 4 through machine tool processing, and the diameter of the glue inlet channel 10 gradually decreases from the end where it abuts the branch 721 to the end close to the molding cavity 5, which is beneficial to increase the pressure when the colloid enters the molding cavity 5, so that the colloid can quickly fill the molding cavity 5.

[0058] Therefore, when the movable mold 2 and the fixed mold 1 are closed, the glue inlet of the glue inlet channel 10 is exactly connected to the glue outlet of the branch 721. Through the cooperation between the glue inlet channel 10 and the branch 721, the glue in the branch 721 can smoothly enter the molding cavity 5 along the glue inlet channel 10.

[0059] It should be noted here that only when the fixed mold 1 is closed, the glue injection nozzle 6 can inject the colloid into the four sub-paths 72 through the main path 71. When the amount of colloid injected into the molding cavity 5 meets the set value, the glue injection nozzle 6 will automatically close, thereby stopping the delivery of colloid to the four sub-paths 72. At this time, even if the movable mold 2 is opened, the colloid in the four sub-paths 72 will be affected by the air pressure and will be in a static state in the sub-path 72, and will not flow out along the glue outlet of the sub-path 72.

[0060] The implementation principle of the motor bottom shell injection mold in the embodiment of the present application is: colloid is injected into the main path 71 through the glue injection nozzle 6. When the colloid reaches the main path 71, since the distance between the glue outlet of the glue injection nozzle 6 and the two ends of the main path 71 is the same, when the movable mold 2 and the fixed mold 1 are closed, the four sub-paths 72 will be able to inject colloid into the molding cavity 5 at the same time, so that the amount of colloid injected into the molding cavity 5 by the four sub-paths 72 is relatively balanced, so that there is only one glue inlet channel 10 in the molding cavity 5 formed when the movable mold 2 and the fixed mold 1 are closed, which plays a positive guiding role in reducing the amount of water on the sprue on the motor bottom shell after injection molding, thereby indirectly improving the production efficiency of the motor bottom shell.

[0061] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A motor bottom shell injection mold, comprising a fixed mold (1) and a movable mold (2), wherein the movable mold (2) cooperates with the fixed mold (1) to complete the injection molding of the motor bottom shell, and is characterized in that: The movable mold (2) is provided with a plurality of groups of concave molds (3), and the fixed mold (1) is provided with a plurality of groups of cores (4). The number of groups of the cores (4) matches the number of groups of the concave molds (3), and the cores (4) correspond to the concave molds (3) one by one. When the cores (4) and the concave mold (3) are clamped, a molding cavity (5) that matches the contour of the motor bottom shell is formed between the cores (4) and the concave mold (3). The movable mold (2) is provided with a glue injection nozzle (6), and the concave mold (3) is provided with an injection passage (7). The glue injection nozzle (6) is connected to the injection passage (7), and the injection passages (7) pass through the concave mold (3) one by one and face into the molding cavity (5).

2. The motor bottom shell injection mold according to claim 1, characterized in that: The fixed mold (1) is provided with a mounting hole (8), and the core (4) can be detachably mounted in the mounting hole (8).

3. The motor bottom shell injection mold according to claim 2, characterized in that: The invention also includes a side extraction hole assembly (9), which includes two groups of core pulling blocks (91), an inclined guide column (92) and an ejector pin (93). The two groups of core pulling blocks (91) are symmetrically arranged on both sides of the core (4) along the arrangement direction of the core (4). The inclined guide column (92) is installed on the movable mold (2), and the ejector pin (93) is installed on the core pulling block (91). The ejector pin (93) is movable through the core (4). When the movable mold (2) and the fixed mold (1) are closed, the inclined guide column (92) drives the core pulling block (91) to carry the ejector pin (93) to move toward the core (4); when the movable mold (2) and the fixed mold (1) are opened, the inclined guide column (92) drives the core pulling block (91) to carry the ejector pin (93) to move away from the core (4).

4. The motor bottom shell injection mold according to claim 3, characterized in that: The core-pulling block (91) is provided with a T-shaped slot (911), and the fixed end of the ejector pin (93) is clamped in the T-shaped slot (911).

5. The motor bottom shell injection mold according to claim 4, characterized in that: A clamping platform (81) is provided in the mounting hole (8), and the clamping platform (81) is used to clamp the core (4). The tolerance fitting relationship between the clamping platform (81) and the core (4) is an interference fit.

6. The motor bottom shell injection mold according to claim 5, characterized in that: The injection molding passage (7) includes a main passage (71) and two groups of sub-passes (72), wherein the main passage (71) is arranged in an arc shape on the die (3), and the two groups of sub-passes (72) are respectively connected to the two ends of the main passage (71), and the sub-passes (72) include several groups of branches (721), and the several groups of branches (721) respectively penetrate the die (3).

7. The motor bottom shell injection mold according to claim 6, characterized in that: The main road (71) is centrally symmetrically arranged on the die (3), and the glue injection nozzle (6) is connected to the main road (71) along the symmetry center of the main road (71).

8. The motor bottom shell injection mold according to claim 7, characterized in that: A glue inlet channel (10) is provided on each of the cores (4), and the glue inlet channel (10) runs through the core (4) and is connected to the molding cavity (5). When the movable mold (2) and the fixed mold (1) are closed, the glue inlet of the glue inlet channel (10) corresponds to the glue outlet of the branch (721).

Images