A molding die for overmolded stator plastic parts

Abstract

This invention discloses a molding die for a plastic stator part, comprising a moving mold cavity and a fixed mold cavity. The moving mold cavity is formed on a moving mold core and consists of a first annular groove and several first grooves. The first grooves are arranged in an array around the outer ring of the first annular groove, and the depth of the first grooves is greater than the depth of the first annular groove. The fixed mold cavity is formed on a fixed mold core and consists of a second annular groove and several second grooves. The second grooves are arranged in an array around the outer ring of the second annular groove. The outer wall of the second annular groove corresponds to the outer wall of the first annular groove, and the width of the second annular groove is smaller than the width of the first annular groove. The side of the fixed mold core closest to the moving mold core is in contact with the surface of the annular ring. This invention enables the direct injection molding of a plastic insulating layer from the metal part. The plastic insulating layer can separate the metal part from the coil winding, and when the stator rotates at high speed, no gaps will form in the plastic part on the metal part, eliminating the risk of insulation failure.

Description

Technical Field

[0001] This invention relates to the field of overcoated stator technology, and in particular to a molding die for overcoated stator plastic parts. Background Technology

[0002] The stator core of an electric motor typically comprises metal components and a plastic insulation layer. The metal components mainly consist of a circular section stamped from silicon steel sheets and several T-shaped blocks. These T-shaped blocks are arranged in a ring array around the circular section, forming several slots for accommodating the stator windings. These slots must be covered with a plastic insulation layer to ensure electrical isolation between the stator windings and the stator core. Enamelled copper wire is then wound around the plastic insulation layer to form the stator windings, while the inner ring of the circular section is fitted onto the shaft. The inner ring area must remain uncovered by the plastic, and the plastic filling of the corresponding circular section and T-shaped blocks where the enamelled wire is wound must be complete and without gaps.

[0003] Currently, in existing technologies, plastic and metal parts are separate components. T-shaped blocks are arranged in a circular array along the inner ring. Two plastic parts are inserted into the metal parts from their respective ends through the gaps between the T-shaped blocks, and then abut against each other, thus assembling the plastic and metal parts. However, when the stator rotates at high speed, the plastic parts at both ends of the metal parts may no longer be in close contact, leading to gaps and a risk of insulation failure. Furthermore, because the plastic and metal parts are separate, they need to be assembled during production, increasing the assembly process. Summary of the Invention

[0004] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the prior art, and to provide a molding die for overmolded stator plastic parts.

[0005] A molding die for a rubber-coated stator plastic part includes:

[0006] Moving mold shell;

[0007] A moving mold core, which is mounted on a moving mold shell;

[0008] The moving mold cavity is formed on the moving mold core. The moving mold cavity is composed of a first annular groove and a plurality of first grooves. The first grooves are arranged in an array around the outer ring of the first annular groove, and the depth of the first grooves is greater than the depth of the first annular groove.

[0009] The hardware component consists of an integrally formed ring and several T-shaped blocks, with the T-shaped blocks arranged in an array around the outer ring of the ring. When the hardware component is placed in the moving mold cavity, the outer side of the ring is spaced a certain distance from the outer side of the first annular groove; the two sides of the T-shaped blocks are spaced a certain distance from the sidewall of the first groove.

[0010] Fixed mold shell;

[0011] A fixed mold core, which is mounted on a fixed mold shell;

[0012] The fixed mold cavity is formed on the fixed mold core. The fixed mold cavity is composed of a second annular groove and a number of second grooves. The second grooves are arranged in an array around the outer ring of the second annular groove. The outer wall of the second annular groove corresponds to the outer wall of the first annular groove. The width of the second annular groove is smaller than the width of the first annular groove. The side of the fixed mold core that is close to the moving mold core is in contact with the surface of the annular ring.

[0013] A further embodiment is that a movable seat is slidably fitted on the moving mold core, and an inwardly contracting upper boss is provided at one end of the movable seat near the fixed mold shell, so that the moving mold core and the upper boss form the first annular groove.

[0014] When the hardware is fitted onto the upper boss, the end of the hardware closest to the fixed mold shell protrudes from both the upper boss and the moving mold core.

[0015] The movable seat has an outwardly protruding lower boss at the end away from the fixed mold shell. The side of the lower boss away from the upper boss abuts against a second spring, so that the side of the lower boss close to the upper boss abuts against the moving mold core, and the other end of the second spring abuts against the moving mold shell.

[0016] A further embodiment is that a protruding block is provided on the side of the upper boss, and a limiting groove that matches the protruding block is opened on the inner side of the corresponding ring of the hardware.

[0017] A further embodiment is that the movable seat has a third groove arrayed on the side near the upper boss, and a first spring is fixedly connected to the bottom wall of the third groove. A push rod is fixedly connected to the end of the first spring away from the bottom wall of the third groove. When the push rod retracts into the third groove, the restoring force of the second spring is still greater than the restoring force of the first spring.

[0018] A further embodiment is that the fixed mold shell is provided with a main runner at the end away from the moving mold shell. One end of the main runner is connected to the injection molding machine, and the other end of the main runner is connected to a plurality of first vertical runners. The first vertical runners are distributed in a circular array along the main runner. Each of the first vertical runners corresponds to a second groove, and the end of the first vertical runner away from the main runner extends through the fixed mold core and extends to the bottom wall of the second groove.

[0019] A further embodiment is that the moving mold shell is provided with a plurality of second vertical flow channels at the end away from the fixed mold shell, the second vertical flow channels correspond one-to-one with the first grooves, and the end of the second vertical flow channel near the first groove is connected to a horizontal flow channel. Each horizontal flow channel is provided with two inclined heads at its end, one of which is inclined toward the first groove and the other inclined head is inclined toward the second groove.

[0020] A further embodiment is that the moving mold shell and the fixed mold shell are installed on a horizontal injection molding machine or a vertical injection molding machine; when installed on a vertical injection molding machine, the fixed mold shell is located directly above the moving mold shell.

[0021] A further option is to provide cooling water pipes on both the moving mold shell and the fixed mold shell.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a molding die for a plastic stator part with a rubber coating. Through the mutual cooperation of the moving mold cavity and the fixed mold cavity, after the hardware part is placed in the moving mold cavity, the first annular groove and the second annular groove will be interconnected, thereby forming a second plastic part during injection molding. Because the T-shaped block corresponding to the hardware part is spaced a certain distance from the side walls of the first groove on both sides; and the lower surface of the T-shaped block also maintains a certain distance from the first groove; and the fixed mold core has a second groove corresponding to the first groove, a first plastic part can be formed during injection molding. Furthermore, the first and second plastic parts are molded together as a single unit, thereby achieving direct injection molding of the plastic part insulation layer. This plastic part insulation layer can separate the hardware part from the coil winding, and when the stator rotates at high speed, no gaps will form in the plastic part on the hardware part, eliminating the risk of insulation failure. Furthermore, by positioning the end of the hardware component near the fixed mold core as a protrusion that extends beyond both the upper boss and the moving mold core, the surface of the fixed mold core contacts and compresses the hardware component during mold closing, further compressing the second spring. This ensures that the surface of the hardware component is flush with the surface of the moving mold core, preventing the inner ring of the hardware component from connecting with the annular groove during injection molding. Consequently, the inner ring of the molded hardware component will not be covered by plastic, thus avoiding any impact on the electrical and heat dissipation performance of the motor stator. This solves the problem of the inner ring of the hardware component being covered by plastic during injection molding, where the dimensional tolerances of the hardware component are often larger than those of the moving mold cavity. Finally, the molten plastic flows sequentially into the second groove through the main runner and the first vertical runner. Since the first vertical runner corresponds one-to-one with the second groove, the molten plastic can quickly and evenly fill each corresponding second groove through each first vertical runner, effectively improving the molding efficiency and quality of the plastic part. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the moving mold shell and the fixed mold shell provided in the embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the moving mold core and the fixed mold core provided in the embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the mold core provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the moving mold shell provided in an embodiment of the present invention;

[0028] Figure 5 This is provided by the embodiments of the present invention. Figure 4 A magnified view of the structure at point A in the middle;

[0029] Figure 6 This is a schematic diagram of the structure of the moving mold core provided in an embodiment of the present invention;

[0030] Figure 7 This is provided by the embodiments of the present invention. Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0031] Figure 8 This is a schematic diagram of the structure of the movable base and motor stator provided in the embodiment of the present invention. Figure 1 ;

[0032] Figure 9 This is a schematic diagram of the structure of the movable base and motor stator provided in the embodiment of the present invention. Figure 2 ;

[0033] Figure 10 This is a three-dimensional structural diagram of the movable seat provided in an embodiment of the present invention;

[0034] Figure 11 This is a cross-sectional structural diagram of the movable seat provided in an embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the adhesive injection pipe provided in an embodiment of the present invention.

[0036] Reference numerals: 1. Moving mold shell; 2. Moving mold core; 3. Moving mold cavity; 301. First groove; 302. First annular groove; 4. Movable seat; 401. Upper boss; 402. Lower boss; 403. Protrusion; 404. Third groove; 405. First spring; 406. Ejector rod; 5. Sleeve; 6. Second spring; 7. Fixed mold shell; 8. Fixed mold core; 9. Fixed mold cavity; 901. Second groove; 902. Second annular groove; 10. Hardware; 1001. Limiting groove; 11. First plastic part; 12. Second plastic part; 13. Main runner; 14. First vertical runner; 15. Second vertical runner; 16. Horizontal runner; 17. Tilt head; 18. Support rod; 19. Cooling water pipe. Detailed Implementation

[0037] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Please see Figures 1-12 This invention provides a molding die for a plastic stator part with overmolded construction, comprising:

[0040] Moving mold shell 1;

[0041] Fixed mold shell 7; wherein, the moving mold shell 1 and the fixed mold shell 7 are installed on a horizontal injection molding machine or a vertical injection molding machine; when installed on a vertical injection molding machine, the fixed mold shell 7 is located directly above the moving mold shell 1.

[0042] Movable mold core 2, which is installed at the middle of one end of the movable mold shell 1 near the fixed mold shell 7;

[0043] Moving mold cavity 3, such as Figures 4-7 As shown, the moving mold cavity 3 is opened on the moving mold core 2. The moving mold cavity 3 is composed of a first annular groove 302 and a plurality of first grooves 301. The first grooves 301 are arranged in an array around the outer ring of the first annular groove 302, and the depth of the first grooves 301 is greater than the depth of the first annular groove 302.

[0044] Hardware 10, such as Figure 6 As shown, the hardware component 10 consists of an integrally formed ring and several T-shaped blocks. The ring and the T-shaped blocks are flush in height, and the T-shaped blocks are arranged in an array around the outer ring of the ring. When the hardware component 10 is placed in the moving mold cavity 3, as shown... Figure 7 As shown, the outer side of the ring is spaced a certain distance from the outer side of the first annular groove 302, meaning there is a gap between the outer side of the ring and the first annular groove 302; the two sides of the T-shaped block are spaced a certain distance from the sidewall of the first groove 301; the end of the T-shaped block away from the ring is in contact with the first groove 301. Because the depth of the first groove 301 is greater than the depth of the first annular groove 302, the lower surface of the T-shaped block also maintains a certain distance from the first groove 301.

[0045] Fixed mold core 8, which is mounted on fixed mold shell 7;

[0046] A fixed mold cavity 9 is formed on a fixed mold core 8. During injection molding, the fixed mold core 8 corresponds to the moving mold core 2, and the fixed mold cavity 9 corresponds to the moving mold cavity 3. Figure 3 As shown, the fixed mold cavity 9 consists of a second annular groove 902 and several second recesses 901, with the second recesses 901 arranged in an array around the second annular groove 902. The outer wall of the second annular groove 902 corresponds to the outer wall of the first annular groove 302, and the width of the second annular groove 902 is smaller than the width of the first annular groove 302. The side of the fixed mold core 8 closest to the moving mold core 2 is in contact with the surface of the annulus. Therefore, after the hardware part 10 is placed in the moving mold cavity 3, the first annular groove 302 and the second annular groove 902 will be interconnected, separating the T-shaped block of the hardware part 10 from the annulus, thereby forming the second plastic part 12 during the injection molding process. Because the T-block and its two sides are separated by a certain distance from the sidewalls of the first groove 301; and the lower surface of the T-block also maintains a certain distance from the first groove 301; and the fixed mold core 8 has a second groove 901 corresponding to the first groove 301, the first plastic part 11 is formed during the injection molding process, and the first plastic part 11 and the second plastic part 12 are molded together as a single unit, thus achieving direct injection molding of the plastic insulation layer on the hardware part 10; therefore, when the stator rotates at high speed, no gaps will be generated in the plastic parts on the hardware part 10, and there is no risk of insulation failure. Furthermore, since the plastic parts are directly injection molded, no assembly is required during the production process. The first plastic part 11 and the second plastic part 12 are as follows... Figure 8 and Figure 9 As shown.

[0047] It should be noted that, compared with the prior art, the hardware component 10 of this application has a T-shaped block set on the outer ring of the ring, which makes it easier to wind enameled copper wire on the injection-molded hardware component 10 to form a stator winding.

[0048] It should be further explained that the hardware 10 is generally an outsourced product, and its tolerance is not controlled. Its dimensional tolerance is often greater than the dimensional tolerance of the moving mold cavity 3 of this application. When the hardware 10 is placed in the first annular groove 302, the upper surface of the corresponding annular part of the hardware 10 may still be a certain distance away from the upper surface of the moving mold core 2. At this time, after the moving mold core 2 and the fixed mold core 8 are closed, the upper surface of the annular part is not in contact with the lower surface of the fixed mold core 8, so that the upper surface of the annular part is also completely connected to the annular groove. As a result, the upper surface of the annular part is also covered by plastic during the injection molding process, that is, the inner ring of the hardware 10 is also covered by plastic, which affects the electrical performance and heat dissipation performance of the motor stator.

[0049] Therefore, as Figure 10 and Figure 11As shown, in this embodiment, a cylindrical movable seat 4 is slidably fitted on the moving mold core 2. The movable seat 4, near the fixed mold shell 7, has an inwardly tapering upper boss 401, meaning the cross-sectional diameter of the upper boss 401 is smaller than the cross-sectional diameter of the movable seat 4. This forms the first annular groove 302 between the moving mold core 2 and the upper boss 401. Figure 5 As shown. By providing an upper boss 401 on the movable seat 4, the metal part 10 to be injection molded is conveniently fitted onto the movable seat 4, so that the movable seat 4 can drive the metal part 10 to move. When the metal part 10 is fitted onto the upper boss 401, the end of the metal part 10 near the fixed mold shell 7 protrudes from both the upper boss 401 and the moving mold core 2. In addition, the end of the movable seat 4 away from the fixed mold shell 7 is provided with an outwardly extending lower boss 402. The side of the lower boss 402 away from the upper boss 401 abuts against a second spring 6, so that the side of the lower boss 402 near the upper boss 401 abuts against the moving mold core 2. The other end of the second spring 6 is installed in the sleeve 5, and the sleeve 5 is installed on the moving mold shell 1. Since the hardware part 10 protrudes from both the upper boss 401 and the moving mold core 2, during the mold closing process, the surface of the fixed mold core 8 contacts the annular part of the hardware part 10, squeezing the hardware part 10 until the surface of the hardware part 10 is flush with the surface of the moving mold core 2. This ensures that the inner ring (annular part) of the hardware part 10 will not connect with the annular groove during the injection molding process, and the inner ring of the injection-molded hardware part 10 will not be covered by plastic, thus not affecting the electrical performance and heat dissipation performance of the motor stator.

[0050] It should be noted that during the mold closing process, after the surface of the hardware part 10 moves down to be flush with the surface of the moving mold core 2, it can still be ensured that the depth of the first groove 301 is greater than the depth of the first annular groove 302.

[0051] Preferably, the upper boss 401 has a protruding block 403 on its side, and the inner side of the corresponding ring of the hardware 10 has a limiting groove 1001 that matches the protruding block 403. The protruding block 403 and the limiting groove 1001 work together to position the hardware 10, ensuring that the distance between the two sides of the T-shaped block of the hardware 10 and the first groove 301 or the second groove 901 is appropriate, and that the two sides of the T-shaped block do not fit against the side walls of the first groove 301 or the second groove 901.

[0052] For further information, please refer to [link / reference]. Figure 11The movable seat 4 has a third groove 404 arrayed on one side near the upper boss 401. A first spring 405 is fixedly connected to the bottom wall of the third groove 404. A push rod 406 is fixedly connected to the end of the first spring 405 away from the bottom wall of the third groove 404. When the push rod 406 retracts into the third groove 404, the restoring force of the second spring 6 is still greater than the restoring force of the first spring 405. Understandably, in the initial state, the hardware part 10 is fitted onto the upper boss 401. Under the action of the second spring 6, the lower boss 402 of the movable seat 4 abuts against the inside of the moving mold shell 1, and the ejector rod 406 extends out of the third groove 404. During the mold closing process, since the restoring force of the second spring 6 is greater than the total restoring force of all the first springs 405, the fixed mold core 8 first squeezes the ejector rod 406 back into the third groove 404, so that the side of the hardware part 10 near the moving mold core 2 is in contact with the movable seat 4, preventing the side of the inner ring of the hardware part 10 near the moving mold core 2 from being covered by plastic during the injection molding process. Then, the fixed mold core 8 continues to squeeze the hardware part 10 until the surface of the hardware part 10 is flush with the surface of the moving mold core 2. During the demolding process, after the fixed mold core 8 and the moving mold core 2 separate, under the action of the restoring force of the first spring 405, the ejector rod 406 can push the injection-molded motor stator out of the moving mold cavity 3, which facilitates the demolding of the injection-molded motor stator.

[0053] Please see Figure 2 and Figure 12 The fixed mold shell 7 has a main runner 13 at its end away from the moving mold shell 1. One end of the main runner 13 is connected to the injection molding machine, and the other end of the main runner 13 is connected to a plurality of first vertical runners 14. The first vertical runners 14 are arranged in a circular array along the main runner 13, and support rods 18 are also provided on the main runner 13 to support the first vertical runners 14. The first vertical runners 14 correspond one-to-one with the second grooves 901, and the end of the first vertical runner 14 away from the main runner 13 passes through the fixed mold core 8 and extends to the bottom wall of the second groove 901. Molten plastic flows into the second groove 901 through the main runner 13 and the first vertical runners 14 in sequence, thereby filling the fixed mold cavity 9 and the moving mold cavity 3 in sequence. After the plastic cools, the first plastic part 11 and the second plastic part 12 can be integrally formed. Since the first vertical flow channel 14 corresponds one-to-one with the second groove 901, it is beneficial for the molten plastic to quickly and evenly pass through each of the first vertical flow channels 14 and fill each corresponding second groove 901, thereby effectively improving the molding efficiency and molding quality of the plastic parts.

[0054] Furthermore, the moving mold shell 1 is provided with a plurality of second vertical flow channels 15 at the end away from the fixed mold shell 7. The second vertical flow channels 15 correspond one-to-one with the first grooves 301. The end of the second vertical flow channel 15 near the first groove 301 is connected to a horizontal flow channel 16. Each horizontal flow channel 16 is provided with two inclined heads 17 at its end. The two inclined heads 17 are symmetrically arranged along the central axis of the horizontal flow channel 16. One of them is inclined towards the first groove 301, and the other inclined head 17 is inclined towards the second groove 901. In order to avoid interference between the horizontal flow channel 16 and the inclined head 17 and the fixed mold core 8, the fixed mold core 8 is provided with grooves that are adapted to the horizontal flow channel 16 and the inclined head 17. After the moving mold shell 1 and the fixed mold shell 7 are closed, the horizontal flow channel 16 and the inclined head 17 protruding from the moving mold core 2 are accommodated in the grooves. The second vertical runner 15 and the horizontal runner 16 can also be used for injection. Since the two tilting heads 17 on the horizontal runner 16 are symmetrically arranged to inject plastic into the first groove 301 and the second groove 901 respectively, the molten plastic can be effectively filled into various positions in the mold cavity, further improving the molding efficiency and quality of the plastic parts. To facilitate venting of the mold cavity, venting grooves connected to the outside can be opened on the moving mold core 2 or the fixed mold core 8.

[0055] In some embodiments, the horizontal runner 16 and the second vertical runner 15 can also be used for venting. Since the inclined head 17 on the horizontal runner 16 corresponds one-to-one with the first groove 301 and the second groove 901, the air pressure in the mold cavity can be quickly released through the horizontal runner 16 and the second vertical runner 15 during the injection process through the first vertical runner 14, which can also improve the molding efficiency and molding quality of plastic parts.

[0056] Both the moving mold shell 1 and the fixed mold shell 7 are equipped with cooling water pipes 19, which facilitate the cooling of the fixed mold core 8 and the moving mold core 2, thus promoting the rapid cooling and molding of the motor stator.

[0057] In summary, this invention provides a molding die for a plastic stator part. Through the cooperation of the moving mold cavity 3 and the fixed mold cavity 9, after the hardware part 10 is placed in the moving mold cavity 3, the first annular groove 302 and the second annular groove 902 will be interconnected, thereby forming a second plastic part 12 during injection molding. Since the T-shaped block corresponding to the hardware part is spaced a certain distance from the side walls of the first groove 301 on both sides, and the lower surface of the T-shaped block also maintains a certain distance from the first groove 301, and the fixed mold core 8 has a second groove 901 corresponding to the first groove 301, a first plastic part 11 can be formed during injection molding. Furthermore, the first plastic part 11 and the second plastic part 12 are integrally molded, thus achieving direct injection molding of the plastic part insulation layer from the hardware part 10. This insulation layer can separate the hardware part 10 from the coil winding, and during high-speed rotation of the stator, no gaps will form in the plastic part on the hardware part 10, eliminating the risk of insulation failure. Furthermore, the end of the hardware component 10 near the fixed mold core 8 is positioned to protrude from both the upper boss 401 and the moving mold core 2. During mold closing, the surface of the fixed mold core 8 contacts and compresses the hardware component 10, further compressing the second spring 6. This ensures that the surface of the hardware component 10 is flush with the surface of the moving mold core 2, preventing the inner ring of the hardware component 10 from connecting with the annular groove during injection molding. Consequently, the inner ring of the injection-molded hardware component 10 will not be covered by plastic, thus avoiding any impact on the electrical and heat dissipation performance of the motor stator. This solves the problem that the dimensional tolerance of the hardware part 10 is often greater than that of the moving mold cavity 3, causing the inner ring of the hardware part 10 to be covered by plastic during the injection molding process. Finally, the molten plastic flows into the second groove 901 through the main runner 13 and the first vertical runner 14 in sequence. Since the first vertical runner 14 and the second groove 901 correspond one-to-one, it is beneficial for the molten plastic to quickly and evenly fill each corresponding second groove 901 through each first vertical runner 14, thereby effectively improving the molding efficiency and molding quality of the plastic part.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 the invention.

[0059] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A molding die for a rubber-coated stator plastic part, characterized in that, include: Moving mold shell (1); The moving mold core (2) is mounted on the moving mold shell (1); The moving mold cavity (3) is opened on the moving mold core (2). The moving mold cavity (3) is composed of a first annular groove (302) and a number of first grooves (301). The first grooves (301) are arranged in an array around the outer ring of the first annular groove (302), and the depth of the first grooves (301) is greater than the depth of the first annular groove (302). The hardware component (10) is composed of an integrally formed ring and several T-shaped blocks, with the T-shaped blocks arranged in an array around the outer ring of the ring. When the hardware component (10) is placed in the moving mold cavity (3), the outer side of the ring is spaced a certain distance from the outer side of the first annular groove (302); the two sides of the T-shaped blocks are spaced a certain distance from the sidewall of the first groove (301). Fixed mold shell (7); Fixed mold core (8), which is mounted on fixed mold shell (7); The fixed mold cavity (9) is formed on the fixed mold core (8). The fixed mold cavity (9) is composed of a second annular groove (902) and a number of second grooves (901). The second grooves (901) are arranged in an array around the outer ring of the second annular groove (902). The outer wall of the second annular groove (902) corresponds to the outer wall of the first annular groove (302). The width of the second annular groove (902) is smaller than the width of the first annular groove (302). The side of the fixed mold core (8) close to the moving mold core (2) is in contact with the annular surface. The moving mold core (2) is slidably fitted with a movable seat (4), and the movable seat (4) is provided with an inwardly contracting upper boss (401) at one end near the fixed mold shell (7), so that the moving mold core (2) and the upper boss (401) form the first annular groove (302). When the hardware (10) is fitted on the upper boss (401), the end of the hardware (10) near the fixed mold shell (7) protrudes from both the upper boss (401) and the moving mold core (2). The movable seat (4) is provided with an outwardly extending lower boss (402) at one end away from the fixed mold shell (7). The side of the lower boss (402) away from the upper boss (401) abuts against a second spring (6), so that the side of the lower boss (402) close to the upper boss (401) abuts against the moving mold core (2), and the other end of the second spring (6) abuts against the moving mold shell (1). The upper boss (401) has a protruding block (403) on its side, and the inner side of the corresponding ring of the hardware (10) has a limiting groove (1001) that matches the protruding block (403).

2. The molding die for a plastic-coated stator part according to claim 1, characterized in that: The movable seat (4) has a third groove (404) arranged on one side near the upper boss (401). A first spring (405) is fixedly connected to the bottom wall of the third groove (404). A push rod (406) is fixedly connected to the end of the first spring (405) away from the bottom wall of the third groove (404). When the push rod (406) retracts into the third groove (404), the restoring force of the second spring (6) is still greater than the restoring force of the first spring (405).

3. The molding die for a plastic-coated stator part according to claim 1, characterized in that: The fixed mold shell (7) is provided with a main channel (13) at the end away from the moving mold shell (1). One end of the main channel (13) is connected to the injection molding machine, and the other end of the main channel (13) is connected to a plurality of first vertical channels (14). The first vertical channels (14) are distributed in a ring array along the main channel (13). The first vertical channels (14) correspond one-to-one with the second groove (901), and the end of the first vertical channel (14) away from the main channel (13) extends through the fixed mold core (8) and then extends to the bottom wall of the second groove (901).

4. The molding die for a plastic-coated stator part according to claim 3, characterized in that: The moving mold shell (1) is provided with a plurality of second vertical flow channels (15) at one end away from the fixed mold shell (7). The second vertical flow channels (15) correspond one-to-one with the first groove (301). The end of the second vertical flow channel (15) near the first groove (301) is connected to a horizontal flow channel (16). Each horizontal flow channel (16) is provided with two tilting heads (17) at its end. One of them is tilted toward the first groove (301), and the other tilting head (17) is tilted toward the second groove (901).

5. The molding die for a plastic-coated stator part according to claim 1, characterized in that: The moving mold shell (1) and the fixed mold shell (7) are installed on a horizontal injection molding machine or a vertical injection molding machine; when installed on a vertical injection molding machine, the fixed mold shell (7) is located directly above the moving mold shell (1).

6. The molding die for a plastic-coated stator part according to claim 1, characterized in that: Cooling water pipes (19) are provided on both the moving mold shell (1) and the fixed mold shell (7).

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