Forming die for rubber-coated stator plastic part

Abstract

The rubber-coated stator plastic part forming mold comprises a movable mold cavity and a fixed mold cavity, the movable mold cavity is formed in a movable mold core, the movable mold cavity is composed of a first annular groove and a plurality of first grooves, the first grooves are distributed around the outer ring of the first annular groove in an array mode, and the depth of the first grooves is larger than that of the first annular groove; the fixed mold cavity is formed in the fixed mold core, the fixed mold cavity is composed of a second annular groove and a plurality of second grooves, and the second grooves are distributed around the outer ring of the second annular groove in an array mode; 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 that of the first annular groove, and the face, close to the movable mold core, of the fixed mold core is attached to the surface of the circular ring. According to the invention, the plastic part insulating layer is obtained through direct injection molding of the hardware, the plastic part insulating layer can separate the hardware from the coil winding, and when the stator rotates at a high speed, the plastic part on the hardware does not generate a gap, and the risk of insulation failure does not exist.

Description

Technical Field

[0001] The invention relates to the technical field of rubber-coated stators, and in particular to a molding die for a plastic part of a rubber-coated stator. Background Art

[0002] The stator core structure of the motor usually includes hardware components and plastic insulation layers. The hardware components mainly include a circular ring part stamped from silicon steel sheets and a number of T-shaped blocks; the T-shaped blocks are distributed in a circular array around the circular ring part, that is, the T-shaped blocks are distributed around at intervals to form a number of placement slots for accommodating the stator winding. The placement slots must be covered with a plastic insulation layer to ensure electrical isolation between the stator winding and the stator core. Then, enameled copper wire is wound on the plastic insulation layer to form the stator winding, and the inner ring of the circular ring part is mounted on the rotating shaft. The inner ring area of ​​the circular ring must remain uncoated with plastic. At the same time, the corresponding circular ring part and T-shaped block that are wound with enameled wire must ensure that the plastic is filled completely without any missing parts.

[0003] At present, the plastic parts and hardware parts in the prior art are separate. T-shaped blocks are distributed in a circular array along the inner ring, and two plastic parts are embedded from both ends of the hardware through the gaps between the T-shaped blocks and abut against each other, thereby realizing the assembly of the plastic parts and the hardware parts. However, when the stator rotates at high speed, the plastic parts at both ends of the hardware may no longer be in close contact, resulting in gaps and the risk of insulation failure. In addition, since the plastic parts and hardware parts are separate, they need to be assembled during the production process, which increases the assembly process. Summary of the invention

[0004] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology and provide a molding die for a stator plastic part with an encapsulation.

[0005] A molding die for a plastic-coated stator plastic part, comprising: Moving mold shell; A movable mold core, wherein the movable mold core is installed on the movable mold shell; A movable mold cavity, wherein the movable mold cavity is opened on the movable mold core, and the movable mold cavity is composed of a first annular groove and a plurality of first grooves, wherein the first grooves are distributed in an array around the outer circle of the first annular groove, and the depth of the first grooves is greater than the depth of the first annular groove; The hardware is composed of an integrally formed circular ring and a plurality of T-shaped blocks, and the T-shaped blocks are arranged in an array around the outer ring of the circular ring; when the hardware is placed in the movable mold cavity, the outer side of the circular ring is spaced a certain distance from the outer side of the first annular groove; and the side surfaces of the T-shaped blocks are spaced a certain distance from the side walls of the first groove; Fixed mold shell; A fixed mold core, wherein the fixed mold core is installed on the fixed mold shell; The fixed mold cavity is opened on the fixed mold core, and the fixed mold cavity consists of a second annular groove and a plurality of second grooves, and the second grooves are distributed in an array around the outer circle 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, and the side of the fixed mold core close to the movable mold core is in contact with the surface of the circular ring.

[0006] A further solution is that a movable seat is slidably fitted on the movable mold core, and an inwardly contracted upper boss is provided at one end of the movable seat close to the fixed mold shell, so that the first annular groove is formed between the movable mold core and the upper boss; When the hardware is set on the upper boss, the end of the hardware close to the fixed mold shell protrudes from both the upper boss and the movable mold core; The movable seat is provided with a lower boss extending outward at one end away from the fixed mold shell, and a second spring is abutted against a side of the lower boss away from the upper boss so that a side of the lower boss close to the upper boss abuts against the movable mold core, and the other end of the second spring abuts against the movable mold shell.

[0007] A further solution is that a protruding block is arranged on the side of the upper boss, and a limiting groove matched with the protruding block is opened on the inner side of the circular ring corresponding to the hardware.

[0008] A further solution is that a third groove is formed in an array on one side of the movable seat close to the upper boss, a first spring is fixedly connected to the bottom wall of the third groove, and a push rod is fixedly connected to one end of the first spring away from the bottom wall of the third groove; when the push rod is retracted into the third groove, the restoring force of the second spring is still greater than the restoring force of the first spring.

[0009] A further solution is that a main flow channel is provided at one end of the fixed mold shell away from the movable mold shell, one end of the main flow channel is connected to the injection molding machine, and the other end of the main flow channel is connected to a plurality of first vertical flow channels, the first vertical flow channels are distributed along a circular array of the main flow channels, the first vertical flow channels correspond one-to-one to the second grooves, and one end of the first vertical flow channel away from the main flow channel passes through the fixed mold core and extends to the bottom wall of the second groove.

[0010] A further solution is that a plurality of second vertical flow channels are provided at one end of the movable mold shell away from the fixed mold shell, the second vertical flow channels correspond one-to-one to the first grooves, and the end of the second vertical flow channel close to the first groove is connected to a transverse flow channel, and two inclined heads are provided at the end of each of the transverse flow channels, one of which is inclined toward the first groove; and the other inclined head is inclined toward the second groove.

[0011] A further solution is that the movable 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 movable mold shell.

[0012] A further solution is that cooling water pipes are provided on both the movable mold shell and the fixed mold shell.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a stator plastic part molding mold with a rubber coating, through the mutual cooperation of the movable mold cavity and the fixed mold cavity, after the hardware is placed in the movable mold cavity, the first annular groove and the second annular groove will be connected to each other, so that the second plastic part can be formed during the injection molding process. Since the T-block corresponding to the hardware is spaced a certain distance from the side walls of the first groove on both sides; and the lower surface of the T-block is also kept a certain distance from the first groove; and the fixed mold core is provided with a second groove corresponding to the first groove, so that the first plastic part can be formed during the injection molding process, and the first plastic part and the second plastic part are molded into one body, so that the plastic part insulation layer can be obtained by direct injection molding on the hardware, and the plastic part insulation layer can separate the hardware from the coil winding, and when the stator rotates at high speed, the plastic part on the hardware will not have gaps, and there will be no risk of insulation failure. In addition, one end of the hardware close to the fixed mold core is arranged to protrude from both the upper boss and the movable mold core; thereby, during the mold closing process, the surface of the fixed mold core contacts and squeezes the hardware, and further compresses the second spring, which can ensure that the surface of the hardware is flush with the surface of the movable mold core, thereby ensuring that the inner ring of the hardware will not be connected to the annular groove during the injection molding process, and the inner ring of the hardware obtained by injection molding will not be covered by plastic, and will not affect the electrical performance and heat dissipation performance of the motor stator, thereby solving the problem that the dimensional tolerance of the hardware is often greater than the dimensional tolerance of the movable mold cavity, causing the inner ring of the hardware to be covered by plastic during the injection molding process; finally, the molten plastic flows into the second groove through the main flow channel and the first vertical flow channel in turn. Since the first vertical flow channel corresponds to the second groove one by one, it is beneficial for the molten plastic to be able to quickly and evenly pass through each first vertical flow channel and fill each corresponding second groove, thereby effectively improving the molding efficiency and molding quality of the plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic structural diagram of a movable mold shell and a fixed mold shell provided in an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the movable mold core and the fixed mold core provided by an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a fixed mold core provided by an embodiment of the present invention; Figure 4 is a schematic structural diagram of a movable mold shell provided in an embodiment of the present invention; Figure 5 The embodiment of the present invention provides Figure 4 A schematic diagram of the partially enlarged structure at center A; Figure 6 is a schematic structural diagram of a movable mold core provided by an embodiment of the present invention; Figure 7 The embodiment of the present invention provides Figure 6 A schematic diagram of the partially enlarged structure at B in the middle; Figure 8 The structure of the movable seat and the motor stator provided in the embodiment of the present invention is schematically shown. Figure 1 ; Fig. 9 The structure of the movable seat and the motor stator provided in the embodiment of the present invention is schematically shown. Figure 2 ; Fig.10 is a schematic diagram of the three-dimensional structure of the movable seat provided in an embodiment of the present invention; Fig.11 is a schematic cross-sectional structural diagram of a movable seat provided in an embodiment of the present invention; Fig.12 It is a structural schematic diagram of a glue injection pipeline provided in an embodiment of the present invention.

[0016] Figure numerals: 1. movable mold shell; 2. movable mold core; 3. movable mold cavity; 301. first groove; 302. first annular groove; 4. movable seat; 401. upper boss; 402. lower boss; 403. protruding block; 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 flow channel; 14. first vertical flow channel; 15. second vertical flow channel; 16. horizontal flow channel; 17. tilting head; 18. support rod; 19. cooling water pipe. DETAILED DESCRIPTION

[0017] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0019] See also Figure 1-Figure 12 The present invention provides a molding die for a plastic part of a stator with a coating, comprising: Moving mold shell 1; Fixed mold shell 7; wherein, the movable 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 movable mold shell 1.

[0020] A movable mold core 2, wherein the movable mold core 2 is installed in the middle of one end of the movable mold shell 1 close to the fixed mold shell 7; Moving mold cavity 3, such as Figure 4-Figure 7 As shown, the movable mold cavity 3 is opened on the movable mold core 2, and the movable mold cavity 3 consists of a first annular groove 302 and a plurality of first grooves 301. The first grooves 301 are distributed in an array around the outer circle 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.

[0021] Hardware 10, such as Figure 6 As shown, the hardware 10 is composed of an integrally formed circular ring and a plurality of T-shaped blocks. The circular ring and the T-shaped blocks are flush with each other, and the T-shaped blocks are distributed in an array around the outer ring of the circular ring. When the hardware 10 is placed in the movable mold cavity 3, as shown in FIG. Figure 7 As shown, the outer side of the circular ring is spaced a certain distance from the outer side of the first annular groove 302, that is, there is a gap between the outer side of the circular ring and the first annular groove 302; the two side surfaces of the T-shaped block are spaced a certain distance from the side wall of the first groove 301; the end of the T-shaped block away from the circular ring fits with the first groove 301. Since 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.

[0022] A fixed mold core 8, wherein the fixed mold core 8 is installed on the fixed mold shell 7; The fixed mold cavity 9 is opened on the fixed mold core 8. During the injection molding process, the fixed mold core 8 corresponds to the movable mold core 2, and the fixed mold cavity 9 corresponds to the movable mold cavity 3. Figure 3As shown, the fixed mold cavity 9 is composed of a second annular groove 902 and a plurality of second grooves 901, and the second grooves 901 are 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, the width of the second annular groove 902 is smaller than the width of the first annular groove 302, and the surface of the fixed mold core 8 close to the movable mold core 2 is in contact with the surface of the circular ring. Therefore, after the hardware 10 is placed in the movable mold cavity 3, the first annular groove 302 and the second annular groove 902 will be connected to each other, and the T-block of the hardware 10 will be separated from the circular ring, so as to form the second plastic part 12 during the injection molding process. Since the T-block is spaced a certain distance from the side walls of the first groove 301 on both sides, and the lower surface of the T-block is also spaced a certain distance from the first groove 301, and the fixed mold core 8 is provided with a second groove 901 corresponding to the first groove 301, a first plastic part 11 is formed during the injection molding process, and the first plastic part 11 and the second plastic part 12 are integrally formed with each other, thereby directly injecting the hardware 10 to obtain an insulating layer of the plastic part; therefore, when the stator rotates at high speed, the plastic part on the hardware 10 will not have gaps, and there will be no risk of insulation failure. In addition, since the plastic parts are obtained by direct injection molding, no assembly is required during the production process. Among them, the first plastic part 11 and the second plastic part 12 are as follows: Figure 8 and Fig. 9 shown.

[0023] It should be noted that, compared with the prior art, the hardware 10 of the present application is provided with a T-block on the outer ring of the circular ring, so that it is more convenient to wind the enameled copper wire on the hardware 10 after injection molding to form the stator winding.

[0024] It should be further explained that the hardware 10 is generally a purchased product, and its tolerance is not controlled. Its dimensional tolerance is often greater than the dimensional tolerance of the movable mold cavity 3 of the present application. When the hardware 10 is placed in the first annular groove 302, the upper surface of the circular ring portion corresponding to the hardware 10 may be a certain distance away from the upper surface of the movable mold core 2. At this time, after the movable mold core 2 and the fixed mold core 8 are molded together, the upper surface of the circular ring does not fit with the lower surface of the fixed mold core 8, so that the upper surface of the circular ring is also completely connected with the annular groove, so that during the injection molding process, the upper surface of the circular ring is also covered with plastic, that is, the inner ring of the hardware 10 is also covered with plastic, thereby affecting the electrical performance and heat dissipation performance of the motor stator.

[0025] Therefore, if Fig.10 and Fig.11 As shown, in this embodiment, the movable mold core 2 is slidably matched with a cylindrical movable seat 4, and an inwardly contracted upper boss 401 is provided at one end of the movable seat 4 close to the fixed mold shell 7, that is, the cross-sectional diameter of the upper boss 401 is smaller than the cross-sectional diameter of the movable seat 4, so that the first annular groove 302 is formed between the movable mold core 2 and the upper boss 401, as shown in FIG. Figure 5As shown. By providing an upper boss 401 on the movable seat 4, it is convenient for the hardware 10 to be injected to be sleeved on the movable seat 4, so that the movable seat 4 can drive the hardware 10 to move. When the hardware 10 is sleeved on the upper boss 401, the end of the hardware 10 close to the fixed mold shell 7 protrudes from both the upper boss 401 and the movable mold core 2. In addition, the end of the movable seat 4 away from the fixed mold shell 7 is provided with a lower boss 402 extending outward, and the side of the lower boss 402 away from the upper boss 401 is abutted against the second spring 6, so that the side of the lower boss 402 close to the upper boss 401 is abutted against the movable mold core 2, and the other end of the second spring 6 is installed in the sleeve 5, and the sleeve 5 is installed on the movable mold shell 1. Since the hardware 10 protrudes from both the upper boss 401 and the movable mold core 2; therefore, during the mold closing process, the surface of the fixed mold core 8 is in contact with the circular ring portion of the hardware 10, and the hardware 10 is squeezed until the surface of the hardware 10 is flush with the surface of the movable mold core 2, thereby ensuring that the inner ring (circular ring portion) of the hardware 10 will not be connected to the annular groove during the injection molding process, and the inner ring of the hardware 10 obtained by injection molding will not be covered by plastic, and will not affect the electrical performance and heat dissipation performance of the motor stator.

[0026] It should be noted that, during the mold closing process, after the surface of the hardware 10 moves down to be flush with the surface of the movable 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 .

[0027] Preferably, a protruding block 403 is provided on the side of the upper boss 401, and a limiting groove 1001 matching the protruding block 403 is provided on the inner side of the corresponding circular ring of the hardware 10. The protruding block 403 and the limiting groove 1001 cooperate with each other to position the hardware 10, thereby 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 adapted, and the two sides of the T-shaped block will not fit the side walls of the first groove 301 or the second groove 901.

[0028] For further information, please refer to Fig.11A third groove 404 is formed in an array on one side of the movable seat 4 close to the upper boss 401, and a first spring 405 is fixedly connected to the bottom wall of the third groove 404, and a push rod 406 is fixedly connected to one 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. It is understandable that in the initial state, the hardware 10 is sleeved on the upper boss 401. Under the action of the second spring 6, the lower boss 402 of the movable seat 4 is against the inside of the movable mold shell 1, and the ejector 406 extends out of the third groove 404. During the mold closing process, since the reset force of the second spring 6 is greater than the total reset force of all the first springs 405, the fixed mold core 8 first squeezes the ejector 406 back into the third groove 404, so that the side of the annular part of the hardware 10 close to the movable mold core 2 fits with the movable seat 4, avoiding the side of the inner ring of the hardware 10 close to the movable mold core 2 being covered by plastic during the injection molding process, and then the fixed mold core 8 continues to squeeze the hardware 10 until the surface of the hardware 10 is flush with the surface of the movable mold core 2. During the demolding process, after the fixed mold core 8 and the movable mold core 2 are separated from each other, under the action of the reset force of the first spring 405, the ejector 406 can push the injection-molded motor stator out of the movable mold cavity 3, which facilitates the demolding of the injection-molded motor stator.

[0029] See also Figure 2 and Fig.12 , the end of the fixed mold shell 7 away from the movable mold shell 1 is provided with a main flow channel 13, one end of the main flow channel 13 is connected to the injection molding machine, and the other end of the main flow channel 13 is connected to a plurality of first vertical flow channels 14, the first vertical flow channels 14 are distributed in a circular array along the main flow channel 13, and the main flow channel 13 is also provided with a support rod 18 for supporting the first vertical flow channels 14. The first vertical flow channels 14 correspond to the second grooves 901 one by one, and the end of the first vertical flow channel 14 away from the main flow channel 13 penetrates the fixed mold core 8 and extends to the bottom wall of the second groove 901. The molten plastic flows into the second groove 901 through the main flow channel 13 and the first vertical flow channel 14 in turn, and can fill the fixed mold cavity 9 and the movable mold cavity 3 in turn; after the plastic is cooled, the first plastic part 11 and the second plastic part 12 formed in one piece can be obtained. Since the first vertical flow channels 14 correspond to the second grooves 901 one by one, the molten plastic can quickly and evenly pass through each first vertical flow channel 14 and fill each corresponding second groove 901, thereby effectively improving the molding efficiency and molding quality of the plastic part.

[0030] Furthermore, a plurality of second vertical flow channels 15 are provided at one end of the movable mold shell 1 away from the fixed mold shell 7, and the second vertical flow channels 15 correspond one-to-one to the first groove 301. The second vertical flow channels 15 are connected to the end of the first groove 301 close to the first groove 301 with a transverse flow channel 16, and two inclined heads 17 are provided at the end of each of the transverse flow channels 16. The two inclined heads 17 are symmetrically arranged along the central axis of the transverse flow channel 16, one of which is inclined toward the first groove 301; the other inclined head 17 is inclined toward the second groove 901; in order to avoid interference between the transverse flow channel 16 and the inclined head 17 and the fixed mold core 8, a groove adapted to the transverse flow channel 16 and the inclined head 17 is opened on the fixed mold core 8, and after the movable mold shell 1 and the fixed mold shell 7 are molded, the transverse flow channel 16 and the inclined head 17 protruding from the movable mold core 2 are accommodated in the groove. The second vertical flow channel 15 and the transverse flow channel 16 can also be used for injection of glue. Since the two inclined heads 17 on the transverse flow channel 16 are symmetrically arranged, they are used to inject glue into the first groove 301 and the second groove 901 respectively, so that the molten plastic can be well filled into various positions in the mold cavity, further improving the molding efficiency and molding quality of the plastic part. At this time, in order to facilitate the exhaust of the mold cavity, an exhaust groove connected to the outside world can be opened on the movable mold core 2 or the fixed mold core 8.

[0031] In some embodiments, the transverse flow channel 16 and the second vertical flow channel 15 can also be used for exhaust. Since the inclined head 17 on the transverse flow channel 16 corresponds one-to-one with the first groove 301 and the second groove 901, during the process of injecting glue through the first vertical flow channel 14, the air pressure in the mold cavity can be quickly released through the transverse flow channel 16 and the second vertical flow channel 15, which can also improve the molding efficiency and molding quality of plastic parts.

[0032] The movable mold shell 1 and the fixed mold shell 7 are both provided with cooling water pipes 19, through which the fixed mold core 8 and the movable mold core 2 can be cooled conveniently, which is beneficial to the rapid cooling and molding of the motor stator.

[0033] In summary, the present invention provides a stator plastic part molding mold with encapsulated plastic. Through the mutual cooperation of the movable mold cavity 3 and the fixed mold cavity 9, after the hardware 10 is placed in the movable mold cavity 3, the first annular groove 302 and the second annular groove 902 will be connected to each other, so that the second plastic part 12 can be formed during the injection molding process. Since the T-block corresponding to the hardware is spaced a certain distance from the side walls of the first groove 301 on both sides; and the lower surface of the T-block is also kept a certain distance from the first groove 301; and the fixed mold core 8 is provided with a second groove 901 corresponding to the first groove 301, the first plastic part 11 can be formed during the injection molding process, and the first plastic part 11 and the second plastic part 12 are formed into one body, so that the plastic part insulation layer is directly injected on the hardware 10, and the plastic part insulation layer can separate the hardware 10 from the coil winding, and when the stator rotates at high speed, the plastic part on the hardware 10 will not have gaps, and there will be no risk of insulation failure. In addition, the end of the hardware 10 close to the fixed mold core 8 is arranged to protrude from both the upper boss 401 and the movable mold core 2; so that during the mold closing process, the surface of the fixed mold core 8 contacts the hardware 10 and squeezes the hardware 10, and further compresses the second spring 6, which can ensure that the surface of the hardware 10 is flush with the surface of the movable mold core 2, thereby ensuring that the inner ring of the hardware 10 will not be connected to the annular groove during the injection molding process, and the inner ring of the hardware 10 obtained by injection molding will not be covered by plastic, and will not affect the electrical performance and heat dissipation performance of the motor stator. , thereby solving the problem that the inner circle of the hardware 10 is also covered by plastic during the injection molding process because the dimensional tolerance of the hardware 10 is often greater than the dimensional tolerance of the movable mold cavity 3; finally, the molten plastic flows into the second groove 901 through the main flow channel 13 and the first vertical flow channel 14 in sequence. Since the first vertical flow channel 14 corresponds to the second groove 901 one by one, it is beneficial for the molten plastic to be able to quickly and evenly pass through each first vertical flow channel 14 and fill each corresponding second groove 901, thereby effectively improving the molding efficiency and molding quality of plastic parts.

[0034] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0036] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The phrase appearing in various positions in the specification is not necessarily the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purpose of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A mold for forming a plastic part of a stator, characterized in that: include: Moving mold shell (1); A movable mold core (2), wherein the movable mold core (2) is mounted on the movable mold shell (1); A movable mold cavity (3), wherein the movable mold cavity (3) is formed on the movable mold core (2), and the movable mold cavity (3) is composed of a first annular groove (302) and a plurality of first grooves (301), wherein the first grooves (301) are arranged in an array around the outer circle 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); A hardware component (10), the hardware component (10) comprising an integrally formed circular ring and a plurality of T-shaped blocks, the T-shaped blocks being arranged in an array around the outer ring of the circular ring; when the hardware component (10) is placed in the movable mold cavity (3), the outer side of the circular ring is spaced a certain distance from the outer side of the first annular groove (302); and the side surfaces of the T-shaped blocks are spaced a certain distance from the side walls of the first groove (301); Fixed mold shell (7); A fixed mold core (8), wherein the fixed mold core (8) is mounted on the fixed mold shell (7); A fixed mold cavity (9), wherein the fixed mold cavity (9) is opened on the fixed mold core (8), and the fixed mold cavity (9) is composed of a second annular groove (902) and a plurality of second grooves (901), and the second grooves (901) are arranged in an array around the outer circle 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), and a side of the fixed mold core (8) close to the movable mold core (2) is in contact with the surface of the annular ring.

2. The mold for forming a plastic part of a stator with encapsulation according to claim 1, characterized in that: A movable seat (4) is slidably fitted on the movable mold core (2), and an inwardly contracted upper boss (401) is provided at one end of the movable seat (4) close to the fixed mold shell (7), so that the first annular groove (302) is formed between the movable mold core (2) and the upper boss (401); When the hardware (10) is sleeved on the upper boss (401), one end of the hardware (10) close to the fixed mold shell (7) protrudes from both the upper boss (401) and the movable mold core (2); A lower boss (402) extending outward is provided at one end of the movable seat (4) away from the fixed mold shell (7), and a second spring (6) is abutted against a side of the lower boss (402) away from the upper boss (401), so that a side of the lower boss (402) close to the upper boss (401) abuts against the movable mold core (2), and the other end of the second spring (6) abuts against the movable mold shell (1).

3. The mold for forming a plastic part of a stator with encapsulation according to claim 2, characterized in that: A protruding block (403) is provided on the side of the upper boss (401), and a limiting groove (1001) matching the protruding block (403) is provided on the inner side of the circular ring corresponding to the hardware (10).

4. The mold for forming a plastic part of a stator with encapsulation according to claim 3, characterized in that: A third groove (404) is formed in an array on one side of the movable seat (4) close to the upper boss (401); a first spring (405) is fixedly connected to the bottom wall of the third groove (404); and a push rod (406) is fixedly connected to one end of the first spring (405) away from the bottom wall of the third groove (404); when the push rod (406) is retracted 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).

5. The mold for forming a plastic part of a stator with encapsulation according to claim 1, characterized in that: A main flow channel (13) is provided at one end of the fixed mold shell (7) away from the movable mold shell (1), one end of the main flow channel (13) is connected to the injection molding machine, and the other end of the main flow channel (13) is connected to a plurality of first vertical flow channels (14), the first vertical flow channels (14) are distributed in a circular array along the main flow channel (13), the first vertical flow channels (14) correspond to the second grooves (901) one by one, and one end of the first vertical flow channel (14) away from the main flow channel (13) passes through the fixed mold core (8) and then extends to the bottom wall of the second groove (901).

6. The mold for forming a plastic part of a stator with encapsulation according to claim 5, characterized in that: A plurality of second vertical flow channels (15) are arranged at one end of the movable mold shell (1) away from the fixed mold shell (7), and the second vertical flow channels (15) correspond to the first grooves (301) one by one. One end of the second vertical flow channel (15) close to the first groove (301) is connected to a transverse flow channel (16), and two inclined heads (17) are arranged at the end of each transverse flow channel (16), one of which is inclined toward the first groove (301); and the other inclined head (17) is inclined toward the second groove (901).

7. The mold for forming a plastic part of a stator with encapsulation according to claim 1, characterized in that: The movable 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 movable mold shell (1).

8. The mold for forming a plastic part of a stator with encapsulation according to claim 1, characterized in that: The movable mold shell (1) and the fixed mold shell (7) are both provided with cooling water pipes (19).

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