A stator terminal embedding molding die

Abstract

This application discloses a stator terminal embedding molding die, belonging to the field of motor manufacturing technology. It mainly includes an upper mounting plate and a lower mounting plate, with the upper mounting plate installed on top of the lower mounting plate. Guide rods are installed at the four corners of the lower mounting plate, and the upper mounting plate is slidably mounted to the guide rods. It also includes a forming assembly installed on the upper and lower mounting plates, and a clamping assembly installed on the upper and lower mounting plates. This stator terminal embedding molding die uses a positioning pin on the lower mounting plate to horizontally limit the terminal, and the clamping plate on the upper mounting plate applies continuous pressure from the top under the action of a spring, forming a rigid constraint in the vertical direction, firmly fixing the terminal vertically. Simultaneously, the rubber pad at the lower end of the clamping plate increases friction to prevent terminal slippage and avoids damage to the terminal caused by rigid clamping.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing technology, specifically to a stator terminal embedding molding die. Background Technology

[0002] The stator is the stationary part of the motor, while the terminals are the metal contacts or terminals on the stator used for circuit connections. They are responsible for conducting current and connecting the internal windings of the motor to the external circuit. They are mostly made of copper or copper alloys, requiring good conductivity and a certain degree of mechanical strength. The terminals need to be tightly connected to the stator core or coils. The connection between the terminals and the stator requires injection molding using a mold to securely bond the terminals and stator together.

[0003] For example, patent CN218314848U discloses a stator terminal embedding molding die. This stator terminal embedding molding die includes a mold core, a first insert, a second insert, a cavity, and an ejector pin. This stator terminal embedding molding die can simultaneously embed multiple terminals with high positioning accuracy and high molding efficiency.

[0004] When the aforementioned patent is used, the terminal body is positioned and fixed by the positioning part through the positioning protrusion. However, the terminal body is only fixed by the protrusion. During the injection molding process, the molten plastic flows in the mold and fills the cavity, which will generate continuous lateral pressure on the terminal stator connection in the molding area. This pressure is not unidirectional and may fluctuate dynamically due to changes in the plastic flow path and filling speed. When the lateral force acts on the terminal stator connection, due to the limited limiting area on both sides of the protrusion and the lack of constraint in the vertical direction, the terminal stator connection is prone to displacement or tilting, thereby affecting the quality of stator terminal embedding molding.

[0005] Therefore, it is necessary to provide a stator terminal embedding mold to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a stator terminal embedding mold, which solves the problem that the terminal limit is insufficient during stator terminal embedding and that the terminal stator connection is prone to displacement or tilting during injection molding, thereby affecting the stator terminal embedding quality.

[0008] The technical solution adopted by this application to solve its technical problem is: a stator terminal embedding molding die, including an upper mounting plate and a lower mounting plate, wherein the upper mounting plate is installed on the upper end of the lower mounting plate, and guide rods are installed at the four corners of the lower mounting plate. The upper mounting plate is slidably installed with the guide rods, and further includes...

[0009] A molding assembly, which is mounted on the upper mounting plate and the lower mounting plate;

[0010] A clamping assembly is mounted on the upper mounting plate and the lower mounting plate. The clamping assembly includes a plurality of positioning pins mounted on the lower mounting plate. A clamping plate is provided on one side of the upper mounting plate. Two first limiting rods are mounted on one side of the upper mounting plate. The two sides of the clamping plate are slidably connected to the two first limiting rods respectively. Two springs are mounted on one side of the upper mounting plate. The lower ends of the two springs are fixedly connected to the clamping plate.

[0011] An ejector assembly is mounted on the lower mounting plate.

[0012] Furthermore, a rubber pad is installed at the lower end of the clamping plate, and the rubber pad is made of nitrile rubber.

[0013] Furthermore, the molding assembly includes an upper molding die and a lower molding die respectively mounted on an upper mounting plate and a lower mounting plate. A stator body is slidably mounted inside the lower molding die. A terminal body is mounted on the lead wire of the stator body. A locking block is installed inside the lower molding die, and the stator body is snapped onto the locking block.

[0014] Furthermore, a plurality of first molding grooves are provided on one side of the lower end of the upper molding mold, and a first through groove is provided on the upper molding mold for connecting each of the first molding grooves. An injection inlet is provided inside the first molding groove, and the injection inlet is connected to the first molding groove. A plurality of second molding grooves are provided on one side of the upper end of the lower molding mold, and a second through groove is provided on the lower molding mold for connecting the plurality of second molding grooves.

[0015] Furthermore, a first semi-circular sealing gasket and a second semi-circular sealing gasket are respectively installed on the lower end of the upper forming mold on both sides of the first forming groove, and a third semi-circular sealing gasket and a fourth semi-circular sealing gasket are respectively installed on the upper end of the lower forming mold on both sides of the second forming groove. When the upper forming mold and the lower forming mold are closed, the first semi-circular sealing gasket and the third semi-circular sealing gasket are tightly fitted together, and the second semi-circular sealing gasket and the fourth semi-circular sealing gasket are tightly fitted together.

[0016] Furthermore, the ejection assembly includes an ejector rod mounted on the lower mounting plate, the upper end of the ejector rod penetrating the lower mounting plate into the lower forming mold, a positioning plate being mounted in the middle of the ejector rod, and second limiting rods being mounted on both sides of the lower end of the positioning plate, both of the second limiting rods being slidably connected to the lower mounting plate.

[0017] Furthermore, a push rod is installed on one side of the upper end of the positioning plate, and the upper end of the push rod passes through the lower mounting plate and is then installed with the push plate.

[0018] The beneficial effects of this application are as follows: The stator terminal embedding molding die provided by this application can limit the horizontal direction of the terminal by the positioning pin set in the lower mounting plate, and apply continuous pressure from the top by the clamping plate of the upper mounting plate under the action of the spring to form a rigid constraint in the vertical direction, so that the terminal is firmly fixed in the vertical direction. At the same time, the rubber pad at the lower end of the clamping plate can increase the friction to prevent the terminal from sliding, and avoid damage to the terminal caused by rigid clamping.

[0019] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0021] In the attached diagram:

[0022] Figure 1 This is an overall schematic diagram of a stator terminal embedding molding die according to this application;

[0023] Figure 2 This is a bottom view schematic diagram of a stator terminal embedding molding die according to this application;

[0024] Figure 3 This is a top view schematic diagram of a stator terminal embedding molding die according to this application;

[0025] Figure 4 This is an exploded structural diagram of a stator terminal embedding molding die according to this application;

[0026] Figure 5 This is an exploded side view of a stator terminal embedding molding die according to this application.

[0027] Figure 6 This is an exploded bottom view of a stator terminal embedding molding die according to this application;

[0028] Figure 7 for Figure 4Enlarged view of point A in the middle;

[0029] Figure 8 for Figure 6 Enlarged view of point B in the middle.

[0030] The following are the labeling elements in the figure:

[0031] 1. Upper mounting plate; 2. Lower mounting plate; 3. Molding assembly; 31. Upper molding mold; 32. Lower molding mold; 33. Clamping block; 34. First molding groove; 35. Second molding groove; 36. First through groove; 37. Second through groove; 38. First semi-circular sealing gasket; 39. Second semi-circular sealing gasket; 310. Third semi-circular sealing gasket; 311. Fourth semi-circular sealing gasket; 312. Injection inlet; 4. Clamping assembly; 41. Positioning pin; 42. Clamping plate; 43. First limiting rod; 44. Spring; 45. Rubber pad; 5. Ejection assembly; 51. Ejector rod; 52. Positioning plate; 53. Push rod; 54. Push plate; 55. Second limiting rod; 6. Guide rod; 7. Stator body; 8. Terminal body. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0034] like Figure 1-4 As shown, this application provides a stator terminal embedding molding mold, including an upper mounting plate 1 and a lower mounting plate 2. The upper mounting plate 1 and the lower mounting plate 2 serve as the basic load-bearing structure of the mold and are made of high-strength alloy material. They can not only withstand the huge pressure when the mold is closed, but also effectively resist the high temperature effect during the injection molding process. The upper mounting plate 1 is located at the upper end of the lower mounting plate 2.

[0035] Guide rods 6 are fixedly installed at the four corners of the lower mounting plate 2. The upper mounting plate 1 is slidably installed with the guide rods 6. The surface of the guide rods 6 is ground and, together with the sliding bearing in the upper mounting plate 1, the verticality error of the upper mounting plate 1 when moving up and down is controlled within 0.02mm, ensuring the alignment accuracy of the upper forming mold 31 and the lower forming mold 32 when they are closed.

[0036] like Figure 7-8 As shown, a forming component 3 is provided on the upper mounting plate 1 and the lower mounting plate 2. The forming component 3 includes an upper forming mold 31 and a lower forming mold 32, which are respectively fixedly installed on the upper mounting plate 1 and the lower mounting plate 2. The upper forming mold 31 and the lower forming mold 32 are made of Cr12MoV mold steel and are quenched. They have excellent wear resistance and deformation resistance and can meet the needs of mass production.

[0037] The stator body 7 is slidably installed inside the lower forming mold 32. The terminal body 8 is fixedly installed on the lead wire of the stator body 7. The locking block 33 is fixedly installed inside the lower forming mold 32. The locking block 33 inside the lower forming mold 32 is made of elastic plastic material. When the stator body 7 is locked on the locking block 33, it can achieve stable positioning and avoid scratching the surface of the stator body 7.

[0038] The upper molding mold 31 has a plurality of first molding grooves 34 on one side of its lower end, and a first through groove 36 for connecting the first molding grooves 34 is provided on the upper molding mold 31. An injection inlet 312 is provided inside the first molding groove 34 and is connected to the first molding groove 34 for injecting molten plastic into the first molding groove 34. The lower molding mold 32 has a plurality of second molding grooves 35 on one side of its upper end, and a second through groove 37 for connecting the plurality of second molding grooves 35 is provided on the lower molding mold 32. When the upper molding mold 31 and the lower molding mold 32 are closed, the plurality of first molding grooves 34 and second molding grooves 35 form a channel for injection molding the connection between the stator lead and the terminal body 8.

[0039] The inner walls of both the first molding groove 34 and the second molding groove 35 are polished to reduce the resistance of the molten plastic during the flow process and ensure that the plastic can be evenly filled to the connection between the stator lead and the terminal body 8. The cross-section of the first through groove 36 and the second through groove 37 is an inverted trapezoidal structure, which can create a certain pressure gradient in the plastic during injection molding and ensure that the plastic filling density in each molding groove is consistent.

[0040] The lower end of the upper forming mold 31 is fixedly installed on both sides of the first forming groove 34 with a first semi-circular sealing gasket 38 and a second semi-circular sealing gasket 39 respectively. The upper end of the lower forming mold 32 is fixedly installed on both sides of the second forming groove 35 with a third semi-circular sealing gasket 310 and a fourth semi-circular sealing gasket 311 respectively. When the upper forming mold 31 and the lower forming mold 32 are closed, the first semi-circular sealing gasket 38 and the third semi-circular sealing gasket 310 fit tightly together to form a clamping channel for sealing and clamping the terminal body 8. The second semi-circular sealing gasket 39 and the fourth semi-circular sealing gasket 311 fit tightly together to form a clamping channel for sealing and clamping the stator body 7 lead wire.

[0041] The first semicircular sealing gasket 38, the second semicircular sealing gasket 39, the third semicircular sealing gasket 310, and the fourth semicircular sealing gasket 311 are all made of high and low temperature resistant silicone rubber, with a working temperature range of -60℃ to 200℃, fully adapting to the temperature environment during injection molding. The sealing gasket has a stepped cross-section, and a sealing flange is provided on the contact surface. When the mold is closed, the flange is compressed and undergoes elastic deformation, improving the sealing performance. The diameter of the clamping channel is 0.1-0.2mm larger than the diameter of the terminal body 8 and the stator body 7 leads, which can achieve tight clamping while avoiding excessive compression that could damage the terminals or leads.

[0042] like Figure 6-8 As shown, clamping components 4 are provided on the upper mounting plate 1 and the lower mounting plate 2. The clamping components 4 include multiple positioning pins 41 fixedly installed on one side of the upper end of the lower mounting plate 2. The positioning pins 41 are made of 45# steel and heat treated. Their tops are in the shape of bosses, which facilitates quick snap-fit ​​positioning of one end of the terminal body 8. The spacing of the positioning pins 41 is set according to the arrangement specifications of the terminals.

[0043] A clamping plate 42 is provided on one side of the lower end of the upper mounting plate 1. A rubber pad 45 is fixedly installed on the lower end of the clamping plate 42. A first limiting rod 43 is fixedly installed on both sides of the clamping plate 42 at the lower end of the upper mounting plate 1. The clamping plate 42 is slidably connected to the first limiting rod 43. Two springs 44 are fixedly installed on one side of the lower end of the upper mounting plate 1. The lower ends of the two springs 44 are fixedly installed to the clamping plate 42. When the upper mounting plate 1 and the lower mounting plate 2 are closed, the clamping plate 42 can clamp the terminal body 8 installed on the positioning pin 41 in the vertical direction to prevent the terminal body 8 from shaking during injection molding.

[0044] The clamping plate 42 maintains downward pressure under the action of the spring 44. The rubber pad 45 is made of nitrile rubber, which has good elasticity and wear resistance. It can not only firmly clamp the terminal, but also play a buffering role during the clamping process. The surface of the first limit rod 43 is chrome-plated, which reduces the friction when the clamping plate 42 slides, making the movement of the clamping plate 42 smoother.

[0045] like Figure 5 As shown, an ejection assembly 5 is provided on the lower mounting plate 2. The ejection assembly 5 is driven by an external drive mechanism. The ejection assembly 5 includes a push rod 51 that is slidably mounted on the lower mounting plate 2. The upper end of the push rod 51 passes through the lower mounting plate 2 and into the lower forming mold 32. The upper end of the push rod 51 is provided with an arc-shaped top, which facilitates the installation of the stator body 7 and avoids local damage to the stator body 7 during the ejection process.

[0046] A positioning plate 52 is fixedly installed in the middle of the top rod 51. A push rod 53 is fixedly installed on one side of the upper end of the positioning plate 52. The upper end of the push rod 53 passes through the lower mounting plate 2 and is fixedly installed with a push plate 54. The connection between the positioning plate 52 and the top rod 51 and the push rod 53 is made by welding. The weld strength has been strictly tested to ensure that the ejection assembly 5 will not loosen during long-term use. Second limit rods 55 are installed on both sides of the lower end of the positioning plate 52. Both second limit rods 55 are slidably connected to the lower mounting plate 2 and are used to limit the positioning plate 52, the top rod 51 and the push rod 53.

[0047] Working principle: First, the stator body 7 is slidably installed into the lower forming mold 32. The locking block 33 inside the lower forming mold 32 is used to achieve stable positioning of the stator body 7. At the same time, one end of the terminal body 8 on the lead wire of the stator body 7 is locked onto the positioning pin 41. The protruding top of the positioning pin 41 and the specific spacing ensure that the terminals are quickly positioned and arranged in a standardized manner.

[0048] The upper mounting plate 1 slides downward along the guide rod 6, causing the upper molding mold 31 to descend and close with the lower molding mold 32. During the closing process, the clamping plate 42 at the lower end of the upper mounting plate 1 is pressed downward by the spring 44, and the terminal body 8 is vertically clamped by the rubber pad 45 to prevent the terminal from shaking during injection molding.

[0049] After the mold closes, the first molding groove 34 and the second molding groove 35 form an injection channel, and the first through groove 36 and the second through groove 37 connect to each molding groove respectively. Molten plastic is injected through the injection inlet 312, diverted through the first through groove 36 to each of the first molding grooves 34, and then flows into the connected second molding groove 35. Due to the polishing treatment of the inner wall of the molding groove and the inverted trapezoidal structure of the through groove, the plastic flow resistance is small and the filling density is uniform, finally forming the required shape at the connection between the lead wire and the terminal body 8 of the stator body 7. At the same time, the semi-circular sealing gaskets of the upper and lower molds fit together to form a clamping channel, tightly clamping the lead wire and the terminal body 8 of the stator body 7, ensuring sealing and avoiding excessive compression damage.

[0050] After injection molding is completed, the upper mounting plate 1 drives the upper forming mold 31 to rise and reset. Then, the ejector assembly 5 is driven by the external drive mechanism, which drives the positioning plate 52 and the ejector rod 51 to move upward. The ejector rod 51 ejects the stator body 7 in the lower forming mold 32, completing the part removal.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stator terminal embedding molding die, comprising an upper mounting plate (1) and a lower mounting plate (2), wherein the upper mounting plate (1) is mounted on the upper end of the lower mounting plate (2), and guide rods (6) are mounted at each of the four corners of the lower mounting plate (2), and the upper mounting plate (1) and the guide rods (6) are slidably mounted, characterized in that: Also includes A molding component (3) is mounted on the upper mounting plate (1) and the lower mounting plate (2); A clamping assembly (4) is mounted on the upper mounting plate (1) and the lower mounting plate (2). The clamping assembly (4) includes a plurality of positioning pins (41) mounted on the lower mounting plate (2). A clamping plate (42) is provided on one side of the upper mounting plate (1). Two first limiting rods (43) are mounted on one side of the upper mounting plate (1). The two sides of the clamping plate (42) are slidably connected to the two first limiting rods (43) respectively. Two springs (44) are mounted on one side of the upper mounting plate (1). The lower ends of the two springs (44) are fixedly connected to the clamping plate (42). Ejector assembly (5) is mounted on the lower mounting plate (2).

2. The stator terminal embedding mold according to claim 1, characterized in that: A rubber pad (45) is installed at the lower end of the clamp (42), and the rubber pad (45) is made of nitrile rubber.

3. The stator terminal embedding mold according to claim 1, characterized in that: The molding assembly (3) includes an upper molding mold (31) and a lower molding mold (32) respectively mounted on an upper mounting plate (1) and a lower mounting plate (2). A stator body (7) is slidably mounted inside the lower molding mold (32). A terminal body (8) is mounted on the lead wire of the stator body (7). A locking block (33) is installed inside the lower molding mold (32). The stator body (7) is snapped onto the locking block (33).

4. The stator terminal embedding mold according to claim 3, characterized in that: The upper molding mold (31) has a plurality of first molding grooves (34) on one side of its lower end, and the upper molding mold (31) has a first through groove (36) for connecting each of the first molding grooves (34). The first molding groove (34) has an injection inlet (312) inside, and the injection inlet (312) is connected to the first molding groove (34). The lower molding mold (32) has a plurality of second molding grooves (35) on one side of its upper end, and the lower molding mold (32) has a second through groove (37) for connecting the plurality of second molding grooves (35).

5. A stator terminal embedding mold according to claim 4, characterized in that: The lower end of the upper forming mold (31) is provided with a first semi-circular sealing gasket (38) and a second semi-circular sealing gasket (39) on both sides of the first forming groove (34). The upper end of the lower forming mold (32) is provided with a third semi-circular sealing gasket (310) and a fourth semi-circular sealing gasket (311) on both sides of the second forming groove (35). When the upper forming mold (31) and the lower forming mold (32) are closed, the first semi-circular sealing gasket (38) and the third semi-circular sealing gasket (310) are tightly fitted together, and the second semi-circular sealing gasket (39) and the fourth semi-circular sealing gasket (311) are tightly fitted together.

6. The stator terminal embedding mold according to claim 1, characterized in that: The ejection assembly (5) includes an ejector rod (51) mounted on the lower mounting plate (2). The upper end of the ejector rod (51) passes through the lower mounting plate (2) and into the lower forming mold (32). A positioning plate (52) is mounted in the middle of the ejector rod (51). A second limiting rod (55) is mounted on both sides of the lower end of the positioning plate (52). Both second limiting rods (55) are slidably connected to the lower mounting plate (2).

7. A stator terminal embedding mold according to claim 6, characterized in that: A push rod (53) is installed on one side of the upper end of the positioning plate (52), and the upper end of the push rod (53) passes through the lower mounting plate (2) and is then installed with a push plate (54).

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