Stator end face injection mold

Abstract

The utility model discloses a stator end face injection mold which comprises an upper module, a lower module and two lateral modules, the upper module comprises an upper mold plate and an injection molding pipe, a guide plate is arranged at the lower end of the injection molding pipe, and the lower module comprises a lower mold plate and an ejection seat; the lateral module comprises a control support, an upper heating module and a sliding block seat, an upper exhaust groove is formed in the inner side of the upper heating module, a lower exhaust groove is formed in the inner side of the sliding block seat, a heating device is arranged in the upper heating module, and the outer end of the upper heating module and the outer end of the sliding block seat are both connected with control oil cylinders. In the two lateral modules, piston rods of all the control oil cylinders push the two sets of upper heating modules and the two sets of sliding block bases respectively, so that the two upper heating modules and the two sets of sliding block bases abut against each other to form a pouring cavity in a surrounding mode, the positioning effect of the two lateral modules can be enhanced, the pouring effect on the two ends of a stator is good, and the production efficiency is improved. Bubbles in the stator groove body can be reduced, and the stator quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor stator processing technology, specifically to a stator end face injection mold for casting insulators into the two ends and slots of a motor stator. Background Technology

[0002] An electric motor is a device that converts electrical energy into kinetic energy. It is widely used in industrial production and daily life. An electric motor generally consists of two parts: a rotor and a stator. It is a device used to realize the conversion between electrical energy and mechanical energy. The stator core is a key component of the motor. In the traditional manufacturing of the stator core, insulating paper needs to be placed on the inner wall of the slot of the stator core, and the wires are placed inside the insulation. However, the traditional method leaves a gap between the wires and the slot, which affects the performance of the motor.

[0003] To address the problem of gaps between wires and slots caused by the use of insulating paper in traditional methods, Chinese invention patent application CN201710579454.2 discloses an epoxy resin casting process for the stator winding of an electric motor, comprising the following steps: (1) heating epoxy resin and curing agent separately and mixing them according to a ratio to form a casting liquid; (2) casting the obtained casting liquid into the stator winding, the casting liquid immersing between the enameled wires of the stator winding and in the gaps between the enameled wires and the stator core; (3) curing after casting. This invention uses an epoxy resin casting process to solve the insulation problem of the engine stator winding. The motor stator and the mold cooperate to form a casting space. The casting liquid is poured into the casting space, and after casting, it is cured, and the epoxy resin enters the space and cures with the motor stator to form a whole.

[0004] However, this casting method can easily cause air bubbles to form in the iron core's groove because the gas cannot be discharged in time, and it also cannot be used to cast the two ends of the iron core, affecting the quality of the motor. Utility Model Content

[0005] The purpose of this invention is to solve the technical problems of poor positioning effect of lateral modules and easy generation of air bubbles in the cast insulating material during the casting process in the prior art, and to provide a stator end face injection mold that has a good positioning effect of lateral modules and can reduce air bubbles in the stator slot.

[0006] To solve the above-mentioned technical problems, this utility model provides a stator end face injection mold, including an upper mold assembly, a lower mold assembly, and two side mold assemblies. The upper mold assembly includes an upper template and an injection tube, with a guide plate provided at the lower end of the injection tube. The lower mold assembly includes a lower template ejector seat and an ejector rod. The side mold assembly includes a control bracket, an upper heating module, and a slider seat. An upper venting groove is provided inside the upper heating module, and a lower venting groove is provided inside the slider seat. A heating device is provided inside the upper heating module. Control cylinders are connected to the outer ends of both the upper heating module and the slider seat. In the two side mold assemblies, the piston rods of all control cylinders push the two sets of upper heating modules and slider seats respectively, causing the two upper heating modules and slider seats to abut against each other and form a casting cavity. An inclined limiting groove is provided on the outer wall of the upper heating module. Multiple sets of symmetrically arranged clamping blocks are provided on the bottom surface of the upper template, and a pressing surface that cooperates with the inclined surface of the limiting groove is provided on the inner side of the clamping blocks.

[0007] As a further improvement of this utility model, the upper template includes an upper heat insulation plate, an upper locking film plate and an upper release template arranged in sequence, the injection molding tube passes through the upper heat insulation plate, the upper locking film plate and the upper release template in sequence, and the guide plate is arranged below the upper release template.

[0008] As a further improvement of this utility model, the guide plate includes multiple circumferentially arranged guide grooves, and each guide groove has a guide hole at its outer circumferential end.

[0009] As a further improvement of this utility model, the lower template includes a lower release template, a lower locking template, and a lower heat insulation plate arranged sequentially from top to bottom.

[0010] As a further improvement of this utility model, a pair of support plates are provided on the lower locking template, and multiple reinforcing plates are provided between the two support plates, with the control bracket fixed on the corresponding support plates.

[0011] As a further improvement of this utility model, protective plates are also provided on both sides of the lateral module in the direction of movement of the control cylinder.

[0012] As a further improvement of this utility model, multiple heating holes are provided on the side wall of the upper heating module, and the heating device is installed in the heating holes.

[0013] The beneficial effects of this utility model are as follows: 1. By setting up a casting cavity formed by an upper heating module, thermosetting resin can be directly injected into both ends of the motor stator. According to the space reserved in the casting cavity, all conductors at both ends of the iron core can be injected, improving the overall insulation effect of the motor stator; 2. By setting up a heating device, the thermosetting resin is kept in a softened state during the motor stator injection process. During injection, it can fully fill the entire cavity and the gaps within the groove, leaving no gaps after full injection; 3. By setting up upper and lower venting grooves, air in the cavity can be discharged in time, preventing excessive pressure in the cavity from affecting the injection; 4. By setting up clamping blocks, the position of the lateral module can be further fixed, providing good positioning and maintaining the shape within the cavity throughout the injection process, thus improving the quality of stator casting. Attached Figure Description

[0014] Figure 1 This is an overall schematic diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the upper module of this utility model.

[0016] Figure 3 This is a structural schematic diagram of the lower module and the side module of this utility model.

[0017] Figure 4 This is a cross-sectional schematic diagram of the lower module and the side module of this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the side module of this utility model.

[0019] Figure 6 This is an assembly diagram of the side module of this utility model.

[0020] Figure 7 This is a schematic diagram of the structure of the guide plate of this utility model.

[0021] Reference numerals: 1. Upper module; 11. Upper template; 111. Upper heat insulation plate; 112. Upper locking plate; 113. Upper release plate; 12. Injection tube; 13. Guide plate; 130. Guide hole; 131. Guide groove; 14. Clamping block; 141. Pressing surface; 2. Lower module; 21. Lower template; 211. Lower release plate; 212. Lower locking plate; 213. Lower heat insulation plate; 214. Support plate; 215. Reinforcing plate; 22. Ejector seat; 3. Side module; 300. Casting cavity; 31. Control bracket; 32. Upper heating module; 320. Upper venting groove; 321. Limiting groove; 322. Heating hole; 33. Slider seat; 330. Lower venting groove; 34. Control cylinder; 341. Piston rod; 4. Heating device; 5. Protective plate; 6. Motor stator. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] like Figure 1 The stator end face injection mold shown includes an upper mold group 1, a lower mold group 2 and two side mold groups 3. The motor stator insulation casting device of this embodiment includes an upper mold group 1 for injecting insulation material and controlling pressure; a lower mold group 2 for positioning and supporting the stator core; and two side mold groups 3 for forming a closed casting cavity and providing heating function.

[0024] like Figure 2 As shown, the upper module 1 includes an upper template 11 and an injection tube 12. A guide plate 13 is provided at the lower end of the injection tube 12. The upper template 11 includes an upper heat insulation plate 111, an upper locking film plate 112 and an upper release template 113 arranged in sequence. The injection tube 12 passes through the upper heat insulation plate 111, the upper locking film plate 112 and the upper release template 113 in sequence. The guide plate 13 is located below the upper release template 113.

[0025] In the upper module 1, the upper heat insulation plate 111 in the upper template 11 is made of ceramic composite material, which can prevent heat dissipation during injection; the upper locking plate 112 has a built-in hydraulic locking mechanism to provide stable mold closing pressure; the upper ejection plate 113 is equipped with an ejection mechanism to facilitate demolding and remove waste material from the guide plate 13.

[0026] like Figures 2 to 4 As shown, the bottom surface of the upper template 11 is provided with multiple sets of symmetrically arranged clamping blocks 14. The clamping blocks 14 are symmetrically distributed in two sets. An inclined limiting groove 321 is provided on the outer wall of the upper heating module 32. A pressing surface 141 that cooperates with the inclined surface of the limiting groove 321 is provided on the inner side of the clamping block 14. After the two upper heating modules 32 abut against each other, the upper template 11 moves downward so that the pressing surface 141 presses against the inclined surface of the limiting groove 321 to press the two upper heating modules 32 tightly. This prevents the cavity formed by the two upper heating modules 32 from deforming due to excessive pressure during the injection process, which would affect the quality of the injection.

[0027] In the two side modules 3, the piston rods 341 of all the control cylinders 34 push the two sets of upper heating modules 32 and slider seats 33 respectively, so that the two upper heating modules 32 and slider seats 33 abut against each other and surround to form the casting cavity 300.

[0028] like Figures 3 to 4 , Figure 7As shown, the lower module 2 includes a lower template 21, an ejector seat 22, and an ejector rod 23. The lower template 21 includes a lower stripping template 211, a lower locking template 212, and a lower heat insulation plate 213 arranged sequentially from top to bottom. By pushing the ejector rod 23 through the lower stripping template 211, the ejector seat 22 pushes out the cast motor stator 6.

[0029] A pair of support plates 214 are also provided on the lower locking template 212, and multiple reinforcing plates 215 are provided between the two support plates 214. The control bracket 31 is fixed on the corresponding support plate 214, so as to form a stable support frame and ensure that the stator core remains stable during the injection process.

[0030] The guide plate 13 adopts a circular structure matching the stator slot shape, including multiple radially arranged guide grooves 131. The number of radially arranged guide grooves 131 can be 6-16; in this embodiment, 8 are provided. Each radially arranged guide groove 131 has a guide hole 130 at its outer end. A circular guide groove 131 can also be provided outside the radially arranged guide grooves 131. The radial guide grooves 131 and the circular guide grooves 131 are connected downwards. The center position of the guide plate 13 is opposite to the lower end of the injection molding tube 12. The injection molding tube 12 penetrates three layers of template. Under the pressure of the hydraulic cylinder, the thermosetting resin in the injection molding tube 12 is squeezed to the center position of the guide plate 13, and then flows along the guide grooves 131 to the guide holes 130.

[0031] like Figure 1 , Figures 3 to 6 As shown, the side module 3 includes a control bracket 31, an upper heating module 32, and a slider seat 33. The upper heating module 32 has an upper venting groove 320 on its inner side, and the slider seat 33 has a lower venting groove 330 on its inner side. A heating device 4 is installed inside the upper heating module 32. Control cylinders 34 are connected to the outer ends of both the upper heating module 32 and the slider seat 33. The control cylinders 34 in the mold closing mechanism are servo hydraulic cylinders, which can provide strong pressure, allowing the upper heating module 32 and the slider seat 33 to press against each other, forming a stable cavity. Protective plates 5 are also provided on both sides of the side module 3 in the direction of movement of the control cylinders 34, further providing support and fixation.

[0032] like Figure 1 , Figures 3 to 6 As shown, the upper heating module 32 has multiple heating holes 322 on its side wall, and the heating device 4 is installed inside the heating holes 322.

[0033] The lower template 21 in the lower module 2 comprises a three-layer structure: a lower ejector template 211, a lower locking template 212, and a lower heat insulation plate 213. The lower ejector template 211 is equipped with a pneumatic ejection device; the lower heat insulation plate 213 can adopt a vacuum insulation design. A pair of support plates 214 are made of high-strength cast iron, and a reinforcing plate 215 is used to enhance the stability of the support plates 214. The upper heating module 32 in the side module 3 has four sets of independently temperature-controlled heating devices 4; the heating holes 322 are symmetrically distributed to improve heating uniformity.

[0034] The working process of this utility model is as follows: First, the side module 3 operates, opening the upper heating module 32 and the slider seat 33. The driving device located below the ejector seat 22 pushes the ejector seat 22 upward through the ejector rod 23, then places the motor stator 6 on the ejector seat 22. The driving device located below the ejector seat 22 then retracts the ejector seat 22 back to its original position. The control cylinder 34 pushes the two sets of upper heating modules 32 and slider seats 33 to close, clamping the motor stator 6. The protrusions on the inner ring of the slider seat 33 are used for support. The motor stator 6 is provided, and casting cavities 300 are formed at both ends of the motor stator 6. A guide plate 13 is placed above the motor stator 6. The heating device 4 is activated to heat the upper heating module 32 to a predetermined temperature. Then, the upper module 1 is moved downward, so that the upper release plate 113 of the upper module 1 presses the upper heating module 32 downward. The pressing surface 141 on the clamping block 14 cooperates with the inclined surface of the limiting groove 321 to further press the upper heating module 32 from both sides to prevent the upper heating module 32 from moving and form a locked state. Next, a thermosetting resin, such as epoxy resin, is placed into the injection tube 12. Through the squeezing action of the pressure device set above the injection tube 12, the thermosetting resin passes through the guide groove 131 on the guide plate 13 and then through the guide hole 130, and is injected into the casting cavity 300. Under the action of the heating device 4, the thermosetting resin can be softened, accelerating its flow in the tank, so that the thermosetting resin flows from one end of the stator core through the tank to the other end, and finally fills the entire cavity. During the injection process, the gas in the tank and the gas in the casting cavity 300 can be discharged in time through the upper vent groove 320 and the lower vent groove 330 to prevent the gas pressure in the casting cavity 300 from being too high and affecting the injection. After the injection is completed, the heating device 4 stops heating, the side module 3 works, the upper heating module 32 and the slider seat 33 are opened, the ejector seat 22 ejects the stator core 6 upward, the injected stator core 6 is taken out, the upper ejector plate 113 separates the guide plate 13, the waste material on the guide plate 13 is taken out, and then the next stator core 6 is injected, and so on.

[0035] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. A stator end face injection mold characterized by, The application relates to a two-way injection moulding machine, which comprises an upper moulding module (1), a lower moulding module (2) and two lateral moulding modules (3), wherein the upper moulding module (1) comprises an upper moulding plate (11) and an injection pipe (12), a flow guide plate (13) is arranged at the lower end of the injection pipe (12), the lower moulding module (2) comprises a lower moulding plate (21), an ejection seat (22) and an ejection rod (23), the lateral moulding module (3) comprises a control support (31), an upper heating module (32) and a slider seat (33), the inner side of the upper heating module (32) is provided with an upper exhaust groove (320), the inner side of the slider seat (33) is provided with a lower exhaust groove (330), the upper heating module (32) is internally provided with a heating device (4), and the outer ends of the upper heating module (32) and the slider seat (33) are connected with control oil cylinders (34). In the two lateral moulding modules (3), the piston rods (341) of all the control oil cylinders (34) respectively push two groups of upper heating modules (32) and slider seats (33), so that the two upper heating modules (32) and the slider seats (33) abut against each other and surround a pouring cavity (300). An inclined limiting groove (321) is arranged on the outer side wall of the upper heating module (32), a plurality of symmetrical clamping blocks (14) are arranged on the bottom surface of the upper moulding plate (11), and a pressing surface (141) matched with the inclined surface of the limiting groove (321) is arranged on the inner side of the clamping block (14). The upper moulding plate (11) comprises an upper heat insulation plate (111), an upper locking plate (112) and an upper demoulding plate (113) arranged in sequence, the injection pipe (12) penetrates through the upper heat insulation plate (111), the upper locking plate (112) and the upper demoulding plate (113) in sequence, and the flow guide plate (13) is arranged below the upper demoulding plate (113).

2. The stator end face injection mold of claim 1, wherein: The flow guide plate (13) comprises a plurality of circumferentially-arranged flow guide grooves (131), and the circumferential outer end of each flow guide groove (131) is provided with a flow guide hole (130).

3. A stator end face injection mold as set forth in claim 2, characterized in that: The lower moulding plate (21) comprises a lower demoulding plate (211), a lower locking plate (212) and a lower heat insulation plate (213) arranged in sequence from top to bottom.

4. The stator end face injection mold of claim 1, wherein: A pair of support plates (214) are further arranged on the lower locking plate (212), a plurality of reinforcing plates (215) are further arranged between the two support plates (214), and the control support (31) is fixed on the corresponding support plate (214).

5. A stator end face injection mold as defined in claim 4, wherein: Protection plates (5) are further arranged on the two sides of the lateral moulding module (3) in the moving direction of the control oil cylinder (34).

6. The stator end face injection mold of claim 1, wherein: A plurality of heating holes (322) are arranged on the side wall of the upper heating module (32), and the heating device (4) is arranged in the heating hole (322).

7. The stator end face injection mold of claim 1, wherein: ​

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