In-mold heating and bonding laminating stamping die for motor core and manufacturing process
By integrating stamping blanking, heating and gluing, lamination forming and cooling and shaping into a single high-speed stamping progressive die, the problems of process dispersion and automation in motor core manufacturing have been solved, and efficient, high-speed and automated production has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NINGBO JIANXIN PRECISION DIE CO LTD
- Filing Date
- 2026-04-22
- Publication Date
- 2026-05-29
AI Technical Summary
The existing manufacturing process for motor cores suffers from fragmented processes, low production efficiency, large equipment investment, high labor costs, and the need for external equipment for the heating and curing process, making it difficult to achieve high-speed automated production.
Using double-sided self-adhesive coated silicon steel strips, an in-mold heating and adhesive stacking high-speed stamping progressive die is used to integrate stamping blanking, heating and adhesive bonding, stacking and cooling. In-mold integrated manufacturing is achieved by using electric heating rods or high-frequency induction heating.
It enables efficient, high-speed, and automated production of motor cores. The adhesive coating is uniformly cured in the mold, resulting in good core integrity and high dimensional accuracy, thus reducing production costs and time.
Smart Images
Figure CN122099153A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of motor manufacturing technology, specifically relating to a motor core in-mold heating and adhesive lamination stamping die and its manufacturing process. Background Technology
[0002] The stator and rotor cores of an electric motor are its core components, typically made of multiple laminated silicon steel sheets. Traditional core manufacturing processes mainly include: stamping silicon steel sheets, deburring, laminating, and welding or riveting. This traditional process suffers from problems such as fragmented processes, low production efficiency, high equipment investment, and high labor costs.
[0003] With the development of motor manufacturing technology, a new type of material has emerged: a self-adhesive coating (such as epoxy adhesive) is applied to the surface of silicon steel sheets. Under heating and pressurization, the coating softens, flows, and cures, forming a strong bond between the sheets, thus eliminating the need for welding or riveting. However, in existing technologies, the heating and curing process is usually performed separately after stamping, requiring dedicated heating and pressurization equipment outside the mold. This results in a relatively long process flow and makes high-speed automated production difficult.
[0004] Currently, a high-speed progressive stamping die for automatic adhesive bonding and lamination of motor iron cores is disclosed. It includes an upper die, a lower die, and a guide plate. The upper die includes an upper die base, an upper backing plate, a punch backing plate, and a blanking punch. The lower die, from top to bottom, includes a blanking die, a blanking template, a blanking backing plate, a locking ring, and a lower die base. The blanking die is installed inside the blanking template. The locking ring is located below the blanking die and is axially locked to ensure the perpendicularity and parallelism between the blanking pieces. The blanking die is opposite to the locking hole. The inner diameter of the locking ring is smaller than the P-diameter of the blanking die. The locking ring holder is placed inside the lower die base. A product outlet is provided below the lower die base, and the lower end of the locking hole communicates with the product outlet. It also includes an adhesive bonding assembly, which includes a glue tank, an automatic glue dispenser, a hose, and a nozzle connected in sequence. The nozzle is installed inside the blanking punch, and the nozzle nozzle first penetrates the stamping surface of the blanking punch. This method requires spraying the self-adhesive coating after stamping, but it is inefficient and cannot achieve uniform spraying on the stamping. Excess glue can also affect the normal operation of the mold.
[0005] Another method for manufacturing motor cores involves stamping followed by concentrated heating and curing, but this method suffers from problems such as long heating time, high energy consumption, and easy deformation of the core. Other technologies employ resistance heating or induction heating, but the heating device is separated from the mold structure, failing to achieve true in-mold integrated molding.
[0006] Therefore, there is an urgent need to develop a high-speed progressive die that integrates stamping blanking, heating and gluing, and stacking forming inside the die to achieve efficient, high-quality, and automated manufacturing of motor stator and rotor cores. Summary of the Invention
[0007] The purpose of this invention is to provide a high-speed stamping progressive die for motor stator and rotor cores, which uses a silicon steel strip with adhesive coating on both sides to be fed into a progressive die, and integrates functions such as stamping blanking, heating and gluing, stacking and forming, and cooling and shaping into the die, so as to realize the integrated manufacturing of stator and rotor cores.
[0008] To achieve the above objectives, the present invention adopts the following technical solution: a high-speed stamping progressive die for heating and bonding layers of motor stator and rotor cores, comprising: The lower template serves as the basic support structure for the mold. A stator blanking die is set on the lower template and is used to blank the outer diameter of the stator core. A locking ring is provided inside the stator blanking die to accommodate and fix the stacked stator iron chips. A heating device is provided on the outside of the locking ring to heat the stator iron chip that enters the locking ring, so that the adhesive coating on the surface of the silicon steel strip melts rapidly at about 250°C and the two adjacent stator iron chips are bonded and fixed together. The cooling system, including cooling water channels and cooling water inlet and outlet pipes, is used to cool and shape the heated and solidified iron core laminate. A die fixing plate is used to fix the stator blanking die; The heating device is an electric heating rod or a high-frequency induction heating coil, and the high-frequency induction heating coil is electrically connected to the high-frequency induction heater.
[0009] The heating device includes a locking heat-conducting ring, a heating rod, a heat-conducting plate, and a first cooling water channel. The locking heat-conducting ring is located on the outer periphery of the stator core heating and stacking area to maintain the radial positioning of the stacked stator core and conduct heat. The heating rod is located on one side of the locking heat-conducting ring to provide the heat source required for stacking heating. The heat-conducting plate is located between the heating rod and the locking heat-conducting ring to uniformly transfer the heat generated by the heating rod to the locking heat-conducting ring. The first cooling water channel is located inside the lower template and surrounds the stator core heating and stacking area. The first cooling water channel is connected to a first cooling water inlet and outlet pipe to cool and shape the heated and stacked stator core. A power cord is also included, electrically connected to the heating rod, to supply power to the heating rod.
[0010] The heating device includes a locking ring, a high-frequency induction heating coil, a high-frequency induction heater, and a second cooling water channel. The locking ring is located on the outer periphery of the stator core heating and stacking area to maintain the radial positioning of the stacked stator core. The high-frequency induction heating coil is embedded in the locking ring and surrounds the stator core heating and stacking area to perform electromagnetic induction heating on the stacked stator core. The high-frequency induction heater is located on the outside of the lower template and electrically connected to the high-frequency induction heating coil via a connecting line to provide high-frequency alternating current to the high-frequency induction heating coil. The second cooling water channel is located inside the lower template and arranged around the stator core heating and stacking area. The second cooling water channel is connected to a second cooling water inlet and outlet pipe to cool and shape the heated and stacked stator core.
[0011] The present invention also includes a stator core stamping blanking area, which is disposed above the stator blanking die and is used to guide the stamped stator core into the locking ring.
[0012] Another object of the present invention is to provide a method for manufacturing an in-mold heated adhesive laminate of a motor stator and rotor core using the above-mentioned mold, comprising the following steps: S1: The silicon steel strip with adhesive coating on both sides is fed into the progressive die and passes through the blanking station in sequence: punching guide pin holes, punching iron core separation protrusions, punching stator slots, punching stator inner diameter, and punching stator outer diameter. S2: After the stator core outer diameter is stamped and blanked, the stator core blank enters the die cavity and falls into the locking ring; S3: Start the heating device to generate heat of about 220-280℃ through electric heating rods or high-frequency induction heating, so that the adhesive coating on the surface of the silicon steel strip can be quickly dissolved and the two adjacent stator iron chips can be bonded and fixed together; the heating and bonding process is completed. S4: When the core stack reaches the preset stack height or number of pieces, the core separation protrusion station in the mold layout is used to stamp a stator lamination with protrusions under the control of the stamping equipment. This causes the core in the mold locking ring to form multiple protrusions. The core stack is easily separated by taking advantage of the small adhesive area at the protrusions. S5: The solidified iron core stack is cooled and shaped by the cooling system to complete the stacking height control and manufacturing of a single stator iron core.
[0013] The heating temperature in step S3 is 250℃±10℃.
[0014] In step S4, the stator lamination with protrusions has a protrusion height of 0.1-0.3 mm and a number of 3-6 protrusions, which are evenly distributed on the outer circumference of the stator lamination.
[0015] Steps S2-S5 are completed continuously within the mold, realizing the integrated manufacturing of stator core through in-mold heating, adhesive curing, and layering.
[0016] Compared with the prior art, the present invention has the following beneficial effects and significant progress: 1. This invention integrates functions such as stamping blanking, heating and bonding, lamination forming, and cooling and shaping into a single progressive die. The silicon steel strip is continuously processed from feeding to output of the finished iron core, eliminating the need for inter-process transfer and secondary clamping. Compared with traditional multi-process decentralized production, efficiency is improved by more than 100%, and the high degree of integration enables high-speed automated production.
[0017] 2. As soon as the iron chip is dropped, it enters the heating zone. The adhesive coating dissolves rapidly and is evenly distributed within a temperature range of 220-280℃, and then cures quickly. This results in high inter-chip bonding strength, good overall integrity of the iron core, and more complete and uniform curing.
[0018] 3. This invention provides two heating methods: electric heating rod and high-frequency induction heating. The electric heating rod method has a simple structure and low cost, making it suitable for small to medium batch production; the high-frequency induction method has a fast heating speed, high thermal efficiency, and precise temperature control, and is non-contact heating, making it suitable for high-speed mass production and precision iron core manufacturing. Users can flexibly choose according to product characteristics and production scale.
[0019] 4. The mold features a built-in surrounding cooling water channel. After heating and curing, cooling water is immediately introduced to rapidly cool and solidify the iron core, effectively suppressing thermal deformation and ensuring the core's stacking coefficient and dimensional accuracy. The cooling and heating zones are arranged adjacently, resulting in a compact structure and high thermal circulation efficiency.
[0020] 5. A core separation protrusion station is set in the progressive nesting. When the stack reaches the set height, a stamped piece with protrusions is stamped. Taking advantage of the reduced adhesive area at the protrusions, the core stack can be easily separated within the locking ring without the need for an additional demolding mechanism. This simplifies the mold structure and ensures the quality of the core end face. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the stator core of the present invention.
[0022] Figure 2 This is a layout diagram of the stator core die stamping process of the present invention.
[0023] Figure 3 This is a schematic diagram of a high-speed stamping progressive die for the electric heating rod heating method of the present invention.
[0024] Figure 4 This is a schematic diagram of a high-speed stamping progressive die using the high-frequency induction heating method of the present invention. As shown in the figure: 1. Lower template; 2. Stator blanking die; 3. Die fixing plate; 4. Stator core stamping and blanking area; 5. Stator core heating and stacking area; 6. Locking heat-conducting ring; 7. Heating rod; 8. Heat-conducting plate; 9. First cooling water channel; 10. First cooling water inlet and outlet pipe; 11. Power cord; 12. Locking ring; 13. High-frequency induction heating ring; 14. High-frequency induction heater; 15. Second cooling water channel; 16. Second cooling water inlet and outlet pipe. Detailed Implementation
[0025] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are merely exemplary and do not limit the scope of protection of the present invention. Example
[0026] The present invention is a high-speed stamping progressive die using an electric heating rod, comprising a lower template 1, a stator blanking die 2, a locking ring, a heating device, and a die fixing plate 3.
[0027] The lower template 1 is made of high-strength alloy steel and serves as the basic support structure for the entire mold. The upper surface of the lower template 1 is machined with precision positioning grooves and mounting holes for fixing other functional modules.
[0028] The stator blanking die 2 is mounted on the die fixing plate 3 and is made of hard alloy or mold steel after heat treatment. The inner cavity shape matches the outer contour of the stator core and is used to blank the outer diameter of the stator core. A stator core stamping blanking area 4 is provided above the stator blanking die 2. The blanked stator core pieces are guided directly into the stator core heating and lamination area 5 below.
[0029] The locking heat-conducting ring 6 is located on the outer periphery of the stator core heating stacked area 5. It is made of copper alloy or aluminum alloy with excellent thermal conductivity. The inner wall maintains a gap of 0.02-0.05mm with the outer diameter of the stator core, which ensures the radial positioning of the stacked core and facilitates heat conduction. The outer wall of the locking heat-conducting ring 6 is machined with a flat surface that mates with the heat-conducting plate 8.
[0030] The heat-conducting plate 8 is disposed between the heating rod 7 and the locking heat-conducting ring 6. It is made of copper or aluminum plate with a high thermal conductivity and a thickness of 3-5mm. It is used to uniformly transfer the heat generated by the heating rod 7 to the locking heat-conducting ring 6, thereby heating the laminated iron core.
[0031] The first cooling water channel 9 is located inside the lower template 1 and surrounds the stator core heating and lamination area 5. It is formed into an annular channel by drilling, and the channel diameter is 8-12mm. The first cooling water channel 9 is connected to a first cooling water inlet and outlet pipe 10. The cooling water flow rate can be adjusted by a valve, which is used to quickly cool and shape the heated and solidified core lamination.
[0032] The die fixing plate 3 is made of medium carbon steel and is used to fix the stator blanking die 2 to ensure the positional accuracy of the die during the stamping process.
[0033] like Figure 2 As shown, the heating device in this embodiment includes a locking heat-conducting ring 6, a heating rod 7, a heat-conducting plate 8, and a first cooling water channel 9. The locking heat-conducting ring 6 is located on the outer periphery of the stator core heating stacked area 5, used to maintain the radial positioning of the stacked stator core and conduct heat. The heating rod 7 is located on one side of the locking heat-conducting ring 6, used to provide the heat source required for stacked heating. A stainless steel sheathed electric heating tube is used, and the power is selected within the range of 500W-2000W according to the core specifications. The heating rod 7 is connected to an external temperature control system through a power cord 11, which can realize precise temperature control and overheat protection.
[0034] The heat-conducting plate 8 is disposed between the heating rod 7 and the locking heat-conducting ring 6, and is used to uniformly transfer the heat generated by the heating rod 7 to the locking heat-conducting ring 6; the first cooling water channel 9 is disposed in the lower template 1 and arranged around the stator core heating and stacking area 5, and the first cooling water channel 9 is connected to the first cooling water inlet and outlet pipe 10, which is used to cool and shape the stator core after heating and stacking; and the power line 11 is electrically connected to the heating rod 7 and is used to supply power to the heating rod 7. Example
[0035] like Figure 4 As shown, this embodiment provides a high-speed stamping progressive die using high-frequency induction heating.
[0036] The difference from Embodiment 1 lies in the structure of the heating device: The heating device includes: a locking ring 12, a high-frequency induction heating ring 13, a high-frequency induction heater 4, and a second cooling water channel 15.
[0037] The high-frequency induction heating coil 13 is embedded in the locking ring 12 and surrounds the heating stacked area 5 of the stator core. The high-frequency induction heating coil 13 maintains a gap of 3-5mm with the stacked core, and generates eddy currents inside the iron chip through electromagnetic induction to achieve rapid and uniform heating.
[0038] The high-frequency induction heater 14 is disposed on the outside of the lower template 1 and is electrically connected to the high-frequency induction heating coil 13 via a connecting wire. The high-frequency induction heater 14 converts the industrial frequency AC power into a high-frequency alternating current of 10-100kHz, and the output power is adjustable within the range of 2-10kW. The frequency and power can be set according to the core material, stack thickness and heating speed requirements.
[0039] The second cooling water channel 15 is arranged inside the lower template 1 and around the stator core heating and stacking area 5. Its structure is similar to that of Embodiment 1, and it is connected to the second cooling water inlet and outlet pipe 16.
[0040] The advantages of the high-frequency induction heating method are: fast heating speed, the iron core can be heated to the set temperature within 30-60 seconds; heat is generated inside the iron core, and the coating is heated evenly; it is non-contact heating, with no mechanical wear; it is easy to achieve zoned temperature control, and is suitable for automated production. Example
[0041] Manufacturing method of in-mold heating adhesive laminate for motor stator core Using the mold described in Embodiment 1 or Embodiment 2, this embodiment provides a method for manufacturing a heated adhesive laminate in the mold of a motor stator core, comprising the following steps: Step S1: After uncoiling and leveling the silicon steel strip (typically 0.35mm or 0.5mm thick) with epoxy adhesive coating on both sides, feed it into the progressive die. The silicon steel strip passes through the following stations sequentially within the die: Punching guide pin holes: Punching guide pin holes at the edge of the strip for precise positioning in subsequent steps; Punching core separation protrusions: Punching protrusion forming holes at specific locations to prepare for subsequent separation; Punching stator slots: Punching out the slots of the stator core; Punching stator inner diameter: Punching out the inner circle of the stator core; Punching stator outer diameter blanking: Separating the stator core from the strip to complete blanking. These stations are arranged in a stepwise manner within the progressive die. Through repeated punching by the press slide, the strip advances gradually and completes each process sequentially.
[0042] Step S2: After the stator core outer diameter is punched and blanked, the stator laminations enter the stator blanking recess 2 under gravity or with air blowing assistance and fall into the locking ring (locking heat-conducting ring 6 or locking ring 12). The previous lamination falls to the bottom, and the next lamination is stacked on top, forming a layered structure. The inner diameter of the locking ring precisely matches the outer diameter of the core to ensure the coaxiality and perpendicularity of the stack. As the punching continues, laminations continuously fall in and stack, and the stack height gradually increases.
[0043] Step S3 When the stacking height reaches the set value or according to the production cycle, start the heating device: When using electric heating rods, the heating rod 7 is powered on and heats up, and the heat is conducted to the stacked iron core through the heat-conducting plate 8 and the locking heat-conducting ring 6. When using high-frequency induction heating, the high-frequency induction heater 14 is activated, and the high-frequency induction heating coil 13 generates an alternating magnetic field, inducing eddy currents and generating heat within the iron chip. The heating temperature is controlled within the range of 220-280℃, preferably 250℃±10℃. At this temperature, the epoxy adhesive coating on the surface of the silicon steel strip softens and flows rapidly, filling the gaps between the wafers, and is evenly distributed under pressure (either the weight of the iron chip itself or an external pressure device). The heating time is controlled within 1-2 minutes to ensure the coating fully cures and forms a strong chemical bond between the wafers. During the heating process, the temperature control system monitors the temperature in real time to prevent overheating that could lead to coating decomposition or demagnetization of the iron core.
[0044] Step S4: When the core stack reaches the preset stack height or number of sheets, the mold control system sends a signal. Under the control of the stamping equipment, a stator lamination with protrusions is stamped individually through the core separation protrusion station in the mold layout. The protrusions on this lamination are 0.1-0.3mm high, numbered 3-6, and evenly distributed on the outer circumference. After this protruding lamination is stacked, the protrusions disrupt the full contact between this lamination and adjacent laminations, significantly reducing the adhesive area at the protrusions. Utilizing this characteristic, the core stack can be easily separated within the locking ring through simple ejection or air blowing, without the need for a complex demolding mechanism. The separated individual core stack can be directly removed or automatically fed out of the mold.
[0045] Step S5: The separated iron core stack or the next stack still in the mold is rapidly cooled by the cooling system. Cooling water enters the cooling water channel through the first cooling water inlet / outlet pipe 10 or the second cooling water inlet / outlet pipe 16. The flow rate is adjusted according to the production cycle and temperature requirements, usually within the range of 10-30L / min.
[0046] Rapid cooling allows the adhesive coating to set quickly, ensuring the dimensional stability and mechanical strength of the iron core, while shortening the production cycle and improving mold utilization. The cooling water absorbs heat and is discharged, then cooled by an external heat exchanger and recycled.
[0047] The steps S2-S5 described above are completed continuously within the mold, achieving integrated manufacturing of the stator core through in-mold heating, adhesive curing, and lamination. The entire process is coordinated with the stamping cycle, enabling high-speed automated production. Example
[0048] For a stator core with an outer diameter of 120mm, an inner diameter of 80mm, and a stack thickness of 30mm, the mold of Example 2 and the method of this invention were used, and the optimized process parameters are as follows: silicon steel strip: 0.5mm thick, double-sided epoxy coating, coating thickness 2-3μm; stamping speed: 80 pieces / minute; heating method: high-frequency induction heating, frequency 20kHz, power 5kW; heating temperature: 250℃; heating time: 90 seconds; cooling water flow rate: 20L / min, cooling time: 60 seconds; bump setting: height 0.2mm, quantity 4, evenly distributed.
[0049] Testing revealed that the stator core produced has a stacking factor of over 0.98, an interlaminar bond shear strength of ≥2MPa, and an end face parallelism of ≤0.05mm, meeting the requirements for high-performance motors.
Claims
1. A stamping die for in-mold heating and adhesive lamination of motor core, characterized in that: include: The lower template (1) serves as the basic support structure for the mold; Stator blanking die (2) is set on the lower template and is used to blank the outer diameter of the stator core; A locking ring is provided inside the stator blanking die (2) to accommodate and fix the stacked stator iron chips; A heating device is provided on the outside of the locking ring to heat the stator iron chip that enters the locking ring, so that the adhesive coating on the surface of the silicon steel strip melts rapidly at about 250°C and the two adjacent stator iron chips are bonded and fixed together. The cooling system, including cooling water channels and cooling water inlet and outlet pipes, is used to cool and shape the heated and solidified iron core laminate. Die fixing plate (3) is used to fix the stator blanking die (2); The heating device is an electric heating rod or a high-frequency induction heating coil, and the high-frequency induction heating coil is electrically connected to the high-frequency induction heater.
2. The in-mold heating adhesive lamination stamping die for motor cores according to claim 1, characterized in that: The heating device includes a locking heat-conducting ring (6), a heating rod (7), a heat-conducting plate (8), and a first cooling water channel (9). The locking heat-conducting ring (6) is arranged around the outer periphery of the stator core heating stacking area (5) to maintain the radial positioning of the stacked stator core and conduct heat. The heating rod (7) is arranged on one side of the locking heat-conducting ring (6) to provide the heat source required for stacking heating. The heat-conducting plate (8) is arranged between the heating rod (7) and the locking heat-conducting ring (6) to uniformly transfer the heat generated by the heating rod (7) to the locking heat-conducting ring (6). The first cooling water channel (9) is arranged in the lower template (1) and surrounds the stator core heating stacking area (5). The first cooling water channel (9) is connected to a first cooling water inlet and outlet pipe (10) to cool and shape the stator core after heating and stacking. The power line (11) is electrically connected to the heating rod (7) to supply power to the heating rod (7).
3. The in-mold heating adhesive lamination stamping die for motor cores according to claim 1, characterized in that: The heating device includes a locking ring (12), a high-frequency induction heating ring (13), a high-frequency induction heater (14), and a second cooling water channel (15). The locking ring (12) is arranged around the outer periphery of the stator core heating stacking area (5) to maintain the radial positioning of the stacked stator core. The high-frequency induction heating ring (13) is embedded in the locking ring (12) and surrounds the stator core heating stacking area (5) to perform electromagnetic induction heating on the stacked stator core. The high-frequency induction heater (14) is arranged outside the lower template (1) and electrically connected to the high-frequency induction heating ring (13) through a connecting line to provide high-frequency alternating current to the high-frequency induction heating ring (13). The second cooling water channel (15) is arranged inside the lower template (1) and surrounds the stator core heating stacking area (5). The second cooling water channel (15) is connected to a second cooling water inlet / outlet pipe (16) to cool and shape the heated and stacked stator core.
4. The in-mold heating adhesive lamination stamping die for motor cores according to claim 1, characterized in that: It also includes a stator core stamping blanking area (4), which is located above the stator blanking die and is used to guide the stamped stator core into the locking ring.
5. A method for manufacturing an in-mold heated adhesive laminate for motor stator and rotor cores, using the stamping die for the in-mold heated adhesive laminate of motor cores as described in any one of claims 1-4, characterized in that, Includes the following steps: S1: The silicon steel strip with adhesive coating on both sides is fed into the progressive die and passes through the blanking station in sequence: punching guide pin holes, punching iron core separation protrusions, punching stator slots, punching stator inner diameter, and punching stator outer diameter. S2: After the stator core outer diameter is stamped and blanked, the stator core blank enters the die cavity and falls into the locking ring; S3: Start the heating device, which generates heat of about 220-280℃ through electric heating rods or high-frequency induction heating, so that the adhesive coating on the surface of the silicon steel strip can be quickly dissolved and the two adjacent stator iron chips can be bonded and fixed; the heating and bonding forming process is completed within 1-2 minutes. S4: When the core stack reaches the preset stack height or number of pieces, the core separation protrusion station in the mold layout is used to stamp a stator lamination with protrusions under the control of the stamping equipment. This causes the core in the mold locking ring to form multiple protrusions. The core stack is easily separated by taking advantage of the small adhesive area at the protrusions. S5: The solidified iron core stack is cooled and shaped by the cooling system to complete the stacking height control and manufacturing of a single stator iron core.
6. The manufacturing method of the in-mold heated adhesive laminate of the motor stator and rotor core according to claim 5, characterized in that: The heating temperature in step S3 is 250℃±10℃.
7. The manufacturing method of the in-mold heated adhesive laminate of the motor stator and rotor core according to claim 5, characterized in that: In step S4, the stator lamination with protrusions has a protrusion height of 0.1-0.3 mm and a number of 3-6 protrusions, which are evenly distributed on the outer circumference of the stator lamination.
8. The manufacturing method of the in-mold heated adhesive laminate of the motor stator and rotor core according to claim 5, characterized in that: Steps S2-S5 are completed continuously within the mold, realizing the integrated manufacturing of stator core through in-mold heating, adhesive curing, and layering.