Rotor iron core high-pressure die-casting die

Abstract

The invention discloses a rotor iron core high-pressure die-casting die, and belongs to the technical field of rotor iron core manufacturing equipment, the rotor iron core high-pressure die-casting die comprises a movable die and a fixed die, the movable die comprises a die foot, a movable die base plate, a movable die plate, a height adjusting plate, a positioning bush B fixing plate, a positioning bush B, a positioning bush A fixing plate, a positioning bush A, a sliding block guide plate and a sliding block, a movable mold core is arranged on the movable mold plate, the fixed mold comprises a fixed mold base plate, a fixed mold plate, a feeding pipe, an oil cylinder, an upper ejector pin and an upper ejector pin panel, a fixed mold core is arranged on the fixed mold plate, a fixed mold core inner positioning ring, a fixed mold core outer positioning ring and a flow dividing block are arranged on the fixed mold core, and a main runner, a side runner, a flow dividing runner and an inner runner are arranged on the fixed mold core. According to the invention, the flow velocity of the metal solution cast into the rotor core can be the same, bubbles can be prevented from being generated, the production efficiency of the rotor can be improved, and the product quality of the rotor core can also be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of rotor core manufacturing equipment, and relates to a mold, specifically to a high-pressure die-casting mold for rotor cores for casting aluminum or aluminum alloy in rotor cores. Background Art

[0002] In the manufacturing process of traditional rotor cores, aluminum materials need to be cast at both ends and in the slots of the rotor core. However, bubbles often occur in the cast materials, affecting the quality of the products.

[0003] In the prior art, a utility model with an application date of July 24, 2018 and an application number of 201821170213.9 discloses a new type of injection mold for rotor cores, including an upper mold and a lower mold. The lower end surface of the upper mold is connected to the upper end surface of the lower mold; the upper mold includes a hot runner, a heating coil, a main nozzle and a sub-nozzle; the hot runner is arranged inside the upper mold, the heating coil is evenly wound around the surface of the hot runner, and the heating coil connector extends outside the hot runner; the main nozzle and the sub-nozzle are evenly arranged at the bottom of the hot runner, and the nozzle ports of the main nozzle and the sub-nozzle extend out of the lower end surface of the upper mold. This patent sets two heat-conducting nozzles, reducing the use of heating coils and wiring. The nozzles are combined from single-point injection to two-point injection, reducing the number of nozzles and being easy to form and process, saving manufacturing costs and processing time.

[0004] An invention patent with an application date of December 25, 2023 and an application number of 202311786357.2 discloses a die-casting mold with a quickly replaceable mold core, including a fixed mold and a moving mold. A fixed mold core is detachably arranged at the upper end of the fixed mold, and a moving mold core is detachably arranged at the lower end of the moving mold. The fixed mold core and the moving mold core can be positioned and matched through a positioning component. Lifting plates for easy movement are arranged on both sides of the fixed mold core. At the four-week opposite ends of the upper end of the fixed mold, a pair of limit platforms and a pair of limit components are respectively arranged. The limit component includes two limit plates that can move away from or towards each other, and the limit plates can abut against the fixed mold core. The fixed mold core and the moving mold core are positioned and matched through the positioning component, then the two sides of the fixed mold core are aligned between the two limit platforms on the fixed mold, and thus the fixed mold core is accurately placed on the fixed mold by cooperating with the limit plates. The moving mold moves to the moving mold core, and then the fixed mold core and the moving mold core can be directly installed.

[0005] A utility model patent with an application date of November 24, 2021 and an application number of 202122891241.8 discloses a casting mold for a rotor core to improve the exhaust effect, including a casting upper mold and a casting lower mold adapted to the rotor; a feeding hole and a pouring port are provided on the casting upper mold, and the feeding hole and the pouring port correspond to the rotor slots of the rotor; several exhaust structures are provided on the casting lower mold; an exhaust mesh is provided on the exhaust structure; an end ring groove is also provided on the casting lower mold; a rotor limiting step is provided on the casting upper mold; the diameter dimension of the rotor is D; the diameter dimension of the rotor limiting step is greater than or equal to the diameter of the rotor; the diameter of the pouring port is Y. Through the arrangement of the exhaust structure, the gas generated during the rotor casting is discharged to the outside of the mold through the exhaust structure, thereby improving the casting quality; through the arrangement of the exhaust mesh on the exhaust structure, the gas is discharged to the outer exhaust hole through the exhaust mesh, and the exhaust mesh plays a role in blocking the molten aluminum during casting, thus facilitating casting.

[0006] However, in the above prior art during the die-casting process, the flow rate of the molten metal solution is different in different cavities, and even backflow phenomena may occur in some cavities, which easily causes bubbles to appear in the cavities, affecting the distribution of the metal material in the cavities and the quality of the product. Summary of the Invention

[0007] The purpose of the present invention is to overcome the technical problems in the prior art that during the die-casting process, the flow rate of the metal material is different in different cavities, which easily causes bubbles to appear in the cavities and affects the distribution of the metal material in the cavities, and to provide a high-pressure die-casting mold for a rotor core that can make the flow rate of the metal material in the cavities basically the same, prevent bubbles from generating at both ends of the rotor and in the cavities, and improve the product quality.

[0008] To solve the above technical problems, the present invention provides a high-pressure die-casting mold for a rotor core, including a moving die and a fixed die. The moving die includes a die foot, a moving die substrate, a moving die plate, a height adjustment plate, a positioning bushing B fixing plate, a positioning bushing B, a positioning bushing A fixing plate, a positioning bushing A, a slider guide plate and a slider arranged in sequence. A moving die core is provided on the moving die plate, a positioning bushing B is provided in the positioning bushing B fixing plate, and a positioning bushing A is provided in the positioning bushing A fixing plate.

[0009] The fixed mold described above includes a fixed mold substrate and a fixed mold plate. On the fixed mold substrate, there are a feeding pipe corresponding to the feeding port, an oil cylinder for extrusion, an upper ejector pin, and an upper ejector pin panel. On the fixed mold plate, there is a fixed mold core. In the middle of the fixed mold core, there is an inner positioning ring of the fixed mold core. Around the fixed mold core, there is an outer positioning ring of the fixed mold core. Between the inner positioning ring and the outer positioning ring of the fixed mold core, there are several shunt blocks. On one side of the fixed mold core, there is a main runner. Between the inner positioning ring of the fixed mold core and the shunt blocks, there is an inner runner. Between the shunt blocks and the outer positioning ring of the fixed mold core, there is a side runner. The shunt blocks are arranged in a circular pattern and include a left shunt block and a right shunt block. Between adjacent shunt blocks, there is a shunt channel that connects the side runner and the inner runner. On the inner runner of the fixed mold core, there are also upper ejector pin holes corresponding to the upper ejector pins. The upper ejector pin holes are distributed in a circular ring pattern. Inside the fixed mold core, there is a cooling water flow channel for the flow of cooling water. The cooling water flow channel has a water inlet and a water outlet.

[0010] As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, a first shunt block is provided inside the main runner. The first shunt block divides the side runner into a left side runner and a right side runner, and divides the shunt blocks into a left shunt block and a right shunt block. The outer side walls of the left side runner and the right side runner are respectively provided with an outer arc of the left side runner and an outer arc of the right side runner. The outer arcs of the left side runner and the right side runner are set as eccentric arcs. The widths of the left side runner and the right side runner gradually decrease from the side close to the main runner to the side far from the main runner. The left shunt block and the right shunt block include the first shunt block, the second shunt block, the third shunt block, the fourth shunt block, and the fifth shunt block arranged in sequence starting from the first shunt block. The second shunt block is provided in two. The widths of the shunt channels between the second shunt blocks are the same. One side of the third shunt block adjacent to the side runner is provided with an inclined surface. The width of the shunt channel between the third shunt blocks near the side runner is greater than the width near the inner runner. One side of the fifth shunt block adjacent to the side runner is provided with an inclined surface. The width of the shunt channel between the fifth shunt blocks near the side runner is greater than the width near the inner runner. The openings where the shunt channel communicates with the left side runner and the openings where the shunt channel communicates with the right side runner gradually increase in width from the first shunt block to the fourth shunt block. As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, a left side runner return part and a right side runner return part are provided at the ends of the left side runner and the right side runner far from the main runner.

[0011] As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, the widths of the places where the shunt channels communicate with the inner runner are all the same, ensuring that the flow velocity and pressure of the molten metal solution entering the runner holes are the same, ensuring uniform casting and ensuring product quality.

[0012] As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, a moving die base insert is provided on the moving template, the moving die core is arranged on the moving die base insert, and a first lower ejector pin hole through which the lower ejector pin can pass is provided in the moving die base insert and the moving die core.

[0013] As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, the slider provided above the positioning bushing A fixing plate includes a first slider and a second slider. The first slider and the second slider are arranged oppositely, and the outer sides of the first slider and the second slider are connected to a driving component, and the driving component drives the first slider and the second slider to slide relatively along the slider guide plate.

[0014] As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, a cooling block is provided on the fixed die base, a first cooling pipeline for the circulation of cooling water is provided in the cooling block, a second cooling pipeline for the circulation of cooling water is provided in the fixed die core, and a third cooling pipeline for the circulation of cooling water is provided inside the moving die core.

[0015] As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, a lower ejector pin bottom plate is provided on the mold foot, a lower ejector pin panel is provided on the lower ejector pin bottom plate, a third lower ejector pin hole is provided on the lower ejector pin panel, a lower ejector pin is fixedly provided on the lower ejector pin bottom plate, and the lower ejector pin passes through the third lower ejector pin hole.

[0016] As a further improvement measure of the present invention, in the above-mentioned high-pressure die-casting mold for a rotor core, a first positioning guide pin hole through which the first positioning guide pin can pass is respectively provided on the moving die base, the moving template, the fixed die base, the fixed template, the positioning bushing B fixing plate, and the positioning bushing A fixing plate, and a second positioning guide pin hole through which the second positioning guide pin can pass is respectively provided on the fixed die base and the fixed template.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. A fixed mold core is provided on the fixed template, and a main runner, side runners, sub-runners and internal runners are provided on the fixed mold core. By providing a splitter block 1 to divide the side runner into a left side runner and a right side runner, and through technical features such as providing splitter block 2, splitter block 3, splitter block 4 and splitter block 5, the molten metal flowing in from the main runner can have different pressures at the initial end and the end of the side runner after being split by the side runner. Furthermore, the pressures on the side opposite to the side runner at the near-main-runner and far-main-runner positions of the sub-runner are also different, and finally the molten metal entering the internal runner has approximately the same pressure in the circumferential direction. In this way, the flow rate of the molten metal cast into the rotor core can be the same, preventing the generation of bubbles. On the one hand, it can improve the production efficiency of the rotor, and on the other hand, it can also improve the product quality of the rotor core; 2. An upper ejector pin is fixedly provided on the upper ejector pin panel, and a lower ejector pin is fixedly provided on the lower ejector pin base plate. By squeezing the upper ejector pin and the lower ejector pin at both ends, the upper ejector pin and the lower ejector pin can further squeeze the molten metal to discharge the remaining bubbles in the rotor core, further improving the product quality; 3. By providing a slider guide plate and slider 1 and slider 2, the rotor core can be further positioned and fixed from both sides, preventing the rotor from shifting during die casting, thus affecting the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view of the high-pressure die casting mold for the rotor core of the present invention.

[0019] Figure 2 is the perspective view of the high-pressure die casting mold for the rotor core of the present invention.

[0020] Figure 3 is the top view of the high-pressure die casting mold for the rotor core of the present invention.

[0021] Figure 4 is Figure 3 the sectional view taken along the A-A direction in

[0022] Figure 5 is Figure 3 the sectional view taken along the B-B direction in

[0023] Figure 6 is Figure 3 the sectional view taken along the C-C direction in

[0024] Figure 7 is the perspective view of the fixed mold base plate.

[0025] Figure 8 is the perspective view of the fixed template.

[0026] Figure 9 is the front view of the fixed mold core.

[0027] Figure 10 isFigure 9 Cross-sectional view in the D-D direction.

[0028] Figure 11 It is the bottom view of the fixed mold core.

[0029] Figure 12 It is the three-dimensional view of the fixed mold core.

[0030] Figure 13 It is the front view of the moving mold core.

[0031] Figure 14 It is Figure 13 Cross-sectional view in the E-E direction.

[0032] Figure 15 It is the three-dimensional view of the moving mold core.

[0033] Explanation of reference numerals: 1. Moving mold; 101. Mold feet; 102. Moving mold substrate; 103. Moving template; 104. Height adjustment plate; 105. Fixed plate for positioning bushing B; 106. Positioning bushing B; 107. Fixed plate for positioning bushing A; 108. Positioning bushing A; 109. Slide guide plate; 110. Slide block; 1101. Slide block one; 1102. Slide block two; 111. Moving mold core; 112. Insert block of moving mold substrate; 113. Lower ejector pin; 114. First lower ejector pin hole; 115. Lower ejector pin bottom plate; 116. Lower ejector pin panel; 117. Third lower ejector pin hole; 2. Fixed mold; 201. Fixed mold substrate; 202. Fixed template; 203. Feeding pipe; 204. Oil cylinder; 205. Upper ejector pin; 206. Upper ejector pin panel; 207. Upper ejector pin hole; 208. Cooling block; 209. First cooling pipe; 301. Fixed mold core; 302. Inner positioning ring of fixed mold core; 303. Outer positioning ring of fixed mold core; 304. Manifold block; 3041. Manifold block one; 3042. Manifold block two; 3043. Manifold block three; 3044. Manifold block four; 3045. Manifold block five; 305. Main runner; 306. Inner runner; 307. Side runner; 3071. Left side runner; 3072. Right side runner; 3073. Outer arc of left side runner; 3074. Outer arc of right side runner; 3075. Return part of left side runner; 3076. Return part of right side runner; 308. Sub-runner; 3y9. Second cooling pipe; 310. Third cooling pipe; 401. First positioning guide post; 402. First guide post hole; 403. Second positioning guide post; 404. Second guide post hole. Detailed implementation manners

[0034] In order to make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention 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 only used to explain the present invention and are not used to limit the present invention.

[0035] As Figure 1 ,Figure 2 , Figure 3 A high-pressure die-casting mold for a rotor core as shown includes a moving die 1 and a fixed die 2. The moving die 1 is used to place the rotor core, and a feeding pipe 203 is arranged on the fixed die 2 for transporting the molten metal to both end faces of the rotor core and into the rotor slots for casting the rotor core.

[0036] As Figures 1 to 6 shown, the moving die 1 includes a die foot 101, a moving die base plate 102, a moving die plate 103, a height adjustment plate 104, a positioning bushing B fixing plate 105, a positioning bushing B 106, a positioning bushing A fixing plate 107, a positioning bushing A 108, a slider guide plate 109, and a slider 110 arranged in sequence. The positioning bushing B 106 is fixed in the positioning bushing B fixing plate 105, and the positioning bushing A 108 is fixed in the positioning bushing A fixing plate 107. The inner circles of the positioning bushing B 106 and the positioning bushing A 108 are matched with the outer diameter of the rotor core to determine the position of the rotor core and are applicable to rotor cores of different diameters; the slider 110 arranged on the slider guide plate 109 is used to fix the rotor core.

[0037] The moving die base plate 102 is fixedly arranged on the die foot 101, and a moving die core 111 is fixed on the moving die base plate 102. For convenient replacement, the moving die core 111 can be fixed on a moving die base plate insert 112, and then the moving die base plate insert 112 is fixed on the moving die base plate 102. The moving die plate 103 further fixes the moving die core 111 on the moving die base plate 102. To be applicable to different moving die cores 111, a height adjustment plate 104 is arranged on the moving die plate 103 to adjust the overall height of the moving die 1 part, and thus it can also be applicable to rotor cores of different heights.

[0038] The moving die core 111 is arranged on the moving die plate 103. Different patterns and shapes can be set on the surface of the moving die core 111 according to the needs of core processing. On the one hand, the moving die core 111 is used to fix the rotor core to prevent the mold from demolding. The moving die core 111 can prevent the casting material from falling off before solidification, ensure the shape of the product, and at the same time prevent gaps from generating inside the mold, thereby maintaining the shape stability of the raw material before solidification, avoiding position deviation, and ensuring the perfect shape of the final product. On the other hand, the moving die core 111 ensures the compactness of the molten metal during casting by forming a compression ratio and necessary forming pressure, thereby producing a casting product with higher strength; a coolant flow channel is arranged in the moving die core 111, which is beneficial to accelerating the cooling and forming of the casting material.

[0039] ‌As Figure 6As shown, a positioning bushing B 106 is arranged inside a positioning bushing B fixing plate 105, and a positioning bushing A 108 is arranged inside a positioning bushing A fixing plate 107. A through hole is arranged between the positioning bushing A 108 and the positioning bushing B 106, and the diameter of the through hole is slightly smaller than the outer diameter of the iron core. The purpose of arranging the positioning bushing B 106 inside the positioning bushing B fixing plate 105 and arranging the positioning bushing A 108 inside the positioning bushing A fixing plate 107 is to be applicable to different iron cores. The positioning bushing A 108 and the positioning bushing B 106 can be replaced. In this way, when processing different iron cores, as long as the positioning bushing A 108 and the positioning bushing B 106 are replaced, the present invention can cast different rotor iron cores.

[0040] As Figure 1 、 Figure 6 shown, a slider 110 is arranged on the positioning bushing A fixing plate 107. The slider 110 is arranged on a slider guide plate 109. The slider 110 includes a slider one 1101 and a slider two 1102. The slider one 1101 and the slider two 1102 are arranged oppositely. The outer sides of the slider one 1101 and the slider two 1102 are connected to a driving component. The driving component drives the slider one 1101 and the slider two 1102 to slide relatively along the slider guide plate 109. In this way, the slider one 1101 and the slider two 1102 can slide on the slider guide plate 109. Under the action of the driving component, the iron core can be clamped or released.

[0041] As Figure 1 、 Figure 6 shown, a moving die base insert 112 is arranged on a moving template 103. A moving die core 111 is arranged on the moving die base insert 112. A first lower ejector pin hole 114 through which a lower ejector pin 113 can pass is arranged inside the moving die base insert 112 and the moving die core 111; a lower ejector pin bottom plate 115 is connected to a driving component of the lower ejector pin bottom plate 115. The driving component of the lower ejector pin bottom plate 115 can drive the lower ejector pin bottom plate 115 to move, so that the lower ejector pin 113 can extrude the molten metal located on the moving die core 111, and the gas in the molten metal of the rotor iron core can be discharged.

[0042] As Figures 13 to 15 A cooling pipe three 310 for the circulation of cooling water is arranged inside the moving die core 111. The cooling pipe three 310 is provided with a water inlet and a water outlet. In this way, the moving die core 111 can be cooled, which is used to cool the cast product after casting and is beneficial to shaping.

[0043] As Figures 3 to 8As shown in the figure, positioning guide pin holes 402 for the first positioning guide pin 401 are respectively provided on the moving die base plate 102, the moving die plate 103, the fixed die base plate 201, the fixed die plate 202, the positioning bushing B fixing plate 105, and the positioning bushing A fixing plate 107, ensuring that the first positioning guide pin 401 has a slight clearance in the guide pin hole 402, neither too loose nor too tight. This allows the moving die base plate 102, the moving die plate 103, the fixed die base plate 201, the fixed die plate 202, the positioning bushing B fixing plate 105, and the positioning bushing A fixing plate 107 to move relative to each other along the first positioning guide pin 401, maintaining their relative positions unchanged, enabling accurate positioning, ensuring smooth guiding, and being beneficial to improving the product quality.

[0044] As Figures 1 to 6 As shown in the figure, the fixed die 2 includes a fixed die base plate 201 and a fixed die plate 202. A feeding tube 203 corresponding to the feeding port, an oil cylinder 204 for extrusion, an upper ejector pin 205, and an upper ejector pin panel 206 are provided on the fixed die base plate 201. The upper ejector pin 205 is fixedly arranged on the upper ejector pin panel 206, and a fixed die core 301 is provided on the fixed die plate 202.

[0045] As Figures 9 to 12As shown, a fixed mold core inner positioning ring 302 is provided in the middle of the fixed mold core 301, a fixed mold core outer positioning ring 303 is provided around the fixed mold core 301, several flow splitting blocks 304 are provided between the fixed mold core inner positioning ring 302 and the fixed mold core outer positioning ring 303, a main runner 305 is provided on one side of the fixed mold core 301, an inner runner 306 is provided between the fixed mold core inner positioning ring 302 and the flow splitting block 304, a side runner 307 is provided between the flow splitting block 304 and the fixed mold core outer positioning ring 303. The flow splitting blocks 304 are arranged in a circular pattern and include a left flow splitting block and a right flow splitting block. A runner 308 is provided between adjacent flow splitting blocks 304, and the runner 308 connects the side runner 307 and the inner runner 306. A first flow splitting block 3041 is provided inside the main runner 305. The first flow splitting block 3041 divides the side runner 307 into a left side runner 3071 and a right side runner 3072, and the first flow splitting block 3041 divides the flow splitting block 304 into a left flow splitting block and a right flow splitting block. Outer arcs of the left side runner 3073 and the right side runner 3074 are provided on the outer walls of the left side runner 3071 and the right side runner 3072 respectively. The outer arcs of the left side runner 3073 and the right side runner 3074 are set as eccentric arcs. The widths of the left side runner 3071 and the right side runner 3072 gradually decrease from the position close to the main runner 305 to the position far from the main runner 305. The left flow splitting block and the right flow splitting block include a second flow splitting block 3042, a third flow splitting block 3043, a fourth flow splitting block 3044 and a fifth flow splitting block 3045 arranged in sequence starting from the first flow splitting block 3041. Two second flow splitting blocks 3042 are provided, and the widths of the runners 308 between the second flow splitting blocks 3042 are the same. A slope is provided on one side of the third flow splitting block 3043 adjacent to the side runner 307. The width of the runner 308 between the third flow splitting blocks 3043 near the side runner 307 is greater than the width near the inner runner 306. A slope is provided on one side of the fifth flow splitting block 3045 adjacent to the side runner 307. The width of the runner 308 between the fifth flow splitting blocks 3045 near the side runner 307 is greater than the width near the inner runner 306. The openings where the runner 308 communicates with the left side runner 3071 and the openings where the runner 308 communicates with the right side runner 3072 gradually increase in width from the second flow splitting block 3042 to the fifth flow splitting block 3045.With the above settings in the present invention, after the metal solution enters from the main flow channel 305, it first passes through the first flow dividing block 3041 to divide the metal solution and enter the left flow channel 3071 and the right flow channel 3072, causing the metal solution to flow in from both the left and right sides simultaneously, accelerating the flow rate. When the metal solution enters the left flow channel 3071 and the right flow channel 3072, since the outer arcs 3073 of the left flow channel and the outer arcs 3074 of the right flow channel are set as eccentric arcs, the widths of the left flow channel 3071 and the right flow channel 3072 gradually decrease from the vicinity of the main flow channel 305 to the far side of the main flow channel 305. This enables the metal solution flowing in from the main flow channel 305, after being divided by the side flow channel 307, to have different pressures at the initial end and the end of the side flow channel 307, and further causes the pressures on the side of the flow dividing channel 308 opposite to the side flow channel 307 near the main flow channel 305 and far from the main flow channel 305 to be different. At the same time, from the second flow dividing block 3042 to the fifth flow dividing block 3045, the width of the flow dividing channel 308 near the side flow channel 307 is greater than the width near the inner flow channel 306, which is conducive to the metal solution flowing from the flow dividing channel 308 into the inner flow channel 306. Due to the openings where the flow dividing channel 308 communicates with the left flow channel 3071 and the openings where the flow dividing channel 308 communicates with the right flow channel 3072, from the second flow dividing block 3042 to the fifth flow dividing block 3045, their widths gradually increase, which is conducive to the inflow of the metal solution in the flow dividing channel 308 between the fifth flow dividing blocks 3045. The widths at the places where the flow dividing channel 308 communicates with the inner flow channel 306 are the same, so that the pressures of the metal solution finally entering the inner flow channel 306 in the circumferential direction are nearly the same. In this way, the pressures and flow rates of the metal solution cast into the rotor core can be the same, ensuring uniform casting, preventing the generation of air bubbles inside the metal at both ends of the rotor core. On the one hand, since the inflow speed and volume are nearly the same, this can improve the production efficiency of the rotor. On the other hand, it can also improve the product quality of the rotor core.

[0046] As Figure 11 shown, at the ends of the left flow channel 3071 and the right flow channel 3072 far from the main flow channel 305, there are provided a left flow channel return part 3075 and a right flow channel return part 3076. Since the outer arcs 3073 of the left flow channel and the outer arcs 3074 of the right flow channel are set as eccentric arcs, when the injected metal solution flows along the eccentric arcs, the metal solution in the left flow channel return part 3075 and the right flow channel return part 3076 can be squeezed from the outer wall into the inner side, thus preventing residues from forming on the side flow channel 307.

[0047] As Figure 6 、 Figure 11As shown, on the inner runner 306 of the fixed mold core 301, there is also an upper ejector pin hole 207 corresponding to the upper ejector pin 205. The upper ejector pin holes 207 are distributed in a circular ring shape, which can extrude the molten metal located on the moving mold core 111 and discharge the gas in the molten metal of the rotor core.

[0048] As Figure 3 , Figure 6 shown, a cooling block 208 is provided on the fixed mold base plate 201. Inside the cooling block 208, there is a first cooling pipe 209 for the circulation of cooling water. The first cooling pipes 209 are arranged in one to three layers, and the first cooling pipes 209 in one to three layers are interconnected, which can cool the cooling block 208, and the cooling block 208 can cool the fixed mold base plate 201.

[0049] As Figure 6 shown, a second cooling pipe 309 for the circulation of cooling water is provided inside the fixed mold core 301. The second cooling pipe 309 has a water inlet and a water outlet, which can cool the fixed mold core 301 and accelerate the cooling of the molten metal in the fixed mold core 301.

[0050] As Figure 4 shown, on the fixed mold base plate 201 and the fixed mold plate 202, there are respectively second positioning guide pin holes 404 through which the second positioning guide pins 403 can pass. By providing the second positioning guide pins 403, the relative position between the fixed mold base plate 201 and the fixed mold plate 202 can be determined, accurate positioning can be achieved, smooth guiding can be ensured, which is beneficial to improving the quality of the product.

[0051] As Figure 1 , Figure 5 , Figure 6 , Figure 11As shown, a lower ejector plate 115 is provided on the die shoe 101 for fixing the lower ejector pins 113 in the mold. A lower ejector plate panel 116 is provided on the lower ejector plate 115. A third lower ejector pin hole 117 is provided on the lower ejector plate panel 116. The lower ejector pins 113 are fixedly provided on the lower ejector plate 115. The lower ejector pins 113 pass through the third lower ejector pin hole 117. The lower ejector plate panel 116 further fixes the lower ejector pins 113 on the lower ejector plate 115. The lower ejector plate 115 and the lower ejector plate panel 116 are fixed by screws. A first lower ejector pin hole 114 through which the lower ejector pins 113 can pass is provided in the moving die substrate insert 112 and the moving die core 111. An upper ejector pin 205 is fixedly provided on the upper ejector plate panel 206. An upper ejector pin hole 207 corresponding to the upper ejector pin 205 is further provided on the inner runner 306 of the fixed die core 301. The upper ejector pin holes 207 are distributed in a circular ring shape. Thus, after the rotor core is cast and undergoes preliminary cooling, the driving component of the lower ejector plate 115 drives the lower ejector plate 115 to move inward, so that the lower ejector pins 113 can squeeze the metal cast on the core on the moving die core 111. At the same time, the upper ejector plate panel 206 is driven to move inward, and the upper ejector pins 205 pass through the upper ejector pin holes 207 to apply pressure to the metal. By applying pressure to the cast part from both ends simultaneously, the gas in the metal cast in the core can be discharged.

[0052] During the casting process of the rotor core, first, the slider 1101 and the slider 1102 are opened, and the rotor core is placed on the moving die core 111 through the positioning bush A 108 and the positioning bush B 106. Then, the driving component is used to drive the slider 1101 and the slider 1102 to slide relatively along the slider guide plate 109, and the slider 1101 and the slider 1102 are used to clamp the core. Then, the driving device is used to move the moving die 1 under the fixed die 2 to make the moving die 1 and the fixed die 2 close. Then, the molten metal is poured into the fixed die core 301 through the feeding pipe 203. The molten metal generally uses ADC12, which is a high-silicon aluminum alloy composed of elements such as aluminum, silicon, magnesium, copper, and iron. After casting and forming, it has good corrosion resistance and anti-cracking performance and is suitable for manufacturing motor rotors, automobile parts, etc. The molten metal in the fixed die core 301 flows from the main runner 305 through the splitter block 3041 into the left runner 3071 and the right runner 3072 respectively. Through the action of the splitter block 304, it flows into the inner runner 306, then flows through the inner runner 306 to the surface of the rotor core, then flows through the surface of the rotor core into the rotor core slot body, then flows out of the rotor core slot body, flows to the surface of the other end of the rotor core, and flows onto the moving die core 111, and finally forms. When the casting is completed, the driving component of the lower ejector plate 115 drives the lower ejector plate 115 to move upward, so that the lower ejector pin 113 can extrude the metal cast on the rotor core on the moving die core 111. At the same time, the upper oil cylinder 204 drives the upper ejector pin panel 206 to move downward, and the upper ejector pin 205 presses on the molten metal through the upper ejector pin hole 207. By pressing on the casting part at both ends simultaneously, the gas in the metal in the core can be discharged. In this way, the casting process is fast, the flow rate of the molten metal in each slot body is uniform, the generation of air holes can be prevented, and the product quality can be improved.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. For those of ordinary skill in the art, several variations and improvements can be made without departing from the premise of the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A high-pressure die-casting mold for a rotor core, comprising a movable mold (1) and a fixed mold (2), wherein the movable mold (1) comprises a mold foot (101), a movable mold base plate (102), a movable mold plate (103), a height adjustment plate (104), a positioning bushing B fixing plate (105), a positioning bushing B (106), a positioning bushing A fixing plate (107), a positioning bushing A (108), a slider guide plate (109) and a slider (110) which are arranged in sequence, a movable mold core (111) is arranged on the movable mold plate (103), and a movable mold core (111) is arranged on the positioning bushing. A positioning bushing B (106) is provided in the B fixed plate (105), a positioning bushing A (108) is provided in the positioning bushing A fixed plate (107), the fixed mold (2) comprises a fixed mold base plate (201) and a fixed mold plate (202), a feed pipe (203) corresponding to the feed port, an oil cylinder (204) for extrusion, an upper ejector pin (205), and an upper ejector pin panel (206), and an upper ejector pin (205) is fixedly provided on the upper ejector pin panel (206), characterized in that: A fixed mold core (301) is provided on the fixed mold plate (202), a fixed mold core inner positioning ring (302) is provided in the middle of the fixed mold core (301), a fixed mold core outer positioning ring (303) is provided around the fixed mold core (301), a plurality of diversion blocks (304) are provided between the fixed mold core inner positioning ring (302) and the fixed mold core outer positioning ring (303), a main flow channel (305) is provided on one side of the fixed mold core (301), an inner flow channel ( 306), a side flow channel (307) is provided between the diverter block (304) and the outer positioning ring (303) of the fixed mold core, the diverter blocks (304) are arranged in a circular shape, including a left diverter block and a right diverter block, a diverter channel (308) is provided between adjacent diverter blocks (304), the diverter channel (308) connects the side flow channel (307) and the inner flow channel (306), and an upper ejector pin hole (207) corresponding to the upper ejector pin (205) is further provided on the inner flow channel (306) of the fixed mold core (301), and the upper ejector pin holes (207) are distributed in a circular ring shape.

2. The high-pressure die-casting mold for a rotor core according to claim 1, characterized in that: A diverter block 1 (3041) is provided inside the main flow channel (305), and the diverter block 1 (3041) divides the side flow channel (307) into a left flow channel (3071) and a right flow channel (3072). The outer walls of the left flow channel (3071) and the right flow channel (3072) are provided with a left flow channel outer arc (3073) and a right flow channel outer arc (3074), respectively. The left flow channel outer arc (3073) and the right flow channel outer arc (3074) are provided as eccentric arcs. The width of the left flow channel (3071) and the right flow channel (3072) gradually decreases from close to the main flow channel (305) to away from the main flow channel (305). The left diverter block and the right diverter block include diverter block one (3041), diverter block two (3042), diverter block three (3043), diverter block four (3044) and diverter block five (3045) arranged in sequence starting from diverter block one (3041). The diverter block two (3042) is set to two. The diverter channels (308) between the diverter blocks two (3042) have the same width. The diverter block three (3043) is provided with an oblique side adjacent to the side flow channel (307). The width of the diverter channel (308) between the diverter blocks (3043) at the proximal side channel (307) is greater than the width at the proximal inner channel (306). A slope is provided on the side of the diverter block (3045) adjacent to the side channel (307). The width of the diverter channel (308) between the diverter blocks (3045) at the proximal side channel (307) is greater than the width at the proximal inner channel (306). The width of the opening where the diverter channel (308) communicates with the left side channel (3071) and the opening where the diverter channel (308) communicates with the right side channel (3072) gradually increases from the diverter block (3041) to the diverter block (3044).

3. The high-pressure die-casting mold for a rotor core according to claim 2, characterized in that: A left flow channel return portion (3075) and a right flow channel return portion (3076) are provided at the ends of the left flow channel (3071) and the right flow channel (3072) away from the main flow channel (305).

4. The high-pressure die-casting mold for a rotor core according to claim 3, characterized in that: The width of the junction between the branch channel (308) and the inner channel (306) is the same.

5. The high-pressure die-casting mold for a rotor core according to claim 4, characterized in that: A movable mold base plate insert (112) is provided on the movable mold plate (103), the movable mold core (111) is provided on the movable mold base plate insert (112), and a lower ejector hole (114) for a lower ejector (113) to pass through is provided in the movable mold base plate insert (112) and the movable mold core (111).

6. The high-pressure die-casting mold for a rotor core according to claim 4, characterized in that: The slider (110) arranged above the positioning bushing A fixing plate (107) includes a slider 1 (1101) and a slider 2 (1102). The slider 1 (1101) and the slider 2 (1102) are arranged relative to each other. The outer sides of the slider 1 (1101) and the slider 2 (1102) are connected to the driving component. The driving component drives the slider 1 (1101) and the slider 2 (1102) to slide relative to each other along the slider guide plate (109).

7. The high-pressure die-casting mold for a rotor core according to claim 1, characterized in that: A cooling block (208) is provided on the fixed mold base plate (201), a cooling pipe 1 (209) for circulating cooling water is provided in the cooling block (208), a cooling pipe 2 (309) for circulating cooling water is provided in the fixed mold core (301), and a cooling pipe 3 (310) for circulating cooling water is provided inside the movable mold core (111).

8. The high-pressure die-casting mold for a rotor core according to claim 1, characterized in that: A lower ejector base plate (115) is provided on the mold foot (101), a lower ejector panel (116) is provided on the lower ejector base plate (115), a lower ejector hole three (117) is provided on the lower ejector panel (116), a lower ejector (113) is fixedly provided on the lower ejector base plate (115), and the lower ejector (113) passes through the lower ejector hole three (117).

9. A rotor core high pressure die casting mold according to any one of claims 1 to 8, characterized in that: A first positioning guide post hole (402) for allowing a first positioning guide post (401) to pass through is provided on the movable mold base plate (102), the movable mold plate (103), the fixed mold base plate (201), the fixed mold plate (202), the positioning bushing B fixing plate (105), and the positioning bushing A fixing plate (107), respectively. A second positioning guide post hole (404) for allowing a second positioning guide post (403) to pass through is provided on the fixed mold base plate (201) and the fixed mold plate (202), respectively.

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