Plastic coating forming mold for rotor

Abstract

The invention discloses a rotor plastic coating forming mold, and aims to overcome the defects that two-time insert placement and two-time injection molding are needed in the rotor insert plastic coating process, and time and labor cost are increased. The mold comprises a mold body, a rotating column and a mold core are arranged in the mold body, a cavity is formed in the mold core, a rotor insert is loaded in the cavity, a supporting assembly and a plurality of positioning assemblies arranged at intervals are installed on the mold core, the supporting assembly comprises a plurality of supporting rods, and the supporting rods are supported at the end of the rotor insert. The positioning assembly comprises a plurality of positioning clamping rods arranged at intervals in the circumferential direction, one ends of the positioning clamping rods abut against the outer wall of the rotor insert, and the other ends of the positioning clamping rods are connected with the rotating column. The rotating column rotates to drive the supporting rod and the positioning clamping rod to move. According to the rotor plastic coating forming mold, plastic coating forming of the rotor insert can be completed through one-time injection molding, the working procedures are reduced, the working efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and more particularly to a rotor overmolding mold. Background Art

[0002] At present, the rotor products used in filters need to overmold the NdFeB insert as a whole inside the plastic rotor body. Since the NdFeB insert part cannot be positioned in the mold, it usually requires two overmoldings to produce it. One is to fix the inner glue position of the outer injection molding, and the second is to position the outer glue position with the inner side injection molding; or the outer glue position is injected first, and then the inner glue position is injected. The whole process requires two insert placements and two injection moldings, which increases time and labor costs. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a rotor overmolding mold, which can complete the overmolding of the rotor insert through one injection molding, thereby reducing the number of working steps, improving work efficiency and reducing labor costs.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a rotor overmolding mold, including a mold body, a rotating column and a mold core are arranged in the mold body, a cavity is arranged in the mold core, a rotor insert is loaded in the cavity, a support assembly and a plurality of spaced positioning assemblies are installed on the mold core, the support assembly includes a plurality of support rods, the support rods are supported on the end of the rotor insert, the positioning assembly includes a plurality of circumferentially spaced positioning clamping rods, one end of the positioning clamping rod is abutted against the outer wall of the rotor insert, and the other end of the positioning clamping rod is connected to the rotating column; the rotating column rotates to drive the support rod and the positioning clamping rod to move.

[0005] During rotor overmolding, the rotor insert is first loaded into the cavity, and then the rotating column rotates to drive the support rod and the positioning clamp rod to move. The support rod moves upward to support the rotor insert. At the same time, the end of the positioning clamp rod is close to the outer wall of the rotor insert, thereby realizing the circumferential positioning of the rotor insert and positioning the rotor insert to the center. At this time, the rotor insert is accurately positioned. There is a gap between the lower end of the rotor insert and the bottom of the cavity, and there is a gap between the outer wall of the rotor insert and the inner wall of the cavity. After that, plastic raw materials are injected into the cavity. When two-thirds of the volume is injected, the rotating column rotates in the opposite direction, and the support rod moves downward to disengage from the rotor insert. At the same time, the positioning clamp rod moves away from the outer wall of the rotor insert, and the end of the positioning clamp rod disengages from the rotor insert to the inner wall of the cavity. Plastic raw materials continue to be injected into the cavity until the product is filled. Finally, the ejector pushes the product out and enters the next injection molding cycle.

[0006] After a certain amount of injection molding is completed in the cavity, the rotor insert has been surrounded by the plastic material and has been positioned. At this time, the support rod and the positioning clamp rod are removed, and then the rotor insert position remains unchanged during the process of continuing to inject the plastic material, thereby ensuring the accuracy of the rotor insert injection position.

[0007] The rotor overmolding mold of the patent application can complete the overmolding of the rotor insert through one injection molding, which reduces the working procedures, improves the work efficiency and reduces the labor cost.

[0008] Preferably, a guide groove corresponding to the positioning clamp rod is provided on the mold core, the guide groove is radially arranged, and the positioning clamp rod is movably plug-in connected to the guide groove.

[0009] The guide groove realizes the positioning and guiding function of the positioning clamp rod, so that the positioning clamp rod can only move along the direction of the guide groove.

[0010] Preferably, a driving groove corresponding to the positioning clamp rod is provided on the rotating column, the driving groove gradually moves away from the rotor insert from one end to the other end, and a mounting head is provided on the positioning clamp rod, and the mounting head is movably inserted in the driving groove.

[0011] The driving groove is inclined from one end to the other end in a direction away from the rotor insert. During the rotation of the rotating column, the driving groove cooperates with the mounting head to achieve a push-pull effect on the positioning clamping rod.

[0012] Preferably, a lifting slot corresponding to the support rod is arranged on the rotating column, the lifting slot is arranged obliquely, a lifting head is arranged at the lower end of the support rod, and the lifting head is movably inserted in the lifting slot.

[0013] The lifting slot is tilted, and the lifting and lowering movement of the support rod is realized through the cooperation between the lifting head and the lifting slot during the rotation of the rotating column.

[0014] Preferably, the shaft core is inserted into the cavity, the rotor insert is sleeved on the outer periphery of the shaft core, a step surface is arranged at the lower part of the shaft core, a step hole is arranged on the mold core, and the lower part of the shaft core is adapted to be inserted into the step hole.

[0015] The setting of the shaft core forms a center hole on the product after injection molding, and the lower part of the shaft core is adapted to be inserted into the step hole to prevent the shaft core from moving during the demoulding process of the product.

[0016] Preferably, an installation cavity is provided on the mold body, the rotating column is rotatably installed in the installation cavity, a limit block is connected to the mold body, a limit groove is provided on the rotating column, and the end of the limit block is movably inserted in the limit groove to limit the rotation angle of the rotating column.

[0017] The installation cavity facilitates the installation of the rotating column. The setting of the limit groove and the limit block realizes the limitation of the rotation angle of the rotating column, ensuring the accuracy of the rotation angle of the rotating column.

[0018] Preferably, a pouring gate is provided at the bottom of the cavity, and the pouring gate extends to the lower end surface of the mold core.

[0019] The pouring gate is set at the bottom of the cavity, and the plastic raw materials are injected from bottom to top, which is conducive to the molding of the product.

[0020] Preferably, a rack is installed on the mold body, and meshing teeth are provided on the rotating column, and the meshing teeth are meshed with the rack for transmission.

[0021] The rotation of the rotating column is driven by the movement of the rack, which is stable and reliable.

[0022] Preferably, the rotating column comprises an upper column, a middle column and a lower column, each of the upper column and the middle column is provided with a corresponding set of positioning components, an insert is installed in the lower column, and the lower end of the support rod is connected to the insert.

[0023] The rotating column formed by connecting the upper column, the middle column and the lower column facilitates the assembly of parts. The two sets of positioning components are provided to improve the reliability of the positioning of the rotor insert.

[0024] Preferably, the mold body includes an upper mold and a lower mold, the rotating column and the mold core are arranged in the lower mold, and a mold cavity is arranged in the upper mold, and the mold cavity and the mold cavity are arranged correspondingly up and down.

[0025] The mold body composed of an upper mold and a lower mold facilitates the demoulding operation.

[0026] Compared with the prior art, the beneficial effects of the present invention are: (1) the rotor overmolding mold of the patent application can complete the overmolding of the rotor insert through one injection molding, which reduces the number of steps, improves work efficiency, and reduces labor costs; (2) the positioning of the rotor insert during the overmolding process is accurate and reliable, with good concentricity, ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the present invention.

[0028] Figure 2 It is a schematic diagram of a lower mold of the present invention.

[0029] Figure 3 It is a schematic diagram of the connection between the rotating column and the rack of the present invention.

[0030] Figure 4 It is a top view of the connection between the rotating column and the rack of the present invention.

[0031] Figure 5 It is a core structure diagram of the present invention.

[0032] Figure 6 It is a view inside the cavity of the present invention.

[0033] Figure 7It is a partial exploded view of the position of the rotating column of the present invention.

[0034] Figure 8 It is a partial exploded view of the rotating column position in another direction of the present invention.

[0035] Fig. 9 It is a partial cross-sectional view of Example 2 of the present invention.

[0036] In the figure: 1. mold body, 2. rotating column, 3. mold core, 4. cavity, 5. upper mold, 6. lower mold, 7. mold cavity, 8. rotor insert, 9. shaft core, 10. step surface, 11. step hole, 12. plastic positioning ring, 13. positioning rib, 14. heating wire, 15. support rib, 16. support assembly, 17. positioning assembly, 18. support rod, 19. through hole, 20. positioning clamp rod, 21. guide groove, 22. drive groove, 23. mounting head, 24. lifting groove , 25, lifting head, 26, pouring gate, 27, mounting groove, 28, mounting cavity, 29, limit block, 30, limit groove, 31, rack, 32, meshing tooth, 33, upper column, 34, middle column, 35, lower column, 36, insert, 37, anti-rotation convex strip, 38, anti-rotation groove, 39, square boss, 40, square groove, 41, sink groove, 42, connecting column, 43, lower inclined surface, 44, upper inclined surface, 45, through hole, 46, avoidance groove. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: A rotor overmolding mold (see Figures 1 to 8 ), including a mold body 1, a rotating column 2 and a core 3 are arranged in the mold body 1, the rotating column 2 is sleeved on the periphery of the core 3, a cavity 4 is arranged in the core 3, the mold body 1 includes an upper mold 5 and a lower mold 6, the rotating column 2 and the core 3 are arranged in the lower mold 6, a cavity 7 is arranged in the upper mold 5, and the cavity 7 and the cavity 4 are arranged correspondingly up and down. The rotor insert 8 is loaded in the cavity 4, and the rotor insert 8 is a cylindrical structure with openings at both ends. The shaft core 9 is inserted in the cavity 4, and the rotor insert 8 is sleeved on the periphery of the shaft core 9. A step surface 10 is arranged at the lower part of the shaft core 9, and a step hole 11 is arranged on the core 3, and the lower part of the shaft core 9 is adapted to be inserted into the step hole 11. The arrangement of the shaft core 9 forms a center hole on the product after injection molding, and the lower part of the shaft core 9 is adapted to be inserted into the step hole 11 to prevent the shaft core 9 from moving during the demolding process of the product.

[0038] A support assembly 16 and a plurality of positioning assemblies 17 arranged at intervals are installed on the mold core 3. In this embodiment, two groups of positioning assemblies 17 are arranged at intervals in the upper and lower directions. The support assembly 16 includes a plurality of support rods 18. In this embodiment, four support rods 18 are evenly distributed circumferentially. The support rod 18 is supported at the end of the rotor insert 8. Through holes 19 are correspondingly arranged at the bottom of the cavity 4 and the support rod 18. The support rod 18 is adapted to be plug-in connected with the through holes 19. The positioning assembly 17 includes a plurality of positioning clamping rods 20 arranged at intervals in the circumferential direction. In this embodiment, each group of positioning assemblies 17 includes four positioning clamping rods 20 evenly distributed circumferentially. One end of the positioning clamping rod 20 is abutted against the outer wall of the rotor insert 8, and the other end of the positioning clamping rod 20 is connected to the rotating column 2; the rotating column 2 rotates to drive the support rod 18 and the positioning clamping rod 20 to move.

[0039] The mold core 3 is provided with a guide groove 21 corresponding to the positioning clamp rod 20, the guide groove 21 is arranged radially, and the positioning clamp rod 20 is movably plugged into the guide groove 21. The cross-sections of the positioning clamp rod 20 and the guide groove 21 are both rectangular structures, and the guide groove 21 realizes the positioning and guiding function of the positioning clamp rod 20, so that the positioning clamp rod 20 can only move along the direction of the guide groove 21.

[0040] The rotating column 2 is provided with a driving groove 22 corresponding to the positioning clamp rod 20. The driving groove 22 is an arc-shaped structure. The length direction of the driving groove 22 is arranged along the circumferential direction. The driving groove 22 gradually moves away from the rotor insert 8 from one end to the other end. The positioning clamp rod 20 is provided with a mounting head 23, which is movably inserted in the driving groove 22. The driving groove 22 is inclined from one end to the other end in a direction away from the rotor insert 8. During the rotation of the rotating column 2, the driving groove 22 cooperates with the mounting head 23 to achieve a push-pull effect on the positioning clamp rod 20.

[0041] The rotating column 2 is provided with a lifting groove 24 corresponding to the support rod 18. The lifting groove 24 is tilted and tilted upward along the circumferential direction. A lifting head 25 is provided at the lower end of the support rod 18, and the lifting head 25 is movably inserted in the lifting groove 24. The lifting groove 24 is tilted, and the lifting groove 24 realizes the lifting and moving of the support rod 18 through the cooperation of the lifting head 25 and the lifting groove 24 during the rotation of the rotating column 2. Four pouring gates 26 are evenly distributed circumferentially at the bottom of the cavity 4, and the pouring gates 26 extend to the lower end surface of the core 3. The pouring gate 26 is arranged at the bottom of the cavity 4, and the plastic raw materials are injected from the bottom to the top, which is conducive to the formation of the product. The core 3 has a T-shaped structure, and a step hole 11 adapted to the shaft core 9 is arranged at the bottom of the cavity 4. The step hole 11 extends to the lower end surface of the core 3, and the lower end of the core 9 is adapted to the step hole 11. A mounting groove 27 is provided on the lower outer wall of the mold core 3 corresponding to the support rod 18 , and the mounting groove 27 and the through hole 19 are provided correspondingly, and the support rod 18 is accommodated in the mounting groove 27 .

[0042] The mold body 1 is provided with a mounting cavity 28, and the rotating column 2 is rotatably mounted in the mounting cavity 28. The mold body 1 is connected with a limit block 29, and a limit groove 30 is provided on the rotating column 2. The limit groove 30 is an arc-shaped structure, and the end of the limit block 29 is movably inserted in the limit groove 30 to limit the rotation angle of the rotating column 2. The mounting cavity 28 facilitates the installation of the rotating column 2. The setting of the limit groove 30 and the limit block 29 realizes the limitation of the rotation angle of the rotating column 2 and ensures the accuracy of the rotation angle of the rotating column 2. A rack 31 is installed on the mold body 1, and meshing teeth 32 are provided on the rotating column 2, and the meshing teeth 32 are meshed with the rack 31 for transmission. Two rotating columns 2 are relatively arranged on the mold body 1, and the rack 31 is installed between the two rotating columns 2.

[0043] The rotating column 2 includes an upper column 33, a middle column 34 and a lower column 35, which are arranged in sequence from top to bottom. A set of positioning components 17 is arranged corresponding to each of the upper column 33 and the middle column 34. An insert 36 is installed in the lower column 35, and the lower end of the support rod 18 is connected to the insert 36. The rotating column 2 formed by connecting the upper column 33, the middle column 34 and the lower column 35 together facilitates the assembly of parts. The two sets of positioning components 17 are arranged to improve the reliability of positioning the rotor insert 8.

[0044] A plurality of anti-rotation convex strips 37 are arranged at intervals in the circumferential direction on the lower surface of the upper cylinder 33, and anti-rotation grooves 38 are arranged on the upper surface of the middle cylinder 34 in correspondence with the anti-rotation convex strips 37. The anti-rotation convex strips 37 and the anti-rotation grooves 38 are adapted to be plugged in and connected, thereby realizing the circumferential locking of the upper cylinder 33 and the middle cylinder 34. A square boss 39 is arranged on the lower surface of the middle cylinder 34, and a square groove 40 is arranged on the upper surface of the lower cylinder 35. The square boss 39 and the square groove 40 are adapted to be plugged in and connected, thereby realizing the circumferential locking of the middle cylinder 34 and the lower cylinder 35. A square groove 41 is provided on the lower surface of the lower column 35, a through hole is provided at the bottom of the groove 41, the lower part of the insert 36 is in a square structure, a cylindrical connecting column 42 is provided on the upper part of the insert 36, a plurality of lower inclined surfaces 43 are evenly distributed circumferentially on the end surface of the connecting column 42, a convex ring is provided on the inner wall of the through hole, an upper inclined surface 44 is provided on the lower end surface of the convex ring corresponding to the lower inclined surface 43, and the space between the lower inclined surface 43 and the upper inclined surface 44 forms a lifting groove 24. The connecting column 42 on the upper part of the insert 36 is adapted to be connected with the through hole, and the lower part of the insert 36 is adapted to be connected with the groove 41 to realize the circumferential locking of the insert 36 and the lower column 35. A through hole 45 is provided on the insert 36, and the lower part of the mold core 3 passes through the through hole 45.

[0045] The upper cylinder 33 and the middle cylinder 34 are both provided with driving grooves 22 on their upper surfaces. Avoidance grooves 46 are provided on their upper surfaces corresponding to the driving grooves 22. The avoidance grooves 46 are connected between the driving grooves 22 and the inner wall of the rotating cylinder 2. The positioning clamp rod 20 passes through the avoidance grooves 46. The avoidance grooves 46 can prevent the rotating cylinder 2 from interfering with the positioning clamp rod 20 during rotation. The inner end surface of the positioning clamp rod 20 is adapted to the outer wall of the product.

[0046] When the rotor is overmolded, the rotor insert 8 is first loaded into the cavity 4, and then the rack 31 is moved, and the transmission connection between the rack 31 and the meshing teeth 32 drives the rotating column 2 to rotate, and the lifting slot 24 on the rotating column 2 pushes the support rod 18 to move upward, and the driving slot 22 on the rotating column 2 pushes the positioning clamp rod 20 to move radially inward, and the support rod 18 moves upward to the position to support the rotor insert 8. At the same time, the end of the positioning clamp rod 20 is close to the outer wall of the rotor insert 8, so as to realize the circumferential positioning of the rotor insert 8 and position the rotor insert 8 to the center. At this time, the rotor insert 8 is accurately positioned. There is a gap between the lower end of the rotor insert 8 and the bottom of the cavity 4, a gap between the outer wall of the rotor insert 8 and the inner wall of the cavity 4, and a gap between the inner wall of the rotor insert 8 and the outer wall of the shaft core 9. After that, plastic raw materials are injected into the mold cavity 4 through the pouring port 26 set at the lower end of the mold core 3. When two-thirds of the volume is injected, the end of the positioning clamp rod 20 exposed in the mold cavity 4 is covered by plastic. At this time, the rack 31 is moved in the opposite direction, the rotating column 2 rotates in the opposite direction, and the support rod 18 moves downward to be in place and thus detached from the rotor insert 8. At the same time, the positioning clamp rod 20 moves in a direction away from the outer wall of the rotor insert 8, and the end of the positioning clamp rod 20 detaches from the rotor insert 8 to the inner wall of the mold cavity 4. The plastic raw materials are continuously injected into the mold cavity 4 until the product is filled. Finally, the ejector pushes the product out and enters the next injection cycle.

[0047] After a certain amount of injection molding is completed in the cavity 4, the rotor insert 8 has been surrounded by the plastic material and has been positioned. At this time, the support rod 18 and the positioning clamp rod 20 are removed, and then the position of the rotor insert 8 remains unchanged during the process of continuing to inject the plastic material, thereby ensuring the accuracy of the injection molding position of the rotor insert 8.

[0048] Embodiment 2: A rotor overmolding mold (see Figures 2 to 9), including a mold body 1, a rotating column 2 and a core 3 are arranged in the mold body 1, the rotating column 2 is sleeved on the periphery of the core 3, a cavity 4 is arranged in the core 3, the mold body 1 includes an upper mold 5 and a lower mold 6, the rotating column 2 and the core 3 are arranged in the lower mold 6, a cavity 7 is arranged in the upper mold 5, and the cavity 7 and the cavity 4 are arranged correspondingly up and down. The rotor insert 8 is loaded in the cavity 4, and the rotor insert 8 is a cylindrical structure with openings at both ends. The shaft core 9 is inserted in the cavity 4, and the rotor insert 8 is sleeved on the periphery of the shaft core 9. A step surface 10 is arranged at the lower part of the shaft core 9, and a step hole 11 is arranged on the core 3, and the lower part of the shaft core 9 is adapted to be inserted into the step hole 11. The arrangement of the shaft core 9 forms a center hole on the product after injection molding, and the lower part of the shaft core 9 is adapted to be inserted into the step hole 11 to prevent the shaft core 9 from moving during the demolding process of the product. The mold cavity 4 is loaded with a plastic positioning ring 12, and a plurality of circumferentially spaced positioning ribs 13 are arranged on the plastic positioning ring 12, and the upper end of the positioning rib 13 is supported on the inner wall of the mold cavity 4, and the lower end of the positioning rib 13 is supported on the upper end surface of the rotor insert 8. The mold body 1 is installed with a heating wire 14 corresponding to the plastic positioning ring 12, and the heating wire 14 is placed on the periphery of the mold cavity 4. The outer edge of the plastic positioning ring 12 is provided with a plurality of circumferentially spaced supporting ribs 15, and the ends of the supporting ribs 15 are supported on the inner wall of the mold cavity 4 to realize the positioning of the plastic positioning ring 12.

[0049] A support assembly 16 and a plurality of positioning assemblies 17 arranged at intervals are installed on the mold core 3. In this embodiment, two groups of positioning assemblies 17 are arranged at intervals in the upper and lower directions. The support assembly 16 includes a plurality of support rods 18. In this embodiment, four support rods 18 are evenly distributed circumferentially. The support rod 18 is supported at the end of the rotor insert 8. Through holes 19 are correspondingly arranged at the bottom of the cavity 4 and the support rod 18. The support rod 18 is adapted to be plug-in connected with the through holes 19. The positioning assembly 17 includes a plurality of positioning clamping rods 20 arranged at intervals in the circumferential direction. In this embodiment, each group of positioning assemblies 17 includes four positioning clamping rods 20 evenly distributed circumferentially. One end of the positioning clamping rod 20 is abutted against the outer wall of the rotor insert 8, and the other end of the positioning clamping rod 20 is connected to the rotating column 2; the rotating column 2 rotates to drive the support rod 18 and the positioning clamping rod 20 to move.

[0050] The mold core 3 is provided with a guide groove 21 corresponding to the positioning clamp rod 20, the guide groove 21 is arranged radially, and the positioning clamp rod 20 is movably plugged into the guide groove 21. The cross-sections of the positioning clamp rod 20 and the guide groove 21 are both rectangular structures, and the guide groove 21 realizes the positioning and guiding function of the positioning clamp rod 20, so that the positioning clamp rod 20 can only move along the direction of the guide groove 21.

[0051] The rotating column 2 is provided with a driving groove 22 corresponding to the positioning clamp rod 20. The driving groove 22 is an arc-shaped structure. The length direction of the driving groove 22 is arranged along the circumferential direction. The driving groove 22 gradually moves away from the rotor insert 8 from one end to the other end. The positioning clamp rod 20 is provided with a mounting head 23, which is movably inserted in the driving groove 22. The driving groove 22 is inclined from one end to the other end in a direction away from the rotor insert 8. During the rotation of the rotating column 2, the driving groove 22 cooperates with the mounting head 23 to achieve a push-pull effect on the positioning clamp rod 20.

[0052] The rotating column 2 is provided with a lifting groove 24 corresponding to the support rod 18. The lifting groove 24 is tilted and tilted upward along the circumferential direction. A lifting head 25 is provided at the lower end of the support rod 18, and the lifting head 25 is movably inserted in the lifting groove 24. The lifting groove 24 is tilted, and the lifting groove 24 realizes the lifting and moving of the support rod 18 through the cooperation of the lifting head 25 and the lifting groove 24 during the rotation of the rotating column 2. Four pouring gates 26 are evenly distributed circumferentially at the bottom of the cavity 4, and the pouring gates 26 extend to the lower end surface of the core 3. The pouring gate 26 is arranged at the bottom of the cavity 4, and the plastic raw materials are injected from the bottom to the top, which is conducive to the formation of the product. The core 3 has a T-shaped structure, and a step hole 11 adapted to the shaft core 9 is arranged at the bottom of the cavity 4. The step hole 11 extends to the lower end surface of the core 3, and the lower end of the core 9 is adapted to the step hole 11. A mounting groove 27 is provided on the lower outer wall of the mold core 3 corresponding to the support rod 18 , and the mounting groove 27 and the through hole 19 are provided correspondingly, and the support rod 18 is accommodated in the mounting groove 27 .

[0053] The mold body 1 is provided with a mounting cavity 28, and the rotating column 2 is rotatably mounted in the mounting cavity 28. The mold body 1 is connected with a limit block 29, and a limit groove 30 is provided on the rotating column 2. The limit groove 30 is an arc-shaped structure, and the end of the limit block 29 is movably inserted in the limit groove 30 to limit the rotation angle of the rotating column 2. The mounting cavity 28 facilitates the installation of the rotating column 2. The setting of the limit groove 30 and the limit block 29 realizes the limitation of the rotation angle of the rotating column 2 and ensures the accuracy of the rotation angle of the rotating column 2. A rack 31 is installed on the mold body 1, and meshing teeth 32 are provided on the rotating column 2, and the meshing teeth 32 are meshed with the rack 31 for transmission. Two rotating columns 2 are relatively arranged on the mold body 1, and the rack 31 is installed between the two rotating columns 2.

[0054] The rotating column 2 includes an upper column 33, a middle column 34 and a lower column 35, which are arranged in sequence from top to bottom. A set of positioning components 17 is arranged corresponding to each of the upper column 33 and the middle column 34. An insert 36 is installed in the lower column 35, and the lower end of the support rod 18 is connected to the insert 36. The rotating column 2 formed by connecting the upper column 33, the middle column 34 and the lower column 35 together facilitates the assembly of parts. The two sets of positioning components 17 are arranged to improve the reliability of positioning the rotor insert 8.

[0055] A plurality of anti-rotation convex strips 37 are arranged at intervals in the circumferential direction on the lower surface of the upper cylinder 33, and anti-rotation grooves 38 are arranged on the upper surface of the middle cylinder 34 in correspondence with the anti-rotation convex strips 37. The anti-rotation convex strips 37 and the anti-rotation grooves 38 are adapted to be plugged in and connected, thereby realizing the circumferential locking of the upper cylinder 33 and the middle cylinder 34. A square boss 39 is arranged on the lower surface of the middle cylinder 34, and a square groove 40 is arranged on the upper surface of the lower cylinder 35. The square boss 39 and the square groove 40 are adapted to be plugged in and connected, thereby realizing the circumferential locking of the middle cylinder 34 and the lower cylinder 35. A square groove 41 is provided on the lower surface of the lower column 35, a through hole is provided at the bottom of the groove 41, the lower part of the insert 36 is in a square structure, a cylindrical connecting column 42 is provided on the upper part of the insert 36, a plurality of lower inclined surfaces 43 are evenly distributed circumferentially on the end surface of the connecting column 42, a convex ring is provided on the inner wall of the through hole, an upper inclined surface 44 is provided on the lower end surface of the convex ring corresponding to the lower inclined surface 43, and the space between the lower inclined surface 43 and the upper inclined surface 44 forms a lifting groove 24. The connecting column 42 on the upper part of the insert 36 is adapted to be connected with the through hole, and the lower part of the insert 36 is adapted to be connected with the groove 41 to realize the circumferential locking of the insert 36 and the lower column 35. A through hole 45 is provided on the insert 36, and the lower part of the mold core 3 passes through the through hole 45.

[0056] The upper cylinder 33 and the middle cylinder 34 are both provided with driving grooves 22 on their upper surfaces. Avoidance grooves 46 are provided on their upper surfaces corresponding to the driving grooves 22. The avoidance grooves 46 are connected between the driving grooves 22 and the inner wall of the rotating cylinder 2. The positioning clamp rod 20 passes through the avoidance grooves 46. The avoidance grooves 46 can prevent the rotating cylinder 2 from interfering with the positioning clamp rod 20 during rotation. The inner end surface of the positioning clamp rod 20 is adapted to the outer wall of the product.

[0057] When the rotor is overmolded, the rotor insert 8 and the plastic positioning ring 12 are first loaded into the cavity 4, and then the rack 31 is moved, and the transmission connection between the rack 31 and the meshing teeth 32 drives the rotating column 2 to rotate, and the lifting groove 24 on the rotating column 2 pushes the support rod 18 to move upward, and the driving groove 22 on the rotating column 2 pushes the positioning clamp rod 20 to move radially inward, and the support rod 18 moves upward to the position to support the rotor insert 8. At the same time, the end of the positioning clamp rod 20 is close to the outer wall of the rotor insert 8, so as to realize the circumferential positioning of the rotor insert 8 and position the rotor insert 8 to the center. At this time, the rotor insert 8 is accurately positioned, and the positioning rib 13 on the plastic positioning ring 12 supports the upper end surface of the rotor insert 8. There is a gap between the lower end of the rotor insert 8 and the bottom of the cavity 4, a gap between the outer wall of the rotor insert 8 and the inner wall of the cavity 4, and a gap between the inner wall of the rotor insert 8 and the outer wall of the shaft core 9. After that, plastic raw materials are injected into the mold cavity 4 through the pouring port 26 set at the lower end of the mold core 3. When two-thirds of the volume is injected, the end of the positioning clamp rod 20 exposed in the mold cavity 4 is covered by plastic. At this time, the rack 31 is moved in the opposite direction, the rotating column 2 rotates in the opposite direction, and the support rod 18 moves downward to be in place and thus detached from the rotor insert 8. At the same time, the positioning clamp rod 20 moves in a direction away from the outer wall of the rotor insert 8. The end of the positioning clamp rod 20 detaches from the rotor insert 8 to the inner wall of the mold cavity 4, and the plastic raw materials are continuously injected into the mold cavity 4. After the plastic positioning ring 12 is coated with the plastic raw materials, the electric heating wire 14 is energized to work, and the plastic positioning ring 12 is heated to soften it and mixed with the injected plastic raw materials until the plastic raw materials fill the product. Finally, the ejector pushes the product out and enters the next injection molding cycle.

[0058] After a certain amount of injection molding is completed in the cavity 4, the rotor insert 8 has been surrounded by the plastic raw material and is positioned. At this time, the support rod 18 and the positioning clamp rod 20 are removed, and then the plastic raw material is continued to be injected. Before the plastic positioning ring 12 is not covered by the plastic raw material, the plastic positioning ring 12 plays an axial positioning role on the rotor insert 8. During the axial injection of the plastic raw material, the axial deviation of the rotor insert 8 is prevented. After the plastic positioning ring 12 is covered by the plastic raw material, the heating wire 14 is energized to heat the plastic positioning ring 12 to soften it and mix it with the injected plastic raw material. During the process of continuing to inject the plastic raw material, the position of the rotor insert 8 remains unchanged, thereby ensuring the accuracy of the injection molding position of the rotor insert 8.

[0059] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A rotor overmolding mold, characterized in that: The mold body comprises a mold body, a rotating column and a mold core are arranged in the mold body, a mold cavity is arranged in the mold core, a rotor insert is loaded in the mold cavity, a supporting assembly and a plurality of positioning assemblies arranged at intervals are installed on the mold core, the supporting assembly comprises a plurality of supporting rods, the supporting rods are supported on the ends of the rotor inserts, the positioning assembly comprises a plurality of positioning clamping rods arranged at intervals in the circumferential direction, one end of the positioning clamping rod is abutted against the outer wall of the rotor insert, and the other end of the positioning clamping rod is connected to the rotating column; the rotating column rotates to drive the supporting rod and the positioning clamping rod to move.

2. A rotor overmolding mold according to claim 1, characterized in that: A guide groove corresponding to the positioning clamp rod is arranged on the mold core, the guide groove is arranged radially, and the positioning clamp rod is movably plug-in connected with the guide groove.

3. The rotor overmolding mold according to claim 1, characterized in that: A driving groove corresponding to the positioning clamp rod is arranged on the rotating column, the driving groove gradually moves away from the rotor insert from one end to the other end, and a mounting head is arranged on the positioning clamp rod, and the mounting head is movably inserted in the driving groove.

4. The rotor overmolding mold according to claim 1, characterized in that: A lifting slot corresponding to the supporting rod is arranged on the rotating column, the lifting slot is arranged obliquely, a lifting head is arranged at the lower end of the supporting rod, and the lifting head is movably inserted in the lifting slot.

5. The rotor overmolding mold according to claim 1, characterized in that: The shaft core is inserted into the cavity, the rotor insert is set on the outer periphery of the shaft core, a step surface is arranged at the lower part of the shaft core, a step hole is arranged on the mold core, and the lower part of the shaft core is adapted to be inserted into the step hole.

6. The rotor overmolding mold according to claim 1, characterized in that: The mold body is provided with an installation cavity, the rotating column is rotatably installed in the installation cavity, the mold body is connected with a limit block, the rotating column is provided with a limit groove, and the end of the limit block is movably inserted in the limit groove to limit the rotation angle of the rotating column.

7. The rotor overmolding mold according to claim 1, characterized in that: A pouring gate is arranged at the bottom of the cavity, and the pouring gate extends to the lower end surface of the mold core.

8. The rotor overmolding mold according to claim 1, characterized in that: A rack is installed on the mold body, and meshing teeth are arranged on the rotating column, and the meshing teeth mesh with the rack for transmission.

9. A rotor overmolding mold according to any one of claims 1 to 8, characterized in that: The rotating column comprises an upper column, a middle column and a lower column. The upper column and the middle column are respectively provided with a set of positioning components. The lower column is provided with an insert, and the lower end of the support rod is connected with the insert.

10. A rotor overmolding mold according to any one of claims 1 to 8, characterized in that: The mold body comprises an upper mold and a lower mold, a rotating column and a mold core are arranged in the lower mold, a mold cavity is arranged in the upper mold, and the mold cavity and the mold cavity are arranged correspondingly up and down.

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