Turnover type capacitor core rapid impregnation system

Through the flipped capacitor core rapid impregnation system, the injection and pressure relief of electrolyte in high temperature and high pressure states is used to solve the problem of incomplete impregnation in the prior art, and efficient and rapid impregnation of capacitor cores is achieved.

CN119650326APending Publication Date: 2025-03-18YIYANG HETIAN ELECTRONICS
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Patent Information

Application Number
CN202411910925.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

During the impregnation process, existing capacitor cores have problems with contacting the ends of adjacent cores and inserting pins, resulting in the inability to fully enter the electrolyte or incomplete impregnation.

Method used

The flip capacitor core rapid immersion system is adopted. Through the conveying disk, grabbing unit, flip motor and lifting cylinder, the core clamp flips and the electrolyte injection and pressure relief of the impregnation box under high temperature and high pressure state, ensuring that the core is fully impregnated.

Benefits of technology

The problems of end contact between cores and pin insertion are solved, the full entry and efficient impregnation of the electrolyte are achieved, the impregnation quality and speed are improved, and the preparation time of the capacitor is shortened.

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Abstract

The invention provides a turnover type capacitor core rapid impregnation system which comprises a core conveying disc, a core guide plate is installed at an outlet of the core conveying disc, an outlet of the core guide plate is connected with a core discharging guide plate in a rack, an impregnation table is installed in the rack on one side of the core discharging guide plate, a synchronous guide rail is installed on the top of the impregnation table, and a motor is installed on the synchronous guide rail. The synchronous guide rail is parallel to the core arranging guide plate and movably provided with a synchronous seat, the top of the synchronous seat is vertically provided with a lifting cylinder, and the top of the lifting cylinder is provided with a dipping unit; a core pushing unit is mounted on the rack between the dipping unit and the core discharging guide plate; a discharging guide plate is mounted on the rack on the other side of the dipping unit, a transfer guide rail is mounted at the top of an inner cavity of the rack, the transfer guide rail and the core arranging guide plate are in a cross shape in an overlook manner, a grabbing unit is movably mounted on the transfer guide rail, a turnover motor is mounted on the rack below the grabbing unit, and a core assembly is mounted on a transmission shaft of the turnover motor. After the scheme is adopted, the structure is reasonable, the using effect is good, and the dipping speed is high.
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Description

Technical Field

[0001] The invention relates to the technical field of capacitor production, in particular to a flip-type capacitor core rapid impregnation system. Background Art

[0002] The impregnating agent of the capacitor is an insulating liquid and is the main material for producing capacitors. As a liquid insulating medium, it fills the gaps between solid media and improves the insulation strength. The performance of this structure under high electric fields determines the life of the capacitor. Currently, most capacitor cores are impregnated through an impregnation kettle. During the impregnation, the core is poured into the impregnation frame, and the impregnation frame is placed in the impregnation kettle, and then pressurized for impregnation. Since the cores are accumulated in the impregnation frame, this method of impregnation will have the following problems: First, there will be end contact between adjacent cores, resulting in the electrolyte being unable to enter the core or the amount entering is too small, and the impregnation quality cannot be guaranteed; second, the core pins are often inserted into another core, resulting in the inserted core part being unable to be impregnated. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a flip capacitor core rapid impregnation system with reasonable structure and good use effect.

[0004] To achieve the above object, the technical solution provided by the present invention is: a quick impregnation system for a flip-type capacitor core, the preparation system comprising the following steps: The first step: the conveyor plate vibrates and feeds the electronic device cores to be arranged on the core arrangement guide plate in sequence through the core guide plate; The second step: the grabbing unit grabs the core and sends it to the core clamping plate on the core supporting plate until all the core clamping plates are filled; The third step: the turning motor drives the core clamp to turn 180 degrees, so that the core body of the core faces downward; Step 4: The lifting cylinder pushes the impregnation box upward to contact the bottom of the core support plate, so that the core clamping plate and the core are located in the impregnation box; Step 5: injecting electrolyte into the impregnation box, heating the electrolyte in the impregnation box, and continuously injecting electrolyte to make the pressure in the impregnation box reach a set value, so that a high temperature and high pressure state is formed in the impregnation box; Step 6: After the core is impregnated, the impregnation tank is depressurized to return the electrolyte to the liquid storage tank. After the remaining liquid on the core drips off, the turning motor drives the core clamp to turn 180 degrees; Step 7: Take out the capacitor core after dipping.

[0005] The grabbing seat in the grabbing unit of the second step is driven by the corresponding motor to move up the transfer guide rail to above the core of the core row guide plate, the piston rod of the grabbing cylinder is extended to drive the grabbing plate to descend, the steering motor is rotated to make the length direction of the grabbing clamping plate consistent with the length direction of the core row guide plate, the piston rod of the grabbing bidirectional cylinder is extended to drive the two grabbing clamping plates to move relatively apart, forming a core clamping area, and the core is clamped in the clamping area.

[0006] In the third step, the piston rod of the grabbing cylinder extends to drive the grabbing plate to descend. During the descent process, the steering motor rotates to rotate the grabbing splint 90 degrees, so that the length direction of the grabbing splint is consistent with the long direction of the core splint. The piston rod of the grabbing cylinder continues to extend to drive the grabbing plate to descend, so that the pins of the core are inserted into the core splint; the piston rod of the grabbing bidirectional cylinder extends to drive the two grabbing splints to move relatively away from each other to release the core; the action is repeated until all core splints are filled.

[0007] The invention comprises a core conveying tray, a core guide plate is installed at the outlet of the core conveying tray, wherein the outlet of the core guide plate is connected to the core row guide plate in the frame, an impregnation table is installed in the frame on one side of the core row guide plate, a synchronous guide rail is installed on the top of the impregnation table, the synchronous guide rail is parallel to the core row guide plate, a synchronous seat is movably installed on the synchronous guide rail, a lifting cylinder is vertically installed on the top of the synchronous seat, and an impregnation unit is installed on the top of the lifting cylinder; a core pushing unit is installed on the frame between the impregnation unit and the core row guide plate; a discharging guide plate is installed on the frame on the other side of the impregnation unit, a transfer guide rail is installed on the top of the frame inner cavity, the transfer guide rail and the core row guide plate are in a "cross" shape when viewed from above, a grabbing unit is movably installed on the transfer guide rail, a flip motor is installed on the frame below the grabbing unit, and a core assembly is installed on the drive shaft of the flip motor.

[0008] The core pushing unit includes a core pushing guide rail, a positioning splint, and a core pushing slider, wherein both ends of the core pushing guide rail are fixed in the frame by corresponding fixed support plates, and the installed core pushing guide rail is parallel to the core row guide plate, and a transmission screw is installed between the two fixed support plates on one side of the core pushing guide rail, and a screw motor is installed on the outer side of one of the fixed support plates, and the transmission shaft of the screw motor is connected to the transmission screw, and a guide hole is provided on the upper part of one side of the core pushing slider, and the guide hole is sleeved with the core pushing guide rail, and a transmission hole is provided on the lower part of the other side of the core pushing slider, and the transmission hole is meshed with the transmission screw, and a core pushing bidirectional cylinder is installed on the top of the core pushing slider, and there are two positioning splints, and the positioning splints are respectively installed on the two piston rods of the core pushing bidirectional cylinder.

[0009] The grabbing unit includes a grabbing seat, a grabbing cylinder, and a grabbing splint, wherein the grabbing seat is movably installed on the transfer guide rail and is driven by a corresponding motor to move on the transfer guide rail. A grabbing cylinder is installed at the bottom of the grabbing seat, and the piston rod of the grabbing cylinder is vertically downwardly connected to the grabbing plate. A steering motor is installed on the grabbing plate, and the transmission shaft of the steering motor is downwardly connected to the cylinder body of the grabbing bidirectional cylinder. A grabbing splint is installed on each of the two piston rods of the grabbing bidirectional cylinder, and a core clamping area is formed between the two grabbing splints.

[0010] The core assembly includes a core support plate, a core clamping plate, and a core pushing slider, wherein the core pushing sliders are two parallel ones, which are movably mounted on corresponding core support rails respectively, the core support rails are connected to the end of the transmission shaft of the flip motor, a core support plate is fixed on the top and bottom of each of the core pushing sliders, and more than 2 groups of core clamping plates are installed on the surface of the core support plate, and a positioning support rod is horizontally fixed on the outer side wall of the core pushing slider, and the positioning support rod is located between the two positioning clamping plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 For the present invention Figure 1 Enlarged view of point A. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with all the accompanying drawings. The preferred embodiments of the present invention are as follows: Figure 1 And attached Figure 2 The invention relates to a quick impregnation system for a flip capacitor core in this embodiment, wherein the preparation system comprises the following steps: The first step: the conveyor plate vibrates and feeds the electronic device cores to be arranged on the core arrangement guide plate in sequence through the core guide plate; The second step: the grabbing unit grabs the core and sends it to the core clamping plate on the core supporting plate until all the core clamping plates are filled; The third step: the turning motor drives the core clamp to turn 180 degrees, so that the core body of the core faces downward; Step 4: The lifting cylinder pushes the impregnation box upward to contact the bottom of the core support plate, so that the core clamping plate and the core are located in the impregnation box; Step 5: injecting electrolyte into the impregnation box, heating the electrolyte in the impregnation box, and continuously injecting electrolyte to make the pressure in the impregnation box reach a set value, so that a high temperature and high pressure state is formed in the impregnation box; Step 6: After the core is impregnated, the impregnation tank is depressurized to return the electrolyte to the liquid storage tank. After the remaining liquid on the core drips off, the turning motor drives the core clamp to turn 180 degrees; Step 7: Take out the capacitor core after dipping.

[0014] The grabbing seat in the grabbing unit of the second step is driven by the corresponding motor to move up the transfer guide rail to above the core of the core row guide plate, the piston rod of the grabbing cylinder is extended to drive the grabbing plate to descend, the steering motor is rotated to make the length direction of the grabbing clamping plate consistent with the length direction of the core row guide plate, the piston rod of the grabbing bidirectional cylinder is extended to drive the two grabbing clamping plates to move relatively apart, forming a core clamping area, and the core is clamped in the clamping area.

[0015] In the third step, the piston rod of the grabbing cylinder extends to drive the grabbing plate to descend. During the descent process, the steering motor rotates to rotate the grabbing splint 90 degrees, so that the length direction of the grabbing splint is consistent with the long direction of the core splint. The piston rod of the grabbing cylinder continues to extend to drive the grabbing plate to descend, so that the pins of the core are inserted into the core splint; the piston rod of the grabbing bidirectional cylinder extends to drive the two grabbing splints to move relatively away from each other to release the core; the action is repeated until all core splints are filled.

[0016] It includes a core conveying tray 1, at the outlet of the core conveying tray 1 is installed a core guide plate 2, wherein the outlet of the core guide plate 2 is connected to the core row guide plate 4 in the frame 3, a dipping table 5 is installed in the frame 3 on one side of the core row guide plate 4, a synchronous guide rail is installed on the top of the dipping table 5, the synchronous guide rail is parallel to the core row guide plate 4, a synchronous seat is movably installed on the synchronous guide rail, a lifting cylinder 6 is vertically installed on the top of the synchronous seat, and a dipping unit is installed on the top of the lifting cylinder 6; a core pushing unit is installed on the frame 3 between the dipping unit and the core row guide plate 4; a discharging guide plate 7 is installed on the frame 3 on the other side of the dipping unit, a transfer guide rail 11 is installed on the top of the inner cavity of the frame 3, the transfer guide rail 11 and the core row guide plate 4 are in a "cross" shape when viewed from above, a grabbing unit is movably installed on the transfer guide rail 11, a flip motor is installed on the frame below the grabbing unit, and a core assembly is installed on the drive shaft of the flip motor.

[0017] The core pushing unit includes a core pushing guide rail 8, a positioning clamp plate 9, and a core pushing slider 27, wherein both ends of the core pushing guide rail 8 are fixed in the frame 3 by corresponding fixed support plates. After installation, the core pushing guide rail 8 is parallel to the core row guide plate 4. A transmission screw 10 is installed between the two fixed support plates on one side of the core pushing guide rail 8. A screw motor is installed on the outer side of one of the fixed support plates, and the transmission shaft of the screw motor is connected to the transmission screw 10. A guide hole is provided on the upper part of one side of the core pushing slider 27, and the guide hole is sleeved with the core pushing guide rail 8. A transmission hole is provided on the lower part of the other side of the core pushing slider 27, and the transmission hole is meshed with the transmission screw 10. A core pushing bidirectional cylinder is installed on the top of the core pushing slider 27. There are two positioning clamp plates 9, and the positioning clamp plates 9 are respectively installed on the two piston rods of the core pushing bidirectional cylinder. The grabbing unit includes a grabbing seat 12, a grabbing cylinder 13, and a grabbing splint 14, wherein the grabbing seat 12 is movably installed on the transfer guide rail 11, and is driven by a corresponding motor to move on the transfer guide rail 11, a grabbing cylinder 13 is installed at the bottom of the grabbing seat 12, the piston rod of the grabbing cylinder 13 is vertically downwardly connected to the grabbing plate 15, a steering motor 16 is installed on the grabbing plate 15, the transmission shaft of the steering motor 16 is downwardly connected to the cylinder body of the grabbing bidirectional cylinder 17, a grabbing splint 14 is installed on each of the two piston rods of the grabbing bidirectional cylinder 17, and a core clamping area is formed between the two grabbing splints 14. The core assembly includes a core support plate 28, a core clamping plate 24, and a core pushing slider 25, wherein the core pushing sliders 25 are two parallel ones, which are movably mounted on the corresponding core support rails 22 respectively, and the core support rails 22 are connected to the end of the transmission shaft of the flip motor. A core support plate 28 is fixed on the top and bottom of the core pushing slider 25, and more than 2 groups of core clamping plates 24 are installed on the surface of the core support plate 28. A positioning support rod 26 is horizontally fixed on the outer side wall of the core pushing slider 25, and the positioning support rod 26 is located between the two positioning clamping plates 9.

[0018] After adopting the above scheme, the piston rod of the lifting cylinder in the original state is in an extended state, so that the core support plate at the bottom of the core support rail covers the top of the impregnation box, and the core clamping plate at the bottom of the core support plate is located in the impregnation box; The core conveyor plate vibrates, and the cores are arranged on the core row guide plate in sequence through the core guide plate. The grabbing seat is driven by the corresponding motor to move up the transfer guide rail to the top of the core on the core row guide plate. The piston rod of the grabbing cylinder extends to drive the grabbing plate to descend. The steering motor rotates to make the length direction of the grabbing splint consistent with the length direction of the core row guide plate. The piston rod of the grabbing two-way cylinder extends to drive the two grabbing splints to move relatively apart to form a core clamping area; the piston rod of the grabbing cylinder drives the grabbing plate to continue to descend to make the core (core body) enter the clamping area, and the piston rod of the grabbing two-way cylinder contracts to drive the two grabbing splints to move relatively close to clamp the core (core body), and the piston rod of the grabbing cylinder drives the grabbing plate to rise to make the grabbed core away from the core row guide plate, and the grabbing seat is driven by the corresponding motor to move up the transfer guide rail to the top of the core support plate on the top of the core push slider; The two positioning clamps in the original state are relatively far away from each other and do not contact the positioning support rod, so as to facilitate the flipping of the core assembly. When the core moves to the top of the core support plate, the piston rod of the core-pushing bidirectional cylinder contracts and drives the two positioning clamps to move relatively close to clamp the positioning support rod; the screw motor drives the transmission screw to rotate, and the transmission screw drives the core-pushing slider to move during the rotation process, and the core-pushing slider drives the core support plate to move on the core support rail, so that the empty core clamp at the end is located below the core; The piston rod of the grabbing cylinder extends to drive the grabbing plate to descend. During the descent, the steering motor rotates to rotate the grabbing splint 90 degrees, so that the length direction of the grabbing splint is consistent with the long direction of the core splint. The piston rod of the grabbing cylinder continues to extend to drive the grabbing plate to descend, so that the pins of the core are inserted into the core splint; the piston rod of the grabbing bidirectional cylinder extends to drive the two grabbing splints to move relatively away from each other to release the core (core body); The piston rod of the grabbing cylinder contracts to drive the grabbing plate to rise and repeatedly grab the core. At the same time, the screw motor drives the transmission screw to rotate, so that the core clamping plate moves one station (the impregnation box, liquid storage tank, etc. move synchronously on the synchronous guide rail); when all the core clamping plates on the core support plate on the top of the core pushing slider are full, the piston rod of the core pushing bidirectional cylinder extends to drive the two positioning clamping plates to move relatively away from each other to loosen the positioning support rod; at the same time, the piston rod of the lifting cylinder contracts to drive the impregnation box, liquid storage tank and other components to descend and away from the core support plate (reserving space for the core support plate to flip); When the core clamping plate filled with cores is located at the bottom of the core supporting rail, the piston rod of the lifting cylinder extends to drive the impregnation box, liquid storage tank and other components to rise, the top of the impregnation box contacts the bottom of the core supporting plate at the bottom of the core supporting rail to form a seal, and the core clamping plate with cores at the bottom of the core supporting plate is located in the impregnation box; The liquid guide tube delivers the electrolyte in the liquid storage tank into the impregnation tank. When the electrolyte completely covers the core body of the core, the liquid control valve on the liquid guide tube is closed, and the heating plate continues to heat at the same time, so that the electrolyte is quickly impregnated into the core body of the core to complete the impregnation of the capacitor core. This solution uses high temperature and high pressure for impregnation, and its impregnation speed is extremely fast, which can greatly shorten the preparation time of the capacitor. Moreover, the core end will not be blocked during impregnation, and the impregnation effect is good. After impregnation, the residual liquid is directly filtered out in the impregnation tank, and after impregnation, it is directly grabbed and entered into the next process. It is impossible to vibrate and discharge the material again, saving site and equipment space.

[0019] After the present invention adopts the above scheme, the core conveying plate vibrates, and the cores are arranged on the core row guide plate in sequence through the core guide plate. The grabbing unit grabs the core row guide plate and arranges it into the core assembly on the surface of the core support plate through the transfer guide rail. During the process of discharging, the core assembly is moved by the core pushing unit so that the cores fill the entire core assembly. After it is full, the flip motor in the impregnation unit drives the core support plate to flip, and the core assembly filled with cores flips downward into the impregnation box, and the electrolyte is injected into the impregnation box through the liquid guide tube to impregnate the core. The structure after adopting this scheme is reasonable, the use effect is good, and the impregnation speed is fast.

Claims

1. A quick impregnation system for a flip capacitor core, characterized in that: The preparation system comprises the following steps: The first step: the conveyor plate vibrates and feeds the electronic device cores to be arranged on the core arrangement guide plate in sequence through the core guide plate; The second step: the grabbing unit grabs the core and sends it to the core clamping plate on the core supporting plate until all the core clamping plates are filled; The third step: the turning motor drives the core clamp to turn 180 degrees, so that the core body faces downward; Step 4: The lifting cylinder pushes the impregnation box upward to contact the bottom of the core support plate, so that the core clamping plate and the core are located in the impregnation box; Step 5: injecting electrolyte into the impregnation box, heating the electrolyte in the impregnation box, and continuously injecting electrolyte to make the pressure in the impregnation box reach a set value, so that a high temperature and high pressure state is formed in the impregnation box; Step 6: After the core is impregnated, the impregnation tank is depressurized to return the electrolyte to the liquid storage tank. After the remaining liquid on the core drips off, the turning motor drives the core clamp to turn 180 degrees; Step 7: Take out the capacitor core after dipping.

2. The quick impregnation system for a flip capacitor core according to claim 1, characterized in that: The grabbing seat in the grabbing unit of the second step is driven by the corresponding motor to move up the transfer guide rail to above the core of the core row guide plate, the piston rod of the grabbing cylinder is extended to drive the grabbing plate to descend, the steering motor is rotated to make the length direction of the grabbing clamping plate consistent with the length direction of the core row guide plate, the piston rod of the grabbing bidirectional cylinder is extended to drive the two grabbing clamping plates to move relatively apart, forming a core clamping area, and the core is clamped in the clamping area.

3. The quick impregnation system for a flip capacitor core according to claim 1, characterized in that: In the third step, the piston rod of the grabbing cylinder extends to drive the grabbing plate to descend. During the descent process, the steering motor rotates to rotate the grabbing splint 90 degrees, so that the length direction of the grabbing splint is consistent with the long direction of the core splint. The piston rod of the grabbing cylinder continues to extend to drive the grabbing plate to descend, so that the pins of the core are inserted into the core splint; the piston rod of the grabbing bidirectional cylinder extends to drive the two grabbing splints to move relatively away from each other to release the core; the action is repeated until all core splints are filled.

4. The quick impregnation system for a flip capacitor core according to claim 1, characterized in that: It comprises a core conveying tray (1), a core guide plate (2) is installed at the outlet of the core conveying tray (1), wherein the outlet of the core guide plate (2) is connected to a core row guide plate (4) in a frame (3), a dipping table (5) is installed in the frame (3) on one side of the core row guide plate (4), a synchronous guide rail is installed on the top of the dipping table (5), the synchronous guide rail is parallel to the core row guide plate (4), a synchronous seat is movably installed on the synchronous guide rail, a lifting cylinder (6) is vertically installed on the top of the synchronous seat, and the lifting cylinder (6) is installed on the top of the lifting cylinder (6). An impregnation unit is installed on the frame (3); a core pushing unit is installed on the frame (3) between the impregnation unit and the core row guide plate (4); a discharge guide plate (7) is installed on the frame (3) on the other side of the impregnation unit, a transfer guide rail (11) is installed on the top of the inner cavity of the frame (3), the transfer guide rail (11) and the core row guide plate (4) are in a "cross" shape when viewed from above, a grabbing unit is movably installed on the transfer guide rail (11), a turning motor is installed on the frame below the grabbing unit, and a core assembly is installed on the transmission shaft of the turning motor.

5. The quick impregnation system for a flip capacitor core according to claim 4, characterized in that: The core pushing unit comprises a core pushing guide rail (8), a positioning clamp plate (9), and a core pushing slider (27), wherein both ends of the core pushing guide rail (8) are fixed in the frame (3) through corresponding fixed support plates, and the core pushing guide rail (8) is parallel to the core row guide plate (4) after installation, a transmission screw (10) is installed between two fixed support plates on one side of the core pushing guide rail (8), a screw motor is installed on the outer side of one of the fixed support plates, and the transmission shaft of the screw motor is connected to the transmission screw (10), a guide hole is provided on the upper part of one side of the core pushing slider (27), and the guide hole is sleeved with the core pushing guide rail (8), and a transmission hole is provided on the lower part of the other side of the core pushing slider (27), and the transmission hole is meshed with the transmission screw (10), and a core pushing bidirectional cylinder is installed on the top of the core pushing slider (27), and there are two positioning clamp plates (9), and the positioning clamp plates (9) are respectively installed on the two piston rods of the core pushing bidirectional cylinder.

6. The quick impregnation system for a flip capacitor core according to claim 4, characterized in that: The grabbing unit comprises a grabbing seat (12), a grabbing cylinder (13), and a grabbing clamping plate (14), wherein the grabbing seat (12) is movably mounted on the transfer guide rail (11) and driven by a corresponding motor to move on the transfer guide rail (11), a grabbing cylinder (13) is mounted at the bottom of the grabbing seat (12), a piston rod of the grabbing cylinder (13) is vertically downwardly connected to a grabbing plate (15), a steering motor (16) is mounted on the grabbing plate (15), a transmission shaft of the steering motor (16) is downwardly connected to a cylinder body of a grabbing bidirectional cylinder (17), two piston rods of the grabbing bidirectional cylinder (17) are each mounted with a grabbing clamping plate (14), and a core clamping area is formed between the two grabbing clamping plates (14).

7. The aluminum electrolytic capacitor core impregnation preparation system according to claim 4, characterized in that: The core assembly comprises a core support plate (28), a core clamping plate (24), and a core pushing slider (25), wherein the core pushing sliders (25) are two parallel sliders, which are respectively movably mounted on corresponding core support rails (22), the core support rails (22) are connected to the end of the transmission shaft of the flip motor, a core support plate (28) is fixed on the top and bottom of the core pushing slider (25), more than two groups of core clamping plates (24) are installed on the surface of the core support plate (28), and a positioning support rod (26) is horizontally fixed on the outer side wall of the core pushing slider (25), and the positioning support rod (26) is located between the two positioning clamping plates (9).