A swaging die for in-mold riveting a male contact

Abstract

This utility model relates to a riveting die for in-mold riveting of moving contacts, including an upper die and a lower die. The lower die includes a main module, which is provided with a first feeding track for conveying a material strip, a second feeding track for conveying contact parts, and a pre-riveting station. The outlet end of the second feeding track is connected to the pre-riveting station. The first feeding track includes an infeed section, a working section, and an outlet section. The infeed section and the outlet section are respectively located on both sides of the pre-riveting station. The working section is arranged vertically with the pre-riveting station. A first slider is provided below the main module. A first top block is provided between the first slider and the main module. The first top block is located at the pre-riveting station. A first movable groove is provided on the first slider corresponding to the position of the first top block. The first movable groove includes a first driving inclined surface. A first mating inclined surface is provided at the lower end of the first top block. A driving cutter for driving the first slider to slide is provided between the upper die and the lower die. A punch is provided in the upper die corresponding to the position of the pre-riveting station.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker component processing technology, specifically to a riveting mold for in-mold riveting of moving contacts. Background Technology

[0002] The moving contact assembly is a component used in circuit breakers. The moving contact consists of a component and two contacts, with the contacts riveted to both ends of the component. Current processing methods involve separately molding the component and contacts, then manually loading and riveting them one by one, which is time-consuming. This process is costly and difficult, directly impacting product delivery cycles. Utility Model Content

[0003] In summary, to overcome the shortcomings of the prior art, this utility model provides a riveting mold for in-mold riveting contact points.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a riveting die for in-mold riveting of moving contacts, comprising an upper die and a lower die, the lower die comprising a main module, the main module being provided with a first feeding track for conveying a material strip, a second feeding track for conveying contact components, and a pre-riveting station for pre-riveting the contact components to the material strip, the outlet end of the second feeding track being connected to the pre-riveting station, the first feeding track comprising an infeed section, a working section, and an outlet section, the infeed section and the outlet section being respectively disposed on both sides of the pre-riveting station, the working section being disposed vertically with respect to the pre-riveting station, and a pre-riveting station being disposed below the main module. A first slider is provided, and a first top block is provided between the first slider and the main module for moving the contact component upwards toward the material strip. The first top block is located at the pre-riveting station. A first movable groove is provided on the first slider corresponding to the position of the first top block. The first movable groove includes a first driving inclined surface for moving the first top block up and down. A first mating inclined surface is provided at the lower end of the first top block to cooperate with the first driving inclined surface. A driving insert is provided between the upper mold and the lower mold for driving the first slider to slide. A punch is provided in the upper mold corresponding to the position of the pre-riveting station for pre-riveting the contact component to the material strip.

[0005] By adopting the above technical solution, in-mold riveting moving contacts are used, eliminating the need for individual riveting. Instead, moving contacts are riveted separately at both ends of the strip within the mold, eliminating the need for manual feeding and riveting. This increases efficiency from 40 pieces per minute to 260-320 pieces per minute, a 6-8 times improvement, significantly enhancing efficiency and accuracy. The first and second feeding tracks are vertically positioned for separate feeding, and the mold's spatial distribution is rationally designed. The upper mold presses down, driving the insert cutter downwards, which in turn moves the first slider forward. The forward movement of the first slider drives the first top block upwards, causing the moving contacts to move towards the strip and enter the strip's mounting hole, where they engage with the strip to achieve pre-riveting. The operation is simple and highly efficient.

[0006] The present invention further comprises: the first slider is disposed in the bottom module, the bottom module is provided with a first sliding groove for the first slider to slide, and the bottom module is provided with a reset spring on the other side opposite to the driving insert for driving the first slider to reset.

[0007] By adopting the above technical solution, when the upper mold presses down, it drives the drive inserter to move down, thereby driving the first slider to move forward. When the upper mold loses the downward pressure, the reset spring returns from the compressed state, driving the first slider to move backward and reset. The first slider moving backward and reset drives the drive inserter to move upward and reset, while driving the first top block to fall back and move down to the bottom of the first movable groove, so that the second feeding track can send the next contact part into the pre-riveting station.

[0008] The present invention further includes: a limiting cover plate for limiting contact components at the pre-riveting station; a limiting groove for limiting a single contact component at one end of the limiting cover plate corresponding to the second feeding track; and a drag block for driving the limiting cover plate to move back and forth at the other end of the limiting cover plate.

[0009] By adopting the above technical solution, a limiting cover plate is set to limit the single contact component set on the pre-riveting station. The limiting groove prevents the contact component from moving back and forth or left and right. The first top block limits the vertical displacement of the contact component. After the contact component is initially engaged with the material strip, the limiting cover plate is moved backward by the drag block. Then the first top block is pushed up further, so that the contact component and the material strip complete the initial pre-riveting.

[0010] The present invention further comprises: a second sliding groove is provided at the position of the drag block corresponding to the driving insert, and a second driving inclined surface is provided on the other side of the driving insert relative to the limiting cover plate for driving the drag block to move back and forth. The inner wall of the second sliding groove is provided with a second mating inclined surface that cooperates with the second driving inclined surface. When the driving insert moves down, the drag block moves backward along the second driving inclined surface, driving the limiting cover plate away from the pre-riveting position. When the driving insert moves up, the drag block moves forward along the second driving inclined surface to reset, driving the front end of the limiting cover plate to abut against the outlet end of the second feeding track.

[0011] By adopting the above technical solution, the first top block can be moved up and down by controlling the drive inserter, while the drag block can be moved back and forth to control the detachment and reset of the limit cover. The operation is simple, the process is synchronous, the efficiency is high, the structure is simplified, and the operating cost is reduced.

[0012] The present invention further comprises: a third sliding groove is provided at one end of the drag block corresponding to the limiting cover plate; a second slider is provided in the third sliding groove and moves up and down along the third sliding groove; the front end of the second slider is provided outside the third sliding groove and connected to the limiting cover plate; a second top block is provided below the second slider for driving the second slider to move up and down; a second movable groove is provided at the position of the first slider corresponding to the position of the second top block; the second movable groove includes a third driving inclined surface for driving the second top block to move up and down; and a third mating inclined surface is provided at the lower end of the second top block to cooperate with the third driving inclined surface.

[0013] By adopting the above technical solution, the second slider that moves up and down connects the drag block and the limiting cover plate, so that the limiting cover plate can move up and down with the first top block through the cooperation of the second top block, further ensuring the stability of the upper and lower limit of the contact component, ensuring that the contact component does not deviate before the limiting cover plate leaves the pre-riveting station to complete the pre-riveting process, and further improving the accuracy of pre-riveting.

[0014] This utility model further includes the following configuration: a fourth mating inclined surface is provided at one end of the first slider corresponding to the driving insert; the driving insert at one end corresponding to the fourth driving inclined surface is provided with a stepped fourth driving inclined surface, a first connecting surface, a fifth driving inclined surface, and a second connecting surface. When the driving insert is in its initial position, the fourth driving inclined surface and the fourth mating inclined surface are in contact. When the driving insert continues to move downward, the first connecting surface is in contact with the rear end face of the first slider, and the first and second top blocks initially push upward to engage the contact element with the material strip. When the driving insert moves downward until the fifth driving inclined surface and the fourth mating inclined surface are in contact, the limiting cover plate disengages from the pre-riveting position. When the driving insert continues to move downward, the second connecting surface is in contact with the rear end face of the first slider, and the first top block continues to push upward to further engage the contact element with the material strip. At the same time, the punch presses down to engage with the first top block to achieve pre-riveting, while the height of the second top block remains unchanged.

[0015] By adopting the above technical solution, when the upper mold drives the cutting tool to press down, it drives the first slider and the drag block to go through three processes: initial lifting, the limit cover plate retracting, and secondary lifting (in conjunction with the punch to achieve pre-riveting). The operation is simple, and the first lifting block, the second lifting block and the drag block are automatically in place. It is convenient to use and has high stability.

[0016] The present invention further comprises: the contact element includes a protrusion and an insertion portion; a row of mounting holes for inserting the contact element is provided at both ends of the material strip; the diameter of the mounting holes is adapted to the diameter of the insertion portion; the spacing between the mounting holes in the same row is equal; there are two second feeding tracks; the spacing between the two second feeding tracks is adapted to the spacing between the mounting holes of the material strip; the discharge end of the second feeding track near the feeding section is aligned with the mounting hole at the other end of the material strip opposite to the second feeding track; and the discharge end of the second feeding track near the discharge section is aligned with the mounting hole at the end of the material strip corresponding to the second feeding track.

[0017] By adopting the above technical solution, two second feeding tracks are set up, and the contact parts and material strips are pre-riveted to the mounting holes at both ends respectively. The pre-riveting at both ends is staggered. The pre-riveting station includes two pre-riveting points. The first top block consists of two staggered top parts, which are pre-riveted to the two pre-riveting points respectively. That is, one top part is aligned with the mounting hole of the rear row, and the other top part is aligned with the adjacent mounting hole of the front row (at this time, the corresponding mounting hole of the rear row has been pre-riveted in the previous pre-riveting). The staggered pre-riveting improves the pre-riveting efficiency. Compared with the synchronous pre-riveting at both ends, the staggered pre-riveting makes a significant improvement in the spatial structure design, greatly saves volume, and makes it more convenient to operate and feed. At the same time, it facilitates the movement of the drive blade and the limiting cover plate. The limiting cover plate includes two staggered limiting grooves, which are respectively set to correspond to the discharge end of the second feeding track.

[0018] This utility model further includes: a precision riveting station and a leak detection station at the position corresponding to the discharge section of the main module; a precision riveting assembly for further riveting the contact element to the material strip is provided below the precision riveting station; a leak detection assembly is provided below the leak detection station; the leak detection assembly includes a hollow nylon sleeve and a metal push rod for communicating with the contact point; one end of the metal push rod is located inside the nylon sleeve, and the other end passes through the nylon sleeve and is located below the contact element; a limiting element is provided at the bottom of the nylon sleeve; a spring is provided between the limiting element and the metal push rod; and the spring is connected to an electrical wire.

[0019] By adopting the above technical solution, after pre-riveting, the contact parts and the material strip are further precision riveted. Compared with the first and second sliders driving the first and second top blocks to move upward and squeeze, the precision riveting assembly applies more force, resulting in stronger pressure and improved riveting effect. After passing through the precision riveting station, the material strip is inspected by the leak detection assembly to ensure that the contact parts are properly riveted and to avoid missing riveting problems. When the contact parts are properly riveted, the metal top rod connects with the contact parts, and the machine tool works normally. If there is a leak, there is no connection, and the machine tool stops.

[0020] The present invention further includes: a discharge port is provided at one end of the main module corresponding to the discharge section; a shearing station for cutting the material strip to form a finished product is provided between the leakage detection station and the discharge port; the shearing station is provided with a shearing component; and a discharge chute for discharging excess waste material is provided below the shearing station.

[0021] By adopting the above technical solution, after completing the pre-riveting, precision riveting, and leak detection processes, the strip is cut into multiple single-moving contact pieces. Excess waste is discharged through the discharge chute and then fed through the discharge port. The entire operation is simple and efficient. Compared with the existing moving contacts, which require stamping and forming first, and then manually riveting or manually riveting with mechanical assistance for each moving contact piece, the efficiency is greatly improved.

[0022] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the mold in the separated state according to an embodiment of this utility model.

[0024] Figure 2 This is a schematic diagram of the lower mold in an embodiment of the present invention.

[0025] Figure 3 This is a partial schematic diagram of the internal structure of the lower mold in an embodiment of this utility model.

[0026] Figure 4 This is a schematic diagram of the initial state of mold closing in an embodiment of this utility model.

[0027] Figure 5 This is a partial structural diagram of the initial downward movement of the upper mold in an embodiment of the present invention.

[0028] Figure 6 This is a partial structural diagram of the upper mold being further moved downwards in an embodiment of the present invention.

[0029] Figure 7 This is a partial structural diagram of the pre-riveting state in an embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of the leak detection component according to an embodiment of the present invention.

[0031] Reference numerals: 1. Upper die, 11. Punch, 2. Lower die, 21. Main module, 211. Pre-riveting station, 212. Precision riveting station, 213. Leak detection station, 214. Shearing station, 215. Discharge port, 216. Discharge groove, 22. First slider, 221. First movable groove, 2211. First driving inclined surface, 222. Second movable groove, 2221. Third driving inclined surface, 223. Fourth mating inclined surface, 23. First top block, 231. First mating inclined surface, 24. Drive insert, 241. Second drive inclined surface, 242. Fourth drive inclined surface, 243. First connecting surface, 244. Fifth drive inclined surface, 245. Second connecting surface, 25. Bottom module, 251. First sliding groove, 252. Return spring, 26. Limiting cover plate, 261. Limiting groove, 27. Dragging block, 271. Second sliding groove, 2711. Second mating inclined surface. 272. Third sliding groove, 28. Second slider, 29. Second top block, 291. Third mating inclined surface, 3. First feeding track, 31. Feeding section, 32. Working section, 33. Discharge section, 4. Second feeding track, 5. Material belt, 51. Mounting hole, 6. Contact element, 61. Protrusion, 62. Insertion part, 7. Precision riveting assembly, 8. Leakage detection assembly, 81. Nylon sleeve, 82. Metal top rod, 83. Limiting element, 84. Spring, 85. Wire. Detailed Implementation

[0032] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0033] See appendix Figure 1-8This embodiment discloses a riveting die for in-mold riveting moving contacts, including an upper die 1 and a lower die 2. The lower die 2 includes a main module 21. The main module 21 is provided with a first feeding track 3 for conveying a material strip 5, a second feeding track 4 for conveying a contact element 6, and a pre-riveting station 211 for pre-riveting the contact element 6 to the material strip 5. The outlet end of the second feeding track 4 is connected to the pre-riveting station 211. The first feeding track 3 includes an infeed section 31, a working section 32, and an outlet section 33. The infeed section 31 and the outlet section 33 are respectively located on both sides of the pre-riveting station 211. The working section 32 overlaps with the pre-riveting station 211. A first slider 22 is provided below the main module 21. A first top block 23 is provided between the upper mold 1 and the main module 21 to drive the contact element 6 to move upward toward the material strip 5. The first top block 23 is located at the pre-riveting station 211. The first slider 22 is provided with a first movable groove 221 corresponding to the position of the first top block 23. The first movable groove 221 includes a first driving inclined surface 2211 for driving the first top block 23 to move up and down. The lower end of the first top block 23 is provided with a first mating inclined surface 231 that cooperates with the first driving inclined surface 2211. A driving insert 24 for driving the first slider 22 to slide is provided between the upper mold 1 and the lower mold 2. A punch 11 for pre-riveting the contact element 6 and the material strip 5 is provided in the upper mold 1 at the position corresponding to the pre-riveting station 211.

[0034] In this embodiment, the first slider 22 is disposed within the bottom module 25, and the bottom module 25 is provided with a first sliding groove 251 for the first slider 22 to slide. On the other side of the bottom module 25 opposite to the driving insert 24, a reset spring 252 is provided to drive the first slider 22 to reset.

[0035] In this embodiment, the pre-riveting station 211 is provided with a limiting cover plate 26 for limiting the contact piece 6. One end of the limiting cover plate 26 corresponding to the second feeding track 4 is provided with a limiting groove 261 for limiting a single contact piece 6. The other end of the limiting cover plate 26 is provided with a drag block 27 for driving the limiting cover plate 26 to move back and forth.

[0036] This embodiment further includes the following configuration: a second sliding groove 271 is provided on the position of the drag block 27 corresponding to the position of the drive insert 24; a second driving inclined surface 241 is provided on the other side of the drive insert 24 relative to the limiting cover plate 26 for driving the drag block 27 to move back and forth; the inner wall of the second sliding groove 271 is provided with a second mating inclined surface 2711 that cooperates with the second driving inclined surface 241; when the drive insert 24 moves down, the drag block 27 moves back along the second driving inclined surface 241, causing the limiting cover plate 26 to move away from the pre-riveting station 211; when the drive insert 24 moves up, the drag block 27 moves forward along the second driving inclined surface 241 to reset, causing the front end of the limiting cover plate 26 to abut against the outlet end of the second feeding track 4.

[0037] This embodiment further includes the following configuration: a third sliding groove 272 is provided at one end of the drag block 27 corresponding to the limiting cover plate 26; a second slider 28 is provided in the third sliding groove 272 and moves up and down along the third sliding groove 272; the front end of the second slider 28 is located outside the third sliding groove 272 and connected to the limiting cover plate 26; a second top block 29 is provided below the second slider 28 for driving the second slider 28 to move up and down; a second movable groove 222 is provided at the position of the first slider 22 corresponding to the position of the second top block 29; the second movable groove 222 includes a third driving inclined surface 2221 for driving the second top block 29 to move up and down; and a third mating inclined surface 291 is provided at the lower end of the second top block 29 to cooperate with the third driving inclined surface 2221.

[0038] This embodiment further includes the following configuration: A fourth mating inclined surface 223 is provided at one end of the first slider 22 corresponding to the driving insert 24. The driving insert 24, at one end corresponding to the fourth driving inclined surface 242, is provided with a stepped fourth driving inclined surface 242, a first connecting surface 243, a fifth driving inclined surface 244, and a second connecting surface 245. When the driving insert 24 is in its initial position, the fourth driving inclined surface 242 and the fourth mating inclined surface 223 are in contact. As the driving insert 24 continues to move downwards, the first connecting surface 243 and the rear end face of the first slider 22... During the initial contacting process, the first top block 23 and the second top block 29 initially push upwards to engage the contact element 6 with the material strip 5. When the driving insert 24 moves downwards to engage with the fifth driving inclined surface 244 and the fourth mating inclined surface 223, the limiting cover plate 26 disengages from the pre-riveting station 211. As the driving insert 24 continues to move downwards, the second connecting surface 245 engages with the rear end face of the first slider 22. The first top block 23 continues to push upwards to further insert the contact element 6 and the material strip 5. At the same time, the punch 11 presses down to engage with the first top block 23 to achieve pre-riveting. The height of the second top block 29 remains unchanged.

[0039] This embodiment further includes the following configuration: the contact element 6 includes a protrusion 61 and an insertion portion 62. A row of mounting holes 51 for inserting the contact element 6 is provided at both ends of the material strip 5. The diameter of the mounting holes 51 is adapted to the diameter of the insertion portion 62, and the spacing between the mounting holes 51 in the same row is equal. There are two second feeding tracks 4, and the spacing between the two second feeding tracks 4 is adapted to the spacing between the mounting holes 51 of the material strip 5. The discharge end of the second feeding track 4 near the feeding section 31 is aligned with the mounting hole 51 at the other end of the material strip 5 corresponding to the second feeding track 4. The discharge end of the second feeding track 4 near the discharge section 33 is aligned with the mounting hole 51 at one end of the material strip 5 corresponding to the second feeding track 4.

[0040] This embodiment further includes the following configuration: the main module 21 is provided with a precision riveting station 212 and a leak detection station 213 at the position corresponding to the discharge section 33. Below the precision riveting station 212, there is a precision riveting assembly 7 for further riveting the contact element 6 and the material strip 5. Below the leak detection station 213, there is a leak detection assembly 8. The leak detection assembly 8 includes a hollow nylon sleeve 81 and a metal push rod 82 for communicating with the contact point. One end of the metal push rod 82 is located inside the nylon sleeve 81, and the other end passes through the nylon sleeve 81 and is located below the contact element 6. A limiting element 83 is provided at the bottom of the nylon sleeve 81. A spring 84 is provided between the limiting element 83 and the metal push rod 82. The spring 84 is connected to an electric wire 85.

[0041] In this embodiment, the following configuration is further provided: a discharge port 215 is provided at one end of the main module 21 corresponding to the discharge section 33; a shearing station 214 for shearing the material strip 5 to form a finished product is provided between the leakage detection station 213 and the discharge port 215; the shearing station 214 is provided with a shearing assembly; and a discharge chute 216 for discharging excess waste material is provided below the shearing station 214.

[0042] The "between" mentioned above does not only refer to the location or position, but also to the interaction between different parts.

[0043] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. For example, taking the first slider 22, the reset spring 252 is disposed at the front end of the first slider 22, and the drive insert 24 is disposed at the rear end of the first slider 22.

[0044] Although this paper extensively uses components such as upper die 1, punch 11, lower die 2, main module 21, pre-riveting station 211, precision riveting station 212, leak detection station 213, shearing station 214, discharge port 215, discharge groove 216, first slider 22, first movable groove 221, first driving inclined surface 2211, second movable groove 222, third driving inclined surface 2221, fourth mating inclined surface 223, first top block 23, first mating inclined surface 231, driving insert 24, second driving inclined surface 241, fourth driving inclined surface 242, first connecting surface 243, fifth driving inclined surface 244, second connecting surface 245, bottom module 25, first sliding groove 251, return spring 252, limit cover plate 26, limit groove 261, drag block 27, second sliding groove 271, and second mating inclined surface 2711, this paper also makes extensive use of these components. The terms used include: third sliding groove 272, second slider 28, second top block 29, third mating inclined surface 291, first feeding track 3, feeding section 31, working section 32, discharging section 33, second feeding track 4, material belt 5, mounting hole 51, contact element 6, protrusion 61, insertion part 62, precision riveting assembly 7, leakage detection assembly 8, nylon sleeve 81, metal top rod 82, limiting element 83, spring 84, wire 85, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A riveting die for in-mold riveting of a moving contact, characterized in that: The system includes an upper mold and a lower mold. The lower mold includes a main module. The main module is equipped with a first feeding track for conveying a material strip, a second feeding track for conveying contact components, and a pre-riveting station for pre-riveting the contact components to the material strip. The outlet end of the second feeding track is connected to the pre-riveting station. The first feeding track includes an infeed section, a working section, and an outlet section. The infeed section and the outlet section are respectively located on both sides of the pre-riveting station. The working section is positioned vertically above the pre-riveting station. A first slider is located below the main module. A first top block is provided to drive the contact element to move upward toward the material strip. The first top block is located at the pre-riveting station. A first movable groove is provided at the position of the first slider corresponding to the position of the first top block. The first movable groove includes a first driving inclined surface for driving the first top block to move up and down. A first mating inclined surface is provided at the lower end of the first top block to cooperate with the first driving inclined surface. A driving cutter is provided between the upper die and the lower die for driving the first slider to slide. A punch is provided in the upper die at the position corresponding to the pre-riveting station for pre-riveting the contact element to the material strip.

2. The riveting die for in-mold riveting moving contacts according to claim 1, characterized in that: The first slider is disposed within the bottom module, and the bottom module is provided with a first sliding groove for the first slider to slide in. On the other side of the bottom module opposite to the driving insert, a reset spring is provided to drive the first slider to reset.

3. The riveting die for in-mold riveting moving contacts according to claim 1, characterized in that: The pre-riveting station is equipped with a limiting cover plate for limiting the contact parts. One end of the limiting cover plate corresponding to the second feeding track is provided with a limiting groove for limiting a single contact part, and the other end of the limiting cover plate is provided with a drag block that drives the limiting cover plate to move back and forth.

4. The riveting die for in-mold riveting moving contacts according to claim 3, characterized in that: The drag block is provided with a second sliding groove at the position corresponding to the driving insert. The driving insert is provided with a second driving inclined surface on the other side of the limiting cover plate to drive the drag block to move back and forth. The inner wall of the second sliding groove is provided with a second mating inclined surface that cooperates with the second driving inclined surface. When the driving insert moves down, the drag block moves backward along the second driving inclined surface to drive the limiting cover plate away from the pre-riveting station. When the driving insert moves up, the drag block moves forward along the second driving inclined surface to reset and drive the front end of the limiting cover plate to abut against the outlet end of the second feeding track.

5. The riveting die for in-mold riveting moving contacts according to claim 4, characterized in that: The drag block is provided with a third sliding groove at one end of the limiting cover plate. A second slider is provided in the third sliding groove and moves up and down along the third sliding groove. The front end of the second slider is provided outside the third sliding groove and connected to the limiting cover plate. A second top block is provided below the second slider to drive the second slider to move up and down. A second movable groove is provided at the position of the first slider corresponding to the position of the second top block. The second movable groove includes a third driving inclined surface for driving the second top block to move up and down. A third mating inclined surface is provided at the lower end of the second top block to cooperate with the third driving inclined surface.

6. The riveting die for in-mold riveting moving contacts according to claim 5, characterized in that: The first slider has a fourth mating inclined surface at one end corresponding to the driving insert. The driving insert has a stepped fourth driving inclined surface, a first connecting surface, a fifth driving inclined surface, and a second connecting surface at one end corresponding to the fourth driving inclined surface. When the driving insert is in the initial position, the fourth driving inclined surface and the fourth mating inclined surface are in contact. When the driving insert continues to move down, the first connecting surface is in contact with the rear end face of the first slider. The first top block and the second top block initially push up to make the contact element engage with the material strip. When the driving insert moves down to the point where the fifth driving inclined surface and the fourth mating inclined surface are in contact, the limiting cover plate disengages from the pre-riveting position. When the driving insert continues to move down, the second connecting surface is in contact with the rear end face of the first slider. The first top block continues to push up to further push the contact element and the material strip in. At the same time, the punch presses down to cooperate with the first top block to achieve pre-riveting. The height of the second top block remains unchanged.

7. The riveting die for in-mold riveting moving contacts according to claim 1, characterized in that: The contact element includes a protrusion and an insertion portion. A row of mounting holes for inserting the contact element is provided at both ends of the material strip. The diameter of the mounting holes is adapted to the diameter of the insertion portion, and the spacing between the mounting holes in the same row is equal. There are two second feeding tracks. The spacing between the two second feeding tracks is adapted to the spacing between the mounting holes of the material strip. The discharge end of the second feeding track near the feeding section is aligned with the mounting hole at the other end of the material strip opposite to the second feeding track. The discharge end of the second feeding track near the discharge section is aligned with the mounting hole at the end of the material strip corresponding to the second feeding track.

8. The riveting die for in-mold riveting moving contacts according to claim 1, characterized in that: The main module is equipped with a precision riveting station and a leak detection station at the corresponding discharge section. Below the precision riveting station is a precision riveting assembly for further riveting the contact element to the material strip. Below the leak detection station is a leak detection assembly, which includes a hollow nylon sleeve and a metal push rod for communicating with the contact point. One end of the metal push rod is located inside the nylon sleeve, and the other end passes through the nylon sleeve and is located below the contact element. A limiter is provided at the bottom of the nylon sleeve, and a spring is provided between the limiter and the metal push rod. The spring is connected to an electrical wire.

9. A riveting die for in-mold riveting moving contacts according to claim 8, characterized in that: The main module is provided with a feeding port at one end of the discharge section. A shearing station for cutting the material strip into finished parts is provided between the leakage detection station and the feeding port. The shearing station is provided with a shearing component, and a discharge chute for discharging excess waste material is provided below the shearing station.

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