Tooth twisting mechanism and tooth twisting mold

Abstract

The invention relates to a thread twisting mechanism and a thread twisting mould, the thread twisting mechanism comprises a thread twisting body, and the thread twisting body comprises an annular main body part and a spiral part fixed at one axial end of the main body part; the fixing body comprises an annular separation ring, the separation ring is used for being attached to and supporting the spiral part in the radial direction, and the separation ring is located on the inner side of the twisted tooth body and can rotate relative to the twisted tooth body; the first rotating gear is fixedly connected to the axial end, away from the spiral part, of the main body part; and the first sliding rack is meshed with the first rotating gear. The device has the advantages that threads with appropriate thread pitches and appropriate thread starting points are machined on bottle cap products in the bottle cap injection molding production process, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of bottle cap processing molds, and in particular to a thread twisting mechanism and a thread twisting mold. Background Art

[0002] Most of the existing bottle caps are manufactured using molds, and common bottle caps are processed with internal threads so that the bottle caps can be screwed onto the bottle body. In the prior art, the bottle caps manufactured by mold forming need to be processed with threads on the inner side of the bottle caps in subsequent processing steps, which makes the production efficiency of the bottle caps low. Summary of the invention

[0003] In order to solve the problem of low production efficiency of bottle caps with internal threads produced by mold forming, the present application provides a threading mechanism and a threading mold, which can process threads during the production process of bottle caps by mold forming.

[0004] In the first aspect, the present application provides a thread twisting mechanism adopting the following technical solution: A thread twisting mechanism, comprising: A twisted tooth body, the twisted tooth body comprising an annular main body and a spiral portion fixed at one axial end of the main body; A fixed body, the fixed body comprising an annular separation ring, the separation ring being used to radially fit and support the spiral portion, the separation ring being located inside the thread body and being able to rotate relative to the thread body; A first rotating gear fixedly connected to an axial end of the main body away from the spiral portion; and A first sliding rack is meshed with the first rotating gear.

[0005] By adopting the above technical solution, the first sliding rack slides and drives the first rotating gear to rotate, thereby driving the threading body to rotate. The spiral part on the threading body is used to twist a thread on the inner side of the bottle cap during the injection molding process of the bottle cap. The fixed body is used to support the spiral part to prevent the spiral part from being deformed by force, thereby ensuring the quality of the threading.

[0006] Optionally, the thread twisting mechanism further includes: A moving body, the moving body comprising a first limiting portion, a second limiting portion and a connecting portion located between the first limiting portion and the second limiting portion, the diameters of the first limiting portion and the second limiting portion are both larger than the diameter of the connecting portion, the connecting portion is rotatably connected to the first limiting portion, a portion of the first limiting portion is located on the inner side of the annular ring of the separating ring, a spline is fixedly provided on the outer side of the annular ring of the first limiting portion, and a keyway matching the spline is provided on the main body; A first magnet, fixedly connected to one end of the first limiting portion located on the inner side of the separation ring; A second magnet is fixedly connected to the end of the spiral portion away from the main body portion; An external threaded body, arranged around the outside of the connecting portion and abutting against the first limiting portion and the second limiting portion; A second rotating gear, the inner side of which has an internal thread threadedly connected to the external threaded body; and A second sliding rack is meshed with the second rotating gear.

[0007] By adopting the above technical solution, the second sliding rack slides and drives the second rotating gear to rotate, thereby driving the external threaded body to move through the threaded connection, and the movable body slides based on the abutment between the external threaded body and the first limiting part and the second limiting part. Due to the spline matching connection between the movable body and the threaded body, the movable body can move relative to the threaded body and the fixed body, so that the first magnet moves relative to the second magnet, thereby driving the spiral part to twist relative to the main body under the action of magnetic force to adjust the pitch of the spiral structure formed by the spiral part, so as to achieve the purpose of adjusting the thread pitch. In addition, the first limiting part in the movable body is connected with the main body in the threaded body through a spline, so that the first limiting part of the movable body can rotate with the threaded body, keep the relative stillness between the first magnet and the second magnet, thereby ensuring the stability of the spiral part.

[0008] Optionally, the connecting portion is in a non-rotating shape.

[0009] By adopting the above technical solution, the connection part connected to the external threaded body is in a non-rotating shape, thereby ensuring the reliability of the thread transmission between the second rotating gear and the external threaded body and preventing the external threaded body from rotating with the second rotating gear.

[0010] Optionally, the externally threaded body includes a first combined part and a second combined part, the outer peripheries of the first combined part and the second combined part both have threads, and the first combined part and the second combined part are adapted to the outer peripheral contour of the connecting part after being combined and connected, and the outer peripheral threads of the first combined part and the second combined part after being combined and connected are adapted to the internal threads of the second rotating gear.

[0011] By adopting the above technical solution, the external threaded body is connected by combining the first combination part and the second combination part, which facilitates the connection between the external threaded body and the connecting part.

[0012] Optionally, the thread twisting mechanism further includes: A top support member, the top support member abuts against an end of the second limiting portion away from the connecting member, and the outer periphery of the top support member has an external thread; a third rotating gear, the third rotating gear having an internal thread capable of threadably cooperating with the external thread on the outer periphery of the top support member; a third sliding rack, the third sliding rack meshing with the third rotating gear; and A synchronous member is connected between the top support member and the first rotating gear so that the first rotating gear can move synchronously with the top support member.

[0013] By adopting the above technical solution, the third sliding rack slides and drives the third rotating gear to rotate, thereby driving the top support member to move, thereby pushing the moving member to move, and at the same time driving the first rotating gear and the thread body to move together through the synchronization member, so that the thread body and the moving member move together, adjusting the thread starting point of the thread body, thereby achieving the purpose of adjusting the starting point of the thread thread of the bottle cap.

[0014] Optionally, a first annular groove is formed on the first rotating gear, a second annular groove is formed on the top support member, and one end of the synchronizer is slidably fitted in the first annular groove, and the other end is slidably fitted in the second annular groove.

[0015] By adopting the above technical solution, the two ends of the synchronizer are respectively slidably matched with the first annular groove and the second annular groove, which is convenient for disassembly and assembly of the synchronizer on the one hand, and prevents the synchronizer from interfering with the second rotating gear and the second sliding rack when rotating with the first rotating gear on the other hand.

[0016] In the second aspect, the present application provides a thread cutting die adopting the following technical solution: A thread twisting mould comprises the thread twisting mechanism as described above.

[0017] By adopting the above technical solution and applying the above threading mechanism in the threading mold, the threading mold can perform threading processing on the bottle caps during the injection molding process of producing bottle caps, without the need to add an additional threading process or replace other molds, thereby saving production costs and improving production efficiency.

[0018] Optionally, the thread-twisting mold includes a first mold body and a second mold body, at least two product spaces are formed between the first mold body and the second mold body, the number of groups of the thread-twisting mechanism is equal to the number of the product spaces and corresponds one to one, and the thread-twisting mechanism is used to twist the products injection molded in the product spaces.

[0019] By adopting the above technical solution, at least two product spaces are set in the mold, and the number of thread-twisting mechanisms is the same as the number of product spaces and corresponds one to one, thereby improving production efficiency.

[0020] Optionally, the second mold body is provided with an internal space for accommodating part of the threading mechanism, and a ball retaining sleeve for supporting the main body is installed between the internal space and the product space, and the main body and the ball retaining sleeve are capable of relative rotation and relative movement.

[0021] By adopting the above technical solution, the provision of the ball retaining sleeve can maintain the stability and reliability of the rotation of the thread body and prevent the thread body from getting stuck during rotation.

[0022] Optionally, the fixed body in the thread-twisting mechanism further includes a forming portion fixedly connected to one end of the separating ring and a column fixedly connected to the second mold body, and the forming portion is located in the product space.

[0023] By adopting the above technical solution, a column is provided to fix the forming part and the separation ring, so as to prevent the separation ring from shifting during the movement and rotation of the thread body, causing the position of the forming part to shift and affecting the injection molding effect of the bottle cap.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: Through the cooperation of the first rotating gear and the first sliding rack, the threading body can be driven to rotate to process the thread during the injection molding process of the bottle cap, which is convenient and quick, does not require additional threading process, saves costs and improves production efficiency; Through the matching arrangement of the second rotating gear and the second sliding rack and the arrangement of the spline, the movable body can move relative to the threading body and the fixed body and rotate with the threading body, and then through the magnetic attraction between the first magnet and the second magnet, not only the structural strength of the spiral part can be maintained and the threading quality can be guaranteed, but also the pitch of the spiral part can be adjusted to meet the requirements of different threading pitches, without the need to replace the corresponding threading mold, thereby further improving production efficiency; Through the coordination of the third rotating gear and the third sliding rack and the setting of the synchronous parts, the movable body and the threading body can move together to adjust the threading starting point, and also can meet more threading requirements without replacing the threading mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a thread twisting mold of the present application.

[0026] Figure 2 It is a side view of a partial cross-section of a thread-twisting mold of the present application.

[0027] Figure 3 yes Figure 2 A is an enlarged schematic diagram.

[0028] Figure 4 It is a schematic cross-sectional view of a tooth twisting mechanism in the second mold body of the present application.

[0029] Figure 5 yes Figure 4 A magnified schematic diagram of B.

[0030] Figure 6It is a three-dimensional structural schematic diagram of a thread-twisting mechanism of the present application.

[0031] Figure 7 It is an exploded schematic diagram of a thread-twisting mechanism of the present application.

[0032] Figure 8 It is an exploded schematic diagram of a moving body and an external threaded body in a thread-twisting mechanism of the present application.

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of a twisting tooth body in a twisting tooth mechanism of the present application.

[0034] Fig.10 It is a schematic diagram of two different thread pitch states after the annular thread body is unfolded.

[0035] Description of the accompanying drawings: 1. first template; 2. second template; 3. third template; 4. fourth template; 5. fifth template; 6. sixth template; 7. seventh template; 8. eighth template; 9. first rack groove; 10. second rack groove; 11. third rack groove; 12. feed port; 13. injection hole; 14. product space; 15. ball retaining sleeve; 16. forming part; 17. column; 18. separator ring; 19. spline; 20. first through hole; 21. guide groove; 22. second through hole; 23. internal space; 26. first annular groove; 27. second annular groove; 28. second magnet; 100. first mold body; 200. second mold body; 3 00, threading mechanism; 301, fixed body; 302, moving body; 302a, first limiting part; 302b, connecting part; 302c, second limiting part; 304, first rotating gear; 305, first sliding rack; 306, external thread body; 306a, first combination part; 306b, second combination part; 307, second sliding rack; 308, second rotating gear; 309, third sliding rack; 310, third rotating gear; 311, supporting body; 312, clamping body; 313, synchronous part; 314, mounting part; 315, first magnet; 316, threading body; 316a, main body; 316b, spiral part; 316b ’ , the spiral part in the short pitch state; 316b ’’ , the spiral part in the long pitch state. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings.

[0037] Combined with Figure 1 To Attachment Fig.10 The embodiment of the present application discloses a thread twisting mechanism 300 and a thread twisting mold. The thread twisting mold is used for injection molding bottle caps, and the thread twisting mechanism 300 is arranged in the thread twisting mold to twist threads on the inner side of the injection molded bottle caps.

[0038] In the first embodiment, the threading mechanism 300 includes a threading body 316, a fixed body 301, a first rotating gear 304 and a first sliding rack 305. The threading body 316 includes an annular main body 316a and a spiral portion 316b fixed to one axial end of the main body 316a. The fixed body 301 includes an annular separating ring 18, which is used to radially fit and support the spiral portion 316b. The separating ring 18 is located on the inner side of the threading body 316 and can rotate relative to the threading body 316. The first rotating gear 304 is fixedly connected to one axial end of the main body 316a away from the spiral portion 316b, and the first sliding rack 305 is meshed with the first rotating gear 304. The first sliding rack 305 is driven to slide by hydraulic drive or the like, and the first rotating gear 304 is driven to rotate, thereby driving the threading body 316 to rotate. The spiral portion 316b on the threading body 316 is used to twist a thread on the inner side of the bottle cap during the injection molding process of the bottle cap. The fixed body 301 is used to support the spiral portion 316b to prevent the spiral portion 316b from being deformed by force, thereby ensuring the threading quality.

[0039] For the thread-twisting mold, it includes a first mold body 100, a second mold body 200 and the thread-twisting mechanism 300 mentioned above. At least two product spaces 14 are formed between the first mold body 100 and the second mold body 200, and the number of groups of the thread-twisting mechanism 300 is equal to the number of product spaces 14 and corresponds one to one. The thread-twisting mechanism 300 is used to thread the products injection molded in the product space 14. In this embodiment, two product spaces 14 are formed between the first mold body 100 and the second mold body 200, and two groups of the thread-twisting mechanism 300 are set. The distribution direction of the two product spaces 14 is perpendicular to the sliding direction of the first sliding rack 305, so each thread-twisting mechanism 300 requires a separate first sliding rack 305. In other embodiments, the distribution direction of the product space 14 can also be consistent with the sliding direction of the first sliding rack 305, so that the two groups of thread-twisting mechanisms 300 can use the same first sliding rack 305. Of course, the number and distribution of the product spaces 14 can be determined according to actual mold design requirements, and the number of the first sliding racks 305 can be adjusted accordingly according to the above-mentioned setting method.

[0040] The above-mentioned thread twisting mechanism 300 is applied in the thread twisting mold, so that the thread twisting mold can twist the bottle cap during the injection molding process of the bottle cap, without the need to add an additional thread twisting process or replace other molds. In addition, at least two product spaces 14 are set in the mold, and the number of thread twisting mechanisms 300 is the same as the number of product spaces 14 and corresponds one to one, thereby improving production efficiency, saving production costs, and improving production efficiency.

[0041] In this embodiment, the twisted tooth mold is provided with a first template 1, a second template 2, a third template 3, a fourth template 4, a fifth template 5, a sixth template 6, a seventh template 7, and an eighth template 8 from top to bottom.

[0042] The first template 1, the second template 2 and the third template 3 are connected to form a first mold body 100. A feed port 12 for injection molding is opened on the first template 1, and a runner is opened on the second template 2 so that the raw materials for injection molding can be evenly distributed to each product space 14. An injection hole 13 connected to the runner is opened on the third template 3. Each product space 14 is connected to two injection holes 13, which ensures the injection efficiency on the one hand and the injection uniformity on the other.

[0043] The fourth template 4, the fifth template 5, the sixth template 6, the seventh template 7 and the eighth template 8 are connected to form the second mold body 200, and the product space 14 is formed between the third template 3 and the fourth template 4. In this embodiment, the fifth template 5 is provided with a first rack groove 9 for sliding the first sliding rack 305. In addition, an internal space 23 for accommodating part of the threading mechanism 300 is provided in the second mold body 200, and a ball retaining sleeve 15 for supporting the main body 316a is installed between the internal space 23 and the product space 14. The main body 316a and the ball retaining sleeve 15 can rotate and move relative to each other. The setting of the ball retaining sleeve 15 can maintain the stability and reliability of the threading body 316 rotating the thread, and avoid the threading body 316 from rotating and getting stuck.

[0044] In a further configuration, the fixed body 301 in the thread-cranking mechanism 300 also includes a molding portion 16 fixedly connected to one end of the separation ring 18 and a column 17 fixedly connected to the second mold body 200, and the molding portion 16 is located in the product space 14. In some specific embodiments, the molding portion 16, the column 17 and the separation ring 18 are integrally molded and produced. The molding portion 16 is arranged in the product space 14. On the one hand, it prevents the injection molding raw material from flowing into the thread-cranking mechanism 300. On the other hand, the outer contour of the molding portion 16 satisfies the shape of the injection-molded bottle cap, that is, the molding portion 16 serves as a part of the side wall contour of the product space 14. The column 17 is provided to fix the molding portion 16 and the separation ring 18, so as to prevent the separation ring 18 from shifting during the movement and rotation of the thread-cranking body 316, causing the position of the molding portion 16 to shift, thereby affecting the injection molding effect of the bottle cap.

[0045] Embodiment 2 is different from Embodiment 1 in that the threading mechanism 300 further includes a moving body 302, a first magnet 315, an external threaded body 306 of the second magnet 28, a second rotating gear 308 and a second sliding rack 307. The moving body 302 includes a first limiting portion 302a, a second limiting portion 302c and a connecting portion 302b. The connecting portion 302b is located between the first limiting portion 302a and the second limiting portion 302c, and the diameters of the first limiting portion 302a and the second limiting portion 302c are both larger than the diameter of the connecting portion 302b. The connecting portion 302b is rotatably connected to the first limiting portion 302a, a portion of the first limiting portion 302a is located on the inner side of the ring of the separation ring 18, and a spline 19 is fixedly provided on the outer side of the ring of the separation ring 18 of the first limiting portion 302a, and a keyway matching the spline 19 is provided on the main body 316a. The first magnet 315 is fixedly connected to one end of the first limiting portion 302a located on the inner side of the separation ring 18, and the second magnet 28 is fixedly connected to the end of the spiral portion 316b away from the main body 316a. There is a magnetic attraction force between the first magnet 315 and the second magnet 28. The external threaded body 306 is arranged on the outer side of the connecting portion 302b and abuts against the first limiting portion 302a and the second limiting portion 302c, that is, the movement of the external threaded body 306 can drive the moving body 302 to move through the abutment. The inner side of the second rotating gear 308 has an internal thread threadedly connected to the external threaded body 306, and the second sliding rack 307 is meshed with the second rotating gear 308.

[0046] Similarly, the second sliding rack 307 is driven to slide by hydraulic or other driving methods, and the second rotating gear 308 is driven to rotate, so that the external threaded body 306 is driven to move through the threaded connection, and the movable body 302 slides based on the abutment between the external threaded body 306 and the first limiting part 302a and the second limiting part 302c. Since the spline 19 between the movable body 302 and the threaded body 316 is matched and connected, the movable body 302 can move relative to the threaded body 316 and the fixed body 301, so that the first magnet 315 moves relative to the second magnet 28, so that the helical part 316b is driven to twist relative to the main body 316a under the action of magnetic force to adjust the pitch of the helical structure formed by the helical part 316b, so as to achieve the purpose of adjusting the threaded pitch. In addition, the first limiting portion 302a in the movable body 302 is connected to the main body 316a in the threaded body 316 via a spline 19, so that the first limiting portion 302a of the movable body 302 can rotate together with the threaded body 316, maintaining the relative stillness between the first magnet 315 and the second magnet 28, thereby ensuring the stability of the spiral portion 316b.

[0047] It should be noted that the short pitch helical portion 316b ’ The angle between the main body 316a and the helical portion 316b is smaller than that of the helical portion 316b under the long pitch. ’’ The angle between the main body 316a and the main body 316a.

[0048] In a further configuration of this embodiment, a mounting member 314 is fixedly disposed on the first limiting portion 302 a for mounting the first magnet 315 .

[0049] In a further configuration of this embodiment, a second rack groove 10 for the second sliding rack 307 to slide is opened on the sixth template 6.

[0050] In a further configuration of this embodiment, a first through hole 20 is formed on the moving member for the pillar 17 to pass through so that the pillar 17 is fixed to the second mold body 200 .

[0051] Further preferably, the connecting portion 302b is in a non-rotating shape. The connecting portion 302b connected to the external threaded body 306 is in a non-rotating shape to ensure the reliability of the thread transmission between the second rotating gear 308 and the external threaded body 306 and prevent the external threaded body 306 from rotating with the second rotating gear 308. In this embodiment, the connecting portion 302b is a square body.

[0052] Further preferably, the external threaded body 306 includes a first combination part 306a and a second combination part 306b, the outer peripheries of the first combination part 306a and the second combination part 306b are both threaded, and the first combination part 306a and the second combination part 306b are combined and connected to match the outer periphery of the connecting part 302b, and the outer periphery thread of the first combination part 306a and the second combination part 306b after being combined and connected is matched with the inner thread of the second rotating gear 308. The external threaded body 306 is combined and connected by the first combination part 306a and the second combination part 306b, which facilitates the connection between the external threaded body 306 and the connecting part 302b.

[0053] Embodiment 3 is different from Embodiment 2 in that the threading mechanism 300 further includes a top support member, a third rotating gear 310, a third sliding rack 309 and a synchronous member 313. The top support member abuts against an end of the second limiting portion 302c away from the connecting member, and the outer periphery of the top support member has an external thread. The third rotating gear 310 has an internal thread that can be threadedly matched with the external thread on the outer periphery of the top support member, and the third sliding rack 309 is meshed with the third rotating gear 310. The synchronous member 313 is connected between the top support member and the first rotating gear 304 so that the first rotating gear 304 can move synchronously with the top support member.

[0054] Similarly, the third sliding rack 309 is driven to slide and the third rotating gear 310 is driven to rotate by hydraulic means or the like, thereby driving the top support member to move, thereby pushing the moving member to move, and at the same time, the first rotating gear 304 and the threading body 316 are driven to move together through the synchronization member 313, so that the threading body 316 and the moving member move together, and the threading starting point of the threading body 316 is adjusted, so as to achieve the purpose of adjusting the starting point of the threading thread of the bottle cap. It should be noted that in the process of pushing the moving part through the supporting part and moving the first rotating gear 304 and the tooth body 316, the first sliding rack 305 and the second sliding rack 307 did not move. In order to avoid the first sliding rack 305 and the first rotating gear 304 from disengaging and avoid the second sliding rack 307 and the second rotating gear 308 from disengaging, the thickness of the first rotating gear 304 is set to be greater than the thickness of the first sliding rack 305 and the thickness of the second rotating gear 308 is set to be greater than the thickness of the second sliding rack 307, so as to ensure that the first rotating gear 304 and the first sliding rack 305 are always meshed and ensure that the second rotating gear 308 and the second sliding rack 307 are always meshed.

[0055] In a further configuration of this embodiment, a third rack groove 11 for the third sliding rack 309 to slide is opened on the seventh template 7.

[0056] In a further configuration of this embodiment, a second through hole 22 is formed on the top support member for the pillar 17 to pass through so as to fix the pillar 17 to the second mold body 200 .

[0057] In a further configuration of this embodiment, a guide groove 21 is provided on the eighth template 8 to guide the sliding of the supporting member.

[0058] Further preferably, a first annular groove 26 is provided on the first rotating gear 304, a second annular groove 27 is provided on the supporting member, one end of the synchronous member 313 is slidably matched with the first annular groove 26, and the other end is slidably matched with the second annular groove 27. Both ends of the synchronous member 313 are slidably matched with the first annular groove 26 and the second annular groove 27, respectively, which facilitates the disassembly and assembly of the synchronous member 313 on the one hand, and prevents the synchronous member 313 from interfering with the second rotating gear 308 and the second sliding rack 307 when rotating with the first rotating gear 304 on the other hand.

[0059] In a further configuration of this embodiment, a clamping member 312 is fixedly disposed on the side wall of the internal space 23 for slidingly engaging the synchronizer 313 , thereby further preventing the synchronizer 313 from rotating with the first rotating gear 304 , so as to improve the stability of the synchronizer 313 .

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A thread twisting mechanism (300), characterized in that: include: A twisted tooth body (316), the twisted tooth body (316) comprising an annular main body portion (316a) and a spiral portion (316b) fixed to one axial end of the main body portion (316a); a fixed body (301), the fixed body (301) comprising an annular separation ring (18), the separation ring (18) being used to radially adhere to and support the spiral portion (316b), the separation ring (18) being located inside the threaded body (316) and being able to rotate relative to the threaded body (316); a first rotating gear (304) fixedly connected to an axial end of the main body (316a) away from the spiral portion (316b); and A first sliding rack (305), wherein the first sliding rack (305) is meshed with the first rotating gear (304).

2. The thread twisting mechanism (300) according to claim 1, characterized in that: The thread twisting mechanism (300) further comprises: A moving body (302), the moving body (302) comprising a first limiting portion (302a), a second limiting portion (302c) and a connecting portion (302b) located between the first limiting portion (302a) and the second limiting portion (302c), the diameters of the first limiting portion (302a) and the second limiting portion (302c) being larger than the diameter of the connecting portion (302b), the connecting portion (302b) being rotatably connected to the first limiting portion (302a), a portion of the first limiting portion (302a) being located on the inner side of the ring shape of the separation ring (18), a spline (19) being fixedly provided on a portion of the first limiting portion (302a) located on the outer side of the ring shape of the separation ring (18), and a keyway matching the spline (19) being provided on the main body (316a); A first magnet (315) fixedly connected to one end of the first limiting portion (302a) located on the inner side of the separation ring (18); A second magnet (28) fixedly connected to an end of the spiral portion (316b) away from the main body portion (316a); An external threaded body (306) is disposed around the outside of the connecting portion (302b) and abuts against the first limiting portion (302a) and the second limiting portion (302c); A second rotating gear (308), the inner side of the second rotating gear (308) having an internal thread threadedly connected to the external threaded body (306); and A second sliding rack (307), wherein the second sliding rack (307) is meshed with the second rotating gear (308).

3. The thread twisting mechanism (300) according to claim 2, characterized in that: The connecting portion (302b) is in a non-rotating shape.

4. The thread twisting mechanism (300) according to claim 2 or 3, characterized in that: The external threaded body (306) comprises a first combined portion (306a) and a second combined portion (306b); the first combined portion (306a) and the second combined portion (306b) both have threads on their outer circumferences; the first combined portion (306a) and the second combined portion (306b) are combined and connected to match the outer circumferential contour of the connecting portion (302b); and the outer circumferential threads of the first combined portion (306a) and the second combined portion (306b) after being combined and connected to match the inner threads of the second rotating gear (308).

5. The thread twisting mechanism (300) according to claim 2, characterized in that: The thread twisting mechanism (300) further comprises: A top support member (311), the top support member (311) abutting against an end of the second limiting portion (302c) away from the connecting member, the outer periphery of the top support member (311) having an external thread; A third rotating gear (310), the third rotating gear (310) having an internal thread capable of threadably cooperating with an external thread on the outer periphery of the supporting member (311); a third sliding rack (309), the third sliding rack (309) being meshed with the third rotating gear (310); and A synchronous member (313), the synchronous member (313) being connected between the top support member (311) and the first rotating gear (304) so ​​that the first rotating gear (304) can move synchronously with the top support member (311).

6. The thread twisting mechanism (300) according to claim 5, characterized in that: A first annular groove (26) is formed on the first rotating gear (304), a second annular groove (27) is formed on the supporting member (311), and one end of the synchronizing member (313) is slidably engaged with the first annular groove (26), and the other end is slidably engaged with the second annular groove (27).

7. A thread cutting die, characterized in that: It comprises the thread twisting mechanism (300) as claimed in any one of claims 1 to 6.

8. The thread cutting die according to claim 7, characterized in that: The thread-twisting mold comprises a first mold body (100) and a second mold body (200), at least two product spaces (14) are formed between the first mold body (100) and the second mold body (200), the thread-twisting mechanism (300) is arranged in a number that is equal to the number of the product spaces (14) and corresponds one to one, and the thread-twisting mechanism (300) is used to thread-twisting a product injection-molded in the product space (14).

9. The thread cutting die according to claim 8, characterized in that: The second mold body (200) is provided with an internal space (23) for accommodating part of the threading mechanism (300); a ball retaining sleeve (15) for supporting the main body (316a) is installed between the internal space (23) and the product space (14); the main body (316a) and the ball retaining sleeve (15) are capable of relative rotation and relative movement.

10. The thread cutting die according to claim 9, characterized in that: The fixed body (301) in the thread-twisting mechanism (300) further comprises a forming portion (16) fixedly connected to one end of the separation ring (18) and a column (17) fixedly connected to the second mold body (200); the forming portion (16) is located in the product space (14).

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