A screw with a notch, a manufacturing method and a manufacturing mold

Abstract

The application discloses a screw with a notch, a manufacturing method and a manufacturing die, and comprises the following steps: a first die comprises a first die body, the first die body is provided with a first mounting channel in the axial direction, the first die further comprises a first forming sleeve, a second forming sleeve and a first abutting ring which are sequentially mounted in the first mounting channel, and the first forming sleeve is provided with a first forming space; a second die further comprises a third forming sleeve, a fourth forming sleeve and a second abutting ring which are sequentially mounted in the second mounting channel, and the second die further comprises at least one cutting head which is arranged on the inner wall of the fourth forming space. By adopting the mode of firstly forming a taper section on the end of the raw material rod and then cutting the cutting port by using the cutting head, a collecting groove can be provided for the cut material, the extrusion of the material on the inner wall of the cutting port is reduced, the yield of the cutting port is improved, the cost is reduced, and the efficiency and the yield are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of screws, and more particularly to a notched screw, a manufacturing method, and a manufacturing mold. Background Technology

[0002] Screws are common hardware tools in daily life and are frequently used fasteners in the field of mechanical assembly. They generally consist of a screw head and a threaded rod extending from the head. The outer circumference of the threaded rod is provided with external threads, which mesh with the internal threads of the corresponding screw holes to lock and fix multiple parts together. They are easy to assemble and disassemble and are widely used in the connection and assembly of equipment, tooling, and components.

[0003] To improve screw insertion performance, existing technologies often include a notch at the end of the screw shaft furthest from the screw head. This notch serves to remove and guide chips, collecting the cutting debris generated during screw insertion and preventing chip accumulation between threads. This reduces insertion torque and minimizes the risk of jamming or substrate cracking. Simultaneously, the notch can accommodate substrate material undergoing plastic flow under pressure, preventing excessive material compression that could cause locking abnormalities. Some notches can also form simple cutting edges to assist in cutting the substrate, facilitating screw insertion and improving assembly smoothness.

[0004] However, in the existing technology, in order to create a notch at the end of the screw that is far from the screw head, it is usually necessary to add a milling process to the existing manufacturing process. The notch is formed at the end of the screw that is far from the head by milling, which not only has high processing and forming costs, but also has a low product yield in mass production. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a screw with a notch, a manufacturing method, and a manufacturing mold. By first forming a tapered section at the end of the raw material rod and then using a cutting head to cut and form a cutting notch, a collection groove can be provided for the cut material, reducing the pressure of the material on the inner wall of the cutting notch, which helps to improve the yield of the cutting notch. This reduces costs while significantly improving efficiency and yield.

[0006] To achieve the above objectives, the present invention aims to provide a manufacturing mold for a screw with a notch, comprising:

[0007] A first mold, comprising a first mold body having an axially arranged first mounting channel, further comprising a first forming collar, a second forming collar, and a first abutting ring sequentially mounted within the first mounting channel; the first forming collar having a first forming space, and the second forming collar having a second forming space; the first forming space and the second forming space correspondingly communicating, and the diameter of the second forming space being smaller than the diameter of the first forming space; the diameter of the second forming space near the end of the first forming collar being smaller than the diameter of the end of the second forming space near the first abutting ring;

[0008] The second mold includes a second mold body with an axially arranged second mounting channel. The second mold further includes a third forming collar, a fourth forming collar, and a second abutment ring sequentially mounted in the second mounting channel. The third forming collar has a third forming space, and the fourth forming collar has a fourth forming space. The third forming space and the fourth forming space are correspondingly connected, and the diameter of the fourth forming space is smaller than the diameter of the third forming space. The second mold further includes at least one cutting head disposed on the inner wall of the fourth forming space.

[0009] In some embodiments, the first mold further includes a first fixing cap, the first fixing cap including a first cap body and a first connecting protrusion extending outward from the middle region of the first cap body, the first connecting protrusion being inserted into the first mounting channel, abutting against the first abutting ring, and fixedly connected to the first mold body.

[0010] The second mold further includes a second fixing cap, the second fixing cap including a second cap body and a second connecting convex shaft extending outward from the middle region of the second cap body, the second connecting convex shaft being inserted into the second mounting channel, abutting against the second abutting ring, and fixedly connected to the second mold body.

[0011] In some embodiments, the first mold further includes a first push rod;

[0012] The first mold has a first ejection channel that passes through the first abutment ring and the first fixing cap, and the first ejection channel is coaxially arranged with the second molding space; the first push rod is adapted to be inserted into the first ejection channel from the side of the first abutment ring away from the second molding kit, and one end of the first push rod extending into the first ejection channel can extend into the first molding space;

[0013] The second mold further includes a second push rod; the second mold has a second ejection channel passing through the second abutment ring and the second fixing cap, the second ejection channel being coaxially arranged with the fourth molding space; the second push rod is adapted to be inserted into the second ejection channel from the side of the second abutment ring away from the fourth molding kit, and one end of the second push rod extending into the second ejection channel can extend into the third molding space.

[0014] In some embodiments, the first mold further includes a first C-ring, which is mounted on the first mounting channel and sleeved on the outside of the first molding collar and the second molding collar;

[0015] The second mold further includes a second C-shaped ring, which is installed in the second mounting channel and sleeved on the outside of the third forming ring and the fourth forming ring;

[0016] The outer surface of the first C-ring is generally tapered, and the diameter of the outer surface of the first C-ring gradually increases along the direction from the first molded collar to the second molded collar; the inner wall of the first mounting channel is also generally tapered, and the diameter of the inner wall of the first mounting channel gradually increases along the direction from the first molded collar to the second molded collar.

[0017] The outer surface of the second C-shaped ring is generally tapered, and the diameter of the outer surface of the second C-shaped ring gradually increases along the direction from the third forming collar to the fourth forming collar; the inner wall of the second mounting channel is also generally tapered, and the diameter of the inner wall of the second mounting channel gradually increases along the direction from the third forming collar to the fourth forming collar.

[0018] In some embodiments, the outline of the outer surface of the first molded collar is generally conical, and the diameter of the outer surface of the first molded collar gradually increases along the direction from the first molded collar to the second molded collar; the outline of the inner wall surface of the first C-ring is generally conical, and the diameter of the inner wall surface of the first C-ring gradually increases along the direction from the first molded collar to the second molded collar.

[0019] The outer surface of the third forming collar is generally conical, and the diameter of the outer surface of the third forming collar gradually increases along the direction from the third forming collar to the fourth forming collar; the inner wall surface of the second C-shaped ring is generally conical, and the diameter of the inner wall surface of the second C-shaped ring gradually increases along the direction from the third forming collar to the fourth forming collar.

[0020] In some embodiments, the second mold further includes a fifth forming collar located on the side of the third forming collar away from the fourth forming collar, the fifth forming collar having a fifth forming space communicating with the third forming space, and the diameter of the fifth forming space being larger than the diameter of the third forming space.

[0021] In some embodiments, the manufacturing mold for the notched screw further includes a third mold, the third mold including a third mold body having an axially arranged third mounting channel, the third mold further including a sixth forming collar, a seventh forming collar and a third abutment ring sequentially mounted in the third mounting channel, the sixth forming collar having a sixth forming space, the seventh forming collar having a seventh forming space, the sixth forming space and the seventh forming space correspondingly communicating, and the diameter of the seventh forming space being smaller than the diameter of the sixth forming space.

[0022] According to another aspect of this application, a method for manufacturing screws based on a notched screw manufacturing mold as described in any of the preceding claims is further provided, comprising:

[0023] After the raw material rod is inserted into the second forming space through the first forming space of the first mold, the end of the raw material rod located outside the first mold is stamped, so that part of the raw material rod is pressed into the second forming space, so that the raw material rod forms a first section rod and a second section rod. The diameter of the first section rod is larger than the diameter of the second section rod, and the end of the second section rod away from the first section rod forms a tapered section.

[0024] The second rod with the tapered end is inserted into the third forming space of the second mold and then into the fourth forming space. The tapered end abuts against the cutting head. The first rod is pressed and pushed to continue moving into the fourth forming space. The cutting head cuts the tapered end to form at least one cutting edge.

[0025] In some embodiments, the manufacturing mold for the notched screw further includes a third mold, the third mold including a third mold body having an axially arranged third mounting channel, the third mold further including a sixth forming collar, a seventh forming collar and a third abutment ring sequentially mounted in the third mounting channel, the sixth forming collar having a sixth forming space, the seventh forming collar having a seventh forming space, the sixth forming space and the seventh forming space correspondingly communicating, and the diameter of the seventh forming space being smaller than the diameter of the sixth forming space;

[0026] Before the raw material rod is placed into the first mold, the raw material rod is first inserted into the seventh molding space through the sixth molding space of the third mold, and then the end of the raw material rod located outside the third mold is stamped, so that part of the raw material rod is pressed into the sixth molding space, so that the raw material rod forms the first section rod and the second section rod;

[0027] After the second segment rod passes through the first forming space of the first mold, it is inserted into the second forming space. The first segment rod is pressed, which drives the second segment rod to move away from the first forming space in the second forming space, so as to form a tapered section at the end of the second segment rod away from the first segment rod.

[0028] According to another aspect of this application, a notched screw is further provided, manufactured using any of the manufacturing methods described above, comprising: a screw and a nut, wherein the end of the screw away from the nut has the tapered section with at least one cutting edge. Attached Figure Description

[0029] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0030] Figure 1 This is a perspective view of the first mold of the manufacturing mold for a notched screw according to a preferred embodiment of the present invention.

[0031] Figure 2 This is a three-dimensional structural schematic diagram of the first mold of the manufacturing mold for a notched screw according to a preferred embodiment of the present invention;

[0032] Figure 3 This is a front structural schematic diagram of the first mold of the manufacturing mold for a notched screw according to a preferred embodiment of the present invention;

[0033] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of line AA in the middle;

[0034] Figure 5 This is an exploded structural diagram of the first mold of a manufacturing mold for a notched screw according to a preferred embodiment of the present invention.

[0035] Figure 6 This is an exploded structural schematic diagram of the first mold of the manufacturing mold for a notched screw, which is a preferred embodiment of the present invention, from another perspective.

[0036] Figure 7This is a cross-sectional structural schematic diagram of the second mold of the manufacturing mold for a notched screw according to a preferred embodiment of the present invention;

[0037] Figure 8 This is a cross-sectional structural schematic diagram of the third mold of the manufacturing mold for a notched screw according to a preferred embodiment of the present invention;

[0038] Figure 9 This is a front view of the fourth forming collar of the second mold of the manufacturing mold for a notched screw according to a preferred embodiment of the present invention.

[0039] Figure 10 This is a schematic diagram of the structure of the raw material rod of the manufacturing mold for the notched screw of the present invention being formed in the second mold according to a preferred embodiment of the present invention;

[0040] Figure 11 This is a three-dimensional structural schematic diagram of a screw with a notch according to a preferred embodiment of the present invention;

[0041] Figure 12 This is a three-dimensional structural schematic diagram of a screw with a notch, representing a preferred embodiment of the present invention.

[0042] Figure 13 This is a flowchart of a preferred embodiment of the manufacturing method of a notched screw according to the present invention.

[0043] Icon labels:

[0044] 100. Manufacturing mold for a notched screw; 10. First mold; 11. First mold body; 110. First mounting channel; 12. First forming collar; 120. First forming space; 13. Second forming collar; 130. Second forming space; 14. First abutment ring; 15. First fixing cap; 151. First cap body; 152. First connecting cam; 16. First push rod; 17. First ejection channel; 18. First C-ring; 20. Second mold; 21. Second mold body; 210. Second mounting channel; 22. Third forming collar; 220. Third forming space; 23. Fourth forming collar; 230. Fourth forming space; 231. Cutting 24. Second abutment ring; 25. Second fixing cap; 251. Second cap body; 252. Second connecting cam; 26. Second push rod; 27. Second ejection channel; 28. Second C-shaped ring; 29. ​​Fifth forming collar; 290. Fifth forming space; 30. Third mold; 31. Third mold body; 310. Third installation channel; 32. Sixth forming collar; 320. Sixth forming space; 33. Seventh forming collar; 34. Third abutment ring; 330. Seventh forming space; 40. Screw with notch; 41. Screw rod; 411. Tapered section; 410. Cutting edge; 42. Nut; 421. Hexagonal screw structure; 422. Circular baffle. Detailed Implementation

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0046] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0047] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0048] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] refer to Figures 1 to 10 This application provides a manufacturing mold 100 for screws with notches, comprising a first mold 10 and a second mold 20. The first mold 10 includes a first mold body 11, which has an axially arranged first mounting channel 110. The first mold 10 further includes a first forming collar 12, a second forming collar 13, and a first abutment ring 14 sequentially mounted within the first mounting channel 110. The first forming collar 12 has a first forming space 120, and the second forming collar 13 has a second forming space 130. The first forming space 120 and the second forming space 130 are correspondingly connected, and the diameter of the second forming space 130 is smaller than the diameter of the first forming space 120; the diameter of the second forming space 130 near the first forming collar 12 is smaller than the diameter of the second forming space 130 near the first abutment ring 14.

[0051] The second mold 20 includes a second mold body 21, which has an axially arranged second mounting channel 210. The second mold 20 further includes a third forming collar 22, a fourth forming collar 23, and a second abutment ring 24 sequentially mounted within the second mounting channel 210. The third forming collar 22 has a third forming space 220, and the fourth forming collar 23 has a fourth forming space 230. The third forming space 220 and the fourth forming space 230 are correspondingly connected, and the diameter of the fourth forming space 230 is smaller than the diameter of the third forming space 220. The second mold 20 further includes at least one cutting head 231 disposed on the inner wall of the fourth forming space 230.

[0052] The notched screw manufacturing mold 100 provided in this application is mainly used to manufacture screws with at least one cutting edge 410 at the end. The specific manufacturing method is as follows: After inserting the raw material rod through the first forming space 120 of the first mold 10 into the second forming space 130, the end of the raw material rod located outside the first mold 10 is pressed, so that part of the raw material rod is pressed into the second forming space 130, so that the raw material rod forms a first segment rod and a second segment rod. The diameter of the first segment rod is larger than the diameter of the second segment rod, and the end of the second segment rod away from the first segment rod forms a tapered section 411. The end of the second segment rod with the tapered section 411 is inserted into the third forming space 220 of the second mold 20 and then into the fourth forming space 230. The tapered section 411 abuts against the cutting head 231. The first segment rod is pressed and pushed to continue moving into the fourth forming space 230. The cutting head 231 cuts at least one cutting edge 410 in the tapered section 411.

[0053] Before the raw material rod is processed by the first mold 10 of the manufacturing mold 100 with the notched screw, the raw material rod is a cylindrical rod with the same diameter everywhere. After being processed by the first mold 10, the raw material rod becomes a two-section structure, that is, forming a first section rod and a second section rod, and the diameter of the first section rod is larger than the diameter of the second section rod. Since the diameter of the second forming space 130 near the first forming collar 12 is smaller than the diameter of the second forming space 130 near the first abutment ring 14, the tapered section 411 can be formed at the end of the second section rod away from the first section rod.

[0054] After processing the raw material rod using the first mold 10, the second mold 20 is used to continue processing the raw material rod. One end of the raw material rod with the tapered section 411 is inserted into the fourth forming space 230 of the second mold 20, and the tapered section 411 abuts against the cutting head 231. Then, the raw material rod is pushed towards the bottom of the fourth forming space 230, so that the tapered section 411 moves relative to the cutting head 231, and the cutting head 231 can cut at least one cutting edge 410 in the tapered section 411.

[0055] refer to Figure 10It should be noted that, since a tapered section 411 is formed at one end of the raw material rod, and a collection groove 43 is formed between the tapered section 411 and the inner wall of the fourth forming space 230 of the second mold 20, the debris formed by the cutting head 231 cutting the tapered section 411 can enter the collection groove 43, thereby helping the cutting head 231 to cut the cutting edge 410 in the tapered section 411. In other words, by first forming the tapered section 411 at the end and then using the cutting head 231 to cut and form the cutting edge 410, a collection groove 43 can be provided for the cut material, reducing the pressure of the material on the inner wall of the cutting edge 410 and helping to improve the yield of the cutting edge 410. On the other hand, in this application, integrating the process of cutting to form the cutting edge 410 into the forming process of the screw 41 can reduce costs while significantly improving efficiency and yield.

[0056] refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 as well as Figure 6 The first mold 10 further includes a first fixing cap 15, which includes a first cap body 151 and a first connecting protrusion 152 extending outward from the middle region of the first cap body 151. The first connecting protrusion 152 is inserted into the first mounting channel 110, abuts against the first abutment ring 14, and is fixedly connected to the first mold body 11. The second mold 20 further includes a second fixing cap 25, which includes a second cap body 251 and a second connecting protrusion 252 extending outward from the middle region of the second cap body 251. The second connecting protrusion 252 is inserted into the second mounting channel 210, abuts against the second abutment ring 24, and is fixedly connected to the second mold body 21.

[0057] Preferably, the first connecting shaft 152 and the first cap body 151, and the second connecting shaft 252 and the second cap body 251 are both fixed by threaded connections. The first connecting shaft 152 and the inner wall of the first mounting channel 110 are respectively provided with mutually compatible threads, and the second connecting shaft 252 and the inner wall of the second mounting channel 210 are respectively provided with mutually compatible threads. In some modified embodiments, the first connecting shaft 152 and the first cap body 151, and the second connecting shaft 252 and the second cap body 251 can also be connected by screws. As long as the abutment and limiting function of the first abutment ring 14 and the second abutment ring 24 can be achieved, the specific connection and fixing method between the first connecting shaft 152 and the first cap body 151, and the second connecting shaft 252 and the second cap body 251 should not constitute a limitation of this application.

[0058] refer to Figure 5 and Figure 6 Furthermore, the first mold 10 further includes a first push rod 16; the first mold 10 has a first ejection channel 17 penetrating the first abutment ring 14 and the first fixing cap 15, the first ejection channel 17 being coaxially arranged with the second forming space 130; the first push rod 16 is adapted to be inserted into the first ejection channel 17 from the side of the first abutment ring 14 away from the second forming kit, and one end of the first push rod 16 extending into the first ejection channel 17 can extend into the first forming space 120. After the raw material rod is stamped and formed in the first forming space 120 and the second forming space 130 of the first mold 20, the first push rod 16 is inserted from the end of the first ejection channel 17 where the first fixing cap 15 is located, pushing the raw material rod away from the second forming space 130 and the first forming space 120, so that the raw material rod is separated from the first mold 10.

[0059] Similarly, the second mold 20 further includes a second push rod 26; the second mold 20 has a second ejection channel 27 penetrating the second abutment ring 24 and the second fixing cap 25, the second ejection channel 27 being coaxially arranged with the fourth forming space 230; the second push rod 26 is adapted to be inserted into the second ejection channel 27 from the side of the second abutment ring 24 away from the fourth forming kit, and one end of the second push rod 26 extending into the second ejection channel 27 can extend into the third forming space 220. After the raw material rod is stamped in the fourth forming space 230 and the third forming space 220 of the second mold 30, the second push rod 17 is inserted from the end of the second ejection channel 27 where the second fixing cap 25 is located, pushing the raw material rod away from the fourth forming space 230 and the third forming space 220, so that the raw material rod is separated from the second mold 20.

[0060] Preferably, the diameter of the first ejection channel 17 is smaller than the diameter of the second forming space 130, and the diameter of the second ejection channel 27 is smaller than the diameter of the fourth forming space 230.

[0061] refer to Figure 5 and Figure 6 The first mold 10 further includes a first C-shaped ring 18, which is mounted on the first mounting channel 110 and sleeved on the outside of the first forming collar 12 and the second forming collar 13. The second mold 20 further includes a second C-shaped ring 28, which is mounted on the second mounting channel 210 and sleeved on the outside of the third forming collar 22 and the fourth forming collar 23. The outer surface profile of the first C-shaped ring 18 corresponding to the portion of the first forming collar 12 is tapered, and the diameter of the outer surface profile of the tapered segment of the first C-shaped ring 18 gradually increases along the direction from the first forming collar 12 to the second forming collar 13.

[0062] The outline of the inner wall of the first mounting channel 110 corresponding to the first molding collar 12 is also tapered. Along the direction from the first molding collar 12 to the second molding collar 13, the diameter of the inner wall of the first mounting channel 110 corresponding to the first molding collar 12 gradually increases.

[0063] During installation, the first molded collar 12 and the second molded collar 13 are first installed inside the first C-shaped ring 18. Then, the first molded collar 12, the second molded collar 13, and the first C-shaped ring 18 are inserted together into the first installation channel 110 through the opening on the side where the first fixing cap 15 is located. After the first C-shaped ring 18 is installed in place within the first installation channel 110, the outer wall of the first C-shaped ring 18 abuts against the outer wall of the first installation channel 110 to limit the position of the first C-shaped ring 18. It should also be noted that before the first C-shaped ring 18 is installed in the first installation channel 110, the size of the notch of the first C-shaped ring 18 is relatively large, and the overall diameter of the first C-shaped ring 18 is also relatively large. During the process of installing the first C-shaped ring 18 into the first installation channel 110, the diameter of the first C-shaped ring 18 gradually decreases, and the notch of the first C-shaped ring 18 also gradually decreases, thereby clamping the first molded collar 12 and the second molded collar 13.

[0064] Furthermore, the outer surface of the first molded collar 12 is generally tapered, and its diameter gradually increases along the direction from the first molded collar 12 to the second molded collar 13; the inner wall of the first C-ring 18 is generally tapered, and its diameter gradually increases along the direction from the first molded collar 12 to the second molded collar 13. After the first C-ring 18 is installed in the first mounting channel 110, the inner tapered surface of the first C-ring 18 mates with the outer tapered surface of the first molded collar 12 to limit the positioning of the first molded collar 12.

[0065] Preferably, the outer surface of the second C-ring 28 is generally tapered, and the diameter of the outer surface of the second C-ring 28 gradually increases along the direction from the third forming collar 22 to the fourth forming collar 23. The inner wall of the second mounting channel 210 is also generally tapered, and the diameter of the inner wall of the second mounting channel 210 gradually increases along the direction from the third forming collar 22 to the fourth forming collar 23. Preferably, the outer surface of the third forming collar 22 is generally tapered, and the diameter of the outer surface of the third forming collar 22 gradually increases along the direction from the third forming collar 22 to the fourth forming collar 23; the inner wall of the second C-ring 28 is generally tapered, and the diameter of the inner wall of the second C-ring 28 gradually increases along the direction from the third forming collar 22 to the fourth forming collar 23. The engagement method of the second C-ring 28, the second mounting channel 210 and the third forming collar 22 has the same principle as the engagement method of the first C-ring 18, the first mounting channel 110 and the first forming collar 12, and will not be described again here.

[0066] refer to Figure 7 Furthermore, the second mold 20 further includes a fifth forming collar 29, which is located on the side of the third forming collar 22 away from the fourth forming collar 23. The fifth forming collar 29 has a fifth forming space 290, which is connected to the third forming space 220. The diameter of the fifth forming space 290 is larger than the diameter of the third forming space 220.

[0067] During the process of forming the raw material rod using the second mold 20, the first rod segment can be formed into two rod segments with different diameters in the fifth forming space 290 and the third forming space 220, respectively. The rod segment with the larger diameter can be further processed to form a nut 42, which further includes a hexagonal screw structure 421 and a circular baffle 422.

[0068] refer to Figure 8In some embodiments, the manufacturing mold 100 for the notched screw further includes a third mold 30. The third mold 30 includes a third mold body 31, which has an axially arranged third mounting channel 310. The third mold 30 further includes a sixth forming collar 32, a seventh forming collar 33, and a third abutment ring 34 sequentially installed within the third mounting channel 310. The sixth forming collar 32 has a sixth forming space 320, and the seventh forming collar 33 has a seventh forming space 330. The sixth forming space 320 and the seventh forming space 330 are correspondingly connected, and the diameter of the seventh forming space 330 is smaller than the diameter of the sixth forming space 320. The only difference between the third mold 30 and the first mold 10 is that the seventh forming space 330 is a cylindrical channel, not the conical structure of the second forming space 130 in the first mold 10. All other structures are the same and will not be described again here.

[0069] refer to Figure 13 According to another aspect of this application, a method for manufacturing screws based on the aforementioned notched screw manufacturing mold 100 is further provided, comprising:

[0070] S101: After the raw material rod is inserted into the second forming space 130 through the first forming space 120 of the first mold 10, the end of the raw material rod located outside the first mold 10 is pressed, so that part of the raw material rod is pressed into the second forming space 130, so that the raw material rod forms a first section rod and a second section rod, the diameter of the first section rod is larger than the diameter of the second section rod, and the end of the second section rod away from the first section rod forms a tapered section 411;

[0071] S102: Insert one end of the second rod having the tapered section 411 into the third forming space 220 of the second mold 20 and into the fourth forming space 230. The tapered section 411 abuts against the cutting head 231. The first rod is pressed and pushed to continue moving into the fourth forming space 230. The cutting head 231 cuts at least one cutting edge 410 in the tapered section 411.

[0072] The manufacturing mold 100 for the notched screw further includes a third mold 30, which includes a third mold body 31. The third mold body 31 has an axially arranged third mounting channel 310. The third mold 30 further includes a sixth forming collar 32, a seventh forming collar 33, and a third abutment ring 34 sequentially installed in the third mounting channel 310. The sixth forming collar 32 has a sixth forming space 320, and the seventh forming collar 33 has a seventh forming space 330. The sixth forming space 320 and the seventh forming space 330 are correspondingly connected, and the diameter of the seventh forming space 330 is smaller than the diameter of the sixth forming space 320.

[0073] The manufacturing method further includes:

[0074] S103: Before placing the raw material rod into the first mold 10, the raw material rod is first inserted into the seventh molding space 330 through the sixth molding space 320 of the third mold 30, and then the end of the raw material rod located outside the third mold 30 is pressed, so that part of the raw material rod is pressed into the sixth molding space 320, so that the raw material rod forms the first segment rod and the second segment rod; the second segment rod is inserted into the second molding space 130 after passing through the first molding space 120 of the first mold 10, and the first segment rod is pressed to drive the second segment rod to move away from the first molding space 120 in the direction of the second molding space 130, so as to form a tapered segment 411 at the end of the second segment rod away from the first segment rod.

[0075] refer to Figure 11 and Figure 12 According to another aspect of this application, a notched screw 40 is further provided, manufactured using the above-described manufacturing method, comprising: a screw 41 and a nut 42, wherein the end of the screw 41 away from the nut 42 has a tapered section 411, and the tapered section 411 has at least one cutting edge 410. Preferably, the number of cutting edges 410 is three, and the specific number of cutting edges 410 should not constitute a limitation of this application.

[0076] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments; any variations or modifications can be made to the implementation of the present invention without departing from these principles.

Claims

1. A manufacturing mold for a screw with a notch, characterized in that, include: A first mold, comprising a first mold body having an axially arranged first mounting channel, further comprising a first forming collar, a second forming collar, and a first abutting ring sequentially mounted within the first mounting channel; the first forming collar having a first forming space, and the second forming collar having a second forming space; the first forming space and the second forming space correspondingly communicating, and the diameter of the second forming space being smaller than the diameter of the first forming space; the diameter of the second forming space near the end of the first forming collar being smaller than the diameter of the end of the second forming space near the first abutting ring; The second mold includes a second mold body with an axially arranged second mounting channel. The second mold further includes a third forming collar, a fourth forming collar, and a second abutment ring sequentially mounted in the second mounting channel. The third forming collar has a third forming space, and the fourth forming collar has a fourth forming space. The third forming space and the fourth forming space are correspondingly connected, and the diameter of the fourth forming space is smaller than the diameter of the third forming space. The second mold further includes at least one cutting head disposed on the inner wall of the fourth forming space.

2. The manufacturing mold for a notched screw according to claim 1, characterized in that, The first mold further includes a first fixing cap, the first fixing cap including a first cap body and a first connecting protrusion extending outward from the middle region of the first cap body, the first connecting protrusion being inserted into the first mounting channel, abutting against the first abutting ring, and fixedly connected to the first mold body; The second mold further includes a second fixing cap, the second fixing cap including a second cap body and a second connecting convex shaft extending outward from the middle region of the second cap body, the second connecting convex shaft being inserted into the second mounting channel, abutting against the second abutting ring, and fixedly connected to the second mold body.

3. The manufacturing mold for a notched screw according to claim 2, characterized in that, The first mold further includes a first push rod; The first mold has a first ejection channel that passes through the first abutment ring and the first fixing cap, and the first ejection channel is coaxially arranged with the second molding space; the first push rod is adapted to be inserted into the first ejection channel from the side of the first abutment ring away from the second molding kit, and one end of the first push rod extending into the first ejection channel can extend into the first molding space; The second mold further includes a second push rod; the second mold has a second ejection channel passing through the second abutment ring and the second fixing cap, the second ejection channel being coaxially arranged with the fourth molding space; the second push rod is adapted to be inserted into the second ejection channel from the side of the second abutment ring away from the fourth molding kit, and one end of the second push rod extending into the second ejection channel can extend into the third molding space.

4. The manufacturing mold for a notched screw according to claim 2, characterized in that, The first mold further includes a first C-shaped ring, which is installed in the first installation channel and sleeved on the outside of the first molding collar and the second molding collar; The second mold further includes a second C-shaped ring, which is installed in the second mounting channel and sleeved on the outside of the third forming ring and the fourth forming ring; The outer surface of the first C-ring is generally conical, and the diameter of the outer surface of the first C-ring gradually increases along the direction from the first molded collar to the second molded collar; the inner wall of the first mounting channel is also generally conical, and the diameter of the inner wall of the first mounting channel gradually increases along the direction from the first molded collar to the second molded collar. The outer surface of the second C-shaped ring is generally tapered, and the diameter of the outer surface of the second C-shaped ring gradually increases along the direction from the third forming collar to the fourth forming collar; the inner wall of the second mounting channel is also generally tapered, and the diameter of the inner wall of the second mounting channel gradually increases along the direction from the third forming collar to the fourth forming collar.

5. The manufacturing mold for a notched screw according to claim 2, characterized in that, The outer surface of the first molded collar is generally conical, and the diameter of the outer surface of the first molded collar gradually increases along the direction from the first molded collar to the second molded collar; the inner wall surface of the first C-shaped ring is generally conical, and the diameter of the inner wall surface of the first C-shaped ring gradually increases along the direction from the first molded collar to the second molded collar. The outer surface of the third forming collar is generally conical, and the diameter of the outer surface of the third forming collar gradually increases along the direction from the third forming collar to the fourth forming collar; the inner wall surface of the second C-shaped ring is generally conical, and the diameter of the inner wall surface of the second C-shaped ring gradually increases along the direction from the third forming collar to the fourth forming collar.

6. The manufacturing mold for a notched screw according to claim 5, characterized in that, The second mold further includes a fifth forming collar, which is located on the side of the third forming collar away from the fourth forming collar. The fifth forming collar has a fifth forming space, which is connected to the third forming space. The diameter of the fifth forming space is larger than the diameter of the third forming space.

7. The manufacturing mold for a notched screw according to claim 1, characterized in that, The manufacturing mold for the notched screw further includes a third mold, the third mold body having an axially arranged third mounting channel, and the third mold further including a sixth forming collar, a seventh forming collar, and a third abutment ring sequentially mounted in the third mounting channel. The sixth forming collar has a sixth forming space, and the seventh forming collar has a seventh forming space. The sixth forming space and the seventh forming space are correspondingly connected, and the diameter of the seventh forming space is smaller than the diameter of the sixth forming space.

8. A method for manufacturing screws based on a notched screw manufacturing mold according to any one of claims 1 to 6, characterized in that, include: After the raw material rod is inserted into the second forming space through the first forming space of the first mold, the end of the raw material rod located outside the first mold is stamped, so that part of the raw material rod is pressed into the second forming space, so that the raw material rod forms a first section rod and a second section rod. The diameter of the first section rod is larger than the diameter of the second section rod, and the end of the second section rod away from the first section rod forms a tapered section. The second rod with the tapered end is inserted into the third forming space of the second mold and then into the fourth forming space. The tapered end abuts against the cutting head. The first rod is pressed and pushed to continue moving into the fourth forming space. The cutting head cuts the tapered end to form at least one cutting edge.

9. The manufacturing method according to claim 8, characterized in that, The manufacturing mold for the notched screw further includes a third mold, the third mold including a third mold body, the third mold body having an axially arranged third mounting channel, the third mold further including a sixth forming collar, a seventh forming collar and a third abutment ring sequentially installed in the third mounting channel, the sixth forming collar having a sixth forming space, the seventh forming collar having a seventh forming space, the sixth forming space and the seventh forming space correspondingly communicating, and the diameter of the seventh forming space being smaller than the diameter of the sixth forming space; Before the raw material rod is placed into the first mold, the raw material rod is first inserted into the seventh molding space through the sixth molding space of the third mold, and then the end of the raw material rod located outside the third mold is stamped, so that part of the raw material rod is pressed into the sixth molding space, so that the raw material rod forms the first segment rod and the second segment rod; After the second segment rod passes through the first forming space of the first mold, it is inserted into the second forming space. The first segment rod is pressed, which drives the second segment rod to move away from the first forming space in the second forming space, so as to form a tapered section at the end of the second segment rod away from the first segment rod.

10. A screw with a notch, characterized in that, The product is manufactured using the manufacturing method of claim 8 or 9, characterized in that it comprises: a screw and a nut, wherein the end of the screw away from the nut has the tapered section with at least one cutting edge.

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