Badminton racket string nail processing and forming die

Abstract

The invention relates to the technical field of badminton racket string nail machining, and discloses a badminton racket string nail machining forming mold which comprises a base unit, a driving unit, a forming unit, an exhaust vibration assembly and a rebound material taking assembly. The base unit comprises a base and a rack stand column, and the rack stand column is perpendicularly fixed to one side of the top face of the base; the two sets of rack stand columns are symmetrically arranged, the tops of the two sets of rack stand columns are jointly connected with a top plate, the driving unit comprises an electric push rod fixedly connected to the middle position of the top plate, a top mold box and a positioning sliding rod, and the output end of the electric push rod penetrates through the top plate to be fixedly connected with the top of the top mold box; the positioning sliding rods are symmetrically arranged and slidably connected to stand columns of the machine frame, the two sides of the top face of the top mold box are fixedly connected with the bottom faces of the positioning sliding rods, the forming unit comprises an upper mold assembly and a lower mold box assembly, the upper mold assembly is movably connected to the bottom face of the top mold box, and a bottom box is arranged on the upper surface of the base.

Description

Technical Field

[0001] This invention relates to the field of badminton racket string pin processing technology, specifically a badminton racket string pin forming mold. Background Technology

[0002] Badminton racket string pins are an indispensable functional accessory in the badminton racket frame stringing system. They are installed inside the string holes of the racket frame and must simultaneously meet three core functions: "isolate the racket strings from the frame hole wall to reduce friction", "maintain string tension stability", and "withstand the instantaneous impact force when hitting the shuttlecock". Therefore, string pins have strict requirements for dimensional accuracy, structural strength and surface flatness.

[0003] A badminton racket string pin forming mold, disclosed in patent number "CN221622893U", includes a base, a mold base connected to the upper end of the base, a lower mold mounted on the middle of the upper end of the mold base, an arc-shaped groove on the upper end of the lower mold, and a first forming groove connected to the outer side of the arc-shaped groove, with long strip pins vertically connected inside the first forming groove, connecting posts inserted at the four corners of the outer side of the mold base, a top plate opposite to the upper end of the mold base, and an upper mold mounted on the lower end of the top plate, with a second forming groove inside the upper mold. The second forming groove corresponds vertically to the first forming groove and also includes a bubble elimination device located at the upper end of the top plate. The bubble elimination device includes a shell installed at the upper end of the top plate, a feed hopper connected to the top of the shell, a cylinder built inside the shell, hoses inserted into both sides of the upper end of the cylinder, an exhaust pipe connected to the outer end of the hoses, a filter frame located at the lower end of the shell, a transverse transmission assembly located at the rear side of the shell and connected to the rear end of the cylinder, and intermittent push-pull assemblies installed on the left and right sides of the transverse transmission assembly. The lower end of the shell is connected to the middle of the upper end of the top plate.

[0004] However, the above-mentioned device still has the following problems during implementation: 1. Traditional wire nail molds often use a "single cylinder + cantilever" structure for the upper mold drive mechanism. This means that the upper mold is driven to move down by only a single cylinder or electric push rod. The upper mold is only subjected to force on one side. During the mold closing process, it is prone to "nodding" tilting due to inertia or assembly gaps. This causes misalignment between the upper mold pressure head and the lower mold forming cavity, which directly results in deviations in the wall thickness of the wire nail. Some wire nails break when threading due to excessively thin walls. At the same time, the mold closing and sealing of traditional molds rely solely on the fit of the template and lack a precise positioning structure. 2. Most molds do not have an automatic spring-loaded material removal structure. Operators need to manually pry off the formed wire nails with tools such as tweezers and ejector pins. This not only results in a long material removal time per mold, but also easily causes damage and deformation of the wire nail edges due to improper operation. Some molds equipped with spring-loaded structures use only a single set of springs for support, resulting in uneven distribution of elasticity and often causing the wire nails to be partially ejected and partially left behind. 3. The existing molds mostly use bolts to fix the lower mold plate and the lower mold box or use an integrated processing structure. When it is necessary to produce wire nails of different diameters and lengths, the entire lower mold assembly needs to be replaced, which is not practical and is not convenient to operate. Summary of the Invention

[0005] The purpose of this invention is to provide a mold for processing badminton racket string pins, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A badminton racket string pin forming mold includes a base unit, a drive unit, a forming unit, an exhaust vibration component, and a rebound material picking component. The base unit includes a base and a frame column. The frame column is vertically fixed to one side of the top surface of the base. Two sets of frame columns are symmetrically arranged, and the tops of the two sets of frame columns are connected to a top plate. The drive unit includes an electric push rod, a top mold box, and a positioning slide rod, which are fixedly connected to the center of the top plate. The output end of the electric push rod passes through the top plate and is fixedly connected to the top of the top mold box. The positioning slide rod is symmetrically arranged and slidably connected to the frame column. The top surface of the top mold box is fixedly connected to the bottom surface of the positioning slide rod on both sides. The molding unit includes an upper mold assembly and a lower mold box assembly. The upper mold assembly is movably connected to the bottom surface of the top mold box. A bottom box is provided on the upper surface of the base. The lower mold box assembly is embedded inside the bottom box. The lower mold box assembly includes a lower mold box and a lower template. The lower template is movably connected to the inside of the lower mold box. The spring-loaded material receiving assembly is located inside the bottom box and on both sides of the lower mold box assembly. The spring-loaded material receiving assembly includes a spring-loaded spring and a lifting plate. The lifting plate is slidably connected inside the lower mold box assembly. The bottom end of the spring-loaded spring is fixedly connected to the center position of the upper surface of the base. A spring-loaded plate is fixedly installed on the top of the spring-loaded spring. The spring-loaded plate and the bottom surface of the lifting plate are matched.

[0007] Preferably, the top of the frame column is connected to a top rod, and two sets of mounting rods are fixedly connected to one side of the top rod. The bottom surfaces of the mounting rods are fixedly connected to both sides of the top surface of the top plate. The top two sides of the top plate are connected to a feeding port, and the top of the upper mold assembly is connected to a filling port corresponding to the feeding port. The feeding port and the filling port are connected to each other.

[0008] Preferably, the frame column is provided with a sliding groove, and a slider is fixedly connected to one end of the positioning slide rod. The slider is slidably sleeved on the sliding groove. When the output shaft end of the electric push rod drives the upper mold assembly to press down, the synchronous sliding of the positioning slide rod increases the stability during sliding, making the injection molding performance more stable.

[0009] Preferably, two sets of support plates are symmetrically and fixedly connected on both sides inside the lower mold box. The lower template is snapped onto the upper surface of the support plate. The upper surface of the support plate is symmetrically provided with slots. The bottom surface of the lower template is fixedly installed with blocks on both sides. The blocks snap into the slots. The snapping method makes it easy to replace the lower template.

[0010] Preferably, the upper mold assembly is provided with a liquid injection port at the top, the upper mold assembly is matched with the lower mold plate, the lower mold plate is provided with inverted trapezoidal guide grooves at equal intervals inside, the lower mold plate is provided with at least one set of wire nail forming cavities inside, the guide grooves are connected to each wire nail forming cavity, the inner wall of the forming cavity is provided with a demolding slope, and the bottom is provided with venting microholes.

[0011] Preferably, the lifting plate abuts against the bottom surface of the lower mold box assembly. When the mold is closed, the lifting plate moves downward with the lower mold box assembly to compress the spring spring. When the mold is opened, the spring spring resets and drives the lifting plate to lift the lower mold box assembly, thereby realizing the spring-loaded material removal of the finished wire nail. Multiple sets of auxiliary springs are equidistantly arranged on the upper surface of the base. The auxiliary springs are matched with the spring springs, and the tops of the multiple sets of auxiliary springs abut against the bottom surface of the lower mold box assembly.

[0012] Preferably, the upper mold assembly includes an upper template and a wear-resistant pressure head at its bottom that is adapted to the shape of the wire nail. Multiple sets of wear-resistant pressure heads are equidistantly arranged, and all sets of wear-resistant pressure heads are fixedly connected to the bottom surface of the upper template. The four corners of the top of the upper template are fixedly connected to snap-fit ​​blocks, which are matched and snap-fitted into snap-fit ​​holes on the bottom surface of the inner side of the top mold box. The wear-resistant pressure head is a tungsten carbide alloy wear-resistant pressure head.

[0013] Preferably, the top and side surfaces of the bottom box are provided with sliding grooves that match the lifting plate. The two sides of the lifting plate are symmetrically and fixedly connected with upright plates. The two sides of the upright plates are fixedly installed with docking sliders. The inner wall of the sliding groove on the side of the bottom box is provided with a docking groove. The docking slider is slidably connected to the inner wall of the docking groove. The top surface of the bottom box is located on both sides of the sliding groove and is engaged with both sides of the bottom surface of the top mold box.

[0014] Preferably, the bottom surface of the top mold box is symmetrically provided with fixed limit clamping blocks on both sides, and the top surface of the bottom box is symmetrically provided with limit clamping holes on both sides of the sliding groove. When the top mold box and the bottom box are closed, the limit clamping blocks are engaged inside the limit clamping holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This badminton racket string pin forming mold significantly improves forming accuracy and stability. By opening a groove in the frame column and cooperating with the slider of the positioning slide rod to achieve synchronous guidance, the offset of the upper mold assembly during the mold closing process is stably controlled, the dimensional tolerance of the string pin after injection molding is stable, and the defect rate is reduced. At the same time, the top mold box and the bottom box are precisely engaged by the limiting clamping block and the clamping hole, the mold closing sealing gap is small, and the problem of plastic leakage is completely avoided. 2. This badminton racket string pin processing mold optimizes both demolding efficiency and finished product integrity. It adopts a composite spring structure of "rebound spring + auxiliary spring + lifting plate". When the mold is closed, the spring group is evenly compressed and stores energy. When the mold is opened, it can provide a stable upward force, so that the lower mold box assembly moves upward synchronously. The finished string pin can be completely ejected from the forming cavity, shortening the material handling time and reducing the breakage and deformation rate of the string pin. 3. This badminton racket string pin forming mold enhances mold versatility and reduces maintenance costs. The lower template is quickly engaged with the lower mold box support plate via a locking block, making it convenient and quick to replace lower templates of different specifications without disassembling the lower mold box body, thus reducing mold component costs. At the same time, the upper template of the upper mold assembly is engaged with the top mold box via a locking block, making the replacement of the wear-resistant pressure head more convenient. 4. This badminton racket string pin processing mold improves both molding quality and mold life. The inverted trapezoidal guide groove design of the lower mold plate reduces the flow resistance of the injection molding material. Combined with the venting micropores at the bottom of the molding cavity, the injection gas can be quickly discharged, reducing the string pin bubble defect rate. The wear-resistant pressure head is made of tungsten steel alloy, which has high hardness and extends the overall service life of the mold for continuous production. 5. This badminton racket string pin processing mold improves production continuity and ease of operation. The material inlet of the top plate is precisely aligned with the injection port of the upper mold component, enabling continuous injection and shortening the single-mold injection time. The synchronous sliding structure of the positioning slide rod eliminates the need for operators to frequently calibrate the mold alignment, reducing operational intensity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is an exploded view of the main structure of the present invention; Figure 3 This is a schematic diagram of the main structure of the base portion of the present invention; Figure 4 This is a schematic front view of the lifting plate portion of the present invention; Figure 5 This is a top view of the lifting plate portion of the present invention. Figure 6 This is a top view of the bottom box portion of the present invention; Figure 7This is a schematic diagram of the main structure of the top mold box part of the present invention; Figure 8 This is a partial exploded structural diagram of the lower mold box assembly of the present invention.

[0017] In the diagram: 1. Base; 2. Frame column; 3. Top plate; 301. Feed inlet; 4. Electric push rod; 5. Top mold box; 6. Positioning slide rod; 7. Upper mold assembly; 701. Injection port; 702. Upper template; 703. Wear-resistant pressure head; 8. Lower mold box assembly; 801. Lower mold box; 802. Lower template; 9. Base box; 10. Rebound spring; 11. Lifting plate; 12. Rebound plate; 13. Auxiliary spring; 14. Push rod; 15. Mounting rod; 16. Slide groove; 17. Slider; 18. Support plate; 19. Slot; 20. Locking block; 21. Locking block; 22. Sliding groove; 23. Vertical plate; 24. Connecting slider; 25. Connecting groove; 26. Limiting locking block; 27. Limiting locking hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-5 The present invention provides a technical solution: Example 1: A badminton racket string pin processing and forming mold includes a base unit, a drive unit, a forming unit, an exhaust vibration component and a rebound material picking component. The base unit includes a base 1 and a frame column 2. The frame column 2 is vertically fixed to one side of the top surface of the base 1. Two sets of frame columns 2 are symmetrically arranged, and the tops of the two sets of frame columns 2 are connected to a top plate 3. The drive unit includes an electric push rod 4, a top mold box 5, and a positioning slide rod 6, which are fixedly connected to the center of the top plate 3. The output end of the electric push rod 4 passes through the top plate 3 and is fixedly connected to the top of the top mold box 5. The positioning slide rod 6 is symmetrically arranged and slidably connected to the frame column 2. The top surfaces of the top mold box 5 are fixedly connected to the bottom surfaces of the positioning slide rod 6. The molding unit includes an upper mold assembly 7 and a lower mold box assembly 8. The upper mold assembly is movably connected to the bottom surface of the top mold box 5. A bottom box 9 is provided on the upper surface of the base 1. The lower mold box assembly 8 is embedded in the bottom box 9. The lower mold box assembly 8 includes a lower mold box 801 and a lower template 802. The lower template 802 is movably connected to the inside of the lower mold box 801. The spring-loaded assembly is located inside the base box 9 and on both sides of the lower mold box assembly 8. The spring-loaded assembly includes a spring-loaded spring 10 and a lifting plate 11. The lifting plate 11 is slidably connected inside the lower mold box assembly 8. The bottom end of the spring-loaded spring 10 is fixedly connected to the center position of the upper surface of the base 1. A spring-loaded plate 12 is fixedly installed on the top of the spring-loaded spring 10. The spring-loaded plate 12 and the bottom surface of the lifting plate 11 are matched.

[0020] Example 2: In this embodiment, the frame column 2 of Embodiment 1 is described in detail. The top of the frame column 2 is connected to a push rod 14. Two sets of mounting rods 15 are fixedly connected to one side of the push rod 14. The bottom surfaces of the mounting rods 15 are fixedly connected to both sides of the top surface of the top plate 3. The top two sides of the top plate 3 are connected to the feed inlet 301. The top of the upper mold assembly 7 is connected to the feed inlet 301. The feed inlet 301 and the feed inlet 701 are connected to each other, which improves the continuity of production and the convenience of operation. The feed inlet 301 of the top plate 3 and the feed inlet 701 of the upper mold assembly 7 are precisely connected to achieve continuous injection and shorten the single mold injection time. A groove 16 is provided on the frame column 2. A slider 17 is fixedly connected to one end of the positioning slide rod 6. The slider 17 is slidably sleeved on the groove 16. When the output shaft of the electric push rod 4 drives the upper mold assembly 7 to press down, the synchronous sliding of the positioning slide rod 6 increases the stability during sliding, making the injection molding performance more stable. By providing a groove 16 on the frame column 2 and cooperating with the slider 17 of the positioning slide rod 6 to achieve synchronous guidance, the offset of the upper mold assembly 7 during the mold closing process is stably controlled. The dimensional tolerance of the wire nails after injection molding is stable, and the defect rate is reduced. The synchronous sliding structure of the positioning slide rod 6 eliminates the need for operators to frequently calibrate the mold alignment, reducing the intensity of operation. Two sets of support plates 18 are symmetrically and fixedly connected on both sides inside the lower mold box 801. The lower template 802 is snapped onto the upper surface of the support plate 18. The upper surface of the support plate 18 is symmetrically provided with slots 19. The bottom surface of the lower template 802 is fixedly installed with blocks 20 on both sides. The blocks 20 snap into the slots 19. The snap-fit ​​method makes the lower template 802 easy to replace, enhances the versatility of the mold, and reduces maintenance costs. The lower template 802 can be quickly snapped into the support plate 18 of the lower mold box 801 through the blocks 20. It is convenient and quick to replace the lower template 802 of different specifications without disassembling the main body of the lower mold box 801, thus reducing the cost of mold parts. The upper mold assembly 7 is provided with an injection port at the top. The upper mold assembly 7 is matched with the lower mold plate 802. The lower mold plate 802 has inverted trapezoidal guide grooves equidistantly opened inside. The lower mold plate 802 has at least 12 sets of wire nail forming cavities inside. The guide grooves are connected to each wire nail forming cavity. The inner wall of the forming cavity is provided with a demolding draft angle. The bottom is provided with venting micro-holes. The molding quality and mold life are improved simultaneously. The inverted trapezoidal guide groove design of the lower mold plate 802 reduces the flow resistance of the injection molding material. Combined with the venting micro-holes at the bottom of the forming cavity, the injection molding gas can be quickly discharged, reducing the wire nail bubble defect rate. The ejector plate 11 abuts against the bottom surface of the lower mold box assembly 8. When the mold is closed, the ejector plate 11 moves downward with the lower mold box assembly 8 to compress the spring spring 10. When the mold is opened, the spring spring 10 resets and drives the ejector plate 11 to lift the lower mold box assembly 8, thus realizing the pop-up removal of the finished wire nail. Multiple sets of auxiliary springs 13 are equidistantly arranged on the upper surface of the base 1. The auxiliary springs 13 are matched with the spring springs 10. The tops of the multiple sets of auxiliary springs 13 abut against the bottom surface of the lower mold box assembly 8. The demolding efficiency and the integrity of the finished product are optimized. The composite spring structure of "spring spring, auxiliary spring, and ejector plate" is adopted. When the mold is closed, the spring group is uniformly compressed and stores energy. When the mold is opened, it can provide a stable upward force, so that the lower mold box assembly 8 moves upward synchronously. The finished wire nail can be completely popped out of the molding cavity, the material removal time is shortened, and the wire nail breakage and deformation rate are reduced.

[0021] Example 3: In this embodiment, the upper mold assembly 7 of Embodiment 1 is described in detail. The upper mold assembly 7 includes an upper template 702 and a wear-resistant pressure head 703 adapted to the shape of the wire nail at its bottom. Multiple sets of wear-resistant pressure heads 703 are equidistantly arranged, and multiple sets of wear-resistant pressure heads 703 are fixedly connected to the bottom surface of the upper template 702. The four corners of the top of the upper template 702 are fixedly connected to the snap-fit ​​blocks 21, which are matched and snap-fitted into the snap-fit ​​holes on the bottom surface of the inner side of the top mold box 5. The wear-resistant pressure head 703 is made of tungsten carbide alloy wear-resistant pressure head. The upper template 702 of the upper mold assembly 7 is snap-fitted to the top mold box 5 through the snap-fit ​​blocks 21. The replacement of the wear-resistant pressure head 703 is also more convenient. The wear-resistant pressure head 703 is made of tungsten carbide alloy material, which has strong hardness and extends the overall service life of the continuous production mold. The top and sides of the bottom box 9 are fitted with sliding grooves 22 that match the lifting plate 11. The two sides of the lifting plate 11 are symmetrically and fixedly connected with upright plates 23. The two sides of the upright plates 23 are fixedly installed with connecting sliders 24. The inner wall of the sliding groove 22 on the side of the bottom box 9 is provided with a connecting groove 25. The connecting sliders 24 are slidably connected to the inner wall of the connecting groove 25. The top surface of the bottom box 9 is located on both sides of the sliding groove 22 and is engaged with both sides of the bottom surface of the top mold box 5. Limiting blocks 26 are symmetrically fixedly installed on both sides of the bottom surface of the top mold box 5. Limiting holes 27 are symmetrically opened on both sides of the top surface of the bottom box 9 located in the sliding groove 22. When the top mold box 5 and the bottom box 9 are closed, the limiting blocks 26 are engaged inside the limiting holes 27. The top mold box 5 and the bottom box 9 are precisely engaged by the limiting blocks 26 and the limiting holes 27, resulting in a small mold closing sealing gap and completely avoiding the problem of injection molding leakage.

[0022] Working principle: The operator first checks the stability of the foundation structure, such as the base 1 and the frame column 2. Then, according to the specifications of the wire nails, the operator selects the appropriate lower template 802 and upper mold assembly 7. The lower template 802 is inserted into the slot 19 of the support plate 18 of the lower mold box 801 through the bottom locking block 20. The upper mold assembly 7 is fixed in the top mold box 5 through the locking block 21, ensuring that the wear-resistant pressure head 703 of the upper mold is accurately aligned with the forming cavity of the lower mold. Finally, the operator checks the smooth sliding of auxiliary components such as the rebound spring 10 and the lifting plate 11, completes the pre-production preparation, and starts the control. After the system is in operation, the electric push rod 4 drives the top mold box 5 to move the upper mold assembly 7 downward. The positioning slide rod 6 slides synchronously along the slide groove 16 of the frame column 2 through the slider 17 to ensure that the upper mold plate 702 moves downward smoothly. When the top mold box 5 is in contact with the bottom box 9, the limit clamping block 26 is engaged with the limit clamping hole 27 to achieve a sealing lock. Then the injection molding equipment injects the molten raw material through the feed port 301 of the top plate 3 and the injection port 701 of the upper mold. The raw material is evenly distributed to each wire nail forming cavity through the guide groove of the lower mold plate 802. At the same time, the air in the forming cavity is discharged through the exhaust micro hole. After the raw material is filled, the cooling system of the lower mold box 801 is activated to force-cool the raw material in the molding cavity, so that the raw material solidifies from the molten state into the shape of a wire nail. During the cooling process, the mold remains closed, and the locking action of the limit clamping block 26 prevents the mold from shifting, ensuring the stability of the wire nail forming size until the raw material is completely solidified. After cooling, the electric push rod 4 drives the top mold box 5 and the upper mold assembly 7 to move upward to open the mold. The compressed spring spring 10 and the auxiliary spring 13 release their elasticity, pushing the spring plate 12 and the lifting plate 11 to move the lower mold box assembly 8 upward. The finished wire nail is ejected from the molding cavity, and the operator can directly collect the finished product. If it is necessary to change the wire nail specification, simply remove the old lower template 802, replace it with a new template and recalibrate it to start the next round of production.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, goods, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, goods, or apparatus. It should also be noted that the electric push rod 4, the top mold box 5, the upper mold assembly 7, and the lower mold box assembly 8 are existing devices or equipment, or devices or equipment that can be implemented by existing technology. Their power supply, specific composition, and principle are clear to those skilled in the art, so they will not be described in detail.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold for forming badminton racket string pins, comprising a base unit, a drive unit, a forming unit, an exhaust vibration assembly, and a rebound material picking assembly, characterized in that: The base unit includes a base (1) and a frame column (2). The frame column (2) is vertically fixed to one side of the top surface of the base (1). Two sets of frame columns (2) are symmetrically arranged, and the top of the two sets of frame columns (2) are connected to a top plate (3). The drive unit includes an electric push rod (4), a top mold box (5), and a positioning slide rod (6) fixedly connected to the center of the top plate (3). The output end of the electric push rod (4) passes through the top plate (3) and is fixedly connected to the top of the top mold box (5). The positioning slide rod (6) is symmetrically arranged and slidably connected to the frame column (2). The top surface of the top mold box (5) is fixedly connected to the bottom surface of the positioning slide rod (6) on both sides. The molding unit includes an upper mold assembly (7) and a lower mold box assembly (8). The upper mold assembly is movably connected to the bottom surface of the top mold box (5). A bottom box (9) is provided on the upper surface of the base (1). The lower mold box assembly (8) is embedded in the bottom box (9). The lower mold box assembly (8) includes a lower mold box (801) and a lower template (802). The lower template (802) is movably connected to the inside of the lower mold box (801). The spring-loaded assembly is located inside the base box (9) and on both sides of the lower mold box assembly (8). The spring-loaded assembly includes a spring-loaded spring (10) and a lifting plate (11). The lifting plate (11) is slidably connected inside the lower mold box assembly (8). The bottom end of the spring-loaded spring (10) is fixedly connected to the center of the upper surface of the base (1). A spring-loaded plate (12) is fixedly installed on the top of the spring-loaded spring (10). The spring-loaded plate (12) and the bottom surface of the lifting plate (11) are matched.

2. The badminton racket string pin forming mold according to claim 1, characterized in that: The top of the frame column (2) is connected to a top rod (14). Two sets of mounting rods (15) are fixedly connected to one side of the top rod (14). The bottom surfaces of the mounting rods (15) are fixedly connected to both sides of the top surface of the top plate (3). The top two sides of the top plate (3) are connected to the feed inlet (301). The top of the upper mold assembly (7) is connected to the feed inlet (301) and the injection port (701) are connected. The feed inlet (301) and the injection port (701) are connected.

3. The badminton racket string pin forming mold according to claim 1, characterized in that: The frame column (2) is provided with a sliding groove (16). One end of the positioning slide rod (6) is fixedly connected to a slider (17). The slider (17) is slidably sleeved on the sliding groove (16). When the output shaft end of the electric push rod (4) drives the upper mold assembly (7) to press down, the positioning slide rod (6) slides synchronously, increasing the stability during sliding and making the injection molding performance more stable.

4. The badminton racket string pin forming mold according to claim 1, characterized in that: The lower mold box (801) has two sets of support plates (18) symmetrically and fixedly connected on both sides inside. The lower template (802) is snapped onto the upper surface of the support plate (18). The upper surface of the support plate (18) is symmetrically provided with slots (19). The bottom surface of the lower template (802) is fixedly installed with blocks (20). The blocks (20) are snapped into the slots (19). The snapping method makes it easy to replace the lower template (802).

5. The badminton racket string pin forming mold according to claim 1, characterized in that: The upper mold assembly (7) is provided with a liquid injection port at the top. The upper mold assembly (7) is matched with the lower mold plate (802). The lower mold plate (802) is provided with inverted trapezoidal guide grooves at equal intervals inside. The lower mold plate (802) is provided with at least 12 sets of wire nail forming cavities inside. The guide grooves are connected to each wire nail forming cavity. The inner wall of the forming cavity is provided with a demolding slope and the bottom is provided with exhaust micro-holes.

6. The badminton racket string pin forming mold according to claim 1, characterized in that: The lifting plate (11) abuts against the bottom surface of the lower mold box assembly (8). When the mold is closed, the lifting plate (11) moves down with the lower mold box assembly (8) to compress the spring spring (10). When the mold is opened, the spring spring (10) resets and drives the lifting plate (11) to lift the lower mold box assembly (8), thereby realizing the spring-loaded material of the finished wire nail. Multiple sets of auxiliary springs (13) are equidistantly arranged on the upper surface of the base (1). The auxiliary springs (13) are matched with the spring springs (10). The tops of the multiple sets of auxiliary springs (13) abut against the bottom surface of the lower mold box assembly (8).

7. The badminton racket string pin forming mold according to claim 1, characterized in that: The upper mold assembly (7) includes an upper template (702) and a wear-resistant pressure head (703) adapted to the shape of a wire nail at its bottom. Multiple sets of wear-resistant pressure heads (703) are equidistantly arranged, and multiple sets of wear-resistant pressure heads (703) are fixedly connected to the bottom surface of the upper template (702). The four corners of the top of the upper template (702) are fixedly connected to snap-fit ​​blocks (21), and the snap-fit ​​blocks (21) are matched and snap-fitted into the snap-fit ​​holes on the bottom surface of the inner side of the top mold box (5). The wear-resistant pressure head (703) is a tungsten carbide alloy wear-resistant pressure head.

8. The badminton racket string pin forming mold according to claim 1, characterized in that: The top and side surfaces of the bottom box (9) are fitted with sliding grooves (22) that match the lifting plate (11). The two sides of the lifting plate (11) are symmetrically and fixedly connected with upright plates (23). The two sides of the upright plates (23) are fixedly installed with docking sliders (24). The inner wall of the sliding groove (22) on the side of the bottom box (9) is provided with a docking groove (25). The docking slider (24) is slidably connected to the inner wall of the docking groove (25). The top surface of the bottom box (9) is located on both sides of the sliding groove (22) and is engaged with both sides of the bottom surface of the top mold box (5).

9. A badminton racket string pin forming mold according to claim 8, characterized in that: The top mold box (5) has symmetrically fixedly installed limit clamping blocks (26) on both sides of the bottom surface. The bottom box (9) has symmetrically opened limit clamping holes (27) on both sides of the sliding groove (22) on the top surface. When the top mold box (5) and the bottom box (9) are closed, the limit clamping blocks (26) are engaged inside the limit clamping holes (27).

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