Watch buckle precision forming die for watch

Abstract

The invention belongs to the field of watch molds, and provides a watch buckle precision forming mold for a watch, the watch buckle precision forming mold comprises an upper mold, a lower mold, an upper mold base and a lower mold base, the outer side of the lower mold base is provided with an automatic feeding model and an adjusting assembly; the lower die comprises a first blank cavity, a second blank cavity, a first female die and a second female die, the upper die comprises a first blank contour punching cutter, a second blank contour punching cutter, a first male die and a second male die, and the first female die and the first male die are matched in a stamping mode and used for forming a watch buckle inlay. The second female die and the second male die are matched in a stamping mode and used for forming a watch buckle embedded shell. And a material returning mechanism which is vertically and movably matched with the upper die holder is arranged on the upper die holder. The device is reasonable in design, facilitates automatic feeding, can produce novel hollow watch buckles, can realize double-punching forming, is beneficial to guaranteeing the quality of the watch buckles, and is suitable for large-scale popularization.

Description

Technical Field

[0001] The invention belongs to the field of watch moulds, and in particular relates to a precision moulding mould for a watch buckle. Background Art

[0002] The clasp is the movable middle part of a watch strap, primarily used to secure the watch strap and ensure it stays securely on the wrist. Clasps can be broadly categorized as pin buckles, folding buckles, adjustable buckles, butterfly buckles, slide buckles, and nylon buckles. Besides punching, the primary forming step for clasps is stamping.

[0003] Stamping is an operation in the field of mechanical processing that places great emphasis on safety. Due to the small size of the watch buckle, the blanks used are also relatively small. Most workshops use manual loading, which is inefficient on the one hand and increases the probability of safety hazards on the other hand. In addition, most watch buckle molds are single-punch molds. After stamping, they need secondary clamping to punch out excess edge material, which increases the turnover of the workpiece. The error of the secondary clamping will affect the precision of the watch buckle, thereby affecting the quality of the watch buckle, and it is difficult to meet the requirements of large-scale standardized production. Secondly, although the watch buckle products produced by existing watch buckle molds have different shapes, they are all solid products. If the end of the watch buckle is fixed with screws, the only design that can be used is a through-hole design. Unless a spring pin is used as the connecting shaft, it is difficult to achieve a concealed connection. The common problem of spring pins as connecting shafts is that they are easy to deform and have a short service life. Summary of the Invention

[0004] In response to the technical problems existing in the above-mentioned watch buckle mold, the present invention proposes a watch buckle precision molding mold with reasonable design, convenient automatic loading, capable of producing new hollow watch buckles, capable of double-punching molding and conducive to ensuring the quality of the watch buckle.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: the present invention provides a precision molding mold for a watch buckle, comprising an upper mold and a lower mold, wherein the upper mold and the lower mold are respectively arranged on an upper mold base and a lower mold base, an automatic feeding model is arranged on the outer side of the lower mold base, and feeding ports for feeding are arranged on the left and right sides of the automatic feeding model, and a plurality of adjustment components for adjusting the center position of the lower mold base are arranged on the side of the automatic feeding model; the lower mold comprises a first blank cavity and a second blank cavity staggered on the left and right, a first concave mold below the top level thereof is arranged in the first blank cavity, and a second concave mold below the top level thereof is arranged in the second blank cavity, and the upper mold comprises The first blank contour punching knife and the second blank contour punching knife are staggered on the left and right, the first blank contour punching knife is provided with a first punch inside, the second blank contour punching knife is provided with a second punch inside, the first die is stamped together with the first punch and is used to form a watch buckle inlay, the second die is stamped together with the second punch and is used to form a watch buckle inlay shell; the upper die base is provided with a material return mechanism that is vertically movable with it, the material return mechanism includes a fixed sleeve, the bottom of the fixed sleeve is provided with a material return knife located between the first blank contour punching knife and the first punch and between the second blank contour punching knife and the second punch, and the upper die base is provided with an entry and exit port for relative displacement of the material return knife and the upper die base.

[0006] Preferably, the thickness of the first punch is greater than the depth of the first die, and the thickness of the second punch is greater than the depth of the second die.

[0007] Preferably, the first punch and the second punch are both arched H-shaped structures, the stripping knife is arranged on the knife handle, the knife handle is fixedly connected to the fixed sleeve, the stripping knife cooperates with the H-shaped opening of the first punch and the H-shaped opening of the second punch, the thickness of the stripping knife located between the first blank contour punching knife and the first punch is equal to the gap width between the first blank contour punching knife and the first punch, and the thickness of the stripping knife located between the second blank contour punching knife and the second punch is equal to the gap width between the second blank contour punching knife and the second punch.

[0008] Preferably, the upper die base is provided with an air ring sleeve which is nested and matched with the upper die base, and the air ring sleeve is synchronously connected with multiple air channels arranged inside the upper die base, and the air outlet of the air channel is arranged between the first blank contour punching knife and the first punch and between the second blank contour punching knife and the second punch.

[0009] Preferably, the bottom surface of the upper die base and the top surface of the lower die base are both circular and the diameter of the circle is greater than the maximum diagonal length of the first blank cavity and the second blank cavity, and the area of ​​the circle is greater than the sum of the areas of the first blank cavity and the second blank cavity.

[0010] Preferably, a pair of support blocks are provided on both sides above the material outlet, a shaping plate is provided on the support blocks, a plurality of inlays are provided at the bottom of the shaping plate, and a pressure plate is provided in the inlays.

[0011] Preferably, the shaping plate is provided with a pair of screw holes near its end, and an elastic support arm connected to the screw hole by screws is provided above the screw hole. The elastic support arm is a Z-shaped structure and its end faces the stamping direction of the upper mold base and the lower mold base.

[0012] Preferably, a bull's eye ball bearing and a rolling roller are provided at the end of the elastic support arm, and the length of the rolling roller is greater than the diameter of the bull's eye ball bearing.

[0013] Preferably, exhaust holes are provided between the first blank cavity and the first die, and between the second blank cavity and the second die.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are: The present invention provides a precision forming mold for a watch buckle. By adopting a double-punch design for the upper and lower molds, it can realize the operations of punching blanks from the material and stamping and forming. This reduces the turnover number of the workpiece, widens the material loading area, and can automatically load and unload the material. It is highly safe and can improve production efficiency and ensure product quality. The inner cavity formed by the embedded stamped watch buckle inlay and the watch buckle shell can conceal the screw at the end of the shaft eye, which is conducive to ensuring the aesthetics and service life of the watch buckle. The present invention has a reasonable design, is convenient for automatic loading, can produce a new type of hollow watch buckle, can realize double-punch forming, and is conducive to ensuring the quality of the watch buckle. It is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A front view of a precision molding die and material for a watch buckle provided in an embodiment; Figure 2 A three-dimensional diagram of a precision molding die and material for a watch buckle provided in an embodiment; Figure 3 A side view of a precision molding die for a watch buckle provided in an embodiment; Figure 4 for Figure 3 A cross-sectional view of a precision molding die for a watch buckle taken along the AA axis; Figure 5 A top view of a precision molding die for a watch buckle provided in an embodiment; Figure 6 A bottom view of a precision molding die for a watch buckle provided in an embodiment; Figure 7 A three-dimensional diagram of the lower die base and the lower die provided in the embodiment; Figure 8 A top view of the lower die base and the lower die provided in the embodiment; Figure 9 A bottom view of the upper die base and the upper die provided in the embodiment; Figure 10 A three-dimensional diagram of a material return mechanism provided in an embodiment; Figure 11 A perspective view of a clasp provided in an embodiment; In the above figures: 1. Upper mold; 11. First blank contour punching knife; 12. Second blank contour punching knife; 13. First punch; 14. Second punch; 2. Lower mold; 21. First blank cavity; 22. Second blank cavity; 23. First die; 24. Second die; 3. Upper mold base; 31. Inlet and outlet; 32. Air ring; 33. Air duct; 4. Lower mold base; 41. Exhaust hole; 5. Automatic feeding model; 51. Feeding port; 52. Support block; 53. Forming plate; 54. Pressing plate; 55. Elastic support arm; 56. Bull's eye ball bearing; 57. Rolling roller; 6. Adjustment assembly; 7. Buckle; 71. Buckle inlay; 72. Buckle shell; 8. Material removal mechanism; 81. Fixing sleeve; 82. Material removal knife; 83. Tool handle; 9. Material. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other unless they conflict. For the convenience of description, the words "upper", "lower", "left", and "right" appearing below only indicate the upper, lower, left, and right directions consistent with the drawings themselves and do not limit the structure.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Examples, such as Figures 1-11As shown, the present invention provides a precision molding mold for a watch buckle, comprising an upper mold 1 and a lower mold 2, wherein the upper mold 1 and the lower mold 2 are respectively arranged on an upper mold base 3 and a lower mold base 4, an automatic feeding model 5 is arranged on the outer side of the lower mold base 4, and feeding ports 51 for feeding are arranged on the left and right sides of the automatic feeding model 5, and a plurality of adjustment components 6 for adjusting the center position of the lower mold base 4 are arranged on the side of the automatic feeding model 5; the lower mold 2 comprises a first blank cavity 21 and a second blank cavity 22 staggered on the left and right, a first concave mold 23 below the top level thereof is arranged in the first blank cavity 21, and a second concave mold 24 below the top level thereof is arranged in the second blank cavity 22, and the upper mold 1 comprises a first blank contour punching knife 11 staggered on the left and right and the second blank contour punching knife 12, the first blank contour punching knife 11 is provided with a first punch 13 inside, the second blank contour punching knife 12 is provided with a second punch 14 inside, the first die 23 is stamped together with the first punch 13 and is used to form a watch buckle inlay 71, the second die 24 is stamped together with the second punch 14 and is used to form a watch buckle inlay shell 72; the upper die base 3 is provided with a material return mechanism 8 that is vertically movable with it, the material return mechanism 8 includes a fixed sleeve 81, and the bottom of the fixed sleeve 81 is provided with a material return knife 82 located between the first blank contour punching knife 11 and the first punch 13 and between the second blank contour punching knife 12 and the second punch 14, and the upper die base 3 is provided with an entry and exit port 31 for the material return knife 82 to make relative displacement with the upper die base 3.

[0020] Specifically, the automatic feeding model 5 is installed on the platform of the punching machine, and the two feeding ports 51 on the left and right sides thereof correspond to each other. The material 9 can step through the feeding port 51 under the action of traction. During the punching process, the material 9 remains stationary until the punching action is completed. The present invention adopts a double punching operation method to manufacture the watch buckle, and is used to produce the hollow watch buckle 7. The watch buckle inlay 71 and watch buckle shell 72 required for the hollow watch buckle are punched out of blanks of different areas, and these two blanks of different areas are punched out from the same sheet of material 9 at staggered positions. This can improve the utilization rate of the material 9 on the one hand, and ensure that the material 9 has sufficient width on the other hand to avoid deformation due to uneven tension.

[0021] Furthermore, the punching action of the upper mold 1 and the lower mold 2 provided by the present invention can directly correspond to the material 9 between the two, the lower mold 2 is installed on the lower mold base 4 to keep the position fixed, and the inner wall of the first blank cavity 21 and the second blank cavity 22 of the lower mold 2 is sprayed with a release agent; the upper mold 1 is installed at the punching lifting end of the punching machine, and the punching of the material 9 is achieved through the lifting action; the first blank contour punching knife 11 contacts the material 9 and punches out the blank for punching the buckle inlay 71 along the first blank cavity 21, and the second blank contour punching knife 12 contacts the material 9 and punches out the blank for punching the buckle inlay 71 along the second blank cavity 22 2 is punched out; the upper mold 1 continues to punch down to press one of the blanks into between the first die 23 and the first punch 13 until it is formed, and the other blank is pressed into between the second die 24 and the second punch 14 until it is formed; the upper mold 1 rises and carries the formed buckle inlay 71 and buckle shell 72 up and away from the lower mold 2. Before the upper mold 1 is about to be in place, the bottom end of the material return mechanism 8 contacts the buckle inlay 71 and the buckle shell 72. When the upper mold 1 is completely reset, the material return mechanism 8 ejects the buckle inlay 71 and the buckle shell 72 and leaves the upper mold 1, and the stamped workpiece is taken away by the movable chute of the punching machine.

[0022] The present invention provides a precision forming mold for a watch buckle, more specifically a double-punch forming mold for a hollow watch buckle. The upper mold 1 and lower mold 2, which adopt a double-punch design, can realize the operations of punching blanks and stamping from a material 9, reducing the turnover number of the workpiece and widening the specific loading area of ​​the material 9. It can automatically load and unload materials, has high safety, improves production efficiency and ensures product quality. The inner cavity formed by the nesting of the stamped watch buckle inlay 71 and the watch buckle shell 72 can be used to conceal the screw / nut at the end of the connecting shaft. The periphery of the watch buckle shell 72 can be vertically abutted against the periphery of the watch buckle inlay 71. The tenon of the connecting shaft / hinge shaft at the end of the watch buckle 7 passes through the shaft eye located on the inner side of the watch buckle shell 72. The screw / nut limits the two ends of the connecting shaft from the inside of the watch buckle shell 72. The watch buckle inlay 71 is then pressed onto the watch buckle shell 72. This is beneficial to ensuring the aesthetics of the watch buckle, facilitating secondary maintenance and maintenance, and ensuring the actual service life of the new product. The present invention provides a hollow watch buckle produced by a precision molding mold for a watch buckle. The thickness of the material 9 used for the watch buckle 7 is smaller than that of the solid watch buckle. After the nesting relationship is established, the hollow watch buckle can ensure that on the basis of the same mass or a smaller mass, a compression-resistant surface distributed along the nesting surface is formed, which has a certain compressive strength, and the hollow thickness of the watch buckle inlay 71 and the watch buckle shell 72 after nesting is maintained within a reasonable value such as 1-2mm, and has a certain anti-deformation ability; according to the design requirements of the entire watch buckle, the watch buckle product corresponding to the present invention is one of the components of the overall watch buckle. In order to form a snap-fit ​​relationship with other components, such as the butterfly buckle, there will be two raised parts in the middle to facilitate the snap-fit ​​and fixation of the folding buckle, so the second die 24 and the second punch 14 corresponding to the watch buckle inlay 71 may have corresponding surface designs.

[0023] In order to improve the stripping efficiency of stamping parts, the thickness of the first punch 13 provided by the present invention is greater than the depth of the first die 23, and the thickness of the second punch 14 is greater than the depth of the second die 24. This can ensure that the blank is completely and fully formed on the first punch 13 and the second punch 14 on the one hand, and on the other hand, it leaves sufficient stripping margin for the stripping knife 82, so that the stripping knife 82 can move along the top margin of the first punch 13 and the second punch 14 until the stamping part is pushed down.

[0024] In order to ensure the quality of the product, the first punch 13 and the second punch 14 provided by the present invention are both arched H-shaped structures, and the stripping knife 82 is arranged on the knife handle 83, and the knife handle 83 is fixedly connected to the fixed sleeve 81. The fixed sleeve 81 is fixedly connected to the frame / body part of the punching machine through a connecting rod. The interior of the fixed sleeve 81 and the upper die base 3 can move up and down relative to each other. The stripping knife 82 cooperates with the H-shaped opening of the first punch 13 and the H-shaped opening of the second punch 14. Each stripping knife 82 has a width of 2-5mm. The thickness of the stripping knife 82 located between the first blank contour punching knife 11 and the first punch 13 is equal to the gap between the first blank contour punching knife 11 and the first punch 13. The thickness of the stripping knife 82 located between the second blank contour punching knife 12 and the second punch 14 is equal to the gap between the second blank contour punching knife 12 and the second punch 14. Among them, the shape design of the first punch 13 and the second punch 14 is based on the appearance shape design requirements of the hollow watch buckle; designing the stripping contact node at the H-shaped mouth position of the first punch 13 and the second punch 14 is conducive to improving the uniformity of the stripping pressure and ensuring the demolding synchronization on both sides of the stamping part; the tool handle 83 provides an installation base for the stripping knife 82, and the stripping knife 82 can be fixed to the tool handle 83 with a countersunk screw. A plurality of holes are reserved on the tool handle 83 for connection, providing a margin for fine-tuning the stripping knife 82 up and down, and the tool handle 83 also provides a route for the stripping knife 82 to cooperate with the upper die seat 3, so that after the upper die seat 3 rises, the stripping knife 82 can enter the stripping gap in an orderly manner, and the thickness of the stripping knife 82 makes its two sides fully adhere to the gap between the first blank contour punching knife 11 and the first punch 13, and the gap between the second blank contour punching knife 12 and the second punch 14, avoiding obvious deformation and pits at the stripping node of the stamping part, which is conducive to ensuring the quality of the stamping part.

[0025] Furthermore, the upper die base 3 provided by the present invention is provided with an air ring 32 that is nested and matched therewith. The air ring 32 is synchronously connected to multiple air channels 33 provided inside the upper die base 3. The air outlets of the air channels 33 are provided between the first blank contour punching knife 11 and the first punch 13, and between the second blank contour punching knife 12 and the second punch 14. An air nozzle is provided on the outside of the air ring 32 and is used to connect to an air source. The air source provides a certain air pressure in all the air channels 33 through the air ring 32. On the one hand, it can assist with the stripping knife 82 to ensure that the stamped part has a balanced force on the stripping periphery. On the other hand, it can also provide a certain degree of treatment to the burrs of the stamped part, reduce the attachment of burrs to the stamped part and the die, and avoid the production of unintended brushed surfaces on the stamped part subsequently formed by the die.

[0026] In order to avoid the material 9 from being deformed during the stamping process, the bottom surface of the upper die base 3 and the top surface of the lower die base 4 provided by the present invention are both circular and the diameter of the circle is greater than the maximum diagonal length of the first blank cavity and the second blank cavity, and the circular area is greater than the sum of the areas of the first blank cavity 21 and the second blank cavity 22. In particular, the upper die base 3, after the upper die 1 and the lower die 2 are fully stamped into contact, the surface of the upper die base 3 can be infinitely close to the surface level of the material 9, avoiding the problem of the material 9 being deformed along the upper die 1 and the lower die 2, which is beneficial to ensuring the forming quality of subsequent stamping parts.

[0027] In order to improve the balance of the material 9, in addition to cooperating with the workshop's traction devices such as material rollers, the present invention also provides a structure on the automatic material feeding model 5 that can play a shaping role. Specifically, a pair of support blocks 52 are provided on both sides of the upper side of the material feeding port 51 provided by the present invention. A shaping plate 53 is provided on the support blocks 52. The bottom of the shaping plate 53 is provided with multiple inlays, and a pressure plate 54 is provided in the inlays. Among them, the support blocks 52 leave sufficient support height for the shaping plate 53. The top of the pressure plate 54 is embedded in the inlay to maintain stability. The bottom of the pressure plate 54 is polished and is used to slide in contact with the top surface of the material 9. The left and right lengths of the pressure plate 54 are greater than the diameter left after the blank is punched to avoid being stuck in the blank punching opening. In this way, the pressure plate 54 can play a certain role in limiting the feeding level of the material 9 in the two directions of the material feeding port 51, which is conducive to ensuring the balance of the material 9 and further conducive to improving its performance in cooperating with the upper mold 1 and the lower mold 2.

[0028] Furthermore, the shaping plate 53 provided by the present invention is provided with a pair of screw holes near its ends. Above the screw holes, elastic support arms 55 are provided, connected thereto by screws. The elastic support arms 55 are Z-shaped, with their distal ends oriented in the stamping direction of the upper and lower die bases 3 and 4. The elastic support arms 55 are supported by a resilient sheet of metal material. The supporting action of their distal ends allows the device to narrow the actual span of the horizontal position limiting applied to the top surface of the material 9, ensuring that the material 9 remains horizontal at the moment of punching and at the end of forming, avoiding significant bending deformation. This helps to ensure the quality of the passive traction and release of the material 9, as well as the stamping quality of subsequent products.

[0029] In order to improve the supporting performance of the elastic support arm 55 on the material 9, the elastic support arm 55 can produce elastic deformation at the moment when the material 9 shows a deformation tendency, which is beneficial for the material 9 to quickly return to the traction level within the balance range. In addition, in order to ensure the feeding performance of the material 9, the present invention provides a bull's eye ball bearing 56 and a rolling roller 57 at the end of the elastic support arm 55. The length of the rolling roller 57 is greater than the diameter of the bull's eye ball bearing 56. The rolling direction of the rolling roller 57 is consistent with the feeding direction of the material 9. A set of rolling rollers 57 and bull's eye ball bearings 56 contact the material 9 to form a line contact pair and a point contact pair, that is, to form a complete rolling support plane. The four rolling support planes formed by the four elastic support arms 55 are in the same plane in theoretical design, and maintain dynamic balance under the action of real-time pressure, thereby further balancing the feeding level of the material 9.

[0030] In order to ensure that the gas surrounded by the upper mold 1 and the lower mold 2 during the punching and forming stages is reasonably discharged, exhaust holes 41 are provided between the first blank cavity 21 and the first die 23, and between the second blank cavity 22 and the second die 24 provided by the present invention. For example, the gas inside the first blank cavity 21 and the first blank contour punching knife 11 can be discharged from the exhaust holes 41 from top to bottom to the platform surface of the stamping machine, which is beneficial to ensure the quality of the stamped parts.

[0031] In order to ensure the alignment quality of the upper mold 1 and the lower mold 2, the present invention can fine-tune the center position of the lower mold 2 in the automatic feeding model 5 by providing an adjustment component 6. The adjustment component 6 includes a push plate that radially fits the ring seat. The push plate is provided with a top screw, which is connected to the automatic feeding model 5. The lower mold seat 4 is arranged in the ring seat. By adjusting the top screw, the center position of the ring seat can be fine-tuned in a small range until the upper mold 1 and the lower mold 2 have the required alignment degree.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A precision molding die for a watch buckle, comprising an upper die and a lower die, wherein the upper die and the lower die are respectively arranged on an upper die base and a lower die base, characterized in that: An automatic material feeding model is provided on the outer side of the lower die base, and material feeding ports for feeding are provided on the left and right sides of the automatic material feeding model. A plurality of adjustment components for adjusting the center position of the lower die base are provided on the side of the automatic material feeding model; The lower mold includes a first blank cavity and a second blank cavity that are staggered on the left and right, a first concave mold below the top level of the first blank cavity is provided, and a second concave mold below the top level of the second blank cavity is provided, and the upper mold includes a first blank contour punching knife and a second blank contour punching knife that are staggered on the left and right, a first punch is provided inside the first blank contour punching knife, and a second punch is provided inside the second blank contour punching knife, the first concave mold is pressed together with the first punch and is used to form a watch buckle inlay, and the second concave mold is pressed together with the second punch and is used to form a watch buckle inlay shell; The upper die base is provided with a material return mechanism that cooperates with the upper die base in a vertical manner. The material return mechanism includes a fixed sleeve. The bottom of the fixed sleeve is provided with a material return knife located between the first blank contour punching knife and the first punch and between the second blank contour punching knife and the second punch. The upper die base is provided with an entry and exit port for relative displacement of the material return knife and the upper die base.

2. A precision forming mold for a watch buckle according to claim 1, characterized in that: The thickness of the first convex mold is greater than the depth of the first concave mold, and the thickness of the second convex mold is greater than the depth of the second concave mold.

3. A precision forming mold for a watch buckle according to claim 2, characterized in that: The first punch and the second punch are both arched H-shaped structures. The stripper knife is arranged on the knife handle, and the knife handle is fixedly connected to the fixed sleeve. The stripper knife cooperates with the H-shaped opening of the first punch and the H-shaped opening of the second punch. The thickness of the stripper knife located between the first blank contour punching knife and the first punch is equal to the gap width between the first blank contour punching knife and the first punch. The thickness of the stripper knife located between the second blank contour punching knife and the second punch is equal to the gap width between the second blank contour punching knife and the second punch.

4. A precision forming mold for a watch buckle according to claim 1 or 3, characterized in that: The upper die base is provided with an air ring sleeve that is nested and matched with it. The air ring sleeve is synchronously connected with multiple air channels arranged inside the upper die base. The air outlets of the air channels are arranged between the first blank contour punching knife and the first punch and between the second blank contour punching knife and the second punch.

5. A precision forming mold for a watch buckle according to claim 1, characterized in that: The bottom surface of the upper die base and the top surface of the lower die base are both circular, and the diameter of the circle is greater than the maximum diagonal length of the first blank cavity and the second blank cavity.

6. A precision forming mold for a watch buckle according to claim 1, characterized in that: A pair of support blocks are provided on both sides above the material outlet, a shaping plate is provided on the support blocks, a plurality of inlays are provided at the bottom of the shaping plate, and a pressing plate is provided in the inlays.

7. A precision forming mold for a watch buckle according to claim 6, characterized in that: The shaping plate is provided with a pair of screw holes near its end, and an elastic support arm connected to the screw hole is provided above the screw hole. The elastic support arm is a Z-shaped structure and its end faces the stamping direction of the upper mold base and the lower mold base.

8. A precision forming mold for a watch buckle according to claim 7, characterized in that: A bull's eye ball bearing and a rolling roller are provided at the end of the elastic support arm, and the length of the rolling roller is greater than the diameter of the bull's eye ball bearing.

9. The precision forming mold for a watch buckle according to claim 1, characterized in that: Vent holes are provided between the first blank cavity and the first die, and between the second blank cavity and the second die.

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