Watch middle frame injection mold

Abstract

The application discloses a watch middle frame injection mold, and relates to the field of injection molds, which comprises an upper mold assembly and a lower mold assembly, the upper mold assembly comprises an upper mold plate and an upper mold core, the lower mold assembly comprises a lower mold plate and a lower mold core, the upper mold core and the lower mold core form a middle frame mold cavity when they are closed, a first row position assembly is arranged on the symmetrical two sides of the middle frame mold cavity between the upper mold core and the lower mold core, the first row position assembly can enter the watch middle frame cavity in the transverse direction during the closing process, and the front end of the first row position assembly is provided with symmetrical and retractable needle cores; the needle hole can be directly formed during the injection process by arranging the symmetrical and retractable needle cores at the front end of the first row position assembly, the secondary processing procedure is avoided, the production procedure is reduced, the needle core can enter the cavity when the mold is closed and can be withdrawn when the mold is opened, thereby realizing the molding of the needle hole structure, ensuring the coaxiality of the needle holes on the two sides of the watch middle frame, improving the watchband assembly precision, and significantly improving the production efficiency and reducing the production cost.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold for a watch frame. Background Technology

[0002] With the development of smart wearable devices, smartwatches, sports watches, and electronic watches are becoming increasingly widespread. A typical watch structure includes components such as the watch crystal, watch frame, case back, and watch band. The watch frame not only supports the display module and button components but also plays a crucial role in connecting the watch band.

[0003] In existing technology, the watch frame is usually formed by injection molding. Strap connection structures are typically provided on both sides of the frame. These structures generally include buckle pin holes for mounting buckle pins, which are used to install a strap connecting shaft, allowing the strap to rotatably connect to the watch frame.

[0004] However, in the existing technology, pin holes are usually difficult to form directly during the injection molding process because: 1) pin holes are usually through holes; 2) pin holes have a small diameter; 3) pin holes are located in narrow areas on both sides of the middle frame; 4) pin holes need to ensure the coaxiality of the holes on both sides.

[0005] Therefore, in most manufacturing processes, after injection molding, the watch frame typically requires secondary processing via CNC machining or drilling to create the buckle pin holes. This processing method presents the following problems:

[0006] (1) Many production steps: After injection molding, a drilling process is required, which increases the production process;

[0007] (2) High processing cost: Drilling requires the use of special fixtures and CNC equipment, which increases production costs;

[0008] (3) The accuracy of the hole position is difficult to guarantee: During the drilling process, due to clamping error or processing error, the coaxiality of the holes on both sides is easily inconsistent, which affects the assembly of the watch strap;

[0009] (4) Low production efficiency: Adding secondary processing steps will significantly reduce overall production efficiency.

[0010] To address the aforementioned issues, some existing technologies propose improving the mold structure to achieve the forming of hole structures. For example, Chinese patent CN204525952U discloses an injection mold for forming watch dials, which uses a slider structure to form a lateral hole structure, utilizing the slider mechanism within the mold to form the side holes of the housing. However, this technology is mainly used to form button holes or functional holes, and does not address the buckle pin hole structure for watch strap connections.

[0011] For example, Chinese patent CN222891594U discloses a mold for processing the middle frame of a watch. The mold forms the middle frame structure by setting a sliding mechanism. However, the mold is still mainly used for injection molding of the outer shape of the middle frame and does not solve the problem of synchronous molding of the buckle pin holes of the watch strap.

[0012] Therefore, existing technologies still suffer from problems such as the need for secondary processing to form the buckle pin hole, complex production processes, difficulty in ensuring hole position accuracy, and low production efficiency. Therefore, this invention discloses an injection mold for the watch frame to solve the above problems. Summary of the Invention

[0013] Based on this, it is necessary to provide a watch frame injection mold to address the aforementioned technical problems. By setting symmetrical and retractable pin cores at the front end of the first row component, the buckle pin holes can be formed directly during the injection molding process, thereby avoiding secondary processing steps, reducing production steps, and enabling the pin cores to enter the cavity when the mold is closed and exit when the mold is opened, thus realizing the forming of the buckle pin hole structure. This ensures that the buckle pin holes on both sides of the watch frame are coaxial, improves the assembly accuracy of the watch strap, significantly improves production efficiency, and reduces production costs.

[0014] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0015] A watch frame injection mold includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper template and an upper mold core, and the lower mold assembly includes a lower template and a lower mold core. When the upper mold core and the lower mold core are closed, a mid-frame cavity is formed. A first sliding assembly is provided on both symmetrical sides of the mid-frame cavity between the upper mold core and the lower mold core. The first sliding assembly can enter the watch frame cavity laterally during the mold closing process. The front end of the first sliding assembly is provided with symmetrical and retractable pin cores. The pin cores are used to form buckle holes at the strap connection part of the watch frame, thereby forming buckle holes simultaneously during mid-frame injection molding.

[0016] In a preferred embodiment of the watch frame injection mold provided by the present invention, the first sliding component includes a sliding block, an intermediate block, a sliding seat, and a first sliding guide post. The intermediate block and the sliding block are connected and slidably connected to the upper mold core. The front end of the sliding block is provided with an arc-shaped shell, and the pin extends from both ends of the arc-shaped shell. The arc-shaped shell is used to form a groove for placing the watch strap in the watch frame. The first sliding guide post is inserted into the sliding seat and cooperates with the inclined surface structure. When the mold is closed, the first sliding guide post is inserted into the sliding seat, driving the sliding seat to move towards the middle frame mold cavity, thereby driving the intermediate block and the sliding block to move towards the middle frame mold cavity.

[0017] In a preferred embodiment of the watch frame injection mold provided by the present invention, the sliding block has a cavity inside, and symmetrically arranged needle seats are provided in the cavity. The needle core is fixed to the end of the needle seat and extends out from the opposite side of the two needle seats.

[0018] In a preferred embodiment of the watch frame injection mold provided by the present invention, a sliding guide is slidably connected inside the middle block. The rear end of the sliding guide is connected to the sliding seat, and the front end of the sliding guide is provided with a conical block. The conical block extends between the two needle seats and is slidably connected to the needle seats through a wedge-shaped slide rail. An elastic reset structure is provided between the sliding seat and the middle block. When the mold is closed, the sliding seat pushes the sliding guide to move toward the middle frame mold cavity, and the conical block opens the two needle seats, so that the needle core at the end of the needle seat extends out from the arc-shaped shell. When the mold is disassembled, the elastic reset structure acts on the sliding seat, so that the sliding guide moves away from the middle frame mold cavity, and the two needle seats contract, so that the needle core at the end of the needle seat contracts into the arc-shaped shell.

[0019] In a preferred embodiment of the watch frame injection mold provided by the present invention, the guide member is provided with a first arc-shaped conical groove on both sides, the upper mold core is provided with a second arc-shaped conical groove, and an adjusting block is slidably connected to the middle block. The two ends of the adjusting block are respectively matched with the first arc-shaped conical groove and the second arc-shaped conical groove. During the mold closing or demolding process, only one end of the adjusting block extends into the first arc-shaped conical groove or the second arc-shaped conical groove.

[0020] As a preferred embodiment of the watch frame injection mold provided by the present invention, the elastic reset structure includes a first spring disposed between the row seat and the middle block. The first spring has a coaxial first guide rod inside. One end of the first guide rod is fixedly connected to the middle block, and the other end of the first guide rod is slidably connected to the row seat. The other end of the first guide rod is provided with a cap. The row seat has a sliding hole, and the cap is disposed in the sliding hole.

[0021] In a preferred embodiment of the watch frame injection mold provided by the present invention, a second sliding guide post is installed on the upper mold assembly, and a through groove is provided on the sliding guide. The second sliding guide post passes through the middle block and is inserted into the through groove of the sliding guide. A second spring is provided between the middle block and the sliding seat.

[0022] In a preferred embodiment of the watch frame injection mold provided by the present invention, a stop bar is embedded in the sliding block, a positioning groove is provided on the needle seat, the stop bar is placed in the positioning groove and the width of the positioning groove is greater than the thickness of the stop bar, so as to ensure that the front ends of the two needle seats can retract or open, and a limiting step is provided at the front end of the sliding guide. When the sliding guide moves, the stop bar restricts the translation position of the sliding guide.

[0023] In a preferred embodiment of the watch frame injection mold provided by the present invention, the upper template is provided with a limiting seat, the limiting seat is provided with a limiting groove, and the sliding seat is provided with a positioning protrusion that slides along the limiting groove.

[0024] In a preferred embodiment of the watch frame injection mold provided by the present invention, a second sliding assembly is provided on the other two sides of the middle frame mold cavity between the upper mold core and the lower mold core. The second sliding assembly includes a sliding seat, a molding module and a third sliding guide post. The sliding seat is fixedly connected to the molding module. When the third sliding guide post is inserted into the sliding seat, it drives the sliding seat to move toward the middle frame mold cavity. A sliding component is embedded in the molding module. The sliding component is used to form holes for installing functional components on the side of the watch frame.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The watch frame injection mold provided by this invention, by setting symmetrical and retractable pin cores at the front end of the first row component, allows the buckle pin holes to be formed directly during the injection molding process, thereby avoiding secondary processing steps, reducing production steps, and enabling the pin cores to enter the cavity when the mold is closed and exit when the mold is opened, thus realizing the forming of the buckle pin hole structure, ensuring that the buckle pin holes on both sides of the watch frame are coaxial, improving the assembly accuracy of the watch strap, significantly improving production efficiency and reducing production costs. Attached Figure Description

[0027] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an existing watch frame structure;

[0029] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the watch frame injection mold provided by the present invention;

[0030] Figure 3 for Figure 2 Top view;

[0031] Figure 4 for Figure 3 Schematic diagram of the AA section;

[0032] Figure 5 This is a schematic diagram of the internal structure of the injection mold for the watch frame provided by the present invention;

[0033] Figure 6 for Figure 5Top view;

[0034] Figure 7 for Figure 6 Schematic diagram of the BB cross section;

[0035] Figure 8 This is a schematic diagram of the sliding component in the injection mold for the watch frame provided by the present invention;

[0036] Figure 9 This is a schematic diagram of the structure of the first row component and the upper mold core in the injection mold for the watch frame provided by the present invention;

[0037] Figure 10 This is a schematic diagram of the first row component structure in the injection mold of the watch frame provided by the present invention;

[0038] Figure 11 This is an exploded view of the first row component in the watch frame injection mold provided by the present invention;

[0039] Figure 12 This is a schematic diagram of the internal structure of the first row component in the injection mold of the watch frame provided by the present invention;

[0040] Figure 13 This is a schematic diagram of the connection structure between the guide component and the pin holder in the injection mold of the watch frame provided by the present invention;

[0041] Figure 14 This is a schematic diagram of the guide component structure in the injection mold for the watch frame provided by the present invention;

[0042] Figure 15 This is a schematic diagram of the needle holder structure in the injection mold of the watch frame provided by the present invention.

[0043] The markings in the diagram are explained as follows:

[0044] 100. Watch frame; 101. Groove; 102. Buckle pin hole; 103. Functional hole; 1. Upper template; 2. Upper mold core; 21. Second arc-shaped conical groove; 3. Lower template; 4. Lower mold core; 5. First sliding component; 51. Sliding slider; 5101. Arc-shaped shell; 52. Middle block; 53. Sliding seat; 531. Sliding hole; 54. First sliding guide post; 55. Pin core; 56. Pin seat; 57. Sliding guide; 571. Conical block; 572. First arc-shaped conical groove; 58. Adjusting block; 59. First spring; 510. 511. First guide rod; 512. Cap; 513. Second sliding guide post; 514. Through groove; 515. Second spring; 516. Stop bar; 517. Positioning groove; 518. Limiting step; 519. Positioning protrusion; 520. Limiting seat; 6. Upper pressure plate; 7. Top plate; 8. Injection runner structure; 9. Lower bottom plate; 10. Support column; 11. Ejection structure; 12. Second sliding assembly; 121. Sliding seat; 122. Molded module; 123. Third sliding guide post; 124. Sliding component; 13. Wedge slide rail. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0047] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] like Figure 1The diagram shows a watch frame structure. The watch frame 100 has symmetrical grooves 101 on both sides, and buckle pin holes 102 on the side walls of both ends of the grooves 101. During watch assembly, the end of the watch strap is placed in the groove 101, and the buckle pin on the strap extends into the buckle pin hole 102. The engagement between the buckle pin and the buckle pin hole 102 forms a rotating connection structure, allowing the watch strap to swing relative to the watch frame 100, thus adapting to the bending position of the wearer's wrist and improving wearing comfort. On the other two sides of the watch frame 100, there are also some functional holes 103. These functional holes 103 are typically used for… To accommodate the installation of functional components, such as side button components, microphone components, speaker components, air pressure vents, or charging contact structures, the watch frame 100 is made to meet the multi-functional structural requirements of a smartwatch. During injection molding, the forming of the pin hole 102 is a challenge, mainly because the pin hole 102 is usually a through hole structure with a small diameter. At the same time, the pin hole 102 is located on the side wall of the frame structure. This area is usually a lateral structure in the mold. If it is formed directly through a traditional core, it is easy to cause demolding interference problems. Therefore, in the existing technology, the pin hole 102 is usually formed by drilling after injection molding.

[0050] However, forming the pin hole 102 through post-processing will bring a series of problems, such as increased production process, increased processing costs, difficulty in ensuring hole position accuracy, and reduced production efficiency. Therefore, how to directly form the pin hole 102 structure during injection molding has become an important technical problem that needs to be solved in this field.

[0051] Therefore, this embodiment provides a watch frame injection mold. The mold, by setting a specially structured positioning component and a retractable pin core 55 structure, enables the pin hole 102 to be formed synchronously during the injection molding process, thereby reducing subsequent processing steps, improving production efficiency and reducing production costs, while ensuring the positional accuracy of the pin hole 102.

[0052] Please refer to Figures 2-15A watch frame injection mold is provided, comprising an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper template 1 and an upper mold core 2, and the lower mold assembly includes a lower template 3 and a lower mold core 4. When the upper mold core 2 and the lower mold core 4 are closed, a watch frame cavity is formed. The structural shape of the watch frame cavity matches the outer contour of the watch frame 100. After the mold is closed, molten plastic enters the watch frame cavity under injection pressure and cools and solidifies therein, thereby forming the watch frame 100 structure. A first sliding component 5 is provided on both symmetrical sides of the watch frame cavity between the upper mold core 2 and the lower mold core 4. The first sliding component 5 can enter the watch frame 100 laterally during the mold closing process. The 0-cavity is formed by lateral movement into the cavity to form a lateral structure. This structure is a lateral core-pulling structure, which can enter the cavity to form the structure when the mold is closed and exit the cavity when the mold is opened, thereby avoiding interference with the molded product. The front end of the first row component 5 is provided with symmetrical and retractable pin cores 55. The pin cores 55 are used to form buckle holes 102 at the strap connection part of the watch frame 100. Thus, the buckle holes 102 are formed simultaneously during the injection molding of the middle frame. This structure allows the buckle holes 102 to be formed directly during the injection molding process without the need for post-processing through drilling or CNC machining, thereby significantly improving production efficiency and reducing production costs.

[0053] like Figure 4 As shown, the upper mold assembly also includes an upper pressure plate 6, an upper plate 7, and an injection runner structure 8. The injection runner structure 8 is connected to the middle frame mold cavity. The injection runner structure 8 typically includes a main runner, branch runners, and a gate structure. Its function is to guide the molten plastic ejected from the injection molding machine nozzle into the middle frame mold cavity and ensure that the molten plastic can uniformly fill the cavity. The lower mold assembly also includes a lower base plate 9, a support column 10, and an ejector structure 11. The upper end of the ejector structure 11 extends into the middle frame mold cavity. After injection molding is completed, the ejector structure 11 ejects the watch middle frame 100. Ejection: The ejection structure 11 may include ejector plates, ejector pins, push plates, or ejector blocks. Through the action of the ejection mechanism, the formed watch frame 100 can be ejected from the mold, thereby realizing the demolding process of the product. Of course, the upper mold assembly and the lower mold assembly also include other accessories, such as guide pillars, guide sleeves, limit blocks, fastening screws, positioning pins, and wear-resistant plates. These structures are used to ensure the positioning accuracy, structural strength, and stability of the mold. This part is conventional technology for those skilled in the art, and will not be described in detail here.

[0054] Furthermore, such as Figure 8 , Figure 9As shown, the first positioning component 5 includes a positioning slider 51, an intermediate block 52, a positioning seat 53, and a first positioning guide post 54. The intermediate block 52 is connected to the positioning slider 51 and slidably connected to the upper mold core 2. The front end of the positioning slider 51 is provided with an arc-shaped shell 5101, and the needle core 55 extends from both ends of the arc-shaped shell 5101. The arc-shaped shell 5101 is used to form a groove 101 for placing the watch strap in the watch frame 100. The curvature shape of the arc-shaped shell 5101 matches the structure of the groove 101 in the watch frame 100. The arc-shaped shell 5101 can be used to form a groove 101 for placing the watch strap in the injection molding process. The strap mounting groove 101 is directly formed during the process, thereby ensuring the shape accuracy and surface quality of the groove 101 structure. The first sliding guide post 54 is inserted into the sliding seat 53 and cooperates with the first inclined surface structure. When the mold is closed, the first sliding guide post 54 is inserted into the sliding seat 53, driving the sliding seat 53 to move towards the middle frame mold cavity, thereby driving the middle block 52 and the sliding slider 51 to move towards the middle frame mold cavity, so that the arc shell 5101 and the pin core 55 enter the cavity to complete the forming process of the groove 101 structure and the pin hole 102 structure.

[0055] Furthermore, such as Figures 10-15 As shown, the sliding block 51 has a cavity inside, and symmetrically arranged needle seats 56 are arranged inside the cavity. The needle core 55 is fixed to the end of the needle seat 56 and extends from the opposite side of the two needle seats 56. By setting the symmetrical arrangement of the needle seats 56, the two needle cores 55 can be kept in a stable position, thereby ensuring the coaxiality of the pin hole 102 during the forming process and improving the processing accuracy of the pin hole 102. Specifically, a sliding guide 57 is slidably connected inside the intermediate block 52. The rear end of the sliding guide 57 is connected to the sliding seat 53. The front end of the sliding guide 57 is provided with a tapered block 571. The tapered block 571 extends between the two needle seats 56 and is slidably connected to the needle seats 56 through the wedge-shaped slide rail 13. The sliding seat 53 An elastic reset structure is provided between the intermediate block 52 and the mold. When the mold is closed, the slide seat 53 pushes the slide guide 57 to move towards the middle frame mold cavity. The conical block 571 opens the two pin seats 56, so that the pin core 55 at the end of the pin seat 56 extends out from the arc shell 5101. When the mold is disassembled, the elastic reset structure acts on the slide seat 53, so that the slide guide 57 moves away from the middle frame mold cavity. The two pin seats 56 retract, so that the pin core 55 at the end of the pin seat 56 retracts into the arc shell 5101. Through this structural design, the pin core 55 is automatically extended and automatically retracted during mold closing and disassembly, thereby forming the pin hole 102 when the mold is closed. When the mold is opened, the pin core 55 is prevented from interfering with the product, thus improving the stability of the mold.

[0056] Furthermore, such as Figure 9 , Figure 13As shown, the sliding guide 57 has a first arc-shaped conical groove 572 on both sides, and the upper mold core 2 has a second arc-shaped conical groove 21. An adjusting block 58 is slidably connected to the middle block 52. The two ends of the adjusting block 58 are respectively matched with the first arc-shaped conical groove 572 and the second arc-shaped conical groove 21. During mold closing or mold disassembly, only one end of the adjusting block 58 extends into the first arc-shaped conical groove 572 or the second arc-shaped conical groove 21. During initial mold closing, one end of the adjusting block 58 extends into the first arc-shaped conical groove 572 of the sliding guide 57. When the first sliding guide post 54 drives the middle block 52 to move through the sliding seat 53, the middle block 52 moves synchronously with the sliding guide 57. When the adjusting block 58 moves to the second arc-shaped conical groove 21, the other end of the adjusting block 58 extends into the second arc-shaped conical groove 21. At this time, one end of the adjusting block 58 disengages from the first arc-shaped conical groove 572. 2. This causes the guide post 57 to separate from the middle block 52. The first guide post 54 continues to descend, compressing the elastic reset structure. At the same time, the guide post 53 drives the guide post 57 to move towards the middle frame mold cavity. The tapered block 571 opens the two pin seats 56, so that the pin cores 55 on the two pin seats 56 extend from both ends of the arc shell 5101. When demolding, the first guide post 54 disengages from the guide post 53. The elastic reset structure drives the guide post 53 to move away from the middle frame mold cavity. The guide post 53 synchronously drives the guide post 57 to move. At this time, the two pin seats 56 contract, so that the pin cores 55 contract into the arc shell 5101 until one end of the adjusting block 58 extends into the first arc tapered groove 572. At this time, the middle block 52 and the guide post 57 are connected together and move synchronously, thereby synchronously retracting and pulling the core of the first guide post assembly 5.

[0057] Specifically, such as Figure 11 As shown, the elastic reset structure includes a first spring 59 disposed between the sliding seat 53 and the intermediate block 52. A coaxial first guide rod 510 is disposed inside the first spring 59. One end of the first guide rod 510 is fixedly connected to the intermediate block 52, and the other end of the first guide rod 510 is slidably connected to the sliding seat 53. A cap 511 is provided at the other end of the first guide rod 510. A sliding hole 531 is provided on the sliding seat 53, and the cap 511 is disposed in the sliding hole 531. When the sliding seat 53 moves, the first guide rod 510 and the cap 511 slide in the sliding hole 531, which can provide constraint while ensuring the driving of the sliding seat 53 on the intermediate block 52 and the sliding slider 51, and limit the compression and extension length of the first spring 59, so as to avoid the spring from deviating during compression or extension and improve the structural stability.

[0058] Furthermore, such as Figure 8 , Figure 9 , Figure 11As shown, a second sliding guide post 512 is installed on the upper mold assembly, and a through groove 513 is provided on the sliding guide 57. The second sliding guide post 512 passes through the intermediate block 52 and is inserted into the through groove 513 of the sliding guide 57. A second spring 514 is provided between the intermediate block 52 and the sliding seat 53. The length of the through groove 513 is greater than the width of the second sliding guide post 512. The second sliding guide post 512, the intermediate block 52, and the sliding guide 57 also adopt a second inclined surface structure for cooperation. The inclination direction of the first inclined surface structure is opposite to that of the second inclined surface structure. In this way, the fixed stability of the intermediate block 52 can be guaranteed after the mold is closed, and the sliding distance of the sliding guide 57 can also be limited.

[0059] Furthermore, such as Figure 9 , Figure 12 , Figure 13 As shown, a stop bar 515 is embedded in the sliding slider 51, and a positioning groove 516 is provided on the needle seat 56. The stop bar 515 is placed in the positioning groove 516, and the width of the positioning groove 516 is greater than the thickness of the stop bar 515, ensuring that the front ends of the two needle seats 56 can retract or open. The front end of the sliding guide 57 is provided with a limiting step 517. When the sliding guide 57 moves, the stop bar 515 restricts the translational position of the sliding guide 57, which can further limit the sliding depth of the sliding guide 57 and also ensure the position accuracy of the needle seat 56.

[0060] Furthermore, such as Figure 10 As shown, the upper template 1 is provided with a limiting seat 519, the limiting seat 519 is provided with a limiting groove 520, and the sliding seat 53 is provided with a positioning protrusion 518 that slides along the limiting groove 520. The movement trajectory of the sliding seat 53 can be restricted by the cooperation between the limiting groove 520 and the positioning protrusion 518, thereby improving the stability of the movement of the sliding assembly.

[0061] Furthermore, such as Figure 5 , Figure 8 As shown, a second positioning assembly 12 is provided on the other two sides of the middle frame mold cavity between the upper mold core 2 and the lower mold core 4. The second positioning assembly 12 includes a sliding seat 121, a mold module 122 and a third positioning guide post 123. The sliding seat 121 is fixedly connected to the mold module 122. When the third positioning guide post 123 is inserted into the sliding seat 121, it drives the sliding seat 121 to move toward the middle frame mold cavity. A positioning component 124 is embedded in the mold module 122. The positioning component 124 is used to form holes for installing functional components on the side of the watch middle frame 100. The positioning component 124 is designed independently according to the holes of the functional components formed. By setting the second positioning assembly 12, the functional hole structure on the side of the middle frame can be formed simultaneously during the injection molding process, thereby further reducing subsequent processing steps and improving production efficiency. In this embodiment, two watch middle frames 100 can be injection molded at a time, and the two core mold structures are arranged side by side.

[0062] The working principle of the injection mold for the watch frame 100 provided by this invention is as follows: The synchronous forming of the buckle hole 102 is achieved through the cooperation of the first sliding component 5 and the telescopic structure of the pin core 55. During the mold closing process, the upper mold component and the lower mold component gradually approach each other. When the mold is nearly fully closed, the first sliding guide post 54 contacts the sliding seat 53 and slides relative to each other along the inclined structure, thereby driving the sliding seat 53 to move laterally. During the movement, the sliding seat 53 drives the middle block 52 and the sliding slider 51 towards the middle frame mold. As the cavity moves, the guide 57 moves forward under the pushing action of the guide seat 53. The tapered block 571 at the front end of the guide 57 gradually enters between the two needle seats 56. Since the tapered block 571 and the needle seats 56 are connected by the wedge-shaped slide rail 13, the tapered block 571 will gradually push the two needle seats 56 apart to both sides when it moves forward. This allows the needle core 55 at the end of the needle seat 56 to extend from both ends of the arc-shaped shell 5101 and enter the cavity of the middle frame mold. When the mold is fully closed, the needle core 55 is exactly located in the cavity. The location for forming the pin hole 102 needs to be determined, thus forming the pin hole 102 structure during the injection molding process. When the mold begins to open, the first guide post 54 gradually exits the guide seat 53, and at the same time, the elastic reset structure pushes the guide seat 53 to move in the opposite direction. The guide post 57 then retracts, the cone block 571 disengages from the pin seat 56, causing the pin seat 56 to retract, and the pin core 55 retracts into the arc-shaped shell 5101. After the pin core 55 has completely exited the cavity, the ejection mechanism is activated, and the ejector pins push the molded watch frame 100 out of the cavity. The ejection process completes the entire injection molding production process. By setting symmetrical and retractable pin cores 55 at the front end of the first row component 5, the pin hole 102 can be directly formed during the injection molding process, thereby avoiding secondary processing steps, reducing production steps, and enabling the pin core 55 to enter the cavity when the mold is closed and exit when the mold is opened, thus realizing the forming of the pin hole 102 structure. This ensures that the pin holes 102 on both sides of the watch frame 100 are coaxial, improves the assembly accuracy of the watch strap, significantly improves production efficiency, and reduces production costs.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A watch frame injection mold, comprising an upper mold assembly and a lower mold assembly, the upper mold assembly comprising an upper template and an upper mold core, the lower mold assembly comprising a lower template and a lower mold core, wherein the upper mold core and the lower mold core form a frame cavity when closed, characterized in that, A first sliding assembly is located on both symmetrical sides of the middle frame mold cavity, between the upper mold core and the lower mold core. The first sliding assembly can enter the watch frame cavity laterally during mold closing. The front end of the first sliding assembly has symmetrical and retractable pins for forming buckle holes at the strap connection point of the watch frame, thus simultaneously forming the buckle holes during middle frame injection molding. The first sliding assembly includes a sliding slider, a middle block, a sliding seat, and a first sliding guide post. The middle block and the sliding slider are connected and slidably connected to the upper mold core. The front end of the sliding slider has an arc-shaped shell, from which the pins extend. The arc-shaped shell forms a groove for placing the watch strap in the watch frame. The first sliding guide post is inserted into the sliding seat and engages with it through a beveled structure. During mold closing, the first sliding guide post is inserted into the sliding seat, driving the sliding seat towards the middle frame mold cavity. The movement of the slide block and the sliding block towards the middle frame mold cavity causes the middle block and the sliding block to move towards the middle frame mold cavity. The sliding block has a cavity inside, and symmetrically arranged needle seats are provided in the cavity. The needle core is fixed to the end of the needle seat and extends from the opposite side of the two needle seats. A sliding guide is slidably connected in the middle block. The rear end of the sliding guide is connected to the sliding seat. The front end of the sliding guide has a conical block. The conical block extends between the two needle seats and is slidably connected to the needle seats through a wedge-shaped slide rail. An elastic reset structure is provided between the sliding seat and the middle block. When the mold is closed, the sliding seat pushes the sliding guide towards the middle frame mold cavity. The conical block opens the two needle seats, so that the needle core at the end of the needle seat extends out of the arc-shaped shell. When the mold is disassembled, the elastic reset structure acts on the sliding seat, so that the sliding guide moves away from the middle frame mold cavity. The two needle seats retract, so that the needle core at the end of the needle seat retracts into the arc-shaped shell.

2. The injection mold for a watch frame according to claim 1, characterized in that, The guide member has a first arc-shaped conical groove on both sides, the upper mold core has a second arc-shaped conical groove, and an adjustment block is slidably connected to the middle block. The two ends of the adjustment block are respectively matched with the first arc-shaped conical groove and the second arc-shaped conical groove. During the mold closing or demolding process, only one end of the adjustment block extends into the first arc-shaped conical groove or the second arc-shaped conical groove.

3. The injection mold for a watch frame according to claim 1, characterized in that, The elastic reset structure includes a first spring disposed between the row seat and the intermediate block. The first spring has a coaxial first guide rod inside. One end of the first guide rod is fixedly connected to the intermediate block, and the other end of the first guide rod is slidably connected to the row seat. The other end of the first guide rod is provided with a cap. The row seat has a sliding hole, and the cap is disposed in the sliding hole.

4. The injection mold for a watch frame according to claim 1, characterized in that, The upper mold assembly is equipped with a second sliding guide post, and the sliding guide post is provided with a through groove. The second sliding guide post passes through the middle block and is inserted into the through groove of the sliding guide post. A second spring is provided between the middle block and the sliding seat.

5. The injection mold for a watch frame according to claim 1, characterized in that, The sliding slider has a stop bar embedded in it, and the needle holder has a positioning groove. The stop bar is placed in the positioning groove and the width of the positioning groove is greater than the thickness of the stop bar, so as to ensure that the front ends of the two needle holders can retract or open. The front end of the sliding guide has a limiting step. When the sliding guide moves, the stop bar restricts the translation position of the sliding guide.

6. The injection mold for a watch frame according to claim 1, characterized in that, The upper template is provided with a limiting seat, the limiting seat is provided with a limiting groove, and the sliding seat is provided with a positioning protrusion that slides along the limiting groove.

7. The injection mold for a watch frame according to claim 1, characterized in that, A second positioning assembly is provided on the other two sides of the middle frame cavity between the upper mold core and the lower mold core. The second positioning assembly includes a sliding seat, a molding module and a third positioning guide post. The sliding seat is fixedly connected to the molding module. When the third positioning guide post is inserted into the sliding seat, it drives the sliding seat to move toward the middle frame cavity. A positioning component is embedded in the molding module. The positioning component is used to form holes for installing functional components on the side of the watch middle frame.

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