High-precision watch case integrated injection molding device

Abstract

The application discloses a high-precision watch shell integrated injection molding device, which comprises an upper mold, a lower mold and an inner plate. The opposite surfaces of the upper mold and the lower mold are provided with mold grooves. The bottom surface of the mold groove of the lower mold is provided with a thickened part which is used for opening a window on the top surface of the watch shell. The thickened part and the mold groove form a frame groove which is used for fixing the display glass above the watch shell. The inner plate is arranged between the upper mold and the lower mold, and the inner plate, the upper mold and the lower mold form a mold cavity. The mold cavity and the frame groove are combined to form a watch shell cavity. The application has the advantages of simple structure, one-time injection molding of the watch shell with a display glass mounting port and a button port, no need of subsequent processing, independent arrangement of the inner plate, shrinkage and removal of the inner plate, replacement of different side plates according to the watch style to change the position of the button port, and adaptability of the inner plate to different upper molds and lower molds.

Description

Technical Field

[0001] This invention relates to the field of watch manufacturing technology, specifically to a high-precision one-piece injection molding device for watch cases. Background Technology

[0002] A watch case injection mold is a tool used to produce watch cases, and it is also a tool that gives the watch case a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of watch cases. Molten plastic is injected into the mold cavity under high pressure by an injection molding machine, and after cooling and solidification, the molded product is obtained.

[0003] However, existing watch case injection molds have certain shortcomings that need to be improved. First, existing watch case injection molds do not have the function of grooving. It is necessary to groove the watch case again at the glass mounting position and the button position, which cannot be completed in one go, thus affecting production efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-precision one-piece injection molding device for watch cases, which can directly and integrally mold watch cases with windows and button openings, thereby solving the problems mentioned in the background art.

[0005] The present invention is achieved through the following technical solution: a high-precision watch case integrated injection molding device, comprising an upper mold, a lower mold and an inner plate, wherein mold grooves are formed on the opposite surfaces of the upper mold and the lower mold, and a thickened part is formed on the bottom surface of the mold groove of the lower mold for opening a window on the top surface of the watch case. A frame groove for fixing the display glass on the top of the watch case is formed between the thickened part and the mold groove. The inner plate is disposed between the upper mold and the lower mold, and a mold cavity is formed between the inner plate and the upper mold and the lower mold. The mold cavity and the frame groove are combined to form the watch case cavity.

[0006] As a preferred technical solution, the inner plate includes a shell, a cover plate and multiple side plates. The shell has an internal mounting groove, and the two sides of the mounting groove are provided with mounting openings that communicate with the outside. The side plates are respectively set in the mounting openings, and the outer surfaces of the side plates protrude to form key parts. The outer surfaces of the key parts abut against the inner surfaces of the lower mold and the upper mold. The cover plate is installed on the top surface of the shell and covers and seals the top surfaces of the mounting groove and the mounting openings.

[0007] As a preferred technical solution, a dual-axis cylinder is horizontally installed in the middle of the mounting slot. A connecting plate is installed on the piston rods at both ends of the dual-axis cylinder. A connecting groove is provided on the inner side of the side plate. The connecting plate is inserted into the connecting groove. A single-axis cylinder is installed in front of and behind the dual-axis cylinder in the mounting slot. A panel is installed on the piston rod of the single-axis cylinder. The panel is installed on the inner side of the mounting slot in the width direction.

[0008] As a preferred technical solution, a battery and a main control board are installed inside the mounting slot. The battery, the main control board, the dual-axis cylinder and the single-axis cylinder are electrically connected. The main control board is equipped with a wireless communication module, which receives external control signals. The control signals are processed by the main control board and used to synchronously control the dual-axis cylinder and the single-axis cylinder.

[0009] As a preferred technical solution, connecting posts are installed at the four corners inside the mounting slot. Each connecting post has a screw hole on its top surface. The top surface of the cover plate has a groove corresponding to the screw hole. Each groove has a through hole on its bottom surface, and a screw is installed in each through hole. The lower end of the screw is threaded into the screw hole, and the tail of the screw is located inside the groove. A sealing cap is threaded into the opening of the groove to seal the screw in the groove. The top surface of the sealing cap is flush with the top surface of the housing. The connecting posts are all located on the inner side of the side plate, and a gap is formed between them to allow the side plate to move inward.

[0010] As a preferred technical solution, a positioning port is provided at the center of the top surface of the lower mold, and a positioning post is installed on the bottom surface of the inner plate directly opposite the positioning port. The lower end of the positioning post extends through the positioning port to the outside. An insertion hole is provided on the end of the positioning post located on the outside. A telescopic cylinder is horizontally installed on the bottom surface of the lower mold directly opposite the insertion hole, and the piston rod of the telescopic cylinder is inserted into the insertion hole.

[0011] As a preferred technical solution, a rectangular groove is provided on the top surface of the upper mold, and an electromagnet is installed in the rectangular groove.

[0012] As a preferred technical solution, an "L"-shaped base is also installed on the bottom surface of the lower mold.

[0013] As a preferred technical solution, the shell and cover are made of high-temperature resistant rubber material.

[0014] As a preferred technical solution, both ends of the mounting port protrude to form positioning parts, and both ends of the side plate are provided with positioning grooves opposite to the positioning parts. The positioning parts are inserted into the positioning grooves, and the positioning parts, side plates and the sides of the housing are flush.

[0015] The beneficial effects of this invention are: the invention has a simple structure, and the inner plate and the frame groove can be combined between the upper mold and the lower mold to form the watch case cavity, so that the watch case with the display glass mounting port and the button port can be injection molded in one step without the need for subsequent processing. Moreover, the inner plate is set independently, and the inner plate can be reduced and removed. Different side plates can be replaced according to the style of the watch to change the position of the button port. Furthermore, the inner plate can be adapted to different upper molds and lower molds, thereby forming different styles of watch cases, which greatly increases the adaptability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a bottom view of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention after the upper mold has been disassembled;

[0020] Figure 4 This is a schematic diagram of the structure of the present invention after the cover plate is removed;

[0021] Figure 5 This is a schematic diagram of the structure of the present invention after the inner panel has been disassembled;

[0022] Figure 6 This is a schematic diagram of the inner plate structure in this invention;

[0023] Figure 7 This is a longitudinal cross-sectional view of the present invention.

[0024] The components are as follows: 1. Upper mold; 2. Lower mold; 3. Rectangular groove; 4. Electromagnet; 5. Positioning hole; 6. Positioning post; 7. Insertion hole; 8. Telescopic cylinder; 9. Base; 11. Housing; 12. Cover plate; 13. Sealing cover; 14. Positioning part; 15. Side plate; 16. Key part; 17. Mold cavity; 18. Connecting plate; 19. Mounting groove; 21. Dual-axis cylinder; 22. Main control board; 23. Battery; 24. Connecting post; 25. Frame groove; 26. Thickened part; 27. Single-axis cylinder; 28. Panel. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0027] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a high-precision integrated injection molding device for a watch case according to the present invention includes an upper mold 1, a lower mold 2, and an inner plate. Mold grooves are formed on the opposing surfaces of the upper mold 1 and the lower mold 2. A thickened portion 26 for opening a window on the top surface of the watch case is formed on the bottom surface of the mold groove of the lower mold 2. A frame groove 25 for fixing the display glass on the top of the watch case is formed between the thickened portion 26 and the mold groove. The inner plate is disposed between the upper mold 1 and the lower mold 2. A mold cavity 17 is formed between the inner plate and the upper mold 1 and the lower mold 2. The mold cavity 17 and the frame groove 25 are combined to form the watch case cavity.

[0029] In this embodiment, the inner plate includes a housing 11, a cover plate 12, and multiple side plates 15. The housing 11 has an internal mounting groove 19. The mounting groove 19 has mounting openings on both sides that communicate with the outside. The side plates 15 are respectively disposed in the mounting openings. The outer surfaces of the side plates 15 all protrude to form key positions 16. The outer surfaces of the key positions 16 abut against the inner surfaces of the lower mold 2 and the upper mold 1. The cover plate 12 is installed on the top surface of the housing 11 and covers and seals the top surfaces of the mounting groove 19 and the mounting openings. Since the side plates can be replaced, after replacement, the watch case can form key openings of different sizes and positions.

[0030] In this embodiment, a dual-axis cylinder 21 is horizontally installed in the middle of the mounting groove 19. A connecting plate 18 is installed on the piston rods at both ends of the dual-axis cylinder 21. A connecting groove is provided on the inner side of the side plate 15. The connecting plate 18 is inserted into the connecting groove. A single-axis cylinder 27 is installed in front of and behind the dual-axis cylinder 21 in the mounting groove 19. A panel 28 is installed on the piston rod of the single-axis cylinder 27. The panel 28 is installed on the inner side of the mounting groove 19 in the width direction.

[0031] In this embodiment, a battery 23 and a main control board 22 are installed inside the mounting slot 19. The battery 23, the main control board 22, the dual-axis cylinder 21, and the single-axis cylinder 27 are electrically connected. The main control board 22 is equipped with a wireless communication module, which receives external control signals. The control signals are processed by the main control board 22 and synchronously control the dual-axis cylinder 21 and the single-axis cylinder 27. The wireless communication module can be connected to external control devices, such as a control panel or controller. Through the controller, the piston rods of the dual-axis cylinder and the single-axis cylinder can be synchronously retracted inward or extended outward.

[0032] In this embodiment, connecting posts 24 are installed at the four corners inside the mounting groove 19. Each connecting post 24 has a screw hole on its top surface. Each cover plate 12 has a groove on its top surface opposite the screw hole. Each groove has a through hole on its bottom surface. Each through hole has a screw. The lower end of each screw is threaded into the screw hole. The tail of each screw is located inside the groove. A sealing cap 13 is threaded into the opening of the groove to seal the screw in the groove. The top surface of the sealing cap 13 is flush with the top surface of the housing 11. Each connecting post 24 is located inside the side plate 15 and forms a gap between the connecting post 24 and the side plate 15 to allow the side plate 15 to move inward.

[0033] In this embodiment, a positioning port is provided at the center of the top surface of the lower mold 2, and a positioning post 6 is installed on the bottom surface of the inner plate opposite to the positioning port. The lower end of the positioning post extends through the positioning port to the outside. An insertion hole 7 is provided on the end of the positioning post 6 located on the outside. A telescopic cylinder 8 is horizontally installed on the bottom surface of the lower mold 2 opposite to the insertion hole 7. The piston rod of the telescopic cylinder 8 is inserted into the insertion hole 7.

[0034] In order to facilitate demolding, a rectangular groove 3 is provided on the top surface of the upper mold 1, and an electromagnet 4 is installed in the rectangular groove 3.

[0035] To ensure that the lower mold can be firmly fixed on the worktable, an "L"-shaped base 9 is also installed on the bottom surface of the lower mold 2. Bolts can pass through the fixing holes on the base to lock and fix the lower mold on the worktable.

[0036] Considering the need to remove the inner plate from the watch case later, the case 11 and cover plate 12 are made of high-temperature resistant rubber material, allowing the case and cover plate to bend and deform. Multiple reinforcing rods are installed inside the case and cover plate, which are distributed horizontally and vertically. The length of the vertical reinforcing rod is less than the length of the inner plate, and the length of the horizontal reinforcing rod is less than the width of the inner plate, so as not to affect the inward compression of the inner plate. Furthermore, the reinforcing rods are made of metal material, so that the reinforcing rods can be attracted by electromagnets.

[0037] To prevent the side plate from moving outward, both ends of the mounting opening protrude to form positioning parts 14. Both ends of the side plate 15 are provided with positioning grooves opposite to the positioning parts 14. The positioning parts 14 are inserted into the positioning grooves. The positioning parts 14, the side plate 15 and the side of the housing 11 are flush. The positioning parts and positioning grooves can limit the side plate and prevent it from protruding outward.

[0038] The upper mold has an injection hole on its top surface that communicates with the watch case cavity. Molten plastic can be injected into the watch case cavity through the injection hole, so that the watch can be formed in the watch case cavity in one go. A frame for installing the display glass is formed in the frame groove. Since there are key parts on both sides of the watch case cavity, two button openings can be directly formed on both sides of the watch case during the injection process.

[0039] During demolding, an electric cylinder lifts the upper mold, which in turn activates an electromagnet to attract the inner plate. This upward movement of the upper mold synchronously moves the watch case and the inner plate. After reaching a certain height, a dual-axis cylinder and a single-axis cylinder retract their piston rods. The retraction of the piston rod on the dual-axis cylinder moves the connecting plate and the side plate, which in turn moves the key mechanism, allowing it to move out of the button opening on the watch case. As the side plate continues to move inward, it presses the connecting column inward, which in turn compresses the inner plate laterally. Meanwhile, the retraction of the piston rod on the single-axis cylinder moves the front panel, which inward compresses the inner plate longitudinally. This makes the length and width of the inner plate smaller than the opening on the watch case, allowing the inner plate to move directly downward through the opening on the watch case, thus completing the demolding process of the watch case.

[0040] Before the inner panel moves upward, the telescopic cylinder can be activated, causing the piston rod on the telescopic cylinder to move out of the insertion hole. After losing the positioning of the piston rod, the inner panel can rise smoothly, and during the rise, it drives the positioning column, causing the positioning column to move along the positioning port. The positioning column can ensure the stability and positioning effect of the inner panel when it moves, and avoid the rotation and swaying of the inner panel.

[0041] The inner plate can be independently removed from the upper and lower molds and changed according to the position of the button opening on the watch case. When changing, the sealing cover can be removed and the internal screws can be unscrewed. After the screws are removed, the cover plate can be removed. At this time, the connecting plate can be removed upward along the mounting port and the button part with different sizes or positions can be installed. The side plate is reinstalled into the mounting port and can be connected to the connecting plate again, so that different types of cases can be injection molded in the same watch case cavity.

[0042] Furthermore, since the inner plate can be disassembled, it can be used to change the shape of the watch case without altering the internal cavity of the watch case. As long as the inner plate is installed in different upper and lower molds, a watch case of a certain style can be injection molded, greatly increasing its adaptability.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A high-precision integrated injection molding device for watch cases, characterized in that: The watch includes an upper mold (1), a lower mold (2), and an inner plate. Mold grooves are formed on the opposite surfaces of the upper mold (1) and the lower mold (2). A thickened part (26) for opening a window on the top surface of the watch case is formed on the bottom surface of the mold groove of the lower mold (2). A frame groove (25) for fixing the display glass on the top of the watch case is formed between the thickened part (26) and the mold groove. The inner plate is disposed between the upper mold (1) and the lower mold (2). A mold cavity (17) is formed between the inner plate and the upper mold (1) and the lower mold (2). The mold cavity (17) and the frame groove (25) are combined to form the watch case cavity. The inner plate includes a shell (11), a cover plate (12) and multiple side plates (15). The interior of the shell (11) forms a mounting groove (19). The mounting groove (19) has mounting openings on both sides that communicate with the outside. The side plates (15) are respectively set in the mounting openings. The outer surfaces of the side plates (15) all protrude to form key parts (16). The outer surfaces of the key parts (16) abut against the inner surfaces of the lower mold (2) and the upper mold (1). The cover plate (12) is installed on the top surface of the shell (11) and covers and seals the top surfaces of the mounting groove (19) and the mounting openings. A dual-shaft cylinder (21) is horizontally installed in the middle of the mounting slot (19). A connecting plate (18) is installed on the piston rods at both ends of the dual-shaft cylinder (21). A connecting groove is provided on the inner side of the side plate (15). The connecting plate (18) is inserted into the connecting groove. A single-shaft cylinder (27) is installed in front of and behind the dual-shaft cylinder (21) in the mounting slot (19). A panel (28) is installed on the piston rod of the single-shaft cylinder (27). The panel (28) is installed on the inner side of the mounting slot (19) in the width direction. The battery (23) and main control board (22) are installed inside the mounting slot (19). The battery (23), main control board (22), dual-axis cylinder (21) and single-axis cylinder (27) are electrically connected. The main control board (22) is equipped with a wireless communication module. The control signal is received from the outside through the wireless communication module. The control signal is processed by the main control board (22) and the dual-axis cylinder (21) and single-axis cylinder (27) are synchronously controlled. Connecting posts (24) are installed at the four corners inside the mounting slot (19). Each connecting post (24) has a screw hole on its top surface. Each cover plate (12) has a groove on its top surface opposite the screw hole. Each groove has a through hole on its bottom surface. Each through hole has a screw. The lower end of each bolt is threaded into the screw hole. The tail of each screw is located inside the groove. A sealing cap (13) is threaded into the opening of the groove to seal the screw in the groove. The top surface of the sealing cap (13) is flush with the top surface of the housing (11). Each connecting post (24) is located inside the side plate (15) and forms a gap between it and the side plate (15) for the side plate (15) to move inward. A positioning port is provided at the center of the top surface of the lower mold (2). A positioning post (6) is installed on the bottom surface of the inner plate directly opposite the positioning port. The lower end of the positioning post extends through the positioning port to the outside. An insertion hole (7) is provided on the end of the positioning post (6) located on the outside. A telescopic cylinder (8) is installed horizontally on the bottom surface of the lower mold (2) directly opposite the insertion hole (7). The piston rod of the telescopic cylinder (8) is inserted into the insertion hole (7). A rectangular groove (3) is provided on the top surface of the upper mold (1), and an electromagnet (4) is installed in the rectangular groove (3).

2. The high-precision integrated injection molding device for watch cases according to claim 1, characterized in that: An "L"-shaped base (9) is also installed on the bottom surface of the lower mold (2).

3. The high-precision watch case integrated injection molding device according to claim 1, characterized in that: The shell (11) and cover plate (12) are made of high-temperature resistant rubber material.

4. The high-precision integrated injection molding device for watch cases according to claim 1, characterized in that: Both ends of the mounting port protrude to form positioning parts (14), and both ends of the side plate (15) are provided with positioning grooves opposite to the positioning parts (14). The positioning parts (14) are inserted into the positioning grooves. The sides of the positioning parts (14), the side plate (15) and the housing (11) are flush.

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