Injection mold of watch case
By using an independent sliding structure and guide column design, the problem of interference between the button hole and lug hole in the injection mold of watch case was solved, achieving high-precision and high-efficiency mold operation, improving product quality and reducing production costs.
Patent Information
- Application Number
- CN202520601774.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Traditional watch case injection molds are prone to interference when molding button holes and lug holes, resulting in uneven mold operation, reduced product qualification rate and increased production costs.
Independent sliding structures are used to form the key holes and lug holes respectively. Guide pillars and T-slots are used to ensure that each sliding structure moves independently to avoid interference, and elastic elements are used to reduce wear.
It improved the precision and integrity of the holes in the watch case, increased the product qualification rate, and reduced mold damage and production costs.
Smart Images
Figure CN223918545U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, specifically to an injection mold for a watch case. Background Technology
[0002] In the watchmaking industry, the watch case, as a crucial component, directly impacts the overall quality of the watch. Currently, injection molding is a commonly used process in watch case production.
[0003] In the injection molding production of watch cases, such as Figure 1 As shown, the molding of the button holes and lug holes is a key step, as these hole structures usually require core pulling, such as corresponding sliding structures, to complete the injection molding.
[0004] Traditional sliding door structures are prone to interference issues when dealing with situations where the button holes are located in the center of a watch case, with lug holes on both sides. For example, during the core-pulling process, the structure responsible for forming the button holes and the corresponding sliding door structure may obstruct each other, causing the mold to move unevenly. This, in turn, affects the accuracy and integrity of the holes on the watch case, reducing the product yield. Moreover, if multiple sliding door structures are poorly designed, they can increase the complexity of the mold, reduce production efficiency, and increase production costs.
[0005] Therefore, it is necessary to propose an improved technical solution to address the above problems. Utility Model Content
[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.
[0007] An injection mold for a watch case includes an upper mold and a lower mold. The upper mold has an upper mold core, and the lower mold has a lower mold core. The upper mold and the lower mold are mated together so that the upper mold core and the lower mold core are mated together to form a mold cavity for molding the product. A first positioning structure, a second positioning structure, and a third positioning structure are provided between the upper mold and the lower mold.
[0008] The first sliding structure includes a first guide post fixed to the upper mold and a first sliding seat slidable to the upper mold. The first sliding seat is connected to a first insert at one end facing the mold cavity. The first insert is provided with a first product contour part that engages with the mold cavity.
[0009] The second sliding structure includes a second guide post fixed to the upper mold and a second sliding seat that can slide to the lower mold. A second insert is connected to one end of the second sliding seat facing the mold cavity. A second product contour part that abuts against the mold cavity is provided on the second insert.
[0010] The third row structure includes a third guide post fixed to the upper mold and a third row seat that can slide on the lower mold. The end of the third row seat facing the mold cavity is connected to a third insert, and the third insert is provided with a third product contour part that mates with the mold cavity.
[0011] As a further embodiment of this utility model: the upper mold is provided with a first T-shaped groove that slides into the first row seat, and the lower mold is provided with a second T-shaped groove that slides into the second row seat and a third T-shaped groove that slides into the third row seat.
[0012] The lower mold has a central protrusion that corresponds to the fit between the upper and lower molds. The first T-slot corresponds to the central protrusion in the vertical direction. The second and third T-slots are located on both sides of the central protrusion and correspond to it in the horizontal direction.
[0013] As a further embodiment of this utility model: the middle protrusion is inverted T-shaped, having a horizontal part and a connected vertical part. The horizontal part is used for sliding support on the first row seat, and the vertical part cooperates with the second T-shaped groove and the third T-shaped groove on both sides respectively, providing guidance and limiting for the sliding of the second row seat and the third row seat.
[0014] As a further embodiment of this utility model: the first T-shaped groove is provided with a first limiting post that acts as a limiting force on the first row seat;
[0015] The second T-slot is provided with a second limiting post that acts as a limiter on the second row seat;
[0016] The third T-shaped groove is provided with a third limiting post that acts as a limiter on the third row seat.
[0017] As a further embodiment of the present invention: the end of the first row seat away from the mold cavity is provided with a first limiting groove that cooperates with the first limiting post;
[0018] The second row seat has a second limiting groove that matches the second limiting post at the end furthest from the mold cavity;
[0019] The third row seat is provided with a third limiting groove at the end away from the mold cavity, which is matched with the third limiting post.
[0020] As a further embodiment of this utility model: a first groove is provided at one end of the first row seat facing the mold cavity, and a first elastic element is provided in the first groove. The end of the first elastic element away from the first row seat elastically abuts against the side wall of the upper mold core or the inner groove corresponding to the upper mold core.
[0021] As a further embodiment of this utility model: a second groove is provided at one end of the second row seat and the third row seat facing the mold cavity, and a second elastic member is provided in the second groove. The end of the second elastic member away from the second row seat or the third row seat elastically abuts against the side wall of the lower mold core or the inner groove corresponding to the lower mold core.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0023] The molding tasks for the button holes and lug holes on the watch case are assigned to independent sliding structures. The first sliding structure focuses on molding the button holes, while the second and third sliding structures are responsible for molding the lug holes on both sides. Each sliding structure moves independently under the guidance of its corresponding guide post, and there is no mutual interference during the core pulling process. This ensures the smooth operation of the mold during mold opening and closing and core pulling, avoids mold damage and product defects caused by interference, greatly improves the accuracy and integrity of the holes on the watch case, and significantly improves the product qualification rate.
[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the watch case structure;
[0027] Figure 2 This is a schematic diagram of the structure of this utility model;
[0028] Figure 3 This is a cross-sectional structural diagram of the first row structure of this utility model from one perspective;
[0029] Figure 4 This is a cross-sectional structural diagram of the first row structure of this utility model from another perspective;
[0030] Figure 5 This is a cross-sectional structural diagram of the present invention from one perspective corresponding to the second row structure / third row structure;
[0031] Figure 6This is a cross-sectional structural diagram of the present invention from another perspective corresponding to the second row structure / third row structure;
[0032] The reference numerals and names in the figure are as follows:
[0033] 1. Upper mold; 2. Lower mold; 3. Upper mold core; 4. Lower mold core; 5. First guide post; 6. First slide seat; 7. First insert; 8. First product contouring part; 9. Second guide post; 10. Second slide seat; 11. Second insert; 12. Second product contouring part; 13. Third guide post; 14. Third slide seat; 15. Third insert; 16. Third product contouring part; 17. First T-slot; 18. Second T-slot; 19. Third T-slot; 20. Middle protrusion; 21. Horizontal part; 22. Vertical part; 23. First limiting post; 24. Second limiting post; 25. Third limiting post; 26. First groove; 27. First elastic element; 28. Second groove; 29. Second elastic element; 30. Button hole; 31. Lug hole. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0035] Please see Figure 1-6 In this embodiment of the present invention, an injection mold for a watch case includes an upper mold 1 and a lower mold 2. The upper mold 1 has an upper mold core 3, and the lower mold 2 has a lower mold core 4. The upper mold 1 and the lower mold 2 are mated together so that the upper mold core 3 and the lower mold core 4 are mated together to form a mold cavity for molding the product. A first positioning structure, a second positioning structure, and a third positioning structure are provided between the upper mold 1 and the lower mold 2.
[0036] The first sliding structure includes a first guide post 5 fixed to the upper mold 1 and a first sliding seat 6 slidable to the upper mold 1. The first sliding seat 6 is connected to a first insert 7 at one end facing the mold cavity. The first insert 7 is provided with a first product contour part 8 that abuts against the mold cavity.
[0037] The second sliding structure includes a second guide post 9 fixed to the upper mold 1 and a second sliding seat 10 slidable to the lower mold 2. The end of the second sliding seat 10 facing the mold cavity is connected to a second insert 11, and the second insert 11 is provided with a second product contour part 12 that abuts against the mold cavity.
[0038] The third row structure includes a third guide post 13 fixed to the upper mold 1 and a third row seat 14 slidable to the lower mold 2. The third row seat 14 is connected to a third insert 15 at one end facing the mold cavity. The third insert 15 is provided with a third product contour part 16 that is connected to the mold cavity.
[0039] In the technical solution of this utility model:
[0040] The first row structure is mainly responsible for forming the button hole 30 of the watch case. The first guide post 5, which is fixed to the upper mold 1, provides precise guidance for the first row seat 6, which can slide on the upper mold 1. The first insert 7 is connected to the end of the first row seat 6 facing the mold cavity. The first product contour part 8 is provided on it and docks with the mold cavity. The shape of the first product contour part 8 is precisely matched with the shape of the button hole 30. After injection molding, the first row seat 6 slides with the first guide post 5, which drives the first insert 7 to be pulled out from the formed button hole 30 position, thereby completing the forming operation of the button hole 30.
[0041] The second and third row structures are responsible for forming the lug holes 31 on both sides of the watch case. Taking the second row structure as an example, the second guide post 9 fixed to the upper mold 1 guides the second row seat 10 that can slide on the lower mold 2. The second insert 11 is connected to the end of the second row seat 10 facing the mold cavity. Its second product contour part 12 is connected to the mold cavity and its shape is consistent with the lug hole 31. After injection molding, the second row seat 10 slides under the action of the second guide post 9, so that the second insert 11 is pulled out from the lug hole 31. Similarly, the third row structure completes the forming of the lug hole 31 on the other side in the same way. The third guide post 13 is fixed to the upper mold 1 and guides the third row seat 14 that can slide on the lower mold 2, driving the third insert 15 to complete the core pulling action.
[0042] The forming tasks of the button hole 30 and the lug hole 31 on the watch case are assigned to independent sliding structures. The first sliding structure focuses on forming the button hole 30, while the second and third sliding structures are responsible for forming the lug holes 31 on both sides. Each sliding structure moves independently under the guidance of its corresponding guide post, and there will be no mutual interference during the core pulling process. This ensures the smooth operation of the mold during mold opening and closing and core pulling, avoids mold damage and product defects caused by interference, greatly improves the accuracy and integrity of the holes on the watch case, and significantly improves the product qualification rate.
[0043] In this embodiment of the utility model, the upper mold 1 is provided with a first T-groove 17 that slides into the first row seat 6, and the lower mold 2 is provided with a second T-groove 18 that slides into the second row seat 10 and a third T-groove 19 that slides into the third row seat 14.
[0044] The lower mold 2 is provided with a middle protrusion 20 corresponding to the fit between the upper mold 1 and the lower mold 2. The first T-slot 17 corresponds to the middle protrusion 20 in the vertical direction. The second T-slot 18 and the third T-slot 19 are respectively arranged on both sides of the middle protrusion 20 and correspond to the middle protrusion 20 in the horizontal direction.
[0045] The upper mold 1 has a first T-slot 17 that slides with the first slide seat 6, and the lower mold 2 has a second T-slot 18 that slides with the second slide seat 10 and a third T-slot 19 that slides with the third slide seat 14. The T-slot design provides stable and precise guidance for the sliding of the slide seats. Compared with ordinary straight slides, the T-slot structure can better withstand lateral forces and prevent the slide seats from shifting or shaking during sliding. When the first slide seat 6 slides in the first T-slot 17, it can ensure that the first insert 7 and the first product contour part 8 on it accurately enter and exit the mold cavity, realizing the precise forming of the button hole 30. Similarly, the second slide seat 10 slides in the second T-slot 18 and the third slide seat 14 slides in the third T-slot 19, ensuring the accuracy of the forming of the lug hole 31.
[0046] The middle protrusion 20 on the lower mold 2, corresponding to the mating point of the upper mold 1 and the lower mold 2, is closely related to the layout of the T-slot. Since the button hole 30 of the watch case is located in the middle and the lug holes 31 are distributed on both sides, the design of the middle protrusion 20 is based on this hole layout. The first T-slot 17 corresponds to the middle protrusion 20 in the vertical direction. This layout is to match the position of the button hole 30. When the first slide seat 6 slides in the first T-slot 17, the first insert 7 and the first product contour part 8 on it can accurately align with the forming position of the button hole 30 in the mold cavity. At the same time, the middle protrusion 20 can play a certain role in limiting and guiding the movement of the first slide structure, so that its movement path always maintains a reasonable positional relationship with the mold cavity and surrounding parts, avoiding collisions with other parts during the movement.
[0047] The second T-slot 18 and the third T-slot 19 are respectively located on both sides of the central protrusion 20 and correspond to the central protrusion 20 in the horizontal direction. This layout matches the position of the lug holes 31 on both sides of the watch case. When the second row seat 10 and the third row seat 14 slide in the second T-slot 18 and the third T-slot 19 respectively, the second product contour part 12 and the third product contour part 16 on the second insert 11 and the third insert 15 can accurately align with the forming position of the lug holes 31 on both sides of the mold cavity. During the forming operation of the lug holes 31, the central protrusion 20 acts like a "wall", effectively dividing the movement area of the second row structure and the third row structure. When the second row structure and the third row structure are performing the core pulling action, they will move along the horizontal direction on both sides of the central protrusion 20. The central protrusion 20 restricts their range of movement, preventing them from excessively shifting to the center, thereby avoiding collisions or interference between the second row structure and the third row structure and between them and other structures of the mold.
[0048] In this embodiment of the present invention, the middle protrusion 20 is in the shape of an inverted T, having a horizontal part 21 and a connected vertical part 22. The horizontal part 21 is used to slide and support the first row seat 6, and the vertical part 22 cooperates with the second T-shaped groove 18 and the third T-shaped groove 19 on both sides respectively to provide guidance and limit for the sliding of the second row seat 10 and the third row seat 14.
[0049] The central protrusion 20 is inverted T-shaped. This design cleverly creates a height difference in the mold structure. The first row seat 6 is distinguished from the second row seat 10 and the third row seat 14 by the inverted T-shaped central protrusion 20. The first row seat 6 is located above the horizontal part 21, while the second row seat 10 and the third row seat 14 are located at lower positions on both sides of the vertical part 22. This height difference effectively avoids mutual interference between the components during movement. When the mold is running, the first row seat 6, which is responsible for forming the button hole 30, and the second row seat 10 and the third row seat 14, which are responsible for forming the lug hole 31, are separated by the vertical part 22 due to their different heights. They move in an independent spatial plane, which greatly reduces the risk of collision and ensures the orderly progress of the forming operation.
[0050] Meanwhile, the horizontal part 21 provides a stable support surface for the first row seat 6. When the first row seat 6 drives the first insert 7 to form the button hole 30 and perform subsequent core pulling actions, the horizontal part 21 can withstand the weight of the first row seat 6 and some of the pressure generated during the movement, ensuring the stability of the first row seat 6 during the sliding process and further improving the accuracy of the button hole 30 forming.
[0051] In this embodiment of the present invention, a first limiting post 23 that limits the first row seat 6 is provided inside the first T-shaped groove 17;
[0052] The second T-slot 18 has a protruding second limiting post 24 that acts as a limiting force on the second row seat 10;
[0053] The third T-groove 19 is provided with a third limiting post 25 that limits the movement of the third row seat 14;
[0054] The first row seat 6 is provided with a first limiting groove that cooperates with the first limiting post 23 at the end away from the mold cavity;
[0055] The second row seat 10 is provided with a second limiting groove that matches the second limiting post 24 at the end away from the mold cavity;
[0056] The third row seat 14 is provided with a third limiting groove that cooperates with the third limiting post 25 at the end away from the mold cavity.
[0057] The first limiting post 23 in the first T-slot 17 cooperates with the first limiting groove on the first row seat 6. When the first row seat 6 slides, the limiting post touches the wall of the limiting groove, restricting its continued sliding and ensuring movement within the preset stroke. Similarly, the limiting posts in the second T-slot 18 and the third T-slot cooperate with the corresponding row seat limiting grooves to precisely control the stroke and ensure that the row seat moves consistently and accurately each time.
[0058] In this embodiment of the present invention, a first groove 26 is provided at one end of the first row seat 6 facing the mold cavity, and a first elastic member 27 is provided in the first groove 26. The end of the first elastic member 27 away from the first row seat 6 elastically abuts against the side wall of the upper mold core 3 or the inner groove correspondingly opened in the upper mold core 3.
[0059] The second row seat 10 and the third row seat 14 are each provided with a second groove 28 at one end facing the mold cavity. A second elastic element 29 is provided in the second groove 28. The end of the second elastic element 29 away from the second row seat 10 or the third row seat 14 elastically abuts against the side wall of the lower mold core 4 or the inner groove corresponding to the lower mold core 4.
[0060] The buffering effect of elastic elements (such as springs) reduces rigid impact and wear between the slide seat and the mold core. During the injection molding process, due to the presence of elastic elements, the slide seat will not directly collide with the mold core when subjected to injection pressure, but will be buffered by the elastic elements. This not only protects the surfaces of the slide seat and the mold core, reducing wear and fatigue damage, but also extends the overall service life of the mold and reduces the maintenance cost and replacement frequency of the mold. At the same time, the setting of elastic elements allows the first slide seat 6, the second slide seat 10 and the third slide seat 14 to fit tightly against the mold core during the injection molding process, effectively reducing the plastic overflow caused by the gap between the slide seat and the mold core, thereby improving the molding quality of the button hole 30 and the lug hole 31.
[0061] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.
Claims
1. An injection mold for a watch case, characterized in that, It includes an upper mold and a lower mold. The upper mold has an upper mold core, and the lower mold has a lower mold core. The upper mold and the lower mold are mated together so that the upper mold core and the lower mold core are mated together to form a mold cavity for molding products. A first sliding structure, a second sliding structure, and a third sliding structure are provided between the upper mold and the lower mold. The first sliding structure includes a first guide post fixed to the upper mold and a first sliding seat slidable to the upper mold. The first sliding seat is connected to a first insert at one end facing the mold cavity. The first insert is provided with a first product contour part that engages with the mold cavity. The second sliding structure includes a second guide post fixed to the upper mold and a second sliding seat that can slide to the lower mold. A second insert is connected to one end of the second sliding seat facing the mold cavity. A second product contour part that abuts against the mold cavity is provided on the second insert. The third row structure includes a third guide post fixed to the upper mold and a third row seat that can slide on the lower mold. The end of the third row seat facing the mold cavity is connected to a third insert, and the third insert is provided with a third product contour part that mates with the mold cavity.
2. The injection mold for a watch case according to claim 1, characterized in that, The upper mold is provided with a first T-groove that slides into the first row seat, and the lower mold is provided with a second T-groove that slides into the second row seat and a third T-groove that slides into the third row seat. The lower mold has a central protrusion that corresponds to the fit between the upper and lower molds. The first T-slot corresponds to the central protrusion in the vertical direction. The second and third T-slots are located on both sides of the central protrusion and correspond to it in the horizontal direction.
3. The injection mold for a watch case according to claim 2, characterized in that, The central protrusion is in the shape of an inverted T, having a horizontal part and a connected vertical part. The horizontal part is used to slide and support the first row seat, and the vertical part cooperates with the second T-shaped groove and the third T-shaped groove on its two sides respectively, providing guidance and limiting for the sliding of the second row seat and the third row seat.
4. The injection mold for a watch case according to claim 2, characterized in that, The first T-slot is provided with a first limiting post that acts as a limiter to the first row seat; The second T-slot is provided with a second limiting post that acts as a limiter on the second row seat; The third T-shaped groove is provided with a third limiting post that acts as a limiter on the third row seat.
5. The injection mold for a watch case according to claim 4, characterized in that, The first row seat is provided with a first limiting groove that cooperates with the first limiting post at the end away from the mold cavity; The second row seat has a second limiting groove that matches the second limiting post at the end furthest from the mold cavity; The third row seat is provided with a third limiting groove at the end away from the mold cavity, which is matched with the third limiting post.
6. The injection mold for a watch case according to claim 1, characterized in that, The first slide seat has a first groove at one end facing the mold cavity, and a first elastic element is provided in the first groove. The end of the first elastic element away from the first slide seat elastically abuts against the side wall of the upper mold core or the inner groove corresponding to the upper mold core.
7. The injection mold for a watch case according to claim 1, characterized in that, The second row seat and the third row seat each have a second groove at one end facing the mold cavity. A second elastic element is provided in the second groove. The end of the second elastic element away from the second row seat or the third row seat elastically abuts against the side wall of the lower mold core or the inner groove corresponding to the lower mold core.