A casting mold for a watch movement case

Abstract

The application discloses a casting mold for a watch movement shell, which comprises a base, a supporting frame arranged on the base, a upper mold box arranged on the supporting frame, a lower mold box arranged on the upper mold box in a claspable manner, a core arranged in the upper mold box and the lower mold box, a mold cavity formed by the upper mold box, the lower mold box and the core, and a sprue cup arranged on the lower mold box, a mold box fastening mechanism comprising a locking piece arranged on the upper mold box and the lower mold box, a pressure medium channel penetrating through the upper mold box and the lower mold box arranged in the locking piece, and a linkage locking mechanism arranged between the upper mold box and the lower mold box. The application can improve the safety of mold opening.

Description

Technical Field

[0001] This invention relates to a casting mold, and more particularly to a casting mold for a watch movement case. Background Technology

[0002] A casting mold is a "cavity model" made in advance from other easily formable materials (such as metal, sand, ceramic, plastic, etc.) to obtain a casting with the required structural shape. Molten metal is then poured into this cavity, and after cooling and solidification, a casting with the same shape as the mold cavity is formed. This forming method is also commonly used in watch movement cases. A corresponding "cavity model" is formed according to the style specified by the customer in advance, and then molten liquid is poured into it and cooled to form the shape. It is often used for mass production of cases.

[0003] Traditional casting molds, after pouring molten metal for a period of time, directly pour cold water onto the outer surface of the mold to cool and solidify the casting quickly. However, this method is not only time-consuming and labor-intensive but also extremely inefficient. Therefore, some existing molds have internal runners for cooling water. This cooling method reduces the cooling time of the casting to some extent, but its cooling effect is very limited compared to castings located in the center of the mold. Furthermore, if the runner is placed in the middle, the water in the runner can easily flow into the casting, resulting in air bubbles or burrs on the core housing, which require a lot of time for secondary processing to repair later.

[0004] Therefore, this case aims to provide a casting mold for watch movement housing, which can not only create a cooling effect in the middle of the casting, but also use the runner cooling as a monitoring method for the cooperation of the upper and lower mold boxes, and cannot be demolded before the entire cooling process is completed, thereby improving the safety of mold opening. Summary of the Invention

[0005] This invention provides a casting mold for watch movement housings, which can effectively solve the above-mentioned problems.

[0006] This invention is implemented as follows:

[0007] A casting mold for a watch movement case, comprising:

[0008] A base, on which a support frame is provided;

[0009] A casting assembly includes an upper mold box mounted on a support frame, a lower mold box that can be opened and closed on the upper mold box, a core disposed inside the upper mold box and the lower mold box, the upper mold box, the lower mold box and the core forming a cavity for forming a casting, and a pouring cup provided on the lower mold box.

[0010] The mold box fastening mechanism includes locking members disposed on the upper mold box and the lower mold box. The locking members are provided with a pressure medium channel passing through the upper mold box and the lower mold box. A linkage locking mechanism is provided between the upper mold box and the lower mold box. When pressure medium is introduced into the pressure medium channel, the linkage locking mechanism locks and fixes the upper mold box and the lower mold box.

[0011] As a further improvement, the locking member includes a template docking structure disposed around the mating surface of the upper mold box and the lower mold box, and an inner core docking structure is disposed in the middle of the mating surface of the upper mold box and the lower mold box, the inner core docking structure being located on the outside of the core.

[0012] As a further improvement, the template docking structure includes several docking columns disposed on the upper mold box, and several docking column cylinders are correspondingly disposed on the side of the lower mold box facing the upper mold box.

[0013] As a further improvement, the inner core docking structure includes a water-locking seat disposed on the upper mold box, the water-locking seat extending into the interior of the upper mold box to provide a first inner cavity cooling channel, a water-locking platform disposed on the lower mold box, the water-locking platform extending into the interior of the lower mold box to provide a second inner cavity cooling channel, and when the upper mold box and the lower mold box are engaged, the water-locking platform and the water-locking seat are engaged.

[0014] As a further improvement, the pressure medium channel includes a first internal flow channel disposed in the upper mold box, and a second internal flow channel disposed inside the lower mold box. The first internal flow channel and the second internal flow channel are respectively connected to the first internal cavity cooling flow channel and the second internal cavity cooling flow channel. The first internal flow channel is connected to the external cold water outlet, and the second internal flow channel is connected to the external water inlet.

[0015] As a further improvement, the linkage locking mechanism is located in the middle area between the template docking structure and the inner core docking structure. The linkage locking mechanism includes an inner chute on the upper mold box. An directional elastic element is provided inside the inner chute. A misalignment element is provided at the top of the directional elastic element. An insertion port is provided in the lower mold box corresponding to the direction of the inner chute.

[0016] As a further improvement, the directional elastic element includes a perforated plate fixed in the middle section of the inner chute, the perforated plate having a flow hole offset to one side, and a return spring installed on the perforated plate.

[0017] As a further improvement, the misalignment component is a wedge-shaped block, and when the wedge-shaped block is inserted into the insertion port, the upper mold box and the lower mold box cannot be separated.

[0018] As a further improvement, the lower end of the inner chute is connected to an inner flow channel branch, which communicates with the first inner flow channel.

[0019] As a further improvement, an elastic ring is provided on the inner side of the water-locking platform.

[0020] The beneficial effects of this invention are:

[0021] The existing cooling channels have poor cooling effect. If the channels are placed directly in the middle, the water in the channels can easily flow into the casting, resulting in air bubbles or burrs on the core housing. This requires a lot of time for secondary processing to repair. Therefore, this invention uses a mold box fastening mechanism to place the channels on the locking parts inside the two mold boxes. This allows the original channels on the mold to be guided into the locking parts to form a new pressure medium channel, allowing cold water to circulate from the top to the bottom. The cold water flow path surrounds the casting, which can quickly cool the casting in the central area.

[0022] Furthermore, since the new pressure medium channel requires a tight fit between the upper and lower mold boxes, if the fit is not tight enough, cooling water will leak out from the gap between them. Therefore, if the fit is not tight enough, the operator will immediately notice and adjust the mold in time, thereby improving the yield rate of the entire batch.

[0023] During the assembly process of the new pressure medium channel, if the mold is opened directly before the cooling is completed, it is easy to cause water leakage and demolding failure. Therefore, the present invention provides a linkage locking mechanism between the upper mold box and the lower mold box. When there is still fluid in the pressure medium channel, the linkage locking mechanism will lock the upper mold box and the lower mold box, thereby ensuring that the casting has been shaped after the mold box is opened.

[0024] The locking component in this invention differs from traditional locking components. It firstly possesses the template docking structure of traditional locking components, and secondly it also has an inner core docking structure for positioning the shaft center, thereby enabling the mold box to dock more accurately, while simultaneously creating a new channel for the pressure medium.

[0025] Since cold water flows inside the inner core docking structure, ordinary docking structures are prone to leakage at this point. Therefore, the inner core docking structure of this invention is provided with a water-locking seat and a water-locking platform, which can form a sealed area at the docking position of the upper mold box and the lower mold box, thereby ensuring that high-pressure water will not leak at this point when it passes through.

[0026] The pressure medium channel is actually composed of the first inner flow channel in the upper mold box, the second inner flow channel in the lower mold box, as well as the first inner cavity cooling flow channel and the second inner cavity cooling flow channel. This allows the cooling water entering the second inner flow channel to cool the lower mold box, and then flow into the first inner cavity cooling flow channel and the second inner cavity cooling flow channel to cool the area around the casting. Finally, the water flows out from the first inner flow channel and cools the upper mold box. The cooled water is now lukewarm.

[0027] During the use of the linkage locking mechanism, operators can only open the mold based on experience or a predetermined time. They often forget to close the cooling water valve when opening the mold, resulting in the mold being sprayed with cooling water after opening. If the mold is not completely solidified at this time, it will cause air holes to appear in the mold. Therefore, the linkage locking mechanism of the present invention is provided with a directional elastic element and a misalignment element. When the misalignment element is subjected to water pressure, it will rise and embed into the insertion hole, so that the upper mold box and the lower mold box are tightly locked together. Thus, the upper mold box and the lower mold box cannot be opened under water cooling, thus preventing water from spraying out.

[0028] Since the linkage locking mechanism is located inside the mold, it is difficult to set up a driving structure, and it also requires a certain amount of power. Therefore, the linkage locking mechanism of the present invention is provided with an internal flow channel branch that communicates with the internal chute to provide power to the linkage locking mechanism. Although the linkage locking mechanism can fall back by its own weight, in order to ensure that it is reset in place, the present invention also provides a directional elastic element, which pulls the misaligned part back to its original position by a reset spring. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0031] Figure 2 This is a top view of the structure of the present invention.

[0032] Figure 3 This is the present invention. Figure 2 Section at point AA.

[0033] Figure 4 This is the present invention. Figure 3 The retracted diagram.

[0034] Figure 5 This is an exploded view (view from below) of the present invention.

[0035] In the picture:

[0036] Base 10, support frame 11, casting mold assembly 20, lower mold box 21, upper mold box 22, pouring cup 23, mold box fastening mechanism 30, template docking structure 311, docking column 3111, docking column cylinder 3112, inner core docking structure 312, water-locking seat 3121, first inner cavity cooling channel 3122, water-locking platform 3123, second inner cavity cooling channel 3124, elastic ring 3125, pressure medium channel 32, first inner channel 321, second inner channel 322, linkage locking mechanism 33, inner chute 331, directional elastic element 332, hollow plate 3321, flow hole 3322, return spring 3323, misalignment element 333, embedding port 334, inner channel branch 335. Detailed Implementation

[0037] All embodiments of the present invention are intended to fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating that the purpose, technical solution, and advantages of the method are clearer. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort indicate or imply the relative importance of the indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Reference Figures 1-5As shown, a casting mold for a watch movement case includes: a base 10, on which a support frame 11 is provided; a casting assembly 20, including an upper mold box 22 disposed on the support frame 11, a lower mold box 21 disposed on the upper mold box 22 and closable, a core disposed within the upper mold box 22 and the lower mold box 21, the upper mold box 22, the lower mold box 21 and the core forming a cavity for casting, and a pouring cup 23 provided on the lower mold box 21; and a mold box fastening mechanism 30, including a locking member disposed on the upper mold box 22 and the lower mold box 21, a pressure medium channel 32 passing through the upper mold box 22 and the lower mold box 21 disposed within the locking member, and a linkage locking mechanism 33 disposed between the upper mold box 22 and the lower mold box 21, wherein when pressure medium is introduced into the pressure medium channel 32, the linkage locking mechanism 33 locks and fixes the upper mold box 22 and the lower mold box 21.

[0040] The existing cooling channels have poor cooling effect. If the channels are placed directly in the middle, the water in the channels can easily flow into the casting, resulting in some air bubbles or burrs on the core housing. It takes a lot of time to process and repair them later. Therefore, the present invention uses a mold box fastening mechanism 30 to set the channels on the locking parts inside the two mold boxes. This allows the original channels on the mold to be guided into the locking parts to form a new pressure medium channel 32, so that cold water can circulate from the top to the bottom. The cold water flow path surrounds the casting, which can quickly cool the casting in the central area.

[0041] Furthermore, since the new pressure medium channel 32 requires a tight fit between the upper mold box 22 and the lower mold box 21, if the fit is not tight enough, cooling water will leak out from the gap between them. Therefore, if the fit is not tight enough, the operator will immediately notice and adjust the mold in time, thereby improving the yield rate of the entire batch.

[0042] During the fitting process of the new pressure medium channel 32, if the mold is opened directly before the cooling is completed, it is easy to cause water leakage and demolding failure. Therefore, the present invention provides a linkage locking mechanism 33 between the upper mold box 22 and the lower mold box 21. When there is still fluid in the pressure medium channel 32, the linkage locking mechanism 33 will lock the upper mold box 22 and the lower mold box 21, thereby ensuring that the casting has been shaped after the mold box is opened.

[0043] The locking component in this embodiment differs from traditional locking components. Specifically, the locking component includes a template docking structure 311 disposed around the docking surface of the upper mold box 22 and the lower mold box 21. An inner core docking structure 312 is disposed in the middle of the docking surface of the upper mold box 22 and the lower mold box 21. The inner core docking structure 312 is located on the outside of the mold core. It first has the template docking structure 311 of a traditional locking component, and also has an inner core docking structure 312 for positioning the axis, thereby enabling the mold boxes to dock more accurately and simultaneously creating a new channel for the pressure medium channel 32.

[0044] In this embodiment, the template docking structure 311 is a conventional guide structure. Specifically, the template docking structure 311 includes several docking posts 3111 disposed on the upper mold box 22, and several docking post cylinders 3112 are disposed on the side of the lower mold box 21 facing the upper mold box 22, so that the upper mold box 22 and the lower mold box 21 can be stably matched during mold closing.

[0045] Because cold water flows inside the inner core docking structure 312, ordinary docking structures would easily cause leakage at this point. Therefore, the inner core docking structure 312 in this embodiment includes a water-locking seat 3121 disposed on the upper mold box 22. The water-locking seat 3121 extends into the upper mold box 22 and is provided with a first inner cavity cooling channel 3122. The lower mold box 21 is provided with a water-locking platform 3123. The water-locking platform 3123 extends into the lower mold box 21 and is provided with a second inner cavity cooling channel 3124. When the upper mold box 22 and the lower mold box 21 are engaged, the water-locking platform 3123 engages with the water-locking seat 3121. The inner core docking structure 312 is provided with the water-locking seat 3121 and the water-locking platform 3123, thereby forming a sealed area at the docking position of the upper mold box 22 and the lower mold box 21, thus ensuring that high-pressure water will not leak at this point when it passes through.

[0046] To ensure a stable fit between the water-locking platform 3123 and the water-locking seat 3121, an elastic ring 3125 is provided on the inner side of the water-locking platform 3123 in this embodiment. The elastic ring 3125 will compensate for the dimensional error of the water-locking platform 3123 during processing when the water-locking seat 3121 and the water-locking platform 3123 are fitted together.

[0047] The pressure medium channel 32 is actually composed of a first inner flow channel 321 inside the upper mold box 22, a second inner flow channel 322 inside the lower mold box 21, a first inner cavity cooling flow channel 3122, and a second inner cavity cooling flow channel 3124. Specifically, the pressure medium channel 32 includes a first inner flow channel 321 disposed inside the upper mold box 22, and a second inner flow channel 322 disposed inside the lower mold box 21. The first inner flow channel 321 and the second inner flow channel 322 are respectively connected to the first inner cavity cooling flow channel 31. 22. On the second inner cavity cooling channel 3124, the first inner channel 321 is connected to the external cold water outlet, and the second inner channel 322 is connected to the external water inlet. This allows the cooling water entering the second inner channel 322 to cool the lower mold box 21 before flowing into the first inner cavity cooling channel 3122 and the second inner cavity cooling channel 3124 to cool the area around the casting. Finally, the water flows out from the first inner channel 321 and cools the upper mold box 22. The cooled water is now warm water.

[0048] During the use of the linkage locking mechanism 33, the operator can only open the mold based on experience or a predetermined time. Furthermore, they often forget to close the cooling water valve during opening, causing the mold to be sprayed with cooling water after opening. If the mold is not fully cured at this time, air holes will appear in the mold. Therefore, in this embodiment, the linkage locking mechanism 33 is located in the middle area between the template docking structure 311 and the inner core docking structure 312. The linkage locking mechanism 33 includes an inner chute 331 provided on the upper mold box 22. An directional elastic element 332 is provided inside the chute 331, and a misalignment element 333 is provided at the top of the directional elastic element 332. The lower mold box 21 is provided with an insertion port 334 corresponding to the direction of the inner chute 331. The linkage locking mechanism 33 is provided with an directional elastic element 332 and a misalignment element 333. When the misalignment element 333 is subjected to water pressure, it will rise and be inserted into the insertion port 334, so that the upper mold box 22 and the lower mold box 21 are tightly locked together. Thus, the upper mold box 22 and the lower mold box 21 cannot be opened under water cooling conditions, thus preventing water from splashing out.

[0049] To allow cold water to pass through, the directional elastic element 332 includes a perforated plate 3321 fixed in the middle section of the inner chute 331. The perforated plate 3321 has a flow hole 3322 that is offset to one side. A return spring 3323 is installed on the perforated plate 3321. Water can pass through and retract through the flow hole 3322 of the perforated plate 3321. After all the water has flowed away, the return spring 3323 will pull the misaligned element 333 back. The misaligned element 333 also has a certain weight of its own, which will press down the return spring 3323.

[0050] In this embodiment, in order to fix the upper mold box 22 and the lower mold box 21, the misalignment member 333 is a wedge-shaped block. When the wedge-shaped block is inserted into the insertion port 334, the upper mold box 22 and the lower mold box 21 cannot be separated.

[0051] Since the linkage locking mechanism 33 is located inside the mold, it is difficult to set up a driving structure, and it also requires a certain amount of power. Therefore, in this embodiment, the lower end of the inner chute 331 is connected to an inner flow channel branch 335, which is connected to the first inner flow channel 321. The linkage locking mechanism 33 is provided with an inner flow channel branch 335 that is connected to the inner chute 331 to provide power to the linkage locking mechanism 33. Although the linkage locking mechanism 33 can fall back by its own weight.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A casting mold for a watch movement case, characterized in that, include: A base (10) is provided with a support frame (11). The casting mold assembly (20) includes an upper mold box (22) disposed on a support frame (11), a lower mold box (21) disposed on the upper mold box (22) and the lower mold box (21) are provided with a core, the upper mold box (22), the lower mold box (21) and the core are enclosed to form a cavity for forming the casting, and a pouring cup (23) is provided on the lower mold box (21). The mold box fastening mechanism (30) includes a locking member disposed on the upper mold box (22) and the lower mold box (21). The locking member is provided with a pressure medium channel (32) that passes through the upper mold box (22) and the lower mold box (21). A linkage locking mechanism (33) is provided between the upper mold box (22) and the lower mold box (21). When pressure medium is introduced into the pressure medium channel (32), the linkage locking mechanism (33) locks and fixes the upper mold box (22) and the lower mold box (21). The locking component includes a template docking structure (311) disposed around the docking surface of the upper mold box (22) and the lower mold box (21), and an inner core docking structure (312) is disposed in the middle of the docking surface of the upper mold box (22) and the lower mold box (21), and the inner core docking structure (312) is located on the outside of the core. The linkage locking mechanism (33) is located in the middle area between the template docking structure (311) and the inner core docking structure (312). The linkage locking mechanism (33) includes an inner chute (331) on the upper mold box (22). An directional elastic element (332) is provided inside the inner chute (331). A misalignment element (333) is provided at the top of the directional elastic element (332). An insertion port (334) is provided in the lower mold box (21) in the direction corresponding to the inner chute (331). The directional elastic element (332) includes a hollow plate (3321) fixed in the middle section of the inner chute (331). The hollow plate (3321) has a flow hole (3322) that is offset to one side, and a return spring (3323) is installed on the hollow plate (3321).

2. The casting mold for a watch movement case according to claim 1, characterized in that, The template docking structure (311) includes a number of docking columns (3111) arranged on the upper mold box (22), and a number of docking column cylinders (3112) are arranged on the side of the lower mold box (21) facing the upper mold box (22).

3. A casting mold for a watch movement case according to claim 2, characterized in that, The inner core docking structure (312) includes a water-locking seat (3121) disposed on the upper mold box (22). The water-locking seat (3121) extends into the interior of the upper mold box (22) and is provided with a first inner cavity cooling channel (3122). A water-locking platform (3123) is disposed on the lower mold box (21). The water-locking platform (3123) extends into the interior of the lower mold box (21) and is provided with a second inner cavity cooling channel (3124). When the upper mold box (22) and the lower mold box (21) are engaged, the water-locking platform (3123) engages with the water-locking seat (3121).

4. A casting mold for a watch movement case according to claim 1, characterized in that, The pressure medium channel (32) includes a first internal flow channel (321) disposed in the upper mold box (22), and a second internal flow channel (322) disposed inside the lower mold box (21). The first internal flow channel (321) and the second internal flow channel (322) are respectively connected to the first internal cavity cooling flow channel (3122) and the second internal cavity cooling flow channel (3124). The first internal flow channel (321) is connected to the external cold water outlet, and the second internal flow channel (322) is connected to the external water inlet.

5. A casting mold for a watch movement case according to claim 1, characterized in that, The misalignment component (333) is a wedge-shaped block. When the wedge-shaped block is inserted into the embedding port (334), the upper mold box (22) and the lower mold box (21) cannot be separated.

6. A casting mold for a watch movement case according to claim 1, characterized in that, The lower end of the inner chute (331) is connected to an inner flow channel branch (335), which is connected to the first inner flow channel (321).

7. A casting mold for a watch movement case according to claim 3, characterized in that, An elastic ring (3125) is provided on the inner side of the water-locking platform (3123).

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