Forming die for rubber ventilation valve of battery

Abstract

The invention discloses a battery rubber ventilation valve forming mold, and belongs to the technical field of rubber ventilation valves. The battery rubber ventilation valve forming mold is used for manufacturing an umbrella-shaped battery rubber ventilation valve, the edges of adjacent umbrella rib grooves and the inner side edge of an outer edge ring groove jointly form an umbrella face protrusion, and a binding face and a flow stopping protruding edge are formed on the top face of the umbrella face protrusion; the flow stopping protruding edges surround the binding face in the circumferential direction, and the binding face is sunken relative to the flow stopping protruding edges. When the mold is closed, the binding surface is flush with the top of the accommodating space, and the flow stopping convex edge extends into the accommodating space; and a glue overflowing cavity is formed between the middle mold and the lower mold and surrounds the mold cavity. Glue drilling on the surface of the breathable film can be effectively prevented in the vulcanization forming process of the rubber waterproof breathable valve.

Description

Technical Field

[0001] The invention relates to the technical field of battery rubber vent valve molding, and more specifically to a battery rubber vent valve molding die. Background Art

[0002] In the new energy vehicle battery industry, the rubber waterproof breathable valve is a key part of the power battery. It can ensure the discharge of hot air inside the battery and filter out smoke and harmful gases in the hot air. Therefore, it is widely used in the field of power batteries.

[0003] For example, a Chinese patent document (publication number: CN 213278312 U) provides a pressure relief valve for a battery pack, which includes a lower shell, an upper shell and a valve body. The lower shell is installed on the outer shell of the battery pack; the upper shell is installed on the lower shell, and the upper shell and the lower shell form a valve inner space; the valve body is installed on the lower shell, the valve body is in sealing contact with the lower shell and divides the valve inner space into an inner space and an outer space, the valve body includes a mounting bracket, an elastic component and a breathable membrane, the mounting bracket is connected to the elastic component as a whole, the mounting bracket is installed on the lower shell, the elastic component surrounds the breathable membrane to surround the breathable membrane in the central area, the elastic component is in the peripheral area, and the elastic component is interference fit with the inner wall of the lower shell to form a sealed contact; the inner space is connected to the inside of the battery pack, and the outer space is connected to the outside, the difference between the pressure inside the battery pack and the outside pressure is less than a threshold value, and the pressure is balanced through the breathable membrane. The difference between the pressure inside the battery pack and the outside pressure is greater than or equal to the threshold value, the elastic component is deformed and separated from the inner wall of the lower shell, forming a pressure relief channel to quickly balance the pressure, and the difference between the pressure inside the battery pack and the outside pressure is restored to less than the threshold value, and the elastic component is restored and is in sealing contact with the inner wall of the lower shell again.

[0004] In detail, Figure 1 , 2 As shown, the structure of the rubber waterproof breathable valve 1 is composed of a breathable membrane 11 and a rubber part 12. The breathable membrane is a soft polymer material, and its structure is similar to that of a sponge, but the breathable holes are very small. During the vulcanization molding process of the rubber waterproof breathable valve, workers need to put the breathable membrane into a mold, and then bond the breathable membrane and the rubber into a whole through injection molding.

[0005] Since the rubber compound becomes liquid during the vulcanization process, the inner air permeable surface 11a of the breathable membrane 11 (the area not covered by the rubber compound) is very easy to be drilled by the rubber compound. After the inner air permeable surface 11a of the breathable membrane 11 is drilled by the rubber compound, the function of the drilled area will be invalid, and it will not be able to effectively ventilate or filter air, which not only greatly affects the appearance of the rubber waterproof breathable valve, but also affects the quality of the rubber waterproof breathable valve.

[0006] Therefore, how to prevent rubber from drilling on the surface of the breathable membrane during the vulcanization molding process of the rubber waterproof breathable valve is an urgent problem to be solved in the industrial production of rubber waterproof breathable valves. Summary of the invention

[0007] In order to solve the technical problems that may exist in the related art, the present invention provides a battery rubber breathable valve molding die, which is used to manufacture an umbrella-shaped battery rubber breathable valve, comprising: an upper die, a middle die and a lower die; the upper die, the middle die and the lower die are used to form a cavity in combination; the lower die is formed with a containing space, and the containing space is used to place a breathable membrane; an umbrella frame groove is formed at the bottom of the middle die; the umbrella frame groove comprises an outer edge ring groove and a plurality of umbrella rib grooves; the plurality of umbrella rib grooves are circumferentially arranged on the inner side of the outer edge ring groove; the umbrella frame groove comprises an outer edge ring groove and a plurality of umbrella rib grooves ... The rib groove extends along the radial direction of the outer edge ring groove; the adjacent edges of the rib grooves and the inner sides of the outer edge ring groove together constitute an umbrella surface protrusion, and the top surface of the umbrella surface protrusion is formed with a fitting surface and a flow-stopping ridge; the flow-stopping ridge circumferentially surrounds the fitting surface, and the fitting surface is recessed relative to the flow-stopping ridge; when the mold is closed, the fitting surface is flush with the top of the accommodating space, and the flow-stopping ridge extends into the accommodating space; an overflow cavity is formed between the middle mold and the lower mold, and the overflow cavity surrounds the mold cavity.

[0008] Furthermore, the depth D1 of the overflow glue cavity is more than 4 times the width D2 of the overflow glue cavity; the depth D1 of the overflow glue cavity is 3.5 mm to 4 mm, and the width D2 of the overflow glue cavity is 0.3 mm to 0.45 mm.

[0009] Furthermore, a pressurized surface is formed between the overflow glue cavity and the mold cavity, the depth of the pressurized surface is 0, and a plurality of drainage grooves are arranged on the pressurized surface, one end of the drainage groove is connected to the mold cavity, and the other end of the drainage groove is connected to the overflow glue cavity, so that the glue in the mold cavity flows from the drainage groove to the overflow glue cavity.

[0010] Furthermore, all the drainage grooves are evenly arranged around the center circumference of the lower mold.

[0011] Furthermore, the width Z1 of the drainage groove is 1 mm to 2 mm, and the depth Z2 of the drainage groove is 0.7 mm to 1.3 mm.

[0012] Furthermore, the height L1 of the accommodating space is 0.5 mm to 0.6 mm, and the height L2 of the flow-stopping ridge is 0.35 mm to 0.4 mm.

[0013] Furthermore, the top of the flow-stopping ridge is a plane, and the width L3 of the flow-stopping ridge is 0.3 mm to 0.5 mm.

[0014] Furthermore, the middle mold and the lower mold jointly form a first tearing groove, the first tearing groove surrounds the cavity, and the first tearing groove is located between the overflow cavity and the cavity; an overflow gap is arranged between the first tearing groove and the cavity; the height B1 of the overflow gap is 0.07mm to 0.15mm, and the width B2 of the overflow gap is 0.25mm to 0.35mm.

[0015] Furthermore, a distance C between the overflow cavity and the first tear edge groove is 2.5 mm to 5 mm.

[0016] Furthermore, a pressure surface is formed between the overflow glue cavity and the first tear edge groove, the depth of the pressure surface is 0, and a plurality of drainage grooves are arranged on the pressure surface. One end of the drainage groove is connected to the first tear edge groove, and the other end of the drainage groove is connected to the overflow glue cavity, so that the glue in the first tear edge groove flows from the drainage groove to the overflow glue cavity.

[0017] Furthermore, it also includes a glue injection channel, which is connected to the cavity; the glue injection channel includes a glue inlet and a glue outlet, the glue inlet is located at the top of the upper mold, and the glue outlet is located at the bottom of the middle mold, so that the glue overflows the cavity from the middle position of the cavity.

[0018] Furthermore, each of the umbrella rib grooves is provided with a glue injection port, and all the glue injection ports are evenly arranged around the center of the umbrella rib groove.

[0019] Furthermore, an air storage groove is formed at the bottom of the upper mold, and the air storage groove is located at the top of the cavity and communicated with the cavity.

[0020] Furthermore, the air storage groove is cylindrical, the air storage groove is located at the center of the top of the cavity, and the bottom surface area of ​​the air storage groove is less than one half of the top surface area of ​​the cavity.

[0021] Furthermore, the depth A1 of the air storage groove is 3 mm to 4 mm, and the diameter A2 of the air storage groove is 2 mm to 3 mm.

[0022] Furthermore, a mold core protruding upward is formed at the center of the lower mold, and the accommodating space is annular and surrounds the mold core.

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] The battery rubber breathable valve molding mold in the present application has a stopper ridge on the umbrella surface of the middle mold, and the stopper ridge can prevent the rubber from entering the inner breathable surface of the breathable membrane to a certain extent. At the same time, the mold is also provided with a rubber overflow cavity between the middle mold and the lower mold, so that the rubber is stopped by the stopper ridge and then flows out to the rubber overflow cavity, thereby avoiding excessive pressure in the mold cavity causing the rubber to pass through the stopper ridge and enter the inner breathable membrane of the breathable membrane, solving the problem of the breathable membrane's air permeability failure due to rubber drilling into the glue, and significantly improving the production quality of rubber waterproof breathable valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0026] Figure 1 This is a schematic diagram of the finished product structure of a battery rubber vent valve;

[0027] Figure 2 Yes Figure 1 Another perspective diagram of the finished structure of the battery rubber vent valve shown;

[0028] Figure 3 It is a structural schematic diagram of a battery rubber vent valve molding die according to an embodiment of the present application;

[0029] Figure 4 It is a schematic cross-sectional structure diagram of a battery rubber vent valve forming mold according to an embodiment of the present application;

[0030] Figure 5 It is a schematic diagram of the structure of the middle mold of the battery rubber vent valve molding mold according to an embodiment of the present application from a bottom view;

[0031] Figure 6 It is a schematic diagram of the middle mold structure of a battery rubber vent valve molding mold according to an embodiment of the present application;

[0032] Figure 7 Yes Figure 6 A schematic diagram of a partially enlarged structure of a middle mold is shown;

[0033] Figure 8 It is a partially enlarged schematic diagram of the cross-sectional structure of a battery rubber vent valve molding die according to an embodiment of the present application;

[0034] Fig. 9 Yes Figure 8 The schematic diagram of a partial enlarged cross-sectional structure of a battery rubber vent valve molding die shown;

[0035] Fig.10 Yes Figure 8The schematic diagram of a partial enlarged cross-sectional structure of a battery rubber vent valve molding die shown;

[0036] Fig.11 It is a schematic diagram of the lower mold structure of a battery rubber vent valve molding mold according to an embodiment of the present application;

[0037] Fig.12 It is a partially enlarged schematic diagram of the cross-sectional structure of a battery rubber vent valve molding die according to an embodiment of the present application;

[0038] Fig.13 It is a partially enlarged schematic diagram of the cross-sectional structure of a battery rubber vent valve molding die according to an embodiment of the present application;

[0039] Fig.14 It is a partially enlarged schematic diagram of the cross-sectional structure of a battery rubber vent valve molding die according to an embodiment of the present application;

[0040] Description of labels:

[0041] 1. Rubber waterproof breathable valve; 11. Breathable membrane; 11a. Inner breathable surface; 12. Rubber;

[0042] 100, upper mold; 110, glue injection channel; 111, glue inlet; 112, glue outlet; 120, air storage tank;

[0043] 200, middle mold; 210, umbrella frame groove; 211, outer edge ring groove; 212, umbrella rib groove; 220, umbrella surface protrusion; 221, fitting surface;

[0044] 222, flow-stopping ridge;

[0045] 300, lower mold; 310, accommodating space; 320, mold core;

[0046] 400, cavity;

[0047] 500, overflow glue cavity;

[0048] 600, pressurized surface; 610, drainage groove;

[0049] 700, first tearing edge groove; 710, overflow gap;

[0050] 800. Second tear edge groove. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0053] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0054] like Figure 3 , 4 As shown, the present application provides a battery rubber breathable valve molding mold for manufacturing an umbrella-shaped battery rubber breathable valve, including an upper mold 100, a middle mold 200 and a lower mold 300; the upper mold 100, the middle mold 200 and the lower mold 300 are used to combine to form a cavity 400.

[0055] like Figure 4 As shown, the lower mold 300 is formed with a receiving space 310, and the receiving space 310 is used to place the breathable membrane. The receiving space 310 is generally circular or annular, and is adapted to the shape and size of the breathable membrane.

[0056] As an alternative, Figure 4As shown, the center of the lower mold 300 is formed with a mold core 320 protruding upward, and the accommodating space 310 is annular and surrounds the mold core 320. The mold is mainly adapted to annular breathable membranes, and the rubber part of the finished product of the battery rubber breathable valve has a slot in the center, and the user can insert the auxiliary rod into the slot, so as to insert the relatively soft battery rubber breathable valve into other components of the battery pressure relief valve. After the battery rubber breathable valve and other components are matched, the user takes the auxiliary rod out of the slot, thereby completing the rapid assembly of the battery pressure relief valve.

[0057] As another optional solution, the center of the lower mold 300 may not have the mold core 320, and the accommodating space 310 is circular to fit the circular breathable membrane.

[0058] like Figure 5 , 6 As shown, an umbrella frame groove 210 is formed at the bottom of the middle mold 200, and the umbrella frame groove 210 includes an outer edge groove 211 and a plurality of rib grooves 212. The plurality of rib grooves 212 are circumferentially arranged on the inner side of the outer edge groove 211, and the rib grooves 212 extend along the radial direction of the outer edge groove 211. The number of the rib grooves 212 can be 3, 5, 6 or 8, etc., and this embodiment does not make any specific limitation here.

[0059] In order to solve the problem of rubber waterproof breathable valve surface rubber drilling during the vulcanization molding process, such as Figure 7 , 8 As shown, the edges of the adjacent rib grooves 212 and the inner side edges of the outer edge groove 211 together form an umbrella surface protrusion 220, and the top surface of the umbrella surface protrusion 220 is formed with a fitting surface 221 and a flow-stopping rib 222; the flow-stopping rib 222 circumferentially surrounds the fitting surface 221, and the fitting surface 221 is concave relative to the flow-stopping rib 222; when the mold is closed, the fitting surface 221 is flush with the top of the accommodating space 310, and the flow-stopping rib 222 extends into the accommodating space 310. Figure 8 As shown, an overflow cavity 500 is formed between the middle mold 200 and the lower mold 300 , and the overflow cavity 500 surrounds the mold cavity 400 .

[0060] Specifically, there is a certain distance between the overflow cavity 500 and the mold cavity 400 , that is, they are not directly connected.

[0061] Therefore, combined with Figure 8As shown, the battery rubber breathable valve molding mold in the present application forms a stopper rib 222 on the umbrella protrusion 220 of the middle mold 200. The stopper rib 222 can prevent the rubber from entering the inner breathable surface of the breathable membrane to a certain extent. At the same time, the mold is also provided with a rubber overflow cavity 500 between the middle mold 200 and the lower mold 300, so that the rubber is blocked by the stopper rib 222 and then flows out to the rubber overflow cavity 500, thereby avoiding excessive pressure in the mold cavity causing the rubber to pass through the stopper rib 222 and enter the inner breathable membrane of the breathable membrane, solving the problem of the breathable membrane's air permeability failure due to rubber drilling glue, and significantly improving the production quality of rubber waterproof breathable valves.

[0062] Since the waterproof breathable membrane is made of a soft polymer material, if the overflow glue cavity 500 is not provided and only the flow-stopping rib 222 is used to seal the glue, the flow-stopping rib 222 needs to be set very high, which will cause the waterproof breathable membrane to be pressed through. If the overflow glue cavity 500 is not provided and the flow-stopping rib 222 is set too low, the glue cannot be sealed. After the overflow glue cavity 500 is provided, it can effectively cooperate with the flow-stopping rib 222 to prevent the glue from entering the inner hole of the waterproof breathable membrane.

[0063] As a comparative example, if the overflow cavity 500 is not provided, the overall width of the mold is narrowed so that the rubber flows directly from the cavity 400 to the outside of the mold. Although this design can also prevent the rubber from drilling through the inner breathable surface of the breathable membrane, it may cause the pressure in the cavity 400 to be too low and lack of material, and the material body cannot fill the cavity 400.

[0064] Specifically, if Fig. 9 As shown, the depth D1 of the overflow cavity 500 is more than 4 times the width D2 of the overflow cavity 500; more specifically, the depth D1 of the overflow cavity 500 is 3.2mm to 4mm, for example, D1 is 3.3mm, 3.6mm or 3.8mm, etc., and the width D2 of the overflow cavity 500 is 0.3mm to 0.45mm, D2 is 0.35mm, 0.38mm, 0.41mm or 0.42mm, etc. The depth D1 of the overflow cavity 500 is much larger than the width D2 of the overflow cavity 500, which can ensure the volume of the overflow cavity 500 while reducing the influence of the overflow cavity 500 itself on the internal pressure of the mold. If D2 is much larger than D1, the edge of the overflow cavity 500 will be closer to the edge of the overall mold, causing the pressure in the mold to be easily lost excessively at the overflow cavity 500.

[0065] As an alternative, Fig.10 As shown, the height L1 of the accommodating space 310 is 0.5mm to 0.6mm, which is suitable for the thickness of most breathable films on the market, and the height L2 of the flow-stopping rib 222 is 0.35mm to 0.4mm. The flow-stopping rib 222 can effectively stop the flow and avoid pressing through the breathable film during hot pressing.

[0066] Preferably, Fig.10 As shown, since the flow-stop rib 222 will also cause thermal damage to the surface of the breathable membrane to a certain extent, the top of the flow-stop rib 222 is a plane, and the width L3 of the flow-stop rib 222 is 0.3mm to 0.5mm. This design can minimize the damage of the flow-stop rib 222 to the breathable membrane on the basis of the flow-stop rib 222 being able to stop the flow.

[0067] As an optimization solution, Fig.11 , 12 As shown, in order to ensure the passability of the glue between the overflow glue cavity 500 and the cavity 400, a pressurizing surface 600 is formed between the overflow glue cavity 500 and the cavity 400, the depth of the pressurizing surface 600 is 0, and a plurality of drainage grooves 610 are arranged on the pressurizing surface 600, one end of the drainage groove 610 is connected to the cavity 400, and the other end of the drainage groove 610 is connected to the overflow glue cavity 500, so that the glue in the cavity 400 flows from the drainage groove 610 to the overflow glue cavity 500, and the drainage groove 610 can further reduce the possibility of the glue passing through the stop-flow rib 222 and entering the air permeable surface of the air permeable membrane, and the pressurizing surface 600 can also increase the contact area between the middle mold 200 and the lower mold 300 between the overflow glue cavity 500 and the cavity 400, reduce the influence of the overflow glue cavity 500 on the pressure in the cavity 400, and prevent the lack of glue in the cavity 400 due to pressure loss.

[0068] It is worth emphasizing that the drainage groove 610 here can be directly connected to the cavity 400, and can also be indirectly connected to the cavity 400 through a design such as a tear edge groove.

[0069] Specifically, all the drainage grooves 610 are evenly arranged around the center of the lower mold 300 , and the rubber material in the cavity 400 flows out evenly, so that the pressure in the cavity 400 is balanced.

[0070] Optional, such as Fig.12 As shown, the width Z1 of the drainage groove 610 is 1 mm to 2 mm, and the depth Z2 of the drainage groove 610 is 0.7 mm to 1.3 mm.

[0071] As a further solution of the above optimization scheme, Fig.12 As shown, the middle mold 200 and the lower mold 300 jointly form a first tearing groove 700, the first tearing groove 700 surrounds the cavity 400, and the first tearing groove 700 is located between the overflow cavity and the cavity 400; an overflow gap 710 is provided between the first tearing groove 700 and the cavity 400. In detail, after the battery rubber vent valve is vulcanized in the mold, the rubber material forms tearing ribs in the first tearing groove 700, and a thinner flash is formed between the first tearing groove 700 and the cavity 400 at the overflow gap 710. The user can pull the tearing ribs to directly remove all the excess rubber material on the battery rubber vent valve body (such as the rubber material in the drainage groove 610 and the overflow cavity 500) synchronously, thereby reducing the burden of trimming for workers.

[0072] In detail, Fig.12 As shown, a pressure surface 600 is formed between the overflow glue cavity 500 and the first tear edge groove 700, the depth of the pressure surface 600 is 0, and a plurality of drainage grooves 610 are arranged on the pressure surface 600. One end of the drainage groove 610 is connected to the first tear edge groove 700, and the other end of the drainage groove 610 is connected to the overflow glue cavity 500, so that the glue in the first tear edge groove 700 flows from the drainage groove 610 to the overflow glue cavity 500.

[0073] As a specific solution, Fig.12 As shown, the distance C between the overflow cavity 500 and the first tear edge groove 700 is 2.5 mm to 5 mm. Within this numerical range, the pressure in the cavity 400 can be guaranteed and the glue can flow into the overflow cavity 500 better.

[0074] Specifically, if Fig.13 As shown, the height B1 of the overflow gap 710 is 0.07 mm to 0.15 mm, for example, B1 is 0.08 mm, 0.1 mm or 0.12 mm, etc., and the width B2 of the overflow gap 710 is 0.25 mm to 0.35 mm, for example, B2 is 0.28 mm, 0.3 mm or 0.31 mm, etc.

[0075] Further, such as Fig.14 As shown, a second tearing edge groove 800 surrounding the cavity 400 is formed between the upper mold 100 and the middle mold 200 , and an overflow gap is also provided between the second tearing edge groove 800 and the cavity 400 .

[0076] like Fig.14 As shown, a battery rubber breathable valve molding mold of this embodiment also includes a glue injection channel 110, and the glue injection channel 110 is connected to the cavity 400; the glue injection channel 110 includes a glue inlet 111 and a glue outlet 112, the glue inlet 111 is located at the top of the upper mold 100, and the glue outlet 112 is located at the bottom of the middle mold 200, so that the glue overflows the cavity 400 from the middle position of the cavity 400. That is, the glue in this embodiment enters the cavity 400 from the bottom of the middle mold 200 and fills the entire cavity 400 from bottom to top. This design is mainly based on the material properties of the breathable membrane. Since the breathable membrane material is relatively soft, if the glue outlet 112 of the glue injection channel 110 is set at the upper mold 100, and the glue is injected at the upper part of the cavity 400, then the impact force of the glue on the breathable membrane will be too large, and the membrane will be deformed, thereby affecting the quality of the battery rubber breathable valve. This improvement of this embodiment well avoids the above problem.

[0077] Further, see Figure 5As shown, each rib groove 212 is provided with a glue inlet 111, and all the glue injection ports are evenly arranged around the center of the rib groove 212. Compared with a single glue injection port, the impact force of the glue on the breathable membrane is further reduced.

[0078] Preferably, Fig.14 As shown, an air storage groove 120 is formed at the bottom of the upper mold 100, and the air storage groove 120 is located at the top of the cavity 400 and communicates with the cavity 400. The air storage groove 120 can be used to accommodate excess gas during the injection process. In conjunction with the bottom-up accumulation of the rubber material in this embodiment, the excess gas in the cavity 400 also rises along the flow of the rubber material and then enters the air storage groove 120. This design can prevent the excess gas from being free in the cavity 400 and affecting the molding of the product.

[0079] Specifically, the gas storage groove 120 is cylindrical and is located at the center of the top of the cavity 400 , so that the gas enters the gas storage groove 120 evenly when passing through the cavity 400 .

[0080] Preferably, the bottom surface area of ​​the air storage groove 120 is less than one-half of the top surface area of ​​the cavity 400. In some cases, part of the rubber may enter the air storage groove 120. The user needs to trim the rubber there and limit the bottom surface area of ​​the air storage groove 120 to a smaller range. This can reduce the impact of the rubber in the air storage groove 120 on the appearance of the battery rubber air valve product.

[0081] As a specific plan, Fig.14 As shown, the depth A1 of the air storage groove 120 is 3 mm to 4.5 mm, for example, A1 is 3.2 mm, 3.6 mm or 4 mm, and the diameter A2 of the air storage groove 120 is 2 mm to 3 mm, for example, A2 is 2.2 mm, 2.5 mm or 2.8 mm, etc. If the diameter A2 of the air storage groove 120 is too large, it will affect the aesthetics, and if the diameter A2 is too small, it will increase the difficulty for workers to clean the residue in the air storage groove 120. The depth A1 of the air storage groove 120 is matched with the diameter A2 of the air storage groove 120.

[0082] In summary, the battery rubber breathable valve produced by the mold provided in this application ensures the aesthetics of the colloid part while taking into account the performance of the breathable membrane, and the overall quality is greatly improved compared with the existing technology.

[0083] In this application, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0084] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery rubber vent valve forming mold, used to manufacture an umbrella-shaped battery rubber vent valve, characterized in that: include: An upper mold, a middle mold and a lower mold; the upper mold, the middle mold and the lower mold are used to form a mold cavity in combination; The lower mold is formed with an accommodating space, and the accommodating space is used to place the breathable membrane; The bottom of the middle mold is formed with an umbrella frame groove; the umbrella frame groove includes an outer edge ring groove and a plurality of umbrella rib grooves; the plurality of umbrella rib grooves are circumferentially arranged on the inner side of the outer edge ring groove; the umbrella rib grooves extend along the radial direction of the outer edge ring groove; The adjacent edges of the rib grooves and the inner side edges of the outer edge ring grooves together form an umbrella surface protrusion, and the top surface of the umbrella surface protrusion is formed with a fitting surface and a flow-stopping ridge; the flow-stopping ridge circumferentially surrounds the fitting surface, and the fitting surface is concave relative to the flow-stopping ridge; when the mold is closed, the fitting surface is flush with the top of the accommodating space, and the flow-stopping ridge extends into the accommodating space; An overflow cavity is formed between the middle mold and the lower mold, and the overflow cavity surrounds the mold cavity.

2. A battery rubber vent valve forming mold according to claim 1, characterized in that: The depth D1 of the overflow glue cavity is more than 4 times the width D2 of the overflow glue cavity; The depth D1 of the overflow glue cavity is 3.5 mm to 4 mm, and the width D2 of the overflow glue cavity is 0.3 mm to 0.45 mm.

3. A battery rubber vent valve forming mold according to claim 1, characterized in that: A pressurized surface is formed between the overflow glue cavity and the mold cavity, the depth of the pressurized surface is 0, and a plurality of drainage grooves are arranged on the pressurized surface. One end of the drainage groove is connected to the mold cavity, and the other end of the drainage groove is connected to the overflow glue cavity, so that the glue in the mold cavity flows from the drainage groove to the overflow glue cavity.

4. A battery rubber vent valve forming mold according to claim 3, characterized in that: All the drainage grooves are evenly arranged around the center circumference of the lower mold.

5. A battery rubber vent valve forming mold according to claim 3, characterized in that: The width Z1 of the drainage groove is 1 mm to 2 mm, and the depth Z2 of the drainage groove is 0.7 mm to 1.3 mm.

6. A battery rubber vent valve forming mold according to claim 1, characterized in that: The height L1 of the accommodating space is 0.5 mm to 0.6 mm, and the height L2 of the flow-stopping ridge is 0.35 mm to 0.4 mm.

7. A battery rubber vent valve forming mold according to claim 6, characterized in that: The top of the flow-stopping ridge is a plane, and the width L3 of the flow-stopping ridge is 0.3 mm to 0.5 mm.

8. The battery rubber vent valve forming mold according to claim 1, characterized in that: The middle mold and the lower mold jointly form a first tearing edge groove, the first tearing edge groove surrounds the mold cavity, and the first tearing edge groove is located between the overflow cavity and the mold cavity; an overflow gap is provided between the first tearing edge groove and the mold cavity; The height B1 of the overflow gap is 0.07 mm to 0.15 mm, and the width B2 of the overflow gap is 0.25 mm to 0.35 mm.

9. A battery rubber vent valve forming mold according to claim 8, characterized in that: A distance C between the overflow cavity and the first tear edge groove is 2.5 mm to 5 mm.

10. A battery rubber vent valve forming mold according to claim 8, characterized in that: A pressure surface is formed between the overflow glue cavity and the first tear edge groove, the depth of the pressure surface is 0, and a plurality of drainage grooves are arranged on the pressure surface. One end of the drainage groove is connected to the first tear edge groove, and the other end of the drainage groove is connected to the overflow glue cavity, so that the glue in the first tear edge groove flows from the drainage groove to the overflow glue cavity.

11. A battery rubber vent valve forming mold according to claim 1, characterized in that: It also includes a glue injection channel, which is connected to the mold cavity; The glue injection channel includes a glue inlet and a glue outlet, the glue inlet is located at the top of the upper mold, and the glue outlet is located at the bottom of the middle mold, so that the glue overflows the cavity from the middle position of the cavity.

12. A battery rubber vent valve forming mold according to claim 11, characterized in that: Each of the umbrella rib grooves is provided with a glue injection port, and all the glue injection ports are evenly arranged around the center of the umbrella rib groove.

13. A battery rubber vent valve forming mold according to claim 11, characterized in that: An air storage groove is also formed at the bottom of the upper mold, and the air storage groove is located at the top of the cavity and communicated with the cavity.

14. A battery rubber vent valve forming mold according to claim 13, characterized in that: The air storage groove is cylindrical and is located at the exact center of the top of the cavity. The bottom surface area of ​​the air storage groove is less than one half of the top surface area of ​​the cavity.

15. A battery rubber vent valve forming mold according to claim 14, characterized in that: The depth A1 of the air storage groove is 3 mm to 4 mm, and the diameter A2 of the air storage groove is 2 mm to 3 mm.

16. A battery rubber vent valve forming mold according to any one of claims 1 to 15, characterized in that: A mold core protruding upward is formed at the center of the lower mold, and the accommodating space is annular and surrounds the mold core.

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