Leakproof sealing structure for plastic food packaging containers

Abstract

The utility model provides a kind of leak-proof sealing structure of food plastic packaging container, belong to plastic packaging container technical field, including container body, container body top integrated mouth, annular mounting platform is arranged between mouth and container body, bottle cap is set on mouth, leak-proof assembly for preventing the leakage of contents in container body is arranged between bottle cap and annular mounting platform, leak-proof assembly includes liquid-collecting ring, leak-proof ring is arranged in liquid-collecting ring, sealing assembly for mouth sealing is arranged in bottle cap, sealing assembly includes sealing plug, sealing cover is arranged in sealing plug top, the utility model is set through leak-proof assembly, so that user can realize double protection of liquid leakage collection and bottle cap bottom leak-proof, improve the leak-proof comprehensiveness of the device, user can balance mouth sealing strength and opening convenience by sealing assembly, improve the use convenience of the device.

Description

Technical Field

[0001] This utility model belongs to the field of plastic packaging container technology, and more specifically, it relates to a leak-proof sealing structure for a food plastic packaging container. Background Technology

[0002] Food-grade plastic packaging containers serve as the core carriers in food production, storage, and distribution. They are widely used in packaging various liquid and semi-solid foods such as sauces, juices, soups, and jellies. Their sealing performance directly affects the freshness, hygiene, safety, and convenience of transportation and storage of food. To prevent food leakage during storage, transportation, or use, and to reduce food contamination, waste, or environmental impact, a leak-proof sealing structure for food-grade plastic packaging containers is required. This effectively ensures the sealing and safety of food packaging and meets the food industry's needs for packaging protection.

[0003] However, traditional leak-proof devices often rely solely on a single sealing ring or gasket for basic sealing, lacking dedicated leakage collection and leak-proof designs at the bottom of the cap. Without liquid collection and targeted leak-proof components, small amounts of leaked food can easily flow directly along the outer wall of the container, causing food waste, environmental pollution, and even contamination of other items, posing hygiene risks and inconvenience to users. In addition, traditional sealing structures are often simple interference fit structures, relying solely on their own elasticity to fit the bottle opening for a seal. This fails to balance sealing strength and ease of opening. If the seal is too tight, it is difficult for users to open; if the seal is too loose, leakage is likely to occur, resulting in a poor user experience and affecting the safety of food storage. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a leak-proof sealing structure for food plastic packaging containers, thereby solving the technical problems in the prior art where the traditional leak-proof structure is simple, easily leading to minor leakage, and the simple sealing structure is inconvenient to use.

[0005] The purpose and effect of the leak-proof sealing structure for a food plastic packaging container of this utility model are achieved by the following specific technical means: A leak-proof sealing structure for a food-grade plastic packaging container includes a container body with an integrally formed bottle mouth at the top. An annular mounting platform is provided between the bottle mouth and the container body. A bottle cap is fitted onto the bottle mouth. A leak-proof component to prevent leakage of the contents of the container body is provided between the bottle cap and the annular mounting platform. The leak-proof component includes a liquid collecting ring with a leak-proof ring inside it. A sealing component for sealing the bottle mouth is provided inside the bottle cap. The sealing component includes a sealing plug with a sealing cap on top.

[0006] Ideally, the annular mounting platform is integrally formed on the container body, the liquid collecting ring is sleeved on the bottle mouth and connected to the annular mounting platform by a snap fastener, the liquid collecting ring has a liquid collecting groove inside, the liquid collecting groove has a semi-open annular cross-section, the top of the liquid collecting ring does not contact the bottle cap and the leak-proof ring, and is lower than the bottom of the bottle cap.

[0007] Ideally, the leak-proof ring is fitted onto the bottle opening and its bottom is secured within the liquid collection ring. The leak-proof ring is hollow and can be made of rubber. The top of the leak-proof ring contacts the bottom of the bottle cap.

[0008] Ideally, the top of the sealing plug is integrally formed with a clip, which is engaged with the top of the bottle cap and contacts the bottle opening. The bottom of the sealing plug is integrally formed with a sealing head, which passes through the bottle opening and is disposed in the container body. The maximum diameter of the sealing head is greater than the minimum diameter of the bottle opening.

[0009] Ideally, the sealing plug has an air chamber, the clip has a through hole, the air chamber communicates with the through hole, and the top of the sealing cap is integrally formed with multiple sets of connectors, the bottoms of the multiple sets of connectors passing through the clip and being locked into the bottle cap.

[0010] Ideally, the sealing cap has an integrally formed plug inside, the bottom of the plug is engaged in the through hole and is interference-fitted with the through hole, the plug has multiple sets of anti-slip textures, and both the plug and the sealing plug can be made of rubber.

[0011] Ideally, the bottle cap is threaded to the bottle opening, and multiple sets of anti-slip patterns are formed on the periphery of the bottle cap, all of which are vertical lines.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model, through the coordinated design of the liquid collection ring and the leak-proof ring, enables users to achieve dual protection of leaked liquid collection and leak-proof bottom of the bottle cap, thus improving the overall leak-proof performance of the device. After the liquid collection ring is snapped and fixed to the annular mounting platform, and the leak-proof ring is snapped onto the liquid collection ring and attached to the bottom of the bottle cap, the user can collect a small amount of leaked contents through the liquid collection groove of the liquid collection ring, and block the leakage path at the bottom of the bottle cap through the leak-proof ring, thereby reducing leakage pollution to the environment or food waste. This eliminates the need for users to clean up leaks, and it can effectively prevent leakage even during transportation bumps or slight wear of the seal, improving the leak-proof reliability and cleanliness of the device.

[0013] 2. When using this device, the user can achieve a balance between the sealing strength and ease of opening by adjusting the fit between the air chamber of the sealing plug and the plug, thus improving the ease of use of the device. Then, through the interference fit between the plug and the through hole, the device can block the air chamber and maintain internal pressure when sealing, making the sealing plug less prone to deformation to enhance the sealing effect. When opening, the plug can be loosened to release air, allowing the sealing plug to deform and making it easier to unscrew the bottle cap. This provides the user with the benefits of reliable sealing and effortless opening, improving the practicality and user experience of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the assembled structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a front view structural diagram of the present invention; Figure 4 This is a cross-sectional structural diagram of the present invention.

[0015] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows: 11. Container body; 12. Bottle mouth; 13. Annular mounting platform; 14. Bottle cap; 21. Liquid collection ring; 22. Leak-proof ring; 23. Liquid collection tank; 31. Sealing plug; 32. Sealing cap; 33. Clip; 34. Sealing head; 35. Air chamber; 36. Through hole; 37. Connector; 38. Plug. Detailed Implementation

[0016] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0017] Example

[0018] like Figures 1 to 4 As shown, this utility model provides a leak-proof sealing structure for a plastic packaging container for food, including a container body 11, a bottle mouth 12 integrally formed on the top of the container body 11, an annular mounting platform 13 provided between the bottle mouth 12 and the container body 11, a bottle cap 14 fitted on the bottle mouth 12, and a leak-proof component to prevent leakage of the contents of the container body 11 provided between the bottle cap 14 and the annular mounting platform 13. The leak-proof component includes a liquid collecting ring 21, a leak-proof ring 22 provided inside the liquid collecting ring 21, and a sealing component for sealing the bottle mouth 12 provided inside the bottle cap 14. The sealing component includes a sealing plug 31, and a sealing cap 32 provided on the top of the sealing plug 31.

[0019] Specifically, the container body 11 is the core carrier for food storage, the one-piece molded bottle mouth 12 provides the installation base for the sealing component, ensuring the integrity of the structure and the stability of the connection, the annular mounting platform 13 provides positioning and fixing support for the leak-proof component, making the connection between the liquid collection ring 21 and the container body 11 more reliable, the bottle cap 14 achieves the sealing of the container by cooperating with the bottle mouth 12, the leak-proof component blocks the leakage path between the bottle cap 14 and the annular mounting platform 13 and collects the leaked liquid, and the sealing component achieves the sealing of the bottle mouth 12, reducing food leakage.

[0020] The annular mounting platform 13 is integrally formed on the container body 11. The liquid collection ring 21 is sleeved on the bottle mouth 12 and connected to the annular mounting platform 13 by a snap fastener. The liquid collection ring 21 has a liquid collection groove 23 inside. The cross-section of the liquid collection groove 23 is semi-open annular. The top of the liquid collection ring 21 does not contact the bottle cap 14 and the leak-proof ring 22, and is lower than the bottom of the bottle cap 14.

[0021] Specifically, the annular mounting platform 13 is integrally formed with the container body 11, eliminating connection gaps and reducing the risk of leakage. The liquid collection ring 21 is fixed to the annular mounting platform 13 by a snap-fit ​​connection, which is convenient to assemble and has a firm connection, making it easy to disassemble and clean. The semi-open annular liquid collection tank 23 has a high-efficiency liquid collection function, which can quickly collect leaked food. The top of the liquid collection ring 21 is lower than the bottom of the bottle cap 14 and does not contact other parts, which not only reserves space for the flow of leaked liquid, but also reduces assembly interference that affects the sealing effect, ensuring that the leaked liquid is collected in the liquid collection tank 23.

[0022] The leak-proof ring 22 is fitted onto the bottle mouth 12 and its bottom is locked inside the liquid collection ring 21. The leak-proof ring 22 is hollow and can be made of rubber. The top of the leak-proof ring 22 contacts the bottom of the bottle cap 14.

[0023] Specifically, the leak-proof ring 22 is fitted onto the bottle mouth 12 and locked inside the liquid collection ring 21 to achieve dual positioning and ensure stable position after installation. The hollow structure gives the leak-proof ring 22 good elastic deformation capability, and the rubber material further enhances its sealing adaptability. When the bottle cap 14 is locked, the top of the leak-proof ring 22 is in close contact with the bottom of the bottle cap 14. After being squeezed and deformed, it fills the gap between the bottle cap 14 and the bottle mouth 12, forming a sealing barrier at the bottom of the bottle cap 14, blocking the leakage path. It works with the liquid collection tank 23 to achieve dual protection of leak prevention and liquid collection.

[0024] The top of the sealing plug 31 is integrally formed with a clip 33, which is snapped onto the top of the bottle cap 14 and contacts the bottle mouth 12. The bottom of the sealing plug 31 is integrally formed with a sealing head 34, which passes through the bottle mouth 12 and is set inside the container body 11. The maximum diameter of the sealing head 34 is greater than the minimum diameter of the bottle mouth 12.

[0025] Specifically, the locking head 33 and the sealing plug 31 are integrally formed to enhance structural strength. The design of locking the sealing plug 31 onto the top of the bottle cap 14 enables the synchronous assembly and fixation of the sealing plug 31 and the bottle cap 14, ensuring a sealing position. The maximum diameter of the sealing head 34 is greater than the minimum diameter of the bottle mouth 12, forming an interference fit. When the sealing head 34 passes through the bottle mouth 12, it will undergo elastic deformation and fit tightly against the inner wall of the bottle mouth 12, achieving a seal on the bottle mouth 12 and preventing food from leaking from the inside of the bottle mouth 12. The interference fit design ensures the reliability and stability of the seal.

[0026] The sealing plug 31 has an air chamber 35 inside, and the clip 33 has a through hole 36 inside. The air chamber 35 is connected to the through hole 36. The bottom of the sealing cap 32 is integrally formed with multiple sets of connectors 37. The bottoms of the multiple sets of connectors 37 pass through the clip 33 and are clipped into the bottle cap 14.

[0027] Specifically, the opening of the air cavity 35 provides deformation space for the sealing plug 31, allowing it to adjust its shape according to pressure changes, balancing sealing strength and ease of opening. The through hole 36 serves as a communication channel between the air cavity 35 and the outside, enabling the adjustment of gas inflow and outflow. The connector 37 is integrally formed with the sealing cap 32 and is secured inside the bottle cap 14 by passing through the clip 33, thus achieving detachable fixing of the sealing cap 32 and the bottle cap 14. This ensures that the sealing cap 32 is installed securely and is easy to operate when opening, while also providing an installation base for the plug 38.

[0028] The sealing cap 32 has an integrally formed plug 38. The bottom of the plug 38 is fitted into the through hole 36 and is press-fitted with the through hole 36. The plug 38 has multiple anti-slip textures. Both the plug 38 and the sealing plug 31 can be made of rubber.

[0029] Specifically, the plug 38 and the sealing cap 32 are integrally molded, with a compact structure and a firm connection. The plug 38 and the through hole 36 are interference-fitted to ensure the air chamber 35 is airtight during sealing, preventing air from entering or leaving, keeping the sealing plug 31 in a stable shape, and enhancing the interference sealing effect. The elastic properties of the rubber material ensure the sealing performance of the interference fit and the ease of disassembly. The anti-slip texture on the plug 38 increases the friction for hand operation, making it easy for users to quickly open or close the plug 38 and improving ease of use.

[0030] The bottle cap 14 is threaded to the bottle mouth 12. Multiple anti-slip patterns are formed around the bottle cap 14, and all of the anti-slip patterns are vertical.

[0031] Specifically, the bottle cap 14 is threaded to the bottle mouth 12, and the axial locking force can be adjusted by rotation, so that the sealing component and the leak-proof component are fully squeezed and deformed, improving the sealing reliability. At the same time, the threaded connection has good repeat sealing performance, which is suitable for the repeated opening of food packaging. The vertical anti-slip design on the periphery increases the friction contact area between the hand and the bottle cap 14, reducing slippage when twisting, making it easier for the user to operate.

[0032] The specific usage and function of this embodiment are as follows: Before using the device, fill the container body 11 with the food to be packaged, ensuring that there is no obvious residue on the outside of the bottle mouth 12. During assembly, first, put the liquid collection ring 21 on the bottle mouth 12 and fix it to the annular mounting platform 13 with the buckle. Then, put the leak-proof ring 22 on the bottle mouth 12, so that the bottom is locked in the liquid collection ring 21. Then, put the sealing head 34 of the sealing plug 31 through the bottle mouth 12, and the clip 33 is locked in the top of the bottle cap 14. Fix the sealing cap 32 to the bottle cap 14 through the connector 37, so that the plug 38 is locked in the through hole 36 to seal the air chamber 35. Finally, rotate the bottle cap 14 and lock it to the bottle mouth 12 through the threaded connection, driving the leak-proof ring 22 and the sealing plug. 31. Extrusion deformation completes the overall seal. During use, the interference fit of the sealing head 34 and the air chamber 35 together ensure the core seal of the bottle mouth 12, preventing food leakage. If a small amount of leakage occurs, the leak-proof ring 22 will block the leakage path, allowing the leakage to flow into the collection groove 23 of the collection ring 21 along the gap for collection, reducing environmental pollution or food waste. When opening, first loosen the plug 38 through the anti-slip texture of the plug 38, allowing air to be discharged from the air chamber 35 through the through hole 36. The sealing plug 31 will deform, reducing the pressure of contact with the bottle mouth 12. Then, rotate the bottle cap 14 through the vertical anti-slip design on the side of the cap 14 to open it. The operation is labor-saving and convenient.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A leak-proof sealing structure for a food-grade plastic packaging container, comprising a container body (11), characterized in that: The container body (11) has an integrally formed bottle mouth (12) on the top. An annular mounting platform (13) is provided between the bottle mouth (12) and the container body (11). A bottle cap (14) is fitted on the bottle mouth (12). A leak-proof component to prevent leakage of the contents of the container body (11) is provided between the bottle cap (14) and the annular mounting platform (13). The leak-proof component includes a liquid collection ring (21) and a leak-proof ring (22) is provided inside the liquid collection ring (21). A sealing component for sealing the bottle mouth (12) is provided inside the bottle cap (14). The sealing component includes a sealing plug (31) and a sealing cap (32) is provided on the top of the sealing plug (31).

2. The leak-proof sealing structure for a food-grade plastic packaging container according to claim 1, characterized in that: The annular mounting platform (13) is integrally formed on the container body (11). The liquid collection ring (21) is sleeved on the bottle mouth (12) and connected to the annular mounting platform (13) by a snap fastener. A liquid collection groove (23) is provided inside the liquid collection ring (21). The cross-section of the liquid collection groove (23) is semi-open annular. The top of the liquid collection ring (21) does not contact the bottle cap (14) and the leak-proof ring (22) and is lower than the bottom of the bottle cap (14).

3. The leak-proof sealing structure for a food-grade plastic packaging container according to claim 2, characterized in that: The leak-proof ring (22) is fitted onto the bottle mouth (12) and its bottom is locked inside the liquid collection ring (21). The leak-proof ring (22) is hollow and can be made of rubber. The top of the leak-proof ring (22) is in contact with the bottom of the bottle cap (14).

4. The leak-proof sealing structure for a food-grade plastic packaging container according to claim 1, characterized in that: The top of the sealing plug (31) is integrally formed with a clip (33), which is clipped onto the top of the bottle cap (14) and contacts the bottle mouth (12). The bottom of the sealing plug (31) is integrally formed with a sealing head (34), which passes through the bottle mouth (12) and is located inside the container body (11). The maximum diameter of the sealing head (34) is greater than the minimum diameter of the bottle mouth (12).

5. The leak-proof sealing structure for a food-grade plastic packaging container according to claim 4, characterized in that: An air chamber (35) is provided inside the sealing plug (31), and a through hole (36) is provided inside the clamp (33). The air chamber (35) is connected to the through hole (36). The bottom of the sealing cap (32) is integrally formed with multiple sets of connectors (37). The bottoms of the multiple sets of connectors (37) pass through the clamp (33) and are clamped inside the bottle cap (14).

6. The leak-proof sealing structure for a food-grade plastic packaging container according to claim 5, characterized in that: The sealing cap (32) has an integrally formed plug (38). The bottom of the plug (38) is fitted into the through hole (36) and is press-fitted with the through hole (36). The plug (38) has multiple anti-slip textures. Both the plug (38) and the sealing plug (31) can be made of rubber.

7. The leak-proof sealing structure for a food-grade plastic packaging container according to claim 1, characterized in that: The bottle cap (14) is threaded to the bottle mouth (12), and multiple anti-slip patterns are formed on the periphery of the bottle cap (14), all of which are vertical lines.

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