Novel anti-pulling-off double-material injection molding type white spirit anti-fake bottle cap inner cap

Abstract

The utility model relates to an inner cap, in particular to a novel anti-pulling-off double-material injection molding type white spirit anti-fake bottle cap inner cap, and solves the design problem of preventing the inner cap from being pulled out by mistake. The inner cover comprises an inner buckle body and an outer cover body which are integrally formed through double-material injection molding, connected clamping portions are arranged between the inner buckle body and the outer cover body, the clamping portions are in a step-shaped distribution path, the number of the clamping portions is at least two in the circumferential direction, a through sealing cavity is formed in the middle of the outer cover body, and the sealing cavity is communicated with the inner buckle body and the outer cover body. The inner buckle body is provided with a protruding part extending into the sealing cavity of the outer cover body, and a gap is formed between the protruding part and the cavity wall of the sealing cavity. The pulling force of the bottle cap is greatly improved, so that the problem that the inner cap is pulled off from other components (on the inner sleeve and the upper cap) of the bottle cap under the physical force of the bottle cap is solved; the anti-counterfeiting function of the bottle cap product is greatly improved; compared with other split type anti-counterfeiting inner covers, the production cost is reduced, the production procedures are reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to an inner cap, and more particularly to a novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor. Background Technology

[0002] A typical baijiu (Chinese liquor) bottle cap is assembled from components such as an upper cap, lower sleeve, inner sleeve, inner stopper, and inner cap. The inner cap is a component in the baijiu anti-counterfeiting bottle cap structure that comes into contact with the liquor, and its main function is to connect the other components. Currently, inner caps on the market are generally made of food-grade plastic particles such as PP through one-piece injection molding. The inner cap has internal threads and a sealing ring. After the inner cap and other bottle cap components, such as the inner sleeve, are tightened, it seals the liquor and connects other components (such as the upper cap). The existing technical shortcomings are mainly as follows:

[0003] The inner cap is easily detached by physical means (e.g., after the top cap and inner cap are combined, the top cap can be physically detached upwards), which reduces the anti-counterfeiting properties of the bottle cap; it is not heat-resistant, and the inner cap can be easily detached from the complete bottle cap by boiling or heating, which also reduces the anti-counterfeiting properties; if ultra-high strength and ultra-high temperature resistant materials are used for production, the materials do not meet food hygiene requirements, thus limiting the wide range of materials that can be used. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor, the inner cap comprising an inner buckle body and an outer cover body integrally molded by double-material injection molding, the inner buckle body and the outer cover body having a connecting locking part, the locking part having a stepped distribution path, the locking part having at least two along the circumference, the outer cover body having a through-sealed chamber in the middle, the inner buckle body having a protruding part extending into the sealed chamber of the outer cover body, the protruding part having a gap between it and the cavity wall of the sealed chamber.

[0006] Preferably, the outer cover is a circular ring structure, the inner buckle is a circular basin structure, and the locking part has four evenly spaced positions along the circumference.

[0007] Preferably, the inner buckle body has a recessed balance groove on the back side of the protrusion.

[0008] Preferably, the wall of the sealed chamber is provided with internal threads.

[0009] Preferably, the locking part is located on the outer wall of the inner buckle, and the inner wall of the outer cover is provided with a locking groove for engaging the locking part.

[0010] Preferably, the outer cover and the inner buckle are bidirectionally limited in the axial direction.

[0011] Preferably, the protrusion is further provided with an annular groove at the top, and the protrusion forms a contact step surface on the wall of the annular groove.

[0012] Preferably, the bottom of the outer wall of the outer cover is provided with a protruding retaining ring.

[0013] Preferably, the outer wall of the outer cover is provided with grid strips evenly spaced along the circumference.

[0014] Preferably, the inner buckle body is injection molded from PP plastic, and the outer cover body is injection molded from nylon mixed with glass fiber, PC plastic, or PBT.

[0015] The beneficial effects of this utility model are as follows: The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap provided by this utility model greatly improves the pull force of the bottle cap, thereby solving the problem of the inner cap being pulled off from other components of the bottle cap (inner sleeve, upper cap) under physical force; it greatly improves the anti-counterfeiting function of the bottle cap product, preventing malicious damage to the product and malicious claims in the market; it greatly enhances the adaptability of the bottle cap product under high temperature conditions, ensuring that the bottle cap product has higher high temperature resistance, preventing malicious high temperature damage, thereby enhancing the anti-counterfeiting function of the product; compared with other split anti-counterfeiting inner caps, it reduces production costs, reduces production processes, and improves production efficiency. Attached Figure Description

[0016] Figure 1 This is an exploded top view of the structure of this utility model.

[0017] Figure 2 This is an exploded view of the structure from below, illustrating the application of this utility model.

[0018] Figure 3 This is a top-view exploded view of the inner cover of this utility model.

[0019] Figure 4 This is a top-view diagram of the exploded inner cover structure of this utility model. Detailed Implementation

[0020] like Figures 1-4As shown, a novel anti-removal dual-material injection-molded anti-counterfeiting bottle cap for liquor is disclosed. The inner cap comprises an inner buckle body 1 and an outer cover body 2, integrally molded from two materials. A locking portion 3 connects the inner buckle body 1 and the outer cover body 2, with a stepped distribution path. At least two locking portions 3 are provided circumferentially. The outer cover body 2 has a through-sealed chamber 4 in its center. The inner buckle body 1 has a protruding portion 5 extending into the sealed chamber 4 of the outer cover body 2, with a gap between the protruding portion 5 and the wall of the sealed chamber 4. A dual-color / dual-material injection molding process is employed. Through a dual-color mold structure design, the inner cap is divided into upper and lower parts, each injection molded using two different raw materials. This technology facilitates rapid injection molding of the product on the injection molding machine while maintaining the inner cap as a single unit; it reduces subsequent assembly steps, thus improving production efficiency. Simultaneously achieving dual anti-counterfeiting functions: First, the lower part is molded from water-resistant and high-temperature-resistant materials, possessing stronger anti-deformation force, ensuring it cannot be easily pulled off after engaging with other bottle cap components, thus fulfilling the anti-pull-out anti-counterfeiting requirement; second, the structural design of the joint surfaces and points of the two different raw materials through the mold ensures that the torque, deformation force, and pull-out force performance requirements of normal production and assembly of the inner cap are met. The design of the locking part 3 involves staggered contact, providing greater resistance in a specified direction, preventing it from being easily pulled off or detached. To ensure balanced force distribution, a ring or circumferential layout is adopted to avoid excessive local deformation that could cause the entire unit to loosen. The design of the protruding part 5 not only directly contacts the wine but also engages with other parts of the bottle cap to strengthen the local structural strength, thereby improving the sealing effect. The gap between the protruding part 5 and the cavity wall of the sealing chamber 4 is for other caps to nest, enhancing sealing and connection. This arrangement is based on a common structural layout and will not be elaborated or limited further here.

[0021] The outer cover 2 has a circular ring structure, the inner buckle 1 has a circular basin structure, and the locking part 3 has four evenly spaced parts along the circumference. This structure is stable and reliable, meeting design requirements. The inner buckle 1 has a recessed balance groove 6 on the back of the protrusion 5, which balances the thickness of each part and helps to equalize stress. The cavity wall of the sealed chamber 4 has internal threads, which facilitates threaded connection, strengthens the fixation of the outer cover 2, and prevents it from being easily pulled out.

[0022] The locking part 3 is located on the outer wall of the inner buckle body 1, and the inner wall of the outer cover body 2 is provided with a locking groove 7 for engaging the locking part 3. This is the specific form of the locking part 3. The locking groove 7 is only open on one radial side, allowing the locking part 3 to be locked and limited axially in the outer cover body 2 or the inner buckle body 1 after injection molding. The outer cover body 2 and the inner buckle body 1 are bidirectionally limited axially, ensuring that the structure remains relatively stable even when subjected to pulling or heating. The protruding part 5 also has an annular groove 8 at its top, and the protruding part 5 forms a contact step surface 9 on the wall of the annular groove 8, thus creating a relatively tortuous gap, achieving a labyrinth seal effect to some extent. The bottom of the outer wall of the outer cover body 2 is provided with a protruding retaining ring 10, which allows the outer cap and other components to be locked and limited axially, enhancing the overall integrity of the entire cap.

[0023] The outer casing 2 has circumferentially spaced grid strips 11 on its outer wall to enhance structural strength, providing strong impact and damage resistance. It can also be used in conjunction with other grid structures to enhance connection tightness. The inner buckle 1 is injection molded from PP plastic (polypropylene), and the outer casing 2 is injection molded from nylon mixed with glass fiber (i.e., glass fiber modified reinforced nylon), PC plastic (polycarbonate), or PBT (polybutylene terephthalate). These materials are common and possess characteristics suitable for design and production; they are merely examples and not the only limitations. Injection molding achieves a tight connection, and other operations can be performed as needed.

[0024] It's worth noting that the inner cap remains a complete component through two-color / two-material injection molding, eliminating the need for subsequent assembly processes. The upper part, which contacts the food solution, is made of food-grade plastic, meeting food standards. The lower part is made of high-temperature resistant, high-strength materials, significantly enhancing its strength when combined with other cap components, ensuring the inner cap is firmly secured to the rest of the assembly and greatly increasing tensile strength. In terms of anti-counterfeiting features, the lower half of the inner cap securely fastens the cap assembly (inner sleeve and upper cap), making it difficult to remove.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the basic principles, main features, and advantages of this utility model have been shown and described above, which should be understood by those skilled in the art.

Claims

1. A novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor, characterized in that, The inner cover includes an inner buckle body and an outer cover body integrally molded by two-material injection molding. The inner buckle body and the outer cover body have a connecting locking part. The locking part has a stepped distribution path and at least two locking parts are provided along the circumference. The outer cover body has a through-sealed chamber in the middle. The inner buckle body has a protrusion extending into the sealed chamber of the outer cover body. There is a gap between the protrusion and the cavity wall of the sealed chamber.

2. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 1, characterized in that, The outer cover has a circular ring structure, the inner buckle has a circular basin structure, and the locking part has four evenly spaced parts along the circumference.

3. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 1 or 2, characterized in that, The inner buckle has a recessed balance groove on the back of the protrusion.

4. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 3, characterized in that, The sealed chamber wall is provided with internal threads.

5. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 1, characterized in that, The locking part is located on the outer wall of the inner buckle, and the inner wall of the outer cover is provided with a locking groove for engaging the locking part.

6. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 2, characterized in that, The outer cover and the inner buckle are bidirectionally limited in the axial direction.

7. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 3, characterized in that, The protruding part is also provided with an annular groove at the top, and the protruding part forms a contact step surface on the wall of the annular groove.

8. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 1, characterized in that, The bottom of the outer wall of the outer cover is provided with a protruding retaining ring.

9. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 1, characterized in that, The outer wall of the outer cover is provided with grid strips evenly spaced along the circumference.

10. The novel anti-removal double-material injection-molded anti-counterfeiting bottle cap for liquor as described in claim 1, characterized in that, The inner buckle body is joined by injection molding of PP plastic, and the outer cover body is joined by injection molding of nylon mixed with glass fiber, PC plastic, or PBT.

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