Bottle opening threaded insert, sealing device and metal aluminum bottle

Abstract

The utility model relates to a bottle opening threaded insert, a sealing device and a metal aluminum bottle, and belongs to the technical field of aluminum bottle sealing structures. The bottle opening threaded insert comprises a sleeve body, an abutting end, a connecting end, a connecting end, a connecting end and a connecting end, and the abutting end is arranged at the upper end of the sleeve body and used for being matched with a bottle opening turned edge in an abutting mode. The retaining conical section is arranged at the lower end of the inner hole of the sleeve body, is in an outward-expanding conical sleeve shape and is used for being matched with the neck expanding section of the bottleneck; the threaded section is formed on the periphery of the sleeve body and used for being connected with a matched bottle cap; and at least two groups of clamping and collecting grooves are arranged, each group comprises two clamping and collecting grooves, and the two clamping and collecting grooves are inclined grooves and are opposite in grooving direction. According to the utility model, on one hand, up-and-down pushing acting force is formed through the abutting end and the retaining conical section, so that the stability of the insert in the axial direction is ensured; and on the other hand, holding contraction force is applied to the bottle neck through the clamping and collecting groove formed in the periphery in the insert assembly state, so that interference fit is kept between the insert and the bottle neck, and stable circumferential positioning is achieved.

Description

Technical Field

[0001] The utility model relates to a bottle mouth thread insert, a sealing device and an aluminum bottle, and belongs to the technical field of aluminum bottle sealing structures. Background Art

[0002] Aluminum bottles are packaging containers formed by aluminum ingots through multiple neck shrinking and stamping processes. The sealing of aluminum bottles is generally done by rolling threads at the mouth of the bottle. Since the overall wall thickness of aluminum bottles is relatively thin, when processing threads at the mouth of the bottle, the mouth of the bottle often breaks, causing the entire aluminum bottle to become scrap. Not only does it waste materials and place high requirements on the molding mold, but it also undoubtedly increases the production cost required to produce aluminum bottles. In addition, aluminum bottles used for food packaging will be coated with a protective coating on the surface of the aluminum material before processing. The coating is prone to wear when processing threads, and the wear resistance of repeated screwing of the cap is not as good as that of plastic threads. These shortcomings may cause the coating to peel off when using aluminum bottles, affecting the risk of food safety.

[0003] Authorization announcement number CN213110514U discloses an aluminum bottle with an external threaded insert. In order to achieve a relatively fixed position between the external threaded insert and the bottle mouth, an axial limiter and a circumferential limiter are provided between the threaded insert and the bottle mouth, wherein the axial limit is achieved by a curling structure that folds the bottle mouth toward the outside, and the circumferential limit is achieved by at least one positioning protrusion that extends toward the inner wall of the plastic insert and is provided on the outer peripheral surface of the bottle mouth. Obviously, this circumferential limit method increases the processing difficulty of the bottle body and the plastic insert, and when the two are assembled, the plastic insert needs to be heated. Although it can solve the assembly problem, it will also cause the plastic insert to deform, affecting its stability in subsequent use, and it is difficult to achieve a substantial positioning effect. Utility Model Content

[0004] Aiming at the deficiencies in the prior art, the utility model provides a bottle mouth thread insert, a sealing device and a metal aluminum bottle.

[0005] In the first aspect, the utility model provides a bottle mouth thread insert, which is embedded in the neck of an aluminum bottle near the bottle mouth, and is used to fit and engage with a bottle cap to implement the closure of the bottle mouth. The feature of the bottle mouth thread insert is that it includes a sleeve body and:

[0006] The abutment end is configured at the upper end of the sleeve body to abut and fit with the rolled edge of the bottle mouth;

[0007] The stop cone section is arranged at the lower end of the inner hole of the sleeve body and is in the shape of an outwardly expanding cone sleeve, so as to adapt to the expanded neck section of the bottleneck;

[0008] A threaded section, formed on the outer periphery of the sleeve body and located below the abutment end, for connecting with a matching bottle cap;

[0009] The clamping and converging grooves are configured in at least two groups, each group has two clamping and converging grooves, and the two clamping and converging grooves are obliquely slotted and have opposite slotting directions.

[0010] Furthermore, the abutting end is an L-shaped step arranged at the upper end of the sleeve body, the vertical section of which is embedded in the groove of the bottle mouth curling and contacts the inner side surface thereof, and the horizontal section of which is pressed and abutted against the bottle mouth curling.

[0011] Furthermore, the clamping and converging groove starts from the abutting end of the sleeve body and ends below the threaded section.

[0012] Furthermore, the bottle mouth thread insert is a plastic part.

[0013] In the second aspect, the utility model discloses a closing device, which is used to seal the mouth of a metal aluminum bottle, including a bottle neck and a bottle mouth curling structure roll-formed at the bottle mouth, characterized in that the bottle neck is surrounded by a bottle mouth thread insert as described above.

[0014] In a third aspect, the utility model provides a metal aluminum bottle, comprising a neck of a bottle and a bottle mouth curling structure roll-formed at the bottle mouth, characterized in that the bottle mouth thread insert as described above is provided around the neck of the bottle.

[0015] The bottle mouth threaded insert of the utility model realizes the fixation of the relative position between the insert and the bottleneck through various integrally formed functional structures. On the one hand, the top of the insert is hooked and connected with the bottle mouth roll structure by adopting the abutting end of the L-shaped step, and the bottom of the insert is pushed and adapted with the expanded neck section of the bottleneck through the stop cone section, and the upper and lower pushing forces ensure the axial stability of the insert; on the other hand, the clamping and restraining grooves opened on the outer periphery of the insert can apply a clamping and contracting force to the bottleneck when the insert is assembled, so that the insert and the bottleneck maintain an interference fit, thereby achieving more stable circumferential positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : A three-dimensional structural diagram of the bottle mouth thread insert of Example 1;

[0017] Figure 2 : Figure 1 A top view of

[0018] Figure 3 : Figure 2 AA section view;

[0019] Figure 4 : Front view of bottle mouth thread insert;

[0020] Figure 5 : A schematic diagram of the structure of the bottle mouth sealing device of the second embodiment;

[0021] In the figure, 1. sleeve body, 11. abutment end, 12. stop cone section, 13. thread section, 14. clamping convergence groove, 10. thread insert, 20. bottleneck, 30. bottle mouth curling structure. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings.

[0023] Embodiment 1

[0024] A bottle mouth thread insert is nested in the bottleneck of an aluminum bottle near the bottle mouth to fit with a bottle cap to close the bottle mouth. The bottle mouth thread insert is a plastic part, including a sleeve body 1. The sleeve body 1 is sleeved on the bottleneck of the aluminum bottle through an inner hole in the middle to form a sleeve connection between the two. The sleeve body 1 has an abutment end 11, a backstop cone section 12, a threaded section 13 and a clamping convergence groove 14, wherein the abutment end 11 is configured as an L-shaped step on the upper end surface of the sleeve body 1, the vertical section of which is embedded in the groove of the bottle mouth curling and contacts with its inner side surface, and the horizontal section is pressed and abutted with the bottle mouth curling, the bottle mouth curling is an inverted L-shape, and when pressed downward, the two are in a mutually gripping hook-connected structure; the backstop cone section 12 is configured at the inner hole at the lower end of the sleeve body 1, and is in an outward-expanding cone sleeve shape, which is used to adapt to the expanded neck section of the bottleneck of the aluminum bottle, and through the cooperation between the backstop cone section 12 and the expanded neck section, the sleeve body 1 is subjected to downward resistance to maintain Their relative positions are fixed; the threaded section 13 is formed on the outer periphery of the sleeve body 1 and is located below the abutment end 11, so as to connect with the matching bottle cap; there are four clamping and converging grooves 14, the upper end of which starts from the abutment end of the sleeve body and the lower end ends at the bottom of the threaded section, and the four grooves are longitudinally opened on the outer periphery of the sleeve body 1 in groups of two, wherein the clamping and converging grooves 14 in a group have a predetermined spacing, and the grooves are opened in opposite directions and have a certain slope. When the sleeve body 1 is installed on the bottleneck, the two clamping and converging grooves 14 in opposite directions generate a mutual clamping and contraction force, so that the sleeve body 1 is firmly and stably assembled on the outer periphery of the bottleneck.

[0025] Embodiment 2

[0026] A bottle mouth closing device for aluminum bottles, such as Figure 5As shown, it includes a bottleneck 20, a bottle mouth curling structure 30 roll-formed at the bottle mouth, and a threaded insert 10 sleeved on the outer periphery of the bottleneck 20, the threaded insert 10 has an abutting end 11 on the top and is abutted and matched with the bottle mouth curling structure 30 through the abutting end 11, the threaded insert 10 has a back-stop cone section 12 on the bottom and is pushed and matched with the expanded neck portion below the bottleneck 20 through the back-stop cone section 12, the outer periphery of the threaded insert 10 is provided with a threaded section 13 for matching with the inner thread of the bottle cap, and the outer periphery of the threaded insert 10 has four longitudinally provided clamping and convergence grooves 14, the four clamping and converging grooves 14 are matched in pairs to form a group, and there is a predetermined spacing between the two clamping and converging grooves 14 in a group, and the groove opening directions are opposite and have a certain slope. When the threaded insert 10 is an unassembled independent component, the clamping and converging grooves 14 are in a static free state; when the threaded insert 10 is installed on the bottleneck 20, the clamping and converging grooves 14 in a group will generate a mutual clamping and contraction force, which makes the clamping and converging grooves 14 clamp each other and finally act on the bottleneck 20, so that the threaded insert 10 is firmly and stably assembled on the outside of the bottleneck 20.

[0027] Embodiment 3

[0028] A metal aluminum bottle comprises a bottleneck, a bottle mouth and a bottle cap, wherein the bottleneck is sleeved with the bottle mouth thread insert described in Example 1, and the bottle cap is threadably connected to the bottle mouth thread insert to achieve sealing of the bottle mouth of the metal aluminum bottle.

[0029] The present invention is not limited to the above-discussed implementations. The above description of the specific implementations is intended to describe and illustrate the technical solutions involved in the present invention. Obvious changes, substitutions or combinations based on the teachings of the present invention should also be considered to fall within the scope of protection of the present invention. The above specific implementations are used to reveal the best implementation method of the present invention, so that ordinary technicians in the field can apply various implementations and various alternatives of the present invention to achieve the purpose of the present invention.

Claims

1. A bottle mouth thread insert, which is embedded in the neck of an aluminum bottle near the bottle mouth, and is used to fit with a bottle cap to seal the bottle mouth, characterized in that: The bottle mouth thread insert comprises a sleeve body and: The abutment end is configured at the upper end of the sleeve body to abut and fit with the rolled edge of the bottle mouth; The stop cone section is arranged at the lower end of the inner hole of the sleeve body and is in the shape of an outwardly expanding cone sleeve, so as to adapt to the expanded neck section of the bottleneck; A threaded section, formed on the outer periphery of the sleeve body and located below the abutment end, for connecting with a matching bottle cap; The clamping and converging grooves are configured in at least two groups, each group has two clamping and converging grooves, and the two clamping and converging grooves are obliquely slotted and have opposite slotting directions.

2. A bottle thread insert as claimed in claim 1, characterized in that: The abutting end is an L-shaped step arranged at the upper end of the sleeve body, the vertical section of which is embedded in the groove of the bottle mouth curling and contacts the inner side surface thereof, and the horizontal section of which is pressed and abutted against the bottle mouth curling.

3. A bottle thread insert as claimed in claim 1, characterized in that: The clamping and converging groove starts from the abutting end of the sleeve body and ends below the threaded section.

4. A bottle thread insert as claimed in claim 1, characterized in that: The bottle mouth thread insert is a plastic part.

5. A closure device, comprising a bottle neck and a bottle mouth curling structure roll-formed at the bottle mouth, characterized in that: The neck of the bottle is sheathed with the bottle mouth thread insert according to any one of claims 1-4.

6. A metal aluminum bottle, comprising a neck and a bottle mouth curling structure roll-formed at the bottle mouth, characterized in that: The neck of the bottle is sheathed with the bottle mouth thread insert according to any one of claims 1-4.

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