Metal easy-to-open cover with high compressive strength

Abstract

The utility model discloses a metal easy-open cover with high compression strength, which comprises a cover body and a pull ring riveted on the upper end face of the cover body, the periphery of the upper end face of the cover body is provided with a scribed line and a scribed line protection reinforcing rib sunken towards the lower end face of the cover body, and a reinforcing expansion ring formed downwards is radially arranged from the center of the cover body to the periphery in a surrounding manner. By improving the cover body structure of the easy-to-open cover, under the triple strengthening action of the scribed line protection reinforcing rib, the crescent reinforcing rib and the step-shaped reinforcing expansion ring, the pressure resistance level of the easy-to-open cover can be effectively improved, so that the requirement of high pressure resistance of special contents is met, and meanwhile, under the condition of the same pressure resistance requirement, the material thickness can be reduced, and the production cost can be reduced. Therefore, the purpose of reducing the cost is achieved, and the safety of the zip-top can product in the packaging, transporting and storing processes is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of easy-open covers, and more particularly to a metal easy-open cover with high pressure resistance. Background Art

[0002] As one of the main packaging forms in my country, metal packaging has the characteristics of high strength, easy opening, environmental protection and recyclability compared to traditional plastic and glass containers. For some foods or beverages with special pressure resistance requirements, metal packaging is still the most suitable choice.

[0003] With the development of technology, the thinning of materials and the reduction of consumables of a single lid are still the research goals of major easy-open lid manufacturers. The pressure resistance of a lid is mainly composed of three parts: material strength, material thickness and structural strength of the easy-open lid. The current mainstream idea is mainly to improve the strength of the material to compensate for the pressure loss caused by the reduction of material thickness, while there is little research on how to improve the pressure resistance of the product by improving the structural strength.

[0004] Although some manufacturers have studied the structural design of the countersunk head and shoulder of the easy-open end and used them in beverage packaging, the concept of improving the cover strength of the easy-open end, reducing the damage to the score line caused by structural deformation, and thus improving the pressure resistance of the easy-open end has not yet been fully developed.

[0005] Therefore, how to provide a metal easy-open lid with improved compressive strength by changing the lid surface structure is a problem that those skilled in the art need to solve urgently. Utility Model Content

[0006] In view of this, the utility model provides a metal easy-open cover with high pressure resistance, which can effectively improve the pressure resistance level of the easy-open cover, thereby meeting the high pressure resistance requirements of special contents.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a metal easy-open cover with high compressive strength, comprising: a cover body and a pull ring riveted to the upper end surface of the cover body, the outer periphery of the upper end surface of the cover body is provided with a score line and a score line protection reinforcement rib recessed toward the lower end surface of the cover body, and the score line protection reinforcement rib is arranged around the center of the cover body so that the score line is subjected to uniform force at various locations.

[0009] Preferably, in the above-mentioned metal easy-open cover with high pressure resistance, the cover body is radially surrounded by a downwardly formed reinforcing expansion ring from the center to the outer periphery, and the reinforcing expansion ring is a stepped structure from the outermost circle to the innermost circle, and the depth of the upper end face and the lower end face of the cover body is gradually increased from the outermost circle to the innermost circle, so as to improve the pressure resistance of the cover body.

[0010] Preferably, in the above-mentioned metal easy-open lid with high compressive strength, the score line protection reinforcement rib is arranged between the score line and the outermost circle of the reinforcement expansion circle, and the score line protection reinforcement rib is formed equidistantly from the score line.

[0011] Preferably, in the above-mentioned metal easy-open lid with high compressive strength, the upper end surface of the lid body is provided with crescent-shaped reinforcing ribs which are radially symmetrical with respect to the pull ring and the lid body.

[0012] Preferably, in the above-mentioned metal easy-open cover with high compressive strength, one end of the pull ring close to the center of the cover body is a pulling end, and the other end is a pressing end. A rivet is provided between the pulling end and the pressing end, and the pull ring is riveted to the cover body through the rivet.

[0013] It can be seen from the above technical scheme that compared with the prior art, the utility model discloses a metal easy-open lid with high compressive strength. Under the triple reinforcement of the scoreline protection reinforcement ribs, the crescent-shaped reinforcement ribs and the stepped reinforcement expansion ring, the pressure resistance level of the easy-open lid can be effectively improved, thereby meeting the high pressure resistance requirements of special contents. At the same time, under the same pressure resistance requirements, the material thickness can be reduced, thereby achieving the purpose of reducing costs and effectively ensuring the safety of canned products during packaging, transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 The utility model is a schematic diagram of the top view of the metal easy-open cover with high compressive strength.

[0016] Figure 2 The utility model is a side sectional view of a metal easy-open cover with high compressive strength.

[0017] Figure 3 It is a partial schematic diagram of the engraved lines and engraved line protection reinforcement ribs of the utility model.

[0018] Figure 4 It is a partial schematic diagram of the reinforced expansion ring of the utility model.

[0019] In the figure, 1-cover body, 11-marked line, 12-marked line protection reinforcement rib, 13-crescent-shaped reinforcement rib, 14-rivet, 15-reinforced expansion ring, 151-first expansion ring, 152-second expansion ring, 153-third expansion ring, 154-fourth expansion ring, 155-fifth expansion ring, 2-pull ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Please see attached Figure 1-4 , which is a metal easy-open cover with high compressive strength disclosed by the utility model.

[0022] The metal easy-open lid with high compressive strength provided by the utility model mainly comprises a lid body 1 and a pull ring 2. The inner and outer surfaces of the lid body are covered with a coating for protection. The lid body molding design mainly comprises several components such as a score line 11, a score line protection reinforcement rib 12, a crescent-shaped reinforcement rib 13, a rivet 14 and a stepped reinforcement expansion ring 15.

[0023] like Figure 1 As shown, one end of the pull ring 2 close to the center of the cover body 1 is a pulling end, and the other end is a pressing end, and a rivet 14 is provided between the pulling end and the pressing end, and the pull ring 2 is riveted to the cover body 1 through the rivet 14. A circular score line 11 is provided on the surface of the cover body, which can be used to tear the cover surface under the action of the pull ring 2, with the rivet 14 as the center point of the lever force, to achieve the opening effect.

[0024] like Figure 1-3 As shown, because the cover 1 is prone to local weak points at the score line 11, when the cover 1 is inflated, the local instability of the structure will aggravate the non-uniform deformation of the cover surface, causing the local cover surface to bulge, thereby aggravating the damage to the score line, causing the cover 1 to be damaged and leak without being opened. Therefore, the utility model is provided with a full circle of score line protection reinforcement ribs 12 formed downward near the score line 11. The score line protection reinforcement ribs 12 are arranged around the center of the cover 1 and are formed equidistantly from the score line 11 to protect the score line 11 structure. The score line protection reinforcement ribs 12 are complete in structure. When the cover 1 is subjected to internal pressure, they can better eliminate the non-uniform force generated by the protrusion of the cover surface and evenly transfer the force to the score line 11, thereby improving the safety of the score line 11 and greatly improving the pressure resistance level of the easy-to-open cover.

[0025] It should be noted that if Figure 1 As shown, the upper end surface of the cover body 1 is provided with a crescent-shaped reinforcement rib 13 which is radially symmetrical with respect to the pull ring 2 and the cover body 1. The crescent-shaped reinforcement rib 13 not only serves to collect the material, but also forms a reinforcing effect of the combined score line protection reinforcement rib 12, the rivet 14 and the crescent-shaped reinforcement rib 13 in the local area, thereby further improving the pressure resistance level of the easy-open cover.

[0026] like Figure 1-2 As shown in Figure 4, a stepped reinforcing expansion ring 15 is designed at the center of the cover body, which is radially arranged from the center of the cover body 1 to the outer periphery. Its main feature is the stepped structure design formed downward. The specific number of rings is designed according to the size of the cover surface, specifically the first expansion ring 151, the second expansion ring 152... the Nth expansion ring. The depth is gradually deepened from the first expansion ring 151 to the Nth expansion ring, so that the depth of the upper end face and the lower end face of the cover body 1 gradually deepens. When it reaches the central expansion ring (i.e. the Nth expansion ring), the forming depth is further deepened to improve the compressive strength of the cover body 1, especially the impact pressure of the contents in the can body on the cover body 1. It should be noted that the reinforcing expansion ring 15 shrinks and flattens the material after the cover surface is stretched and formed, and while maintaining the tension of the cover surface, it can also deeply strengthen the deformation resistance of the cover surface to prevent the cracking of the score line 11 caused by the deformation of the cover surface when it is subjected to the internal pressure of the can.

[0027] It should be noted that the material of the cover body in the present invention is suitable for conventional metals, such as tinplate or aluminum, which is mainly to meet the requirements of high pressure resistance performance of the contents and reduce the thickness of the cover body material.

[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A metal easy-open lid with high compressive strength, characterized in that: The invention comprises a cover body (1) and a pull ring (2) riveted to the upper end surface of the cover body (1); the outer periphery of the upper end surface of the cover body (1) is provided with a score line (11) and a score line protection reinforcement rib (12) recessed toward the lower end surface of the cover body (1); the score line protection reinforcement rib (12) is arranged around the center of the cover body (1) so that the score line (11) is subjected to uniform force at all locations.

2. The metal easy-open lid with high compressive strength according to claim 1, characterized in that: The cover body (1) is provided with a plurality of downwardly formed reinforcing expansion rings (15) radially extending from the center to the outer periphery. The plurality of reinforcing expansion rings (15) are arranged in a stepped structure from the outermost ring to the innermost ring, and the depth of the upper end surface and the lower end surface of the cover body (1) is gradually increased from the outermost ring to the innermost ring, so as to improve the pressure resistance of the cover body (1).

3. The metal easy-open end with high compressive strength according to claim 2, characterized in that: The score line protection reinforcement rib (12) is arranged between the score line (11) and the outermost circle of the reinforcement expansion ring (15), and the score line protection reinforcement rib (12) and the score line (11) are formed at an equidistant distance.

4. The metal easy-open end with high compressive strength according to claim 2 or 3, characterized in that: The upper end surface of the cover body (1) is provided with crescent-shaped reinforcing ribs (13) which are radially symmetrical with respect to the pull ring (2) and the cover body (1).

5. The metal easy-open end with high compressive strength according to claim 4, characterized in that: One end of the pull ring (2) close to the center of the cover body (1) is a pulling end, and the other end is a pressing end. A rivet (14) is provided between the pulling end and the pressing end, and the pull ring (2) is riveted to the cover body (1) via the rivet (14).

Images