Packaging tin

Abstract

The utility model provides a packaging tin, which comprises a tin cover, a cutting line, a sealing strip, a sealing strip and a sealing strip, wherein the cutting line extends along the circumferential direction of the tin cover; the pull ring is connected to the portion, on the inner circumference of the nick line, of the can cover through a rivet, and the end, away from the axis of the can cover, of the pull ring corresponds to the nick line, and is characterized in that the portion, on the inner circumference of the nick line, of the can cover is sequentially provided with a first reinforcing structure, a second reinforcing structure and a third reinforcing structure in the direction close to the axis of the can cover, the end part corresponds to the part, between the axis of the rivet and the cutting line, of the pull ring; the second reinforcing structure is a closed curve, and a sunken part in the axis direction of the can cover is arranged at the position corresponding to the rivet. According to the utility model, the first reinforcing structure and the second reinforcing structure are arranged on the can cover, so that the force for pulling the pull ring is concentrated on the cutting line, a user can easily open the can cover when pulling the pull ring, the pull ring cannot fall off due to overlarge pulling force for pulling the pull ring, and the experience of the user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging containers, and in particular relates to a packaging can. Background Art

[0002] The commonly used packaging cans nowadays include a can lid and a can body. The can lid is provided with a pull ring and usually a score line to facilitate users to open the can lid.

[0003] However, when the user pulls the pull ring upwards, it may be difficult to open the can lid due to insufficient pulling force, or the pulling force cannot be well controlled and the force is concentrated on the annular score line, resulting in the pull ring falling off before the can lid is opened, which greatly affects the user experience in the process of opening the can lid and may even cause injury to the user.

[0004] Therefore, designing a packaging can that can be easily opened by a user and whose pull ring will not fall off easily when the pull ring on the can lid is pulled has become a technical problem that needs to be solved urgently by those skilled in the art.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a packaging can. By arranging a first reinforcement structure and a second reinforcement structure on the can lid of the packaging can, the force of pulling the pull ring is concentrated on the score line, so that the user can easily open the can lid when pulling the pull ring, thereby solving the problem that the can lid of the packaging can cannot be easily opened and the pull ring on the can lid will easily fall off when pulling it.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0008] A packaging can comprises: a can cover, with a score line extending along the circumference thereof near the edge thereof; a pull ring connected to the can cover at the inner circumference of the score line by rivets, with one end of the pull ring away from the axis of the can cover corresponding to the score line, characterized in that the can cover at the inner circumference of the score line and in the direction close to the axis of the can cover are sequentially provided with:

[0009] A first reinforcement structure extends from both sides of the pull ring along the circumference of the can cover, and the end portion corresponds to the portion of the pull ring located between the rivet axis and the score line;

[0010] The second reinforcement structure is a closed curve, and a concave portion is arranged in the direction of the axis of the tank cover corresponding to the rivet.

[0011] Furthermore, the straight-line distance between the end of the first reinforcement structure and the axis of the tank cover is greater than or equal to the straight-line distance between the end of the rivet away from the axis of the tank cover and the axis of the tank cover.

[0012] Furthermore, the two ends of the second reinforcing structure recessed portion correspond to the two sides in the width direction of the pull ring, and are recessed from the two sides of the pull ring toward the axis direction of the can cover;

[0013] The width of the pull ring gradually increases in the direction close to the axis of the can cover.

[0014] Furthermore, the pull ring is symmetrical with respect to a vertical line between the axis of the rivet and the axis of the can cover.

[0015] Further, the width of the first reinforcement structure along the radial direction of the tank cover is greater than the width of the second reinforcement structure along the radial direction of the tank cover;

[0016] The first reinforcement structure and the second reinforcement structure are provided on the boss and are press-type structures that are convex upward and / or concave downward.

[0017] Furthermore, the tank cover is groove-shaped, and a boss is provided on the bottom of the groove;

[0018] The lower end of the groove wall of the tank cover is bent and extended inwardly and upwardly to form a groove, and one side of the groove close to the axis of the tank cover is bent and extended in a direction close to the axis of the tank cover to form a boss.

[0019] Furthermore, the score line is arranged on the inner periphery of the groove and is close to the groove.

[0020] Furthermore, it also includes a can body, and the outer periphery of the can cover is connected to the can body through a double curling edge, and the double curling edge is bent and extended downward in a direction away from the axis of the can body.

[0021] Furthermore, a third reinforcement structure is provided on the bottom wall of the tank body;

[0022] The third reinforcement structure is a press-type that is convex upward and / or concave downward, and includes at least two circles arranged in the radial direction, and the outermost circle is adjacent to the side wall of the can body.

[0023] Furthermore, the invention comprises a tank body and a tank cover, wherein the inner and outer surfaces of the tank body and the tank cover are respectively provided with an anti-corrosion layer, and the anti-corrosion layer is a polyester coating film.

[0024] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0025] 1. The utility model arranges the first reinforcement structure and the second reinforcement structure on the can cover, so that the force of pulling the pull ring is concentrated on the score line, so that the user can easily open the can cover when pulling the pull ring, and the pull ring will not fall off due to excessive pulling force of the pull ring, so that the pull ring is more stable and the user experience is improved.

[0026] 2. The utility model sets the can cover to be groove-shaped, and a boss is arranged on the bottom of the groove. The lower end of the groove wall of the can cover is bent and extended inwardly and upwardly to form a groove. The side of the groove close to the axis of the can cover is bent and extended in the direction close to the axis of the can cover to form a boss. The score line is arranged on the inner periphery of the groove and close to the groove. When the pull ring is pulled, the force applied can be more concentrated and strengthened at the score line, thereby further improving the convenience of opening the can cover.

[0027] 3. The utility model can increase the strength of the bottom wall of the tank body by arranging the fourth reinforcement structure on the bottom wall of the tank body, thereby ensuring the pressure resistance of the bottom wall of the tank body and avoiding deformation of the bottom wall of the tank body during transportation, thereby improving the transportation performance of the tank bottom.

[0028] 4. The utility model forms a closed container by double-rolling the can body and the can cover of the packaging can, and arranges the anti-corrosion layer of the can body and the can cover on the inner and outer surfaces of the can body and the can cover as a polyester coating, so that the packaging can has corrosion resistance. At the same time, after rolling and sealing, the hidden danger of corrosion factors caused by the contact of different metals is effectively avoided, and the sealing and safety of the food packaging can are effectively guaranteed.

[0029] At the same time, the utility model has a simple structure, significant effects and is suitable for popularization and use.

[0030] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of the structure of the can body of the food packaging can in the embodiment of the utility model;

[0033] Figure 2 It is an axonometric view of the can body of the food packaging can in the embodiment of the utility model;

[0034] Figure 3 This is a schematic structural diagram of a can lid of a food packaging can in an embodiment of the utility model;

[0035] Figure 4 It is a cross-sectional view of a can lid of a food packaging can in an embodiment of the utility model;

[0036] Figure 5 A schematic diagram of the structure of a food packaging can in an embodiment of the utility model;

[0037] Figure 6 A schematic cross-sectional view of the double curled edge of a food packaging can in an embodiment of the present invention.

[0038] Description of the main components in the figure:

[0039] 1. Can body; 2. Can cover; 201. Boss; 2011. Annular surface; 3. Double curling; 301. Can body hook; 302. Can cover hook; 3021. First bending section; 3022. Second bending section; 4. Polyester coating; 5. Reinforcement structure; 501. First reinforcement structure; 502. Second reinforcement structure; 503. Third reinforcement structure; 504. Fourth reinforcement structure; 6. Pull ring; 7. Rivet; 8. Score line.

[0040] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1

[0045] like Figures 1 to 6 As shown, in the embodiment of the utility model, a packaging can is introduced, including a can body 1 and a can cover 2, wherein the can cover 2 is arranged on the can body 1 and connected with the can body 1 through a double curling edge 3 to form a closed container.

[0046] Specifically, in the embodiment of the utility model, the can cover 2 includes a can cover hook 302, and the can cover hook 302 and the can body hook 301 on the side wall of the can body 1 form a double curled edge 3 so that the can body 1 and the can cover 2 form a closed container to ensure the sealing of the packaging can; the can body hook 301 is bent and extended downward in a direction away from the axis of the can body 1, and the can cover hook is fitted with the can body hook from the top of the can body hook; the double curled edge 3 is bent and extended downward in a direction away from the axis of the can body 1.

[0047] Specifically, in the embodiment of the utility model, the can cover 2 also includes a score line 8 extending along its circumference and arranged near its edge, and the pull ring 6 is connected to the can cover 2 on the inner circumference of the score line 8 through a rivet 7, and the end of the pull ring 6 away from the axis of the can cover 2 corresponds to the score line 8, so as to facilitate opening the can cover 2.

[0048] like Figure 3 and 5 As shown, in the embodiment of the utility model, the pull ring 6 is riveted to the tank cover 2 by means of rivets 7, and the pull ring 6 is arranged parallel to the tank cover 2.

[0049] Specifically, in the embodiment of the utility model, the pull ring 6 includes a pulling part and a fixing part. The pulling part is located on the side of the fixing part away from the score line 8. A pull ring hole is provided on the pulling part to facilitate pulling the pull ring. A pointed part is provided on the side of the pulling part close to the score line 8, which is arranged corresponding to the score line 8 to facilitate tearing of the score line 8 when the pull ring is pulled.

[0050] Preferably, the width of the pull ring 6 gradually increases along the direction approaching the axis of the can cover 2 .

[0051] Specifically, an upward protrusion is also provided on the boss 201, and the protrusion corresponds to the lower end of the pulling portion of the pull ring 6 away from the score line 8, and has a supporting effect on the pull ring.

[0052] like Figure 3 As shown, in the embodiment of the utility model, a first reinforcement structure 501 is provided on the can cover 2 on the inner periphery of the score line 8. The first reinforcement structure 501 extends from both sides of the pull ring 6 along the circumference of the can cover 2, and the end portion corresponds to the portion of the pull ring 6 located between the axis of the rivet 7 and the score line 8.

[0053] When the pull ring 6 is pulled, the force exerted by the pull ring 6 on the can lid 2 is concentrated on the score line 8, preventing the pull ring 6 from falling off and making the can lid difficult to open; at the same time, the pull ring 6 can also be positioned to prevent the pull ring from rotating randomly when the user pulls the pull ring 6 and affecting the efficiency of opening the can lid 2, thereby improving the user's experience.

[0054] Preferably, in the embodiment of the utility model, the straight-line distance between the end of the first reinforcing structure 301 and the axis of the tank cover 2 is equal to the straight-line distance between the end of the rivet 7 away from the axis of the tank cover 2 and the axis of the tank cover 2 .

[0055] like Figure 3 As shown, in the embodiment of the utility model, the first reinforcement structure 501 is provided with a second reinforcement structure 502 along the direction close to the axis of the tank cover 2. The second reinforcement structure 502 is a closed curve, and a recessed portion is provided in the direction of the axis of the tank cover 2 corresponding to the rivet 7.

[0056] Specifically, the two ends of the recessed portion of the second reinforcing structure 502 correspond to the two sides in the width direction of the pull ring 6, and are recessed from the two sides of the pull ring 6 toward the axis direction of the tank cover 2. The bottom end of the recessed portion close to the axis direction of the tank cover 2 corresponds to the pull ring hole away from the axis direction of the tank cover 2, thereby improving the convenience of opening the tank cover 2.

[0057] Preferably, the width of the first reinforcement structure 501 along the radial direction of the tank cover 2 is greater than the width of the second reinforcement structure 502 along the radial direction of the tank cover 2 .

[0058] When the can lid 2 is not opened, the pull ring 6 is parallel to the can lid 2; in the process of opening the can lid 2, the pull ring 6 is pulled upward so that the tip of the pull ring 6 tears the corresponding part of the score line 8; by pulling the pull ring 6 to be basically perpendicular to the can lid 2, the tearing degree of the score line 8 at the corresponding part of the pull ring 6 is increased, and then the pull ring 6 is continued to be pulled upward to tear the score line 8 completely, so that the can lid 2 is separated from the can body 1, and the can lid 2 is opened.

[0059] like Figure 4 As shown, in the embodiment of the utility model, the can cover 2 of the packaging can is groove-shaped, including a groove bottom and a groove wall, and a groove is provided between the groove bottom and the groove wall, and the groove is connected through the groove.

[0060] Specifically, in the embodiment of the utility model, a boss 201 is provided on the bottom of the groove, the lower end of the groove wall is bent and extended inward and upward to form a groove, and one side of the groove close to the axis of the tank cover 2 is bent and extended in the direction close to the axis of the tank cover 2 to form the boss 201.

[0061] Furthermore, the score line 8 is arranged on the inner periphery of the groove and is arranged close to the groove.

[0062] When the user pulls the pull ring 6 upward, the force of the pull ring 6 can be more concentrated on the score line 8 through the first reinforcement structure 501, and the can cover 2 is pressed downward by the force of the pull ring 6, so that the score line 8 is partially opened; the pull ring 6 is continued to be pulled upward in a direction away from the axis of the can cover 2, so that the pull ring 6 is basically perpendicular to the can cover 2. In this process, the can cover 2 is easier to open through the recessed part of the second reinforcement structure 502; the pull ring 6 is then continued to be pulled upward to open the entire can cover 2. The score line 8 is arranged on the inner periphery of the groove and is arranged close to the groove, so that the user can easily open the can cover 2.

[0063] like Figures 3 to 5As shown, in the embodiment of the utility model, the fourth reinforcement structure 504 is arranged on the inner periphery of the second reinforcement structure 502 to enhance the strength of the tank cover 2.

[0064] Preferably, a plurality of fourth reinforcement structures 504 are provided, which are sequentially arranged along the radial direction of the tank cover 2 , and the intervals between adjacent fourth reinforcement structures 504 decrease sequentially along the direction away from the axis of the tank cover 2 .

[0065] Specifically, in the embodiment of the utility model, the fourth reinforcement structure 504 is arranged at the outermost periphery and adjacent to the second reinforcement structure 502. The fourth reinforcement structure portion is parallel to the first and second reinforcement structures 501, and the portion corresponding to the recessed portion of the second reinforcement structure 502 is a straight edge, and the straight edge is perpendicular to the straight line connecting the axis of the tank cover 2 and the axis of the rivet.

[0066] When the pull ring 6 is pulled to be basically perpendicular to the can cover 2, the fourth reinforcement structure 504 adjacent to the second reinforcement structure 502 is combined with the second reinforcement structure 502 to further strengthen the force of the pull ring 6 on the can cover 2, so that the force is concentrated on the score line 8, and the can cover 2 is more easily pressed open; at the same time, the force when the can cover 2 is pulled upward by pulling the pull ring 6 is strengthened.

[0067] Preferably, in the embodiment of the utility model, the tank body 1 and the tank cover 2 both include a substrate and inner and outer surfaces. The substrate is made of a lightweight aluminum alloy material with high primary utilization rate, which can be recycled and reused after use, and has excellent environmental protection effect; the inner and outer surfaces of the tank body 1 and the tank cover 2 are both provided with an anti-corrosion layer, and the thickness of the anti-corrosion layer is 3-20g / m 2 , making food packaging cans corrosion-resistant.

[0068] Specifically, in the embodiment of the utility model, the anti-corrosion layer is composed of a polyester coating 4, and the thickness of the polyester coating 4 provided on the outer surface of the tank body 1 and the tank cover 2 is 3-10 mg / m 2 The thickness of the polyester coating 4 provided on the inner surface of the can body 1 and the can cover 2 is 4-20 g / m 2 ; Polyester coated 4 aluminum alloy plate has excellent environmental protection, corrosion resistance, sulfur resistance, acid resistance, salt resistance and other properties, which can significantly increase the safety of food.

[0069] Preferably, the thickness of the polyester coating film 4 disposed on the inner surface of the can body 1 and the can cover 2 is greater than the thickness of the polyester coating film 4 disposed on the outer surface of the can body 1 and the can cover 2 .

[0070] When the food packaging cans are sterilized in various ways, the packaging cans are provided with a polyester coating 4 of suitable thickness on both the inner and outer surfaces, thereby avoiding excessive heavy metals and other food safety issues caused by high temperature and other factors, thereby ensuring the safety of the canned food.

[0071] like Figure 1As shown, in the embodiment of the utility model, the third reinforcing structure 503 arranged on the bottom wall of the tank body 1 is a pressed shape that is convex upward and concave downward, which increases the strength of the bottom wall of the tank body 1, ensures the pressure resistance of the bottom wall of the tank body 1, avoids deformation of the tank bottom during transportation, and improves the transportation performance of the tank body 1.

[0072] Preferably, the third reinforcement structure 503 includes at least two circles arranged in the radial direction, and the outermost circle is adjacent to the side wall of the tank body.

[0073] Embodiment 2

[0074] like Figures 1 to 6 As shown, in the embodiment of the utility model, a food packaging can is introduced, comprising a can body 1 and a can cover 2, wherein the can cover 2 is arranged on the can body 1 and connected with the can body 1 through a double curling edge 3 to form a closed container.

[0075] Specifically, in the embodiment of the utility model, the tank body 1 and the tank cover 2 both include a substrate and inner and outer surfaces. The substrate is made of a lightweight aluminum alloy material with high primary utilization rate, which can be recycled and reused after use, and has excellent environmental protection effect; the inner and outer surfaces of the tank body 1 and the tank cover 2 are both provided with an anti-corrosion layer, and the thickness of the anti-corrosion layer is 3-20g / m 2 , making food packaging cans corrosion-resistant.

[0076] Preferably, in the embodiment of the utility model, the thickness of the anti-corrosion layer provided on the inner surface of the tank body 1 and / or the tank cover 2 is greater than or equal to the thickness of the anti-corrosion layer provided on the outer surface of the tank body 1 and / or the tank cover 2.

[0077] Specifically, in the embodiment of the utility model, the anti-corrosion layer is composed of a polyester coating 4, and the thickness of the polyester coating 4 provided on the outer surface of the tank body 1 and the tank cover 2 is 3-10 mg / m 2 The thickness of the polyester coating 4 provided on the inner surface of the can body 1 and the can cover 2 is 4-20 g / m 2 ; Polyester coated 4 aluminum alloy plate has excellent environmental protection, corrosion resistance, sulfur resistance, acid resistance, salt resistance and other properties, which can significantly increase the safety of food.

[0078] Preferably, the thickness of the polyester coating film 4 disposed on the inner surface of the can body 1 and the can cover 2 is greater than the thickness of the polyester coating film 4 disposed on the outer surface of the can body 1 and the can cover 2 .

[0079] When the food packaging cans are sterilized in various ways, the packaging cans are provided with a polyester coating 4 of suitable thickness on both the inner and outer surfaces, thereby avoiding excessive heavy metals and other food safety issues caused by high temperature and other factors, thereby ensuring the safety of the canned food.

[0080] like Figure 1As shown, in the embodiment of the utility model, the tank body 1 includes side walls and a bottom wall, both inner and outer surfaces of which are provided with a polyester coating 4. The bottom wall is circular, and the side wall extends axially along the bottom wall. A tank body hook 301 extends from the upper end of the side wall of the tank body 1, and the reinforcement structure provided on the bottom wall of the tank body 1 is a third reinforcement structure 503.

[0081] Specifically, in the embodiment of the utility model, the can body hook 301 extends from the upper end of the side wall in a direction away from the axis of the can body 1; the connection between the can body hook 301 and the side wall has a certain curvature, which can increase the strength of the connection bend and avoid external forces and other factors that occur during the production or transportation of food packaging cans, causing the can body hook 301 to break, resulting in the inability to ensure the sealing and food safety of the food packaging can.

[0082] Specifically, in the embodiment of the utility model, the third reinforcing structure 503 arranged on the bottom wall of the tank body 1 is a pressed shape that is convex upward and concave downward, which increases the strength of the bottom wall of the tank body 1, ensures the pressure resistance of the bottom wall of the tank body 1, avoids deformation of the tank bottom during transportation, and improves the transportation performance of the tank body 1.

[0083] Furthermore, the third reinforcement structure 503 includes at least two circles arranged in the radial direction, and the outermost circle is adjacent to the side wall of the tank body.

[0084] like Figures 3 to 4 As shown, in the embodiment of the utility model, the can cover 2 includes a cover surface, a pull ring 6 and a rivet 7. The pull ring 6 and the can cover 2 are riveted together by the rivet 7. The can cover 2 is provided with a score line 8 for easy opening.

[0085] Specifically, the inner and outer surfaces of the can lid 2 are provided with a polyester coating 4, and the cover surface, the pull ring 6 and the rivet 7 are all made of aluminum alloy. When the cover surface, the pull ring 6 and the rivet 7 are connected to each other, the polyester coating 4 arranged on the surface thereof avoids direct contact with the aluminum alloy substrate, which causes easy corrosion, thereby improving the corrosion resistance of the can lid 2. At the same time, it can avoid corrosion at the riveted joint between the pull ring 6 and the rivet 7. When the can lid 2 is opened by the pull ring 6, the pull ring 6 will not be easily broken after being subjected to tension, thereby increasing the stability of the pull ring 6, avoiding injuries to users, and improving the user experience.

[0086] Specifically, in the embodiment of the utility model, the can cover 2 includes a cover surface, and the annular score line 8 is set on the edge of the cover surface, which can make the can cover 2 easy to open; the cover surface includes a central cover surface, multiple annular surfaces and multiple rings of annular reinforcement structures as the fourth reinforcement structure 504.

[0087] To be more specific, in the embodiment of the utility model, four annular surfaces 2011 are arranged on the cover surface, which are parallel to each other and arranged side by side, namely the first annular surface, the second annular surface, the third annular surface, and the fourth annular surface. The first annular surface is close to the center cover surface, and the second annular surface, the third annular surface, and the fourth annular surface are arranged outward in sequence. The fourth annular surface is arranged on the outermost side, close to the annular score line 8, and a fourth reinforcement structure 504 is provided between two adjacent annular surfaces 2011, which can effectively solve the problem of poor aluminum strength and increase the strength of the can cover 2.

[0088] Specifically, in the embodiment of the utility model, a through hole is provided on the fourth annular surface for fixing the rivet 7 , the rivet 7 and the pull ring 6 are riveted together, and the can cover 2 is opened by pulling the pull ring.

[0089] Preferably, in this embodiment, there is a certain height difference between each annular surface 2011 in the radial direction, and the height increases gradually along the direction close to the axis of the tank cover 2.

[0090] Preferably, Figure 3 As shown, in the embodiment of the utility model, a first reinforcing structure 501 is provided on the fourth annular surface of the can cover. The first reinforcing structure 501 is parallel to the annular score line 8, and can increase the strength of the annular score line 8, play a positioning role for the pull ring, and avoid the pull ring being divided due to the rotation direction when the pull ring is pulled.

[0091] Further preferably, the first reinforcement structure 501 extends from both sides of the pull ring 6 along the circumference of the tank cover 2, and the end portion corresponds to the portion of the pull ring 6 located between the axis of the rivet 7 and the score line 8, so as to facilitate opening the tank cover 2; and the straight-line distance between the end portion and the axis of the tank cover 2 is equal to the straight-line distance between the end portion of the rivet 7 away from the axis of the tank cover 2 and the axis of the tank cover 2, so as to further prevent the pull ring from falling off when being pulled.

[0092] Preferably, Figure 3 As shown, in the embodiment of the utility model, the reinforcement structure arranged between the third annular surface and the fourth annular surface on the tank cover 2 is a second reinforcement structure 502. The second reinforcement structure 502 is a closed curve, and a recessed portion in the axial direction of the tank cover 2 is arranged corresponding to the rivet 7, which can make it easier to partially open the tank cover 2 when the pull ring is pulled, further facilitating the complete opening of the tank cover 2.

[0093] like Figures 4 to 6 As shown, in the embodiment of the utility model, the can cover 2 also includes a can cover hook 302. The can cover hook 302 and the can body hook 301 on the side wall of the can body 1 form a double curling edge 3 so that the can body 1 and the can cover 2 form a closed container to ensure the sealing of the packaging can.

[0094] Specifically, in the embodiment of the utility model, the can body hook 301 bends and extends downward in a direction away from the axis of the can body 1, and the can cover hook fits with the can body hook from the top of the can body hook; the double curled edge 3 bends and extends downward in a direction away from the axis of the can body 1.

[0095] Preferably, the tank cover 2 is configured as a groove recessed into the tank body 1 , the outer periphery of the tank cover 2 fits with the inner periphery of the side wall of the tank body 1 , and the tank cover hook 302 extends from the upper end of the tank cover 2 in a direction away from the axis of the tank cover 2 .

[0096] like Figure 6 As shown, in the embodiment of the utility model, the can body hook 301 includes a first curved section 3021 and a second curved section 3022; the first curved section 3021 extends along the top and outer periphery of the can body hook 301, and the second curved section 3022 extends from the lower end of the first curved section 3021 upward and toward the inner periphery of the can body hook 301.

[0097] Specifically, in the embodiment of the utility model, the length of the first curved section 3021 extending along the outer periphery of the can body hook 301 is greater than the length of the can body hook 301, and the second curved section 3022 extends along the outer periphery of the side wall of the can body 1 toward the inner periphery of the can body hook 301, and the side close to the outer periphery of the side wall is at least partially in contact with the outer periphery of the side wall.

[0098] Preferably, in the embodiment of the utility model, the upper end of the tank body hook 301 is at least partially parallel to the side wall of the tank body 1 , and the lower end extends toward the second curved section 3022 , and the first curved section 3021 fits the outer periphery of the tank body hook 301 .

[0099] Before sealing the packaging can, the can cover hook 302 on the can cover 2 extends from the outer periphery of the can cover to a direction away from the axis of the can cover 1, and the can body hook 301 on the can body 1 extends from the upper end of the side wall to a direction away from the axis of the can body 1.

[0100] When sealing the packaging can, the end of the can body hook 301 is aligned with the inner side of the folded part of the can cover hook 302; then the can cover hook 302 is bent and extended downward in a direction away from the axis of the can cover 2, while driving the can body hook 302 to bend downward to form a double curling edge 3; the double curling edge 3 is bent and extended downward in a direction away from the axis of the can body 1 until the can cover hook 302 forms a first curved section 3021 and a second curved section 3022, and the can body hook 301 is in contact with the first curved section 3021.

[0101] After the packaging can is sealed, the double curled edge 3 is bent and extended downward in a direction away from the axis of the can body 1, wherein the can body hook 301 is bent and extended downward in a direction away from the axis of the can body 1, the can cover hook 302 is fitted with the can body hook 301 from the top of the can body hook 301, the first bent section 3021 extends along the top and outer periphery of the can body hook 301, and the second bent section 3022 is bent and extended from the lower end of the first bent section 3021 upward and toward the inner periphery of the can body hook 301.

[0102] The can body 1 and the can cover 2 are formed into a closed packaging can through double curling 3, and the packaging can has pressure resistance, and the pressure bearing capacity is -0.069~0.012Mpa.

[0103] In some specific embodiments, the polyester coating used for the anti-corrosion layer is a coating system based on modified polyester resin and ethyl acrylate, specifically modified polyester resin, ethyl acrylate, shellac resin, starch gel powder, filler, additives, and solvents; with the synergistic effect of modified titanium dioxide and silica powder filler, a coating with excellent acid resistance, sulfur resistance, and salt resistance is formed, and the hardness, flexibility, and scratch resistance of the coating are improved. The coating does not change color during the baking process, and especially has very good high-temperature sterilization resistance, which can prevent the coating from penetrating into the food when the packaging can is sterilized at high temperature when the packaging can is canned, posing a great hidden danger to food safety, and the destruction of the coating will greatly reduce the storage period of the food and reduce the price of the product; at the same time, by adding shellac resin and starch gel powder, their synergistic effect can be greatly improved, which can greatly improve the adhesion of the coating.

[0104] In some possible embodiments, the polyester coating is made of the following ingredients by weight: modified polyester resin 82, ethyl acrylate 24, lac resin 4, starch gel powder 6, filler 25, additive 2, solvent 62; the filler is a mixture of modified titanium dioxide and silicon powder in a mass ratio of 3:1; the additives include dispersants, leveling agents and defoamers, wherein the mass ratio of dispersants, leveling agents and defoamers is 1:0.8:0.3; the starch gel powder is prepared by boiling cassava starch, drying it in the sun, and then grinding it into powder, the particle size of the powder is 350-400 mesh; the modified The preparation method of the titanium dioxide is as follows: the titanium dioxide is prepared into an aqueous solution with a mass concentration of 12.5%, and nano-silicon dioxide with a mass of one tenth of the titanium dioxide is added thereto, and after stirring evenly, the temperature is adjusted to 72-80°C, and sodium fatty alcohol sulfate with a mass of one half of the nano-silicon dioxide is added, and after stirring at a speed of 150r / min for 40min, the mixture is kept warm and allowed to stand for 1-1.5h, and then filtered and dried; the particle size of the silicon powder and the titanium dioxide is 300-350 mesh; and the solvent is an equal mixture of two of aromatic hydrocarbon solvents, alcohol solvents or ester solvents.

[0105] The above description is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A packaging can, comprising: The can cover (2) is provided with a score line (8) extending along its circumference near its edge; A pull ring (6) is connected to the can cover (2) on the inner periphery of the score line (8) through a rivet (7), and one end of the pull ring (6) away from the axis of the can cover (2) corresponds to the score line (8). The pull ring (6) is characterized in that the can cover (2) on the inner periphery of the score line (8) is provided in sequence along the direction close to the axis of the can cover (2): A first reinforcing structure (501) extends from both sides of the pull ring (6) along the circumference of the can cover (2), with the end portion corresponding to the portion of the pull ring (6) located between the axis of the rivet (7) and the score line (8); The second reinforcement structure (502) is a closed curve, and a recessed portion is provided in the direction of the axis of the tank cover (2) at a position corresponding to the rivet (7).

2. The packaging can according to claim 1, characterized in that: The straight-line distance between the end of the first reinforcing structure (501) and the axis of the tank cover (2) is greater than or equal to the straight-line distance between the end of the rivet (7) on the side away from the axis of the tank cover (2) and the axis of the tank cover (2).

3. The packaging can according to claim 1, characterized in that: The two ends of the recessed portion of the second reinforcing structure (502) correspond to the two sides of the pull ring (6) in the width direction, and are recessed from the two sides of the pull ring (6) toward the axis of the can cover (2); The width of the pull ring (6) gradually increases in a direction approaching the axis of the can cover (2).

4. The packaging can according to claim 3, characterized in that: The pull ring (6) is symmetrical with respect to a vertical line between the axis of the rivet (7) and the axis of the can cover (2).

5. The packaging can according to any one of claims 1 to 4, characterized in that: The width of the first reinforcement structure (501) along the radial direction of the tank cover (2) is greater than the width of the second reinforcement structure (502) along the radial direction of the tank cover (2); The first reinforcement structure (501) and the second reinforcement structure (502) are arranged on the boss (201) and are press-formed and protrude upward and / or are recessed downward.

6. The packaging can according to any one of claims 1 to 4, characterized in that: The tank cover (2) is groove-shaped, and a boss (201) is provided on the bottom of the groove; The lower end of the groove wall of the tank cover (2) bends and extends inwardly and upwardly to form a groove, and the side of the groove close to the axis of the tank cover (2) bends and extends in a direction close to the axis of the tank cover (2) to form a boss (201).

7. The packaging can according to claim 6, characterized in that: The scoring line (8) is arranged on the inner periphery of the groove and is close to the groove.

8. The packaging can according to any one of claims 1 to 4, characterized in that: It also comprises a can body (1), wherein the outer periphery of the can cover (2) is connected to the can body (1) via a double curling edge (3), and the double curling edge (3) is bent and extended downward in a direction away from the axis of the can body (1).

9. The packaging can according to any one of claims 1 to 4, characterized in that: A third reinforcement structure (503) is provided on the bottom wall of the tank body (1); The third reinforcement structure (503) is a press-type structure that is convex upward and / or concave downward, and includes at least two circles arranged in the radial direction, with the outermost circle being adjacent to the side wall of the tank body.

10. The packaging can according to any one of claims 1 to 4, characterized in that: The invention comprises a tank body (1) and a tank cover (2), wherein the inner and outer surfaces of the tank body (1) and the tank cover (2) are respectively provided with an anti-corrosion layer, and the anti-corrosion layer is a polyester coating film (4).

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