Aluminum-plastic composite cover

Abstract

The utility model discloses an aluminum-plastic composite cover which comprises an aluminum cover ring and a round plastic cover plate, the edge of the round plastic cover plate extends downwards to form a circle of side edge, the lower end portion of the side edge is provided with a connecting portion protruding inwards, one side of the aluminum cover ring is provided with a winding portion which is sealed with an opening portion of a can body in a winding mode, the other side of the aluminum cover ring is provided with a turnup portion, and the turnup portion clamps the connecting portion. At least one turnover cover body is arranged on the upper portion of the round plastic cover plate, matching structures which can be opened or buckled with each other are arranged between each turnover cover body and the upper portion of the round plastic cover plate, through holes are formed in the positions, corresponding to the turnover cover bodies, of the upper portion of the round plastic cover plate, and the through holes are covered when the turnover cover bodies and the upper portion of the round plastic cover plate are buckled. And when the turnover cover body and the upper part of the circular plastic cover plate are opened, the through hole is communicated with the outside. The sealing cover can be seamed with the opening of the aluminum can body, the cover body is convenient to open, the can body can be opened or closed repeatedly, and repeated sealing is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging container manufacturing, in particular to an aluminum-plastic composite cover. Background Art

[0002] Aluminum cans are widely used in the food industry. Aluminum cans are usually formed by an aluminum can body and an aluminum open lid that are rolled and sealed together. An aluminum handle needs to be riveted to the middle of the upper end of the existing aluminum open lid, and then a score line is set on the upper end surface of the aluminum open lid. When opening, the aluminum handle is pulled by hand to tear off a part of the aluminum open lid along the score line before the can body can be opened to pour out the material. However, due to the high toughness of aluminum, it takes a lot of force to open it and it is easy to hurt your hands, so it is inconvenient to open it. Moreover, this kind of open lid can only be used once, and the can body cannot be opened or closed multiple times, and repeated sealing cannot be achieved. In addition, the need to increase the riveting process also increases the difficulty of processing.

[0003] On August 10, 2005, a Chinese utility model patent No. 200420041320.3, entitled "Aluminum-plastic combination easy-pull bottle cap", was disclosed. The aluminum cap (1) includes an aluminum cap, a center hole (2) is provided at the center of the aluminum cap (1), and a plastic cap (3) is provided outside the aluminum cap (1). The characteristic is that one side of the center hole (2) of the aluminum cap (1) is a straight side, a tearing groove (4) is provided at the opening portion outside the center hole (2), the tearing groove (4) extends on the aluminum cap (1) all the way to the side wall of the aluminum cap (1), and an indication arrow (5) is provided on the plastic cap (3), the indication arrow (5) is provided opposite to the tearing groove (4) and is perpendicular to the straight side of the center hole (2) of the aluminum cap (1). Although the aluminum-plastic combination easy-pull bottle cap can solve the problems of easy rupture, hand injury and unsafety, it is difficult to roll and seal with the aluminum can body, and the can body cannot be repeatedly sealed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an aluminum-plastic composite cover which can be rolled and sealed with the mouth of an aluminum can body, and the cover body is easy to open and can open or close the can body for multiple times to achieve repeated sealing.

[0005] To achieve the above object, the technical solution of the utility model is: an aluminum-plastic composite cover, comprising an aluminum cover ring and a circular plastic cover plate, wherein a circle of side edges extend downward from the edge of the circular plastic cover plate, and a connecting portion protruding inward is provided at the lower end of the side edge, a winding portion sealed with the mouth of the can body is provided on one side of the aluminum cover ring, and a roll-up portion is provided on the other side of the aluminum cover ring, and the roll-up portion clamps the connecting portion;

[0006] At least one flip cover body is provided on the upper part of the circular plastic cover plate, and a matching structure that can be opened or buckled with each other is provided between each flip cover body and the upper part of the circular plastic cover plate. A through hole is provided on the upper part of the circular plastic cover plate corresponding to the flip cover body. When the flip cover body and the upper part of the circular plastic cover plate are buckled, the through hole is covered; when the flip cover body and the upper part of the circular plastic cover plate are opened, the through hole is connected to the outside.

[0007] Preferably, the upper portion of the circular plastic cover is provided with two reversible covers, which are respectively a first cover and a second cover. A plurality of first through holes are provided at the upper portion of the circular plastic cover corresponding to the first cover, and a second through hole is provided at the upper portion of the circular plastic cover corresponding to the second cover, and the cross-sectional area of ​​the second through hole is larger than the cross-sectional area of ​​the first through hole. In this way, the material in the can body can be poured out less and more slowly by opening the first cover through the plurality of first through holes; the material in the can body can be poured out more quickly by opening the second cover through the second through hole. The flexibility of use is better.

[0008] Furthermore, preferably, the cross-sectional area of ​​the second through hole is 10-30 times the cross-sectional area of ​​the first through hole.

[0009] Preferably, the matching structure includes a snap-in convex portion arranged at the lower side of the end of the flip cover body and a snap-in groove arranged at the upper part of the circular plastic cover plate, and the snap-in convex portion snaps into the snap-in groove when the flip cover body and the upper part of the circular plastic cover plate are buckled with each other, so as to facilitate opening or closing the flip cover body.

[0010] Further improvement, the cross-section of the aluminum cover ring includes an annular upper horizontal section and an annular lower horizontal section, one side of the annular upper horizontal section and one side of the annular lower horizontal section are connected by a cylindrical connecting section, the other side of the annular upper horizontal section is connected to the winding part, and the other side of the annular lower horizontal section is connected to the rolling part.

[0011] As a further improvement, a circle of annular groove is formed between the outer side of the side edge and the aluminum cover ring, and the annular groove cooperates with the sealing guide wheel to facilitate the sealing between the aluminum cover ring and the mouth of the can body.

[0012] As a further improvement, the upper part of the circular plastic cover is provided with a recess, and when the flip cover is engaged with the upper part of the circular plastic cover, the flip cover is embedded in the recess, and the upper end surface of the flip cover is flush with the upper end surface of the circular plastic cover, further improving the aesthetics and structural rationality.

[0013] As a further improvement, a circle of connecting groove is provided on the inner side of the side edge near the connecting portion, and the free end of the rolled portion is inserted into the connecting groove and forms a tight fit with the connecting groove, thereby further improving the sealing performance of the connection between the aluminum cover ring and the circular plastic cover plate.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The winding part of the aluminum cover ring can be rolled and sealed with the mouth of the aluminum can.

[0016] 2. When the reversible cover body and the upper part of the circular plastic cover plate are buckled together, the through hole is covered, and when the reversible cover body and the upper part of the circular plastic cover plate are opened, the through hole is connected to the outside. In this way, the cover body is easy to open, and the can body can be opened or closed multiple times to achieve repeated sealing.

[0017] 3. The reversible cover body and the circular plastic cover plate can be integrally injection molded, which is convenient to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the utility model in a closed state of the flip cover;

[0019] Figure 2 This is a top view of the utility model in a closed state of the flip cover;

[0020] Figure 3 yes Figure 2 AA section view;

[0021] Figure 4 yes Figure 3 The enlarged view of point B;

[0022] Figure 5 This is a bottom view of the utility model in a closed state of the flip cover;

[0023] Figure 6 This is a three-dimensional diagram of the utility model in which the reversible cover is in an open state;

[0024] Figure 7 This is a top view of the utility model in an open state of the flip cover;

[0025] Figure 8 yes Figure 7 CC cross-sectional view. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Figures 1 to 8As shown, an aluminum-plastic composite cover comprises an aluminum cover ring 1 and a circular plastic cover plate 2. A side edge 21 extends downward from the edge of the circular plastic cover plate 2. A connecting portion 22 protruding inward is provided at the lower end of the side edge 21. A winding portion 11 sealed with the mouth of the can body is provided on one side of the aluminum cover ring 1. A roll-up portion 12 is provided on the other side of the aluminum cover ring 1. The roll-up portion 12 clamps the connecting portion 22. The cross section of the aluminum cover ring 1 comprises an annular upper horizontal section 13 and an annular lower horizontal section 14. One side of the annular upper horizontal section 13 and one side of the annular lower horizontal section 14 are connected by a cylindrical connecting section 15. The other side of the annular upper horizontal section 13 is connected to the winding portion 11, and the other side of the annular lower horizontal section 14 is connected to the roll-up portion 12.

[0028] The inner side of the side edge 21 is provided with a circle of connecting grooves 23 near the connecting portion 22, and the free end of the roll-up portion 12 is inserted into the connecting groove 23 and forms a tight fit with the connecting groove 23, so that the connection and sealing performance between the aluminum cover ring 1 and the circular plastic cover plate 2 is better.

[0029] An annular groove 24 is formed between the outer side of the side edge 21 and the aluminum cover ring 1, and the annular groove 24 cooperates with the sealing guide wheel to facilitate the sealing between the aluminum cover ring 1 and the mouth of the aluminum can.

[0030] The circular plastic cover plate 2 is provided with two reversible cover bodies 3 on the upper part, and the two reversible cover bodies 3 are respectively a first cover body 31 and a second cover body 32. A plurality of first through holes 25 are provided on the upper part of the circular plastic cover plate 2 corresponding to the first cover body 31, and a second through hole 26 is provided on the upper part of the circular plastic cover plate 2 corresponding to the second cover body 32, and the cross-sectional area of ​​the second through hole 26 is larger than the cross-sectional area of ​​the first through hole 25. Preferably, the cross-sectional area of ​​the second through hole 26 is 10-30 times the cross-sectional area of ​​the first through hole 25. In this way, after the winding portion 11 of the aluminum cover ring 1 is rolled and sealed with the mouth of the can body, the material in the can body can be quickly poured out by opening the second cover body 32, and the material in the can body can be slowly poured out in small amounts by opening the first cover body 31, so as to be used multiple times.

[0031] A matching structure 4 that can be opened or buckled with each other is provided between each flip cover body 3 and the upper part of the circular plastic cover plate 2. The matching structure 4 includes a snap-fitting protrusion 41 arranged on the lower side of the end of the flip cover body 3 and a snap-fitting groove 42 arranged on the upper part of the circular plastic cover plate 2. When the flip cover body 3 and the upper part of the circular plastic cover plate 2 are buckled with each other, the snap-fitting protrusion 41 is snapped into the snap-fitting groove 42.

[0032] Recombination Figure 3 and Figure 6As further shown, two clearance grooves 27 are provided on the upper part of the circular plastic cover plate 2. When the first cover body 31 of a flip cover body 3 is buckled with the upper part of the circular plastic cover plate 2, the first cover body 31 of the flip cover body 3 is embedded in one clearance groove 27, and the upper end surface of the first cover body 31 of the flip cover body 3 is flush with the upper end surface of the circular plastic cover plate 2; when the second cover body 32 of another flip cover body 3 is buckled with the upper part of the circular plastic cover plate 2, the second cover body 32 of the flip cover body 3 is embedded in another clearance groove 27, and the upper end surface of the second cover body 32 of the flip cover body 3 is flush with the upper end surface of the circular plastic cover plate 2.

[0033] Recombination Figure 1 , Figure 3 As shown, when the first cover body 31 of a flip cover body 3 is buckled with the upper part of the circular plastic cover plate 2, all the first through holes 25 are covered, and when the first cover body 31 and the upper part of the circular plastic cover plate 2 are opened, all the first through holes 25 are connected to the outside; when the second cover body 32 of the other flip cover body 3 is buckled with the upper part of the circular plastic cover plate 2, the second through holes 26 are covered, and when the second cover body 32 and the upper part of the circular plastic cover plate 2 are opened, the second through holes 26 are connected to the outside.

[0034] When the present embodiment is used, the winding portion 11 is wound and sealed with the mouth of the aluminum can body. When the can body is to be opened, the first cover 31 can be opened to slowly pour out a small amount of material in the can body, or the second cover 32 can be opened to quickly pour out the material in the can body.

[0035] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. An aluminum-plastic composite cover, characterized in that: It comprises an aluminum cover ring and a circular plastic cover plate. The edge of the circular plastic cover plate extends a circle of side edges downwards. The lower end of the side edges is provided with a connecting portion protruding inwards. One side of the aluminum cover ring is provided with a winding portion sealed with the mouth of the can body. The other side of the aluminum cover ring is provided with a rolling portion, and the rolling portion clamps the connecting portion. At least one flip cover body is provided on the upper part of the circular plastic cover plate, and a matching structure that can be opened or buckled with each other is provided between each flip cover body and the upper part of the circular plastic cover plate. A through hole is provided on the upper part of the circular plastic cover plate corresponding to the flip cover body. When the flip cover body and the upper part of the circular plastic cover plate are buckled, the through hole is covered; when the flip cover body and the upper part of the circular plastic cover plate are opened, the through hole is connected to the outside.

2. The aluminum-plastic composite cover according to claim 1, characterized in that: The circular plastic cover plate has two flip cover bodies at the upper part, which are respectively a first cover body and a second cover body. A plurality of first through holes are arranged at the upper part of the circular plastic cover plate corresponding to the first cover body, and a second through hole is arranged at the upper part of the circular plastic cover plate corresponding to the second cover body, and the cross-sectional area of ​​the second through hole is greater than the cross-sectional area of ​​the first through hole.

3. The aluminum-plastic composite cover according to claim 2, characterized in that: The cross-sectional area of ​​the second through hole is 10-30 times the cross-sectional area of ​​the first through hole.

4. The aluminum-plastic composite cover according to claim 1, characterized in that: The matching structure includes a snap-in convex portion arranged at the lower side of the end of the flip cover body and a snap-in groove arranged at the upper part of the circular plastic cover plate. When the flip cover body and the upper part of the circular plastic cover plate are buckled with each other, the snap-in convex portion is snapped into the snap-in groove.

5. The aluminum-plastic composite cover according to claim 1, characterized in that: The cross section of the aluminum cover ring includes an annular upper horizontal section and an annular lower horizontal section. One side of the annular upper horizontal section and one side of the annular lower horizontal section are connected by a cylindrical connecting section, the other side of the annular upper horizontal section is connected to the winding part, and the other side of the annular lower horizontal section is connected to the rolling part.

6. The aluminum-plastic composite cover according to claim 1, characterized in that: A circle of annular groove is formed between the outer side of the side edge and the aluminum cover ring, and the annular groove cooperates with the sealing guide wheel to facilitate the sealing between the aluminum cover ring and the mouth of the can body.

7. The aluminum-plastic composite cover according to claim 1, characterized in that: The upper part of the circular plastic cover plate is provided with a recess. When the flip cover body is buckled with the upper part of the circular plastic cover plate, the flip cover body is embedded in the recess, and the upper end surface of the flip cover body is flush with the upper end surface of the circular plastic cover plate.

8. The aluminum-plastic composite cover according to any one of claims 1 to 7, characterized in that: The inner side of the side edge is provided with a circle of connecting groove near the connecting portion, and the free end of the rolled portion is inserted into the connecting groove and forms a tight fit with the connecting groove.

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