CN218840103U

CN218840103U - Expansion-resistant pop-top can and lid

Info

Publication number: CN218840103U
Application number: CN202222803175.9U
Authority: CN
Inventors: 李宏; 蔡水根; 方可; 赵婉茹
Original assignee: Xiamen Baofeng Group Co ltd
Current assignee: Xiamen Baofeng Group Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-04-11
Anticipated expiration: 2032-10-24

Abstract

The utility model provides a but expansion-resistant easy-open cover, which comprises a cover body, the lid surface is attached to have at least one deck coefficient of thermal expansion to be less than the metal level of lid, just the thickness of metal level is less than the thickness of lid. The utility model also provides a zip-top can, including the aforesaid but anti inflation easy-open lid. Through the utility model discloses the scheme has improved the anti inflation effect of easy-open cover.

Description

Expansion-resistant pop-top can and lid

Technical Field

The utility model relates to a food package technical field particularly, relates to an anti inflation easy-open cover, easy open can.

Background

The pop-top can is widely applied to the sealing of two-piece aluminum cans or three-piece iron cans, is used for packaging food and beverage, and is convenient to sell and consume. However, in the process of transporting pop-top cans of food and beverage, especially gas-containing food and beverage, due to the increase of the ambient temperature, the swelling degree of the pop-top can becomes higher, even the tongue piece bursts, so that abnormal opening is caused, the package can be failed, and the leaked food and beverage can induce other pop-top cans to fail. At present, the technical means for coping with the excessive bulging of the easy-open lid caused by the temperature rise is to improve the strength of a material used by the easy-open lid, but the strength which can be achieved by an aluminum alloy which is a common material of the easy-open lid is limited, and an alloying method for improving the strength of an aluminum material is very easy to cause the corrosion resistance of the aluminum alloy to be poor, so that the easy-open lid is easily damaged in a medium with the corrosion resistance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a but anti expanded easy-open lid, simple structure aims at improving current easy-open lid and is used for the expanded problem of tympanites when heaing up.

The utility model adopts the following scheme:

the application provides an anti-expanding easy-open lid, including the lid, the lid surface is additional to have at least one deck coefficient of thermal expansion to be less than the metal level of lid, just the thickness of metal level is less than the thickness of lid.

Further, the thickness of the metal layer is 0.5% -8% of the thickness of the easy-open cover.

Further, the cover body is made of aluminum alloy, and the metal layer is made of copper, titanium or chromium.

Further, the cover body is made of aluminum alloy, and the metal layer is made of copper alloy, titanium alloy or chromium alloy.

Further, the metal layer is attached to the cover body by means of electroplating.

Further, the metal layer is attached to the bottom of the lid.

Further, a plurality of metal layers with different thermal expansion coefficients are arranged below the cover body, and the thermal expansion coefficients of the metal layers are gradually reduced from top to bottom.

A pop can comprises a can body and the anti-expansion pop cover, wherein the pop cover is fixed on the can body.

Has the advantages that:

the utility model discloses the scheme is through electroplating or other metal additional processes additional one deck or the lower metal of multilayer coefficient of thermal expansion on the aluminum alloy material of conventional easy-open lid system lid, make under the condition that ambient temperature improves, the internal stress that can utilize the coefficient of thermal expansion difference to lead to suppresses the drum lid and the deformation of easy-open lid, the metal level that utilizes the coefficient of thermal expansion lower deformability is lower when the temperature risees, thereby produce the tensile stress of opposite direction to the direction of expansion of lid, can effectively prevent the inflation of lid, thereby reduce the tongue piece and explode the risk that the tongue piece leads to easy-open lid inefficacy, can also keep the holistic performance of material not influenced.

Drawings

Fig. 1 is a schematic view showing a structure of an expansion-resistant lid for a pop-top can according to an embodiment of the present invention;

icon: lid 1, metal level 2, jar body 3.

Detailed Description

Examples

Referring to fig. 1, the present embodiment provides a pop can, which includes a can body 3, and further includes an anti-expansion pop can lid, wherein the pop can lid is fixed on the can body 3.

The anti-expansion easy open lid described in this embodiment includes a lid body 1, at least one metal layer 2 having a thermal expansion coefficient lower than that of the lid body 1 is attached to the surface of the lid body 1, and the thickness of the metal layer 2 is smaller than that of the lid body 1.

In the present embodiment, the cover body 1 may be a commonly used aluminum alloy product or other metal product, and the aluminum alloy product is taken as an example and described in detail herein. The shape of the easy-open cover is designed according to the opening of the tank body 3, and the side edge of the easy-open cover is fixed on the side edge of the tank body 3, so that the easy-open cover and the tank body 3 are tightly fixed.

The metal layer 2 can be attached to the lid 1 by electroplating, and the metal layer 2 can be covered on the lid 1 up and down or only disposed under the lid 1, both of which can achieve the effect of suppressing the swelling of the lid 1, and preferably, the metal layer 2 can be disposed under the lid 1, which can save materials and facilitate processing. Of course, the metal layer 2 can be attached in other ways, such as directly fixed by pressing or the like. The metal layer 2 may be made of a metal material having a thermal expansion coefficient lower than that of the aluminum alloy, such as copper, titanium, or chromium, or may be made of an alloy material such as a copper alloy, a titanium alloy, or a chromium alloy, which has good workability and is easily attached to the lid body 1 by various attachment methods. Of course, the metal layer 2 material that can be used is not limited thereto.

In a preferred embodiment, the thickness of the metal layer 2 is 0.5% -8% of the thickness of the easy open lid. The thickness of the metal layer 2 is far smaller than that of the cover body 1, the processability is good, the overall strength and other properties of the material are not affected, and the anti-expansion effect can be achieved under the thickness.

In another preferred embodiment, a plurality of metal layers 2 with different thermal expansion coefficients are arranged below the cover body 1, and the thermal expansion coefficient of the metal layers 2 decreases from top to bottom. The expansion of the upper metal layer 2 or the lid body 1 is suppressed by the lower metal layer 2 having a low thermal expansion coefficient, and the expansion suppressing effect on the lid body 1 is further improved by stacking the metal layers one on another. Of course, the total thickness of the multi-layer metal layer 2 is still within 0.5% to 8% of the thickness of the easy open lid.

To verify the inhibition effect of the metal layer 2, a number of examples were compared as follows:

example 1: the cap body 1 of this example was made of a conventional aluminum alloy having a thickness of 0.224mm, was filled with 330ml of a uniform content without adding another metal layer 2, and was swollen by 3.56mm on average compared with the cap surface at room temperature after heat-insulating at 38 ℃ for 1 hour.

Example 2: in the present embodiment, a 0.224mm conventional aluminum alloy is used as the lid body 1, and a 1.23 μm titanium metal layer 2 is added to the entire lid body 1, corresponding to 0.5% of the entire thickness, for filling 330ml of uniform contents, and after heat preservation at 38 ℃ for 1 hour, the lid surface bulges by 2.89mm on average compared with the room temperature lid surface.

Example 3: in this example, a conventional aluminum alloy of 0.224mm is used as the lid body 1, and a titanium metal layer 2 of 19.54 μm is integrally formed on the lid body 1, corresponding to 8% of the entire thickness, and filled with 330ml of a uniform content, and after heat preservation at 38 ℃ for 1 hour, the lid surface bulges 0.63mm on average compared with the lid surface at room temperature.

Example 4: in this example, a conventional aluminum alloy of 0.224mm is used as the lid body 1, and a titanium metal layer 2 of 9.55 μm is integrally added to the lid body 1, corresponding to 4% of the entire thickness, for filling 330ml of uniform contents, and after heat preservation at 38 ℃ for 1 hour, the lid surface bulges 1.52mm on average compared with the lid surface at room temperature.

Example 5: in this example, a conventional aluminum alloy of 0.224mm is used as the lid body 1, and a titanium metal layer 2 of 4.74 μm, corresponding to 2% of the entire thickness, is added to the lid body 1 as a whole, and is filled with 330ml of a uniform content, and after heat preservation at 38 ℃ for 1 hour, the lid surface bulges by 2.21mm on average compared with the lid surface at room temperature.

Example 6: in this example, a conventional aluminum alloy of 0.224mm was used as the lid body 1, 4.92 μm of copper was added to the lid body 1 as a whole, corresponding to 2% of the whole thickness, and the lid body was filled with 330ml of a uniform content and held at 38 ℃ for 1 hour, and then the lid surface was raised by 2.43mm on average as compared with the lid surface at room temperature.

Through comparison among the above examples 1, 2, 3 and 4, it is demonstrated that the capping height expands less and less as the thickness of the titanium with the low thermal expansion coefficient is increased, which demonstrates that the additional metal layer 2 has an obvious inhibiting effect on the capping improvement, and is beneficial to avoiding the failure of the lid. Examples 1, 5 and 6 show that the addition of copper and titanium can suppress the increase of the cap height and the effect of titanium is more excellent.

The utility model discloses the expanded principle of lid 1 can be restrained to metal level 2 does: because the thermal expansion coefficients of the metal layer 2 and the cover body 1 are different, and the thermal expansion coefficient of the metal layer 2 is low, when the temperature rises, the deformation amount of the metal layer 2 is lower than that of the cover body 1, and because the metal layer 2 is closely connected with the cover body 1, an internal tensile stress exists between the metal layer 2 and the cover body 1, namely, when the cover body 1 is about to generate a deformation height larger than that of the metal layer 2, the metal layer 2 is influenced by the metal layer 2, and the metal layer 2 generates a tensile stress with an opposite direction to the expansion direction of the cover body 1 due to the small deformation amount, so that the effect of inhibiting the deformation of the cover body 1 is achieved. Of course, since the thickness of the metal layer 2 is smaller than that of the lid 1, on one hand, the expansion of the lid 1 only needs to be controlled within a certain height, and on the other hand, since the cost price of the metal such as copper, titanium, chromium, etc. is much larger than that of the aluminum alloy, and the aluminum alloy is more suitable for being used as the main material of the lid 1, the thickness of the metal layer 2 needs to be controlled within 0.5% -8% of the thickness of the pop-top lid.

It should be understood that: above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.

The above description of the drawings used in the embodiments is only to illustrate some embodiments of the invention and should not be taken as limiting the scope, from which other relevant drawings can be derived by a person skilled in the art without inventive effort.

Claims

1. An anti-expansion easy open cover, comprising a cover body, characterized in that at least one metal layer with a thermal expansion coefficient lower than that of the cover body is attached on the surface of the cover body, and the thickness of the metal layer is smaller than that of the cover body.

2. The expansion-resistant lid according to claim 1, wherein the thickness of said metal layer is 0.5 to 8% of the thickness of said lid.

3. An expansion-resistant lid according to claim 2, wherein said lid body material is an aluminum alloy, and said metal layer material is copper or titanium or chromium.

4. An expansion-resistant lid according to claim 2, wherein said lid body material is an aluminum alloy, and said metal layer material is a copper alloy or a titanium alloy or a chromium alloy.

5. Expansion-resistant lid according to claim 2, characterized in that the metal layer is attached to the lid body by means of electroplating.

6. The expansion-resistant lid according to claim 1, wherein said metal layer is attached to the bottom of said lid body.

7. An expansion-resistant lid according to claim 1, wherein a plurality of metal layers having different thermal expansion coefficients are provided under said lid body, and the thermal expansion coefficients of said metal layers decrease from top to bottom.

8. A can comprising a can body, characterized by further comprising the expansion-resistant lid of any one of claims 1 to 7, said lid being fixed to said can body.