Easy pull cover optimization design

by:Lisson     2020-11-18
Metal packaging material surface decorative performance is good, high strength, easy storage and transportation to highlight the characteristics of the increasingly are popular with the metal cans were originally used for packing food, the earliest can be traced back to 200 before the Napoleonic era, today's metal two piece, three piece cans has become carbonated drinks, juice, beer, etc. One of the main forms of packaging. Currently on the market many cans of xushuguan specifications and the pot cover mostly use TAB type easy open cover, however, the current use of easy open lid in structure are flawed.
1 TAB of the easy open lid open principle and classification of
TAB type easy open lid referred to as 'open type tank cover, this type of lid opening is convenient, is open as long as the pull of the disc ring and hold in tear open the lid. TAB type easy open lid open principle is: prefabricated indentation in the lid open first, to reduce the local strength, opens in the TAB near the relatively concentrated stress, under the action of shear force, is the indentation cracking and open it. Generally smaller tank inside and outside differential pressure, the shear force produced by indentation place small and uniform, can not to crack, to ensure the safety during transportation, storage, canned products.
TAB type easy by two forms: a za is a small mouth, TAB to pull up the lid open a small mouth, the small mouth can be sucked out or not within the fluid and the other is a big type, pull up almost the entire pot cover is opened, in order to remove the solid, powder or highly viscous dense built-in objects. This paper mainly discuss the small mouth easy open cover, this cover technique widely used in the cans, at present, the small mouth type easy open by two kinds: all tear and all tear. Two kinds of tank cover each have advantages and disadvantages.
2 small mouth type easy open lid
the whole analysis of characteristic of tear easy open cover the application of the time is long, the most widely used in the current beverage cans. Its style is shown in figure 1. All tear easy open lid mature manufacturing process, structure and beautiful, stacking performance is good, is keeping storage and display. However, full tear easy open lid TAB will be discarded after open, cause environmental pollution, and is likely to hurt others, this is all torn weakness of easy open lid. Aimed at the weakness of all tear easy open lid, people design all tear easy pull open the cover, as shown in figure 2

keep type easy open lid when the TAB to pull up the opening is not fell off the lid, but being pushed into the tank, this structure avoids the TAB and openings anywhere throw and harm and environmental pollution problems, however, this structure also has a lot of loopholes. Canned beverages, display sales and refrigerate in the delivery, as well as consumers carry into extremely easily by bacteria dust pollution of the tank, it is pushed into the opening of the tank with built-in content after contact, consumers' health is protected.
in addition, the above two kinds of the lift ring on the lid in the open is not very convenient, consumers have a peaceful experience which at the time of open the easy open lid TAB, is primarily a finger refers to hard cover, this design is not in conformity with the ease of use of humanized principle, from the ergonomics point of view, focus on best through your fingers when disc of ring, there's a catch to focus on requirements TAB at the end of the finger tip contact.

3 easy open lid optimization design based on the analysis of above, the author of optimization design was carried out on the tank cover, its style as shown in figure 3, for optimal design of the cover structure, the design of the application of design principle and the design principle of the reserve cover similar, only at the fulcrum of rivet, applying pressure at the end of the TAB is part. Hypothesis is geothermal resource will be down at the top of the roof pressure tank cover. Design and keep the lid is different, the rivet on the hero image film, such as pull TAB, the rivet will be upward force, under the action of shear stress, torn up, torn pieces are connected to the tank cover, at the end of cable. So that you can avoid torn pieces away from the tank cover completely, this design is for the tear and reserved type two kinds can cover faults, its structure to avoid the TAB is completely out of the pot cover environmental pollution and harm caused by the possibility of also can solve the problem of consumers drink health not guaranteed. In addition, the design pay attention to the tank cover at the end of the TAB groove is in and deep than the original design, so consumer is when the file TAB can use background emphatically not cover.

4 conclusion
the proposed optimal design considering the greening, human nature and the process factors. Although in recent years has a very wide range of application of beverage packaging plastic and paper, however, in the carbonated drinks and fruit juice, beer and other metal cans are still on the package is very big, metal cans packaging design should be more green, more human, only in this way can truly meet the needs of the consumers.
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