Pressure-withstanding basic lid, easy open lid, and ring-pull can with easy open lid

Abstract

The invention relates to a pressure-withstanding basic lid, an easy open lid, and a ring-pull can with the easy open lid. A can sealing area, a countersunk section, a thimble circular arc section (R7), a thimble upward extending section and a center lid surface are sequentially arranged on a cross section of the basic lid from the periphery to the center; the countersunk section further comprisesa sixth circular arc section (R6) and a second linear section (L2) tangent to each other; the second linear section (L2) is tangent to the thimble circular arc section (R7); and a circular center (Y6)of the sixth circular arc section (R6) is located under an upper surface (L4) of the center lid surface. According to the pressure-withstanding basic lid provided by the invention, the probability ofbreakage due to failure in pressure withstanding is reduced to 0.05 percent to 2.5 percent, so that the safety in use is greatly improved.

Description

technical field [0001] The invention relates to a basic cover, an easy-open cover and a pop-top can, in particular to a pressure-resistant basic cover, an easy-open cover and a pop-top can with an easy-open cover. Background technique [0002] Easy-open lids came out in the 1960s and are widely used in the matching packaging of beverage cans and beer cans. Due to the many advantages of light weight, small size, and reusable waste materials, easy-open lids have been vigorously promoted all over the world and have formed a huge production scale. With the continuous growth of the market demand for easy-open ends, the easy-open end industry is also developing rapidly, and the competition is becoming more and more fierce. Therefore, in order to save resources and reduce costs to meet the needs of market competition, research and develop a pressure-resistant easy-open end that saves materials. Covering is not only the need for the survival and development of enterprises, but also...

AI Technical Summary

Problems solved by technology

[0004] 1. Since the countersunk section is only connected by the first straight line section, the fourth arc section, and the fifth arc section, and the fourth arc section and the fifth arc section are circumscribed, the pressure test is being done When the test pressure reaches the pressure limit value, more than 80% of the countersunk section of the cover may rupture, and the safety of use is poor. It will burst, and the liquid in the tank will splash outward;

[0005] 2. Since the connection between the countersunk section and the arc section of the ring is the circumscribed connection of the arc to the arc, the contact area between the basic cover and the sealing mold (commonly known as the head) is too small when sealing the can, which is only a line contact, resulting in unstable seaming, and the quality of seaming is not easy to guarantee

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