Vacuum-sealed metal cap

Abstract

A vacuum-sealed metal cap primarily consists of an aluminum cap body and a TPE (thermoplastic elastomer) sealing ring. The cap body includes a movable vacuum knob surrounded by multiple bends, forming a three-dimensional structure at the top. The vacuum knob is convex upwards when there is no vacuum pressure; when a vacuum is created inside the container, the knob depresses downwards, indicating whether the container has been successfully sealed. The combination of the cap body and the sealing ring effectively improves the sealing effect. The TPE sealing ring has good elasticity and high-temperature resistance, allowing it to fit tightly against the container opening and prevent air from entering.

Claims

1. A vacuum-sealed metal cap, comprising a cap body and a sealing ring disposed inside the cap body; the cap body comprising an integrally formed top; the top comprising a vacuum button disposed in a central region, a first bend portion arranged in a ring around the vacuum button, a second bend portion arranged in a ring around and connecting the first bend portion, and a peripheral portion arranged in a ring around and connecting the second bend portion; the metal cap further comprising a side portion arranged in a ring around and connecting the peripheral portion; the peripheral portion being planar, a horizontal line defined by the upper surface of the peripheral portion, the portion where the first bend portion and the second bend portion are connected being defined as a first connecting portion, the height of the first connecting portion being lower than the horizontal line; characterized in that: the metal cap is made of aluminum; the thickness of the aluminum material is in the range of 0.25~0.2 mm. 2mm; the diameter of the top is in the range of 36.47~36.57mm; the diameter of the vacuum button is in the range of 16.09~16.15mm; the part where the first bend connects to the vacuum button is defined as a second connection part, the height of the second connection part is higher than the horizontal line; the difference between the height of the second connection part and the height of the horizontal line is in the range of 0.3~0.41mm; the vacuum button is convex upward in an environment without vacuum pressure, with its center point being the highest point, the height difference between the highest point and the horizontal line is in the range of 0.46~0.53mm; the height of the second connection part is higher than the edge of the vacuum button, thereby forming a third bend part between the second connection part and the edge; the material of the sealing ring is selected from thermoplastic elastomer (TPE), and it is coated and formed in a ring on the bottom surface of the outer periphery and the inner surface of the side.

2. The vacuum-sealed metal cap as claimed in claim 1, wherein, The diameter of the first bend portion, including the vacuum button, ranges from 25.75 to 25.85 mm; the diameter of the second bend portion, including the vacuum button and the first bend portion, ranges from 29.90 to 30.10 mm.

3. The vacuum-sealed metal cap as claimed in claim 1, wherein, The sealing ring includes a first portion attached to the bottom surface of the outer periphery, and a second portion connected to the first portion and attached to the inner surface of the side portion.

4. The vacuum-sealed metal cap as claimed in claim 3, wherein, The side extends beyond the end of the second part, thus forming a residual portion on the side.

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