Container lid of operation type vacuum valve

Abstract

A sealed container lid of a vacuum valve operation type is provided, in which an engagement structure of a silicon packing is simple, and a relatively strong sealing force is obtained. A process for engaging or disengaging a lid to a container body may be performed based one-touch method. The sealed contained lid of a vacuum valve operation type comprises a body which is injection-molded and has a circular groove formed in a horizontally and outwardly opened shape for an engagement of the silicon packing, and a downwardly bent peripheral part which is formed at an outer peripheral part of the body based on a double injection method while surrounding the same.

Description

field of invention [0001] The present invention relates to a sealed container lid with a vacuum valve. Background technique [0002] Usually, airtight container all adds a cover outside to cover container when sealing storage certain raw material, and sealing pad is contained in the container lid, and sealing pad keeps the edge of container body in close contact. Sealed containers may be provided with locking wings to allow the lid to achieve a sealing engagement. [0003] However, in a cap joining method with a simple structure, there is a disadvantage of insufficient sealing strength. In an example with the locking wing method, although the sealing strength of the cover will be better, it is inconvenient to open or close the locking wing during use. [0004] As shown in FIG. 3, a vacuum valve 22 is installed at the center of the container lid 21. As shown in FIG. A silicon gasket 23 is mounted adjacent to the outside of the container body. When the container cover 21 i...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned conventional art, it is impossible to form an annular groove opening in the horizontal direction for the reason described later.

That is, since the downwardly curved peripheral portion 31 is formed on the outer peripheral portion of the container cap 21 and surrounds the outer peripheral portion 24a of the container body 24, and the downwardly curved peripheral portion 31 and the annular groove 30 simultaneously achieve ideal Design conditions, so manufacturing by injection molding is still not possible, i.e., in the above construction, the mold cannot be separated during manufacturing

Therefore, the conventional technology shown in Fig. 4 cannot be practically adapted to industrial production

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