A heat-sealable sealing device

Abstract

The invention provides a sealing device capable of performing thermal package, belonging to the field of flexible package containers. The sealing device comprises an upper cover and a lower tube, wherein the upper cover comprises a cover body and a one-piece anti-theft ring; the top wall of the inner part of the cover body is provided with an elastic sealing plug; the inner wall of the cover body is provided with inner threads; the bottom end of the inner wall of the cover body is provided with limiting heads; the one-piece anti-theft ring is arranged along the outer edge of the cover body; the one-piece anti-theft ring is provided with anti-theft teeth and anti-theft ring easy-to-break openings; the cover body is connected with the one-piece anti-theft ring through anti-theft ring easy-to-break connection bands and anti-theft ring one-piece connection bands; the lower tube comprises a tube body and anti-theft pieces, flange pieces and an easy-to-seal boss which are connected with the tube body; and the outer wall of the tube body is provided with outer threads matched with the inner threads. After the upper cover is combined and assembled with the lower tube according to requirement, the upper cover is enabled to absolutely stop at a required position by the limiting heads; the sealing device can be applied to a larger temperature range; requirement of filling of liquids of different temperatures and equipment of different precision is met; and the problem of untight sealing or over-tight screwing between the upper cover and the lower tube is effectively solved.

Description

technical field [0001] The invention relates to the field of flexible packaging containers, in particular to a heat-sealable sealing device. Background technique [0002] With the rapid development of the packaging industry, the application of flexible packaging containers is becoming more and more extensive. Both the shape and the internal structure are required to be more perfect, so as to meet the safety and security of the product production process. [0003] The sealing device of flexible packaging includes an upper cover and a lower tube that cooperate with each other. In the current flexible packaging, there is a problem that the seal between the two is not tight or the screw is too tight, mainly because the plastic product itself has plastic deformation. , the corresponding filling temperature varies greatly, especially for products that require high-temperature filling or high-temperature sterilization. [0004] If the force of screwing the upper cover is too small...

AI Technical Summary

Problems solved by technology

[0004] If the force of screwing the upper cover is too small, the seal between the upper cover and the lower tube will not be tight, and it will easily leak after high temperature deformation; if the force of the upper cover is too large, the gap between the upper cover and the lower tube will The fit is too tight, difficult to open, etc.

Due to the small range of the most suitable screwing force and screwing angle, the above-mentioned problems inevitably occur in the sealing device

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