A kind of plastic packaging bag sealing equipment

Abstract

The invention discloses a plastic packaging bag sealing device, comprising a sealing device for sealing the packaging bag, a sealing leak-proof mechanism capable of clamping the mouth of the packaging bag, and a bag holding device capable of flatly spreading the packaging bag. The sealing device of the present invention heats the sealing knife by heating the heat-conducting material with a heating rod to heat the sealing knife, so that the sealing knife is heated evenly everywhere, ensuring that there is no temperature difference in the whole section of the sealing knife, and effectively solves the problem of increasing the length of the sealing knife due to heat. The resulting sealing temperature is not uniform, which in turn leads to problems such as the inability of uniform and effective heat sealing of packaging bags, especially large-sized packaging bags, or the scalding of the seam. And before the packaging bag is sealed, the bag mouth of the packaging bag can be pulled and leveled by the bag holding device, and at the same time, the bag mouth can be clamped by the sealing and leak-proof mechanism. It greatly reduces manual intervention operations, improves the sealing quality of packaging bags and the efficiency of packaging operations, and meets the needs of high-quality sealing packaging.

Description

technical field [0001] The invention relates to the technical field of packaging, in particular to a plastic packaging bag sealing device. Background technique [0002] In the field of packaging technology, the commonly used heat-sealing devices for plastic packaging bags can only meet the heat-sealing length of no more than 300mm. When it is necessary to heat-seal an oversized plastic packaging bag with a large amount of materials and a sealing length of more than 1000mm, the commonly used heat-sealing methods and devices cannot complete effective heat-sealing at one time. If the heat sealing knife is lengthened on the basis of the existing heat sealing method and device, when the size of the heat sealing knife is lengthened to a certain extent, it is difficult to ensure that the temperature of the sealing knife is uniform everywhere. The uneven temperature of the knife edge will cause some seals to fail or be scalded, making it impossible to achieve effective sealing. ...

AI Technical Summary

Problems solved by technology

And before the packaging bag is sealed, the opening of the packaging bag can be lifted and leveled by the bag support device, and the opening of the bag can be clamped by the sealing and leak-proof mechanism, which effectively solves the gas replacement in the packaging bag under certain special use requirements Finally, problems such as sealing failure and air leakage caused by gaps, unevenness, and wrinkles in the bag mouth

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