Inner plastic bag folding and lengthening device

Abstract

The invention discloses an inner plastic bag folding and lengthening device, which comprises a first air shaft. The first air shaft passes through the central core drum of an outer paper roll and is placed on an outer paper support, a first servo motor is mounted under the outer paper support, an outer paper tension controller is mounted at the paper position of the outer paper support, a second air shaft passes through the central core drum of a rolled drum-like plastic inner bag and is placed on the drum-like plastic inner bag support, a second servo motor is mounted under the drum-like plastic inner bag support, a drum-like plastic inner bag tension controller is mounted at the paper position of the drum-like plastic inner bag support, an upper pendulum shaft is mounted on a vertical wallboard, one end of a first strip-shaped tooth is fixed on the upper pendulum shaft, and the first strip-shaped tooth is engaged with a first gear. The inventive folding and lengthening device increases the total volume of the drum-like plastic inner bag, and avoids breakage of the inner plastic bag after filling.

Description

Technical field [0001] The invention relates to the field of packaging bag manufacturing equipment, in particular to a plastic inner bag folding and lengthening device. Background technique [0002] At present, as hygiene requirements have become higher, most paper bags are required to place a cylindrical plastic inner bag to form a composite paper bag structure to avoid the disadvantages of moisture absorption, odor, and pollution after the material contacts the paper. This happens, and when traditional manufacturing equipment manufactures such paper bags lined with cylindrical plastic inner bags, they can only make the cylindrical plastic inner bag the same length as the outer paper. Moreover, if the customer requires When it is a square-bottomed composite paper bag with a square bottom, if the cylindrical plastic inner bag is the same length as the outer paper, since the overall volume of the inner bag is smaller than that of the outer paper bag, the inner bag will be stretche...

AI Technical Summary

Problems solved by technology

[0002] At present, with the increasing hygienic requirements, most paper bags are required to place a cylindrical plastic inner bag to form a composite paper bag structure, so as to avoid the disadvantages of moisture absorption, odor, pollution, etc. after the material contacts with the paper. However, when the traditional manufacturing equipment manufactures this kind of paper bag lined with a tubular plastic inner bag, it can only make the inner tubular plastic bag as long as the outer paper bag, and if the customer needs In the case of a square bottom composite paper bag with a square bottom, if the cylindrical plastic inner bag has the same length as the outer paper, since the overall volume of the inner bag is smaller than that of the outer paper bag, the inner bag will be stretched and pulled after filling the goods. Long, or the serious consequences of breaking the inner bag, resulting in packaging failure

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