Leveling device for bag making machine

Abstract

The invention discloses a leveling device for a bag making machine. An upright rod is vertically arranged on a horizontal panel of a side frame of a rack; a slide block is sleeved on the upright rod and fixed on the upright rod through adjusting bolts; a balance sliding rod passes through the slide block and is parallel to the horizontal panel of the side frame of the rack; a fixed block is connected to the end of the balance sliding rod which is near a middle envelop roller; the fixed block is connected with a leveling plate through a connecting rod, wherein the surface of the leveling plateis directly and flatly pressed on the surface of a bag; and the leveling plate is arranged between a middle envelop spinning die head and the middle envelop roller. In the invention, the leveling plate with the length approaching to the width of the surface of the bag is arranged between the middle envelop spinning die head and the middle envelop roller, therefore, the controlled area of the surface of the bag is increased, and the leveling pressure borne by the surface of the bag is uniform; the pressure of the leveling plate to the surface of the bag can be adjusted through the adjusting bolts, so that a better leveling effect is achieved; and the device is subjected to internal test by an enterprise to ensure that the phenomenon of exposure or infirm adhesion of a middle envelop due tolow evenness of the traditional equipment is avoided and the product percent of pass is greatly increased.

Description

technical field [0001] The invention relates to the field of paper bag and paper-plastic bag making equipment, in particular to a flattening device for middle-sealed paper-plastic bags after spinning and before middle sealing. Background technique [0002] Center-sealed packaging bags, especially paper-plastic bags with a center seal (the outer layer is paper and the inner layer is woven cloth), are sealed by the center-seal roller after being folded and pressed by wheels and rollers, and then enter the cutting process. The bag body is cut into independent finished packaging bags. In order to improve the fastness and flatness of the middle seal, the preliminarily formed bag body needs to be rolled before entering the middle seal roller. The existing flattening and rolling method is before the middle seal. Rollers are set on the bag body, and the wrinkles on the surface of the bag body after folding and forming are corrected by roller rolling. Because the contact surface betw...

AI Technical Summary

Problems solved by technology

[0002] Center-sealed packaging bags, especially paper-plastic bags with a center seal (the outer layer is paper and the inner layer is woven cloth), are sealed by the center-seal roller after being folded and pressed by wheels and rollers, and then enter the cutting process. The bag body is cut into independent finished packaging bags. In order to improve the fastness and flatness of the middle seal, the preliminarily formed bag body needs to be rolled before entering the middle seal roller. The existing flattening and rolling method is before the middle seal. Rollers are set on the bag body, and the wrinkles on the surface of the bag body after folding and forming are corrected by roller rolling. Because the contact surface between the roller wheel and the bag body is small, the force on the bag surface is uneven, and the flatness is not smooth after rolling. Ideally, after the center seal spinneret is rolled by the center seal roller, the flatness of the bag body is not high, and the upper and lower edges are not completely aligned, resulting in the phenomenon that the center seal is white and the adhesion is not strong after the center seal, which is serious Affect the product qualification rate

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