Cut-off device and method for plastic composite packaging bag bag-making

Abstract

The invention discloses a cut-off device and method for plastic composite packaging bag bag-making, which solves the problem that conventional plastic bag cutting damages a tool and is not adaptive tothe tool, and has the effects of improving the production efficiency and reducing the production cost. According to the technical scheme adopted by the invention, the cut-off device comprises an upper convex mould and a lower concave mould, wherein the upper convex mould is matched with the lower concave mould; the upper convex mould is assembled with a positive gas pump and a negative gas pump to provide power; the positive gas pump and the negative gas pump are connected with a compressed air tube; the compressed air tube is connected with a solenoid valve integrally controlled by a bag-making machine; and the two ends of the upper convex mould are equipped with guide columns in the vertical direction for fixing an operation direction of a die cutter.

Description

Technical field [0001] The invention relates to the technical field of packaging bag production, in particular to a plastic composite packaging bag making and cutting device and method. Background technique [0002] In the automatic bag-making technology of plastic composite packaging bags, when the bag-making machine cuts the heat-sealed packaging bags, the cutting knife will always have a cutting deviation relative to the seams with different patterns on both sides, regardless of the direction of the seam. Side, will affect the beauty and quality of the bag. [0003] At present, the usual solution is that the bag-making machine manufacturer is equipped with a "double cutter" on the bag-making machine. The cutting gap between the two cutters is 1.5-2mm, and the seam of the pattern is pushed between the two cutters. Cut off to eliminate the influence of seams on the quality of the bag. The problems with this solution are: [0004] 1) Two cuts per cut will cause slower vehicle spee...

AI Technical Summary

Problems solved by technology

[0004] 1) Two cuts per cut will result in slower speed and lower work efficiency;

[0005] 2) The wear frequency of the "double cutter" is doubled. The worn cutter can cut into burrs if it is light, and it will be easily damaged when it is heavy. The cost of the original equipment is high, which increases the production cost, especially the plastic bags produced by our company are composite The material is generally thicker, and there are a large number of materials composited with aluminum foil, and its punching effect is obviously better than that of "double cutter";

[0006] 3) The "double cutter" has a narrow application area. The "double cutter" equipped by the original factory can only be used on a fixed machine and cannot be installed on other machines. When other machines that produce different bag types or multiple machines Production is limited when the seam cutting problem needs to be solved

Motor drive is used to achieve reciprocating motion, and the overall device is relatively complicated. The bag body cannot be pressed and positioned well when placed on the base, and the bag body is prone to position deviation, resulting in inaccurate cutting and high scrap rate.

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