Mold and method for machining reverse folding line between upper cover and lower cover of packaging box

Abstract

The invention relates to a mold and a method for machining a reverse folding line between an upper cover and a lower cover of a packaging box. According to the mold for machining the reverse folding line between the upper cover and the lower cover of the packaging box, a knife edge extending along the length direction of a groove is arranged in the middle of the bottom surface of the groove of a bottom mold, when an upper pressing mold moves downwards, the pressure applying surface is tightly pressed toward the top of the knife edge, so that when the reverse folding line is machined on unfolding paper of the packaging box, the pressure applying surface and the knife edge are tightly pressed from the two sides of the reverse folding line on the unfolded paper, so that a deeper indentation is machined in the middle part of the reverse folding line, so that the opening degree of the upper cover of the manufactured packaging box is larger, due to the fact that the contact area between theknife edge and the unfolded paper is small, the pressure between the upper press mold and the bottom mold does not need to be improved, therefore, the indentation of the unfolded paper cannot be easily damaged by pressing and a white bottom cannot be easily exposed.

Description

technical field [0001] The invention relates to a mold and a method for processing an inversion line between the upper and lower covers of a packaging box, in particular to a mold and a method for processing an inversion line between the upper and lower covers of a cigarette box. Background technique [0002] The upper and lower covers of some packaging boxes are connected together, and there is a crease line between the upper cover and the lower cover, which is usually called a reverse folding line. When the upper cover is turned up relative to the lower cover, the upper cover is turned around Polyline rotation. For example, there is also a reflex line between the lid and the box body of the hard shell cigarette box. In a general cigarette case, if the indentation is not deep when processing the anti-folding line, the upper cover of the cigarette case cannot be turned over at a relatively large angle or even 180 degrees relative to the upper cover, and generally can only b...

AI Technical Summary

Problems solved by technology

Since the upper cover cannot be fully opened, it is inconvenient to put or take out objects such as cigarettes in the cigarette box, and the upper cover will have a tendency to rebound when it is closed, which will affect the insertion or removal of objects

If the indentation of the anti-fold line is processed deeper, it is easy to damage the plated pattern or color on the part of the anti-fold line on the packaging box, exposing the white background and affecting the appearance of the cigarette box

Therefore, the mold for processing the anti-fold line in the prior art cannot produce a high-quality cigarette case that can make the upper cover turn over a larger angle

Images