In fact, the paper bag print production molding method is very simple. I am worker in xuancai printing company now let me share some experience with you. When production paper bag china,sometimes will encounter some difficulties now let me tell you how to do easily and fastly.

Use Cardboard instead of indentation line. Making bag paper mostly quantitatively less than 250g/m2 art paper or kraft paper, etc., generally use a hand-fold last folding molding. Indentation processing, paper bags generally do not need to use the indentation line with the steel lines, but with cardboard instead of indentation line, as follows.

(1) The first die-cutting machine floor clean glue double-sided tape, and then covered with a layer of quantitative approximately 500g/m2 thick cardboard, so that it firmly glued to the base plate.

(2) Greater pressure molding, start die cutting machine cardboard indentation, thick cardboard will appear after several times the weight of the deep grooves, be careful not to cardboard fracturing.

(3) Adjust the compression pressure, load paper, press out fold traces. This crease both have a certain depth is not easy to run when the line to make the hand-folded, but not too deep, so that the paper is crushed or folded rupture, or too heavy due to the plastic deformation of the crease, leading to the bag at a later the use of easy to break, affecting life. Especially in the when kraft paper bag indentation processing, due to the kraft paper is more brittle toughness than coated paper, but also to properly grasp the molding pressure.

In order to make the bag both good discount, but not so fracturing, you need to pay attention to the following points.

(1) The pad of paper should have a sufficient thickness;

(2) molded pad of paper before the first press out the grooves;

(3) when the official molding pressure to be appropriate;

(4) along the direction of the paper, silk thread, paper, better folding, molding pressure can be smaller; perpendicular to the direction of the paper silk thread, the sheet more difficult to fold, can be locally increased molding pressure.

2 indentation in the back of the paper

Molded after folding molding, and some indentation line so that the printed side facing out folding, while some indentation line folding the printed side. Handbag most easily broken during use of the four sides of the rectangular bottom and four vertical lines, and several of these creases are printed side facing the outer folding. In order to reduce the damage caused by the bag in the folding process, the bag indentation should be used on the back indentation indentation when the steel wire and the back of the paper, contact the crease protruding to the chinese printing surface. Indentation line and recto image precise alignment, which requires the the gripper edge when printing side regulatory side should be molded gripper regulatory side, the side edges consistent.