How to effectively solve the problem of bursting Angle And bursting when Wrapping Paper And Boxes

How to effectively solve the problem of bursting Angle And bursting when Wrapping Paper And Boxes

 

Color box in the process of die cutting, bonding and packaging, the problem of explosion Angle, burst often troubled many packaging printing enterprises. Here, let's take a look at how experienced technicians handle such problems.

 

1. Improper pressure leads to bursting

 

1.1 There are foreign bodies in the indentation groove of the bottom plate, resulting in sharp increase of pressure during die cutting. This is a common cause of blowouts in production, and a destructive one. It will make the dark wire overall fracture, resulting in product obsolescence.

 

1.2 Running version, that is, die cutting version or bottom version, so that the steel line falls on the outside of the indentation groove. The burst caused by this reason is mainly concentrated on the dark line in the same direction, because the cutting knife or indentation knife is not closely matched with the wood template, and the deviation occurs under pressure.

 

1.3 The selection of steel wire thickness and indentation groove width does not match the paper material. According to the requirements of die cutting process, different steel lines should be selected for different paper, and different thickness of the bottom plate and different dark groove width, if not matched, it is easy to lead to dark line burst.

 

2, die cutting version of the production process caused by the explosion

 

2.1 When making die cutting plate, the position of steel wire is handled improperly or the steel wire is cut off with burrs. In die cutting products if there is surface treatment, such as laminating. Some burrs left on the die cutting steel line will damage the tensile strength of the surface film, and the film can not be stressed when the product is formed, it will burst.

 

2.2 Steel knife at the dark wire The steel wire has a knife edge and an interface. Because the interface is not smooth, there will be tearing phenomenon in die cutting.

 

2.3 The sponge cushion of the wire cutter will burst when the position is inappropriate, and the deformation and damage of the wire cutter will also cause the wire burst.

 

2.4 Is it reasonable to match the knife and line on the tool die? Especially in the design did not consider the thickness of the paper, the knife and the line in the joint can not effectively avoid, in the formation of interference, so that the force is too concentrated, produce a burst.

 

3. Material quality problem

 

3.1 The water content of paper is too low, and the paper becomes brittle. This phenomenon occurs more in winter, due to the cold and dry weather in winter, the relative humidity in the air is low, will directly affect the moisture content of cardboard, resulting in the cardboard fracture phenomenon after pressing line, the general moisture content of base paper is controlled in the upper limit (between 8%-14%);

 

3.2 Paper coated material bidirectional tensile polypropylene film has a slight notch, resulting in tensile strength reduction. Lamination is a more common paper surface treatment, the main material is BOPP film, if the BOPP film damage before die cutting will cause BOPP film can not be forced to burst when bending after die cutting. Film burst only occurs in the film layer, along with the force point will be extended along the direction of the burst, the bottom of the paper did not burst, which shows that it has nothing to do with the paper, such as film has not broken paper has nothing to do with the film, paper has a problem.

 

3.3 The paper faces the wrong way. In die cutting, if the indentation steel line and paper fiber direction is vertical, the paper fiber radial damage, the dark line is easy to bend, forming good, small Angle; If the indentation steel line is parallel to the direction of the paper fiber, the paper is not damaged in the transverse, the dark line is not easy to bend, the molding is rounded, the Angle is large, and the outer layer of the paper is strong and easy to break. This direction of paper has little impact on the die-cutting of single paper products, but the molding is not good, but not explosive line, but for the card mounting card products will have a greater impact, if not handled well, not only molding is not good, but also easy to explode line, mainly parallel paper grain dark line in different positions, and the other direction is not explosive line.

 

3.4 The corrugated configuration is too high. One of the influencing factors is the breakage resistance and transverse annular compression strength of base paper. If the folding resistance of the paper is too low, it will easily lead to burst.

 

3.5 The mold service time is too long. In the die cutting version after a long time of use will be loose, resulting in the die cutting process of the press knife spring, resulting in cardboard press burst. Due to the long time use of rubber pad, the uneven rubber pad caused by the burst line.