Identify the failure of Heideberg printing machine according to the phenomenon

First of all, there is a clear understanding of it. This problem looks like anything, it is different from other issues; second, it should also understand what is caused by these reasons. The problems described below have a common point: a problem that the eye or can be observed by the microscope. Typically, the problem is divided into two categories: the error of the graphic and the error of the graphic area. An error in the edge of the graphic is that the edge of the graph is inconsistent with the original, and the error of the graphic area is the problem of the surface surface. (Note: The problems in screen printing are not limited to these two categories. The registration logs, adjustment ink, and post-processes have an impact on printing quality.) Generally there are four features to be used to graphic issues Perform identification, comparison, and classification, as follows:

position

In terms of continuous prints, the problem occurs relative to the entire graphic. If the location is displayed is \"Same \" (the same), then the problem always appears in the same place. Other possible situations are \"VariousPosition \" (different positions) or outside the print area, or close to (inaccurate).

direction

The problem is a position relative to the printed variable. For example, when the angle between the image and the mesh line is 1 ° ~ 10 ° or 80 ° ~ 89 °, the saw tooth is most obvious. The direction also refers to the direction of scratch scratches, scraping lengths, and image edges.

size

It is pointed out that the problem with the size of the qualified printed product. For example, the dirt will make the image becomes large, while the edge loss will make the image becomes smaller. When the image change in the print is not regular, you can fill in \"random \" in the table.

frequency

The frequency of the problem appears in the print. Some problems have always existed, such as returning; some problems occasionally, such as ink; and some problems have emerged in a few prints, and then disappeared, at this time, they can fill in the table.\" These four feature explains why solve the failure than after the printing process is solved. Unfortunately, it is difficult to confirm the problem and solve it if the print person does not understand the differences between defects. In addition to the above four features, each fault has one or more feature easy to identify.

In summary, the Haidurg printing machine can be divided into two parts: image edge defects and image area defects. Image edge defects refers to the edges of the edges that are not accurately replicated; image area defects are all problems that are covered by printed appearance or ink. To clearly describe the problem, you must first know the recognized standard: position, direction, size, and frequency.