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Home » News » Blog » Knowledge Base » 3 Factors Affecting The Accuracy of Post-press Processing

3 Factors Affecting The Accuracy of Post-press Processing

Views: 0     Author: CNECO     Publish Time: 2022-11-19      Origin: Site

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Post-press processing technology, along with the progress of printing technology and the continuous improvement of printing quality needs. It has shown a continuous trend of creating new hot spots. Which is crucial for the world’s printing enterprises to achieve transformation through technological innovation. And it is important to maintain the sustainable and healthy development of printing enterprises.

Post-press processing accuracy is one of the important indicators of product quality. So it is especially important to improve the accuracy of post-press processing. The main factors affecting the accuracy of post-press processing are post-press processing equipment precision decline, post-press processing equipment improperly adjusted, paper stretching deformation, etc.

Next, to share with you the three main factors affecting the accuracy of post-press processing.

01 Equipment precision decline

In the post-press processing equipment, the automatic hot stamping machine and automatic die-cutting machine structure are basically the same. Mainly divided into three major parts of the paper feed, host, and paper collection. The working principle is also basically the same, the main parts of its control processing accuracy are the left and right gauge position and front gauge, as well as to help the positioning of the printed paper guide system.

After a long period of use, the machine parts wear, the precision decreases, and the components of the paper guide system are also affected. Especially the machine running at high speed and long continuous operation. The gripper teeth row of teeth and the left and right gauge position of the paper guide wheel spring were damaged more. In the case of high-speed operation for a long time, the teeth and springs repeated movement will generate higher temperatures, resulting in metal fatigue. Thus, the steel of the teeth and spring elasticity decline, resulting in the gripper teeth gripper pressure is not enough. Resulting in the print in the front gauge position can not be accurately positioned.

3 Factors Affecting The Accuracy of Post-press Processing
3 Factors Affecting The Accuracy of Post-press Processing

To avoid stamping machines, die-cutting machine precision decline caused by inaccurate overprinting, should be a reasonable use of equipment. Do not let the machine 24 hours a day continuous non-stop operation and extreme speed operation, to the machine’s factory capacity settings to limit the speed. When not processing products should let the machine remain stationary. Usually should be lubricated machine parts, the tooth row gripper teeth, and a paper guide wheel spring for regular maintenance.

02 Improper adjustment of the machine

In the stamping, die-cutting process, gripper paper teeth gripper paper pressure is too small, the gripper paper edge, in the embossing paper slip. Handing paper teeth and gripper teeth open and close action dysfunctional, some parts of the paper delivery system dysfunctional. So that the paper delivery is not in place or; in the force is excessive, etc. will lead to inaccurate overprinting. So in the adjustment should pay attention to the gripper pressure and the size of the gripper paper. Especially the pressure of the paper delivery system of the pressure wheel, the start should also pay attention to the slow to fast.

03 Paper deformation

Paper deformation of two kinds of situations.

1. paper cutting is not standardized, there is a beveled edge or wavy paper edge. Therefore, you must ensure that the cut paper to reach the right angle, a straight edge. Cutting does not repeatedly knock the edge of the paper, so as not to cause a wavy paper edge.

2. Paper moisture content is not stable. Mainly in some processes that require heating, such as UV curing, screen printing drying, hot stamping heating, over-oil drying, etc., the paper moisture content changes. To avoid changes in water content caused by paper deformation, each process should be timely handover. And the lag time should not be too long. While taking certain protective measures to prevent the natural loss of paper moisture. Such as protection with protective film for protection. And keep the workshop temperature, humidity, and paper moisture content balanced. For special processes caused by heating paper moisture loss, should be adjusted by temperature and humidity to compensate for the appropriate amount. So that the paper moisture content is back to the original standard state.

There are many reasons that cause poor post-press processing accuracy. As long as we pay careful attention to the various aspects of the processing process, sum up experience, strict operation technology, and process technology, can be avoided. Many orders have defects most of them are caused by the details of the problem did not pay attention to. For the details of the focus and process on the high requirements of the practice is very necessary. To create a qualified product, to Reduce product loss rate, improve production efficiency. And slightly better in production and quality control.

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