Post-press processing accuracy is one of the important indicators to measure the quality of product molding. Therefore, how to improve post-press processing accuracy is particularly important. The main factors influencing the accuracy of post-press processing include: decrease in accuracy of post-press processing equipment, improper adjustment of post-press processing equipment, and paper telescopic deformation.
First, the equipment precision decline In the post-press processing equipment, automatic bronzing machine and automatic die cutting machine structure is basically the same, is divided into paper, the host and the three major parts of the paper; the working principle is basically the same, its control processing accuracy The main parts are the left and right gauges and front gauges, and the paper guide system to help locate the prints.
After a long period of use, parts of the machine are worn out, the accuracy is reduced, and the components of the paper guide system are also affected. Especially when the machine runs at a high speed and continuously for a long period of time, the damage to the gripper blade and the left and right guide wheel springs is even greater. In the case of high-speed operation for a long period of time, repeated movement of the tooth chip and the spring generates a higher temperature, causing metal fatigue. In this way, the rigidity of the dental piece and the elasticity of the spring are reduced, resulting in insufficient pressure of the gripper's gripper, which results in that the print cannot be accurately positioned in the front gauge position.
In order to prevent the accuracy of the bronzing machine and the die cutting machine from falling, it is necessary to use the equipment rationally. Never allow the machine to continuously run and run at maximum speed for 24 hours a day, and limit the factory production capacity of the machine. The unmachined product should be kept at rest; the various parts of the machine should be lubricated at ordinary times, and regular maintenance should be performed for the tooth row gripper and the guide roller spring.
Second, improper machine adjustment In the hot stamping, die-cutting process, gripper pressure is too small, can not hold the edge of the paper, in the imprinting paper slippage; Some parts of the paper transport system are misaligned, so that the paper feeding is not in place or; excessive force or the like can lead to overprinting. Therefore, when adjusting, attention should be paid to the pressure of pick-up paper and the size of pick-up paper, especially the pressure of each paper-pressing wheel of the paper-feeding system. The start-up should also pay attention to being slow to fast.
Third, paper deformation There are two kinds of paper deformation:
1. The paper is cut irregularly, with beveled or wavy edges. Therefore, it is necessary to ensure that the cut-out paper reaches a right angle and straight edge; when cutting, do not repeatedly hit the edge of the paper so as not to cause wavy edges.
2. The moisture content of the paper is not stable. Mainly in some need to heat the process, such as UV curing, screen printing drying, hot stamping heating, oil drying and so on, the paper moisture content changes. In order to avoid paper deformation caused by changes in water content, each process should be handed over in a timely manner, the detention time should not be too long, and take certain protective measures to prevent the loss of natural moisture in the paper, such as protection with a protective film. And keep the workshop temperature, humidity and paper moisture balance. The loss of paper moisture caused by the heating of special processes should be compensated by adjusting the appropriate temperature and humidity to restore the moisture content of the paper to its original standard state.
In fact, there are many reasons for the poor post-press processing accuracy. As long as we carefully pay attention to all aspects of the processing process, sum up experience, and strictly control the use of good operating techniques and techniques, we can avoid it, and thus produce qualified products and improve Production efficiency.

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