In order to ensure the stable work of the gripper structure in the offset press, it is necessary to pay attention to the design, production and protection of the gripper structure. Understand the factors that ensure the stability of the crepe paper, which can help the industry to understand the structure of the crepe paper and respond well to the problems of printing production.
The main factors affecting the stability of the gripper in the offset press are:
1. How to place the gripper. During the printing process of the offset press, the grippers on the impression cylinder must completely hold the ends of the paper. In order to meet this requirement, the grippers on the impression cylinder need to be placed neatly. Because in the offset press, it is better to hold the two ends of the paper than to hold the bottom of the paper, so make sure that both ends of the paper along the axial direction of the impression cylinder are held securely by the gripper. When you regularly check the status of the gripper in the offset press, you should also check to see if there is a hidden tooth.
2. The number of grippers. The number of grippers is one of the factors to consider during the design of the offset gripper structure. The determination of the number of grippers is more complicated. In general, the larger the width of the offset press, the greater the number of grippers. At the same time, the thinner the paper, the lower the stiffness, and the more paper picks it needs.
3. The contact area between the gripper and the tooth pad. During the installation and commissioning of the offset paper structure, it is also necessary to ensure a certain contact area between the gripper and the dental pad. If the contact area of ​​the two is unqualified, the stress on the contact surface of the dental pad and the crepe paper will increase, which will easily damage the paper, and will easily aggravate the wear between the dental pad and the crepe paper, and finally cause the overprint to be banned. Quality problems such as ghosting appear.
When timing protection of the offset press, it is necessary to carefully check whether the contact area between the gripper and the pad is satisfactory. At the same time, the work of flat teeth should be done to ensure that the front end of the gripper is more tightly contacted than the root. In the future, even if the gripper in the offset press is slightly deformed after being subjected to the impact force during the work, the influence on the force is not too great, and the service life of the gripper is relatively extended.
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