Efficacy and Analysis of Cots in Printing Design

As an important part in the printing machinery, the rubber roller plays a crucial role in the quality of the printed product. In particular, the wet alcohol system is widely used, and the rubber roller is expensive and easily damaged. How to properly use and maintain the rubber roller can make it In the printing, it is better to exert its performance and role, to ensure that the quality of the printed matter, regardless of the printer manufacturer or the user, is a problem that they are concerned about. Now I will discuss my experience in the workplace:

1 Use of rubber rollers

How to ensure the surface performance geometry when using the rubber roller, good dimensional accuracy, good workability and good stability, prevent premature roller failure caused by inadvertent use

1.1 The loading and unloading of the rubber roller When installing, the roller neck and the bearing should be guaranteed to meet certain precision requirements, and when the device is installed, it should be in the form of a heat jacket, and the temperature should be between 50 and 70. When disassembling, it should be handled with care, not to hit the roller. Neck and adhesive layer, so as not to cause damage to the roller body, bending or adhesive layer damage.

Adjustment

The pressure between each rubber roller should be appropriate. The size of the contact pressure should be determined according to the elastic hardness of the rubber roller and its role in the system. The most accurate method is to use the roller ink line method to make the roller and roller or roller and plate get The ink line method of the specified width: the water roller is moved away from the printing plate, and the fourth printing roller is in contact with the printing plate. The roller runs at a low speed, and the pressure is turned on at the same time. When the ink is evenly eaten, the ink is stopped immediately. When the ink roller is pressed against the plate, the width of the indentation is checked. Generally, the width of the indentation is 4.

The wet method of the alcohol humidifying system is a method of adjusting the pressure of the roller to make the roller and the roller or the printing plate obtain the ink line of the specified width. The other is corrected according to the water consumption, and is generally adjusted to be seen on the water roller. A thin layer of water can also be used with a feeler gauge. The force of the user's hand when using the feeler gauge should be appropriate. Carefully adjust the operation and make sure that the pressure of the glue rail is uniform at all points in the length direction. Usually it is Using a feeler gauge to perform tests at both ends and in the middle of the roller, paper strips can also be used for easy testing or pressure adjustment using a full digital set control.

use

In the course of operation, the rubber roller should maintain a good contact state, the force must be uniform, and the load should be removed during shutdown to prevent static pressure deformation.

Rubber roller maintenance and maintenance

Maintenance: Either before or after the rubber roller must be cleaned with a special cleaning agent to keep the roller surface free of dirt, to restore the surface of the ideal working conditions, such as often not clean and easy to the roller aging cleaning The agent is stored in the old cleaning water roller used in Shanghai. (1) The roller should be stored in a warehouse in a vertical or horizontal state, stored at a temperature of 10-30 in a relative humidity of 5080, or placed in a cool, dry and ventilated place. Place, (2) Can not be pressed to prevent static pressure deformation (3) Do not store acid and alkali ink solvents and sharp hard substances together to avoid corrosion and scratching of these substances (The long-term preservation of the rubber roller must be used before grinding Use because if it is stored for more than 6 months, it will produce fine cracks on the surface of the rubber roller. If there is no grinding and polishing, then the roller should not be loaded at full load immediately. Please operate it gradually. (5) Save the roller for 2 to 3 months It should be changed slightly to prevent it from bending and deforming. Also note that the exposed part of the roller must be used when it is rusted to transport. Use a strong box or put it into the frame. To avoid scratching the country, you should use plastic. And between boxes allow sufficient spare.