Blanket is the intermediate carrier for indirect transfer of graphic and text in the offset printing process. It is one of the main consumables for offset printing. The quality of the blanket is directly related to the quality of the printed product. Even if it is a good quality blanket, if it is used improperly or it is not stored well, it will also affect the quality and service life of the blanket. The author's Shanghai Baoyin Company introduced the first UV six-color tinplate offset press in China. This machine requires the use of special blankets. The cost of this type of blanket is high and the amount of usage is large. Therefore, proper use and proper maintenance of the blankets are required. It is very important for production. The author wants to use this article to share the management blanket with other printing companies.
Blanket installation
1. The blanket of the blanket must be narrower than the blanket so that when the blanket is tightened by the self-locking mechanism of the machine, the blanket can be tightly wrapped on the surface of the drum to prevent the penetration of various impurities, cleaning fluid, water and other substances. Both sides of the blanket and the surface of the blanket cylinder cause problems such as rusting of the cylinder and delamination of the blanket. Our company's printing machine adopts the current popular automatic cleaning mechanism. The car wash water is sprayed from the inside to the cleaning cloth, and the cleaning cloth is brought into contact with the blanket by inflating, and then the machine is rotated to achieve the purpose of cleaning. Therefore, if the gap leaks on both sides of the blanket, it can easily cause the car wash water to infiltrate into the surface of the drum, causing corrosion of the drum.
2. When the new blanket is installed on the machine, it should be tightened first, and then check the blanket for wrinkles and air bubbles. If there is no problem after the inspection, tighten the roller after pressing the pressure several times. The new blanket has good elasticity and good stretchability. Tensile blankets should be gradually carried out. It is required that the tipping and the bite of the mouth should be performed at the same time. Do not apply tension on one side. Each time it is tense, it will be pressed for 3 to 5 minutes, so that it can be tightened several times. After the blanket has been tightened, it should also be used to strike the blanket with a finger at the mouth, and after hearing the crisp noise, it can be determined that the blanket has been tensioned. Sometimes it is too late for operators to save time by eliminating the need for inspections and confirmations, and checking for scraps after inspection.
Reprinted from: Chen Yi
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