Card Offset Press Paper Does Not Go Smoothly Common Troubleshooting
Fault Description: Paper each nest, and still take the paper is not smooth, especially the 180 grams of white cards, other paper should be pressing to have one side of a press release to the Indian, it is difficult to see, and all Big Mexican Small Mexican business card cool no matter how long, when printed below the second side will be dirty.
Troubleshooting Walk is not smooth offset paper production process, one of the most common, if the machine debug bad or improper operation, an automatic feeding areas vulnerable to failure, will directly affect production efficiency, but often the printing process impact not only on the life of the machine down, but also very consuming ink, Paper , Printing quality is also very unstable. Therefore, ensuring the smooth take the paper work is the machine must be an important skill to master one. The writer’s work is the case for the following brief analysis and conclusion, and the majority of print workers hope to make progress together.
1, more than double Zhang Offset the production process, often appear isolated pairs of sheets separated components even more sheets of paper to lose Cardboard , Then double-sheet detector is very sensitive and if it will lead to frequent shutdowns of the feeder, double sheet detector ineffective if the pair of sheets of paper will enter the impression cylinder, and in severe damage to the machine. Produce many reasons for this failure mainly in the feeding sector debug level and paper quality.
1) paper-adhesive and shake paper does not fully
Paper in the handling and storage process, because the air between the paper will be compressed and discharged, when combined with incision of the adhesion of paper cutting, if the shaking is not sufficient on paper sheets or more prone to double-fault; printing in the overlay when the ink was dry on the paper caused by the upper and lower adhesion, excessive moisture is also easy to produce and down the paper adhesion, etc., resulting in more than one or two sheets failure.
Therefore, before the printing paper, paper that is loaded when a little hard to twist open and Chuang Qi, an appropriate reduction of water, ink supply, and control the balance of good ink.
2) set a high pile height than spring separate pieces
Spring primary role of isolated pieces of paper to control and prevent double sheets or more. If the pile set height or taller than separate pieces of paper front upturned, part of the separate pieces of paper to lose control of higher , time sheets or more easily into the double-fault. When the paper when
upturned leading edge, can be anti-knock paper processing, the flat edge of the paper; or exchange into the paper side, so that one end of the paper formed into the paper as a client. As high stacks of paper caused by the feeding failure, you can adjust the height of the appropriate test rod, so that high stacks of paper positioned on separate piece the following spring, in general, the paper stack height should be set lower than the separate pieces 4 ~ 5mm, so the role of the former hair, the most previous separate sheet of paper is just the film contacts.
3) the paper is too thin, too much suction When the offset 40g/m2
tissue below, if the suction nozzle too, are prone to double sheets or failure. As the tissue permeability, when the nozzle suck the top 1 sheet of paper, due to suction the role of Congress and the permeability of paper, also may be one or several sheets of paper following the same time suck, resulting in double sheets or more failures.
Treatment: tissue paper in the printing, the properly reduce the detection rod to increase the height of the heap and separate piece of paper the distance between; reduce the amount of hair to prevent excessive tissue Jumping; reduce the amount of suction to reduce the separation suction; adjustment of the spring location separate pieces so that it inserted into the pile to increase the distance between front of some, give full play to the role of its control.
4) paper with a static Paper is produced with electrostatic or more pairs of one of the main sheets. The generation of static electricity caused by friction, paper in papermaking, handling and storage process, particularly in the press on the transport process , is inevitable friction between the paper surface, so the paper is inevitable with static. with electrostatic paper would appeal to other paper, when the paper when static electricity will increase to some extent caused by feeding failure. Way to eliminate static electricity
paper is mainly to change the static conditions, where appropriate, increase the operating environment of relative humidity. Therefore, the installation of humidity in the room, air ionization equipment, or ground spraying water on the ground, to make such paper can be conditioned for the purpose of eliminating electrostatic paper. In addition, the paper before printing on the machine more than loose paper to minimize static electricity on the adverse effects of auto-feeding.
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