Offset printing process chain fault analysis
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Since the various bills, forms, books and magazines printed on the offset press have different requirements on the paper, the size, thickness and thickness are different. It is necessary to adjust the machine for different papers. The following examples are analyzed:
In the recent work of printing bills, it was found that there was such a phenomenon: every time there was a fixed speed printing, there was an empty phenomenon. These dropped papers are stained with oil in the machine and can no longer be used, and affect the normal paper passing behind. At first, I thought it was caused by the instability of Feida paper or the failure of the double controller. However, it was observed that Feida's partial paper feeding and crepe paper were very stable and normal.
Go back and continue to check the chain fangs. All the chain fangs are numbered one by one, and the white ink is used to mark the numbers on the "glasses case" on both sides of the chain squeegee in order, and the normal printing starts. After careful observation, it is very regular, always in the third row. Empty Zhang. After parking, the third row of chain fangs was moved to check, and it was found that the row of fasteners had little contact with the dental pads and the force was small, and some of the dental pads were more worn. In this way, the paper will be stable, and the paper drop phenomenon will occur naturally during the high-speed operation of the machine.
The shutdown is carefully and carefully repaired one by one, and the adjustment of the force is adjusted, and the replacement of the tooth pad is replaced with a new one. After such adjustments, the fault was completely ruled out.