Chiavari Chair,Tiffany Chair,Resin Tiffany Chair Yongye Furniture Co., Ltd. , http://www.yongyechair.com
Failure phenomenon 1. Rely on the version of the water roller bracket.
2. The impact sounds louder during the operation of the machine.
3. The plate's resistance to printing forces has decreased.
4. Prints are dirty.
Negative effects 1. Uneven supply of water, ink imbalance, printing products with dirty, coupled with the shorter type of ink path, ink ink saturation is not enough, prone to "gray, flat, light" phenomenon.
2. Because of the runoff of the plate roller bracket, there is a large medium strike force. Therefore, the machine speed cannot reach the set operating speed, resulting in the waste of equipment potential. At the same time, it can easily cause damage to other components, which in turn affects the overall printing accuracy of the machine.
3 Because of the fluctuation of the plate roller support, the surface of the plate cylinder has a large impact force, which can easily cause the printing plate to lose its strength. The resistance to printing force is obviously reduced. Especially, the resistance of the cable version will be lower, and printing will increase. cost.
4. Due to uneven water supply, it is easy to cause unbalanced paper expansion and contraction, affecting the accuracy of overprinting, which brings certain difficulties to the printing of fine prints.
Failure Analysis and Solution 1. Relies on the version of water roller bracket combination is composed of two fastening bolts, an adjusting screw with several pieces of butterfly reeds, two copper eccentric worm gears and a set of brackets and other components, including any one fastening component. The looseness or wear of the copper sleeve and the eccentric worm gear may cause the bracket to jump.
2. One by one, check all parts of the water roller bracket combination and repair worn parts. replace. After careful inspection and analysis, we determined that 008F21853. 008F21 7530, 008G282230 has worn out, and the support hole with 008G282230 is out of round, and 092G771840 elasticity has failed.
3. Since the checking and disassembling process of the plate support water roller bracket combination of the operation surface and the transmission surface is complex and there are many parts to be disassembled and assembled, it is necessary to be fully prepared for the technical difficulty in the maintenance process.
Maintenance process 1. Refining the positioning holes that have become obsolete with a fixed wall plate. Since this hole is a blind hole, it can be repaired with a straight reamer. The specific dimensions may depend on the wear conditions.
2. The out-of-round positioning support shaft 008G282230 is surface-treated to restore its original function.
3. Replace worn parts (008F 21, 53, 008F21, 7530, 091F1, 54140, 092G771840).
Maintenance effect 1. The phenomenon of bouncing on the plate roller bracket has been fundamentally solved.
2. The dirtiness of the product during the printing process has been completely improved.
3. The printing plate's resistance to printing has increased significantly.
4. Product quality has improved.
Experience of overhauling water roller bracket
At the end of 1997, the company introduced a new manroland four-color offset press R7043B, which has been put into production for more than six years and has a total output of 160 million sheets. However, recently, the phenomenon of bouncing by the plate roller bracket is serious, which brings many difficulties to normal printing. It is understood that the user's equipment failure is generally manned by the company's office in China to undertake maintenance tasks, the implementation of a complete set of bracket replacement, but its maintenance costs are relatively expensive. Let's talk about some of our experiences in the maintenance and repair process.