Mechanical Property and Structure Improvement of Sleeve Mandrel in Central Impression Flexographic Press

摘要

The sleeve mandrel is the core element of the plate cylinder in the central impression flexographic press. It is a cantilever beam structure during the installation of the sleeve. So a large deflection appears at the free end of the mandrel under the force of self weight because of the larger span of the mandrel. The stress and deflection analysis are carried on firstly. Based on the static analysis, the structure optimization is developed to satisfy the low deflection requirement. The carbon fiber material is used to replace the material of the mandrel body. Then the mass and maximum deflection of the mandrel is greatly reduced after the optimization. So the mandrel is easy to replace and the dynamic characteristics will be better.