Press roll

The utility model discloses a press roll, it is linear shrinkage from the middle part to both ends along the axial describes, and the press roll sets up to the middle part symmetry of both ends contraction section for the press roll from the middle part, and just the diameter in the middle part of this press roll both ends equal diameter and the press roll is greater than the diameter at the press roll both ends. The press roll can effectively prevent because the feed says that there are one gradient difference in the temperature of both sides and the temperature at middle part when the calendering to and because the raw materials receives the influence in feed way walking orientation, and the thin both sides in the panel that leads to the fact middle part are thick, the roughness of panel has been guaranteed. Thereby, reduced follow -up flattening polishing treatment's work load, also saved raw and other materials, reduced manufacturing cost.