2002 Volume 42 Issue 9 Pages 1000-1004
The authors propose a new method for continuous spreading of long materials based on cross rolling method in this paper. The scheme of the new method is simple and it may be industrialized with high yield efficiency and productivity. Its equipment consists of a flat platen and a roll. The idle roll may be mounted on linear bearings, and reversingly travels over the material width along the transverse direction. The roll axis is slightly tilted to few degrees against the horizontal plane, so the roll gap decreases towards downstream. The material is fed consecutively by some constant length. The thickness of material is reduced in the gap between the platen and the travelling roll. The material is widened gradually downstream. The rapid repetition of these operations realizes virtually continuous spreading of long materials. With the plasticine clay as a model material, the effectiveness of this method is investigated. In the case of the 20% reduction of 2.5 mm thick and 60 mm wide plasticine strip, the achievable lateral spread is approximately 20%. Although the lateral spread increases with the reduction, the edge waves occur when the reduction is greater than 20%.
