METHOD OF FOLDING AND SHAPING SHEET, AND APPARATUS FOR FOLDING AND SHAPING SHEET

摘要

A method of folding and shaping a sheet, by which a sheet formed with a single or a plurality of mountain-shaped folds and a single or a plurality of valley-shaped folds, the first and second folds being parallel and alternate, can be rapidly and smoothly folded and shaped, and an apparatus therefor. The method comprises the steps of supplying a sheet (1) in a naturally developed state onto a support guide (3), and applying a light pressing pressure on the sheet (1) in a direction, in which folds (10, 11) are increased in bent angles, by means of a pressing guide (6), which acts in a direction of moving toward and away from a support surface of the support guide (3) when a pair of bending tools (5a, 5b) begin to apply bending pressures on the sheet (1) or are in the course of applying bending pressures on the sheet (1) while applying bending pressures on the sheet (1) in a direction, in which the sheet (1) is bent along the respective folds (10, 11). The sheet (1) can be correctly and smoothly folded and shaped along the respective folds (10, 11).