DEVICE AND METHOD FOR PREVENTING WARPING OF DOUBLE-FACED CORRUGATED CARDBOARD SHEET AND MANUFACTURING APPARATUS FOR DOUBLE-FACED CORRUGATED CARDBOARD SHEET

摘要

The present invention effectively prevents warping that occurs in double-faced corrugated cardboard sheets. That is, the device for preventing warping of double-faced corrugated cardboard sheets is provided with: a conveyance section (2) for bringing a belt (34) into contact with the upper surface of a single-faced corrugated cardboard sheet (D) while moving the belt (34) in a specified direction when manufacturing a double-faced corrugated cardboard sheet (E) by gluing the single-faced corrugated cardboard sheet (D), which is obtained from a corrugated medium (B) and a single facer side liner (C), to a double facer side liner (A); a heating section (3), which is provided below the conveyance section (2) and contacts the lower surface of the double facer side liner (A); multiple pressing units (4), which are disposed in the belt (34) movement direction and the width direction that is orthogonal to said movement direction and which apply pressing forces toward the heating section (3) through the belt (34) of the conveyance section (2); and a control unit (5) for controlling the pressing units (4) so that the assignment of pressing forces in the width direction differs between the upstream side and the downstream side of the belt (34) movement direction.