JPS6451930A - Double facer - Google Patents

Abstract

PURPOSE:To keep a quality of corrugated cardboard homogeneous by deforming a weight roll by allowing the same to follow after a deformation of a hot plate one after another, by a method wherein two sets of bearings are provided on both end parts each of a shaft of the weight roll at predetermined intervals and those bearings are pressurized reversely respectively in a vertical direction. CONSTITUTION:A double facer is deformed into a state of a recessed curved surface recessed downward as shown by a broken line A as heat of the top of a hot plate 9 is taken away according to traveling of a corrugated cardboard sheet 3. In this case, a weight roll 10' is pressurized perpendicularly and reversely at both end parts of a shaft of the weight roll 10' by actuating both pressurizing cylinders 20A, 20B. A deformation of the weight roll 10' running after that of the hot plate 9 can be given to the weight roll 10' through control of the pressurizing cylinders 20A, 20B each. Then operation is performed as deformation quantities of the hot plate and weight roll 10' by two sets of operational instruments K1, K2, and actuation control of the pressurizing cylinders 20A, 20B is completed at a point of time when the deformation of the hot plate 9 becomes equal to the deformation quantity of the weight roll 10'. Thus a uniform load is applied to the corrugated cardboard sheet in a widthward direction of the same and prevention of a paper loss such as inferior adhesion and securing of a quality of the corrugated cardboard can be performed.