公开(公告)号：US5252185A

公开(公告)日：1993-10-12

申请号：US882219

申请日：1992-05-13

申请人： Eric R. Ellis ,  Fred J. Ferrari ,  Gregory H. Hale ,  Joyce H. Anderson ,  Kenneth B. Jewett ,  John A. Mattor ,  Abbott W. Mosher ,  John O. H. Peterson ,  Douglas A. Quist

发明人： Eric R. Ellis ,  Fred J. Ferrari ,  Gregory H. Hale ,  Joyce H. Anderson ,  Kenneth B. Jewett ,  John A. Mattor ,  Abbott W. Mosher ,  John O. H. Peterson ,  Douglas A. Quist

IPC分类号： D21G1/00 ,  D21G1/02 ,  F16C13/00

CPC分类号： D21G1/0266 ,  D21G1/00 ,  D21G1/0246 ,  F16C13/00

摘要： Disclosed is a new internally heated calendering roll capable of finishing paper satisfactorily at the temperatures, heat loads and pressures required for substrata thermal molding. The roll is internally heated and has a circumferential wall at least 4 inches thick. It includes means to provide heat into the interior of the circumferential wall to be conducted through the wall to the outer surface for heating the paper web being calendered by the roll. The roll is constructed of a first material with a thin circumferential surface layer of a second, cermet or ceramic containing material. The surface layer material has a hardness of at least 530 Vickers and a thickness of between .003 inch and .030 inches. It is capable of being polished to a roughness of less than 6 micro inches Ra. The roll has uniformly spaced conduits for passing heated fluid located no more than 2 inches from the outer edge of the conduits to the circumferential surface. The roll is capable of conducting at least 8,500 BTU/Sq. Ft./Hr. heat through the roll without creating tensile hoop stress in excess of 1/2 of the yield strength of the first material.

摘要翻译： 公开了一种新的内部加热压延辊，其能够在基体热成型所需的温度，热负荷和压力下令人满意地完成纸张。 辊被内部加热并且具有至少4英寸厚的圆周壁。 它包括将热量提供到周壁的内部以将其通过壁传导到外表面的装置，用于加热由辊压延的纸幅。 辊由具有第二金属陶瓷或含陶瓷材料的薄的周向表面层的第一材料构成。 表层材料具有至少530维氏硬度和0.003英寸至0.030英寸之间的厚度。 它能够被抛光到小于6微英寸Ra的粗糙度。 辊具有均匀间隔的导管，用于将不同于管道外边缘不超过2英寸的加热流体通向周向表面。 该辊能够进行至少8,500 BTU / Sq。 Ft./Hr。 通过辊而不产生超过第一材料的屈服强度的1/2的拉伸环箍应力。