US 5,097,596 A · Supercalender roll and method of making same

Abstract

A filled supercalender roll is characterized by a plurality of resin impregnated discs that are carried side-by-side on a shaft and form a homogeneous roll body. To make the supercalender roll, a web of woven or nonwoven fibrous material is immersed in and carried through a vat of thermosetting resin to saturate the web with the resin. The resin saturated web is then transported through an oven to partially cure the resin to the B stage, after which the web is cut into a plurality of the discs. The discs are placed side-by-side on the shaft and a collapsible oven is assembled around the discs. The discs are then axially compressed while being heated within the oven to fully cure the resin to the C stage, during which time the collapsible oven decreases in length in accordance with a decrease in the axial length of the axially compressed discs on the shaft as the resin cures. Upon completion of curing of the resin, the discs are fused together and form the homogeneous roll body, which is then finish machined to provide a smooth cylindrical surface on the supercalender roll.

Claims32

Dependent claims

A method of making a supercalender roll, comprising the sequential steps of providing a plurality of fiber discs, each disc having an axial opening and being saturated with a resin that is not fully cured, in side-by-side relationship on a shaft with the shaft extending through the axial openings;

axially compressing the discs on the shaft;
curing the resin while the discs are maintained axially compressed on the shaft to fuse the discs together to form a substantially homogeneous roll body;
and imparting a smooth outer cylindrical surface to the roll body.

A method of making a supercalender roll, comprising the steps of providing a plurality of fiber discs saturated with a partially cured thermosetting resin, each disc having an axial opening;

assembling a first roll head and a first locking nut on one end of a roll core shaft;
loading a plurality of the discs onto the opposite end of the shaft with the shaft extending through the axial openings in the discs, to place the discs in side-by-side relationship on the shaft;
assembling a second roll head onto the opposite end of the shaft;
assembling an oven around the discs on the shaft;
forcefully urging the first and second roll heads relative to and toward each other to axially compress the discs on the shaft and between the roll heads;
operating the oven to heat the discs while the discs are axially compressed on the shaft to fully cure the resin saturating the discs and fuse the discs together to form a substantially homogeneous roll body on and bonded to the shaft;
after completion of curing of the resin, assembling a second locking nut on the opposite end of the shaft to maintain the roll body axially compressed between the first and second roll heads;
and imparting a smooth outer cylindrical surface to the roll body.

5 more elements

Dependencies are inferred from the claim text.

Supercalender roll and method of making same

Life of this patent

Supercalender roll and method of making same

Life of this patent

Abstract

Claims32