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Overview of Corrugated Cardboard Production Process
Overview of Corrugated Cardboard Production Process
A corrugator is a set of machines designed to bring together three, five or seven sheets of paper to form single, double or triple wall board in a continuous process.
Corrugating the flutes and gluing to a single liner
Gluing the outside liner to make a rigid board
Cutting the board to the desired size
Three sheets of paper (containerboard) are unrolled simultaneously on the corrugator: the inner liner, the outer liner and in the middle, the medium (also called fluting).
The medium sheet is given a "wave". This corrugation is obtained by pressing the sheet under heat through grooved metal rolls. This operation gives the paper its fluted shape in the single facer.
Starch is applied to the tips of the flutes on one side, the outer liner and the inner liner are glued to the tips of the corrugated medium sheet of paper from the outer and the inner side respectively.
The Corrugated board comes out of the corrugator as a flat board sheet.