Double facer for use in corrugated fiberboard sheet manufacturing system

摘要

A double facer for use in a corrugated fiberboard sheet manufacturing system wherein a moisture content of a double faced corrugated fiberboard sheet is set at an optimum value at all times for stably producing the double faced corrugated fiberboard sheet with less bonding failure and less warp. The double facer comprises moisture content detecting means for detecting a moisture content of the double faced corrugated fiberboard sheet after passed through the heating means or for detecting a parameter correlating with the moisture content, and a control means for controlling a heat reception quantity of the double faced corrugated fiberboard sheet on the basis of a detection result from the moisture content detecting means so that the moisture content of the double faced corrugated fiberboard sheet approaches a predetermined optimum moisture content.