VERFAHREN ZUM HERSTELLEN VON FORMKOERPERN, INSBESONDERE VON PLATTEN

摘要

A method of manufacturing shaped bodies, in particular boards out of gypsum, water or hydration and comminuted fibers containing lignocellulose and/or cellulose is described in which all components are combined into a single starting mixture and at least one water saturated, ground-moist, light aggregate is dispersed in this mixture as a fixed pore former. From this starting mixture there is formed a mat which is built up symmetrically in cross-section by directing gas streams from opposite directions onto the mixture as it falls onto a moving belt wherein the light aggregates are located in the central layer. This mat which is built up symmetrically in cross-section is pressed while supplying heat. The aggregate is perlite, pumice or nemiculite and water soluble starch may be premixed with the gypsum to act as binder.