Patent ID: 7393480
Filing Date: 2008-07-01
Classification: B27N

Abstract:
1. A method for the continuous manufacture of wood material boards having a textured surface on at least one side, comprising the steps of: forming a mat of a wood or lignocellulose-containing material, treated with a binding agent, onto a continuously moving conveyor belt; introducing the mat between steel belts each circulating around one of an upper and lower frame part of a continuously operating press; and after the step of introducing the mat, curing the mat in the continuously operating press to form one of a strand of boards and an endless wood material board by applying pressure and heat to the mat, wherein the continuously operating press comprises at least one endless metal mesh belt configured to circulate with a corresponding one of said steel belts, wherein the metal mesh belt comprises a material having a thermal conductivity considerably higher than that of the corresponding steel belt and having a thermal expansion coefficient approximately equal to that of the corresponding steel belt, wherein the metal mesh belt and the corresponding steel belt are configured to pass through an insulating tunnel, in a return run, to reduce heat loss by thermal radiation, wherein the metal mesh belt is configured to pass through a heating tunnel, which is separated from the corresponding steel belt, wherein the heating tunnel is configured to heat the metal mesh belt to a temperature that is higher than a temperature of the corresponding steel belt by at least 40° C., and wherein curing the mat comprises applying a specific pressure to the mat of at least 0.3 N/mm2 during a first at least 80% of a pressing time.