Patent ID: 6054081
Filing Date: 2000-04-25
Classification: B27N

Abstract:
A process for the continuous production of boards of wood-based material cured by heat and pressure, comprising the steps of:forming with a scattering station, on a continuously moving scattering belt, a scattering thickness of a pressed material mat comprising a binder mixed with at least one of chips and fibers, the binder having a polymerization temperature, and the pressed material mat being at ambient temperature and having an initial moisture content;preforming the pressed material mat between the scattering station and a main pressing region, said preforming including precompacting the pressed material mat to between 90% and 60% of the scattering thickness, preheating and moisture conditioning the precompacted pressed material mat to a temperature within 35.degree. C. below the binder polymerization temperature, and compacting the precompacted, preheated and moisture conditioned pressed material mat to approximately 35% of the scattering thickness; andfinish-forming the preformed pressed material mat in the main pressing region with concurrent application of pressure for finish-compacting the pressed material mat to approximately 5% of the scattering thickness and heat to at least the binder polymerization temperature.