초록 ▼

The production of wood material particles into board or panels, such as chipboard, fiberboard, OSB panels, MDF panels and the like, involves coating the particles with a binder free of any hardener. The coated particles are deposited on a support surface in the form of a mat and then are compressed.

The production of wood material particles into board or panels, such as chipboard, fiberboard, OSB panels, MDF panels and the like, involves coating the particles with a binder free of any hardener. The coated particles are deposited on a support surface in the form of a mat and then are compressed. While the particles are being compressed in a press, an acid or basic hardener in a gaseous phase or in a binary phase with a gaseous carrier agent, is introduced across and into the surface of the mat or directly into the interior mat. The compression of the mat can be performed either in a continuous double band press or a discontinuous single or multi-platen press. In a double band press, two press bands are arranged in opposed relation and the hardener is introduced into the mat in a wedge-shaped inlet zone between the press bands. The hardener flows through openings in the press band onto the surface of the mat. Conduits are located in pressure plates associated with the press and bores extend from the conduits to the pressure plate surfaces in contact with the mat.

대표청구항 ▼

Method of continuously producing processed wood material board or panels, including chipboard, fiberboard, OSB panels, and MDF panels, including using a binder resin for coating the wood material particles, with the binder including urea resins, melamine resins and phenol-formaldehyde resins, and ac

Method of continuously producing processed wood material board or panels, including chipboard, fiberboard, OSB panels, and MDF panels, including using a binder resin for coating the wood material particles, with the binder including urea resins, melamine resins and phenol-formaldehyde resins, and accelerating curing the resin coated wood particles by applying a hardener, and including the steps of spreading the wood particle material coated with the binder on a support surface and forming a mat of the material, conveying the mat into a continuously operating double-band press and gradually compacting the mat of material at an inlet to the press for reducing mat thickness and maintaining pressure on the mat while it hardens, wherein the improvement comprises coating the wood particle material with a hardener-free resin, and introducing the hardener as an acid hardener or a basic hardener in a gaseous phase or a binary phase with a gaseous carrier agent, across and onto the surface of the mat or directly into the interior of the material forming the mat as the mat is gradually compacted at the inlet into the double-band press.