Abstract: A method and a multi-platen press for the practice of the process for the manufacture of wood material boards, especially OSB boards, in which an endless mat is formed from a wood chip and binding agent mixture. The mat is introduced between the heated press platens of a multi-platen press, the press platens have steam openings directed at the mat and by steam and contact heat from press platens they are heated, pressed and cured into wood material boards. The mat, formed from a wood chip and phenolic resin mixture, is introduced into the level(s) of a single-stage or multi-stage press and deposited therein. After a light precompression, the introduction of a small amount of steam with a low steam temperature takes place through the press platens only in the cover layers of the mat. The mat is quickly compressed and cured to the end thickness of the board.

Abstract: A method and a multi-platen press for the practice of the process for the manufacture of wood material boards, especially OSB boards, in which an endless mat is formed from a wood chip and binding agent mixture. The mat is introduced between the heated press platens of a multi-platen press, the press platens have steam openings directed at the mat and by steam and contact heat from press platens they are heated, pressed and cured into wood material boards. The mat, formed from a wood chip and phenolic resin mixture, is introduced into the level(s) of a single-stage or multi-stage press and deposited therein. After a light precompression, the introduction of a small amount of steam with a low steam temperature takes place through the press platens only in the cover layers of the mat. The mat is quickly compressed and cured to the end thickness of the board.

Abstract: A method of making panel-shaped products by hot-pressing a multi-layered formed body of chips of lignocellulose-containing annual plants impregnated with an isocyanate binder, is to avoid the problem of the adhesion of the isocyanate binder. For this purpose, the cover layer material is divided into a cover layer material fine fraction (5a) and a cover layer material coarse fraction (5b), whereby the cover layer material fine fraction (5a) is pre-mixed with adhesion promoters and/or wetting agents and/or acids and/or bases, and next glued with amino and/or phenolic plastics, and the cover layer material coarse fraction (5b) is glued with isocyanate or mixtures of isocyanate and amino and/or phenolic plastics. Next, a five-layered formed body is spread, whereby the outermost cover layers of the formed body consist of the cover layer material fine fraction glued with amino and/or phenolic plastics.

Abstract: In a method of producing panel-shaped products by hot pressing a formed multi-layered body of lignocellulose-containing chips impregnated with binder, different binders are used in the middle layer and in the cover layers arranged on both sides of the middle layer, the cover layers consist of chips of wood or other raw materials based on wood impregnated with a binder including amino and/or phenolic plastics, and the middle layer consists of a mixture of chips of lignocellulose-containing annual plants chips of wood or other raw materials based on wood impregnated with a binder including an isocyanate.

Abstract: An apparatus and a method for the production of boards of ligneous material in which a mat is formed of pressed material treated with a binding agent. The mat moves continuously away from a spreading station and after introduction between the steel bands of a continuously operating hot press is cured to form a board strand by the application of pressure and heat. Immediately after leaving the hot press the hot board strand is exposed to a cooling apparatus. In this invention the two surfaces of the hot board strand are abruptly quenched and moistened with a water spray in a first cooling section which contains an evaporation zone and which is variable in length and adaptable to the thickness of the strand. The board strand is held under the pressure of multiple calendar rolls, and in a directly adjoining second cooling section, it is guided with light specific pressure through a double-belt hold-down apparatus in which the backs of the hold-down belts are sprayed with an appropriate coolant as it passes.

Abstract: A method is provided for making ligneous material boards into an endless board strand with a continuously operating press. The press includes two flexible endless steel belts which take the press material between them and carry it through the press. The steel belts thrust with friction-reducing elements against heated press plates of the press table and press ram and a cooling system that follows. The cooling system is configured as a double-belt holding apparatus with an applicable holding pressure up to a maximum of 0 to 0.05 N/mm2. A diagonal sawing apparatus, which is disposed directly behind the continuously operating press and ahead of the cooling system, divides the board strand into single boards. Several rows of coolant spray nozzles disposed on the backs of the holding belts making contact with the single boards.

Abstract: A continuously operating press for the continuous manufacture of wood material boards having a textured surface on at least one side includes: an upper frame part and a lower frame part; two endless steel belts configured to draw a mat of material through the continuously operating press and to transfer press pressure, each steel belt associated with one of the upper frame part and the lower frame part; an endless metal mesh belt associated with a corresponding one of the steel belts; an insulating tunnel associated with the metal mesh belt and the corresponding steel belt; and a heating tunnel associated with the metal mesh belt and separated from the corresponding steel belt. The metal mesh belt includes a material having a thermal conductivity substantially higher than that of the corresponding steel belt and having a thermal expansion coefficient approximately equal to that of the corresponding steel belt.

Abstract: The invention relates to a method of gluing veneers to form LVL and plywood boards from veneers laid one over the other in several layers by curing the adhesive placed between the single layers in a heated press. The invention consists in the fact that the gluing and pressing of the outer layers of a veneer pack to form LVL and plywood boards is performed by high-temperature adhesive and the inner layers by low-temperature adhesive, so that the amount of heat to be put into the veneer pack decreases from the outside in.

Abstract: A method and an apparatus for practicing the method for making ligneous material boards into an endless board strand with a continuously operating press. The press includes two flexible endless steel belts which take the press material between them and carry it through the press, are carried in rotation by drive drums and idler drums around a press table and a press ram, the steel belts thrust with friction-reducing elements against heated press plates of the press table and press ram and a cooling system that follows. The cooling system is configured as a double-belt holding apparatus with an applicable holding pressure up to a maximum of 0 to 0.05 N/mm2 and directly behind the continuously operating press and ahead of the cooling system a diagonal sawing apparatus is disposed for dividing the board strand into single boards, and on the backs of the holding belts making contact with the single boards several rows of coolant spray nozzles are disposed.