Process for producing durable products

B - Operations – Transporting – 27 – K

Patent

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Details

B27K 5/06 (2006.01) B27K 5/00 (2006.01)

Patent

CA 2408661

The present invention relates to a process for preserving wood, said process comprising the following steps: (1) a modification step in which wood is heated to the modification temperature and is maintained at that temperature for a specific time; (2) a cooling step in which the wood is cooled; characterized in that the wood is heated and cooled by means of heating elements which are positioned in-between the wood. Prior to the modification step, a drying step can be carried out. According to further embodiments, the process is characterized in that one or more of the steps takes place under vacuum in a sealed chamber. Preferably, a pressure is applied to the wood during the steps, with the option of varying said pressure during the process. The invention also relates to an apparatus for implementing the process.

Cette invention se rapporte à un procédé de conservation du bois, qui comprend les étapes suivantes: (1) une étape de modification, dans laquelle le bois est chauffé à la température de modification et maintenu à cette température pendant une période spécifique; (2) et une étape de refroidissement, dans laquelle le bois est refroidi. Ce procédé se caractérise en ce que le bois est chauffé et refroidi au moyen d'éléments chauffants qui sont placés entre le bois. Avant l'étape de modification, une étape de séchage peut être effectuée. Selon d'autres modes de réalisation, ce procédé se caractérise en ce qu'une ou plusieurs des étapes ont lieu sous vide dans une chambre fermée hermétiquement. Une pression est de préférence appliquée au bois pendant ces étapes, cette pression pouvant éventuellement varier pendant le processus. Cette invention concerne également un appareil de réalisation de ce procédé.

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