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    • 9. 发明专利
    • MODIFYING TREATMENT OF WOOD OR THE LIKE
    • JPH03162902A
    • 1991-07-12
    • JP26841089
    • 1989-10-16
    • MYAGI PREFECTUREKYOGYO KUMIAI SENDAI FANICHIAHIDEAKI TAKAHASHI
    • TAKAHASHI HIDEAKITAMAGAWA KINJISATO KIYOSHISUZUKI ISAOYUME SATOSHIHONMA KATSUMISUZUKI YASUO
    • B27K3/08B27K3/36B27K3/38B27K5/00B27K5/04F26B1/00F26B3/02F26B21/06
    • PURPOSE:To make it possible to industrially and efficiently produce high quality high- temperature heat-treated material by a method wherein crack of wood is foreseen by information-processing the signals of acoustic emission (AE) and high-temperature heat treat ment is performed under a condition that its atmosphere is controlled so as not to develop cracks in wood or the like by using temperature and humidity as operating factors on the basis of foreknowledge information. CONSTITUTION:AE is detected in the form of electric signals and cracks of wood or the like is foreseen by comparing data with reference values. For example, AE, the amplitude of which is 1 V or above with the amplification factor of 80 dB within one minute, is recorded. When the cumulative number of event exceeds the reference value or the amplitude exceeds the reference value, cracks are judged to enter warning region, resulting in actuating a steam pouring section so as to pour a large amount of steam in a heat treatment chamber in a short period of time in order to adjust the humidity in the heat treatment chamber. At the same time, the temperature in the heat treatment chamber is adjusted by controlling the actuation of a heating section so as to perform high temperature heat treatment by controlling atmosphere in order to maintain the conditions, under which no AE generates from the wood or the like or AE signals generated have values below the predetermined reference value in order to prevent cracks from developing in the wood. Thus, high quality high-temperature heat-treated material can be efficiently produced.