The effect of log heating temperature on the peeling process and veneer quality: beech, birch, and spruce case studies
Article dans une revue avec comité de lecture
Heating green-wood prior to peeling is necessary to improve both peeling process and quality of veneer. This study investigates optimum heating temperatures by soaking of beech, birch and spruce. Experiments have studied the influence of heating temperatures from 20 to 80 C on thickness deviations and veneer lathe checking using a pneumatic rugosimeter and image analysis of opening checks with the SMOF device (Système de Mesure de l’Ouverture des Fissures). Conclusions account for reduced heating temperatures compared to the temperatures currently in-use in the industry. Already at 50 C, positive effects of heating ensure efficient peeling process. Low temperatures produce veneers with deeper and more spaced checks than high temperatures when checks are closer and less deep, becoming even unpredictable especially in case of spruce. These results establish the SMOF as an essential non-destructive control device to control the quality of the veneer produced at research level.
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Article dans une revue avec comité de lectureDUPLEIX, Anna; OULD AHMEDOU, Sid' Ahmed; BLERON, Laurent; ROSSI, Frédéric; HUGHES, Mark (De Gruyter, 2013)Heating green wood logs by infrared (IR) radiation during peeling for veneer production has been numerically simulated, focusing on the heating kinetics of a green wood cylinder rotating with a decreasing radius. The results ...
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Article dans une revue avec comité de lecturePAŁUBICKI, Bartosz; MARCHAL, Rémy; BUTAUD, Jean-Claude; DENAUD, Louis; BLERON, Laurent; COLLET, Robert; KOWALUK, Grzegorz (Springer Verlag, 2010)In the present paper, a novel method for veneer checks measurement and description based on digital image analysis is evaluated. According to this method, the camera is located sideways to the veneer allowing for viewing ...