人工林杨木和杉木的干燥特性与干燥工艺

Drying Characteristics and Drying Schedule for Plantation Grown Poplar and Chinese Fir Lumber

研究了人工林杨木和杉木的干燥特性和干燥工艺,并对连续式干燥基准与传统的阶段式干燥基准进行了对比。结果显示,人工林杨木和杉木均属较易干燥的树种,在百度试验中主要发生的是端裂、端表裂以及表裂,无内裂发生,但截面变形较为严重,木材窑干后主要缺陷也是翘弯等变形。采用连续式干燥基准干燥的杨木、杉木,其干燥应力及干燥缺陷都比阶段式干燥基准少。

This paper describes the drying characteristics of lumber from plantation grown Poplar [Populus×euamericana (Dode) Guineir cv'I-214'] and Chinese Fir (Cunninghamia lanceolata). Two drying processes were used for this study: a continuous schedule and conventional step drying schedule. The results were analyzed and showed that plantation grown wood from Poplar and (Chinese) Fir were easy to dry. After being dried at 100℃, no internal checks occurred but there was some severe cross deformation in the lumber. The lumber dried by the continuous schedule had (better) drying quality with less drying stress and deformation than that dried by the conventional step schedule, on the whole.