高週波加熱應用在實木灣曲之研究（第二報）－藥劑處理材之灣曲性能

Application, of radio-frequency heating on solid wood bending (II)-Bending Characterstics of wood pretreated with Chemicals

莊純合(Chwen-Her Chouang)

《林產工業》 6卷4期 (1987/12) Pp. 21-31

摘要

本研究旨在應用高週波加熱對經乙二胺、甲基丙烯酸甲酯、尿素及無藥劑處理材之麻六甲合歡、山黃麻、杉木等試材，先行加熱3分鐘，再加壓彎曲成型3分鐘，其厚度分別為1.0、1.5、2.0、2.5、3.0cm，其模具曲率半徑分別為40、50、60、70、110、130cm，藉以探討高週波加熱對藥劑處理材之彎曲性能。其重要試驗結果如下：1.藥劑處理應麻六甲合歡、杉木具有便進彎曲成型的作用，但山黃麻則改善不明顯。就藥劑促進效應而言，為乙二胺＞甲基丙烯酸甲酯＞尿素＞無藥劑。2.就不同藥劑處理對實木彎曲之曲率徑時變化而言，樹種以麻六甲合歡。最具穩定性，杉木次之，山黃麻最差；藥劑以乙二胺最具穩定效應，甲基丙烯酸甲酯次之，尿素最差，但均優於無藥劑處理。

關鍵字

實木彎曲 ； 高週波加熱 ； 曲率 ； 曲率徑時變化 ； 立即回挺

並列摘要

The purpose of this study is to investigate the effect of radio-frequency heating on bending behavior of solid wood (Malacca albizzia. India-charcoal trema and China-fir). All test specimens were impregnated with chemicals such as ethylen diamine. Methyl methacrylate (MMA) and urea. Each specimen was heated for 3 minutes and then pressed bent to fit the final form for 3 minutes. The thickness and radius of curvature were 1.0, 1.5, 20, 2.5, 3.0cm, and 40, 50, 60, 70, 110, 130cm, respectively. The experimental results are summarized as follows: 1. Wood species such as Malacca albizzia and China-fir impregnated with chemicals did impove their-bending characteristics, except India-charcoal trema. The efficiency of bending effect of chemical is in the order of ethylen diamine＞MMA＞urea＞blank. 2. The change in curvature of bent solid wood with time is affected by chemical and species used. Among the species, Malacca albizzia gives the most stability and followed by China-fir and then India-charcoal trema. Among the chemicals, ethylene, diamine gives the highest stability and followed by MMA, and Urea is the lowest.

並列關鍵字

Solid wood bending radio-frequency heating curvature change in curvature with time immediate springback