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題 名 | "鋸﹣乾﹣剖" 加工方法對降低3.5 cm木荷板材翹曲之功效 |
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作 者 | 翟思湧; 黃清吟; 李銘鐘; | 書刊名 | 林業試驗所研究報告季刊 |
卷 期 | 3:4 1988.12[民77.12] |
頁 次 | 頁195-207 |
分類號 | 436.42 |
關鍵詞 | 木荷; 加工; 板材; 剖; 乾; 鋸; 翹曲; |
語 文 | 中文(Chinese) |
中文摘要 | 為探討"鋸-乾-剖"加工方法(Saw-Dry-Rip Process, SDR)是否可有效降低 木荷製品之翹曲程度,藉以提高其利用價值,特以台灣中部產木荷為試材進行試 驗。試材規格為3.5*9*120cm及3.5*16*120cm兩種。試驗處理有四:1.CC=傳統 製材,傳統窯乾;2.CH=傳統製材,高溫窯乾;3.SC= 連續製材,傳統窯乾;4.SH= 連續製材,傳統窯乾。研究結果顯示:SDR加工方法,不論採行高溫或傳統窯 乾,均有降低翹曲之功效。但因高溫乾燥易招致嚴重的蜂巢裂、潰陷或乾裂等缺 點,影響木材使用。故對木荷言,以採行傳統窯乾為宜。SC及SH之乾製品材 積收率比CC 及CH平均低於13%;但其翹曲度小於6.5mm之材積比率卻較CC 及CH平均高約 80%。故連續製材法可提高木材之利用率。 |
英文摘要 | The objective of this research was to evaluate the efficiency of SDR process in reducing warp of 3.5cm Schima superba lumber. Five sample logs, 120cm in length, 53.4cm (average) in diameter, cut from middle Taiwan, were used for this study. The study design was a 2 by 2 factorial using two sawing methods (conventional-sawing and live-sawing) and two drying methods (conventional-drying and high-temperature drying). Treatment combinations were: (A)CC=Conventional sawing/conventional drying (control). (B)CH=Conventional sawing/high-temperature drying. (C)SC=SDR live sawing/conventional drying. (D)SH=SDR live sawing/high-temperature drying. The final two cut size of the test boards were 3.5*9*120cm and 3.5*16*120cm. The data show that for Schima superba: 1.Each treatment (SC, SH, CH) results in reduced warp compared to the control (CC) treatment. 2.Live-sawing, whether with conventional or high-temperature drying, produces straighter and flater boards than conventional- sawing. 3.High-temperature drying reduces quite a lot of drying time and energy consumption; but incurs severe drying defects, specially in honeycomb and collapse. It is evident that high-temperature drying is not suitable for Schima superba. 4.The volume yield for live sawn material was slightly lower (about 13% in average) than those of conventional sawn, however, the recovery of the material under 6.5mm in warp for the former method was much higher (about 80% in average) than those of the later method. It appeared to indicate that SDR process can increase the yield of acceptable piecess. 5.The relationship between M. C. and shrinkage in all of the treatments was in a curvilinear correlation. |
本系統中英文摘要資訊取自各篇刊載內容。