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題名 | "鋸﹣乾﹣剖" 加工方法對降低3.5 cm相思樹板材翹曲之功效= |
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作者 | 翟思湧; 黃清吟; 李銘鐘; |
期刊 | 林業試驗所研究報告季刊 |
出版日期 | 19880300 |
卷期 | 3:1 1988.03[民77.03] |
頁次 | 頁379-392 |
分類號 | 436.42 |
語文 | chi |
關鍵詞 | 加工; 板材; 相思樹; 剖; 乾; 鋸; 翹曲; |
中文摘要 | 為探討"鋸-乾-剖"加工方法(Saw-Dry-Rip Process, SDR)是否可有效 降低相思樹製品翹曲之發生,藉以提高其利用價值,特以臺灣中部產約 30年生 相思樹為試材進行試驗。試村規格為3.5*8*95cm及3.5*16*95cm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,高溫窯乾。研究結果顯示:SC及SH處理之平均翹曲 均較CC及CH為低,SDR加工方法具有抑制相思樹板材發生翹曲之功效。CH及SH較 CC及SC可節省電力65%以上,節省油料60%以上,縮短乾燥時間72%以上;但CH及 SH之乾燥缺點較嚴重,影響木材強度。對相思樹而言,SDR加工方法以採行傳統 窯乾為宜。 |
英文摘要 | The objective of this research was to evaluate the efficiency of SDR process in reducing warp of 3.5cm acacia (Acacia confusa) lumber. Eighteen sample bolts, 95cm in length, 30cm (average) in diameter, cut from 30-year-old Taiwan acacia in central Taiwan, were used for this study. The study was a 2 by 2 factorial design 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 sizes of the test boards were 3.5*8*95cm and 3.5*16*95cm. The results of this experiment were as follows: 1.SDR live-sawing, whether with conventional or high-temperature drying, produced more flat boards than conventional sawing. The SC treatment reduced warp more than 43 percent over the CC control, while SH treatment reduced warp 32 percent (Table 4). 2.Treatments SC and SH showed the least amounts of warps, with 13.89 percent and 7.90 percent of the test boards warp-free, respectively. While CC and CH had no warp-free boards (Table 3). 3.CH and SH reduced drying time by 72 percent, and saved power and oil consumptions by more than 65 percent and 60 percent respectively, as compared with CC and SC (Table 6). 4.Treatments CH and SH showed higher amounts of drying defects, especially honeycombs and collapses, as compared with CC and SC (Table 5). Most of the mechanical properties of CH and SH were also significantly (at 0.05 level) lower than those of CC and SC, with the exception of impact bending and compression parallel to grain (Table 8). 5.The relationship between moisture content and shrinkage in all the treatments was in a curvilinear correlation. 6.It is recommended that the SDR process using conventional- drying could be the best way of reducing warp for 3.5cm-thick acacia lumber. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。