PENETAPAN UKURAN SASARAN SEBAGAI USAHA PENINGKATAN EFISIENSI PROSES PENGGERGAJIAN

Osly Rachman, Jamal Balfas

Abstract


Two units of sawmill in Lampung (Sumatera) and three units in West-Java have been visited for the purpose of this study. Determination of target size on each sawmill was firstly done by collecting data from thickness measurements of 100 board samples. The data was then calculated using the most common formulas used for determining the lumber target size.

The result of the study revealed that actual size produced by two sawmills surveyed were higher than target size, ranging from 1.08 to 1.58 mm. The actual size from three other sawmills were lower than target size, ranging from 0.26 to 2.18 mm. The sawmill A has apparently the best sawing capability. This was indicated by the smallest thickness range either within or between board i.e. 0.89 mm and 0. 79 mm. Meanwhile, its total sawing variation was smallest i.e. 0.49 mm.

The result of this study was an indication that there is a need for improving the efficiency of sawing process through the application of target size determination.


References


Anonymus.1985. Petunjuk teknis pengujian kayu gergajian Rimba lndonesia. Direktorat Tertib Peredaran Hasil Hutan. Direktorat Jenderal Pengusahaan Hutan, Jakarta.

Martawijaya, A. dan Iding, K. 1986. Ciri umum sifat dan kegunaan jenis-jenis kayu Indonesia. Pusat Litbang Hasil Hutan, Bogor.

Priasukmana, S. 1987. Pengaruh penyerutan kayu terhadap penetapan ukuran sasaran tebal kayu gergajian beberapa jenis-jenis perdagangan Indonesia. Makalah penunjang DIP VII. Badan Litbang Kehutanan, Jakarta.

Rachman, 0. 1986. Penentuan ukuran sasaran kayu gergaji- an. Jurnal Penelitian dan Pengembangan Kehutanan. 2 (1). hal. 29-31, Bogor.

Soewarsono, W. 1963. Penyelidikan pendahuluan tentang sifat-sifat fisik dan mekanik kayu-kayu Indonesia. Laporan No. 5. Lembaga Penelitian Hasil Hutan, Bogor.

Steele, P.H. 1984. Factors determining lumber recovery in sawmilling. USDA. Forest Service FPL. Madison.

Stern, A.R. dan David, W.L. 1979. Improving sawing accuracy does help. USDA Forest Service. FPL, Madison.

Uddeholm. 1980. How to increase profit in band-sawing, practical models for increased lumber recovery. Uddeholm strip steel AB, S-68401 Munkorfs. Sweden.

Whitehead, J.S. 1978. Procedures for developing a lumber size control system. Information report VP-X-84. Vancouver, British Columbia.




DOI: https://doi.org/10.20886/jphh.1989.6.4.215-219

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