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All Journal Jurnal Penelitian Hasil Hutan Jurnal Penelitian Hasil Hutan

osly rachman

Pusat Penelitian dan Pengembangan Hasil Hutan

Author-ID : 2622079

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Energy Materials Science & Nanotechnology

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SAFAT PEMESINAN 10 JENIS KAYU DARI DAERAH SULAWESI UTARA Sri Rulliaty; osly rachman
Jurnal Penelitian Hasil Hutan Vol 9, No 2 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1991.9.2.82-88

machining properties of ten wood species from north Sulawesi was studied. the sampie materiawas tested using ASTM D-1666-64, that was modified to forest products researeh institute report No. 160 (1982). firatiy,the;samples (25 pieoes/species) were dried to an equilibrium moisture content condition (15 or 18 % of MC). the machine-ing properties examined were paining, shaping, boring,turning and the percentage wood defect recorded. the result shows that, five wood species has fair to very good machining properties i.e.Dysoxylum sp. elmerillia ovalis, lophopetalum javenicum,pangium edule and serianthes minahassae.the remainders has good to very good machine-ing properties, whereas three wood secies i.e. aglaia versteghii.lapiacea subintegerrima and neonaudes sp. better than others.

PRODUKTIVITAS DAN BIAYA PRODUKSI SERPIH KAYU MENGGUNAKAN MESIN SERPIH MUDAH DIPINDAHKAN (SMD): Studi Kasus di BKPH Parungpanjang, Bogor Achmad Supriadi; Osly Rachman; M I Iskandar
Jurnal Penelitian Hasil Hutan Vol 24, No 2 (2006): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2006.24.2.103-115

Hasil pemanenan kayu di areal hutan baik hutan alam maupun hutan tanaman masih menyisakan potongan-potongan kayu kecil. Potongan kayu yang biasa disebut sebagai limbah pemanenan pada umumnya ditinggalkan di hutan dan sebagian yang dianggap masih laik dijual kepada penduduk sekitar hutan untuk dimanfaatkan sebagai kayu bakar atau bahan baku energi lainnyaDalam rangka meningkatkan pemanfaatan limbah kayu dari hasil pemanenan hutan tanaman, telah dilakukan penelitian pengolahan limbah kayu jenis mangium (Accacia mangium) di areal hutan tanaman di BKPH Parungpanjang, Bogor. Hasil penelitian menunjukkan bahwa faktor konversi rarta- rata limbah pemanenan untuk bahan baku serpih (chip) adalah 1 sm = 0,4791 m3 = 0,257 ton. Rendemen serpih sebelum disaring dan setelah disaring masing-masing adalah 97% dan 53%. Produktivitas penyerpihan adalah 1,6 ton/hari. Investasi pendirian satu unit pengolahan serpih kayu sebesar Rp 38.000.000. Biaya produksi per tahun sebesar Rp 156.109.113 dan harga pokok produksi serpih sebesar Rp 325.227 per ton serpih. Dengan harga jual serpih Rp 360.000 per ton, dapat diperoleh laba kotor dan laba bersih rata-rata per tahun masing-masing sebesar Rp 16.691.040 dan Rp 14.187.784.

PENETAPAN UKURAN SASARAN SEBAGAI USAHA PENINGKATAN EFISIENSI PROSES PENGGERGAJIAN Osly Rachman; Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

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.

KUALITAS REKATAN BILAH SAMBUNG JARI PADA LIMA JENIS KAYU DENGAN PEREKAT LIGNIN DAN TANIN Adi Santoso; Osly Rachman; Jamaludin Malik
Jurnal Penelitian Hasil Hutan Vol 23, No 3 (2005): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2005.23.3.187-195

Penelitian terdahulu menunjukkan bahwa komponen senyawa dalam lignin dan tanin dapat dibuat kopolimer dengan resorsinol dan formaldehida membentuk resin lignin dan tanin formaldehida untuk produksi kayu lamina eksterior.Penelitian ini bertujuan mengetahui kualitas lignin resorsinol formaldehida dan tanin resorsinol formaldehida dalam pembuatan bilah sambung jari dari lima jenis kayu untuk bangunan perkapalan, yaitu: tempeas (Teysmanniodendron sympliciodes Kosterm), waru (Hibiscus tiliaceus L), bunyo (Trioma malaccensis Hook F.), gambir (Trigonopheura malayana Hook F.), dan rasamala (Altingia exelsa Noronha) terhadap sifat mekanisnya.Hasil penelitian menunjukkan bahwa tidak dijumpai adanya delaminasi bilah sambung jari pada kelima jenis kayu. Sifat mekanis dari bilah sambung jari dipengaruhi secara nyata oleh jenis kayu, jenis perekat dan interaksi kedua faktor tersebut.

PENETAPAN UKURAN SASARAN PADA LIMA UNIT PENGGERGAIIAN KAYU JATI DI JAWA TENGAH & JAWA TIMUR Osly Rachman; Sri Rulliaty
Jurnal Penelitian Hasil Hutan Vol 9, No 4 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Three teak wood sawmilis in Central Java and two in East Java have been selected for study on target aize determi- nation Using 100 board samples from each sawmill. The result was calculated using formulos for determining lumber tar get sizeThe rasult indicates that actual size produced by three sawmills were higher than target size, ranging from 0.32 mm to 2.11 mm. The actual size produced by two other sawmills was lower than the tagret size, ranging from 0.61 mm to 6.48 mnt 5.48 mm. This result indicates that target size determination is important to improve sawing efficiency.

POTENSI DAN BIAYA PEMUNGUTAN LIMBAH PENEBANGAN KAYU MANGIUM SEBAGAI BAHAN BAKU SERPIH Sukadaryati Sukadaryati; Dulsalam Dulsalam; Osly Rachman
Jurnal Penelitian Hasil Hutan Vol 23, No 4 (2005): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2005.23.4.327-337

Pemanfaatan kayu di hutan sampai saat ini masih dirasakan belum optimal, terbukti masih tingginya limbah kayu dari kegiatan permanenan. Limbah yang terjadi dari pohon yang ditebang sampai dengan diameter batang minimum 15 cm adalah sebesar 57%. Oleh karena itu langkah-langkah pengelolaan hutan menuju zero waste perlu dilakukan. Salah satu cara untuk meningkatkan pemanfaatan hutan tanaman adalah memanfaatkan limbah penebangan hutan tanaman menjadi bahan baku serpih. Penelitian potensi dan biaya pemungutan limbah penebangan kayu mangium (Acacia mangium) telah dilakukan di BKPH Parungpanjang, KPH Bogor pada tahun 2002. Hasil penelitian menunjukkan bahwa rata-rata potensi dan biaya pemungutan limbah penebangan kayu mangiu sebagai bahan balm serpih adalah 0,079 m3/pohon atau 15,4% dan Rp. 15.250/sm. Potensi limbah penebangan mangium sebagai bahan baku serpih yang layak diusahakan adalah sebesar 8,33 sm/ha atau 4,444 m3/ha. Sementara itu harga pokok limbah kayu mangium adalah sebesar Rp. 23.375/sm.Dukungan pemerintah sangat diperlukan dalam bentuk kebijakan yang dapat mendorong kembali masyarakat sekitar hutan untuk memanfaatkan limbah penebangan kayu dari hutan tanaman sebagai bahan baku serpih. Kebijakan tersebut berupa kemudahan dalam memperoleh limbah kayu dengan harga sesuai besarnya biaya eksploitasi dan menetapkan harga dasar serpih yang tidak terlalu tinggi.

PENGARUH PERACUNAN TRIKLOPIR DAN POLA PENGGERGAJIAN TERHADAP SIFAT PENGGERGAJIAN KAYU RASAMALA (ALTINGIA EXCELSA NORONHA) Osly Rachman; Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol 6, No 5 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The objective of this study is to determine the sawing properties of triclopyr poisoned rasamala logs compared to the girdled and normal ones. The effect of sawing pattern on sawing properties were also observed.The log samples used in this experiment comprise of 18 pieces which were collected from three different groups of tree (poisoned and girdled in one year periode, and control). Six logs of each group were sawn in two sawing patterns, namely live sawing and semi-quarter sawing. Parameters of sawing observed include recovery, productivity, power con- sumption, and sawn timber defects, particulary splits and bowing.The results of study revealed that moisture content of poisoned logs was 20% lower than the normal one. Mean-while, both moisture content of girdled logs and poisoned ones are not significantly diferent. Poisoning treatment on rasamala trees in comparison to girdled and normal ones did not show significant difference in any sawing properties, except sawing productivity. The sawing recovery, power consumption, splits and bowing of sawn timber were 62%; 32.37 watt sec./cm2, 5.21 cm and 3.91 cm, respectively. The live sawing could increase the pro- ductivity as much as 0.18 m3 /hour higher than semi-quarter sawing.

PROGRAM SIMULASI KOMPUTER UNTUK MENINGKATKAN RENDEMEN PENGGERGAJIAN Osly Rachman
Jurnal Penelitian Hasil Hutan Vol 12, No 5 (1994): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The computer simulation programs for increasing lumber recovery are presented in this paper. These programs were created for sawing logs with live sawing, half sawing, and semi-quarter sawing patterns, and convening the sawn limber into blanks using turbo basic language version 1, 1. The log model used was a truncated cylinder to represent the real logs.The best opening first (BOF) of logs is computed by entering data of log factors such as diameter and length, and sawing factors such as saw kerf, sawn limber thickness, allowance for sawing thickness, blank width, and allowance for sawing width.For several runs on computer under any circumtances the program produced nominal lumber and blank recovery ranging 73-76 % and 83 - 89 %, respectively, the values of shrinkage allowance, planing allowance and sawing variation have been included in nominal lumber recovery.

PENERAPAN PROGRAM SIMULASI KOMPUTER PADA PENGGERGAJIAN EMPAT JENIS KAYU HUTAN TANAMAN INDUSTRI Achmad Supriadi; Osly Rachman
Jurnal Penelitian Hasil Hutan Vol 16, No 1 (1998): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Tujuan penggunaan program simulasi komputer dalam proses penggergajian adalah untuk menentukan posisi pembelahan pertama terbaik pada dolok agar diperoleli rendemen maksimal. Program ini telah diuji cobakan pada kayu mahoni, tusam, sungkai dan mangium. Panjang rata-rata dolok 226,29 cm (200 cm - 300 cm ) dan diameter rata-rata dolok 24 cm (19 cm - 42 cm). Rendemen rata-rata uji coba ke empat jenis kayu tersebut adalah sebesar 56,39%, rendemen rata-rata simulasinya 69,77%, ratio antara kedua rendemen tersebut rata-rata 0,81. Berdasarkan kelas diameter yaitu 13-20 cm; 21-30 cm; 31-40 cm dan lebih dari 40 cm, besar rendemen rata-rata uji coba berturut-turut adalah 49,85%; 58,57%; 59,47% dan 36,99%. Rendemen rata-rata simulasi berturut-turut adalah 67,02%; 72,68%; 80,02% dan 82,70%.Panjang dolok mempengaruhi rendemen kayu gergajian, sedangkan pengaruh diameter dan kelengkungan dolok tidak nyata. Panjang, diameter dan kelengkungan dolok secara serempak mempengaruhi rendemen.

SIFAT PEMESINAN BEBERAPA JENIS KAYU DARI DAERAH KALIMANTAN BARAT DAN JAWA BARAT Osly Rachman; Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol 6, No 3 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Machining properties of 16 wood species from West Kalimantan and West Java has been identified using the modified ASTM D-1666 which was described in the Forest Products Research Institute Report No. 160 (1982). The samples (25 pieces/species) were dried to equilibrium moisture content condition (15 to 18% of MC). The machining properties tested are planing, shaping, boring, turning and sanding.Seven species that have good to very good machining properties are kenari I, kenari II, kemayau, belangeran, ki sampang, ki endog and surian bawang. The best machining properties, however, were found on johar, gadog and putat. Whereas the other species are good or very good in some properties and fair or even poor in others,

Co-Authors Achmad Supriadi Adi Santoso Dede Rohadi Dulsalam Dulsalam Edi Sarwono Efrida Basri Jamal Balfas Jamaludin Malik M I Iskandar Meri Suwirman Nurwati Hadjib S Karnasudirdja Sadan Widarmana Sri Rulliaty Suhadi Hardjo Sukadaryati Sukadaryati Surjono Surjokusumo

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