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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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SIFAT PELENGKUNGAN KAYU TUSAM (Pinus Mekusii Jungh et de Vries) DENGAN DUA MACAM PERLAKUAN AWAL Achmad Supriadi; Osly Rachman
Jurnal Penelitian Hasil Hutan Vol 20, No 5 (2002): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The investigation on the bending characteristics of wood conducted in Indonesia was still very limited. In contrast, the use of bent wood in the country has intensively increase particularly in furniture industry. The preparation of such bent wood at present still dominated by sawing and planing, thereby resulting in enormous woody wastes. Besides, the strength of the corresponding wood and the beauty of its orienting fiber grains are decreasing sharply.The experiment on the bending of tusam wood taken from either its tapped or untapped portion of trees has been conducted. Tusam wood was bent with the following pretreatments : boiling the wood in the hot water al 100°C, and immersing it in urea solution. Wood bending was also prepared without such pretreatments (as control). The bending was performed at five various radiuses, i.e 80 cm; 56 cm; 45 cm; 25 cm and 15 cm. The evaluation of bending value used an ordinal scale beginning from 1 to 5 were respectively for the biggest to the smallest radius. The results of bending experiment turned out to be the best for the one with the boiling pretreatment prior to bending, and the values were consecutively 2,65; 2,28 and 1,58. The critical events occurred at 15 cm radius for the bent wood with the boiling treatment, and at 25 cm for the ones with urea immersion as well as control. The bending radius significantly effected the bending results, while the tapping and fiber grain orientation did not cause a pronounced effect.The deformation setting in the radius resulting from the bending ranged from 1,93 to 4, 13 percent. The was a trend that the longer the boiling duration, the lower the changes in the bending radius.

IDENTIFIKASI POLA DAN EFISIENSI TATA NIAGA ROTAN DI JAWA Achmad Supriadi; Osly Rachman
Jurnal Penelitian Hasil Hutan Vol 19, No 4 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The marketing chain of rattan commodity is closely related to the income distribution of those who perform efficiently the marketing and mechanism system of rattan. This study deals with the investigation on the patterns of rattan-marketing in Java, i.e. (I) Inter-islands merchant --> rattan crafter --> crafter collector --> domestic consumer; (2) Inter-islands merchant --> rattan crafter --> domestic consumer; (3) Rattan crafter --> exporter producer --> overseas consumer.Viewed from the degree of benefit, all the parties involved in those rattan-marketings have gained a reasonable benefit with the revenue and cost ratio (RCR) values ranging between 1.11 and 1.27. Evaluated from the benefit distribution, rattan marketing with pattern (1) was efficient, while those with pattern (2) and (3) were inefficient and the most efficient, respectively. In the pattern (3). there appeared a positive trend about the presence of domination by Exporter producer. This is be cause that domination has brought about some benefit to those taking part in the other rattan-marketing activities. Keywords : Rattan, marketing, efficiency, and benefit.

PENGARUH KONDISI PENGGORENGAN TERHADAP KUALITAS ROTAN MANAU (CALAMUS MANAN MIQ.) Osly Rachman
Jurnal Penelitian Hasil Hutan Vol 1, No 4 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The effect of cooking condition on the quality of rattan is presented in this article. Round fresh manau rattan samples, each of 100 cm in length and 3 cm in diameter were 80 stems in all.The samples were devided into 4 groups before cooking. Each group was cooked with four different oil mixtures and four levels of cooking time.The results reveal that the composition of cooking oils has a significant effect on the cane color and compressive strength parallel to grain. but has no effect on shear strength of the rattan.The mixtures containing coconut oil tends to reduce the rate of rattan skin color change during cooking. Also, such composition produced better rattan skin color in comparison with those treated with others.

KARAKTERISTIK DOLOK DAN SIFAT PENGGERGAJIAN KAYU SAWIT (Elaeis guineensis Jacq.) Achmad Supriadi; Osly Rachman; Edi Sarwono
Jurnal Penelitian Hasil Hutan Vol 17, No 1 (1999): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Kayu sawit merupakan salah satu komoditas dari limbah perkebunan yang mempunyai potensi untuk menambah pasokan kayu bundar di Indonesia. Penelitian ini bertujuan untuk menyediakan informasi tentang sifat fisis (kerapatan, kadar air dan kerapatan ikatan pembuluh), dimensi dolok dan rendemen penggergajian kayu sawit. Untuk maksud itu diteliti sebanyak 9 dolok dari pohon sawit yamg berasal dari tanaman perkebunan di Lampung.Kerapatan kayu sawit berkisar antara 0,21 sampai 0,41 g/cm3. Kadar air basah berkisar antara 138,90 sampai 343, 69%. Kerapatan ikatan pembuluh berkisar antara 0,84 sampai 1,01 bh/mm2. Posisi kayu dalam arah transversal berpengaruh nyata terhadap ketiga sifat fisis tersebut.Diameter rata-rata dolok termasuk kulit adalah 46,64 cm, tanpa kulit 42,55 cm, diameter bagian medium dan lunak 24,54 cm. Volume rata-rata dolok untuk tiap meter panjang dengan kulit adalah 0,1745 m3, tanpa kulit 0,1456 m3, bagian keras 0,0988 m3, bagian medium 0,0288 m3 dan bagian lunak 0,019 m3. Mutu dolok menunjukan kebundaran di atas 95% dengan pengurangan diameter rata-rata 2,61 cm/m. Rendemen penggergajian rata-rata adalah 44%, terdiri dari bagian keras 31%, bagian medium 9% dan bagian lunak 4% serta limbah penggergajian sebesar 56%. Posisi dolok dalam arah vertikal batang berpengaruh nyata terhadap rendemen penggergajian.Berdasarkan kerapatan, bagian keras batang kayu sawit termasuk kelas kuat IV. Bagian medium dan lunak termasuk kelas kuat V, sehingga bagian keras batang dapat digunakan sebagai bahan konstruksi ringan seperti mebel. Berdasarkan bagian keras ini tersedia potensi kayu sebanyak 2,8 juta m3/tahun yang berasal dari penebangan pohon sawit tua.

PENERAPAN MODEL SIMULASI PENGGERGAJIAN PADA DOLOK HASIL PENJARANGAN HTI UNTUK MENINGKATKAN RENDEMEN DAN PRODUKSI PAPAN SAMBUNG Achmad Supriadi; Osly Rachman; Edi Sarwono
Jurnal Penelitian Hasil Hutan Vol 17, No 1 (1999): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Kayu hasil penjarangan Hutan Tanaman Industri (HTI) mempunyai ciri yang khas yaitu berdiameter kecil, sehingga proses penggergajiannya menghasilkan rendemen papan yang rendah dan berukuran sempit. Untuk meningkatkan rendemen, maka dalam penggergajian akan diterapkan model simulasi penggergajian, dan hasil penggergajian sebenamya dibandingkan dengan pola konvensional. Penelitian menggunakan dua jenis kayu hasil penjarangan, yaitu leda (Eucalyptus deglupta Bl.) dan damar (Agathis loranthifolia).Rendemen papan dengan penerapan pola simulasi dan pola konvensional untuk kayu leda masing-masing adalah 55,99% dan 53,37%, sedangkan untuk kayu damar adalah 58,33% dan 55, 24%. Pembelahan papan dari masing-masing pola tersebut menjadi bilah untuk bahan papan sambung menghasilkan rendemen yang tidak berbeda nyata. Rendemen bilah pola simulasi dan pola konvensional untuk kayu leda masing-masing adalah 52,59% dan 49,90%, sedangkan untuk kayu damar adalah 54,01% dan 51,43%. Papan sambung yang dibuat dari kayu leda, damar dan campuran keduanya, hanya yang dari kayu damar dan campuran leda dan damar saja yang memenuhi syarat Standar Indonesia untuk kayu bangunan non struktural.

SIFAT PEMESINAN 10 JENIS KAYU DARI DAERAH NUSA TENGGARA BARAT Osly Rachman; Sri Rulliaty
Jurnal Penelitian Hasil Hutan Vol 7, No 4 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Machining properties of ten wood species from West Nusa Tenggara is reported in this paper.The sample material was tested under ASTM D-1666 that was modified according to Forest Products Research Institute Report No.160 (1982). The samples (25 pieces/species) were dried to equilibrium moisture content condition (15 to18 % of MC). The machining properties tested are planing, shaping, boring, turning, and sanding.Four species that have good to very good machining properties are Anthocephalus cadamba Miq., Duabanga moluccana BL., Eugenia longiflora (Presl.) F. Viii., and Eugenia polyantha Wight. Whereas the other species have poor machining properties i.e., Ailanthus malabarica DC, Ficus microcarpa L.f and Palaquium javense Burck.

SIFAT PEMESINAN 32 JENIS KAYU DARI DAERAH JAWA BARAT DAN NUSA TENGGARA TIMUR Osly Rachman
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The paper presents a test result of machining properties of 32 wood species from West Java and East of Nusa Tenggara East. The air dried samples were tested according to the ASTM D1666/64 standard that was modified according to the Forest Products Research Institute Report No. 160 (1982). In most of the species 25 or more samples were available for test. The machining properties tested included planning, shaping, boring, turning and sanding.The result reveals that eighteen wood species have good to very good machining properties, five species have very good machining properties namely gintung, pongokan, rasamala, melur, tanjung and leda II.The other species are good or fair in some properties and poor or very poor in other. The species with poor or very poor machining properties are bareuhbeuy, hantap heulang and leda III.

PENGARUH POLA PENGGERGAJIAN TERHADAP RENDEMEN DAN WAKTU MENGGERGAJI KAYU MERANTI (SHOREA SPP.) *) Osly Rachman; Sadan Widarmana; Surjono Surjokusumo
Jurnal Penelitian Hasil Hutan Vol 5, No 5 (1988): 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.1988.5.5.249-258

The effects of sawing pattern on recovery and sawing time was studied using 72 logs of meranti (Shorea spp.). The logs were divided into 4 grades i.e., Prime, First, Second and Local, each group consisting of 18 logs. Each group was sawn with 3 different sawing patterns, namely semi quarter, round and live sawing. In the sawing pattern study the effect of logs diameter, brittle heart, and sapwood on recovery were also observed.The results indicated that semi quarter, round, and live sawing patterns generated a recovery as much as 46,37 %, 43,48 % and 37,61 %, respectively. The recovery of Prime grade logs was 46,92 % which was not significantly different from that of the First grade logs. The Second grade logs produced a recovery of 37.12 % and was not significantly different from that obtained from Lokal grade logs. The sawing rate was highest when live sawing pattern was applied, i.e., 0.92 m3/ hour.

PERCOBAAN PENDAHULUAN MENGGERGAJI BATANG KELAPA Osly Rachman; S Karnasudirdja
Jurnal Penelitian Hasil Hutan Vol 1, No 2 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Fourteen air dry logs of coconut trunk were sawn into boards and squares of varying dimensions following a "sawing around" pattern to obtain the best lumber yield from the hard outer portion of the trunk. A 43.16 percent yield was obtained. The productivity of break down saw based on the optimum feed speed of 8.67 meters per minute was 0.0542 m3 per minute. Only saw blades hardened by stellite tipping are recommended for sawing coconut trunks.

KETEGUHAN LENTUR STATIS SAMBUNGAN JARI PADA BEBERAPA JENIS KAYU HUTAN TANAMAN Osly Rachman; Nurwati Hadjib
Jurnal Penelitian Hasil Hutan Vol 26, No 4 (2008): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Penelitian kayu sambung jari pada kayu gmelina, mangium, manii, karet dan sengon dari hutan tanaman menunjukkan bahwa kerapatan kayu sangat mempengaruhi keteguhan rekat lentur statik serta efisiensi sambungan papan sambung jari. MOE dan MOR meningkat dengan kenaikan kerapatan kayu dan mencapai maksimum pada kerapatan 0,456. Efisiensi sambungan jari mencapai maksimum pada kerapatan 0,380, yaitu 86%. Walaupun hanya sengon yang dapat mencapai maksimum, namun semua kayu yang diteliti memenuhi standar untuk efisiensi sambungan. Kayu sengon dan karet dapat dimanfaatkan untuk keperluan non struktural, sedangkan gmelina, mangium dan manii dapat dimanfaatkan untuk konstruksi. Kerapatan kayu dapat menjadi penduga terbaik keteguhan rekat (R2=0,72). Keteguhan rekat dapat digunakan sebagai penduga terbaik efisiensi sambungan (R2=0,85). Nilai MOR dapat diduga dari nilai MOE-nya, karena 79,4% dari nilai MOR kayu sambung jari yang diteliti dipengaruhi oleh nilai MOE-nya.

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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