Sifat Pemesinan Lima Jenis Kayu Asal Riau

Abstract

Wood machining is one of important utilization properties, especially for lesser known wood species. This paper determines the machining properties and possible utilization of punak (Tetramerista glabra Miq.), meranti bunga (Shorea teysmanniana Dryer ex Brandis), mempisang (Alphonsea spp.), suntai (Palaquium burckii H.J.L.), and pasak linggo (Aglaia argentea Blume) originated from Riau Province. The tests were conducted based on the modified testing standard of ASTM D-1666-64. Twenty samples of each species were machining tested for the work of planing, shaping, boring, turning, and sanding. Visual observation was performed using loupe 10x magnification. Research revealed that planing, shaping, boring, turning and sanding properties were significantly influenced by wood species. Punak and pasak linggo had good and very good machining properties. Mempisang had a wide range machining properties from poor to very good, while meranti bunga had poor to good machining properties. Lastly, suntai had a moderate to good machining properties. Regression analysis showed that higher specific gravity resulted in better machining properties. Wood with good to very good categories could be suggested as raw materials for various products. Mempisang and meranti bunga should be carefully handled, particularly in boring and turning processes.

Evaluasi Cacat Pengeringan Dan Pemesinan Pada Empat Jenis Kayu Cepat Tumbuh Termodifikasi Panas

“…Untuk cacat akibat kegiatan pemesinan yang muncul adalah cacat serat berbulu, serat terangkat, serat patah, dan tanda serpih (Fernando et al, 2011;Fatomer et al, 2013). Penelitian sifat pemesinan telah dilakukan pada beberapa jenis kayu seperti Eucalyptus grandis dan Pinus caribaea (Fernando et al, 2011), kayu karet (Hevea brasiliensis) (Ratnasingam & Ioras 2012) dan beberapa jenis kayu asal Riau (Supriadi., 2018). Berdasarkan penelitian Fernando et al, (2011) dan Ratnasingam dan Ioras, (2012) disebutkan bahwa semakin tinggi suhu dan waktu pemanasan, maka kualitas pemesinan kayu semakin meningkat.…”

“…Hasil serupa juga terdapat dalam penelitian pada jenis kayu surian dan kepayang, serta pada jenis kayu Tabel 9. Analisis ragam pengaruh jenis kayu dan waktu pemanasan terhadap sifat pemesinan (pengampelasan, penyerutan, pembentukan dan pemboran) kurang dikenal di Jawa Barat seperti marasi, asam jawa, ki keuyeup, cantigi dan kendal (Supriadi, 2017). Hasil penelitian tersebut menyebutkan bahwa cacat dominan yang terjadi adalah serat berbulu yang berkisar antara 0−50%.…”

“…Cacat lain seperti kehancuran, kelicinan dan penyobekan hanya terjadi pada kayu jabon dengan persentase yang kecil yaitu berkisar antara 0%−13,25%. Hasil serupa juga disampaikan dalam penelitian Supriadi (2017) dan Rianawati dan Setyowati., (2015) bahwa cacat dominan dalam pemboran kayu adalah serat berbulu dengan persentase cacat berkisar antara 0−30%, sedangkan untuk cacat lainnya tergolong ringan. Jumlah persentase cacat tertinggi terdapat pada kayu sengon dan jabon dengan kualitas pemboran berkisar antara jelek hingga baik.…”

Distribution of Certified Wood Teak Wood Machining Properties as Export Furniture Materials

“…Heterogeneous conditions in the people's forest itself are assumed to affect the quality of the wood produced, which will ultimately affect the nature of the final product. A thorough understanding of the basic properties will help in the maximum utilization of wood as well as the improvement of the quality of its wood (Ketut et al, 2011;Marsoem et al, 2016a;Sulistyo et al, 2010;Supriadi & Abdurachman, 2018).…”

“…Knowledge of the basic properties can direct the purpose of utilization of a type of wood in order to obtain the efficiency of the use of this type of wood so as to replace or complement the use of commercial types of wood (Lukmandaru et al, 2015;Marsoem et al, 2016 b;Siska et al, 2018;Yustinus Suranto et al, 2008). Important basic properties for export furniture raw materials include machining properties (Rianawati et al, 2015;Supriadi & Abdurachman, 2018;Yustinus Suranto et al, 2015). Machining properties are one of the parameters to determine the quality of wood.…”