journalmachine 2018-08-31T05:32:25+00:00 saparin Open Journal Systems <p><strong>Journal Machine;</strong>&nbsp;Jurnal Teknik Mesin Universitas&nbsp;Bangka Belitung diterbitkan sebagai media&nbsp;untuk menampung tulisan-tulisan hasil dari&nbsp;penelitian dosen maupun mahasiswa di bidang&nbsp;Teknik Mesin.&nbsp;Melalui jurnal ini, tim redaksi mengundang para&nbsp;peneliti di bidang teknik mesin untuk&nbsp;berpartisipasi secara aktif untuk&nbsp;mempublikasikan hasil penelitiannya.<br>Diharapkan tulisan-tulisan di jurnal ini dapat&nbsp;menjadi referensi bagi peneliti-peneliti di masa&nbsp;yang akan datang</p> <p><strong>Journal Machine;</strong>&nbsp;mulai vol 4 no 2 terbit pada bulan September dan kemudian berikutnya akan terbit pada bulan Maret dan September.<strong>&nbsp;</strong></p> <p><strong>Journal Machine;&nbsp;</strong>ber ISSN baik online ISSN maupun print ISSN dan terakreditasi berdasarkan&nbsp; KEPUTUSAN DIREKTUR JENDERAL PENGUATAN RISET DAN PENGEMBANGAN KEMENTERIAN RISET, TEKNOLOGI, DAN PENDIDIKAN TINGGI REPUBLIK INDONESIA NOMOR 21/E/KPT/2018 TENTANG PERINGKAT AKREDITASI JURNAL ILMIAH PERIODE I TAHUN 2018</p> APLIKASI RESPONSE SURFACE METHOD DALAM OPTIMASI PROSES THERMAL TREATMENT PASIR ZIRKON 2018-08-31T04:57:47+00:00 Zaldy Kurniawan Muhammad Subhan Muhammad Subhan Ilham Ary Wahyudie <p><em>Zirconia (ZrO<sub>2</sub>) is a ceramic material widely used in industry. Zircon sand (ZrSiO<sub>4</sub>) is one source of zirconia. Zirconia production from zircon sand can be done by heat treatment or chemical treatment with the aim of breaking the bond between ZrO2 and SiO<sub>2</sub>. In this study Response Surface Methodology (RSM) was applied to determine the optimal value of ZrO<sub>2</sub> percentage of zircon sand decomposition process through heat treatment process. Samples prepared as many as 13 variations with 3 replications. Analysis of experimental results obtained Eigen value worth -0.146262 (X<sub>1</sub>) and 0.172908 (X<sub>2</sub>). This indicates that the combination of temperature and holding time is not optimally identified at one point but spread across the saddle point.</em></p> 2018-01-02T00:00:00+00:00 ##submission.copyrightStatement## ANALISA PENGARUH PENAMBAHAN ZAT ADITIF ALAMI PADA BENSIN TERHADAP EMISI GAS BUANG UNTUK SEPEDA MOTOR 4 LANGKAH 2018-08-31T05:02:48+00:00 Najamudin Najamudin <p><em>The impact of the development of automotive technology resulted in increasing fuel demand. In this case additives are used to provide improved basic properties and high octane number values in order to improve engine performance. The research variables include the independent variable that is the percentage of additive and premium mixture while the dependent variable is the exhaust gas emission. The data obtained will be plotted on the graph. and will be used as a reference to assess the magnitude of the effect of the use of additives on exhaust emissions generated. With the addition of an additive will improve the combustion process which will reduce CO, CO2, HC, increase oxygen consumption (O2) and will eliminate the NOx compound. From the results of research conducted in the can that the significant reduction of emissions of exhaust gas occurs in the CO concentration produced by gasoline that has been mixed additives concentration (0.2 g: 100 ml) at 1,000 rpm rotation is 0.60% with a decrease of 0.09% . The value of the decline that occurs in the round of 1,000 rpm of combustion becomes better because the heat generated is more stable.</em></p> 2018-01-02T00:00:00+00:00 ##submission.copyrightStatement## PERANCANGAN GEARBOX TRAKTOR TANGAN 2 KECEPATAN 1 MUNDUR DENGAN SISTEM PEMINDAH GIGI SYNCHROMESH 2018-08-31T05:10:08+00:00 Bustami Ibrahim Aziza Noor Fadhila Rofan Yulian Romansyah <p><em>At the moment, Polman Bandung is developing a hand tractor through Pusat Pengembangan Power Train Otomotif (P3TO) with the focus of study in designing a new gearbox for hand tractor that will be developed. The developments that will be done at this time is the addition of speed on the gearbox, increased gearbox performance and increased ease of operation of the gearbox that can be viewed from gear shifting system in the gearbox. This is based on gearbox models on hand tractors in Indonesia, considered to have deficiencies in aspects that will be developed at this time, especially on the amount of speed and gear shifting system, therefore in this final project, multi speed gearbox with 2 speeds 1 reverse with a synchromesh gear shifting system have been selected to overcome the shortcomings of current hand tractor gearboxes. The design step is based on the design method of VDI 2222. This research aims to create a gearbox design that matches the list of demands desired which has better system and performance than existing on the market.</em></p> 2018-01-02T00:00:00+00:00 ##submission.copyrightStatement## PERANCANGAN MESIN PENGOLAH AIR BERSIH BERGERAK DENGAN MENGGUNAKAN SISTIM MODULAR UNTUK PENANGGULANGAN KEADAAN DARURAT AIR 2018-08-31T05:21:58+00:00 Yuliar Yasin Erlangga Heri Setiawan <p><em>Water Treatment with a modular / mobile (compact mobile) water treatment system is the development of a water upflow system developed by BPPT with the addition and improvement of process functions in an effort to optimize the raw water treatment process into clean water. The development carried out in this research is to change the form from a fixed processing installation which is usually in the form of civil work into modular sub-function / mobile (compact mobile) that size / dimension is not too big (compact design). The advantages that can be obtained from the system especially in terms of handling during processing and in terms of spare parts supply so that the expected time of repair in the event of damage to the water treatment machine is very short and also the size / dimensions of this device is small enough (compact) so it is easy to transfer between locations for emergency water condition. At the end of this study after going through the design process according to VDI 2222 and has been assessed based on several aspects, there’ll be a prototype modular mobile water treatment with a processing capacity of 1 M² per hour with a design value of 92%. The renewable aspect studied is the modular mobile water treatment design itself, the determination and selection of solutions from the sub-functional part and how the sub-functions of the parts are tied to the framework so that the installation becomes compact to serve as mobile water treatment.</em></p> 2018-01-02T00:00:00+00:00 ##submission.copyrightStatement## KARAKTERISTIK BRIKET BERBAHAN CAMPURAN CANGKANG BUAH KARET DAN BATANG SENGGANI DENGAN TEKANAN PENCETAKAN 90 PSI 2018-08-31T05:32:25+00:00 Elyas Kustiawan Eka Sari Wijianti Saparin Saparin <p><em>Briquettes or better known as charcoal fuel is biomass energy as one form of alternative energy. Briquettes have good prospects for development because of their easy manufacturing and availability of raw materials that are abundant in nature. Therefore, this research attempts to make briquettes with a combination of rubber shells and senggani. Both materials are plants that are very much found in the region of Bangka Belitung, especially in plantation areas and forest areas. The research was conducted to know the characteristics of briquettes include moisture content, ash content and heat value according to SNI 01-6235-2000 quality standard. Briquettes are made with a variety of mixed rubber shells: 100%: 0%, 75%: 25%, 50%: 50%, 25%: 75%: 0%: 100%. Adhesives use starches of starch as much as 10 grams per mixture composition. Briquettes are printed at a fixed pressure of 90 psi. To speed up the drying process, the briquette is dried in an oven at 80oC for 16 hours. The results showed that for all variations of briquette mixture composition, water content was still above 8% (not yet fulfill SNI standard), ash content was below 8% (meet SNI standard) and heat value above 5000 Kal / g SNI). The best composition variation is 75% composition of rubber shell and 25% senggani wood with 10.56% moisture content, ash content of 4.19% and calorific value of 6123.23 cal / g. This is due to the shell of the rubber fruit as a carrier of the characteristic characteristics of briquettes better than the senggani.</em></p> 2018-01-02T00:00:00+00:00 ##submission.copyrightStatement##