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Romli Romli
Politeknik Negeri Sriwijaya
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Pengaruh Fraksi Volume dan Orientasi Serat Pada Komposit Hibrid Berpenguat Serat Gambas serta Eceng Gondok Terhadap Kekuatan Bending Rizki Ramadoni; firdaus firdaus; Romli Romli; Sailon Sailon; A. Pramudya AFG; Muhammad Nugraha
Jurnal Teknik Mesin Vol 15 No 2 (2022): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.15.2.891

Abstract

Wood is increasingly difficult to obtain due to the use of excess wood. Many efforts were made to replace wood, one of which was composite material. This study aims to determine the most optimal bending strength with the influence of variations in volume fractions and fiber orientation in hybrid composites with luffa fibers and hyacinth fibers. In making composites using the hand lay-up method with alaklization treatment on gambas and hyacinth fibers using 5% NaOH which is varied with the volume fraction used in this study with the ratio of resin: hyacinth: gambas is (60%:20% :20%),(70%:15%:15%), as well as (80% :10%:10%) and the orientation of the fibers with the arrangement of the luffa / hyacinth / luffa layer is (0°/ 45 °/ 90°), (0˚/45˚/0˚), (90˚/0˚/90˚). Bending testing was performed with ASTM D790 standard and hypothesis testing using the two-way ANOVA method. From the results of bending testing, the most optimal strength value was found, which was 43.33 N / mm2, where the value was not higher than the bending strength value in the multiplex, which was 17.53 N / mm2. Meanwhile, the results of hypothesis testing are that there is an influence on the volume fraction factor, the direction of fiber orientation and the interaction with bending forces.
Peningkatan Efisiensi Produksi Briket Batok Kelapa Menggunakan Mesin Cetak Kapasitas 10kg Baiti Hidayati; M. Rasid; Herlin Sumarna; Romli Romli; Aji Pangestu Wijaya
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.8091

Abstract

Manual production of coconut shell briquettes in small and medium-scale industries often faces limitations in productivity, product uniformity, and dependence on human labor. This study aimed to evaluate the efficiency improvement of coconut shell briquette production through the use of a 10 kg-capacity briquetting machine. An experimental method was applied by comparing mechanical briquetting and manual hand-pressing using the same raw material composition, namely 7 kg of coconut shell charcoal powder, 3 kg of tapioca starch adhesive, and 1 liter of water as a mixing aid. The observed parameters included production capacity, production time, physical quality score, quality consistency, and electrical energy consumption. The results showed that the machine produced 10 kg of briquettes in 1 hour, whereas the manual method produced approximately 3.3 kg per hour and required about 3 hours to reach the same production quantity. The machine increased production capacity by approximately 200% and reduced production time by approximately 67%. The physical quality score increased from 70% to 85%, while quality consistency increased from 80% to 95%. Although the machine consumed 0.5 kWh per process, the energy requirement was relatively low, equivalent to 0.05 kWh/kg of briquettes. These findings indicate that the 10 kg-capacity briquetting machine is feasible as an appropriate technology to improve productivity and product uniformity for small and medium-scale coconut shell briquette producers.
PENGEMBANGAN MESIN PEMBUAT BRIKET BATOK KELAPA KAPASITAS 10 KG SEBAGAI UPAYA MENINGKATKAN EFISIENSI PRODUKSI PADA KELOMPOK TANI DI LALAN, KABUPATEN MUSI BANYUASIN M. Rasid; Baiti Hidayati; Herlin Sumarna; Romli Romli; Aji Pangestu Wijaya; Labib Ghinatajaya
AUSTENIT Vol. 17 No. 2 (2025): AUSTENIT: Oktober 2025
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36257/austenit.v17i2.11420

Abstract

Charcoal briquettes are an environmentally friendly alternative energy source; however, conventional production is hampered by the slow and labor-intensive manual molding process. This study aims to improve production efficiency for farmers in Lalan, Musi Banyuasin, by designing and testing a screw-type charcoal briquette press machine powered by an electric motor. The machine is designed with a capacity of 10 kg per cycle, using coconut shell charcoal powder as the test material. The research methods include the design, fabrication, and performance testing through a comparative study of the machine and manual molding processes, as well as product uniformity evaluation. The results show a significant increase in production rate. The screw machine is able to produce an average of 24 briquettes in 50 seconds, while the manual method only produces 5 briquettes in the same time, indicating an approximately 4.8-fold increase in output. The machine's measured capacity reaches 32.29 kg/hour under extended testing conditions, and the briquettes produced are uniform according to the mold. Based on the test results, the machine demonstrates greater efficiency as the molding time increases, with a total output of 144 briquettes in 300 seconds, while the manual method only produces 30 briquettes in the same time. This study concludes that the implementation of the screw-type briquette press machine effectively accelerates the production process, reduces reliance on manual labor, and has the potential to increase the economic value of biomass waste for small- to medium-scale enterprises.
Studi Eksperimental Vibrator Shaft pada Mesin Pressure Leaf Filter di Kernel Crushing Plant PT. Hindoli Mill Sungai Lilin David Chandra; Taufikurrahman Taufikurrahman; Ella Sundari; Romli Romli; Rizky Berlian; Syafei Syafei
TEKNIKA Vol. 19 No. 2 (2025): Teknika Mei 2025
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.15030262

Abstract

Mesin pressure leaf filter dengan model PLF 38-1380/1350-15 yang ada di PT. Hindoli Mill Sungai Lilin memiliki masalah kerusakan pada vibrator shaft yang terjadi akibat beban kejut yang terlalu besar. Penelitian ini bertujuan mengganti material yang digunakan pada vibrator shaft lama dan dilakukan pengujian komposisi, uji impak, dan uji tarik. Nilai yang diperoleh dari penelitian ini adalah spesifikasi vibrator shaft lama menggunakan material Stainless Steel SS304 dan vibrator shaft baru menggunakan material Baja AISI-1070. Hasil uji tarik vibrator shaft baru material Baja AISI-1070 dengan nilai rata-rata ultimate tensile strength 527,955 N/mm2. Hasil uji impak vibrator shaft baru material Baja AISI-1070 dengan rata-rata nilai impak 3,614 J/mm2 jauh lebih kuat dibandingkan vibrator shaft lama material Stainless Steel SS304 dengan rata-rata nilai impak 0,548 J/mm2.
Analisa Desain Dan Optimasi Topologi Roda Gigi Transportir Pada Mesin Bubut Maximat V13 Ichsanul Hakim; Taufikurrahman Taufikurrahman; Ella Sundari; Romli Romli; Indra Gunawan
TEKNIKA Vol. 19 No. 2 (2025): Teknika Mei 2025
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.15522587

Abstract

Mesin bubut dengan merk maximat bertipe v13 yang ada pada bengkel produksi teknik mesin Politeknik Negeri Sriwijaya memiliki masalah yang sering terjadi, yakni kerusakan pada roda gigi transportir yang mana akan menghambat kegiatan praktikum untuk mahasiswa di Politeknik Negeri Sriwijaya. Dengan latar belakang tersebut maka dibuatnya penelitian ini dengan tujuan agar hasil optimasi topologi yang berfokus pada optimasi penggunaan dan pemilihan material dengan mempertimbangkan kemampuan tegangan pada roda gigi dengan simulasi yang dilakukan di Solidworks sehingga mendapatkan nilai tegangan, displacement, dan safety factor pada roda gigi tranportir. Hasil yang didapat dari penelitian ini ialah rekomendasi desain hasil optimasi topologi dengan konsep yang kedua, yakni dengan nilai tegangan sebesar 1,315e+01 N/mm2 , displacement 2,141e-03 mm, dan safety factor dengan nilai 3. Dengan adanya penelitian ini, dapat menjadi acuan untuk rancangan dalam pembuatan roda gigi transportir yang lebih baik dari roda gigi transportir sebelumnya.
Co-Authors A. Pramudya AFG Aji Pangestu Wijaya Baiti Hidayati David Chandra Ella Sundari Firdaus Firdaus Herlin Sumarna Ichsanul Hakim Indra Gunawan Labib Ghinatajaya M. Rasid Muhammad Nugraha Rizki Ramadoni Rizky Berlian Sailon Sailon Syafei Syafei Taufikurrahman Taufikurrahman