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All Journal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Abdi Insani IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Bobby Umroh
Universitas Tjut Nyak Dhien Medan, Jl. Gatot Subroto/Jl. Rasmi No 28, Medan 20123
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Other

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Rancang Bangun Cetakan Botol Ukuran 30 ml Model Blow Pada Mesin Injection Molding Siagian, Martua Sangap; Ramdan, Dadan; Umroh, Bobby
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI), May
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.2009

Abstract

At present, the need to use plastics and the advancement of manufacturing technology for the material itself drive people's demand for plastics, and the development of technology has further increased competition in all fields of industry. Therefore, the plastics industry needs to increase production in terms of quality and quantity. In this way, plastic can slowly replace iron and steel due to its good moldability and light weight. In this research, as a research method, we use quantitative methods by conducting surveys, data collection and field research related to the research theme. After the data is collected, the next step is the fabrication of the test equipment. From the mold fabrication results, the mold is in the shape of a 30 ml bottle with dimensions of 105 mm x 40 mm, inlet ø 6 mm, outlet 3 mm, and the mold is made of aluminum. This mold is called the 3 plate system and the mold consists of 3 main parts which are divided into 3 parts. Good and ideal molding results were obtained with HDPE (High Density Polyethylene) material with injection speed parameters of 8 rpm and temperature of 190°C.
Penerapan Reaktor Biogas Skala Rumah Tangga dari Kotoran Domba sebagai Solusi Energi di Umroh Farm Idris, Muhammad; Umroh, Bobby; Jufrizal, Jufrizal; Hermawan, Indra; Harahap, Uun Novalia
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 3 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v3i1.174

Abstract

This Community Service activity addresses sheep manure waste issues at Umroh Farm, Patumbak Village, Deli Serdang. Waste buildup causes odor and environmental pollution despite its potential as biogas material. The solution was implementing appropriate technology by constructing a household-scale biogas reactor. Activities included participatory training, equipment assembly, and field trials. The digester, with a ±200-liter capacity, was made from plastic drums and equipped with input-output, cleaning, and gas collection lines. The implementation produced an average of 0.015 m³ of biogas per hour, with fire ignition lasting 1–2 seconds. The program reduced livestock waste, improved farmers’ awareness and skills and supported clean energy and climate change mitigation goals. Its success shows that simple biogas technology can provide an integrated solution for environmental management and community empowerment.
PENDAMPINGAN PEMBUATAN MESIN PENGGILING PADI OLEH KELOMPOK TANI LEMBUR AYU FARM DI DESA SEI MENCIRIM KECAMATAN KUTALIMBARU KABUPATEN DELI SERDANG Salqaura, Siti Alhamra; Alfifto, Alfifto; Umroh, Bobby
Jurnal Abdi Insani Vol 11 No 4 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i4.1902

Abstract

Rice milling machines have a crucial role in the rice production process. Using rice milling machines can increase efficiency, productivity, and quality. This community service aims to increase knowledge related to the manufacture of rice milling machines to improve the productivity of community agricultural products. The method of community service is in the form of assistance in manufacturing rice milling machines with a total of 34 participants. The media used is a direct practice in the form of training and assistance. After the training and assistance activities, a post-test was conducted to measure the level of understanding of group members and the community. The results of this community service show that there is an increase in insight and understanding related to the manufacture of rice milling machines. Thus, it is hoped that the community will be able to operate the equipment and work sustainably, and be able to make rice milling machines in the future.
Perancangan Mesin Pencacah Polimer Komposit untuk Aplikasi Komponen Fuel Cell Maulana, M Rizky; Fauji S, Ahmad; Iswandi, Iswandi; Umroh, Bobby
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.285

Abstract

This study aims to design a composite polymer shredding machine with a capacity of 50 kg/h to enhance recycling efficiency. The machine is powered by a 3 HP electric motor, equipped with a 1:50 ratio reducer and 200 mm diameter blades. Technical analysis encompasses calculations of cutting force, torque, and throughput, supported by CAD/CAE modeling to validate the structural design. The results show a shredding capacity of 833.33 g/min, cutting force of 47.088 N, and torque of 9.4176 Nm. The machine features a compact, energy-efficient design and delivers consistent output. A UNP steel frame ensures structural stability against dynamic loads. With good efficiency and sustainability, this design is suitable for small to medium-scale industries involved in composite polymer material processing.
Studi Performa Mesin Pencacah Polimer Komposit Berbasis Uji Laboratorium Sianturi, Danial Jack Marbis; Tumangger, Theo Fredrik; Aldori, Yopan Rahmad; Iswandi, Iswandi; Umroh, Bobby
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.290

Abstract

Polymers are the result of monomer polymerization with a lower density than metals but a much smaller elastic modulus, making them less rigid and strongly affected by temperature. This study evaluates the performance of a laboratory-scale crushing machine for polypropylene blended with activated carbon at varying compositions. The machine employed carbon steel rotary blades driven by a 1 HP electric motor through a gearbox transmission. Results showed average crushing times of 3.5–4 minutes/kg. Pure polypropylene produced a 72% fine fraction, while adding 10% activated carbon reduced it to 65%. Crushing efficiency remained above 85%, demonstrating stable performance and feasibility for composite material applications.
Co-Authors Ahmad Marabdi Siregar Aldori, Yopan Rahmad Alfifto, Alfifto Amiruddin, Arfis Amru Siregar Dadan Ramdan Darianto, Darianto dedi kurniadi Elapri, Bima Yoel Fauji S, Ahmad Glusevic, Jean Harahap, Uun Novalia INDRA HERMAWAN Iswandi Iswandi Jufrizal Jufrizal Maulana, M Rizky Muhammad Idris Nainggolan, Danis Prawoto, Yogi Purba, Jepriadi Rahmatullah . Salqaura, Siti Alhamra Sarjana, SS Siagian, Martua Sangap Siahaan, Muhammad Yusuf Rahmansyah Siahaan, Muhammad Yusuf Rahmansyah Sianturi, Danial Jack Marbis Sipangkar, Rinto Supardi Sofyan, Azwir Tumangger, Theo Fredrik Zulfikar, Achmad Jusuf zulfikar, Achmad Jusuf Zulfikar, Achmad Jusuf