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All Journal Journal of Mechanical Engineering Science and Technology Jurnal Karinov
Muhamad Muhajir
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Humanities Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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PENERAPAN MESIN ROL PIPA HIDROLIS PADA BENGKEL MODIFIKASI KONSTRUKSI MOTOR TRAIL Heru Suryanto; Aminnudin Aminnudin; Sukarni Aminnudin; Yanuar. R. A. Pradana; Reddy .A. Dharmabintara; Muhamad Muhajir; Fakris Muslim
Jurnal KARINOV Vol 1, No 3 (2018): September
Publisher : Institute for Research and Community Service (LP2M), Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.781 KB) | DOI: 10.17977/um045v1i3p%p

Abstract

Penggunaan sepeda motor trail saat ini mulai meningkat, namun untuk sepeda motor trail baru terkendala oleh harga yang cukup mahal sehingga banyak bermunculan bengkel modifikasi motor trail. Dalam melaksanakan proses modifikasi dibutuhkan mesin rol pipa untuk membentuk bengkokan pada frame bodi motor. Oleh karena itu, tujuan penulisan ini adalah memberikan pemaparan tentang desain dan manufaktur serta aplikasi mesin rol pipa pada UKM mitra dibidang modifikasi konstruksi frame motor trail. Metode pelaksanaan yang digunakan meliputi observasi dan wawancara tentang kendala proses rol, mendesain dan membuat mesin rol pipa serta menguji kualitas produk rol pipa dan membandingkan dengan mesin pipa lama yang dipakai. Hasil kegiatan telah menghasilkan mesin rol pipa dengan sistem penggerak hidrolis dengan daya maksimum mencapai 9 ton, dengan kapasitas diameter pipa yang di rol lebih besar yaitu kisaran 0,5-2 inchi. Keunggulan dari mesin yang dibuat adalah rentang aplikasi diameter pipa yang digunakan lebih besar, kebutuhan ruang kerja yang lebih kecil, kebutuhan tenaga lebih sedikit, penggunaan lebih nyaman dan aman, serta hasil yang diperoleh lebih presisi.  Kata kunci— mesin rol pipa, konstruksi motor trail, hidrolis
Synthesis and Applications of Hematite α-Fe2O3 : a Review Muhamad Muhajir; Poppy Puspitasari; Jeefferie Abdul Razak
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (739.115 KB) | DOI: 10.17977/um016v3i22019p051

Abstract

This article reviewed the hematite α-Fe2O3, which focuses on its material properties, nanostructures, synthesis techniques, and its numerous applications. Researchers prepared the hematite nanostructure using the synthesis methods, such as hydrothermal, and, further, enhanced it by improving the techniques to accommodate the best performance for specific applications and to explore new applications of hematite in humidity sensing.
Effect of Homogenization Pressure on Bacterial Cellulose Membrane Characteristic Made from Pineapple Peel Waste Muhamad Muhajir; Heru Suryanto; Yanuar Rohmat Aji Pradana; Uun Yanuhar
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 6, No 1 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v6i12022p034

Abstract

Many studies were conducted to maintain the environment by reducing the waste, especially pineapple peel waste. This study aims to explore the effect of various pressure of the homogenization process on bacterial cellulose membrane surface morphology and structure produced using extract of pineapple peel waste. The methods include the preparation of pellicle samples from the product of the fermentation process of Acetobacter xylinum using a medium from the extract of pineapple peel waste. Bacterial cellulose pellicles were crushed using a blender. Mashed bacterial cellulose pellicle then homogenized in High-Pressure Homogenizer with pressure variation of  0 bar, 150 bar, 300 bar, 450 bar, dan 600 bar then cast into a mold. The bacterial cellulose solutions were dried in an oven at 60°C for 8 hours. The dried bacterial cellulose membrane was analyzed using XRD for the structure and SEM analysis for the morphology. The results indicate that the crystalline properties of BCM were shifted after being treated by various pressure processing in a High-Pressure Homogenizer. It was found that the High-Pressure Homogenizer with higher pressure reduced the peak intensity, decreased crystalline index from 87% to 70%, and decreased the degree of crystalline from 88% to 77%  without changing the cellulose structure. The higher pressure of the homogenization process causes the porosity of the membrane to be decreased.
Co-Authors Aminnudin, Aminnudin Fakris Muslim Heru Suryanto Jeefferie Abdul Razak Pradana, Yanuar Rohmat Aji Reddy .A. Dharmabintara Rr. Poppy Puspitasari Uun Yanuhar Yanuar. R. A. Pradana