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All Journal Jurnal Energi Dan Manufaktur Jurnal Teknik Mesin Indonesia Jurnal Teknik Mesin Sinergi
Ahmad Nurul Muttaqin
Politeknik Negeri Ujung Pandang
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Jurnal Teknik Mesin Sinergi

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Sifat Mekanis & Struktur Mikro Aluminium Paduan (Al-Si) Pada Pengecoran Dengan Menggunakan Cetakan Berputar Uswatul Hasanah Mihdar; Ahmad Nurul Muttaqin
Jurnal Sinergi Jurusan Teknik Mesin Vol 21, No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/sinergi.v21i1.4182

Abstract

This study aims to analyze the effect of variations in mold rotation speed and pouring temperature on the quality of casting aluminum alloy (Al-Si) which includes mechanical properties and microstructure. The selected speed variations are 200 rpm, 250 rpm, and 300 rpm. While the pouring temperature variations are 640oC, 660 oC, and 680 oC. The tests carried out were the hardness test and tensile test as well as a photo of the structure micro to be used to calculate the average grain size. The highest hardness value is found at 300 rpm with a temperature of 680 oC of 81.42 HB, while the lowest hardness value is found at 200 rpm with a temperature of 640 oC of 77.9 HB. The highest tensile strength is found at 300 rpm with a temperature of 660 oC 236.52 N/mm2 and the lowest tensile strength is at 250 rotations with a temperature of 680 of 171.92 N/mm2. The lowest average grain size value is found at 300 rpm rotation with a temperature of 680oC of 87.1781 µm, while the highest average grain size value is found at 200 rpm rotation with a temperature of 640 oC of 139.951 µm.
Volume Kerja dan Waktu Penggilingan Tongkol Jagung pada Ukuran Produk/ Morfologi dalam Proses Ball Mill Ahmad Nurul Muttaqin; Uswatul Hasanah Mihdar
Jurnal Sinergi Jurusan Teknik Mesin Vol 21, No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/sinergi.v21i1.4203

Abstract

The use of corncob powder is very wide in various industrial fields, namely as a source of dietary fiber, the basic material for making bio-plastics, partial replacement of cement in the manufacture of concrete, functional chemicals, oyster mushroom cultivation media. The most efficient method in producing corncob powder is the Ball Mill Process. The purpose of this study was to evaluate the effect of working volume and milling time on the characteristics of corn cob powder. The research procedures include specimen preparation (including cutting and drying processes) and milling processes. The results obtained were then characterized using a scanning laser microscope (LSM) to analyze the morphology and size of the product, lower working volume results in a smaller powder production with a needle-like sharp edge morphology and a higher work volume also results in a powder that has a blunt edge morphology. Although working volume can potentially be used to control particle size, this parameter has a direct effect on powder yield. As for the long milling time, it produces a smaller powder size than the faster milling time. 
Co-Authors Hairul Arsyad Onny Sutresman Rusdi Nur Uswatul Hasanah Mihdar