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All Journal REKAYASA JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN
Gunawan Budi Susilo
UIN Sunan Kalijaga Yogyakarta
Agriculture, Biological Sciences & Forestry Computer Science & IT Education Electrical & Electronics Engineering Engineering Mechanical Engineering Physics Social Sciences

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Pengendalian Kualitas Produk Downlight dengan Implementasi Simulasi Die Casting Trio Yonathan Teja Kusuma; Gunawan Budi Susilo; M Zulhan Iswanda
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.18839

Abstract

Die casting is a casting process in which molten metal is poured into a mold by injection using a piston driven by pneumatic/hydraulic energy. In some cases, the resulting product does not match the desired design because defects will occur if the configuration is not correct. There are several defects that commonly occur in the Die casting process such as cold shot, shrinkage, bubble, warping, undercut, etc. With the help of computers, these problems are expected to be reduced. Using inspire cast to visualize the injection process will facilitate the analysis of the Die casting process. With the help of this software, a better configuration can be created and implemented into the machine. However, the results are different, when simulating in the software it is said that the molten metal streams from different gates are above the recrystallization temperature of 665°C so it should harden and fuse better when the two molten metal streams meet. However, after implementing the new configurations into the machine, the process defects were still high at 23% for configuration 1 and 13% for configuration 2 compared to 6% for the existing configuration. However, implementing this software will reduce the cost of trial and error process to find a new configuration for a new material.
THE PERFORMANCE TEST OF DIESEL ENGINE WITH A COMBINATION OF BIODIESEL AND PYROLYSIS OIL Gunawan Budi Susilo; Beni Tri Sasongko
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 1 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i1.58504

Abstract

The need for fuels is increasing and almost entirely derived from fossil fuels. The one of technology to reduce fossil fuel consumption is the pyrolysis method. Pyrolysis is defined as a chemical degradation reaction caused by heat in the absence of oxygen. Pyrolysis of plastic waste into liquid fuels, using a batch reactor, is set at a temperature of 450oC. This study was conducted to determine plastic waste pyrolytic oil properties of LDPE50 %+ Other50 % blend, such as specific gravity, kinematic viscosity, pour point, water content, and ash content. The results of mass balance calculations produce 43,41 %wt liquid, 5,0 %wt solid, and 51,59 %wt gas. The results showed that the value of specific gravity was 0.881, kinematic viscosity 1.162 mm2s, pour point of -12oC, water content 0.8 %vol, and ash content 0.062 %wt.  Diesel engine performance which uses a mixture of fuel from a result of pyrolysis process of (5 %vol and 10%vol) and biodiesel (90 %vol and 80 %vol) are tested to the Engine Test Bed Nissan Diesel SD22 Series. The results showed that the maximum torque at 1800 rpm is 122.919 Nm, which has the same value as mixed plastic waste pyrolytic oil 10 %vol to 100 % biodiesel. Maximum power at 2500 rpm is 30.3259 kW, which has the same value as mixed plastic waste pyrolytic oil 10 %vol to 100 % biodiesel.
Co-Authors Beni Tri Sasongko M Zulhan Iswanda Trio Yonathan Teja Kusuma