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Studi Eksperimental Nilai Kekerasan Semikonduktor ZnO terhadap Variasi Beban Kompaksi Agus Kurniawan; Bayu Prabandono; Sularman
Politeknosains Vol 15 No 2 (2016): Jurnal Politeknosains Volume 15 Nomor 2 - September 2016
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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One important process in manufacturing pellet material is a compaction. This research will study the hardness value at ZnO semiconductor material that is compacted with different pressure. The first material is pure ZnO that was grinded with agate mortar, filtered and compacted with pressure are 10 bar, 20 bar and 30 bar so the pellet form were shaped. The size of pellet is Æ 13 x 2 mm. Furthermore, these pellet sintered at temperature 1300oC than it will test by vikers microhardness testing. The testing result is that the greatest vikers microhardness at the material that is compact at 30 bar. The mean value of it is 213.85 Hv. The greater of compacting pressure given the higher value of the material's hardness. Nevertheless, the magnitude of compacting pressure must consider the ability of the compacting mold.

Material Semikonduktor ZnO Didoping Cu Untuk Meningkatkan Konduktivitas Thermal Bayu Prabandono; Agus Kurniawan
Politeknosains Vol 15 No 1 (2016): Jurnal Politeknosains Volume 15 Nomor 1 - Maret 2016
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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LGV (liquefied gas for vehicle) is one of the alternative fuel, which prioritized for a fuel diversification program of transportation sector in Indonesia. Having different characteristics and properties of gasoline fuel, the use of LGV fuel will have an effect on the working parameters of an engine. Based on that, this research is conducted to analyze the effect of using LGV fuel at a mass air flow rate and fuel rate in passenger cars. Through this research also expected as an act to support the diversification fuel program that proclaimed by Indonesia Government. Passenger cars used in this research have a different engine capacity, i.e., 1200 cc and 1500 cc. Measurement of mass air flow rate and fuel rate are performed with the throttle position variation (absolute throttle position) from 14% to 30% on third gear. The results obtained indicate that there is a decrease in air and fuel flow rate of 4% for the test car Honda Mobilio (1500 cc) and 2% for Mitsubishi Mirage (1200 cc). In addition, the air fuel ratio (AFR) of LGV fuel has the same range like fuel petrol mixing, the value of the measured air fuel ratio is 14.4-14.8 for Honda Mobilio and 13.5-14.6 for Mitsubishi Mirage. The lower value of fuel flow rate than gasoline fuel, prove that the use of the LGV fuel is more efficient and cheaper (due to the LGV price) than gasoline. In addition, LGV fuel also more environmentally friendly than gasoline fuel as seen from result of emission testing done by the most researchers.

Analisis Konsistensi Volume Output Pada Nozzle Barrel Mesin Mini Injeksi V-Line Menggunakan Material Plastik Polypropylene ExxonMobil AP03B Bayu Prabandono; Alex Satria Wibawa; Mirza Yusuf; Agus Kurniawan; Aditya Nugraha
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 5, No 2 (2024): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v5i2.21837

One of the processes commonly used in making plastic goods is the injection molding process. Every process in injection molding has a very important role. A less-than-perfect process will result in defects or failure in the product. To reduce product defects, one of the processes that must be researched is the barrel purging process. The purging volume on the mini injection machine using the V-line method is inconsistent, as evidenced by the fact that if the purging waste, or what is usually called an avalanche is weighed, it will produce a non-uniform mass. This research uses a mini injection machine with the V-line method which has 2 main steps to carry out the plastic injection process; dosing and injecting. Unlike injection engines in general, this engine does not have a check-ring to withstand back pressure. This machine uses a shut-off system as a replacement for the check-ring role. This machine has never been subjected to a purging volume consistency testing process. The consistency of the purging volume greatly influences the product uniformity results. The research method used in this final assignment is direct. Data collection and test specimen collection will be taken directly on the mini injection machine using the V-line method. The steps taken in this research are planning, taking data, taking test specimens, processing test specimen data, and comparing test specimen data to obtain analysis results. The research results show that the mini V-line injection machine cannot support mass production, because increasing the screw rotation speed will affect the consistency of the volume of plastic that will be produced in the barrel, causing production to not run quickly and precisely.

Analisis Kekuatan Tarik Campuran Material ABS LG HI121H Dengan ABS Daur Ulang Prakoso, Redemptus Didik; Budiarto, Stevanus Hanung Tri; Nugraha, Aditya; Nugroho, Yohanes; Prabandono, Bayu
Jurnal Ilmiah Teknik Mesin Vol 12 No 2 (2024): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/jitm.v12i2.9894

Pembuatan produk plastik mayoritas menghasilkan limbah plastik yang cukup banyak. Penggunaan limbah plastik dalam pembuatan produk ditujukan untuk mengurangi harga jual dengan tetap menghasilkan produk dengan kualitas baik. Namun penggunaan limbah plastik dalam proses injection molding untuk membuat produk baru belum banyak dimanfaatkan karena keterbatasan data karakteristik kualitas produk yang dihasilkan. Penelitian ini bertujuan untuk mengetahui parameter injeksi terbaik yang menghasilkan kekuatan tarik produk yang paling optimal pada campuran 70% ABS LG HI121H murni dan 30% ABS LG HI121H daur ulang, mengetahui pengaruh paramater, serta mengetahui pengaruh prosentase campuran. Penelitian ini menggunakan metode Taguchi untuk memperoleh kombinasi terbaik parameter proses injeksi dan metode ANOVA untuk mengetahui pengaruh faktor parameter yang digunakan. Parameter yang digunakan masing-masing 3 level yaitu melt temperature 200°C, 225°C, dan 250°C; holding pressure 27 bar, 30 bar, dan 33 bar; cooling time 53s, 55s, dan 57s; serta injection speed 25 mm/s, 30 mm/s, dan 35 mm/s. Hasil penelitian menunjukkan bahwa untuk memperoleh hasil kekuatan tarik terbaik, parameter melt temperature 200°C, holding pressure 30 bar, cooling time 53 s, injection speed 25 mm/s dengan kekuatan tarik rata-rata sebesar 46,59 Mpa yang diuji melalui uji konfirmasi. Faktor yang mempengaruhi hasil kekuatan tarik adalah melt temperature sebesar 89,73%, holding pressure 1,72%, cooling time 0,34%, injection speed 0,95%, sedangkan 7,26% adalah faktor error. Penggunaan material ABS dengan prosentase campuran 70% ABS murni dengan 30% ABS daur ulang menyebabkan penurunan kekuatan tarik dengan angka sebesar 46,59 Mpa lebih rendah dibandingkan dengan kekuatan tarik dari material 100% ABS murni yaitu 56,4 Mpa.

Analisis Konsistensi Volume Output Pada Nozzle Barrel Mesin Mini Injeksi V-Line Menggunakan Material Plastik Polypropylene ExxonMobil AP03B Bayu Prabandono; Alex Satria Wibawa; Mirza Yusuf; Agus Kurniawan; Aditya Nugraha
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 5 No. 2 (2024): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v5i2.21837

One of the processes commonly used in making plastic goods is the injection molding process. Every process in injection molding has a very important role. A less-than-perfect process will result in defects or failure in the product. To reduce product defects, one of the processes that must be researched is the barrel purging process. The purging volume on the mini injection machine using the V-line method is inconsistent, as evidenced by the fact that if the purging waste, or what is usually called an avalanche is weighed, it will produce a non-uniform mass. This research uses a mini injection machine with the V-line method which has 2 main steps to carry out the plastic injection process; dosing and injecting. Unlike injection engines in general, this engine does not have a check-ring to withstand back pressure. This machine uses a shut-off system as a replacement for the check-ring role. This machine has never been subjected to a purging volume consistency testing process. The consistency of the purging volume greatly influences the product uniformity results. The research method used in this final assignment is direct. Data collection and test specimen collection will be taken directly on the mini injection machine using the V-line method. The steps taken in this research are planning, taking data, taking test specimens, processing test specimen data, and comparing test specimen data to obtain analysis results. The research results show that the mini V-line injection machine cannot support mass production, because increasing the screw rotation speed will affect the consistency of the volume of plastic that will be produced in the barrel, causing production to not run quickly and precisely.

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