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Optimization of Injection molding Parameters using the Taguchi Method to Maximize Biocomposite Material Tensile Strength Sufiyanto Sufiyanto
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (824.047 KB)

Abstract

This research explained a study for optimization of parameters process on the injection molding biocomposite material, which is a mixture of plastics and natural fibers. Natural fibers used is rice husk (RH) mixed with polypropylene (PP) and maleic anhydride polypropylene (MAPP). The biocomposite molded into tensile specimens ASTM D638-03 using the injection molding machine. The varied of injection molding is the parameters process, that are divided into 4 parameters and each consists of 3 levels, then be done tensile tests on specimens. Optimization performed using the Taguchi method with orthogonal matrix design L27(313). The maximum tensile strength of biocomposite were barrel temperature of 210°C, injection pressure of 55 bar, holding pressure of 40 bar, and injection velocity of 75 mm/sec
The Application of Rapid Upper Limb Assessment (RULA) for Designing a Lab-scale Flexible Conveyor Basirun Chaniago; Sufiyanto Sufiyanto; Lilia Trisyathia Quentara
Jurnal Teknik Mesin Vol 11 No 1 (2021): Jurnal Teknik Mesin Vol.11 No.1 April 2021
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2021.v11.i1.86-94

Abstract

The limited area of laboratory space (3000 x 3000 mm) triggered the importance of designing a flexible conveyor to support practicum activities. The process design of flexible conveyor consist of 1) Planning and preparation of product specifications; collection of product ideas based on needs and material selection. 2) Designing concepts; product dimensions with anthropometric data approach eg. elbow height, forward knee height and hand grip distance. 3) Product design; schemes or sketches that are developed into products or technical objects. 4) Pictures and specifications of product manufacture; complete review of all product elements with geometry, dimensions and material. The Rapid Upper Limb Assessment (RULA) method is used to analyze product function by investigating disorders of the upper limbs consisting of group A; upper arm, forearm, wrist, and wrist rotation, then group B; neck, torso, and feet, which are measured by the degree of injury risk. From the anthropometry approach a flexible conveyor specification was obtained with a length of 2000 mm, a width of 610 mm, a minimum height of 544 mm, and a maximum height of 957 mm. The results of the final score assessment of the standing posture and sitting position that the RULA action category is 4, with a small level of risk and for action to take some time to come.
Modifikasi Alternator dan Sistem Kelistrikan Untuk Peningkatan Daya Listrik Sepeda Motor 125 cc Alfi Tranggono Agus Salim; Eko Darmawan; Yoga Ahdiat Fakhrudi; Izhary Siregar; Balkhaya Balkhaya; Muhammad Anhar Pulungan; Sufiyanto Sufiyanto; Thenny Daus Salamoni
Jurnal Energi dan Teknologi Manufaktur Vol 2 No 02 (2019)
Publisher : Polinema Press, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jetm.v2i02.46

Abstract

The alternator on the motor is one component of the vehicle that can be used to improve its utilization. Modifications to the alternator on the vehicle are made to increase electric power. The working principle of an electric generator is in accordance with the law of faraday if a conductor is rotated in a magnetic field until it crosses the magnetic force line (GGM), it will cause an electric force line (GGL) in volts at the end of the conductor. In the alternator to be used, the lighting coil resistance is 0.24 - 0.36 Ω and the charging is 12.3 - 13.3 V at 1500 rpm. The research conducted was an experiment by comparing the alternator output voltage before it was modified with the alternator output that had been modified. Modification of the alternator is done by the method of load variation and replacement of the diameter of the coil along with the number of turns on the alternator. Measurement of alternator before and after modification shows results that are directly proportional to the output of the alternator at 1,000 rpm - 8,000 rpm. The results of three tests can be concluded that the modification of the alternator has increased from 6.42 A for the standard alternator to 13.7 A for the modification alternator.