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Siti Aishah Wahid
Politeknik Sultan Mizan Zainal Abidin
Education Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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Design and development mini compression molding for teaching and learning Sullyfaizura Mohd Rawi; Suzilawati Alias; Siti Aishah Wahid
Education and Social Sciences Review Vol 1, No 2 (2020): Education and Social Sciences Review
Publisher : Indonesian Institute for Counseling, Education and Theraphy

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.986 KB) | DOI: 10.29210/07essr57300

Abstract

Compression molding is a major technology in the plastic industry, and the one of the original processing techniques for manufacturing plastic. The current study was aimed to design and fabrication of mini compression molding machine for use in laboratory workshop or education institution. This machine was designed and fabricated to reduce the cost of expensive purchasing and cost maintenance of compression molding machines used in the industry. Mini compression molding provides for study of implemented to facilitate the production process of plastic products according to the mold provided. This machine used an oven as a heater to melt the resin in the mold provided and car jack as pressure to compress the resin after melting. The parameter has been considered is a temperature and pressure of the process of flow raw material into the cavity and period time of melting. Based on the test, the optimize of temperature suitable for heating the polypropylene plastic (PP) to melt is at 250°C, while the best time to melt of at 250°C is within 15 minutes. From the results obtained based on the quality of mold produced by the mini compression molding machine, the fabricated machine performance was satisfactory and can be used locally institution and industrially in small scale. This Mini compression molding used in Manufacturing lab in PSMZA for subject of DJF2012 (Manufacturing Workshop Practice 2) as development aids in Teaching and Learning.
Optimization of magneto-rheological fluids on the volume fraction and viscosity for MR damper application Siti Aishah Wahid; Izwan Ismail
Southeast Asian Journal of Technology and Science Vol 1, No 1 (2020): Southeast Asian Journal of Technology and Science
Publisher : Indonesian Institute for Counseling, Education, and Therapy (IICET)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (645.979 KB) | DOI: 10.29210/81056700

Abstract

Magneto-rheological fluid (MR fluid) in squeeze mode able to produce stress resistance up to 80kPa which is exceeded most basic requirement of normal mechanical application.  However, to attain the good performance of stress resistance, the composition of MR fluids has to be optimized. The aim of this study is to investigate the optimum volume fraction of carbonyl iron particle (CIP), mineral oil (MO) and fumed silica (FS) for MR damper application. Simultaneously, the appropriate viscosity of MO is also studied.  Hence, MR fluid samples with various composition are synthesized and analysed according to combined D-Optimal mixture design (CDMD) design of experiment (DOE). The compression test was conducted to study the compression strength and compression modulus of each samples. The findings indicate that the volume fraction of CIP is the most significant factor to affect the compression stress and compression modulus of MR fluid. Increment of CIP volume fraction from 20vol% to 40vol% increased the compression stress from 0.12MPa to 10.95MPa. Moreover, the compression modulus increased from 0.24MPa to 27.24MPa. This study shows that MR fluid can be produced for MR damper by selecting higher magnetic particles composition. Optimization model produced in this study is crucial for composing aimed squeeze mode MR fluid for MR damper.
Co-Authors Izwan Ismail Sullyfaizura Mohd Rawi Suzilawati Alias