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Articles by M.H.I. Ibrahim
Total Records ( 2 ) for M.H.I. Ibrahim
  K.R. Jamaludin , N. Muhamad , M.N. Ab. Rahman , S. Ahmad , M.H.I. Ibrahim , N.H. M. Nor , M.R. Harun and M.Y.M. Daud
  This study presents and demonstrates the effectiveness of optimizing multiple quality characteristics of the injection molding of the MIM green compacts via Taguchi method-based Grey analysis. The modified algorithm adopted here was successfully used for both detraining the optimum setting of the process parameters and for combining multiple quality characteristics into one integrated numerical value called Grey relational grade. The significant molding parameters were identified as (1) Injection Pressure (2) Injection Temperature (3) Powder Loading (4) Mold Temperature (5) Holding Pressure and (6) Injection Speed. In addition, the multiple quality characteristics required are: (1) less defects (2) strong and (3) denser compact. The result concluded that the powder loading (C) is very significant for the combination of the quality characteristics.
  M.H. Othman , W. Muhammad , W.N. Azrina , M.H.I. Ibrahim , S. Hasan , S.K. Hashim and S.Z. Khamis
  Now a days, plastic injection moulding for various types of polymer composites has been in high demand. However, an optimised processing condition is vital to ensure the desired properties of the product can be achieved.Therefore, this research was carried out to optimise the injection moulding processing condition of polypropylene-nanoclay-Gigantochloa Scortechinii. In this study, the L934 Taguchi Optimisation Method was used to obtain the optimum processing condition, which consist of the 9 trials, 3 levels and 4 processing conditions. The selected processing conditions were processing temperature, packing pressure, screw speed and filling time. In terms of material preparation, the Gigantochloa Scortechinii fibre was heated at a temperature of 120°C. The fibres were then mixed with polypropylene, polypropylene-grafted-maleic anhydride and nanoclay according to the formulation. The mixing process was performed using a roll mill mixer. Next, the flexural test samples were produced by using injection moulding process according to the orthogonal arrays setup from the Taguchi Optimisation Method. The flexural strength tests were done by using universal testing machine. As a result, the maximum flexural strength was 23.3380 MPa. The optimum value for processing temperature was 160°C, packing pressure was 112 MPa, screw speed was 144 rpm and the filling time was 3 seconds. In conclusion, the optimum processing condition has been achieved with factors that influenced flexural strength. This results can be used as a reference for future injection moulding manufacturing process.
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