Mohd Azaman Md Deros, Dr.This page provides access to scholarly publication by UniMAP Faculty members and researchershttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/433942024-03-28T11:43:14Z2024-03-28T11:43:14ZOptimization and numerical simulation analysis for molded thin-walled parts fabricated using wood-filled polypropylene composites via plastic injection moldingMohd Azaman, Md DerosMohd Sapuan, SalitShamsuddin, SulaimanEdi Syams, ZainudinKhalina, Abdanhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/443292016-12-03T03:28:18Z2014-07-01T00:00:00ZOptimization and numerical simulation analysis for molded thin-walled parts fabricated using wood-filled polypropylene composites via plastic injection molding
Mohd Azaman, Md Deros; Mohd Sapuan, Salit; Shamsuddin, Sulaiman; Edi Syams, Zainudin; Khalina, Abdan
Plastic injection molding is discontinuous and a complicated process involving the interaction of several variables for control the quality of the molded parts. The goal of this research was to investigate the optimal parameter selection, the significant parameters, and the effect of the injection-molding parameters during the post-filling stage (packing pressure, packing time, mold temperature, and cooling time) with respect to in-cavity residual stresses, volumetric shrinkage and warpage properties. The PP+60 wt% wood material is not suitable for molded thin-walled parts. In contrast, the PP+50 wt% material was found to be the preferred type of lignocellulosic polymer composite for molded thin-walled parts. The results showed the lower residual stresses approximately at 20.10 MPa and have minimum overpacking in the ranges of -0.709% to -0.174% with the volumetric shrinkage spread better over the part surface. The research found that the packing pressure and mold temperature are important parameters for the reduction of residual stresses and volumetric shrinkage, while for the reduction of warpage, the important processing parameters are the packing pressure, packing time, and cooling time for molded thin-walled parts that are fabricated using lignocellulosic polymer composites.
Published online in Wiley Online Library (wileyonlinelibrary.com)
2014-07-01T00:00:00ZOptimization of blending parameters and fiber size of kenaf-bast-fiber- reinforced the thermoplastic polyurethane composites by Taguchi methodEl-Shekeil, Y. A.Mohd Sapuan, SalitMohd Azaman, Md DerosJawaid, M.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/443282016-12-03T04:47:05Z2013-01-01T00:00:00ZOptimization of blending parameters and fiber size of kenaf-bast-fiber- reinforced the thermoplastic polyurethane composites by Taguchi method
El-Shekeil, Y. A.; Mohd Sapuan, Salit; Mohd Azaman, Md Deros; Jawaid, M.
“Kenaf-fibers- (KF-)” reinforced “thermoplastic polyurethane (TPU)” composites were prepared by the melt-blending method followed by compression molding. Composite specimens were cut from the sheets that were prepared by compression molding. The criteria of optimization were testing the specimens by tensile test and comparing the ultimate tensile strength. The aim of this study is to optimize processing parameters (e.g., processing temperature, time, and speed) and fiber size using the Taguchi approach. These four parameters were investigated in three levels each. The L9 orthogonal array was used based on the number of parameters and levels that has been selected. Furthermore, analysis of variance (ANOVA) was used to determine the significance of different parameters. The results showed that the optimum values were 180°C, 50?rpm, 13?min, and 125–300?micron for processing temperature, processing speed, processing time, and fiber size, respectively. Using ANOVA, processing temperature showed the highest significance value followed by fiber size. Processing time and speed did not show any significance on the optimization of TPU/KF.
Link to publisher's homepage at https://www.hindawi.com
2013-01-01T00:00:00ZNumerical simulation analysis of unfilled and filled reinforced polypropylene on thin-walled parts formed using the injection-moulding processMohd Azaman, Md DerosMohd Sapuan, SalitShamsuddin, SulaimanEdi Syams, ZainudinKhalina, Abdanhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/440852016-11-18T08:07:18Z2015-01-01T00:00:00ZNumerical simulation analysis of unfilled and filled reinforced polypropylene on thin-walled parts formed using the injection-moulding process
Mohd Azaman, Md Deros; Mohd Sapuan, Salit; Shamsuddin, Sulaiman; Edi Syams, Zainudin; Khalina, Abdan
Thin-walled moulding technology has attracted increasing attention, particularly in electronic packing applications. The injection moulding of shallow, thin-walled parts with a thickness of 0.7 mm was performed using three types of materials from polypropylene, PP (PP, PP + 50 wt% wood composite, and PP + 10 wt% glass fibre composite). The highest deflection resulting from PP + 50 wt% wood does not occur in the critical area of the thin-walled part compared with PP + 10 wt% glass fibre. In addition, the results revealed that the warpage at the midpoint of the part surface injected using PP + 50 wt% wood is 0.04 mm lower than the value of 0.08 mm obtained when injected using PP + 10 wt% glass fibre. The warpage was hypothesised to result from the residual stress caused by nonuniform volumetric shrinkages formed during the solidification phase.
Link to publisher’s homepage at https://www.hindawi.com
2015-01-01T00:00:00ZNumerical simulation on moulded thin-walled parts via injection moulding processAzaman, Md DerosMohd Sapuan, SalitShamsuddin, SulaimanEdi Syams, ZainudinKhalina, Abdanhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/440302016-11-17T03:37:19Z2014-06-01T00:00:00ZNumerical simulation on moulded thin-walled parts via injection moulding process
Azaman, Md Deros; Mohd Sapuan, Salit; Shamsuddin, Sulaiman; Edi Syams, Zainudin; Khalina, Abdan
The current trend in the industry is to produce thin, light weight, and environmental products. In this project, flat or shallow thin-walled parts were designed and moulded lignocellulosic polymer composites (PP + 50 wt% wood) to visualize the processability via moulding simulation. This studied focused on the filling, shear stress at wall, and in-cavity residual stresses behaviors. The shallow thin-walled part is preferable in moulding PP + 50 wt% wood due to economically in processing, low shear stress distribution and low residual stresses than the flat thin-walled part.
Link to publisher’s homepage at http://www.scientific.net
2014-06-01T00:00:00Z