Radhwan Hussin, Ir. Ts.This page provides access to scholarly publications by UniMAP Faculty members and researchers.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/433152024-03-29T14:58:12Z2024-03-29T14:58:12ZHybrid mold: comparative study of rapid and hard tooling for injection molding application using Metal Epoxy Composite (MEC)Radhwan, HussinSafian, SharifNabiałek, MarcinShayfull Zamree, Abd RahimMohd Tanwyn, Mohd KhushairiMohd Azlan, SuhaimiMohd Mustafa Al Bakri, AbdullahMohd Hazwan, Mohd HanidWysłocki, Jerzy J.Bloch, Katarzynahttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/747532022-03-23T01:23:08Z2021-02-01T00:00:00ZHybrid mold: comparative study of rapid and hard tooling for injection molding application using Metal Epoxy Composite (MEC)
Radhwan, Hussin; Safian, Sharif; Nabiałek, Marcin; Shayfull Zamree, Abd Rahim; Mohd Tanwyn, Mohd Khushairi; Mohd Azlan, Suhaimi; Mohd Mustafa Al Bakri, Abdullah; Mohd Hazwan, Mohd Hanid; Wysłocki, Jerzy J.; Bloch, Katarzyna
The mold-making industry is currently facing several challenges, including new competitors in the market as well as the increasing demand for a low volume of precision moldings. The purpose of this research is to appraise a new formulation of Metal Epoxy Composite (MEC) materials as a mold insert. The fabrication of mold inserts using MEC provided commercial opportunities and an alternative rapid tooling method for injection molding application. It is hypothesized that the addition of filler particles such as brass and copper powders would be able to further increase mold performance such as compression strength and thermal properties, which are essential in the production of plastic parts for the new product development. This study involved four phases, which are epoxy matrix design, material properties characterization, mold design, and finally the fabrication of the mold insert. Epoxy resins filled with brass (EB) and copper (EC) powders were mixed separately into 10 wt% until 30 wt% of the mass composition ratio. Control factors such as degassing time, curing temperature, and mixing time to increase physical and mechanical properties were optimized using the Response Surface Method (RSM). The study provided optimum parameters for mixing epoxy resin with fillers, where the degassing time was found to be the critical factor with 35.91%, followed by curing temperature with 3.53% and mixing time with 2.08%. The mold inserts were fabricated for EB and EC at 30 wt% based on the optimization outcome from RSM and statistical ANOVA results. It was also revealed that the EC mold insert offers better cycle time compared to EB mold insert material.
Link to publisher's homepage at https://www.mdpi.com/journal/materials
2021-02-01T00:00:00ZMinimization on warpage defect in injection molding part of ABS (Acrylonitrile Butadiene Styrene) material by using design of experiment (DOE)Radhwan, HussinMohd Fidzwan, Md Amin HamzasAhmad Nabil, Mohd Khalilhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/443312016-12-03T04:41:56Z2014-11-01T00:00:00ZMinimization on warpage defect in injection molding part of ABS (Acrylonitrile Butadiene Styrene) material by using design of experiment (DOE)
Radhwan, Hussin; Mohd Fidzwan, Md Amin Hamzas; Ahmad Nabil, Mohd Khalil
Every plastic part that undergoes the plastic injection molding process will have the behaviour of warpage when it has cooled after injection process. It needs a proper way of controlling the rate of warpage, so it is between the accepted ranges. This paper research about a minimization on warpage defect in injection molding part of ABS (Acrylonitrile Butadiene Styrene) material by using Design of Experiment (DOE). The part chosen is from company which had a critical issue of warpage on one of the part produced. The approach of Taguchi method is applied for the optimization of process parameters selected which is the mold temperature, melt temperature, packing pressure, packing time, and cooling time. For this purpose, Moldflow Plastic Insight (MPI) software is used for the simulation of injection molding process. The number of simulation is based on the three level of L27 Taguchi Orthogonal Array (OA). The Minitab software is used to analyzed the result where the the S/N (signal-to-noise) ratio and analysis of variance (ANOVA) is utilized to see the most significant factors contribute to warpage. The confirmation test shows the best combination of process parameters using the Taguchi approach to minimize the warpage on the part.
Link to publisher's homepage at http://www.praiseworthyprize.com/
2014-11-01T00:00:00Z