Determination Of Dimensional Accuracy Of A Part By Silicone Rubber Mold Using Taguchi Method

Mohd Basir, Mohamad Faris (2017) Determination Of Dimensional Accuracy Of A Part By Silicone Rubber Mold Using Taguchi Method. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Rapid Tooling Technology is one of technology in Rapid Manufacturing.Rapid Tooling is the process that used functional model from CAD data to produce a parts in less time and at a lower cost.Vacuum casting process is a one of the method in Rapid Tooling Technology.The part produced by vacuum casting has it accuracy varies with the changes of the process parameters of the machine such as resin temperature,vacuum pressure time,mould temperature and some others.In order to achieve the optimum accuracy of the produced part,the Taguchi method was applied.It is a simplified yet powerful method for experimental design using the orthogonal array method.In this project,an orthogonal array of L’9 is used with 3 parameters which are,resin temperature,mould temperature and vacuum pressure time.The experiment was setup by involving the process of pattern making,silicone rubber mold and pouring in vacuum chamber.Then 9 sample have undergone process of measuring by Coordinate Measuring Machine (CMM).Thus,result of measurement of 9 samples have to be compared to CAD data to get the percentage of accuracy.Besides that,the measurement result is analysed using Taguchi method to determine the optimum parameter condition.The result shows that the percentage of accuracy for every sample is obtained.Besides that,the optimized parameter condition is for resin temperature, mould temperature and vacuum pressure time are 30°C, 60°C and 5 min respectively.The comparison result between default parameter and optimum shows that the shrinkage value of the part is improved by 0.176 mm.Hence,the optimize parameter is obtained and the objective is achieved.

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