This paper addresses the use of micro-injection moulding for the fabrication ofpolymeric parts with microfeatures. Five separate parts with different micro-feature designs are moulded of Polymethylmethacrylate. The design-of-experimentsapproach is applied to correlate the quality of the parts to the processingparameters. Five processing parameters are investigated using a screening half-factorial experimentation plan to determine their possible effect on the fillingquality of the moulded parts. The part mass is used as an output parameter toreflect the filling of the parts. The experiments showed that the holdingpressure is the most significant processing parameter for all the differentshapes. In addition, the experiments showed that the geometry of the parts playsa role in determining the significant processing parameters. For a more complexpart, injection speed and mould temperature became statistically significant. Adesirability function approach was successfully used to improve the fillingquality of each part.
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