Osayoghoghome Peter Aigbogun, Jacob Olaitan Akindapo
This study undertakes optimisation of a plastic injection moulded part using Autodesk Moldflow Insight. The focus of the study was optimisation of volumetric shrinkage, minimisation of sink marks, and reduction of part warpage. The top cover of an electric socket adaptor was modelled with Creo Parametric and the model imported into Moldflow where the feed system was defined. Processing parameters were set with Acrylonitrile Butadiene Styrene (ABS) chosen as the material. An initial analysis was carried out with the default packing profile. Further studies were carried out adjusting the pressure profile in each study till the recommended volumetric shrinkage was achieved. Volumetric shrinkage was successfully reduced from over 5% to 3.1% with variation in shrinkage reduced from 1.534% to 0.946%. Sink marks were reduced by 44.4% and uniform across points. Optimised packing pressure profile also reduced total warpage by 28.2%. The study established that differential shrinkage was the biggest contributor to part distortion.
Optimisation, Volumetric Shrinkage, Sink Marks, Warpage, Packing Profile, Injection moulding
Cite this paper
Osayoghoghome Peter Aigbogun, Jacob Olaitan Akindapo. (2022) Effect of Packing Profile on Optimisation of Plastic Injection Moulding Process. International Journal of Mechanical Engineering, 7, 19-28