Even though recently published results indicated that residual strains of the epoxy molding compound (EMC) play a key role on the warpage values and shapes of the plastic ball grid array (PBGA) packages, it is still unknown about how these residual strains build up and change during the manufacturing and infrared (IR) solder reflow processes. The purpose of this study is to quantify the residua...

This thesis presents a process planning methodology for a rapid injection mold tool manufacturing system that involves additive and subtractive techniques, whereby slabs are sequentially bonded and milled using layered tool paths. Mold tools are grown in a bottom up fashion, eliminating the need for multi-axis machining operations (beyond three axes) and allowing small features in deep cavities...

A part made of just one material (mono-material) is a new frontier in reducing environmental impact plastic, being 100% recyclable. The focus this work on the possibility controlling properties parts obtained by microinjection molding (μIM). μIM tests variothermal conditions are conducted an isotactic polypropylene. Two steps adopted: filling and packing stages at selected mold temperature, sub...

Abstract This paper presents a new smart web platform for plastic injection molds use in industry 4.0 environments. The requires as its only input the CAD model of part discrete format, accuracy analysis, thermoplastic material which will be manufactured and number parts to manufacture per year. Using this information through fully automated process based on hybrid algorithms developed by autho...