First, and possibly the most common, is injection ... the voids and get the air bubbles out). This results in a part that is similar to what would be made with injection molding, but with a ...
Recently [Stefan] of CNC Kitchen took a gander at using his gaggle of 3D printers to try injection molding (IM ... pressure inside the mold), adding air vents to improve flow and so on.
Equations of state, pvT applications, shrinkage and ejection forces ... Residual stress. Injection/compression flow. Reciprocation effects in screw plastication. Review of specialized injection ...