Plast-O-Foam LLC is a leading supplier of custom thermoplastic injection molding for automotive manufacturers and their suppl ... iers.It was founded in 1980 and integrated into Cignet LLC in 2000. Plast-O-Foam uses a team approach for every project. It includes a project manager, tool engineer, quality manager, purchasing/cost control manager and logistics coordinator. Together, this team analyzes the project and develops a plan to maximize quality, minimize costs and meet availability requirements for your project. read more