Trexel Inc. has introduced its new Trexel T-Series SCF (Super Critical Fluid) delivery system, which is a gas delivery and dosing system based on Trexel's patented technology. The system is designed to convert gaseous CO2 or Nitrogen into a super critical fluid and reportedly precisely doses and injects the critical fluid into the plastizicing unit of the injection molding machine, creating a lower density microcellular material structure in the molded plastic part.
This new unit replaces the current series II system that has provided MuCell users with supercritical fluid (Nitrogen or CO2) injection for 10 years. The Series II technology originated with the need for continuous flow for extrusion and injection molding applications.
The company said the new T-Series system is designed specifically for injection molding applications to produce SCF on demand only. This eliminates any need for hardware mounted on the injection unit (so no interface kit required), and significantly extends the seal life on the booster pumps while reducing energy consumption. The optimized booster performance allows for maximum booster life.
The new controls on the T-Series are greatly simplified, and only require shot weight and percentage of SCF content. The system calculates everything else and optimizes SCF delivery during screw recovery. While the old system control was static, the new system control automatically responds to changes in molding parameters to consistently deliver the exact required dose of SCF. The new system includes a 15" PC based graphical touch screen user interface with graphical diagnostic screens, historical data collection and output via a USB port.
The standard T-Series version is configured for Nitrogen based super critical fluid but an available option allows molders to process either Nitrogen or CO2. There is also an option available for inline detection of Nitrogen purity in the gas supply line, assuring Nitrogen purity requirements are met especially in developing markets. Within the T-Series the T-200 is available for shot sizes 120 - 600gr and the T-300 for shot sizes 600 - 3000gr. The introduction of the new T-100 for very small shot sizes and T-400 for large part applications (shot sizes >3Kg) will come in mid 2014.