Trexel's new delivery system touted to reduce costs

MuCell microcellular foaming technology pioneer Trexel has launched its newly developed T-Series SCF (Super Critical Fluid) delivery system, which was shown at the K2013 show. The gas delivery and dosing system based on Trexel's patented technology is designed to convert gaseous CO2 or nitrogen into a super critical fluid and is said to precisely dose and inject the super critical fluid into the plastisicing unit of the injection moulding machine, creating a lower density microcellular material structure in the moulded plastic part.

This new unit replaces the current Series II system that has provided MuCell users injection for ten years. The Series II technology originated with the need for continuous flow for extrusion and injection moulding applications.

The new systems designed specifically for injection moulding applications 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 optimised booster performance allows for maximum booster life.

The new controls on the T-Series are simplified, and only require shot weight and percentage of SCF content. The system calculates everything else and optimises SCF delivery during screw recovery. While the old system control was static, the new system control is dynamic and automatically responds to changes in moulding parameters to consistently deliver the exact required dose of SCF. It also 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 moulders 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 - 600 g and the T-300 for shot sizes 600-3,000 g. The introduction of the new T-100 for very small shot sizes and T-400 for large part applications (shot sizes >3 kg) will come in mid 2014.


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