SUPER-G® Twin Screw Extrusion MultiRESN™ System
True multi-resin system, PTi offers self wiping screw technology resulting in quick product changeovers.
Vacuum Systems
The SGTSE® system relies on high vacuum to dry and de-volatilize the material as it is being extruded. Liquid ring vacuum pumps are industry proven and very well suited for this application. These pumps are designed to operate efficiently in environments where highly saturated vapors or particles will be present while providing years of reliable service life. The co-rotating feed screws of the SGTSE® system does not operate fully flooded with material, thus creating the ability to draw high vacuum over a large surface area on each side of a proprietary polymer seal section. Additionally this system runs at elevated screw speeds (up to 300 rpm) such that the high vacuum region (dual vacuum vent zones creates high vacuum over a 20+ L/D section of the machine) is under a constant state of renewal creating a highly efficient means for drying and devolatizing the extrudate as it's being processed. The vacuum circuits operate at a nominal vacuum pressure of 35 mbar. However, a unique system circuit design provides the capability to produce vacuum levels as high as 12 mbar should the process require it. As with any vacuum decontamination system regular cleaning is required.
Following a simple preventative maintenance schedule assures proper system function is maintained within the minimum amount of time and process interruption. The unique system design avoids the use of consumable filters or screens as part of its robust platform. Extracted moisture is condensed and stored for easy removal and proper disposal on weekly intervals.
Precise feeding and blending of the component materials is key to the success of the SGTSE process. Unlike single screw extruders, the twin screw extruders are starve fed.
A critical part of the process, especially for PCR (post-consumer recycled) materials containing higher contaminant levels. Filtration is accomplished using a screen changer to remove impurities from the melt stream.
Projected Savings from Reduced Energy Usage
The following chart indicates the different size SGTSE extrusion machines and how much hour usage can save money over time.
OFFERING YOU THE BEST SOLUTION FOR YOUR EXTRUSION LINE
Processing Technologies International (PTi) is a global leader in high-performance sheet extrusion machinery. Engineered to exact standards, PTi systems feature innovative design solutions that deliver superior equipment performance and consistently produce sheet goods that meet the industry’s highest quality standards.
PTi offers a comprehensive range of products and services designed to support today’s sheet producers and the evolving demands of the future. While this overview highlights many available configurations and capabilities, it represents only a portion of the customized extrusion solutions PTi provides for a wide variety of applications.