A specially developed grade of engineering plastic may promote growth of molding technologies to produce tubular components with very complex geometries.
Ticona Engineering Polymers says the benefits of its new Fortron polyphenylene sulfide include:
- Higher melt strength,
- Improved impact resistance,
- Higher blow up ratio,
- Longer handling time, and
- No restriction regarding vibration.
“The advanced properties profile of this grade delivers a solution that allows original equipment manufacturers (OEMs) and general industry customers to produce high temperature air management and exhaust gas recirculation (EGR) systems that include components with complex shapes and contours,” said Peter Radden, Ticona automotive application development engineer. “The value to our customers is a material with high temperature resistance for harsh environments that can be shaped by one blow molding process into a duct with multiple 90 degree bends and intricate contours.”
Manufacturers can now use all available blow molding technologies — standard,
3D-suction, robot manipulation and injection — to create air inlet systems and EGR pipes with multiple bends while reducing the number of manufacturing steps and shortening cycle times, according to Ticona.
“The internal combustion engine remains an important part of the powertrain, even as the push for lighter and more efficient traditional, hybrid and pure electric vehicles continues,” Radden said. “While OEMs downsize their engines, they are pushing to increase the horsepower. This leads to higher operating temperatures and a more challenging environment with compact, more powerful engines in tighter engine compartments.”
Ticona is working with Röchling Automotive on a new air duct geometry that requires Fortron PPS, which was used in the first PPS automotive blow molded commercial application. In 2009 this blow-molded charge air pipe was awarded 1st place in the “Powertrain” category and a “Grand Award” in the collective “Parts & Components” category at the 12th Automotive Division Award of the Society of Plastics Engineers (SPE) Central Europe.
“Our new higher performance turbo charging systems required a redesign of the air ducts including extreme complex part geometry which can only be shaped through the 3D robotic manipulated blow molding process,” said Paolo Curci, Röchling Automotive advanced projects developer. “The Ticona engineers worked with us to tailor the material properties to our design and process. The ability to fine tune the material composition reduced the need to run extensive production scale trials.”
Fortron PPS is said to provide cost savings though lower reject rates, reduction in number of fabrication steps, shorter cycle times and higher process reliability. In addition, blow molded pipes can weigh up to 30 percent less than aluminum components.