Rauwendaal Extrusion Engineering, Inc. - California, USA

Title: Efficient Troubleshooting of Extrusion Problems

Symposium: Extrusion & Compounding

Educational Background

Delft University of Technology (T.U. Delft), post graduate degree in Mechanical Engineering, 1973

Twente University of Technology, doctorate in Mechanical Engineering; specialization in Polymer Processing, 1988

Professional Experience

1973 - 1977 Development engineer with American Enka Company, Enka, NC. Work involved development of improved processes and equipment for polymer melt spinning. A significant amount of mathematical modeling and computer simulation was done as part of the development function.
1977 - 1990 Manager Process Engineering in Corporate R&D with Raychem Corporation, Menlo Park, CA. Work involved a wide variety of polymer processing operations: compounding, extrusion, molding, post forming operations, polymer characterization, and polymer rheology. Manager Extrusion Technology in the Manufacturing Process Development Division of Raychem. Responsibility for all sheet extrusion (production and development), wire coating, tubing extrusion, blown film extrusion, and coextrusion activities in the Manufacturing group. Also internal consultant on process related problems and activities.
 1990 - present President of REE, Inc, Auburn, CA. REE provides design services, problem solving, process and material analysis, extrusion equipment, and training for the polymer processing industry. REE develops simulation software for extrusion as well as computer based, interactive training programs for the plastics industry and new extrusion technologies. REE also provides expert witness services.
  Teaching experience:
1979 - 1985 Instructor for U.C. Berkeley Extension, teaching polymer processing
1979 - 2004 Seminar instructor for Society of Plastics Engineers, conducting seminars on extrusion and statistical process control
1984 - present Guest lecturer at University of Minnesota at Minneapolis, the University of Massachusetts at Amherst, the University of Akron, Ohio, the University of Wisconsin, Madison lecturing on the engineering aspects of polymer extrusion. Presented seminars in Brazil, Mexico, Colombia, Chile, the Netherlands, Germany, England, France, Switzerland, Italy, Sweden, Portugal, South Africa, Australia, New Zealand, Thailand, Malaysia, Singapore, China, Japan, and Indonesia.
1991 - 2000 Seminar instructor for the University of Wisconsin at Milwaukee, teaching seminars on Extrusion, Mixing and Compounding, and Extrusion Die Design
1998 - present Instructor for Rauwendaal Extrusion Engineering, Inc. teaching seminars (both public and in-house) on fundamental principles of extrusion, advanced extrusion, screw design, die design, twin screw extrusion, foam extrusion, rubber extrusion, troubleshooting extrusion problems, sheet extrusion, film extrusion, statistical process control in extrusion and injection molding, blow film extrusion, film extrusion, profile extrusion, tubing extrusion, mixing and compounding, etc.


1976 American Enka's Presidents Award for development of new patented screw design 1983 and 1986 Best paper awards of the Extrusion Division of the SPE 1988 Inducted into Raychem Thermofit Division Hall of Fame for contributions leading to significant increases in production rate and process stability 1992 Inducted as a Fellow of the Society of Plastics Engineers 2003 Best paper award of the Injection Molding Division of the SPE

Other activities:

1983 Technical Chairman for Mixing in Polymer Processing at Golden Jubilee Meeting of AIChE 1987 Technical Program Chairman Extrusion Division for SPE Annual Technical Conference 1988 Chairman of the Board of Directors of SPE Extrusion Division 1990 Member Editorial Board of Advances in Polymer Technology. 1990 and 1991 Extrusion Symposium Chairman for annual meeting of Polymer Processing Society. 2008 Technical Program Chairman 1st Plastic Extrusion Asia Conference, Bangkok, Thailand 2010 Technical Program Chairman 2nd Plastic Extrusion Asia Conference, Kuala Lumpur, Malaysia


US#4,129,386 Extruder Screw to Increase Throughput US#4,237,441 Low resistivity PTC Compositions GB#2,036,754 B Low resistivity PTC Compositions US#4,688,306 Piezoelectric Coaxial Cable US#4,798,473 Extruder Screw to Reduce Energy Use US#5,909,958 Adjustable Grooved Feed Extruder US#5,932,159 Screw Extruder with Improved Dispersive Mixer US#6,136,246 Screw Extruder with Improved Dispersive Mixing Elements US#6,709,147 Intermeshing Element Mixer


Available upon request.


Over 200 papers, 7 books, 2 video training courses, 2 interactive training courses, and 5 book chapters (a complete list is available).