A Polymer Process Engineering & Training Company Home of the CRD Mixing Screws
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May 15-16, 2014
Sheraton Sand Key Resort
Clearwater Beach, FL
Phone: 727-595-1611
by Chris Rauwendaal and Paul Waller
Printable Outline
About the Seminar
This seminar presents an in-depth discussion of Troubleshooting the Blown Film Process.
The objectives of this seminar are for students:
to understand blown film extrusion and operation
to understand how plastic properties affect extrusion and film properties
to be able to efficiently troubleshoot and solve blown film extrusion problems
Two recognized experts will be the instructors for the seminar.
What the attendees will learn:
to learn the basic principles of blown film extrusion
to learn about plastics used in blown film extrusion and plastic properties important in extrusion and in film properties
to learn about blown film downstream equipment
to learn the operational principles of extrusion
to learn how to troubleshoot general extrusion problems and specific blown film extrusion problems, such as bubble instabilities, poor optical properties, interfacial instabilities, etc.
Who should attend:
Extruder operators
Extrusion supervisors
Manufacturing engineers
Quality control personnel
Technical service personnel
Testimonial from previous Seminars
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Course Description
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Day 1, Chris Rauwendaal 1. Introduction & extruder hardware • Basic extruder components • Review of terminology • Screw and barrel • Feed system • Screw drive • Heating and cooling • Instrumentation and control 2. Plastic properties • What are plastics? • Plastics used in extrusion • Melt flow properties • Thermal properties • Viscous heat generation • Plastic quality control 3. Inside the extruder • Feeding • Solids conveying • Plasticating • Melt conveying and mixing 4. Extruder screws • Standard extruder screw • Variations on standard screw • Mixing screws • Barrier type extruder screws 5. Blown film dies • Side fed dies • Bottom fed dies • Spiral mandrel dies • Coextrusion dies • Oscillating dies 6. Operational principles • Startup procedures • Purging and changeover • Shut down procedures Books authored by Chris Rauwendaal: The following books are discounted when you register for a seminar. If you want to order check appropriate box on registration form.
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Course Description (continued)
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Day 2, Paul Waller
7. Downstream equipment • Comparison air ring systems • Optimizing air ring setup • Internal bubble cooling systems • Automatic gauge control • Bubble stabilizer systems • Effect collapsing systems on gauge variation and roll geometry • Surface treatment and limitations • Web tension control and optimization • Heat sealing and bag manufacturing 8. Troubleshooting • Requirements for efficient troubleshooting • Tools for troubleshooting • Systematic troubleshooting • Polymer degradation • Extrusion instabilities • Bubble instabilities • Air entrapment and gel problems • Die lines • Poor optical properties • Extrusion instabilities • Wear problems • Interfacial instabilities 9. Workshops • Eliminate melt fracture • Eliminate interfacial instability • Eliminate gels • Control bubble instability • Diagnose surface adhesion problems • Diagnose and eliminate wrinkles • Optimize heat seal strength • Diagnose and minimize gauge variation • Extruder temperature profiles • Diagnose and eliminate extruder surging • How to adjust for screw and barrel wear
Click on the image to find a description of the book. This book normally $149.00 is available with seminar registration for $125.00 |
About the Instructor:
Dr. Chris Rauwendaal has been a top seminar instructor for more than 25 years. He has taught with SPE, UWM & UC Berkeley & teaches many in-house courses. He is a well known plastics author. Chris has 30+ years experience in the plastics industry. His experience is in a wide range of extrusion operations, including fiber spinning, film, sheet, tubing, medical tubing & profile extrusion, coextrusion, and reactive extrusion. He has worked on both practical and theoretical problems such as screw & die design, troubleshooting, modeling and computer simulation, material analysis, failure analysis, etc. Chris has authored 6 books on extrusion and related fields.
Since 1990 he has been President of Rauwendaal Extrusion Engineering, Inc., a company that provides custom extruder screws and other extrusion hardware, training programs, engineering & expert witness services to the plastic industry. With screw design as his specialty, over the past 5 years REE had developed patented technologies in the following areas:
• Elongational Mixing Devices
• Mixing non-return valves
• Single screw compounding extruder
• Cooling screws for foam extrusion
For registration contact: chris@rauwendaal.com
For seminar content contact: chris@rauwendaal.com
