Rauwendaal Extrusion engineering, Inc.
530.269.1082/ fax 530.269.1084
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Die Design Seminar

April 2-3, 2009

At The Conair Group

200 West Kensinger Drive
Cranberry Township, PA 16066


For Questions Contact: Sietske Rauwendaal 530-269-1082 or sietske@rauwendaal.com


About the Seminar

The seminar presents an intensive introduction to die design for plastic extrusion. 
The objectives of this seminar are:

  • to teach the basic principles of die design
  • to demonstrate the application of these principles to the design of the main types of extrusion dies:   
    • tubing and pipe dies, wire coating dies, sheet and flat film dies, profile dies, spiral mandrel dies, and coextrusion dies. 
  • to discuss the design of calibrators
Two recognized experts will be the instructors for the seminar.

What the attendees will learn:

  • the flow properties that determine how the material behaves in the die and when it leaves the die
  • the various types of extrusion dies used for different products
  • materials and coating used for extrusion dies
  • simple calculations for die design
  • how computer programs can be used to analyze and design extrusion dies
  • the advantages and disadvantages of various die geometries, e.g. the conventional pipe die versus the spiral mandrel pipe die
  • various die flow problems and how to avoid them
Who should attend:
  • Die designers
  • Process engineers
  • Manufacturing engineers
  • Extrusion supervisors
  • Technical service personnel


Registration Information, Fees & Canceling, Location & Accomodations
Fees & Registration Form
Location and Accommodations & Seminar Hours & Cancellation Policy

Course Description
 • Overview of types of extrusion dies
 • Important melt flow properties
 • General rules & guidelines
 • Complicating factors in die design
     • Extrudate swell
     • Draw down           
     • Relaxation           
     • Shrinkage

Design of flat & annular dies

 • Computer aided die design
 • Flat sheet and film dies
     • Fish tail dies
     • Coathanger dies           
     • Horseshoe dies
     • Tubing and pipe dies
     • In-line dies
     • Crosshead dies       
•Wire coating dies
• Blown film dies
     • Spiral mandrel dies
     • Smooth mandrel dies       
     • Pancake dies
 • Coextrusion dies
     • Feed block system
     • Multi-manifold system   
     • Interfacial problems
     • Troubleshooting extruders

Profile Die Design
 • Conceptual design
 • Design parameters
 • Flow through profile dies
 • How to handle swell
 • Parabolic flow
 • Esthetics of the extruded profile
 • Statistics to improve extrusion
 • Actual die design and effect of
     • Plastic properties
    • Land length   
    • Preland           
    • Draw down       
    • Die material
 • Different types of calibrators
 • Friction sizing
 • External sizing with compressed air
 • External sizing with vacuum
 • Internal sizing
 • Precision extrusion pullforming

     Polymer Extrusion       

Books authored by Chris Rauwendaal:

  • Polymer Extrusion available with registration in any seminar for a discounted price of $70.00 Check appropriate box on registration form.
  • Understanding Extrusion
  • Troubleshooting the Extrusion Process
  • SPC in Injection Molding and Extrusion
  • Polymer Mixing
  • Mixing in Polymer Processing






















Copyright 2007 Rauwendaal Extrusion Engineering, Inc. 10556 Combie Rd P.M.B. 6677 Auburn, CA 95602-8908. 530.269.1082, fax 530.269.1084.
Information Request Form. / Technical Questions: chris@rauwendaal.com. / General Questions: sietske@rauwendaal.com. Website by Eloquence.