Rauwendaal Extrusion engineering, Inc.
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Tubing & Profile Extrusion

May 13-15 , 2008
Harrel, Inc., E Norwalk, CT

 About the Seminar

The seminar presents a broad overview of tubing and profile extrusion technology.
The objectives of this seminar are:
• to teach the basic principles of extrusion
• to demonstrate how these principles can be applied to extrude tubing and profiles successfully and in a aboratory setting   
• to develop a good understanding of how the extrusion process works
• to provide information that allows you to improve extrusion operations at your company

Instructors
Chris Rauwendaal, Holton Harris, and Dave Madar will be the instructors for the seminar.

What the attendees will learn:
• what extruder components are critical to successful operation
• how to achieve stable extrusion and how to control the process
• how to select an extruder screw that will improve output and product quality
• the basic principles of die design
• how to troubleshoot extrusion problems systematically and efficiently
• to run an actual extrusion line manually and with full line control
• about startup and service of extruders

Who should attend:
• Extruder operators and technicians
• Process and manufacturing engineers
• Extrusion supervisors
• Technical service personnel
Registration Information, Fees & Canceling, Location & Accomodations
Registration Form
Fees, Cancellation Policy
Location and Accommodations & Seminar Hours

Course Description
Continued...
Main Extruder Components
• Screw & barrel
• Motor & reducer
• Heating & cooling
• The die

Important Material Properties
• Bulk properties
• Thermal properties
• Melt flow properties
• Other properties

Operational Principles of Extruders
• Solids  conveying
• Plasticating
• Melt conveying
• Venting
• Other functions

Instrumentation of the Extruder
• Temperature 
    • Sensors
    • On-off,  proportional, and 3-mode       controllers
    • Proper Adjustment
    • Deep and shallow sensing
• RPM
    • Analog vs. digital
    • RPM synchronization

Screw design
 • Standard extruder screw 
 • Variations on standard screw 
 • Mixing screws 
 • Barrier type screws 
 • Multi-stage screws for venting 
 • How to improve performance by
   optimizing screw geometry
Die Design
• In-line dies
• Crosshead dies
• Multi-lumen dies
Melt Pumps
• Theory
• Control
Troubleshooting the Extrusion Process
• Machine or material problems
• Wear problems
• Melting problems
• Melt conveying problems
• Solids conveying problems

Laboratory
During this demonstration you will have the opportunity to actually string up and operate a tubing line.  For tutorial purposes, operation will be manual, so that you can see how each of the adjustments on the line affects the final properties of the tubing.
After the regular laboratory session there will be a demonstration of "direct extrusion".  Using patented mixing techniques, recently developed by Dr. Rauwendaal, the functions of mixing additives and of precision extrusion, which formerly required a twin screw extruder plus a single screw extruder can now be accomplished totally within a single screw extruder (or MIXTRUDER)

Laboratory
Similar to Day 2. Except that this time you will be using free air extrusion to make bubble design (tapered tubing on a state-of-the-art line.  Both outer diameter and wall thickness of both large and small tubing sections will be under automatic control.  You will also be using the latest in Statistical Quality Control (SQC) techniques to monitor the quality level of the tubing.
After this laboratory session there will be a demonstration of the new ALTERNATE POLYMER extrusion system, whereby the polymer varies seamlessly from 100% polymer A to 100% polymer B along the length of the tube.
Statistical Quality Control
• Concepts and purpose
• Individual line
• Plant wide

Start-up and Service of Extruders
• Initial check-out
• Quick electrical checks
• Service tips

Afternoon Day 3
The seminar officially ends at 1 p.m.  However, participants are invited to remain as long as desired to get additional hand-on experience and to discuss special problems and applications.

Registration of this seminar is limited to Plastics Processors!


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
Book authored by Holton Harris

Extrusion Controls


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 
   
   

 

 
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: reto@rauwendaal.com or chris@rauwendaal.com. / General Questions: sietske@rauwendaal.com. Website by Eloquence.