El Cerrito, CA 94530 USA   Telephone: (301)758-7788   E-mail: algriff@griffex.com

Quick Links: Seminars and Webinars, Manuals, Consulting, Contact, Technical Articles


1.  Live one-day public seminars: Introduction to Extrusion

No live seminars are scheduled in the near future because of the virus danger. You can always attend the Virtual Seminar, with all the 185 slides I use in the live seminar, but without waiting or traveling. For further information, call me at 301-758-7788 (Pacific time) or email algriff@griffex.com

Scroll down after Item 3, Webinars, for a summary of content.

2.  Private sessions at factory locations

These are based on the seminar outline below, Introduction to Extrusion, but adapted to individual needs and interests. Charges are $2500 for the first day and $1500 for each additional day, plus expenses, plus travel time at $75/hour, and these remain the same no matter how many people attend.  Some sessions are focused on training of operators and technicians, others include trouble-shooting and consulting, and hours can be adapted to fit production needs.  Typical sessions are one or two days, sometimes more to accommodate shift schedules.  It is possible to do this by teleconference or videoconference, but the best training is still by direct encounter, plus my direct observation of the equipment and products.

3.  One-Hour Webinars (E-training sessions).

Between 2010 and 2013, I presented 16 1-hour free webinars.  We had a typical registration of over 500 and in a few cases we went over 1000!  I still do webinars from time to time, hosted by Plastics Today. See home page for more detail. The following past webinars are available (PowerPoint slides only) from me on request.

"The Ten (11) Key Principles of Extrusion"  Mechanical, thermal, speed, heat transfer, inpush, costs, power needs, output, the vital signs, shear rate and barrel-motor balance.

"Plastics Chemistry for Non-Chemists"  An easy-to-understand cartoon-based explanation of how monomers become polymers.

"Plastics in the Environment"  Major issues (bag ban, phthalates, BPA, more) and reasons for the massive misunderstandings.

"Testing Incoming Raw Materials"  Why you should be testing and how to do it.

Questions on content or availability, call me at 301-758-7788 or reply by email to algriff@griffex.com.

Content of the Seminars: Introduction to Extrusion

This is an outline of the practical extrusion seminar that I have presented since 1979, and attended by over 5,000 people since then.  It is an intensive introduction for people in the extrusion business.

Part I -- Introduction
We first discuss the ten (11) key principles of extrusion, then get some basics in plastics chemistry (plastics are polymers with additives).

Part II -- Hardware
Motors, drive systems, speed reduction, screw and barrel, the head zone, instrumentation (the vital signs) and other hardware such as screens and screeners, static mixers and gear pumps.  In private sessions we cover appropriate dies and downstream equipment.

Part III --  Science and Engineering
Limits to output rate, how to estimate both inpush and output, and what happens in the various zones of the extruder, the head and die.  Simple practical rheology: melt index, IV and K-values, torque rheometry and shear rate, and why these things are important.

Part IV -- Operation and Troubleshooting
Setting conditions, how controllers work, start-up and shutdown, safety and maintenance. Common problems in extrusion, with suggested solutions and ways to prevent them from happening at all.

For more information call 301-758-7788 or e-mail algriff@griffex.com.

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