ANTEC 2012, Orlando, Fl  April 2 - April 4, 2012

January 25, 2012

Extrusion Basics

BENEFITS OF MEMBERSHIP--- COME JOIN US

Extrusion Search

Comments, questions, or information.  Click here and get advice from a vetted expert.

Webmaster:  Steve Derezinski,  Extruder Tech, Inc.

****************New Feature********************

Much of extrusion technology used today is rooted in works done years or decades ago.  CLASSIC ANTEC feature is dedicated to bring back some of the works that influenced the growth and development or the extrusion process, now and for years to come.  Click on the link to down load the first CLASSIC ANTEC, the visualization study presented by Bruce Maddock at the 1959 ANTEC.    

A Visual Analysis of Flow and Mixing in Extruder Screws

************************************************

WINTER NEWSLETTER IS HERE

Paper of the Month, January

MODELING OF NON-ISOTHERMAL FILM BLOWING PROCESS FOR NONNEWTONIAN
FLUIDS BY USING VARIATIONAL PRINCIPLES


Martin Zatloukal1,2, Roman Kolarik1,2
1Polymer Centre, Faculty of Technology, Tomas Bata University in Zlín, nám. T. G. Masaryka 275,
762 72 Zlín, Czech Republic
2Centre of Polymer Systems, Tomas Bata University in Zlín, nám. T. G. Masaryka 5555,
760 01 Zlín, Czech Republic

In this work, non-isothermal film blowing process
analysis for non-Newtonian polymer melts has been
performed theoretically by using minimum energy
approach and the obtained predictions were compared
with both, theoretical and experimental data (internal
bubble pressure, take-up force, bubble shape, velocity and
temperature profiles) taken from the open literature. For
this purpose, recently proposed generalized Newtonian
fluid depending on three principal invariants of the
deformation rate tensor, D, and its absolute defined as
D_D has been used. It has been found that film
blowing model predictions are in very good agreement
with the corresponding experimental data.

*********************************************************************************

EXTRUSION WIKI

www.extrusionwiki.com is the ultimate search engine for information specific to plastic extrusion.  It relies on over 5 decades of information compiled from the annals of the Society of Plastic Engineers Extrusion Division based works of past and present founders and recognized experts in the field.

**********************************************************************************

EMPLOYMENT

********************************************************************************

ANTEC 2011--  BOSTON, MA 

Wine and Cheese Reception:  Major Sponsors

A Wine and Cheese Reception followed the Awards Presentations.  Members could mingle with awards recepients to get aquainted and discuss the finer points of extrusion.  The Wine and Cheese major sponsors of the event are as follows.  Click on logo for link.

K-Tron International

MYUNG-IL FOAMTEC

NFM Welding Engineers Inc.

Polymer Diagnostics, Inc.

Polymer Processing Institute

R & B Holdings

Other contributors to the Wine and Cheese Reception

Dr. Mark Spalding (right) presented the Bruce Maddock Award to Dr. Gred Campbell.   

Dr. Paul Andersen on right presented the Lew Erwin Award to Mr. Jonathan Lee.

Ms. Polina Razina receives the Lew Erwin Award from Dr. Paul Andersen

Mr. Stan Jakopin receives the Distinguished Service Award from Mark Wetzel on the right.

Dr. Paul Andersen (right) presented the Heinz Herman Twin Screw Award to Dr. Costas Gogos.

Mark Wetzel on right presented the Best Paper Award to Dr. Greg Campbell (left) and Dr. Mark Spalding at the Awards Meeting of ANTEC 2011. 

AN ENGINEERING APPROACH TO THE CORRECTION OF ROTATIONAL FLOW

CALCULATIONS FOR SINGLE-SCREW EXTRUDERS

Mark A. Spalding, The Dow Chemical Company, Midland, MI

Gregory A. Campbell, Castle Research Associates, Jonesport, ME

Simulation of single-screw extruder screws using the
standard pseudo-Newtonian method is known to deviate
from measured performance. Part of this deviation is
caused by the calculation of the drag flow rate. Previous
research has shown that the calculation of the drag flow
rate using this method is higher than that in the actual
channel, causing the pressure gradient to be incorrectly
adjusted to compensate for the error in the drag flow term.
The research provided here provides the correction factors
for rotational flow (historically known as drag flow) such
that axial pressure gradients can be quickly and accurately
calculated.

Become a sponsor and get your logo link on this home page.  Last quarter this web site had over 90,000 hits.  Contact  Steve Schick,  sschick@polyvinyl.com

You can also find consulting services in YELLOW PAGES  in the menu bar. 

************************************************************************************

GUIDE TO MAKING EXCELLENT SLIDES  A slide show of simple rules for making PowerPoint slides that are truly effective. 

Here is a link to some tips on making great slide presentations.