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EXTRUDER TECH, INC.
Specializing in flow stability of single screw extruder systems The mission of Extruder Tech, Inc. is to provide extrusion analysis, modeling, and lore for single screw extruders. Extruder Tech, Inc. is not connected with nor endorse any line of products, materials, or equipment. All of the information provided is based solely on fundamental engineering principles. Much of the information here is based on original analysis of single screw extrusion and cannot be found elsewhere. This web site does not send out popups. All of the executable files for downloading were created by Extruder Tech, Inc. and contain no malicious material. Also, almost all of the pdf files originate at Extruder Tech, Inc. The rest of the pdf files are from trusted sources.
The Society of Plastic Engineers features a paper from their Annual Technical Conference (ANTEC) each month. Click to link to the recent Paper of the Month.
The tandem screw extruder uses two screws and two drives in a common barrel. The two drives are driven from opposite ends of the barrel. The first drive powers a solids conveying screw, and the second drive powers a smooth rotor. The first drive solely controls the rate, and the second drive solely controls the melt temperature. Excellent temperature uniformity and response are obtained, as well as many other advantages. Download slides from ANTEC presentation of "The Tandem Screw Extruder."
Kinematics of Solids Conveying is a method for understanding and modeling solids conveying that does not rely on the use of friction factors. Instead, the solids conveying angle is defined and used as a single constitutive parameter that combines the effects of barrel and screw friction.
Dr. Derezinski received the Bruce Maddock Award at the Society of Plastic Engineers Annual Technical Conference (ANTEC 2007) on May 8 in Cincinnatti, Ohio.
Every extruder must perform two basic functions. RHEOLOGY MEASUREMENTS Click on References and Software for information on getting quality rheological measurements for your polymers. This is most key to accurate extruder analysis and screw design.
"Kinematics Model of Solids Conveying of LDPE with a Grooved Barrel," The model is based on previous work using the solids conveying angle instead of friction factors as the constitutive factor for the calculations. This makes the method very powerful since friction factors are difficult to define for a grooved barrel system.
Slides with Notes for "Kinematics Model of Solids Conveying of LDPE with a Grooved Barrel."
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Given in conjunction with Dr. Eldridge Mount, III, Ph.D. Together we have over 60 years of industrial experience developing extrusion technology and making it work. Click here for a brochure with details.
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Post questions at large about extrusion. You can also read up on selected topics of recent discussion. There often are some very practical issues discussed.
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