This seminar offers comprehensive coverage of the extrusion of polymeric
materials. It is intended for individuals who have little or no
background in the extrusion process or for those who have been using
single and twin screw extruders and want to gain a thorough
understanding of the interrelationships between the polymeric materials,
the equipment and processing variables. Lectures discuss the significant
characteristics of polymeric materials and their effect on the extrusion
process. Types of extruders and their components, equipment
specifications, instrumentation, and screw geometry are discussed.
Operational principles including solids conveying, plastication, mixing
and pressure generation of single and twin screw extruders are
explained. Specific extrusion processes including blown and flat film,
tube and pipe, profiles, extrusion coating and foam extrusion are
discussed, and expanded upon if requested by participants.
Troubleshooting techniques and operational strategies are covered.
Characteristics of Polymeric Materials
- Molecular weight; molecular weight distribution; properties of bulk
materials; polymer rheological properties; thermal properties
Types of Extruders
Operational Characteristics (Single & Twin)
Zonal distribution & function; solids conveying principles; melting
theories; conveying & pressure generation; screw characteristic
curves; screw design principles; conveying, melting, mixing, venting
& pressure generation; extruder output calculations; basic demands
- Blown & flat film; tube & pipe; profiles; extrusion coating; wire
coating; foam extrusion; fiber spinning; coextrusion
Most of the afternoons will be spent in the Plastics Process Engineering
Labs with hands-on experience in start-up, shutdown and troubleshooting
single and twin screw extrusion operations. Demonstrated extrusion
processes: blown film, flat film, tubes & pipes, foam extrusion and
compounding with twin screw extruders.