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Rubber Extrusion Technology

Learn applicable basic information on all aspects of the rubber extrusion process. Build a knowledge base that encompasses products ranging from intricate profile extrusions to tires, using compositions ranging from a single thermoplastic elastomer to multiple dense and cellular compounds coextruded with carriers and reinforcements.

This course can be applied to the Elastomer Technology Certificate.

Who Should Attend

Materials and process engineers, die designers, quality control personnel, supervisors and managers responsible for these rubber extrusion functions.

Benefits and Learning Outcomes

  • Understand compound ingredients, characterization and processing
  • Become familiar with equipment for pumping, shaping, curing and monitoring
  • Learn various methods related to process variation and control

Course Outline/Topics

Elastomer Properties

– Chemical Structure

– Molecular Weight/Distribution

– Morphology and Crystallinity

– Viscosity (Flow)

– Elasticity (Swell)

– Scorch

Laboratory Tests for Extrudability

– Mooney Viscometer

– Processability Testers

– Standard Dies (Garvey)

– State of Cure Tests

Compound Ingredients

– Elastomers

– Fillers

– Plasticizers and Process Aids

– Cure Systems/Nitrosamines

Processing and Compounding


– Polychloroprene (Neoprene)


– Nitrile Rubber

– Chlorosulfonated Polyethylene

– Silicone Rubber

– Fluoroelastomers



Screw Extruder

– Types (Hot/Cold Feed)

– Barrels and Screws

– Vented Extruders

– Continuous Mixers/Twin Screw Extruders

– Feed Devices

Ram (Preform) Extruders

Auxiliary Devices

– Shear Head

– Cavity Transfer Mixer

– Gear Pump

Drives and Transmission

Temperature Control




– Inline Heads

– Crossheads

– Tire Heads

– Breaker Plates

– Screen Changers


– Types and Design Criteria

– Flow

– Drawdown

– Sheet Dies, Profile Dies

– Design Computations

– Die Relief Strategies

– Finite Element Simulation



Continuous Cure (Low Pressure)

Batch Cure

Hose Manufacture



Instrumented Extrusion Line

Temperature Sensors

Pressure Sensors

Dimension Sensors

Weight and Area Sensors

Property Sensors



Extruder Dynamics

– Flow in Screw Pumps

– Operating Curves

– Extrudate Temperature

– Conveyor Operation

– Extrudate Contraction

– Extrudate Curvature

Productivity and Quality

– Optimum Conditions

– Feed Strip Geometry

– Feed Mill Operation

– Adjustments on Pin Barrels

– Screw and Barrel Wear

– Starved Operation

– Die Drool

Process Variation and Control

– Statistical Process Control

– Feedback Control

– Size Control

– Shape Control

– Online Measurement Guide

– Commercial Controls



Changing Extrudate Shape

Switching Feed Streams

Directed Flow Technology

– Rapid Die Change

– Dimensional Control

Multiextruder Control

Low Resistance Dies



Product Geometry

Extruder Operation


All sessions are Face-to-Face unless otherwise noted.

Wed.-Fri., Apr. 27-29, 2016


Location: UWM School of Continuing Education

John Dick
James Stevenson


$1,290 if you register by Sat., Feb. 27, 2016.
$1,390 if you register after Sat., Feb. 27, 2016.

PDHs: 20, CEUs: 2

Enrollment Limit: 40

Program Number: 4830-8659

Registration Deadline: Wed., Apr. 27, 2016

Register Now