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Foam Extrusion Seminar (scroll down for complete outline and description)
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November 17-19, 2010 |
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About the Seminar
This seminar covers important materials, equipment, and process issues of foam extrusion in a comprehensive fashion.
The objectives of this seminar are:
- to teach the basic principles of foam extrusion
- to demonstrate the application of these principles to material selection, equipment selection, setting process conditions, and troubleshooting
- to provide information that processors can take back to the plant to improve production and product quality
What the attendees will learn:
- the basic principles of foamed polymers: mechanical properties, characteristic of foamable polymers, additives, foaming agents, and rheology of gas-laden melts
- foaming agents: endothermic versus exothermic, nucleation, compatibility, open cell foams, natural fiber foam composites, and foaming agent chemistry
- extrusion equipment for foam extrusion: single screw extruders, twin screw extruders, tandem extrusion systems, screw and die design for foam extrusion, high versus low density products
- troubleshooting foam extrusion problems: tools for troubleshooting, extrusion instabilities, irregular cell structure, corrugations and striations, poor melt strength, die freeze-off, and case studies
Who should attend:
- Design engineers
- Process engineers and manufacturing engineers
- Manufacturing managers
- Production supervisors/managers
- Technical service personnel
NEW FEATURE FOR FALL SEMINARS
Individual consulting sessions
During the November seminars attendees can sign up for individual consulting sessions with the instructor. These sessions are free and allow the attendee to ask questions and discuss details that cannot be handled in a larger group. The consulting sessions are 20 minutes long and will be handled on a first-come-first-served basis. You can sign up for a consulting session after you register for the seminar or during the seminar by contacting us at 530-269-1082.
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Course Description
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Course Description
Basic Principles
• Mechanical properties of foams
Std time behavior: stiffness, strength
Long time behavior: creep, fatigue
Short time behavior: impact
• Foamable polymers
Morphological characteristics
Characteristics of important resins
• Additives
• Cell stabilizers
• Other agents
• Nucleating agents
• Foaming agents
• Chemical : exo- and endo-thermics
Physical: atmospheric, hydrocarbons, HCFCs
Solubility and diffusivity
• Rheology of gas-laden melts
Bubble mechanics
Why does a foam stop growing?
And why does it shrink?
Open-celled foams
Foaming Agents
• Natural Fiber Foam Composites
Polymer Structures
Process of Manufacturing
Pressurization
Cooling and Mixing
Role of Cellular Structures
Fine Cellular Structure
Chemistry of the Foaming Agent
Die Configuration and Extrusion
• Foaming Agent Process and Perfor-
mance
Introduction
Foaming Agent Technologies
Endothermic & Exothermic
Foaming Agents
Gases & Nucleation
Elastomeric Foam Design
What 's happening in the Barrel?
Blowing Agent Compatibility
Blowing Agent Process
Properties of Foam Articles
Process Improvement using CO2
Open Cell Foam
Foaming agent studies
Foaming agents in IM & Extrusion
New Equipment Technologies
Location:
Sheraton Sand Key
Clearwater Beach, FL
Rate $172 till Oct 15, 2010 when our room block is released. After this date customers are considered for a room on an availablity basis at the prevailing rack rate.
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Hardware
• Twin vs. single screw extruders
• Single- vs. two-stage process
• Screw design for foam extrusion
• Melt temperature distribution
• Die design for foam extrusion
• High vs. low density foam products
• Free foaming method
• Constrained foaming method
• Microcellular foam extrusion
• Coextrusion
Thermoformability of Low-Density Thin-Gauge Sheet
• Material-Specific Die Design for Thin- Gauge Sheet
• Temperature-Dependent Internal Cell Gas Pressure During Cooling
• The Role of Sheet Aging Prior to Ther- moforming
• Factors Influencing Secondary Foam Expansion During Reheating
• Internal Cell Gas Pressure
• Temperature-Dependent Tensile Modulus
• Processing Factors Influencing Cata-
strophic Cell Collapse
Troubleshooting
• Requirements
• Tools for troubleshooting
• Systematic troubleshooting
• Extrusion instabilities
Frequency of instability
Functional instabilities
Solving extrusion instabilities
• Computer aided troubleshooting
• Case studies
Wear problems
Mixing problems
Irregular cell structure
Dimensional variation
Thermoplastic Foam Extrusion by James L. Throne is available with seminar regsitration for $65.00 Check appropriate box on registration form.
Other Books authored by Chris Rauwendaal and available with any seminar registration for a discounted price :
Check appropriate box on registration form.
The following book is available from Marcel Dekker Publications and is not discounted
- Mixing in Polymer Processing
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