*** Please note, each row and course# listed below is a separate, complete course. ***

Rubber Extrusion Technology

Course# Date Time Location
052-1226 06/03/2024 - 06/03/2024 8:00 AM - 4:00 PM Microsoft Teams
052-1228 08/08/2024 - 08/08/2024 8:00 AM - 4:00 PM Microsoft Teams
052-1229 06/03/2025 - 06/03/2025 8:00 AM - 4:00 PM Microsoft Teams
052-1230 07/25/2025 - 07/25/2025 8:00 AM - 4:00 PM Microsoft Teams
052-1231 08/11/2025 - 08/11/2025 8:00 AM - 4:00 PM Microsoft Teams
Cost: $1,000.00 USD
Online Registration
CEU's: 0.8
Instructor: Mr. Richard Strong

Course Overview

This presentation was developed for rubber industry employees who currently use Extrusion processes and wish to expand their knowledge or those wishing to gain some insights into these processes and how they can be used.

This course will offer an overview of the variety of commercially viable Extrusion processes and their strengths and weaknesses. Following that it will take the students into a more in-depth study of the 3 most common forms of Extrusion, Liquid Curing Media (LCM), better known as the Salt Bath process, Hot Air Vulcanization (HAV) and Microwave/Hot Air Vulcanization. The emphasis will be on practical knowledge that can be utilized in production along with safety concerns that always need to be addressed.

We will begin by looking at the common elements to all 3 processes, namely the extruder and its auxiliary components, plus downstream equipment for cooling and pulling.

The course then will look at each of the 3 Extrusion processes individually giving useful ideas for process improvements that the students can apply in their own manufacturing.

The course will conclude with a brief look at rubber compound development for these Extrusion processes and will conclude with a Question and Answer session, although questions are encouraged throughout the presentation.

Online Course Requirements

We want you to have a great experience participating in our remote (online) courses, and for that, you’ll need the right equipment and internet connection.

Minimum needs are:

  • A broadband internet connection that has at least a 2 Mbps upload and download speed.
  • A computer (PC or Mac) that can support the latest web browser versions.
  • At least 4 GB of RAM and adequate hard drive space.
  • A microphone and a speaker.

For more information, visit our Online Course Requirements webpage.

Instructor Biography:

Mr. Strong graduated cum laude from the University of Massachusetts, Dartmouth in 1971. In 1971 he received the Fred E. Busby Award for Excellence in Chemistry. He has 45 years in the rubber industry in the areas of Rubber Materials & Process Technology and Quality Systems Management. He began his work with Continuous Vulcanization in 1973 at the Johnson Rubber Company and continues to today making flooring products for the Johnsonite Rubber Flooring Division of Tarkett North America.

His experience includes a broad range of rubber compound development ranging from ebonite to fluoroelastomers and silicone as well as closed cell sponge. These compounds were used not only in continuous vulcanization processes but also autoclave extrusion, injection, transfer, compression molding and calendaring manufacturing processes. These compounds were utilized to manufacture rubber products for the auto, heavy truck, mass transportation, architectural, RV and general industrial markets.

His responsibilities included not only compound development, but the development of the mixing and other manufacturing processes required to produce a finished rubber product. This included documenting process parameters and establishing product quality requirements. Mr. Strong is a trained ISO 9001 Auditor and has served as Management Representative for his employers. He has traveled to China on 3 occasions in order to find, audit and approve suppliers of the rubber chemicals used in rubber compounds.

Mr. Strong is a member of the ACS Rubber Division and is currently serving on the Subdivision Advisory Committee. He is a past Chairman and life member of the Ohio Rubber Group. He is President and CEO of Elastomeric Consulting Services LLC He is currently employed as Senior Chemist at the Johnsonite Rubber Flooring Division of Tarkett North America.

A “Rules of the Road”

B  Terminology & Definitions

C Different Types of Extrusion Processes

1 Multi step Hot Feed

2 Multi step Cold Feed

3 Continuous Cold Feed

Vulcanization units used

LCM – Liquid Curing Media (Salt Bath Curing)
Hot Air (HAV)– High Velocity Hot Air
Microwave/Hot Air – Microwave ovens + High Velocity Hot Air
Ballotini  (fluidized bed) – High Velocity Hot air through glass beads
Electron Beam – High Voltage beam + high velocity hot air
Quartz & Hot Air – High Temperature Quartz heater (550C) with high velocity hot air (350C)
Steam Tunnel – High Pressure Steam tunnel

4 Combination Extrusion & Molding Processes

Rotocure – Preformer + rotating drum heated by oil or steam (175C)
Double Belt Press – Preformer + rotating heated and cooled belts  (175 – 200C)
Making Molding Blanks – Extruder + storage unit (pans, racks etc.)
Extruder + Calendar + storage units (pans, racks, etc.)

D Pluses & Minuses – by Type

1 Multi Step Hot Feed

a  Positives
b  Negatives

2 Multi Step Cold Feed

a  Positives
b  Negatives

3 Continuous Cold Feed

LCM – Immersion of product in liquid salt

a  Positives
b  Negatives

HAV – High Velocity Hot Air

a  Positives
b Negatives

Microwave - Hot Air

a   Positives
b   Negatives


a  Positives
b  Negatives

Electron Beam

a  Positives
b Negatives

Quartz & Hot Air

a  Positives
b  Negatives

Steam Tunnel

a  Positives
b  Negatives

4 Combination Extrusion & Molding Processes


a  Positives
b  Negatives

Double Belt Press – Sheet Rubber vulcanized between rotating heated and cooled belts.

a Positives
b Negatives

Making Molding Blanks

a Positives
b Negatives

E Focused look at LCM, Hot Air and Microwave – Hot Air  “The Big 3”

1  Common Elements

a  Extruder – Review of operation, screws, tooling, etc.
b  Cooling Bath
c  Puller
d Dies – Types and design considerations

F  LCM (Salt Bath)

1  Different configurations  (pictures and video)
2  Operational details

G  Hot Air (HAV)

1  Different configurations  (pictures and video)
2  Operational details

H  Microwave – Hot Air (HAV)

1  Different configurations  (pictures and video)
2  Operational details

I Compound Considerations & Examples for Extrusion Processes

J  Question & Answers


If you have any questions or need more information about this course, please contact:

Penelope Pinkston


Online Registration


Registration Form

Registration information: Registration shall remain open until posted as closed on the course listing on this site.

Registrations must be guaranteed by check, a purchase order number or a credit card, otherwise the registration will not be processed. Checks should be made payable to "The Akron Polymer Technology Services Training Center" and must include a copy of your completed registration form. Course fees are due before attending.

All registrations—whether by online, phone, fax or mail—will be confirmed and considered binding and subject to all cancellation policies. If you do not receive a confirmation prior to the class, please call The Akron Polymer Technology Services Training Center to verify your registration.

Course fee includes classroom instruction, instructional materials, parking permits, continental breakfast, lunch, beverages and refreshment breaks. Travel and hotel accommodations are not included.


Visit our registration webpage to view our cancellation/withdrawal policy.