posted July 09, 2004 08:21 AM               

Lots of good questions.

While I don't work with rubber, I think the physical effects while coating are somewhat similar to thermoplastics. The differences tend to be that rubber has much higher viscosity and much stronger elastic properties.

Trial and error has been the long term method in thermoplastics. That method is somewhat aided by simple flow calculations and rules of thumb.

I work in the area of extruion simulation. We try to bring the scienific knowledge to the industry through simulation products. If the physical behaviors can be properly described mathematically, then the simulations can be quite accurate. This allows us to test ideas and methods without cutting metal.

The below shows a coating operation. The flow channel looks nice and streamlined. In reality this is a poor design because a circular, stagnent flow sets up in the angled area. The material burned in this area. By changing the design in the computer a configuration can be found that makes quality products.

I know this does not answer you question, but these type of computer based design tools can save you a lot of money in the long run.

Tom Cunningham
Extrusion Technical Services

[This message has been edited by Tom C (edited July 09, 2004).]

[This message has been edited by Tom C (edited July 09, 2004).]

posted July 09, 2004 10:18 AM               

You mentioned the computer design software, is this software available on the webb? What and who's would you suggest or support? Do you do this type of work on contract basis? What would be required of my company (other than p.o and design requirements)to get you involved? You have answered most of my questions and raised many more. Look forward to hearing from you.