Need to understand & manipulate EPS foam extrusion & production

Hi

I was wondering where I should look and what specifically should I study if i am trying to understand foam extrusion as a chemical process. , why certain defects appear in foam products considering that they are as a result of some extrusion or chemical mistakes. in short, i want to know enough to be able to a control how EPS foam behaves/shapes (to obtain certain properties in desired coefficients/amounts if possible).

I would like to know as well how much studying (time) would this take, if anyone knows, and the level of difficulty of the task.

Thanks.
 

berkeman

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Hi

I was wondering where I should look and what specifically should I study if i am trying to understand foam extrusion as a chemical process. , why certain defects appear in foam products considering that they are as a result of some extrusion or chemical mistakes. in short, i want to know enough to be able to a control how EPS foam behaves/shapes (to obtain certain properties in desired coefficients/amounts if possible).

I would like to know as well how much studying (time) would this take, if anyone knows, and the level of difficulty of the task.

Thanks.
Welcome to the PF. :smile:

What have you found so far in your Google searches?
 

CWatters

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Perhaps someone has written a book on the subject?
 
Welcome to the PF. :smile:

What have you found so far in your Google searches?
Nothing relevant really at least Not at the level I wanted/expected. Maybe I am using the wrong terms, after all I am not a chemical/materials engineer. That's all I know and I came here seeking help from those who are knowledgeable in relevant fields of study.
 
Perhaps someone has written a book on the subject?
Maybe, but where do you think I should look? And which terms should I use to look for that ? Can you suggest any names ??
 

CWatters

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Any more suggestions ??
 

CWatters

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Polymer engineering, polymer reactions etc
 
Polymer engineering, polymer reactions etc
You are just using the term "polymer" in different combinations. Please Don't get me wrong I appreciate your help, but you are not adding anything with your latter suggestions/terms.
 
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You are just using the term "polymer" in different combinations. Plz Don't get me wrong I appreciate your help, but you are not adding anything with your latter suggestions/terms.
Do you know terms other than polymer that might be related ?
 

Nidum

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What more do you need to know ?

Do you want information about the practical engineering of the moulding equipment or theoretical modelling of the material flow in the moulding process ?
 
What more do you need to know ?

Do you want information about the practical engineering of the moulding equipment or theoretical modelling of the material flow in the moulding process ?
The latter would be helpful, I think. But I don't think this is enough on its own if you consider my purpose (refer to the question above if you haven't done so already).

Anyways, can you help me with the latter suggestion of yours "theoretical modelling of the material flow in the moulding process" either by suggesting names/links, giving specialized terms or informing me on the topic yourself ??
Thank!
 

Nidum

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In all the basic product making processes the chemical activity is largely finished before the shape forming process begins so I don't entirely understand the question ?

Anyway the shape forming processes all involve variants of the injection moulding principle - there's lot's of information on that available .

I think that the flow of an expanding / cooling / setting flow of foam in a duct could be modelled somehow but it's not going to be easy . Probably within the scope of CFD but a lot of work needed and a lot of validation by experiment .
 
In all the basic product making processes the chemical activity is largely finished before the shape forming process begins so I don't entirely understand the question ?

Anyway the shape forming processes all involve variants of the injection moulding principle - there's lot's of information on that available .

I think that the flow of an expanding / cooling / setting flow of foam in a duct could be modelled somehow but it's not going to be easy . Probably within the scope of CFD but a lot of work needed and a lot of validation by experiment .
How/where should I start sir ?

Also what is CFD ?
 
In all the basic product making processes the chemical activity is largely finished before the shape forming process begins so I don't entirely understand the question ?

Anyway the shape forming processes all involve variants of the injection moulding principle - there's lot's of information on that available .

I think that the flow of an expanding / cooling / setting flow of foam in a duct could be modelled somehow but it's not going to be easy . Probably within the scope of CFD but a lot of work needed and a lot of validation by experiment .
Also, from my experience, not all shape forming processes involve injection moulding. I have seen thermoforming(not sure I spelled it correctly) machines.
 

Nidum

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Thermoforming is usually a secondary production process . Pre moulded sheets of EP are heated and pressed in dies to form generally simple shapes .
 
Thermoforming is usually a secondary production process . Pre moulded sheets of EP are heated and pressed in dies to form generally simple shapes .
I have seen extruders that take in small-sized marble-like chemicals and transform them into straight long sheets of foam. Not sure if this is what you are talking about though.

If that's not what you were talking about then I probably didn't get what you wrote

Thanks!
 

Nidum

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first-phase-color-by-id.png


Not one of mine - this comes from the SymScale Library - but it shows modelling of plastic beads being fed into a plastisicer .
 

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