Society of Robots - Robot Forum
Mechanics and Construction => Mechanics and Construction => Topic started by: paulstreats on November 03, 2007, 09:32:42 AM
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check this link
http://www.instructables.com/id/How-to-%22make%22-plastic/ (http://www.instructables.com/id/How-to-%22make%22-plastic/)
it basically shows how to melt syrofoam with paint thinners, you can then mould the plastic like playdough and then leave to harden.
it might be useful to someone...
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Thanks paul! This is going to come in handy =)
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ive got some in an old coffee jar right now, im just going to mould into a basic shape and leave it to set.
i'll report back on the results
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Im curious about its flexibility and hardness after its done.
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That sounds handy.
You can also mold small thermoplastic parts with a homemade injection molder. I made one using the clylinder and piston from a car shock absorber, an electric drill and threaded rod to inject it, and a hot-air paint stripper to melt the contents. The same device can also be used for doing extrusions, but that's even easier because you don't need to clamp a mold closed.
You can also use silicone rubber molds to duplicate other parts, but I didn't develop this idea very far and only got some distorted parts out of it.
For some shapes it's also possible to just leave some plastic sitting in a mold in the oven for a little while.
check this link
http://www.instructables.com/id/How-to-%22make%22-plastic/ (http://www.instructables.com/id/How-to-%22make%22-plastic/)
it basically shows how to melt syrofoam with paint thinners, you can then mould the plastic like playdough and then leave to harden.
it might be useful to someone...
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my plastic still hasnt set properly yet >:(
The paint thinners i used said "acetone based paint thinner" on them, i presume that there wasnt enough acetone content to do the job efficiently, im going to have to try again with pure acetone if i can get it. Most products in the uk generally dont say whats in them, or even what quantities. Try going into a hardware shop and asking for a stone cleaning product with hydrochloric acid in it. What you get is confused looks and then the suspicious question"why? what do you want it for?"
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If memory serves correctly, isn't nail polish remover pure acetone?
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Thanks for sharing. I have been looking for this kind of information lately.
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there is also this product:
http://www.technobots.co.uk/acatalog/Online_Catalogue_Polymorph_Granules_104.html (http://www.technobots.co.uk/acatalog/Online_Catalogue_Polymorph_Granules_104.html)