Moulds for polyurethane foam (1 Viewer)

[Mardasson]

Hi All,

In the past few weeks I've sculpted about 2 meters of indian wall as background for my Delhi durbar display. It's fun when I have to create new forms but a bit repetitive otherwise.
As I've some more to complete I was wondering if there was another process to reproduce several of these walls without doing the sculpting from scratch.

From recent insulation work I know there are spray of polyurethane foam that expands when out of the spray and, when dry, looks the same than the foam boards I'm sculpting.

Do you know how I could make some moulds to use that foam ? How to avoid it to stick to the mould ?.....

Thanks !
Michel

 

[thebritfarmer]

Michel

A lot of railroad modellers use latex and brush it on to the form that then need to copy many times. They tehn fill with plaster and then when this is set the glue in place. Perhaps this will also work for you?

kind of like this idea

http://www.modeltrain.com/rubbermold/rubbermold.html

 

[thebritfarmer]

I was having a think about this and then remembered years ago my dad made my brother & I a castle for our Britains knights. Basically he cut the shapes out of plywood and then plastered all of the sides and edges. Once they were dry he used a ruler and knife to scribe the stones into the plaster. When it was all done and dry he painted it. It was really cool and we had it for years, wish I still had in now actually.

 

[4th Hussar]

I was having a think about this and then remembered years ago my dad made my brother & I a castle for our Britains knights. Basically he cut the shapes out of plywood and then plastered all of the sides and edges. Once they were dry he used a ruler and knife to scribe the stones into the plaster. When it was all done and dry he painted it. It was really cool and we had it for years, wish I still had in now actually.

How do you think drywall mud might work? It is fairly easy to work and as long as you keep thebucket closed up, it will keep for quite a while.

 

[thebritfarmer]

How do you think drywall mud might work? It is fairly easy to work and as long as you keep thebucket closed up, it will keep for quite a while.

Never thought of that, I don't see why it wouldn't work.

 

[Mardasson]

Michel

A lot of railroad modellers use latex and brush it on to the form that then need to copy many times. They tehn fill with plaster and then when this is set the glue in place. Perhaps this will also work for you?

kind of like this idea

http://www.modeltrain.com/rubbermold/rubbermold.html

Hi,
Thanks for the link.
That seems a good idea.
Do you know if polyurethane foam will glue to the rubber mould ? Or if I need to cover the mould with something to avoid that ?
I would also have to put something to reinforce the mould and avoid distortion due to foam expansion.
I will investigate and will let you know my result.
Thanks !
Michel