Has anyone used pouring rubber as used for making moulds. I would like to experiment with it for damping but do not know what I should be buying as there are a few to choose from. Two areas where I want to try it are in a plastic plinth and in a turntable platter.
I should have said liquid rubber as this stuff can also be brushed on to an object to make a mould. It would seem like the ideal stuff to use on items such as a Rega sub platter to fill the voids. As long as the platter is exactly level, the rubber should flow evenly over the surface and remain balanced.
I've made puppets this way- two part silicone is not cheap, but it's the best. Doesn't stick, flows well, cures fully.
If making a mould of a large disk, wouldn't you need to add some sort of support stucture to the mould to prevent the large surface area from drooping? Unless of course you make the mould large enough that is would support itself, but that seems like a waste of material.
Puppets?
Puppets?
Puppets?
Can't help it, my parents were artists, as is my wife. Thoroughly polluted me.😀
For damping purposes you can use Devcon two-part urethane filled with barium titanate powder. Flexane is a little cheaper than silicone casting compounds.
http://www.devcon.com/products/products.cfm?brand=Devcon&cat=Castable Urethanes
John
http://www.devcon.com/products/products.cfm?brand=Devcon&cat=Castable Urethanes
John
Last edited:
Depends. For filling for damping purposes, yes. For moldmaking, it might be tough to get good release.
urethane is quite good for this purpose I would think, for the object itself that is, for the mold I would still recommend good old RTV (silicone 2 part) for the platter I would not go too far with the shore rating, perhaps 70-80A which will retain some flex, though very hard to the touch, just means its not brittle as some of the higher ratings. I use shore 70-80A hardness for casting my own connector housings and even quite small they are very strong due to having this small amount of flex. only thing is, casting something this size will create quite a bit of heat, so take precautions and read up on the process before you start. you could even go harder, but I wont give any specific advise towards making a platter as I dont have any experience there
Last edited:
- Status
- Not open for further replies.