The Shop > Composites & Plastics

shaping upholstery foam

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AlanT:
I needed two pads to get a better finish on a leather car-seat:
https://www.flickr.com/gp/90670218@N04/3Z1hY2

They are shaped like this:
https://www.flickr.com/gp/90670218@N04/y321u5

This stuff can be easily cut with a scalpel but getting a smooth round shape is hard with a blade.

Strangely you do it with a steel angle-grinder. Use a gentle touch and mind your fingers!
https://www.flickr.com/gp/90670218@N04/6C2gy3

I am NOT joking!

petertheterrible:
Probably the most useful tool in any toolbox.

There are commercial available blades that do that sort of work, they look like panel shrinking blades.

My personal favorite is the hot wire method, thanks for sharing.

Ever tried cutting a perfect circle in about anything with a baby grinder, works perfectly, no add-ons needed.

vtsteam:
One more possible method -- I remember someone saying a few decades ago that they used an electric carving knife to cut through sponge material, like mattresses.

Sid_Vicious:
I have used sandpaper on the grinder with good results.

Arbalist:

--- Quote from: vtsteam on March 13, 2015, 01:16:28 PM ---One more possible method -- I remember someone saying a few decades ago that they used an electric carving knife to cut through sponge material, like mattresses.

--- End quote ---

Yes I've used that method. Another is a smooth bladed band saw.

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