I need to cut 2×2 ft square pieces from a sheet of memory foam. Not sure what tool is best for this. Any ideas? In the future I'd like to cut circles and eventually sculpt irregular shapes, I don't know what tool can be used for this sort of job.
What tool should I use to cut memory foam
tools
Related Solutions
You could probably rent a saw like this from your local hardware store.
They will usually have a diamond tipped masonry blade. You'll also want to make sure it's a wet saw or you keep the stones wet as you cut, as the dust from cutting concrete can make a real mess and be harmful to your health.
You may also be able to find a splitter like this.
The splitters produce far less dust and noise, and can usually be found cheaper than a saw (I found a couple on-line for a few hundred dollars). However, splitters may not produce a perfectly clean cut. Splitters also come in pneumatic and hydraulic varieties, purchasing those might be out of the budget ($1000.00 and up) but might be available for rent at a reasonable price.
Since concrete blocks are fairly thick, I'd drill several holes along the line you want to cut with a masonry bit, then use a use a mini jack hammer such as a small DeWalt with a 1/2" chisel bit. The hole will not be perfect shape etc, so you will need to fill around the vent after installed with some mortar. The pilot holes will help keep the hole in a rough shape and avoid breaking off large pieces of the block. Even it some block breaks, you can fix it up after with the mortar mix.
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Best Answer
For thicker pieces you might find you get better results by compressing the foam before cutting it. You could make a simple straight-line clamp out of a couple of 2x4s linked with a door hinge -- just put your foam in between, clamp the open end shut with a C-clamp, and use one edge of the wood as a guide for your cut. For your curved cuts it might make more sense to make a plywood die to match the final shape and press it down by hand or with something heavy before cutting around it.