Although it took an extra round to get it right, I came up with a seat frame that I’m pretty happy with. I think it will look really good once it’s painted. So good in fact, it’s a shame you can’t see much of it when it’s mounted.
You’ve already seen this one with the paper frame:
Well, I first tried it in styrene with the same data that I was going to use for the metal one. I wasn’t sure that this was going to work for a couple of reasons. Both turned out to be true. First, styrene doesn’t bend well, it’s a great score and snap material. I thought I could get around this by using a little solvent or a little heat to soften up the bend first, but the solvent just caused it to split even more readily. Heat would have worked, but it wouldn’t have solved the second problem. Metal does something magical when you bend it. It both stretches and shrinks when you make a bend which is hard to explain, but essentially you have to make only minimal allowances for compression of your measurements when bending an inside shape. Styrene on the other hand does not do this, so when I bent the sides of the seat in on where the cushion is, it was too small for the cushion.
I made it work more or less, but I had some ideas on how to do it better.
To do this, I broke all of the parts out individually and made it all assemble together instead of fold up.
It’s a fairly simple assembly procedure
Once the base and bottom were in place I had to sand the sides of the back to match the angle of the base since I had cut everything straight. Really it only takes about four or five light strokes on some 600, just make sure the bonds are cured (15 minutes should be plenty of time)
With all the sanding done the easiest way to affix the sides was to just barely touch one edge to the solvent and slide it into alignment. This way it sticks really nicely instead of trying to hold the whole thing together while applying the solvent with a brush, and it still allows a few seconds of wiggle time to get it just right.
Here are a few of them fully assembled.
You can see here that the back sticks up just a little high compared to the sides. I’ll sand all the edges nice and flush before painting. I think I’ll probably go with the same green as the rest of the interior.