Sorry, I can’t help with the drawplate, but can offer a suggestion
for a possible alternative.
If you don’t need to create rectangular wire where each face is
flat, then have you considered using a rolling mill? Whenever I need
strips I use my rolling mill. There are only two small problems:
predicting the final dimensions, and the edges of the strip are
slightly rounded instead of being flat, but in my case that’s not an
issue. I solved the problem of predicting the final dimensions by
doing a series of experiments and writing a small computer program.
Now, all I have to do is to specify the width and thickness of the
wire I need and the program tells me what size of round or square
wire I should start with.
For example, for a strip of 1x3mm I should start with round wire of
2.347mm diam, or square wire of 2.080mm.
If it would help, I can let you have a copy of the program.
Regards, Gary Wooding