plate_mold.scad

positive_width = 185;
positive_length = 370;
positive_thick = 3;
lip_height = 3;
lip_width = 3;

negative_oversize = 3;
double_negative_oversize = 3;

module positive()
{
    cube([positive_width, positive_length, positive_thick]);
    translate([0, 0, positive_thick])
    {
        translate([0, 0, 0])
            cube([lip_width, positive_length, lip_height]);
        translate([positive_width - lip_width, 0, 0])
            cube([lip_width, positive_length, lip_height]);
        translate([0, 0, 0])
            cube([positive_width, lip_width, lip_height]);
        translate([0, positive_length - lip_width, 0])
            cube([positive_width, lip_width, lip_height]);
    }
}

module negative()
{
    translate([-negative_oversize, -negative_oversize, 0])
    cube([positive_width + (negative_oversize * 2), (positive_length / 2) + negative_oversize, positive_thick + lip_height + negative_oversize]);
}

module double_negative()
{
    translate([-negative_oversize - double_negative_oversize, -negative_oversize - double_negative_oversize, -double_negative_oversize])
    cube([positive_width + (negative_oversize * 2) + (double_negative_oversize * 2), (positive_length / 2) + negative_oversize + double_negative_oversize, positive_thick + lip_height + negative_oversize + double_negative_oversize]);
}


difference()
{
    double_negative();
    difference()
    {
        negative();
        positive();
    }
}