1.Bake the board with a blast oven. When the temperature is between 140 and 160, it can be formed.
2.Looking for a small angle iron which will be the same length of bent acrylic panels. The angle is fixed on the acrylic plate with a clip, putted together to open water, or blowing along the right angle side of the angle with a hair dryer, then put it on the plane to hold it tight.