How To Make A Funnel Shape Out Of Sheet Metal

Once you have a rectangle of paper follow these steps.

How to make a funnel shape out of sheet metal.

The cone has a diameter at the top smaller than the diameter at the bottom and to accurately trace the shape onto sheet metal you need to make a template out of construction paper. For a medium funnel use half a sheet of printer paper. Form into an elongated cone so that the opening at the thin end is about inch in diameter. Making the funnel neck step 1 draw a wedge shape on the sheet metal making it 4 inches wide at the top and 2 inches wide at the bottom and 6 inches in length.

Here is one way to make a cone from flat stock. Cut a 3 foot square piece of 24 or 26 gauge galvanized sheet metal. Cut out the cone template from your sheet metal using tin snips and file the edges smooth of any burrs of rough sections with your file. I used aluminum sheet coil but you could use paper or any flat material.

You can find cone calculators online. Your circle will be 18 from the center of the circle to the edge i e 36 in diameter when flat when formed into a cone the finished diameter will be. Roll the cone template into a cone shape starting at the wide end working toward the pivot point end. You can get three guards out of a 3x8 foot piece of metal see drawing below from zeleny s book then cut out circles.