Introduction: Cardboard Conch Horn
Conch shells make a grand sound as a horn, but several species of the the actual animal are endangered, harmed by being harvested for the souvenir industry.
This is my attempt to create a more sustainable version of the instrument.
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Materials and Tools
If you know my work, you know I like simple materials.
This is put together from corrugated card from an old box, duct tape, and a short piece of PVC pipe.
The only tools I used were a craft knife, my trusty Leatherman, and a hacksaw (to cut the pipe to length).
Step 2: The Parts
The whole thing is made from the flaps cut from a large cardboard box.
Two flaps duct-taped together made the main coil, and a third flap, cut in half, made the end-pieces.
The flaps were 17cm wide, and when taped together they were just under a metre long. For the sake of aesthetics, I made the end-pieces 17cm square as well.
The pipe, a scrap I found in a corner, was about 2½cm in diameter, and about 10cm long.
Step 3: Curl It Up
I needed the strip to spiral with ease.
To that end, I used the two flaps which had the corrugations at right-angles to the long dimension. I dragged the strip hard over the corner of the table to force it into a curl, like quilling, writ large.
Step 4: Fix the Curve
Starting in the middle, I arranged the curled strip into a visually-appealing spiral. There may be an optimum shape, but I don't know what it is.
I anchored the spiral in place with small pieces of duct tape. Not pretty, but it worked.
Step 5: The Mouthpiece
The mouthpiece was made from a short piece of PVC pipe.
For comfort's sake, I used my knife to chamfer the edges of the pipe.
I cut a suitable hole in the middle of the second end-piece, and then anchored the mouthpiece in place with more duct tape, then fitted it in place and fixed with... duct tape.
Step 6: Finishing (sort Of), and Moving On.
All that remained was to find out if it worked...
Participated in the
Hurricane Lasers Contest