D-Lab Corn Sheller
A simple Do IT Yourself (DIY) corn shelling tool which makes the corn shelling task easy and faster compared to the traditional methods.
The product can be made with locally available materials and is DIY so the cost varies depending on the region and materials used.
Goal 2: Zero hunger
Do it yourself (DIY) instructions are available online. The user needs to build a metal jig which requires welding operations. The metal jig can be used to produce as many corn shellers as desired. Once the jig is ready, a piece of metal sheet can be shaped into a corn sheller following 7 simple steps (Cutting the metal sheet, forming the ridge, forming the cone, riveting, spot welding, finishing the sheller). Tools needed to make the corn sheller include: metal jig, hammer, shears, pliers, wood block, pipe or rod.
Do it yourself (DIY) instructions are available online, workshops can be offered through local partners to teach the communities how to build and use the product
D-Lab’s corn sheller and jig have been taken to more than 10 countries.
Capacity of sheller, measured in kilograms per hour
Is the sheller manually operated or is it motorized?
Size of holes on the sieves, measured in millimeters
Rate of efficiency of the sheller
The material used in construction
List of crops that this technology shells
Overall percentage of nuts broken
D-Lab corn sheller is highly portable and requires no electricity. It can be built from any type of metal sheet locally available. The mold for the sheller, is cut to fit the local variety of the corn. The sheller is placed on the corn cob, and the corn bob is span while being held still with the hand. The ridges in the sheller pulls out the grains from the cob as the cob is being span in the sheller. It requires virtually no training to be used, and some tool handling skills to be built. It can be built varying the corn sheller diameter depending on the user’s needs.
It can be built with locally available materials, which can be used as replacement as well.
It can be recycled afterwards.
The sheller is said to work at least four times faster than by hand
Tests performed by the manufacturer MIT’s D-Lab.
Potential cuts while building and handling metal sheet. Depending on the materials used the tool can present rusting.
Trottier, Katherine. Low-Cost Maize Shellers for Nepal. (2014).
Field tests and user experience feedback
D-lab corn sheller can be used as part of creative capacity building workshops.
Ward, L. 2008. MIT’s Guru of Low-Tech Engineering Fixes the World on $2 a Day Popular Mechanics
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