Impact shelling of hard-cooked eggs
1993
Galili, N. | Goodrum, J.W.
A Prototype of an impact shelling device for hard-cooked eggs was developed and tested. The purpose of the impact device was to break the egg shell and rupture the membrane, with minimum damage to the interior parts of the egg. Major impact parameters, such as size and shape of the impact caps, optimal input energy, and the allowable deflections were determined The specific energy which was absorbed by the egg itself correlated well with shell and membrane rupture. Input energy of 40 to 80 J/kg of egg mass was needed for good peelability. This amount of specific energy caused excessive damage to some eggs. The excessive damage was eliminated by limiting egg deflection to about 10% of egg height. Final peeling of the eggs was done in a water bath by a specially designed shaking-conveying apparatus.
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