PROBLEM TO BE SOLVED: To produce an eggshell that is a resin eggshell having an egg shape is not only divided into two portions but also broken randomly as if a birds eggshell is broken by tapping the eggshell on an object, and formed of resin.SOLUTION: A resin eggshell has an egg shape. To break the resin eggshell randomly as if a birds egg shell is broken, arcs are drawn on a concave side or a convex side on the resin eggshell by using a cutting tool such as a router and the resin eggshell is engraved with grooves to guide a direction for breaking. Thus, a shell egg broken randomly and imitating a birds egg can be produced.COPYRIGHT: (C)2014,JPO&INPIT【課題】玉子の形をした樹脂製の玉子の殻で、二分割だけでなくコツン、コツンと物に当てる事により、鳥の卵の殻が割れる様に、ランダムに割れる樹脂で作られる、玉子の殻を作る事が大きな課題であった。【解決手段】卵の形をした樹脂製の玉子の殻で、鳥の卵の殻が割れる様に、ランダムに割れるには、樹脂製の玉子の殻を、凹面側、又は凸面側よりルーター等の切削具で、ランダムに円弧を描き、溝を彫り割れる方向を誘導する事で、ランダムに割れる鳥の卵に似せた殻玉子が出来上がる。【選択図】 図2
