TOP BOARD OF EXPERIMENTAL STAND COMPRISING WASTE FOUNDRY

摘要

The present invention relates to a top board of an experimental stand comprising: a reinforcing layer including 90 to 150 parts by weight of waste molding sand with respect to 100 parts by weight of unsaturated polyester resin; and a surface layer formed on the reinforcing layer and including epoxy acrylate. The waste molding sand contains 30% or more of the silicon content. The average diameter of the waste molding sand is 1 to 100 m. The waste molding sand is dried at 90 to 150 deg. C for five hours, and is ground powder. Accordingly, by recycling waste molding sand, processing costs of waste molding sand is reduced and environment pollution caused by destruction of waste molding sand or the like can be prevented.