METHOD AND APPARATUS FOR MANUFACTURING PLATE FOR CONSTRUCTION

摘要

PURPOSE: To obtain a roof plate of a high bonding strength by a simple method irrespective of a shape. CONSTITUTION: By circulating alternately repetitively steam between a steam feeding room 3 and a steam absorbing room 4 in a molding room 10, resin material 13 inserted in the molding room 10 is effectively heated to become foamed resin material, and simultaneously firmly fusion welded to a top plate 11 and a bottom plate 12.