Abstract: A nitrogen trapping agent is added by a metering hopper to raw materials, which are melted and poured into a mold cavity of a metal mold device (18). The molten metal is then cooled and solidified into a casting (B). Before the molten metal is fully cooled and solidified, free nitrogen present in the molten metal is quickly trapped by the nitrogen trapping agent, producing a nitride. Then, a chilled structure generated in the surface layer of the casting (B) is decomposed by heating the casting (B). Finally, the heated casting (B) is machined into a camshaft (A) which is a cast iron member as a final product.

Abstract: A nitrogen trapping agent is added by a metering hopper to raw materials, which are melted and poured into a mold cavity of a metal mold device (18). The molten metal is then cooled and solidified into a casting (B). Before the molten metal is fully cooled and solidified, free nitrogen present in the molten metal is quickly trapped by the nitrogen trapping agent, producing a nitride. Then, a chilled structure generated in the surface layer of the casting (B) is decomposed by heating the casting (B). Finally, the heated casting (B) is machined into a camshaft (A) which is a cast iron member as a final product.

Abstract: A mortar substrate sheet, for placement between a substrate and mortar to be coated during installation of mortar to an outer wall of a building such as a house, comprising a water-resistant/moisture-permeable sheet 12 having water-resistant and moisture permeable properties, and a water absorption/retention sheet 13 having water absorbent and water retentive properties which is layered onto the front surface of this sheet 12, having a surface which is coated with water repellent agent having water repellent properties for only a designated period of time. Additionally, the reverse side of the water resistant/moisture-permeable sheet 12 has a resin layer 14 formed by coating or film-layering resins having elasticity. During installation, the mortar substrate sheet 11 is attached to the substrate with the resin layer 14 facing toward the substrate, lath is attached, then undercoat mortar 6 is coated.

Abstract: A panel is disclosed for use in double floors, a number of attachment holes are formed in the rear surface of the panel main body. The leg parts fit into these attachment holes in a state in which a step on the outer circumference of a leg part faces the panel main body. An elastic ring is placed between the step of a leg part and the panel main body. Projections, which are deformed when a leg part is inserted into an attachment hole of the panel main body and which fill the gap between the outer circumference of the leg part and the inner surface of the attachment hole, are formed on the outer circumference of the leg parts.