Abstract: A table tennis racket includes a rubber (4) attached onto a blade (3) and easily removable without releasing any air-polluting gas. Opposing surfaces of the blade (3) and the rubber (4) have fine pores and lands of a micro-foam material, and the rubber (4) is removably held on the blade (3) with a vacuum suction force produced between the blade (3) and rubber (4) when pressed together.

Abstract: With a device including a melting furnace (11) for melting metals to form a molten metal (M), a tilted cooling body (31) allowing the molten metal (M) delivered from the melting furnace (11) to be poured thereon from above, and a tilted cooling body vibrating mechanism (36) for imparting vibration to the tilted cooling body (31), this invention can produce metal slurry possessing fine spherical crystals efficiently and continuously.

Abstract: A table tennis racket includes a rubber (4) attached onto a blade (3) and easily removable without releasing any air-polluting gas. Opposing surfaces of the blade (3) and the rubber (4) have fine pores and lands of a micro-foam material, and the rubber (4) is removably held on the blade (3) with a vacuum suction force produced between the blade (3) and rubber (4) when pressed together.

Abstract: A pouring apparatus for castings uses separate systems for supplying billets and delivering the semi-molten material, making it possible to readily modify the discharge flows and pressure. A pouring apparatus for castings that comprises solid material supply means for supplying solid material to a melting basin; heating means for heating the melting basin to semi-melt solid material supplied to the melting basin; a conveyance chamber provided adjacent to the melting basin; and delivery means for discharging, from a discharge nozzle, semi-molten material conveyed from the melting basin to the conveyance chamber.

Abstract: A method for grain refinement of magnesium alloy castings includes adding graphite (C) powder and manganese dioxide (MnO2) to a melt of magnesium alloy containing aluminum (Al) and manganese (Mn) to finely divide crystal grains of a cast structure.

Abstract: A method of grain refining cast magnesium alloy includes adding to a magnesium alloy melt containing aluminum and manganese, pure carbon powder, or a carbon source in combination with niobium pentoxide or vanadium pentoxide.

Abstract: A method of grain refining cast magnesium alloy includes adding to a magnesium alloy melt containing aluminum and manganese, pure carbon powder, or a carbon source in combination with niobium pentoxide or vanadium pentoxide.

Abstract: A pouring apparatus for castings uses separate systems for supplying billets and delivering the semi-molten material, making it possible to readily modify the discharge flows and pressure. A pouring apparatus for castings that comprises solid material supply means for supplying solid material to a melting basin; heating means for heating the melting basin to semi-melt solid material supplied to the melting basin; a conveyance chamber provided adjacent to the melting basin; and delivery means for discharging, from a discharge nozzle, semi-molten material conveyed from the melting basin to the conveyance chamber.

Abstract: An apparatus for the production of a platelike metal material includes a cooling unit for cooling a molten metal to form a metal slurry containing a solid phase, a pair of coarse rollers for cooling the metal slurry and, at the same time, rolling it to thereby give rise to a continuous, solidified, platelike metal material, and a cutting mechanism for cutting the continuous, solidified, platelike metal material into platelike metal materials of a stated length. Thus, platelike metal materials containing numerous uniform spherical crystals are obtained.