Abstract: A burring apparatus for a friction welding machine comprises a clamp unit provided at the front end of a horizontal main spindle, for holding work piece W1 coaxial with the main spindle, a clamp unit provided at the front end of a slide movable to and away from the main spindle in the direction of the axis of the main spindle and a doughnut-shaped cutter for shearing off a burr. Work piece W2 is moved forward together with the slide until work piece W2 comes into contact with work piece W1 so that the mated ends of work pieces W1 and W2 are friction welded together to form a joint work piece W. The burr formed on the jointed work piece W is sheared off by the cutter. The jointed work piece W is then liberated from the main spindle.

Abstract: A burring apparatus for a friction welding machine comprises a clamp unit provided at the front end of a horizontal main spindle, for holding work piece W1 coaxial with the main spindle, a clamp unit provided at the front end of a slide movable to and away from the main spindle in the direction of the axis of the main spindle and a doughnut-shaped cutter for shearing off a burr. Work piece W2 is moved forward together with the slide until work piece W2 comes into contact with work piece W1 so that the mated ends of work pieces W1 and W2 are friction welded together to form a joint work piece W. The burr formed on the jointed work piece W is sheared off by the cutter. The jointed work piece W is then liberated from the main spindle.

Abstract: A process for preparing a treated magnesium and/or magnesium alloy component comprising (A) treating the magnesium and/or magnesium alloy component with a surface treating agent containing a phosphate, (B) treating the component with a pre-treating agent used before a corrosion inhibition treatment, (C) treating the component, as required, with a cleaning agent containing surfactant and at least one compound selected from among aromatic carboxylic acids and salts thereof, and thereafter (D) treating the component further as required, with a corrosion inhibitor for magnesium.

Abstract: A process for preparing a treated magnesium and/or magnesium alloy component comprising (A) treating the magnesium and/or magnesium alloy component with a surface treating agent containing a phosphate,

Abstract: A resin compound for a molding die, a molding die made of the resin compound, and a molding method using the molding die are disclosed. The resin compound includes thermoplastic resin, inorganic fiber reinforcing material and inorganic particle filler, has a flexural strength of 1000 kgf/cm.sub.2 or more and a modulus of elasticity in bending of 70000 kgf/cm.sup.2 or more, and allows machining. A deflection temperature under flexural load of the compound may be 180.degree. C. or more. From this compound, it is possible to provide a core, a cavity block or the like of molding dies which can be accurately finished by machining finishing with a low cost and within a short term, have durability and allows recycling. The molding dies can be applied to various molding methods, and provide accurate molded products with a low cost.

Abstract: A method of preparing a fibrous alkali metal titanate which comprises drying a slurry of a titanium-containing compound and an oxygen-containing alkali metal compound, baking the dried mixture and pulverizing the resulting agglomerate.

Abstract: A process for preparing a fibrous alkali metal titanate which comprises baking a mixture of rutile and an oxygen-containing alkali metal compound, rutile being finely pulverized to a particle size such that an average particle passes through a 200-mesh sieve, and pulverizing the resulting agglomerate.