Mitsubishi Jukogyo Kabushiki Kaisha

Mitsubishi Heavy Industries Limited

Kisaburo Tanaka

Keiichi Yamamoto

Youichi Wakiyama

Takahiro Matsumoto

Kunimasa Sasaki

Ritsuo Hashimoto

Takashi Yamane

Hideaki Takatani

A molten metal is poured in a molten metal storage portion (50) formed between a pair of cooling drums (1, 1') which rotate in opposite directions to each other and a thin metal plate (40) is discharged downward thereof. A casting operation is performed while shot particles (30) are being blasted by a shot particles blasting device (15) from at least two positions onto an entire widthwise outer circumferential surface (2) of each cooling drum (1, 1') so as to form dimples on the circumferential surface (2), thereby preventing the occurrence of cracks in the cast piece (40). Also, a brushing device (5) is disposed in abutting relation on the outer circumferential surface (2) of the cooling drum (1, 1') in order to clean the surface (2).

Twin drum type continuous casting method

A cooling drum can continuously cast a favorable band-shaped cast piece having little thermal deformation. The cooling drum comprises a three-layer structure including a rigid member, a cooling member metallurgically bonded to the outside of the rigid member, and a heat-resistance member plated by electro-deposition on the outer circumferential surface of the cooling member. The rigid member is made of austenite group stainless steel, the cooling member is made of Cu or Cu-alloy, and the heat-resistance member is made of either Ni or its alloy or Co or its alloy.

Method for manufacturing a cooling drum for a continuous casting system

A twin drum type continuous casting apparatus is provided for continuously feeding molten metal into a cast portion defined by a pair of water cooling drums that are rotated in opposite directions to each other, thereby continuously casting a plate-like cast piece. A thin portion is formed close to an outer circumferential portion of each of opposite end portions, in a width direction, of each of the water cooling drums. A thin annular member having a hot water flow passage therein is formed in between the thin portion and a shaft with a space relative to an end face of each of the water cooling drums.

Twin drum type continuous casting apparatus and method

A cooling drum which can continuously cast a favorable band-shaped cast piece having little thermal deformation and a method for manufacturing the same cooling drum, are disclosed. The cooling drum comprises a three-layer structure consisting of a rigid member, a cooling member metallurgically bonded to the outside of the rigid member, and a heat-resistance member plated by electro-deposition on the outer circumferential surface of the cooling member. The rigid member is made of austenite group stainless steel, the cooling member is made of Cu or Cu-alloy, and the heat-resistance member is made of either Ni or its alloy or Co or its alloy. Within the rigid member are equipped partition walls and tubular partition walls. To the opposite end portions of the rigid member are connected hollow shafts adapted to be rotationally driven, by means of bolts after shrinkage fitting. In the cooling member are drilled cooling holes for communicating a coolant as distributed over the entire circumference, extending in the axial direction of the drum. The cooling holes are communicated with a flow passageway of a coolant formed by the partition walls and the tubular partition walls through cooling passageways.

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Hiroshima, Japan

Kisaburo Tanaka