Hitachi Metals, Ltd.

Hiroyuki Hagiwara

Kimio Kubo

Hiroyuki Fujii

Masaaki Tanahashi

Akira Mikami

Katuhiro Kurose

Taichi Ikejiri

Hiroshi Ohnuma

An apparatus and method for casting metal in an evacuated mold cavity. The apparatus has a preferential suction zone through which a mold can be preferentially and effectively evacuated and a suction head sealingly fitting the upper surface of the mold. To the apparatus, is further provided a pressing means for pressing, in cooperation with the suction head, the mold against the inner bottom surface of a mold support chamber. By evacuating the mold through the preferential suction zone while pressing the mold to the bottom of the mold support chamber, a mold cavity is easily filled with a molten metal in such a manner to avoid casting defects such as insufficient filling, blow hole, surface fold, under fill, etc.

Vacuum casting method and vacuum casting apparatus

In a take-up apparatus for an amorphous metal ribbon a first tubular guide provides a passage for the ribbon from a ribbon manufacturing apparatus. A storage chamber is connected to the first tubular guide and a take-up drum is connected to the storage chamber through a second telescopic tubular guide. A gas suction device is connected to the take-up drum through a third tubular guide. The take-up apparatus is arranged in tandem with the ribbon manufacturing apparatus which comprises a crucible equipped at its lower end with a nozzle and accommodating a molten metal therewithin and a rapidly rotating quench roll disposed below the nozzle. The ribbon is manufactured by rapidly quenching the molten metal ejected from the nozzle on the quench roll and removing the ribbon at a high speed in a direction tangent to the quench roll. The ribbon is then sucked into the first tubular guide together with an air flow provided by the gas suction device.

Take-up apparatus for amorphous metal ribbon

Growing community of inventors

Kumagaya, Japan

Hiroyuki Hagiwara