Molten metal thermal insulation air-cushion device and thermal insulation using method thereof

• Main Authors: YE JINRUI, LI HAOMING, HAN YUMING, XU HAIDENG, QIU YUANZHONG
• Format: Patent
• Language: Chinese; English
• Published: 15.07.2009
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention relates to a molten metal heat-insulation air cushion device, an air cushion shell (4) thereof is provided with a concave structure and a plurality of shunting pouring gates (10), an electrothermal tube (3) and an air cushion flange (2) are respectively arranged on the outer wall of the lateral side and at the outer end of the air cushion shell, and a lower port (8) of each shunting powering gate is less than an upper port (6) of each shunting pouring gate when the air cushion shell is in working state. A method for using the air cushion device comprises the following steps: firstly, the air cushion device is arranged at the lower part of ingates of a lower die of a metal die in the low-pressure casting, and an opening part of the air cushion shell of the air cushion device faces downwards and is airtight; the shunting pouring gates of the air cushion device and the ingates of the lower die of the metal die are butted and assembled to form a whole body together with the lower die of the metal di