| 摘要 |
<p>The present invention relates to a casting apparatus comprising a holding furnace (1) for holding a reservoir of molten material (2), at least one smaller pumping furnace (3) also for holding a reservoir of molten material (4) and a casting cavity (6) connected to the pumping furnace (3) by one or more feed pipes (8). The pumping furnace is provided with means (7) for applying a pressure to force the molten material from the pumping furnace (3) into the casting cavity (6). The pumping furnace (3) and holding furnace (1) are contiguous and are connected by a non-return valve means (10) which prevents the flow of molten material from the pumping furnace (3) to the holding furnace (1) during pressurisation but which allows the flow of molten material from the holding furnace (1) to the pumping furnace (3) after pressurisation.</p> |
