公开(公告)号：US4541475A

公开(公告)日：1985-09-17

申请号：US451197

申请日：1982-12-20

申请人： John Goddard ,  David Mills ,  Alan J. Moulden

发明人： John Goddard ,  David Mills ,  Alan J. Moulden

IPC分类号： B22D23/10 ,  B22D27/15 ,  C30B11/00 ,  B22D18/00

CPC分类号： B22D27/15 ,  B22D23/10 ,  C30B11/00 ,  C30B29/52

摘要： Apparatus for casting in a vacuum has a single evacuable furnace chamber 10 in which the charge melting and mould heating takes place. The charge is melted in a crucible 24 by an induction coil 20, while the mould is heated by resistance heaters 18 which are made from a FECRALLOY (Registered Trade Mark) material and can be operated in air or vacuum. In operation an empty mould 16 and a charged crucible 24 are positioned in the furnace 14 and the furnace chamber is sealed. The heaters 20 and 18 are operated while the furnace is pumped down. A control device 40 ensures that the charge is not melted until the appropriate vacuum level has been reached. After pouring the filled mould is withdrawn into a withdrawal zone 25 and as soon as the casting has solidified to the extent that air can be admitted to the chamber without detriment, the vacuum is released and the mould and charge replaced. The furnace described is relatively inexpensive, having no water cooled valves between chambers, and the process is relatively quick and inexpensive due to the heating of the mould during evacuation of the chamber.

摘要翻译： 用于在真空中铸造的装置具有单个可抽出的炉室10，其中发生电荷熔融和模具加热。 通过感应线圈20将电荷熔化在坩埚24中，同时通过由FECRALLOY（注册商标）材料制成的电阻加热器18加热模具并且可以在空气或真空中操作。 在操作中，将空模16和带电的坩埚24定位在炉14中，并且将炉室密封。 加热器20和18在炉子被抽出的同时操作。 控制装置40确保在达到适当的真空度之前电荷不被熔化。 在将填充的模具倒出之后，将其注入到退避区域25中，一旦铸件凝固到空气可以进入腔室而没有损害的程度，则释放真空并且更换模具和电荷。 所描述的炉子相对便宜，在室之间没有水冷阀，并且由于在抽空室内的模具的加热，该方法相对快速和便宜。