Process and device for casting components
OwnerFriedhelm Kahn, Joachim Kahninventors
Life of this patent
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Abstract
The invention relates to a process and devices for casting components in metal alloys on the tilt casting principle in which a quantity of melt metered for casting is spread over a large gate cross section without turbulence from a melt container of the mould (30) into the mould (31) by rotating the casting device. To prevent the formation of oxide and weak structural points, the melt is taken from a metering furnace under a protective gas in a melt container connected to the mould and taken thence into the mould also under a protective gas. The melt hardens there under increased gas pressure on the feeder region of the casting, whereby its properties such as fine-grained, dense structure, high stability under load and accurately dimensioned surfaces are considerably improved.
Claims20
A process for casting components from metal alloy, by rotating an apparatus comprising a mould (31) and casting container (30);
- said mould having a mould cavity (1) and said casting container having an interior for containing a melt, said mould and casting container held in fixed relationship to one another, wherein said container is located below said mould prior to rotating;
- said apparatus further comprising at least one ingate (13) which extends substantially from one end of the mould to an opposite end of said mould in a horizontal direction along an axis of rotation, said ingate providing an open connection between said mould cavity (1) of said mould (31) and the interior of the casting container;
- said apparatus also comprising at least one communication channel (14), which provides an additional open connection between the mould cavity (1) and the casting container (30);
- the casting process comprising:
- rotating the apparatus so that the casting container (30) is located below the mould (31);
- filling the casting container (30) with sufficient melt for a single casting, with both the at least one ingate and the at least one communication channel being free of melt prior to rotating;
- sealing said casting container so as to be gas-proof;
- rotating the apparatus around a horizontal axis (12) in such a way that the melt is conveyed into the mould (31), with the flow of melt being effected through the at least one ingate and with a flow of gases being effected through the at least one communication channel (14) at a beginning of said rotating step;
- further rotating said apparatus until said casting container (30) is positioned above said mould (30) and said mould cavity (1), said at least one ingate and said at least one communication channel are filled with melt, wherein said at least one ingate and communication channel act as raisers;
- pressurizing the interior of the casting container at least temporarily during the mould filling and solidification process.
A process for casting components from metal alloy, by rotating an apparatus comprising a mould (31) and casting container (30);
- said mould having a mould cavity (1) and said casting container having an interior for containing a melt, said mould and casting container held in fixed relationship to one another, wherein said container is located below said mould prior to rotating;
- said apparatus further comprising at least one ingate (13) which extends substantially from one end of the mould to an opposite end of said mould in a horizontal direction along an axis of rotation, said ingate providing an open connection between said mould cavity (1) of said mould (31) and the interior of the casting container;
- said apparatus also comprising at least one communication channel (14), which provides an additional open connection between the mould cavity (1) and the casting container (30);
- the casting process comprising:
- rotating the apparatus so that the casting container (30) is located below the mould (31);
- filling the casting container (30) with sufficient melt for a single casting, with both the at least one ingate and the at least one communication channel being free of melt prior to rotating;
- sealing said casting container;
- rotating the apparatus around a horizontal axis (12) in such a way that the melt is conveyed into the mould (31), with the flow of melt being effected through the at least one ingate and with a flow of gases being effected through the at least one communication channel (14) at a beginning of said rotating step;
- further rotating said apparatus until said casting container (30) is positioned above said mould (30) and said mould cavity (1), said at least one ingate and said at least one communication channel are filled with melt, wherein said at least one ingate and communication channel act as raisers;
- and
- wherein a feeding volume of the melt remains in the ingate (13) and the communication channel (14).
An apparatus comprising a mould (31) and casting container (30);
- said mould having a mould cavity (1) and said casting container having an interior for containing a melt and having a volume for holding a quantity of melt for a single casting;
- a connecting means for holding said mould and casting container in a fixed relationship to one another, and said container is located below said mould prior to rotating;
- rotary driving means for rotating the casing container (30) together with the mould (31) around a horizontal axis (12);
- at least one ingate (13) which extends substantially from one end of the mould to an opposite end of said mould in a horizontal direction along an axis of rotation, said ingate providing an open connection between said mould cavity (1) of said mould (31) and the interior of the casting container;
- and
- at least one communication channel (14), which is distal from the at least one ingate (13) transverse with respect to the direction of the horizontal axis and provides an additional open connection between the mould cavity (1) and the casting container (30).
Dependencies are inferred from the claim text.