DEP0041286DA - Process for casting particularly thin-walled parts - Google Patents
Process for casting particularly thin-walled partsInfo
- Publication number
- DEP0041286DA DEP0041286DA DEP0041286DA DE P0041286D A DEP0041286D A DE P0041286DA DE P0041286D A DEP0041286D A DE P0041286DA
- Authority
- DE
- Germany
- Prior art keywords
- casting
- particularly thin
- walled parts
- casting particularly
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005266 casting Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title description 3
- 239000000463 material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Description
Es ist bekannt, dass das Giessen dünnwandiger Stücke Schwierigkeiten bereitet, weil das Giessgut zu früh abkühlt, dadurch nicht genügend dünnflüssig bleibt und dann die Form nicht vollständig ausfüllt. Es entstehen fehlerhafte Stellen im Gusstück, die dazu führen können, dass das ganze Stück unbrauchbar ist.It is known that the casting of thin-walled pieces causes difficulties because the cast material cools down too early and therefore does not remain sufficiently fluid and then does not completely fill the mold. Defects arise in the casting, which can lead to the whole piece being unusable.
Gemäss der Erfindung wird vorgeschlagen, die induktive Erwärmung beim Giessprozess in der Weise anzuwenden, dass dem Giessgut, das für besonders dünnwandige Teile bestimmt ist, zusätzlich Wärme zugeführt wird. Dabei kann die Wärme entweder dem Metall direkt oder über die z.B. aus nichtleitendem Werkstoff bestehende Giessform zugeleitet werden und zwar an der Stelle des dünnwandigen Gusses selbst oder unmittelbar davor. Auch dürfte es zweckmässig sein, das flüssige Metall vor dem Eintritt in die Form selbst zusätzlich auf induktivem Wege zu erwärmen. Diese Erwärmungsmethode erlaubt die Induktionsspule so auszubilden, dass die Wärmeübertragung auf diejenigen Teile des Gusses oder der Giessform beschränkt wird, bei denen die Wärmezufuhr notwendig ist, um Gussfehler zu vermeiden.According to the invention, it is proposed to use inductive heating during the casting process in such a way that the cast material, which is intended for particularly thin-walled parts, is additionally supplied with heat. The heat can either be transferred directly to the metal or via the casting mold made of non-conductive material, for example, at the point of the thin-walled cast itself or directly in front of it. It should also be expedient to additionally heat the liquid metal inductively before it enters the mold. This heating method allows the induction coil to be designed in such a way that the heat transfer is restricted to those parts of the casting or the casting mold where the supply of heat is necessary in order to avoid casting defects.
Die Erwärmung des flüssigen Metalles unmittelbar vor Eintritt in die Giessform kann auch aus einem ganz anderen Grund zweckmässig sein.The heating of the liquid metal immediately before it enters the casting mold can also be useful for a completely different reason.
Wenn es sich beispielsweise um ein leicht oxydierbares oder sublimierbares Metall handelt, kann es von Vorteil sein, dem flüssigen Metall die hohe Giesstemperatur erst im letzten Augenblick, nämlich kurz vor dem Eintritt in die Giessform, zu geben.For example, if the metal is easily oxidizable or sublimable, it can be advantageous to give the liquid metal the high casting temperature only at the last moment, namely shortly before it enters the casting mold.
Die Anwendung der Erfindung ist nicht auf bestimmte Giessverfahren, etwa das Graugussverfahren, beschränkt. Es ist überall anwendbar, wo man die geschilderten Nachteile vermeiden will. Es wäre sogar denkbar, das Verfahren beim Giessen nichtmetallischer Werkstoffe anzuwenden und die Wärme auf kapazitivem Wege durchzuführen. Auch wäre die Möglichkeit gegeben, durch metallische Zusätze das Giessgut elektrisch leitend zu machen.The application of the invention is not limited to certain casting processes, such as the gray cast process. It can be used anywhere where you want to avoid the disadvantages described. It would even be conceivable to use the method when casting non-metallic materials and to carry out the heat in a capacitive way. It would also be possible to make the cast material electrically conductive by using metallic additives.
Claims (1)
Family
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