Casting mold for casting components and method for the production thereof

Patent metadata

Field	Value
Publication number	US-11612930-B2
Application number	US-201917250868-A
Country	US
Kind code	B2
Filing date	Sep 19, 2019
Priority date	Sep 19, 2018
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

Disclosed herein are systems and methods for production and use of a casting mold for casting components. The casting mold comprises at least one casting mold frame made of metal and/or of an alloy, and also one or more ceramic casting mold inserts introduced into the at least one casting mold frame. The casting mold insert(s) have the negative contour or part of the negative contour of a component to be produced or of the combination of a component to be produced with one or more casting cores.

First claim

The invention claimed is:

1. A casting mold for casting components, the casting mold comprising;
at least one casting mold frame made of a metal or of an alloy; and
multiple ceramic casting mold inserts which are configured to be introduced into the at least one casting mold frame and which comprise a negative contour or a part of the negative contour of a component to be produced, or of a combination of a component to be produced with at least one casting core;
wherein the multiple ceramic casting mold inserts are introduced into the at least one casting mold frame, wherein the multiple casting mold inserts comprise the negative contour or the part of the negative contour of the component to be produced or of the combination of a component to be produced with the at least one casting core, wherein the ceramic casting mold inserts each include a material, and wherein a first material of a particular one of the ceramic casting mold inserts has a material characteristic property that includes at least one of a heat conductivity different from a second material of at least a second particular one of the ceramic casting mold inserts, a coefficient of thermal expansion different from the second material of the second particular one of the ceramic casting mold inserts, or a heat conductivity and a coefficient of thermal expansion different from the second material of the second particular one of the ceramic casting mold inserts.

2. The casting mold according to claim 1 , wherein the multiple ceramic casting mold inserts include a material that is at least one of: AlN, SiAlON, SiN, SiSiC, SiC, zirconium oxide, aluminum oxide, aluminum titanate, or a mixture thereof.

3. The casting mold according to claim 1 , wherein the multiple ceramic casting mold inserts include a material that has a heat conductivity of from 1.5 to 50 W/mK, inclusive.

4. The casting mold according to claim 3 , wherein the material has a coefficient of thermal expansion of from 0.5 to 3.5·e −6 /K, inclusive.

5. The casting mold according to claim 3 , wherein the material is at least one of: SiN, SiAlON, aluminum titanate, or a mixture thereof.

6. The casting mold according to claim 1 , wherein the multiple ceramic casting mold inserts include a material that has a heat conductivity between 100 and 220 W/mK, inclusive.

7. The casting mold according to claim 6 , wherein the material has a coefficient of thermal expansion between 4.0 to 5.6·e −6 /K, inclusive, and wherein the material is at least one of: AlN, SiSiC, or a mixture thereof.

8. The casting mold according to claim 1 , wherein at least one of the ceramic casting mold inserts introduced into the casting mold frame includes a material that has at least one of:
a heat conductivity between 1.5 and 50 W/mK, inclusive, or a coefficient of thermal expansion between 0.5 and 3.5·e −6 /K, inclusive, and wherein the material is at least one of: SiN, SiAlON, aluminum titanate or a mixture thereof.

9. The casting mold according to claim 1 , wherein the multiple ceramic casting mold inserts include silicon-infiltrated silicon carbide (SiSiC).

10. The casting mold according to claim 9 , wherein the multiple ceramic casting mold inserts include at least one passivation layer, the at least one passivation layer including a material, and wherein the material is at least one of: carbon, silicon nitride, or a mixture thereof.

11. The casting mold according to claim 1 , wherein the metal or the alloy is at least one of: an iron-nickel alloy, an iron-nickel-cobalt alloy, tool steel, cast iron, and mixtures or alloys thereof.

12. The casting mold according to claim 1 , wherein at least one of the casting mold inserts introduced into the at least one casting mold frame includes a material that has at least one of: a heat conductivity between 100 and 220 W/mK, inclusive, or a coefficient of thermal expansion between 4.0 and 5.6·e −6 /K, inclusive, and wherein the material is at least one of: AlN, SiSiC, or a mixture thereof.

13. A casting mold for casting components, the casting mold comprising:
a casting mold frame made of at least one of a metal or an alloy; and
a set of ceramic casting mold inserts configured to be introduced into the casting mold frame, wherein each of the ceramic casting mold inserts comprises:
a negative contour, or a part of the negative contour, of a component or a combination of a component to be produced with a casting core;

wherein each of the ceramic casting mold inserts is introduced into the casting mold frame, wherein each of the ceramic casting mold inserts comprise the negative contour or the part of the negative contour of the component to be produced with the casting core, wherein a particular ceramic mold insert of the set of the ceramic casting mold inserts includes a first material, wherein a second particular ceramic mold insert of the set of ceramic casting mold inserts includes a second material different from the first material, and wherein the first material has a material characteristic property that includes at least one of a heat conductivity different from the second material, a coefficient of thermal expansion different from the second material, or a heat conductivity and a coefficient of thermal expansion different from the second material, and wherein either the first material or the second material has a heat conductivity of between 1.5 and 50 W/mK, inclusive, and wherein the material is at least one of: SiN, SiAlON, aluminum titanate, or a mixture thereof.

14. The casting mold of claim 13 , further comprising:
a second casting mold insert configured to be introduced into the casting mold frame, wherein the second casting mold insert includes a second material, and wherein the second material has at least one of: a different heat conductivity or a different coefficient of thermal expansion than the material of a first casting mold insert.

Assignees

• Fraunhofer Ges Forschung

Inventors

• Wöstmann Franz-Josef
• Stumm Lukas
• Soltmann Christian
• Busse Matthias

Classifications

• B22C9/061 Primary

  Materials which make up the mould · CPC title

• B22D17/2209 Primary

  Selection of die materials (for permanent moulds B22C9/061) · CPC title

• B22C9/101

  Permanent cores · CPC title

• B22C1/02

  characterised by additives for special purposes, e.g. indicators, breakdown additives · CPC title