Method for producing metallic and ceramic hollow bodies
AssigneesUdo Gaumann, Ralf Schacher
InventorUDO GAUMANN
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Abstract
The invention relates to a method for producing a hollow body comprising at least one metallic or ceramic component, wherein a binder is mixed with a ceramic and/or metallic powder and the viscosity is set to a value in excess of 1000 Pa-s and the mixture then formed into a tube by means of one or more dies, wherein the so formed tube is then formed into a green compact by means of a blow molding process and subsequnetly converted into a brown compact by removal of the binder, wherein said brown compact is in turn converted into a finished hollow body through a thermal treatment step.
Claims10
A method for manufacturing a first hollow body which has at least one metallic and/or ceramic component, having the following steps:
- a) a binder material is mixed with a ceramic and/or metallic powder;
- b) the viscosity of the mixture is set to a value of at least 1000 Pa s;
- c) the mixture which is produced is shaped into a tube by means of one or a plurality of nozzles;
- d) the tube is shaped to form a second hollow body (green product) by means of a blow molding process;
- e) the green product is converted into a third hollow body (brown product) with removal of the binder material (binder removal);
- f) the brown product is converted into the first hollow body by a temperature treatment step (sintering), and g) step c) being carried out in such a way that the tube which is produced has a macroscopically varying composition.
Dependencies are inferred from the claim text.