Process to make a ceramic filter for metal casting
US11992874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2021 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | Apr 24, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y80/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method to manufacture a ceramic foam filter includes: sintering a filter body to a temperature greater than a molten metal to be filtered through the body; creating multiple tortuous path channels extending through the filter body individually having a repeated and controlled passage geometry creating a continuously changing diameter and area of a flow path through the multiple tortuous path channels causing localized increases and decreases in molten metal flow rate through the multiple tortuous path channels; and applying a mixture of at least one ceramic powder and at least one binder using additive manufacturing to shape the filter body including the multiple tortuous path channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.