Method for producing ceramic brake disks, with an insert in the green body before the pyrolysis
US7163653B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2001 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Feb 5, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/616
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a method for producing ceramic brake disks from a green body consisting of a sheet molding compound (SMC) having reinforcing fibers, and the ensuing pyrolysis and melt infiltration. The aim of the invention is to create a single-element green body comprising very complex inner cavities after pyrolysis. In order to achieve this, the method comprises the following steps: the green body (1) is produced from a sandwich consisting of SMC (2), a thermoplastic insert (4), and SMC (2) in one working step in a tool (5a, 5b), subjected to pressure and temperature; and the insert (4) fills the green body (1) over its entire surface and comprises openings (6) which are arranged in such a way that the upper and lower SMC layers (2) are interconnected, at least in parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.