Kinetic spray coating apparatus
US6283386A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2000 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | May 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C4/129
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus is disclosed for kinetic spray coating of substrate surfaces by impingement of air or gas entrained powders of small particles in a range up to at least 106 microns accelerated to supersonic velocity in a spray nozzle. Preferably powders of metals, alloys, polymers and mixtures thereof or with semiconductors or ceramics are entrained in unheated air and passed through an injection tube into a larger flow of heated air for mixing and acceleration through a supersonic nozzle for coating of an article by impingement of the yieldable particles. A preferred apparatus includes a high pressure air supply carrying entrained particles exceeding 50 microns through an injection tube into heated air in a mixing chamber for mixing and acceleration in the nozzle. The mixing chamber is supplied with high pressure heated air through a main air passage having an area ratio relative to the injection tube of at least 80/1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.