Cryogen shot blast deflashing apparatus with inert gas purging system
US4646484A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | May 17, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24C3/263
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A closed recirculation cryogen shot blast deflashing apparatus includes an upstanding frame which movably supports a receptacle assembly including an enclosure having a housing enshrouding a rotatable drum, and a door thereon pivotable between positions wherein the door selectively opens and closes an open outer end of the drum. A throwing wheel is carried on the door for discharging particulate media and cryogen gas into the drum for impacting workpieces and embrittling workpiece flash. A recirculation system is provided for withdrawing cryogen gas and particulates from the drum during operation of the machine, for separating reusable particulate media from particles of waste material, and for returning a controlled flow of pressurized cryogen gas and particulate media to the throwing wheel, including a blower for recirculating cryogen gas to the throwing wheel from the drum by evacuating cryogen from the drum through a return conduit, and by redelivering pressurized cryogen to the throwing wheel through a supply conduit, whereby the blower cooperates with the throwing wheel to establish the desired high velocity flow of cryogen gas through the drum. A purging system introduces an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.