EP 0451048 A1 19911009 - Process and apparatus for drying and degassing powders.
Title (en)
Process and apparatus for drying and degassing powders.
Title (de)
Verfahren und Vorrichtung zur Trocknung und Entgasung von Pulver.
Title (fr)
Procédé et installation de séchage et de dégazage de poudres.
Publication
Application
Priority
FR 9004254 A 19900403
Abstract (en)
The process and apparatus according to the invention dry and degas powders by using a dynamic process under vacuum and at a high temperature in a special device called a "sand box" (10). This sand box (10) is subjected to slow alternating rotatory movements so as to cause the powder being treated to pass progressively from one compartment to another, both compartments being inside the sand box (10). The rotations thus enable the powder to be agitated for a variable but predetermined time. The sand box (10) is introduced into a leakproof vessel (20) situated upstream of a possible valve that might enable the treated powder to be routed towards a storage compartment, or to be sent for immediate use, without releasing the vacuum. The degassing operation is carried out under vacuum and at a high temperature. Application to the manufacture of components sintered by hot isostatic pressing. <IMAGE>
IPC 1-7
IPC 8 full level
B01F 9/00 (2006.01); F26B 11/02 (2006.01); F26B 11/04 (2006.01)
CPC (source: EP US)
B01F 29/401 (2022.01 - EP); B01F 29/4021 (2022.01 - EP US); B01F 29/40222 (2022.01 - EP US); F26B 11/026 (2013.01 - EP); F26B 11/049 (2013.01 - EP US)
Citation (search report)
- [A] US 3599709 A 19710817 - FISCHER JOHN J
- [A] GB 191509971 A 19160504 - DJANDIERY ELIAS [RU], et al
- [A] FR 2451718 A1 19801017 - RICHTER GEDEON VEGYESZET [HU]
- [A] FR 1002719 A 19520310
- [A] US 3280470 A 19661025 - KUNTZ ROBERT L
Designated contracting state (EPC)
AT CH DE GB IT LI SE
DOCDB simple family (publication)
EP 0451048 A1 19911009; EP 0451048 B1 19940629; AT E108015 T1 19940715; DE 69102666 D1 19940804; DE 69102666 T2 19950112; FR 2660423 A1 19911004; FR 2660423 B1 19920612
DOCDB simple family (application)
EP 91400894 A 19910402; AT 91400894 T 19910402; DE 69102666 T 19910402; FR 9004254 A 19900403