| 摘要 |
A test apparatus has a chamber 12, and a powder manipulation device 20 with helical screw flight 26. A drive arrangement 22 selectively moves the powder manipulation device in axial and rotary movements relative to the test chamber. A shaft 24 may carry the flight, with the flight extending around its circumference. The powder manipulation device may be made of metal and advanced into or retracted along the axial direction of the chamber, with or without rotation, to compact, loosen or remove a quantity of material from the chamber. The apparatus may be used in unconfined yield strength tests or powder rheology tests, and may have a sensor 22a, sensitive to resistance to axial and rotary movements. |
