A rheometer comprises a container for receiving a material sample to be investigated, and a rotary driven rotor which can be immersed at least partially into the material sample. At least sections of an inner wall of the container are provided with a profile in order to prevent formation of a sliding layer between the material to be investigated and the inner wall. The profile is thereby formed by at least one, in particular, several profiling elements which are exchangeably held on the container.
1. A rheometer for analysing a material sample, the rheometer comprising;
a container for receiving the material sample;
a rotary driven rotor which is at least partially immersed into the material sample; and
a profile disposed on at least sections of an inner wall of said container, said profile having profiling elements that are exchangeably held on said container, said container wall having several holes into each of which one of said profiling elements can be inserted from an outer side of said container.
2. The rheometer of claim 1 , wherein said profiling elements are lamellas which form strip-like ribs on said inner wall of said container.
3. The rheometer of claim 2 , wherein said ribs extend substantially in a longitudinal direction of said container.
4. The rheometer of claim 1 , wherein said profiling elements extend through approximately an entire height of said container.
5. The rheometer of claim 1 , wherein said profiling elements are substantially uniformly distributed about a periphery of said container.
6. The rheometer of claim 1 , wherein said profiling elements project past an inner wall of said container by equal lengths.
7. The rheometer of claim 1 , wherein said profiling elements project past said inner wall of said container by different lengths.
8. The rheometer of claim 1 , further comprising at least one locking element disposed on said outer side of said container to keep an inserted said profiling element in position.
9. The rheometer of claim 8 , wherein said locking element comprises an outer cup into which said container is tightly fitted.