| 摘要 |
The present invention provides an apparatus for preparing and testing material samples, comprising a back plate and a center section having two mixing chambers formed by two adjacent circular apertures in the center section, each of the mixing chambers having an interior surface with a first angulation sloping down toward the back plate, the center section also including a port in fluid communication with the mixing chambers and the outside of the center section for disposing a material sample within the mixing chambers, the center section being releasably secured to the back plate. A pair of contrarotating rotors, each rotor having an axial shaft and being axially disposed within one of the mixing chambers, is provided, each rotor exhibiting an exterior surface angulation opposite in slope to the first angulation of the mixing chambers, wherein, by virtue of the opposing angulations, there is imparted to the sample within the chambers, a self-releasing physical characteristic which enables the sample to become readily separated from the walls of the mixer and surfaces of the rotors without damage to either the sample or the mixing apparatus. The present apparatus also includes a front plate adapted to be releasably secured to the center section, wherein the counter-rotation of the rotors within the mixing chambers results in the thorough mixing of a flowable sample material within the mixing chambers. The present apparatus also includes a drive shaft for rotating the rotors, a motor shaft for rotating the drive shaft, and a shear pin coupling for attaching the motor shaft to the drive shaft. The apparatus also includes a heating means and a cooling means which is electrically coupled to a sensing means for insuring a homogeneous thermal pattern within the sample material at each stage of the mixing process, the heating, cooling and sensing means being disposed within the three sections.
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