Contraplex CW
The Contraplex is a high-speed fine impact mill equipped with two opposing pin discs. The large grinding chamber design, featuring no screen, is ideal for grinding highly adhesive materials without causing stacking. The counter-rotating design found in the Contraplex can achieve much higher relative speeds in comparison to pin mills with only one rotating pin disc. The outermost pins on the pin disc can reach a maximum relative speed of 250m/s, allowing it to grind brittle raw materials with a maximum Mohs hardness of 3.
Principle of Operation
The raw material fed to the middle of the grinding chamber is finely ground by the two rotating pin discs located on the main body side and the door side of the machine. A dust-proof structure is adopted for the shaft portion to protect the bearing during long-term operations.
Housing:
Welded/casting housing structure
Bottom discharge (standard) or tangential direction discharge is available
Mild steel or stainless steel (SUS304, 316, 316L) construction
Model 250-630CW
Pin Disc and Pins:
Constructed from special steel
Bearing Unit:
Bearing unit protected from dust penetration by purge air (automatic air intake or forced purging)
Features a permanently lubricated or re-lubrication structure for cooling the bearing unit
Option:
Safety interlock mechanism
Pharmaceutical specification available
Explosion-proof design corresponding to ATEX 94/9/EC. Designed to withstand a maximum explosion pressure of 10 bar (G)
Wear protected pins
Features
The wide grinding chamber structure allows generated heat to be discharged efficiently and prevents adhesion buildup.
The high relative speeds generated by the two pin discs allow for fine grinding.
The strong impact generated by the pin discs allows for uniform griding and mixing of composite raw materials made up of more than one substance.
It is ideal for raw materials with Mohs hardness 3 and lower as well as materials with a contamination level of less than 0.1%. (silica, zirconia ceramics, etc.)
The screenless structure is ideal for processing materials with high wear and adhesive characteristics.
Specifications
| 250 CW II | 400 CW II | 630 CW II | 800 CW II | |
|---|---|---|---|---|
| Power factor | 1.0 | 2.0 | 5.0 | 9.0 |
| Drive – housing（kW） | 15 | 30 | 75 | 132 |
| Speed – housing max（rpm） | 9900 | 6700 | 4100 | 3100 |
| Drive – door （kW） | 15 | 30 | 75 | 132 |
| Speed – door max（rpm） | 9900 | 6700 | 4100 | 3100 |
| Purge air（m³/h） | 350 | 500 | 400 | 580 |
| Total air-flow rate（m³/h） | 870 | 1070 | 3700 | 7000 |
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