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Manfredini & Schianchi’s Rotating Screens allows to achieve with a single operation two important results:
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A final screening of the mixture in order to eliminate the agglomerates which create in the final processing and storage of the material
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A perfect mixing and an homogeneous distribution of the mass on the press mould thus increasing the first choice percentage of the tiles.
The Rotating Screen has been adopted both in ceramic industries with raw materials dry preparation process and in ceramic industries with spray-dry mass prepared.
Rotating Screens Operation diagram
 
A |
Entrance material from press hopper |
B |
Netholder basket |
C |
Homogenization & sifting at alternative rotation |
D |
Homogenized & sifted material ready for press loading |
E |
Rejected material |
F |
Constant operative level |
G |
Maximum level probe |
H |
Minimum level probe – press safety |
The machine is equipped with an automatic self-cleaning system, a minimum level probe and a press-stop probe, hopper screen reject and electrical switchboard.
Crater-like surface |
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As you can see in the pictures, these defects are casued by grains and clots present on the surface of the tile.
If you do not adopt some efficient cleaning and screening system like rotating screens, these defects will persist.
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Typical Installation of MS Rotating Screen 1130SP1500 by SACMI press PH3020 with column clearance of 2300 mm
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| Tiles Manufactured |
Fast double fired wall tile |
| Raw Materials |
Dry processed body composition |
| Presses served |
N.2 Sacmi PH 3020 |
| Cyles/min |
9,5 |
| Amount of cavities |
9 on each row of 2 |
| Tiles size |
200 x 250 mm |
| Tiles thickness |
5,1 mm |
| Water absorption |
15 – 16 % |
| Fired Tiles mechanical resistance |
150 – 160 Kg/cm2 |
| Shrinkage |
0% |
Typical Installation of MS Rotating Screen for Porcelain Stoneware manufacturing
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| Tiles Manufactured |
Porcelain Stoneware tiles |
| Raw Materials |
Spray-dried powder |
| Presses served |
N.2 Sacmi PH 2800 + N.2 Sacmi PH 2590 |
| Cyles/min |
14 |
| Amount of cavities |
2 |
| Tiles size |
400 x 600 mm |
| Tiles thickness |
8 - 9 mm |
| Water absorption |
< 0,5 % |
| Fired Tiles mechanical resistanca |
>= 500 Kg/cm2 |
| Shrinkage |
6% |
Two optionals complete the
- Motion sensor of the basket with press-stop probe
- Electropneumatic guillotine lock
Versions available :
- Rotating Screen 930 for presses until 1400 Ton.
- Rotating Screen 1130 for presses 1400-2500 Ton.
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Rotating Screen 1130-SP1500 for presses sup.2500 Ton.
- Rotating Screen for ACP for presses 1200-2500 ton.
The data shown is indicative and may vary without notice
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