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| Supercritical
CO2 Extractors |
A supercritical carbon dioxide extractor with an effective chamber volume of 20 litres, to be used when rapid binder removal is required. With this equipment, it is possible to extract binder from large injection moulded parts with thicknesses exceeding 30 millimeters. |
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Supercritical CO2 extractor
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Some features of the supercritical
extraction equipment are a recirculating CO2 fluid system,
resulting in very low CO2 consumption, and a separator
continuously separating the binder from the CO2 during
extraction. The following example shows the efficiency
of the system: |
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As an example, the 20 litre extractor can each time be set with 650
pieces of injection moulded watchcases. One complete
extraction cycle takes only five to six hours, by which
90-95% of the binder is removed. The output of the 20
litre chamber unit is thus more than sufficient for
large-scale production. |
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Interior of a 50 litre extractor
chamber set with a limitedl number of parts |
Equally important, we have rationalised
the unit design to be able to offer units at an attractive
price. As a result, the investment cost is actually
comparable to thermal debinding systems. |
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Advantages of supercritical extraction
- Considerably reduced debinding times
- Dispensable powder embedment
- Better form stability - no shrinkage during
extraction
- Finer tolerances - no rearrangement of
particles
- Improved surface finish
- Possible to extract thick-walled components
- No reactions between CO2 and powder - CO2
is thermodynamically stable
- Extracted paraffin ca be reused without
any refinement
- No additional CO2 to the atmosphere
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Technical Data |
Effective chamber volume |
20 litres, 50 litres |
| Supercritical fluid |
CO2 |
| Pressure |
300 bar |
| Temperature |
90°C |
| Flow rate |
1 kg CO2/min (20 l), 2 kg
CO2/min (50 l) |
| Load |
50 kg ( 20 l), 100 kg (50
l) |
| Extraction rate |
0.2 kg binder/h (20 l), 0.4
kg binder/h (50 l) |
| General |
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| Dimensions (w×d×h) |
80×110×170 cm³ (20 l), 90×120×180cm³
(50 l) |
| Weight, approx. |
150 kg (20 l), 250 kg (50
l) |
| Mains connection |
150 kg (20 l),
250 kg (50 l) |
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