Self-Cleaning Continuous Flow Screenchanger
The screen changer of the AP.R series is a simple and particularly efficient system for reclaiming plastic materials through the filtration of the impurities.
The particularities of the AP.R screen changer are two ones:
- The filter is made out of a micro-perforated plate, easily available on the market and comparatively cheap
- The patented system of cleaning the plate itself.
Thanks to a patented system, the screen changer is self cleaning and continuous. In fact, from time to time, the screen changer itself cleans the filtering plate from all the hold impurities thanks to a rotating scraper. This happens with the maximum simplicity without any operator's intervention and, above all, it guarantees a high final quality of the plastic material.
The AP.R screen changer has two possible working modalities:
AUTOMATIC, PRESSURE CONTROLLED MODE
The most commonly used system is that which allows a gradual build up of the impurities on the micro-perforated filter plate, thus producing a constant increase in pressure: when a predetermined threshold is reached the cleaning of the filter by the scraper begins automatically.
CONTINUOUS MODE
The self cleaning system can also work in a continuous mode, in which case the rotation of the scraper carriers is non stop, cleaning the plate continuously. This type of use is advised when there is a very high concentration of the impurities in the molten material, or when the material or the system of working requires a constant operating pressure.
The control device
All these operations take place automatically thanks to an internal PLC which controls the main functions, in a precise and safe manner. Even the rotation speed of the scraper system can be adjusted by an "inverter", to prolong the life of the filter in the micro-perforated plate as much as possible.
Advantages
AP.R is EFFECTIVE: pollution free processing
The cleaning, by scraping, of the filtering plate makes possible an accurate processing of materials, even those very polluted with metallic residues, wood, paper, textile fibres, stones and other impurities
- The AP.R series screenchanger allows the recovery of even highly polluted materials and can be used in combination with other Cofit series screenchangers to achieve a high purity material
AP.R is SELF CLEANING: maximum use of the plant
An internal device in the filter periodically cleans, with maximum simplicity, the filtering plate of all impurities
- The possibility of cleaning the plate, avoids the need for its frequent substitution, reducing the necessity of intervention by an operator and above all guarantees a high final quality
AP.R is AUTOMATIC
All cleaning operations take place automatically, thanks to an internal PLC
- It allows a reduction in the costs of management and labour
- It intervenes only when necessary, avoiding waste of time and materials
The pneumatic control does not produce any contamination to the processed product.
| Technical data | |
|---|---|
| Processing | Automatic control, continuous, self-cleaning |
| Type of material | Steel |
| Diameters of filtering unit | From 325 to 600 mm |
| Heaters | Hardened |
| Material status | High pollution |
| Operating temperature | Up to 300° |
| Pressure | Up to 200 bar |
| Hourly capacity | Up to 5000 kg/h |
| Machined product | PE, PP, ABS, PS and molten synthetic resins. |
| Resulting product | Reclaimed plastic material |
The applications
This device is for use in recycling and regeneration plants. It was designed to eliminate residual metals, wood, paper, textile fibres, stones and other impurities which are generally present in plastic material for recycling.
